JP2019074451A - Light measuring device - Google Patents

Abstract

To provide a light measuring device with which it is possible to improve the reliability of measurement for fluids whose concentrations are uneven.SOLUTION: A light measuring device 1 comprises: a tubular member 10 for demarcating circulation paths P1, P2, P3, opened at one end and at the other end, with an inner wall surface 13, allowing a measurement object that is a fluid to circulate; a light-emitting element 30, arranged in some area of the inner wall surface 13, for radiating light toward the circulation paths; a light-receiving element 31, arranged in some area of the inner wall surface 13 fronting on the light-emitting element 30, for detecting measurement light that corresponds to the light radiated by the light-emitting element 30. The light-emitting element 30 includes a sheet-like emission surface 35 that radiates planar light, and the light-receiving element 31 includes a sheet-like reception surface 36 capable of receiving planar measurement light.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical measurement device.

  A light emitting element that emits light toward a flow path through which an object to be measured, which is a fluid, can flow, and measurement light output from the object to be measured according to the light emitted by the light emitting element are detected as the measurement light There is known an optical measurement device including a light receiving element that outputs an output signal corresponding to the light reception element. As such an apparatus, for example, in Patent Documents 1 and 2, a laser, an LED or the like having a smaller light irradiation area with respect to the area of the flow path seen from the light emitting element side is used as a light emitting element. An apparatus disposed outside the distribution channel is disclosed.

Japanese Patent Publication No. 2007-506978 JP 2011-513717 gazette

  By the way, the concentration of the object to be measured, which is a fluid, may be uneven in the flow path. In this case, in the device as described above, since the irradiation area of light is smaller than the area of the flow path seen from the light emitting element side, when light is irradiated to a region where the concentration of the object to be measured is high, When light is irradiated to a region where the concentration of an object is low, output signals having different values are output. Further, in the device as described above, since the light emitting element is disposed outside the distribution channel, the positional relationship between the light emitting element and the distribution channel is easily shifted. For this reason, even if the irradiation area of the light of the light emitting element is adjusted in advance in consideration of the uneven concentration of the object to be measured, the positional relationship between the light emitting element and the circulation path deviates due to a slight external force or the like. As a result, the light emission area of the light emitting element may move, and an appropriate output signal may not be output.

  Therefore, an object of the present invention is to provide an optical measurement device capable of improving the reliability of measurement for a fluid having uneven concentration.

  In the optical measurement device according to the present invention, a flow passage having one end and the other end defined by the inner wall surface, and the object to be measured, which is a fluid, can flow through the flow passage, a tubular member; A light emitting element disposed in a region, which emits light toward the circulation path, and a portion of an inner wall surface facing the light emitting element, detects measurement light according to the light emitted by the light emitting element, A light receiving element for outputting an output signal according to the measurement light, the light emitting element having a sheet-like light emitting surface for emitting planar light, and the light receiving element capable of receiving the planar measurement light It has a sheet-like light receiving surface.

  In this light measurement device, the light emitting element and the light receiving element are disposed on the inner wall surface of the flow path of the tubular member through which the object to be measured, which is a fluid, can flow. When light is irradiated toward the distribution path by the light emitting element, measurement light corresponding to the irradiated light is detected by the light receiving element, and an output signal corresponding to the measurement light is output from the light receiving element. Here, the light emitting element has a sheet-like light emitting surface, and the light emitting surface emits planar light toward the circulation path. For this reason, the irradiation area of light can be made sufficiently large with respect to the area of the flow channel seen from the light emitting element side. As a result, the light is irradiated to the object to be measured over a wide range, so even if the concentration of the object to be measured is uneven, the influence is equalized. Moreover, the light receiving element has a sheet-like light receiving surface, and can receive planar measurement light on the light receiving surface. For this reason, the light irradiated over a wide range by the light emitting element is reliably detected. In addition, the light emitting element is disposed on the inner wall surface of the flow path. For this reason, the positional relationship between the light emitting element and the distribution path is unlikely to shift, and the light irradiation area of the light emitting element does not easily move from the area set in advance. In addition, since the light receiving element is also disposed on the inner wall surface of the flow path, the positional relationship between the light receiving element and the light emitting element and the flow path does not easily shift, and the light irradiated by the light emitting element is stably detected. As described above, this device can improve the reliability of measurement for fluid having uneven concentration.

  The optical measurement device according to the present invention is electrically connected to the light emitting element, is derived from the tubular member, and is a power cable for transmitting the power supplied to the light emitting element, and electrically connected to the light receiving element. And a signal cable for transmitting an output signal derived from the member and output by the light receiving element. According to this, the power cable and the signal cable can be pulled out of the object under measurement while the tubular member is disposed in the object under measurement which is a fluid. Therefore, this device can easily perform the electrical connection and disconnection of the light emitting element to the external power supply and the like, and the electrical connection and disconnection of the light receiving element to the processing device and the like.

  In the light measurement device according to the present invention, each of the light emitting element and the light receiving element may contain an organic semiconductor. According to this, it becomes easy to form each of the light emitting element and the light receiving element in a large area.

  In the light measurement device according to the present invention, each of the tubular member, the light emitting element, and the light receiving element may have flexibility. According to this, the tubular member in which the light emitting element and the light receiving element are disposed on the inner wall surface enters into a narrowly bent gap such as the inside of a living body or a structure while bending according to the inner shape of the gap. Can. Therefore, this device can measure even inside the narrow and bent gap.

  In the light measurement device according to the present invention, the light emitting surface may extend from one end to the other end of the flow path, and the light receiving surface may extend from one end to the other end of the flow path. According to this, the light is irradiated to the object to be measured in a wider range, so that even if the concentration of the object to be measured is uneven, the influence is further leveled. Therefore, this device can further improve the measurement reliability for fluids with non-uniform concentration.

  In the optical measurement device according to the present invention, the tubular member has a plurality of flow paths defined by the inner wall surface, and the light emitting elements disposed in each of the plurality of flow paths have light of different wavelengths toward the flow path. You may irradiate. According to this, this device can perform spectroscopic measurement of the object to be measured.

  In the optical measurement device according to the present invention, the tubular member includes the cylindrical outer frame portion and the inner periphery of the outer frame portion from the axis extending along the extension direction of the outer frame portion inside the outer frame portion. A distribution portion including a plurality of wall portions extending radially to the surface, the flow path including a surface of a pair of wall portions adjacent to each other, and a region between the pair of wall portions of the inner circumferential surface; The light emitting element may be disposed on the surface of the wall, and the light receiving element may be disposed on the inner circumferential surface. According to this, in the manufacturing process of the light measurement device, the light receiving elements are collectively disposed on the inner peripheral surface of the outer frame portion, and thereafter, the partition portion in which the light emitting elements are disposed on the surface of the wall portion It can be inserted into the frame. That is, in this device, it is not necessary to dispose the light receiving element on the inner wall surface in separate steps for each of the plurality of circulation paths. Thus, this device can be manufactured in a simple manner.

  According to the present invention, it is possible to improve the reliability of measurement for fluid having uneven concentration.

FIG. 1 is a schematic perspective view of the light measurement device according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG. FIG. 4 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG. FIG. 5 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG. FIG. 6 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG. FIG. 7 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG. FIG. 8 is a view schematically showing an output signal according to the first embodiment. FIG. 9 is a view schematically showing an output signal according to the second embodiment. FIG. 10 is a diagram schematically showing an output signal according to the third embodiment. FIG. 11 is a view schematically showing an output signal according to the fourth embodiment. FIG. 12 is a schematic perspective view of the light measurement device according to the second embodiment. FIG. 13 is a cross-sectional view taken along the line XIII-XIII of FIG. FIG. 14 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG. FIG. 15 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG. FIG. 16 is a diagram showing a process of the method of manufacturing the optical measurement device shown in FIG.

  Hereinafter, exemplary embodiments will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and redundant description will be omitted.

First Embodiment
[Configuration of light measurement device]
FIG. 1 is a schematic perspective view of the light measurement device 1 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. The optical measurement device 1 shown in FIG. 1 and FIG. 2 irradiates light toward the object to be measured which is fluid (liquid, gas, etc.), and the measurement light output from the object to be measured according to the irradiated light Is a measurement device that detects an output signal corresponding to the measurement light. For example, the light measuring device 1 can measure the absorbance (or the light transmittance) of the object to be measured by detecting light transmitted through the object to be measured as measurement light. The light measurement device 1 can simultaneously perform measurement with a plurality of (here, three) light beams having different wavelengths λ1, λ2, and λ3. The light measurement device 1 includes a tubular member 10, a light emitting element 30, a light receiving element 31, a power cable 32, and a signal cable 33.

  The tubular member 10 is an elongated member that constitutes the main body portion of the light measurement device 1. The tubular member 10 has a plurality of (here, three) flow paths P1, P2 and P3 defined by the inner wall surface 13 open at one end and the other end (corresponding to the number of wavelengths that can be measured). There is. One end of each of the flow paths P1, P2 and P3 opens at one end surface in the extending direction of the tubular member 10, and the other end of each of the flow paths P1, P2 and P3 extends in the extending direction of the tubular member 10 Open at the other end face of the Each of the flow paths P1, P2, and P3 is continuous from one end to the other end. The tubular member 10 is made of, for example, a fluorine resin such as polyethylene, polypropylene, vinyl chloride, polytetrafluoroethylene or the like, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforced plastic). The tubular member 10 is flexible and can bend under external force.

  The tubular member 10 is configured such that an object to be measured, which is a fluid, can flow through the flow paths P1, P2, and P3. The object to be measured enters the distribution path P1 from either one end 21a or the other end 21b of the distribution path P1, passes through the distribution path P1, and is out of the distribution path P1 from either the one end 21a or the other end 21b. I'm going to The object to be measured enters the distribution path P2 from either one end 22a or the other end 22b of the distribution path P2, passes through the distribution path P2, and flows from the other end 22a or the other end 22b to the distribution path P2. Get out of the Further, the object to be measured enters the distribution path P3 from either one end 23a or the other end 23b of the distribution path P3, passes through the distribution path P3, and flows from the other end 23a or the other end 23b to the distribution path P3. Get out of the For example, while the object to be measured is positioned in the flow paths P1, P2, and P3, measurement of absorbance is performed.

  The configuration of the tubular member 10 will be described in more detail. The tubular member 10 has an outer frame portion 15 and a partition portion 16. The outer frame portion 15 has a cylindrical shape with a hollow inside, and forms the outer shape of the tubular member 10. The partition part 16 is located inside the outer frame part 15, and divides the hollow inside the outer frame part 15 into a plurality of (here three) flow paths P1, P2 and P3. The partition 16 extends radially from the axis R extending along the extending direction of the outer frame 15 inside the outer frame 15 to the inner circumferential surface 25 of the outer frame 15 (the number of distribution channels Correspondingly, it is configured to include three wall portions 17, 18 and 19 here. Here, the axis R is the central axis of the outer frame 15 in the extension direction of the outer frame 15, but the axis R is not limited to the central axis of the outer frame 15. Moreover, although the wall parts 17, 18, and 19 are arrange | positioned at equal angles (120 degree | times) mutually here, the angle which the wall parts 17, 18, 19 make mutually may not be equal.

  As described above, the tubular member 10 defines the flow paths P1, P2, and P3 by the inner wall surface 13 thereof. The inner wall surface 13 of the tubular member 10 is, for example, the surfaces 27a, 27b located on the back surface of the region 25a, 25b, 25c of the inner peripheral surface 25 of the outer frame 15 and the wall 17 included in the partition 16 A surface 28a, 28b located at the back of each other at 18 and a surface 29a, 29b located at the back of each other in the wall 19 are configured.

  The pair of wall portions 17 and 18 are adjacent to each other. The region 25 a of the inner circumferential surface 25 of the outer frame portion 15 is a region between the pair of wall portions 17 and 18 of the inner circumferential surface 25. The surface 27a of the wall 17, the surface 28b of the wall 18, and the region 25a of the inner circumferential surface 25 define a flow path P1.

  The pair of wall portions 18 and 19 are adjacent to each other. The region 25 b of the inner circumferential surface 25 of the outer frame portion 15 is a region between the pair of wall portions 18 and 19 of the inner circumferential surface 25. The surface 28 a of the wall 18, the surface 29 b of the wall 19, and the region 25 b of the inner circumferential surface 25 define a flow path P 2.

  The pair of wall portions 19 and 17 are adjacent to each other. The region 25 c of the inner circumferential surface 25 of the outer frame portion 15 is a region between the pair of wall portions 19 and 17 of the inner circumferential surface 25. The surface 29a of the wall 19, the surface 27b of the wall 17, and the region 25c of the inner circumferential surface 25 define a flow path P3.

  The light emitting element 30 is an element which is disposed in a partial region of the inner wall surface 13 and emits light toward the circulation path. The light emitting element 30 is formed in a large area, and has a sheet-like light emitting surface 35 extending from one end of the flow path to the other end. The light emitting element 30 emits planar light toward the circulation path by the light emitting surface 35. The light emitting element 30 is configured to include an organic semiconductor. The organic semiconductor contained in the light emitting element 30 is, for example, cyclopentadiene derivative, carbazole derivative, triphenylamine derivative, quinoline complex, thiadiazole complex, phenylpyridine complex, oxadiazole complex, phenylbenzimidazole complex, polyparaphenylene vinylene derivative, It may be a polyparaphenylene derivative, a polysilane derivative, or a polythiophene derivative. The light emitting element 30 has flexibility and can be bent upon receiving an external force. The light emitting element 30 includes light emitting elements 30a, 30b, and 30c capable of emitting light of different wavelengths.

  The light emitting element 30a can emit light of wavelength λ1. The light emitting element 30a is disposed on the distribution path P1. More specifically, the light emitting element 30 a is disposed on the surface 27 a of the wall 17 and the surface 28 b of the wall 18. The light emitting element 30a has a sheet-like light emitting surface 35a extending from one end 21a to the other end 21b of the flow path P1. The light emitting element 30a irradiates light in a plane toward the flow path P1 by the light emitting surface 35a. Accordingly, the light emitting element 30a can emit light to a wide range (for example, the entire area or substantially the entire area) of the distribution path P1 viewed from the light emitting element 30a side toward the distribution path P1.

  The light emitting element 30b can emit light of wavelength λ2. The light emitting element 30b is disposed on the distribution path P2. More specifically, the light emitting element 30 b is disposed on the surface 28 a of the wall 18 and the surface 29 b of the wall 19. The light emitting element 30b has a sheet-like light emitting surface 35b extending from one end 22a to the other end 22b of the flow path P2. The light emitting element 30b irradiates light in a plane toward the flow path P2 by the light emitting surface 35b. Thereby, the light emitting element 30b can emit light to a wide range (for example, the entire area or substantially the entire area) of the distribution path P2 viewed from the light emitting element 30b side toward the distribution path P2.

  The light emitting element 30c can emit light of wavelength λ3. The light emitting element 30c is disposed on the distribution path P3. More specifically, the light emitting element 30 c is disposed on the surface 29 a of the wall 19 and the surface 27 b of the wall 17. The light emitting element 30c has a sheet-like light emitting surface 35c extending from one end 23a to the other end 23b of the flow path P3. The light emitting element 30c irradiates light in a plane toward the flow path P3 by the light emitting surface 35c. Thereby, the light emitting element 30c can emit light to a wide range (for example, the entire area or substantially the entire area) of the distribution path P3 viewed from the light emitting element 30c side toward the distribution path P3.

  The light receiving element 31 is disposed in a partial region of the inner wall surface 13 facing the light emitting element 30, detects measurement light according to the light irradiated by the light emitting element 30, and outputs an output signal according to the measurement light It is an element. The light receiving element 31 is formed in a large area, and has a sheet-like light receiving surface 36 extending from one end of the flow path to the other end. The light receiving element 31 can receive planar measurement light on the light receiving surface 36. The light receiving element 31 is configured to include an organic semiconductor. The organic semiconductor contained in the light receiving element 31 has, for example, a skeleton derived from at least one compound selected from the group consisting of thiophene, benzothiophene, phenylenevinylene, carbazole, thienopyrrole, diketopyrrolopyrrole, and derivatives thereof. It may be a compound. The light receiving element 31 has flexibility, and can be bent upon receiving an external force. The light receiving element 31 is composed of light receiving elements 31a, 31b, and 31c.

  Here, the “region of the inner wall facing the light emitting element” means the region of the inner wall facing the light emitting element (light emitting surface) at a predetermined angle (for example, 180 degrees) or less. For example, the state in which the region of the inner wall faces the light emitting element at an angle of 0 degrees means that the inner wall and the light emitting element face each other so as to be parallel to each other. Further, for example, the state in which the region of the inner wall faces the light emitting element at an angle of 90 degrees means that the inner wall and the light emitting element are orthogonal to each other. In other words, “an area of the inner wall facing the light emitting element” means an area of the inner wall at a position where it can directly receive the light irradiated by the light emitting element (or the measurement light according to the light). It is.

  The light receiving element 31a is disposed on the circulation path P1. More specifically, the light receiving element 31a is disposed in the region 25a of the inner circumferential surface 25 facing the light emitting element 30a. The light receiving element 31a has a sheet-like light receiving surface 36a extending from one end 21a to the other end 21b of the flow path P1. The light receiving element 31a can receive planar measurement light on the light receiving surface 36a. Thereby, the light receiving element 31a is light irradiated in a surface shape by the light emitting element 30a (that is, the entire area or substantially the whole of the distribution path P1 viewed from the light emitting element 30a side toward the distribution path P1 by the light emitting element 30a. It is possible to detect measurement light according to the irradiated light.

  The light receiving element 31b is disposed on the circulation path P2. More specifically, the light receiving element 31b is disposed in the region 25b of the inner circumferential surface 25 facing the light emitting element 30b. The light receiving element 31b has a sheet-like light receiving surface 36b extending from one end 22a to the other end 22b of the flow path P2. The light receiving element 31 b can receive planar measurement light on the light receiving surface 36 b. Thereby, the light receiving element 31b is light irradiated in a surface shape by the light emitting element 30b (that is, the entire area or substantially the entire area of the distribution path P2 viewed from the light emitting element 30b side toward the distribution path P2 by the light emitting element 30b. It is possible to detect measurement light according to the irradiated light.

  The light receiving element 31c is disposed on the circulation path P3. More specifically, the light receiving element 31c is disposed in the region 25c of the inner circumferential surface 25 facing the light emitting element 30c. The light receiving element 31c has a sheet-like light receiving surface 36c extending from one end 23a to the other end 23b of the flow path P3. The light receiving element 31c can receive planar measurement light on the light receiving surface 36c. Thereby, the light receiving element 31c is light irradiated in a surface shape by the light emitting element 30c (that is, the entire area or substantially the entire area of the distribution path P3 viewed from the light emitting element 30c side toward the distribution path P3 by the light emitting element 30c. It is possible to detect measurement light according to the irradiated light.

  The power cable 32 is a cable that is electrically connected to the light emitting element 30 and is led out of the tubular member 10 (that is, pulled out from the tubular member 10) and transmits the power supplied to the light emitting element 30. Here, the power cable 32 includes a power cable 32a corresponding to the light emitting element 30a, a power cable 32b corresponding to the light emitting element 30b, and a power cable 32c corresponding to the light emitting element 30c.

  The power cable 32a is connected to the light emitting element 30a in the vicinity of one end 21a in the flow path P1, for example, and is drawn from the tubular member 10 through the opening of the one end 21a of the flow path P1. The power cable 32b is connected to the light emitting element 30b in the vicinity of one end 22a in the flow path P2, for example, and is drawn out of the tubular member 10 through the opening of the one end 22a of the flow path P2. The power cable 32c is connected to the light emitting element 30c in the vicinity of one end 23a in the flow path P3, for example, and is drawn from the tubular member 10 through the opening of the one end 23a of the flow path P3.

  Each of power cables 32 a, 32 b, 32 c is electrically connected to external power supply 45. Note that each of the light emitting elements 30a, 30b, and 30c may be connected to an external power supply 45 separate from each other.

  The signal cable 33 is a cable which is electrically connected to the light receiving element 31 and is drawn out from the tubular member 10 (that is, pulled out from the tubular member 10 to the outside) and transmits an output signal output by the light receiving element 31. . Here, the signal cable 33 includes a signal cable 33a corresponding to the light receiving element 31a, a signal cable 33b corresponding to the light receiving element 31b, and a signal cable 33c corresponding to the light receiving element 31c.

  The signal cable 33a is connected to the light receiving element 31a in the vicinity of one end 21a in the circulation path P1, for example, and is led out from the tubular member 10 through the opening of the one end 21a of the circulation path P1. The signal cable 33b is connected to the light receiving element 31b in the vicinity of one end 22a in the flow path P2, for example, and is led out of the tubular member 10 through the opening of the one end 22a of the flow path P2. The signal cable 33c is connected to the light receiving element 31c in the vicinity of one end 23a in the flow path P3, for example, and is led out of the tubular member 10 through the opening of the one end 23a of the flow path P3.

  Each of the signal cables 33a, 33b and 33c is electrically connected to a processing device 46 which receives an output signal and processes the input signal. Each of the signal cables 33a, 33b, and 33c may be electrically connected to a storage device that receives an output signal and stores information related to the output signal, instead of the processing device 46. Also, each of the signal cables 33a, 33b, 33c may be connected to the processing device 46 separate from each other or a storage device separate from each other.

[Method of manufacturing light measuring device]
An example of a method of manufacturing the light measurement device 1 will be described. FIGS. 3-7 is a figure which shows 1 process of the manufacturing method of the optical measuring device 1 shown by FIG. In this method, first, as shown in FIG. 3, a rectangular flat first substrate 50 for the outer frame portion 15 is prepared (first step). Hereinafter, for convenience of explanation, the length of the first substrate 50 along the sides of the first substrate 50 in the x-axis direction is X, and the length in the y-axis direction orthogonal to the x-axis direction is Y in plan view. It shall be formed as follows. The first substrate 50 is made of, for example, a fluorine resin such as polyethylene, polypropylene, vinyl chloride or polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforcing plastic), Have.

  Subsequently, the sheet-like light receiving element 31 is disposed on one surface 51 of the first substrate 50 (second step). More specifically, on one surface 51 of the first substrate 50, from one side 52 to the other side 53 of the first substrate 50 along the x-axis direction, the non-arrangement area 54a, the arrangement area 55a, the non-arrangement area 54b, the arrangement The light receiving element 31 is disposed such that the strip-like regions are arranged in the order of the region 55b, the non-arrangement region 54c, and the arrangement region 55c. The “non-arranged area” is an area where the light receiving element 31 is not arranged. The "arrangement area" is an area in which the light receiving element is arranged. The boundary between each non-arrangement area and each arrangement area adjacent to the non-arrangement area is parallel to the y-axis direction. The length in the x-axis direction of each non-placement area is equal to each other, and the length in the x-axis direction of each placement area is equal to each other.

  The arrangement region 55 a corresponds to the region 25 a of the inner peripheral surface 25 of the outer frame portion 15 in the light measurement device 1. The light receiving element 31a is disposed in the placement area 55a. The arrangement area 55 b corresponds to the area 25 b of the inner peripheral surface 25 of the outer frame portion 15 in the light measurement device 1. The light receiving element 31b is arranged in the arrangement area 55b. The arrangement area 55 c corresponds to the area 25 c of the inner peripheral surface 25 of the outer frame portion 15 in the light measurement device 1. The light receiving element 31c is arranged in the arrangement area 55c.

  The light receiving elements 31a, 31b, and 31c are formed on one surface 51 by, for example, spin coating, liquid dispensing (dispenser), inkjet printing, spraying, vacuum evaporation, or a method of immersing the first substrate 50 in a liquid phase. Be placed. For example, when the above-described method is performed with the non-arranged areas 54a, 54b, 54c masked, the light receiving elements 31a, 31b, 31c are collectively arranged on one surface 51 of the first substrate 50. .

  In the first step, a first substrate 50 having a length in the x-axis direction larger than that of a rectangle having a length in the x-axis direction and a length in the y-axis direction of Y is prepared, and after the second step, the first substrate 50 is prepared. The substrate 50 may be cut so that the length in the x-axis direction is rectangular and the length in the y-axis direction is Y.

  Subsequently, as shown in FIG. 4, the first substrate 50 is rounded so that one surface 51 of the first substrate 50 is inside, and one side 52 of the first substrate 50 is joined to the other side 53. (Third step). One side 52 and the other side 53 of the first substrate are bonded to each other by, for example, a bonding method or a heat fusion method. Thereby, the cylindrical outer frame portion 15 in which the light receiving elements 31a, 31b, 31c are disposed on the inner peripheral surface 25 is formed.

  Subsequently, as shown in FIG. 5, a rectangular flat second substrate 60, a third substrate 70, and a fourth substrate 80 for the partition 16 are prepared (fourth step). The second substrate 60, the third substrate 70, and the fourth substrate 80 have a length in the x-axis direction along the sides of each substrate of X / peripheral ratio (that is, the inner diameter of the outer frame portion 15) in plan view The same length) and the length in the y-axis direction orthogonal to the x-axis direction are formed to be Y (that is, the same length as the extending direction of the outer frame portion 15). The second substrate 60, the third substrate 70, and the fourth substrate 80 are made of, for example, a fluorine resin such as polyethylene, polypropylene, vinyl chloride or polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforced plastic And is flexible.

  Subsequently, the sheet-like light emitting element 30 is disposed on one surface of each of the second substrate 60, the third substrate 70, and the fourth substrate 80 (fifth step). 5A is a perspective view showing the second substrate 60 on which the light emitting element 30 is disposed, and FIG. 5B is a perspective view showing the third substrate 70 on which the light emitting element 30 is disposed. FIG. 5C is a perspective view showing the fourth substrate 80 on which the light emitting element 30 is disposed.

  More specifically, on one surface 61 of the second substrate 60, at least a partial region in the y-axis direction (here, the entire region in the y-axis direction) and the entire region (or substantially the entire region) in the x-axis direction And a light emitting element 30a capable of emitting light of wavelength λ1. The region where the light emitting element 30 a is disposed in one surface 61 is a region 61 a corresponding to the surface 27 a of the wall 17 of the partition 16 in the light measurement device 1 and a region 61 b corresponding to the surface 28 b of the wall 18 is there.

  Further, in one surface 71 of the third substrate 70, the wavelength λ2 is provided in at least a partial region in the y-axis direction (here, the entire region in the y-axis direction) and in the entire region (or substantially the entire region) in the x-axis direction. The light emitting element 30 b capable of emitting the light of The area where the light emitting element 30 b is disposed on one surface 71 is an area 71 a corresponding to the surface 28 a of the wall 18 of the partition 16 in the light measurement device 1 and an area 71 b corresponding to the surface 29 b of the wall 19. is there.

  In one surface 81 of the fourth substrate 80, the wavelength λ3 is provided in at least a partial region in the y-axis direction (here, the entire region in the y-axis direction) and in the entire region (or substantially the entire region) in the x-axis direction. The light emitting element 30c capable of emitting the light of The area where the light emitting element 30 c is disposed on one surface 81 is an area 81 a corresponding to the surface 29 a of the wall 19 of the partition 16 in the light measurement device 1 and an area 81 b corresponding to the surface 27 b of the wall 17 is there.

  The light emitting elements 30a, 30b, and 30c are, for example, spin coating, liquid quantitative discharge method (dispenser), inkjet printing, spray method, vacuum evaporation method, or substrate (second substrate 60, third substrate 70, fourth substrate 80) Are placed on one surface 61, 71, 81 by a method of immersing the liquid into a liquid phase.

  In the fourth step, the second substrate 60, the third substrate 70, and the fourth substrate 60 have a length in the x-axis direction larger than that of a rectangle having a length in the x-axis direction and a length in the y-axis direction of y. The substrate 80 is prepared, and after the fifth step, the lengths of the second substrate 60, the third substrate 70, and the fourth substrate 80 in the x-axis direction are X / peripheral ratio, and the length in the y-axis direction is Y You may cut so that it may become a rectangle of.

  Subsequently, as shown in FIG. 6, the other surface 62 located on the back surface of one surface 61 of the second substrate 60, the other surface 72 located on the back surface of one surface 71 of the third substrate 70, and The other surface 82 located on the back surface of the one surface 81 of the fourth substrate 80 is bonded to each other to form the partition portion 16 (sixth step). The other surface 62 of the second substrate 60, the other surface 72 of the third substrate 70, and the other surface 82 of the fourth substrate 80 are bonded together by, for example, a bonding method or a heat sealing method.

  More specifically, the area 62a located on the back of the area 61a of the one surface 61 of the second substrate 60 and the area 82b located on the back of the area 81b of the one surface 81 of the fourth substrate 80 stick to each other Together, the wall 17 is formed. Further, a region 72a located on the back of the region 71a of the one surface 71 of the third substrate 70 and a region 62b located on the back of the region 61b on the one surface 61 of the second substrate 60 are bonded to each other The wall 18 is formed. Further, a region 82a located on the back of the region 81a of the one surface 81 of the fourth substrate 80 and a region 72b located on the back of the region 71b of the one surface 71 of the third substrate 70 are bonded together, The wall 19 is formed.

  The order of the steps from the first step to the third step and the steps from the fourth step to the sixth step is not particularly limited, and the steps from the fourth step to the sixth step are performed first. The steps from the first step to the third step may be performed later.

  Subsequently, as shown in FIG. 7, the partitioning portion 16 formed in the sixth step is inserted into the outer frame portion 15 formed in the third step (seventh step). More specifically, the outer frame portion 15 is divided into the partition portions 16 so that the wall portions 17, 18, 19 of the partition portion 16 abut the non-arranged areas 54a, 54b, 54c in the inner circumferential surface 25 of the outer frame portion 15. insert. The non-arranged regions 54a, 54b, 54c and the wall portions 17, 18, 19 are fixed to each other by, for example, a bonding method or a heat sealing method.

  Subsequently, the power cable 32a is connected to the light emitting element 30a, the power cable 32b is connected to the light emitting element 30b, and the power cable 32c is connected to the light emitting element 30c (eighth step). The light emitting elements 30a, 30b, 30c and the power cables 32a, 32b, 32c are connected by, for example, soldering or pressure bonding. The signal cable 33a is connected to the light receiving element 31a, the signal cable 33b is connected to the light receiving element 31b, and the signal cable 33c is connected to the light receiving element 31c (ninth step). The light receiving elements 31a, 31b, 31c and the signal cables 33a, 33b, 33c are connected by, for example, soldering or pressure bonding. Thus, the optical measurement device 1 is manufactured (see FIG. 1).

[Example]
FIG. 8 is a view schematically showing an output signal according to the first embodiment. In FIG. 8, the horizontal axis indicates the wavelength of light irradiated by the light emitting element 30, and the vertical axis indicates the intensity of the output signal output by the light receiving element 31. In the light measurement device 1 according to the first embodiment, the light emitting element 30a emits light of wavelength λ1. In addition, the light emitting element 30b emits light of wavelength λ2, which is longer than wavelength λ1. In addition, the light emitting element 30c emits light of wavelength λ3 which is longer than wavelength λ2.

  The output signal diagram of FIG. 8 schematically shows an output signal under the condition that air is flowing in the flow paths P1, P2, and P3. Under this condition, the light emitted by the light emitting element 30 reaches the light receiving element 31 with almost no attenuation. The intensity of each output signal under this condition is set to "1" which is a reference value. In addition, the reference value of the intensity of each output signal may be set based on the output signal in the condition which made the inside of distribution channel P1, P2, P3 a vacuum state.

  FIG. 9 is a view schematically showing an output signal according to the second embodiment. The difference between the output signal diagram of FIG. 9 and the output signal diagram of FIG. 8 is that a fluid that selectively absorbs light of wavelength λ2 flows as a measurement object in the flow paths P1, P2, and P3. Is a point schematically showing the output signal at It can be seen from FIG. 9 that the light of wavelength λ1 and the light of wavelength λ3 are not absorbed by the object to be measured, while the light of wavelength λ2 is absorbed by the object to be measured. FIG. 10 is a diagram schematically showing an output signal according to the third embodiment. The output signal diagram of FIG. 10 differs from the output signal diagram of FIG. 9 in that, in addition to a fluid that selectively absorbs light of wavelength λ2, as a measurement object, in flow paths P1, P2 and P3, wavelength λ3. Is a point schematically showing an output signal under a condition in which a fluid that selectively absorbs light of the formula (1) is circulated as an impurity. It can be seen from FIG. 10 that, in addition to the light of wavelength λ2, the light of wavelength λ3 is also absorbed. As shown in FIGS. 9 and 10, according to the optical measurement device 1, light selectively absorbed as an impurity in addition to the fluid whose wavelength to be selectively absorbed is known in advance to the object to be measured. It can be determined whether or not another type of fluid whose wavelength is known is included.

  FIG. 11 is a view schematically showing an output signal according to the fourth embodiment. The output signal diagram of FIG. 11 differs from the output signal diagram of FIG. 9 in that the output signal under the condition that a mixed fluid of three types of fluids is flowing as an object to be measured in the flow paths P1, P2 and P3. Is a point schematically shown. The degree of absorption of light of wavelength λ1, light of wavelength λ2, and light of wavelength λ3 is measured in advance for each fluid included in the mixed fluid. Then, based on the degree of absorption measured in advance, the mixing ratio of each fluid is calculated from the output signal of FIG. Therefore, according to the light measurement device 1, it is possible to detect the mixing ratio of each fluid contained in the object to be measured which is a mixed fluid.

[Action and effect]
In the optical measurement device 1, the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c are disposed on the inner wall surface 13 of the flow paths P1, P2, P3 of the tubular member 10 through which the object to be measured can flow. ing. When light is irradiated toward the distribution paths P1, P2, P3 by the light emitting elements 30a, 30b, 30c, measurement light corresponding to the irradiated light is detected by the light receiving elements 31a, 31b, 31c, and the measurement light is detected. Corresponding output signals are output from the light receiving elements 31a, 31b and 31c. Here, the light emitting elements 30a, 30b, and 30c have sheet-like light emitting surfaces 35a, 35b, and 35c, and planar light is emitted toward the flow paths P1, P2, and P3 by the light emitting surfaces 35a, 35b, and 35c. Do. For this reason, the irradiation area of light can be made sufficiently large with respect to the area of the flow paths P1, P2 and P3 as viewed from the light emitting elements 30a, 30b and 30c. As a result, the light is irradiated to the object to be measured over a wide range, so even if the concentration of the object to be measured is uneven, the influence is equalized. In addition, the light receiving elements 31a, 31b, and 31c have sheet-like light receiving surfaces 36a, 36b, and 36c, and can receive planar measurement light on the light receiving surfaces 36a, 36b, and 36c. For this reason, the light irradiated over a wide range by the light emitting elements 30a, 30b, and 30c is reliably detected. The light emitting elements 30a, 30b, and 30c are disposed on the inner wall surface 13 of the flow paths P1, P2, and P3. Therefore, the positional relationship between the light emitting elements 30a, 30b, and 30c and the flow paths P1, P2, and P3 does not easily shift, and the light irradiation areas of the light emitting elements 30a, 30b, and 30c do not easily move from the preset area. Moreover, since the light receiving elements 31a, 31b, 31c are also disposed on the inner wall surface 13 of the flow paths P1, P2, P3, the light receiving elements 31a, 31b, 31c and the light emitting elements 30a, 30b, 30c and the flow paths P1, P2, The positional relationship with P3 is not easily deviated, and the light emitted by the light emitting elements 30a, 30b, and 30c is stably detected. As described above, the optical measurement device 1 can improve the reliability of the measurement for the fluid whose concentration is not uniform.

  The light measurement device 1 is electrically connected to the light emitting elements 30a, 30b, and 30c, and is derived from the tubular member 10, and power cables 32a, 32b, and 32c transmit power supplied to the light emitting elements 30a, 30b, and 30c. And signal cables 33a, 33b, and 33c which are electrically connected to the light receiving elements 31a, 31b, and 31c, are derived from the tubular member 10, and transmit output signals output from the light receiving elements 31a, 31b, and 31c. Have. Thus, the power cables 32a, 32b, 32c and the signal cables 33a, 33b, 33c can be pulled out of the object under measurement in a state where the tubular member 10 is disposed in the object under measurement which is a fluid. Therefore, the optical measurement device 1 electrically connects and disconnects the light emitting elements 30a, 30b and 30c to the external power supply 45 and the like, and electrically connects and disconnects the light receiving elements 31a, 31b and 31c to the processing device 46 and the like. It can be done easily.

  In the light measurement device 1, each of the light emitting elements 30a, 30b, and 30c and the light receiving elements 31a, 31b, and 31c includes an organic semiconductor. As a result, it becomes easy to form each of the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c in a large area. In addition, even when the inner wall surface 13 of the flow paths P1, P2 and P3 of the tubular member 10 is curved, the light measurement device 1 reliably emits the light emitting elements 30a, 30b and 30c and the light receiving elements 31a, 31b and 31c. It can be arranged. In addition, the light measurement device 1 does not depend on the shape of the inner wall surface 13 of the flow paths P1, P2 and P3 of the tubular member 10, but the light emitting elements 30a, 30b and 30c and the light receiving elements 31a and 31b by a method such as printing or spraying. , 31c can be arranged. Further, in the light measurement device 1, it is possible to reduce the manufacturing cost as compared with the light emitting element and the light receiving element of the inorganic type semiconductor.

  In the light measurement device 1, each of the tubular member 10, the light emitting elements 30a, 30b, and 30c, and the light receiving elements 31a, 31b, and 31c have flexibility. Thereby, the tubular member 10 in which the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c are disposed on the inner wall surface 13 is the inside of the narrowly bent gap, for example, the inside of a living body or a structure It can enter while bending according to the shape. Therefore, the light measurement device 1 can perform measurement even inside the narrowly bent gap.

  In the light measurement device 1, the light emitting surfaces 35a, 35b, 35c extend from one end 21a, 22a, 23a of the flow paths P1, P2, P3 to the other end 21b, 22b, 23b, and the light receiving surfaces 36a, 36b, 36c are The flow paths P1, P2 and P3 extend from one end 21a, 22a and 23a to the other end 21b, 22b and 23b. Thus, the light is irradiated to the object to be measured in a wider range, so that even if the concentration of the object to be measured is nonuniform, the influence is further leveled. Therefore, the light measuring device 1 can further improve the reliability of the measurement for the fluid whose concentration is not uniform.

  In the optical measurement device 1, the tubular member 10 defines the plurality of flow paths P1, P2 and P3 by the inner wall surface 13, and the light emitting elements 30a, 30b, arranged in the plurality of flow paths P1, P2 and P3, respectively. The light 30c emits light of different wavelengths toward the flow paths P1, P2, and P3. Thereby, the optical measurement device 1 can perform the spectroscopic measurement of the object to be measured.

  In the light measurement device 1, the tubular member 10 includes the cylindrical outer frame 15 and the axis R extending along the extension direction of the outer frame 15 inside the outer frame 15. And the partition portion 16 including a plurality of wall portions 17, 18, 19 radially extending to the inner circumferential surface 25 of the flow path P 1, and the flow path P 1 includes the surfaces 27 a, 28 b of the pair of wall portions 17, 18 adjacent to each other , And a flow path P2 is defined by a region 25a between the pair of corresponding wall portions 17 and 18 in the inner circumferential surface 25 and the flow path P2 is formed inside the surfaces 28a and 29b of the pair of wall portions 18 and 19 adjacent to each other. A flow path P3 is defined by a region 25b between the pair of the wall portions 18 and 19 in the circumferential surface 25 and the flow path P3 is formed on the surfaces 29a and 27b of the pair of wall portions 19 and 17 adjacent to each other Region 25c between the pair of corresponding wall portions 19 and 17 of The light emitting element 30a is disposed on the surface 27a of the wall 17 and the surface 28b of the wall 18, and the light emitting element 30b is disposed on the surface 28a of the wall 18 and the surface 29b of the wall 19. Is disposed on the surface 29 a of the wall 19 and the surface 27 b of the wall 17, the light receiving element 31 a is disposed on the area 25 a of the inner circumferential surface 25, and the light receiving element 31 b is disposed on the area 25 b of the inner circumferential surface 25 The light receiving element 31 c is disposed in the region 25 c of the inner circumferential surface 25. Thereby, in the manufacturing process of the light measurement device 1, the light receiving elements 31a, 31b, 31c are disposed collectively on the inner circumferential surface 25 of the outer frame portion 15, and thereafter, on the respective surfaces of the wall portions 17, 18, 19. The partition portion 16 in which the light emitting elements 30a, 30b, and 30c are disposed can be inserted into the outer frame portion 15. That is, in the optical measurement device 1, it is not necessary to dispose the light receiving elements 31a, 31b, 31c on the inner wall surface 13 in separate steps for each of the plurality of flow paths P1, P2, P3. Therefore, the optical measurement device 1 can be manufactured by a simple method.

Second Embodiment
[Configuration of light measurement device]
FIG. 12 is a schematic perspective view of an optical measurement device 1A according to the second embodiment. FIG. 13 is a cross-sectional view taken along the line XIII-XIII of FIG. As shown in FIGS. 12 and 13, the point that the optical measurement device 1A according to the second embodiment differs from the light measurement device 1 according to the first embodiment is that the tubular member 10A has one flow passage P4 by the inner wall surface 13A. The light emitting element 30A is a point that emits light of a single wavelength λ4 toward the distribution path P4. Hereinafter, regarding the configuration of the light measurement device 1A, points different from the configuration of the light measurement device 1 are mainly described. The optical measurement device 1A includes a tubular member 10A, a light emitting element 30A, a light receiving element 31A, a power cable 32A, and a signal cable 33A.

  The tubular member 10A is a long member that constitutes the main body of the light measurement device 1A. One flow path P4 in which the one end 24a and the other end 24b are open is defined by the inner wall surface 13A. One end 24a of the flow path P4 is open at one end surface in the extending direction of the tubular member 10A, and the other end 24b of the flow path P4 is open at the other end surface in the extending direction of the tubular member 10A. The flow path P4 is continuous from the one end 24a to the other end 24b. The tubular member 10A is made of, for example, a fluorine resin such as polyethylene, polypropylene, vinyl chloride or polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforcing plastic). The tubular member 10A has flexibility, and can bend under external force.

  The tubular member 10A is configured such that an object to be measured which is a fluid can flow in the flow path P4. The object to be measured enters the distribution path P4 from either one end 24a or the other end 24b of the distribution path P4, passes through the distribution path P4, and is out of the distribution path P4 from either the other end 24a or the other end 24b. I'm going to While the object to be measured is located in the flow path P4, for example, measurement of absorbance is performed.

  The tubular member 10A has an outer frame portion 15A. The inner wall surface 13A of the tubular member 10A is constituted by, for example, the regions 25d and 25e of the inner peripheral surface 25A of the outer frame portion 15A. The area 25d is one of the areas obtained by dividing the inner circumferential surface 25A by a plane including the central axis of the tubular member 10A, and the area 25e is the other area. The tubular member 10A does not have a partition.

  The light emitting element 30A can emit light of wavelength λ4. The light emitting element 30A is disposed on the distribution path P4. The light emitting element 30A is disposed in a partial region of the inner wall surface 13A. More specifically, the light emitting element 30A is disposed in the region 25d of the inner peripheral surface 25A of the outer frame portion 15A. The light emitting element 30A has a sheet-like light emitting surface 35A extending from one end 24a to the other end 24b of the flow path P4, and irradiates planar light toward the flow path P4. Thereby, the light emitting element 30A can emit light to a wide range (for example, the entire area or substantially the entire area) of the distribution path P4 viewed from the light emitting element 30A side toward the distribution path P4.

  The light receiving element 31A is disposed on the circulation path P4. The light receiving element 31A is disposed in a partial region of the inner wall surface 13A facing the light emitting element 30A. More specifically, the light receiving element 31A is disposed in the region 25e of the inner peripheral surface 25A of the outer frame portion 15A. The light receiving element 31A has a sheet-like light receiving surface 36A extending from one end 24a to the other end 24b of the flow path P4, and can receive planar measurement light. Thereby, the light receiving element 31A is irradiated with light irradiated in a surface shape by the light emitting element 30A (that is, the light emitting element 30A irradiates substantially the entire area of the distribution path P4 viewed from the light emitting element 30A toward the distribution path P4. Measurement light corresponding to the light) can be detected.

  The power cable 32A is a cable that is electrically connected to the light emitting element 30A and is drawn out from the tubular member 10A (that is, pulled out from the tubular member 10A to the outside) to transmit the power supplied to the light emitting element 30A. The power cable 32A is connected to the light emitting element 30A in the vicinity of one end 24a in the flow path P4, for example, and is drawn from the tubular member 10A through the opening of the one end 24a of the flow path P4. Power cable 32A is electrically connected to external power supply 45.

  The signal cable 33A is a cable that is electrically connected to the light receiving element 31A and is derived from the tubular member 10A (that is, pulled out from the tubular member 10A to the outside) and transmits an output signal output from the light receiving element 31A. . The signal cable 33A is connected to the light receiving element 31A in the vicinity of one end 24a in the flow path P4, for example, and is led out from the tubular member 10A through the opening of the one end 24a of the flow path P4. The signal cable 33A is electrically connected to the processing device 46 or a storage device or the like.

[Method of manufacturing light measuring device]
An example of a method of manufacturing the light measurement device 1A will be described. 14 to 16 are diagrams showing one step of a method of manufacturing the optical measurement device 1A shown in FIG. In this method, first, as shown in FIG. 14, rectangular flat fifth substrate 90 and sixth substrate 100 for the outer frame portion 15A are prepared (tenth step). Each of the fifth substrate 90 and the sixth substrate 100 has a length in the x-axis direction along the side of each substrate of X and a length in the y-axis direction orthogonal to the x-axis direction of Y / 2 in plan view. It is formed to be Each of the fifth substrate 90 and the sixth substrate 100 includes, for example, a fluorine resin such as polyethylene, polypropylene, vinyl chloride or polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or some FRP (reinforcing plastic). It is configured and flexible.

  Subsequently, the sheet-like light emitting element 30A is disposed on the entire area (or substantially the entire area) of one surface 91 of the fifth substrate 90 (an eleventh step). The area where the light emitting element 30A is disposed on the one surface 91 is an area 91a corresponding to the area 25d of the inner peripheral surface 25A of the outer frame portion 15A in the light measurement device 1A.

  Subsequently, the sheet-like light receiving element 31A is disposed in the disposition area 105 set in the entire area (or substantially the entire area) of the one surface 101 of the sixth substrate 100 (a twelfth step). The arrangement area 105 corresponds to the area 25e of the inner peripheral surface 25A of the outer frame portion 15A in the light measurement device 1A.

  In the tenth step, a fifth substrate 90 having a length in the x-axis direction X and a length in the y-axis direction larger than that of the rectangle in a Y-axis direction is prepared in plan view, and after the eleventh step The fifth substrate 90 may be cut such that the length in the x-axis direction is X and the length in the y-axis direction is Y / 2. In the tenth step, a sixth substrate 100 is prepared which is larger in plan view than a rectangle having a length in the x-axis direction of X and a length in the y-axis direction of Y / 2, and after the twelfth step The sixth substrate 100 may be cut so that the length in the x-axis direction is rectangular and the length in the y-axis direction is Y / 2.

  Subsequently, as shown in FIG. 15, one side 92 of the fifth substrate 90 and the sixth substrate 100 such that one surface 91 of the fifth substrate 90 and one surface 101 of the sixth substrate 100 are inside. And the other side 93 of the fifth substrate 90 and the side 102 of the sixth substrate 100 (the thirteenth step). Note that one side 92 and the other side 93 of the fifth substrate 90 are a pair of sides opposed in the x-axis direction. The side 102 and the other side 103 of the sixth substrate 100 are a pair of sides facing each other in the x-axis direction. The fifth substrate 90 and the sixth substrate 100 are fixed to each other by, for example, an adhesion method or a heat fusion method. Thereby, as shown in FIG. 16, the cylindrical outer frame portion 15A in which the light emitting element 30A and the light receiving element 31A are disposed is formed on the inner peripheral surface 25A.

  Subsequently, the power cable 32A is connected to the light emitting element 30A (step 14). Further, the signal cable 33A is connected to the light receiving element 31A (fifteenth step). Thus, the optical measurement device 1A is manufactured (see FIG. 12).

[Action and effect]
In the optical measurement device 1A, the light emitting element 30A and the light receiving element 31A are disposed on the inner wall surface 13A of the flow path P4 of the tubular member 10A through which the object to be measured, which is a fluid, can flow. When light is irradiated in a planar shape toward the distribution path P4 by the light emitting element 30A, measurement light corresponding to the irradiated light is detected by the light receiving element 31A, and an output signal corresponding to the measurement light is detected from the light receiving element 31A. It is output. Here, the light emitting element 30A has a sheet-like light emitting surface 35A, and irradiates planar light toward the flow path P4 by the light emitting surface 35A. For this reason, the irradiation area of light can be made large enough with respect to the area of the distribution route P4 seen from the light emitting element 30A side. As a result, the light is irradiated to the object to be measured over a wide range, so even if the concentration of the object to be measured is uneven, the influence is equalized. Moreover, the light receiving element 31A has a sheet-like light receiving surface 36A, and can receive planar measurement light at the light receiving surface 36A. For this reason, the light irradiated over a wide range by the light emitting element 30A is reliably detected. The light emitting element 30A is disposed on the inner wall surface 13A of the flow path P4. For this reason, the positional relationship between the light emitting element 30A and the flow path P4 is not easily deviated, and the light irradiation area of the light emitting element 30A does not easily move from the area set in advance. Moreover, since the light receiving element 31A is also disposed on the inner wall surface 13A of the flow path P4, the positional relationship between the light receiving element 31A and the light emitting element 30A and the flow path P4 is not easily deviated, and the light emitted by the light emitting element 30A is stabilized. Is detected. As described above, the optical measurement device 1A can improve the reliability of the measurement for the fluid whose concentration is nonuniform.

  The light measurement device 1A is electrically connected to the light emitting element 30A, is derived from the tubular member 10A, and is electrically connected to the power cable 32A for transmitting the power supplied to the light emitting element 30A and the light receiving element 31A. And a signal cable 33A for transmitting an output signal output from the light receiving element 31A. Thus, the power cable 32A and the signal cable 33A can be pulled out of the object to be measured in a state where the tubular member 10A is disposed in the object to be measured which is a fluid. Therefore, the optical measurement device 1A can easily perform the electrical connection and disconnection of the light emitting element 30A to the external power supply 45 and the like, and the electrical connection and disconnection of the light receiving element 31A to the processing device 46 and the like.

  In the light measurement device 1A, each of the light emitting element 30A and the light receiving element 31A includes an organic semiconductor. This makes it easy to form each of the light emitting element 30A and the light receiving element 31A in a large area. In addition, even when the inner wall surface 13A of the flow path P4 of the tubular member 10A is curved, the light measurement device 1A can reliably dispose the light emitting element 30A and the light receiving element 31A. In addition, the light measurement device 1A can dispose the light emitting element 30A and the light receiving element 31A by a method such as printing or spraying regardless of the shape of the inner wall surface 13A of the flow path P4 of the tubular member 10A. Further, in the light measurement device 1A, it is possible to reduce the manufacturing cost as compared to the light emitting element and the light receiving element of the inorganic type semiconductor.

  In the light measurement device 1A, each of the tubular member 10A, the light emitting element 30A, and the light receiving element 31A has flexibility. Thereby, the tubular member 10A having the light emitting element 30A and the light receiving element 31A disposed on the inner wall surface 13A enters, for example, a narrowly bent gap such as the inside of a living body or a structure while bending according to the inner shape of the gap can do. Therefore, the optical measurement device 1A can perform measurement even inside the narrowly bent gap.

  In the light measurement device 1A, the light emitting surface 35A extends from one end 24a to the other end 24b of the flow path P4, and the light receiving surface 36A extends from one end 24a to the other end 24b of the flow path P4. Thus, the light is irradiated to the object to be measured in a wider range, so that even if the concentration of the object to be measured is nonuniform, the influence is further leveled. Therefore, the optical measurement device 1A can further improve the reliability of the measurement for the fluid whose concentration is not uniform.

  The embodiments described above can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art.

  For example, in the first embodiment and the second embodiment, at least one of the light emitting element 30 or 30A and the light receiving element 31 or 31A may not include the organic semiconductor. Further, at least one of the tubular members 10 and 10A, the light emitting elements 30 and 30A, and the light receiving elements 31 and 31A may not have flexibility.

  Further, in the first and second embodiments, the outer frame portions 15 and 15A may not be cylindrical. For example, the outer frame portions 15 and 15A may have a rectangular cylindrical shape in which a cross section perpendicular to the extending direction exhibits a rectangular frame shape, and a triangular cylindrical shape having a triangular frame shape in cross section perpendicular to the extending direction. May be

  In the first and second embodiments, at least one of the power cables 32a, 32b, 32c, 32A and the signal cables 33a, 33b, 33c, 33A corresponds to the corresponding flow paths P1, P2, P3, P4. It may be derived | led-out from the tubular member 10, 10A via opening of other end 21b, 22b, 23b, 24b.

  Alternatively, at least one of the power cables 32a, 32b, 32c, 32A and the signal cables 33a, 33b, 33c, 33A may be formed from the tubular members 10, 10A through the minute through holes formed in the outer frame portions 15, 15A. It may be derived. According to this, the optical measurement devices 1 and 1A are less likely to inhibit the flow of the object to be measured in the flow paths P1, P2, P3 and P4.

  In the first and second embodiments, the optical measurement devices 1 and 1A may not include the power cables 32 and 32A, and may not include the signal cables 33 and 33A.

  Further, in the first embodiment, the partition portion 16 is not limited to the above-described shape. For example, the partition 16 may include two or more walls extending radially from the central axis of the outer frame 15 to the inner circumferential surface 25. Alternatively, the partition 16 may include a plurality of walls extending radially from the axis eccentric to the center axis of the outer frame 15 to the inner circumferential surface 25. Alternatively, the partition 16 may not have a radial cross section perpendicular to the extension direction of the partition 16. For example, the section 16 perpendicular to the extending direction of the partition portion 16 may have a lattice shape, or may have a honeycomb shape.

  Moreover, in the first embodiment, the light emitting element 30 and the light receiving element 31 may not necessarily be disposed in all the circulation paths.

  In the first embodiment, each of the light receiving elements 31a, 31b, and 31c has sufficient sensitivity to all wavelength regions of the wavelengths λ1, λ2, and λ3 of the light emitted by the light emitting elements 30a, 30b, and 30c. And a common element (element structure). However, each of the light receiving elements 31a, 31b, and 31c may be different elements (element structures) having sufficient sensitivity only for the respective wavelength regions of the wavelengths λ1, λ2, and λ3.

  DESCRIPTION OF SYMBOLS 1, 1A ... Optical measurement apparatus, 10, 10A ... Tubular member, 13, 13A ... Inner wall surface, 15, 15A ... Outer frame part, 16 ... Partition part, 17, 18, 19 ... Wall part, 25, 25A ... Inner periphery Surfaces 30, 30a, 30b, 30c, 30A: Light emitting elements 31, 31a, 31b, 31c, 31A: Light receiving elements 32, 32a, 32b, 32c, 32A: Power cables, 33, 33a, 33b, 33c, 33A ... Signal cable, P1, P2, P3, P4 ... Distribution channel, R ... Axis.

Claims (7)

A tubular member which defines a flow passage having one end and the other end opened by the inner wall surface, and the object to be measured which is a fluid can flow through the flow passage;
A light emitting element disposed in a partial region of the inner wall surface and emitting light toward the circulation path;
A light receiving element disposed in a partial region of the inner wall surface facing the light emitting element, detecting a measurement light according to the light irradiated by the light emitting element, and outputting an output signal according to the measurement light Equipped
The light emitting element has a sheet-like light emitting surface for emitting planar light;
The light receiving device is a light measuring device having a sheet-like light receiving surface capable of receiving planar measurement light. A power cable which is electrically connected to the light emitting element and which is derived from the tubular member and which transmits the power supplied to the light emitting element;
The optical measurement device according to claim 1, further comprising: a signal cable electrically connected to the light receiving element and that is derived from the tubular member and transmits the output signal output from the light receiving element.   The optical measurement device according to claim 1, wherein each of the light emitting element and the light receiving element includes an organic semiconductor.   The light measurement device according to any one of claims 1 to 3, wherein each of the tubular member, the light emitting element, and the light receiving element has flexibility. The light emitting surface extends from the one end to the other end of the flow path,
The light measurement device according to any one of claims 1 to 4, wherein the light receiving surface extends from the one end to the other end of the flow path. The tubular member defines a plurality of the flow paths by the inner wall surface,
The light measurement device according to any one of claims 1 to 5, wherein the light emitting elements disposed in each of the plurality of circulation paths emit light of different wavelengths toward the circulation paths. The tubular member is
A cylindrical outer frame,
A partition portion including a plurality of wall portions radially extending from an axis extending along the extending direction of the outer frame portion inside the outer frame portion to an inner peripheral surface of the outer frame portion;
The flow path is defined by the surfaces of a pair of the wall portions adjacent to each other and a region between the pair of the wall portions of the inner circumferential surface,
The light emitting element is disposed on the surface of the wall portion,
The light measurement device according to claim 6, wherein the light receiving element is disposed on the inner circumferential surface.

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