JP6979323B2 - Optical measuring device - Google Patents

Description

The present invention relates to an optical measuring device.

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

Special Table 2007-506978 Gazette Japanese Patent Publication No. 2011-513717

By the way, the concentration of the object to be measured, which is a fluid, may be non-uniform in the distribution channel. In this case, in the device as described above, since the light irradiation area is smaller than the area of the distribution path seen from the light emitting element side, when the light is irradiated to the region where the density of the object to be measured is high, and when the light is irradiated to the area to be measured. Output signals with different values are output depending on whether the area where the density of the object is low is irradiated with light. Further, in the above-mentioned device, since the light emitting element is arranged outside the distribution path, the positional relationship between the light emitting element and the distribution path tends to shift. Therefore, even if the light irradiation region of the light emitting element is adjusted in advance in consideration of the non-uniform density of the object to be measured, the positional relationship between the light emitting element and the distribution path shifts due to a slight external force or the like. As a result, the light irradiation 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 measuring device capable of improving the reliability of measurement for a fluid having a non-uniform concentration.

In the optical measuring device according to the present invention, a flow path in which one end and the other end are open is defined by an inner wall surface, and a tubular member capable of allowing an object to be measured as a fluid to flow through the flow path, and a part of the inner wall surface. A light emitting element that is arranged in a region and irradiates light toward a distribution path and a measurement light that is arranged in a part of the inner wall surface facing the light emitting element and that corresponds to the light emitted by the light emitting element are detected. A light receiving element that outputs an output signal corresponding to the measured light is provided, the light emitting element has a sheet-shaped light emitting surface that irradiates a planar light, and the light receiving element can receive the planar measured light. It has a sheet-like light receiving surface.

In this optical measuring device, a light emitting element and a light receiving element are arranged on the inner wall surface of a circulation path of a tubular member through which a fluid to be measured can flow. When the light emitting element irradiates the light toward the distribution path, the light receiving element detects the measured light corresponding to the irradiated light, and the output signal corresponding to the measured light is output from the light receiving element. Here, the light emitting element has a sheet-shaped light emitting surface, and the light emitting surface irradiates planar light toward the distribution path. Therefore, the light irradiation area can be sufficiently increased with respect to the area of the distribution path seen from the light emitting element side. As a result, the object to be measured is irradiated with light over a wide range, so that the effect is leveled even if the density of the object to be measured is non-uniform. Moreover, the light receiving element has a sheet-shaped light receiving surface, and can receive surface-shaped measurement light on the light receiving surface. Therefore, the light radiated over a wide range by the light emitting element is reliably detected. Further, the light emitting element is arranged on the inner wall surface of the distribution path. Therefore, the positional relationship between the light emitting element and the distribution path is unlikely to shift, and the light irradiation region of the light emitting element is difficult to move from a preset region. Moreover, since the light receiving element is also arranged on the inner wall surface of the distribution path, the positional relationship between the light receiving element and the light emitting element and the distribution path is not easily displaced, and the light emitted by the light emitting element is stably detected. As described above, this device can improve the reliability of measurement for a fluid having a non-uniform concentration.

The optical measuring device according to the present invention is electrically connected to a light emitting element and is derived from a tubular member to transmit power supplied to the light emitting element, and is electrically connected to a light receiving element and is tubular. A signal cable, which is derived from the member and transmits an output signal output by the light receiving element, may be provided. According to this, the power cable and the signal cable can be pulled out of the object to be measured with the tubular member arranged in the object to be measured which is a fluid. Therefore, this device can easily electrically connect and disconnect the light emitting element to the external power source and the like, and electrically connect and disconnect the light receiving element to the processing device and the like.

In the optical measuring device according to the present invention, each of the light emitting element and the light receiving element may include an organic semiconductor. This makes it easy to form each of the light emitting element and the light receiving element in a large area.

In the optical measuring 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 arranged on the inner wall surface enters a narrowly bent gap such as the inside of a living body or a structure while bending according to the internal shape of the gap. Can be done. Therefore, this device can measure even inside a narrowly bent gap.

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

In the optical measuring device according to the present invention, the tubular member defines a plurality of distribution paths by the inner wall surface, and the light emitting elements arranged in each of the plurality of distribution paths emit light having different wavelengths toward the distribution path. May be irradiated. According to this, this device can perform spectroscopic measurement of the object to be measured.

In the optical measuring device according to the present invention, the tubular member has a cylindrical outer frame portion and an axis extending inside the outer frame portion along the extending direction of the outer frame portion to the inner circumference of the outer frame portion. It has a partition including a plurality of walls extending radially to a surface, and a distribution path includes a surface of a pair of adjacent walls and a region of the inner peripheral surface between the pair of walls. The light emitting element may be arranged on the surface of the wall portion, and the light receiving element may be arranged on the inner peripheral surface. According to this, in the manufacturing process of the optical measuring device, the light receiving elements are collectively arranged on the inner peripheral surface of the outer frame portion, and then the partition portion in which the light emitting elements are arranged on the surface of the wall portion is placed outside the partition portion. It can be inserted into the frame. That is, in this device, it is not necessary to arrange the light receiving element on the inner wall surface in a separate process for each of the plurality of distribution paths. Therefore, this device can be manufactured by a simple method.

According to the present invention, it is possible to improve the reliability of measurement for a fluid having a non-uniform concentration.

FIG. 1 is a schematic perspective view of the optical measuring 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 one step of the manufacturing method of the optical measuring device shown in FIG. FIG. 4 is a diagram showing one step of the manufacturing method of the optical measuring device shown in FIG. FIG. 5 is a diagram showing one step of the manufacturing method of the optical measuring device shown in FIG. FIG. 6 is a diagram showing one step of the manufacturing method of the optical measuring device shown in FIG. FIG. 7 is a diagram showing one step of the manufacturing method of the optical measuring device shown in FIG. FIG. 8 is a diagram schematically showing an output signal according to the first embodiment. FIG. 9 is a diagram 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 diagram schematically showing an output signal according to the fourth embodiment. FIG. 12 is a schematic perspective view of the optical measuring 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 one step of the manufacturing method of the optical measuring device shown in FIG. FIG. 15 is a diagram showing one step of the manufacturing method of the optical measuring device shown in FIG. FIG. 16 is a diagram showing one step of the manufacturing method of the optical measuring device shown in FIG.

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

[First Embodiment]
[Configuration of optical measuring device]
FIG. 1 is a schematic perspective view of the optical measuring device 1 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. The optical measuring device 1 shown in FIGS. 1 and 2 irradiates light toward the object to be measured, which is a fluid (liquid, gas, etc.), and measures light output from the object to be measured according to the irradiated light. Is a measuring device that detects and outputs an output signal corresponding to the measured light. For example, the optical measuring device 1 can measure the absorbance (or light transmittance) of the object to be measured by detecting the light transmitted through the object to be measured as the measurement light. The optical measuring device 1 can simultaneously perform measurement with a plurality of (three in this case) light having different wavelengths λ1, λ2, and λ3. The optical measuring 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 a long member constituting the main body portion of the optical measuring device 1. In the tubular member 10, a plurality of distribution paths P1, P2, and P3 having one end and the other end open (three in this case corresponding to the number of wavelengths that can be measured) are defined by the inner wall surface 13. There is. One end of each of the distribution channels P1, P2, P3 is open to one end surface in the extending direction of the tubular member 10, and the other end of each of the distribution paths P1, P2, P3 is in the extending direction of the tubular member 10. It is open to the other end surface of the above. Each of the distribution channels P1, P2, and P3 is continuous from one end to the other end. The tubular member 10 is composed of, for example, a fluororesin such as polyethylene, polypropylene, vinyl chloride, or polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforced plastic). The tubular member 10 has flexibility and can be bent by receiving an external force.

The tubular member 10 is configured so that the 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 outside the distribution path P1 from either the one end 21a or the other end 21b. Come out to. Further, 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 passes through the distribution path P2 from either the one end 22a or the other end 22b. Go out of. 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 passes through the distribution path P3 from either the one end 23a or the other end 23b. Go out of. While the object to be measured is located in the distribution channels P1, P2, P3, for example, the absorbance is measured.

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 portion 16 is located inside the outer frame portion 15, and divides the cavity inside the outer frame portion 15 into a plurality of (here, three) distribution channels P1, P2, and P3. A plurality of partition portions 16 extend radially from the axis R extending along the extending direction of the outer frame portion 15 to the inner peripheral surface 25 of the outer frame portion 15 inside the outer frame portion 15 (in terms of the number of distribution routes). Correspondingly, it is configured to include the wall portions 17, 18 and 19 of 3) here. Here, the axis R is the central axis of the outer frame portion 15 in the extending direction of the outer frame portion 15, but the axis R is not limited to the central axis of the outer frame portion 15. Further, here, the wall portions 17, 18 and 19 are arranged at equal angles (120 degrees) to each other, but the angles formed by the wall portions 17, 18 and 19 do not have to be equal to each other.

As described above, the tubular member 10 defines the distribution channels P1, P2, and P3 by the inner wall surface 13. The inner wall surface 13 of the tubular member 10 has, for example, the surfaces 25a, 25b, 25c of the inner peripheral surface 25 of the outer frame portion 15, the surfaces 27a, 27b, and the wall portion located on the back surfaces of the wall portion 17 included in the partition portion 16. It is composed of surfaces 28a and 28b located on the back surfaces of 18 and surfaces 29a and 29b located on the back surfaces of the wall portion 19.

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

The pair of wall portions 18, 19 are adjacent to each other. The region 25b of the inner peripheral surface 25 of the outer frame portion 15 is a region between the pair of wall portions 18 and 19 of the inner peripheral surface 25. The surface 28a of the wall portion 18, the surface 29b of the wall portion 19, and the region 25b of the inner peripheral surface 25 define the distribution path P2.

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

The light emitting element 30 is an element that is arranged in a part of the inner wall surface 13 and irradiates light toward a distribution path. The light emitting element 30 is formed in a large area and has a sheet-shaped light emitting surface 35 extending from one end to the other end of the distribution path. The light emitting element 30 irradiates the light emitting surface 35 with planar light toward the distribution path. 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, a cyclopentadiene derivative, a carbazole derivative, a triphenylamine derivative, a quinoline complex, a thiadiazol complex, a phenylpyridine complex, an oxadiazole complex, a phenylbenzoimidazole complex, a polyparaphenylene vinylene derivative, and the like. It may be a polyparaphenylene derivative, a polysilane derivative, or a polythiophene derivative. The light emitting element 30 has flexibility and can be bent by receiving an external force. The light emitting element 30 is composed of light emitting elements 30a, 30b, and 30c capable of irradiating light having different wavelengths from each other.

The light emitting element 30a can irradiate light having a wavelength of λ1. The light emitting element 30a is arranged in the distribution path P1. More specifically, the light emitting element 30a is arranged on the surface 27a of the wall portion 17 and the surface 28b of the wall portion 18. The light emitting element 30a has a sheet-shaped light emitting surface 35a extending from one end 21a of the distribution path P1 to the other end 21b. The light emitting element 30a irradiates light in a plane toward the distribution path P1 by the light emitting surface 35a. As a result, the light emitting element 30a can irradiate a wide range (for example, the entire area or substantially the entire area) of the distribution path P1 as seen from the light emitting element 30a side toward the distribution path P1.

The light emitting element 30b can irradiate light having a wavelength of λ2. The light emitting element 30b is arranged in the distribution path P2. More specifically, the light emitting element 30b is arranged on the surface 28a of the wall portion 18 and the surface 29b of the wall portion 19. The light emitting element 30b has a sheet-shaped light emitting surface 35b extending from one end 22a to the other end 22b of the distribution path P2. The light emitting element 30b irradiates light in a plane toward the distribution path P2 by the light emitting surface 35b. As a result, the light emitting element 30b can irradiate a wide range (for example, the entire area or substantially the entire area) of the distribution path P2 as seen from the light emitting element 30b side toward the distribution path P2.

The light emitting element 30c can irradiate light having a wavelength of λ3. The light emitting element 30c is arranged in the distribution path P3. More specifically, the light emitting element 30c is arranged on the surface 29a of the wall portion 19 and the surface 27b of the wall portion 17. The light emitting element 30c has a sheet-shaped light emitting surface 35c extending from one end 23a to the other end 23b of the distribution path P3. The light emitting element 30c irradiates light in a plane toward the distribution path P3 by the light emitting surface 35c. As a result, the light emitting element 30c can irradiate a wide range (for example, the entire area or substantially the entire area) of the distribution path P3 as seen from the light emitting element 30c side toward the distribution path P3.

The light receiving element 31 is arranged in a part of the inner wall surface 13 facing the light emitting element 30, detects the measured light corresponding to the light emitted by the light emitting element 30, and outputs the output signal corresponding to the measured light. It is an element. The light receiving element 31 is formed in a large area and has a sheet-shaped light receiving surface 36 extending from one end to the other end of the distribution path. The light receiving element 31 can receive a 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 a skeleton derived from, for example, thiophene, benzothiophene, phenylene vinylene, carbazole, thienopyrol, diketopyrrolopyrrole, and at least one compound selected from the group consisting of derivatives thereof. It may be a compound. The light receiving element 31 has flexibility and can be bent by receiving an external force. The light receiving element 31 is composed of light receiving elements 31a, 31b, 31c.

Here, the "region of the inner wall surface facing the light emitting element" means a region of the inner wall surface in a state of 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 surface faces the light emitting element at an angle of 0 degrees means a state in which the inner wall surface and the light emitting element face each other so as to be parallel to each other. Further, for example, a state in which the region of the inner wall surface faces the light emitting element at an angle of 90 degrees means a state in which the inner wall surface and the light emitting element are orthogonal to each other. In other words, the "region of the inner wall surface facing the light emitting element" is the region of the inner wall surface at a position where the light emitted by the light emitting element (or the measured light corresponding to the light) can be directly received. Is.

The light receiving element 31a is arranged in the distribution path P1. More specifically, the light receiving element 31a is arranged in the region 25a of the inner peripheral surface 25 facing the light emitting element 30a. The light receiving element 31a has a sheet-shaped light receiving surface 36a extending from one end 21a of the distribution path P1 to the other end 21b. The light receiving element 31a can receive a planar measurement light on the light receiving surface 36a. As a result, the light receiving element 31a covers the entire area or substantially the entire area of the distribution path P1 seen from the light emitting element 30a side toward the distribution path P1 by the light irradiated in a plane by the light emitting element 30a (that is, the light emitting element 30a. It is possible to detect the measured light according to the irradiated light).

The light receiving element 31b is arranged in the distribution path P2. More specifically, the light receiving element 31b is arranged in the region 25b of the inner peripheral surface 25 facing the light emitting element 30b. The light receiving element 31b has a sheet-shaped light receiving surface 36b extending from one end 22a to the other end 22b of the distribution path P2. The light receiving element 31b can receive a planar measurement light on the light receiving surface 36b. As a result, the light receiving element 31b covers the entire area or substantially the entire area of the distribution path P2 as seen from the light emitting element 30b side toward the distribution path P2 by the light irradiated in a plane by the light emitting element 30b (that is, the light emitting element 30b. It is possible to detect the measured light according to the irradiated light).

The light receiving element 31c is arranged in the distribution path P3. More specifically, the light receiving element 31c is arranged in the region 25c of the inner peripheral surface 25 facing the light emitting element 30c. The light receiving element 31c has a sheet-shaped light receiving surface 36c extending from one end 23a to the other end 23b of the distribution path P3. The light receiving element 31c can receive a planar measurement light on the light receiving surface 36c. As a result, the light receiving element 31c covers the entire area or substantially the entire area of the distribution path P3 as seen from the light emitting element 30c side toward the distribution path P3 by the light irradiated in a plane by the light emitting element 30c (that is, the light emitting element 30c. It is possible to detect the measured 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 derived from the tubular member 10 (that is, pulled out from the tubular member 10) to transmit electric 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 distribution path P1, and is led out from the tubular member 10 through the opening of the one end 21a of the distribution path P1. The power cable 32b is connected to the light emitting element 30b in the vicinity of one end 22a in the distribution path P2, and is led out from the tubular member 10 through the opening of the one end 22a of the distribution path P2. The power cable 32c is connected to the light emitting element 30c in the vicinity of one end 23a in the distribution path P3, and is led out from the tubular member 10 through the opening of the one end 23a of the distribution path P3.

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

The signal cable 33 is a cable that is electrically connected to the light receiving element 31 and is derived from the tubular member 10 (that is, pulled out from the tubular member 10) 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 distribution path P1, and is led out from the tubular member 10 through the opening of the one end 21a of the distribution path P1. The signal cable 33b is connected to the light receiving element 31b in the vicinity of one end 22a in the distribution path P2, and is led out from the tubular member 10 through the opening of the one end 22a of the distribution path P2. The signal cable 33c is connected to the light receiving element 31c in the vicinity of one end 23a in the distribution path P3, and is led out from the tubular member 10 through the opening of the one end 23a of the distribution path P3.

Each of the signal cables 33a, 33b, 33c is electrically connected to a processing device 46 that inputs an output signal and processes the input signal. In addition, each of the signal cables 33a, 33b, 33c may be electrically connected to a storage device for inputting an output signal and storing information regarding the output signal, instead of the processing device 46. Further, each of the signal cables 33a, 33b, 33c may be connected to a processing device 46 separate from each other or a storage device separate from each other.

[Manufacturing method of optical measuring device]
An example of the manufacturing method of the optical measuring device 1 will be described. 3 to 7 are diagrams showing one step of the manufacturing method of the optical measuring device 1 shown in FIG. 1. In this method, first, as shown in FIG. 3, a rectangular flat plate-shaped first substrate 50 for the outer frame portion 15 is prepared (first step). Hereinafter, for convenience of explanation, in a plan view, the length of the first substrate 50 in the x-axis direction along the side of the first substrate 50 is X, and the length in the y-axis direction orthogonal to the x-axis direction is Y. It is assumed that it is formed as follows. The first substrate 50 is configured to contain, for example, a fluororesin such as polyethylene, polypropylene, vinyl chloride, polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforced plastic), and is flexible. Have.

Subsequently, the sheet-shaped light receiving element 31 is arranged on one surface 51 of the first substrate 50 (second step). More specifically, the non-arranged area 54a, the arranged area 55a, and the non-arranged area 54b are arranged 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 light receiving element 31 is arranged so that the strip-shaped regions are arranged in the order of the region 55b, the non-arranged region 54c, and the arranged region 55c. The "non-arranged region" is an region in which the light receiving element 31 is not arranged. The "arrangement area" is an area in which a light receiving element is arranged. The boundary line between each non-placed area and each placed area adjacent to the non-placed area is parallel to the y-axis direction. The lengths of the non-arranged regions in the x-axis direction are equal to each other, and the lengths of the arranged regions in the x-axis direction are equal to each other.

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

The light receiving elements 31a, 31b, 31c are attached to one surface 51 by, for example, spin coating, a liquid quantitative discharge method (dispenser), an inkjet printing method, a spray method, a vacuum vapor deposition method, or a method of immersing the first substrate 50 in a liquid phase. Be placed. For example, when the above-mentioned method is executed with the non-arranged regions 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 X and a length in the y-axis direction Y larger in plan view 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 X 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 on the inside, and one side 52 and the other side 53 of the first substrate 50 are joined. (Third step). One side 52 and the other side 53 of the first substrate are joined to each other by, for example, an adhesion method or a heat fusion method. As a result, a cylindrical outer frame portion 15 in which the light receiving elements 31a, 31b, and 31c are arranged is formed on the inner peripheral surface 25.

Subsequently, as shown in FIG. 5, a rectangular flat plate-shaped second substrate 60, a third substrate 70, and a fourth substrate 80 for the partition portion 16 are prepared (fourth step). In the plan view, the length of the second substrate 60, the third substrate 70, and the fourth substrate 80 in the x-axis direction along the side of each substrate is the X / circumferential ratio (that is, the inner diameter of the outer frame portion 15). It is formed so that the length in the y-axis direction orthogonal to the x-axis direction is 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, for example, a fluororesin such as polyethylene, polypropylene, vinyl chloride, polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforced plastic). ) Is included and has flexibility.

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

More specifically, on one surface 61 of the second substrate 60, at least a part of the region in the y-axis direction (here, the entire region in the y-axis direction) and the entire region in the x-axis direction (or substantially the entire region). , A light emitting element 30a capable of irradiating light having a wavelength λ1 is arranged. The region where the light emitting element 30a is arranged on one surface 61 is a region 61a corresponding to the surface 27a of the wall portion 17 of the partition portion 16 in the optical measuring device 1 and a region 61b corresponding to the surface 28b of the wall portion 18. be.

Further, on one surface 71 of the third substrate 70, the wavelength λ2 covers at least a part of the region in the y-axis direction (here, the entire region in the y-axis direction) and the entire region in the x-axis direction (or substantially the entire region). A light emitting element 30b capable of irradiating the light of the above is arranged. The region where the light emitting element 30b is arranged on one surface 71 is a region 71a corresponding to the surface 28a of the wall portion 18 of the partition portion 16 in the optical measuring device 1 and a region 71b corresponding to the surface 29b of the wall portion 19. be.

Further, on one surface 81 of the fourth substrate 80, the wavelength λ3 is covered in at least a part of the region in the y-axis direction (here, the entire region in the y-axis direction) and the entire region in the x-axis direction (or substantially the entire region). A light emitting element 30c capable of irradiating the light of the above is arranged. The region where the light emitting element 30c is arranged on one surface 81 is a region 81a corresponding to the surface 29a of the wall portion 19 of the partition portion 16 in the optical measuring device 1 and a region 81b corresponding to the surface 27b of the wall portion 17. be.

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

In the fourth step, the second substrate 60, the third substrate 70, and the fourth substrate, whose length in the x-axis direction is X / circumference ratio and whose length in the y-axis direction is larger in plan view than a rectangle of Y, are present. A substrate 80 is prepared, and after the fifth step, the second substrate 60, the third substrate 70, and the fourth substrate 80 have a length of X / circumference in the x-axis direction and a length of Y in the y-axis direction. You may cut it so that it becomes 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 one surface 81 of the fourth substrate 80 is bonded to each other to form a 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, an adhesive method or a heat fusion method.

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

The order of the above-mentioned 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 executed first. , The steps from the first step to the third step may be executed later.

Subsequently, as shown in FIG. 7, the partition 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 partition portion 16 is provided on the outer frame portion 15 so that the wall portions 17, 18 and 19 of the partition portion 16 abut on the non-arranged regions 54a, 54b and 54c on the inner peripheral 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, an adhesive method or a heat fusion 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 (step 8). The light emitting elements 30a, 30b, 30c and the power cables 32a, 32b, 32c are connected by, for example, soldering or crimping. Further, 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 (9th step). The light receiving elements 31a, 31b, 31c and the signal cables 33a, 33b, 33c are connected by, for example, soldering or crimping. As described above, the optical measuring device 1 is manufactured (see FIG. 1).

[Example]
FIG. 8 is a diagram schematically showing an output signal according to the first embodiment. In FIG. 8, the horizontal axis shows the wavelength of the light emitted by the light emitting element 30, and the vertical axis shows the intensity of the output signal output by the light receiving element 31. In the optical measuring device 1 according to the first embodiment, the light emitting element 30a irradiates light having a wavelength λ1. Further, the light emitting element 30b irradiates light having a wavelength λ2 having a wavelength longer than the wavelength λ1. Further, the light emitting element 30c irradiates light having a wavelength λ3 having a wavelength longer than the wavelength λ2.

The output signal diagram of FIG. 8 schematically shows an output signal under the condition that air is flowing in the distribution 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 in its intensity. The intensity of each output signal under this condition is set to "1", which is a reference value. A reference value for the strength of each output signal may be set based on the output signal under the condition that the inside of the distribution paths P1, P2, and P3 is in a vacuum state.

FIG. 9 is a diagram 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 having a wavelength of λ2 is circulated in the distribution paths P1, P2, and P3 as an object to be measured. It is a point where the output signal in is shown schematically. From FIG. 9, it can be seen that the light having the wavelength λ1 and the light having the wavelength λ3 are not absorbed by the object to be measured, while the light having the 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 difference between the output signal diagram of FIG. 10 and the output signal diagram of FIG. 9 is that the wavelength λ3 is added to the fluid that selectively absorbs the light of the wavelength λ2 as the object to be measured in the distribution paths P1, P2, and P3. The point is that the output signal is schematically shown under the condition that the fluid that selectively absorbs the light of the above is circulated as an impurity. From FIG. 10, it can be seen that in addition to the light having the wavelength λ2, the light having the wavelength λ3 is also absorbed. As shown in FIGS. 9 and 10, according to the optical measuring device 1, the light selectively absorbed as an impurity in the object to be measured, in addition to the fluid whose wavelength of the light selectively absorbed is known in advance. It is possible to determine whether or not another type of fluid whose wavelength is known in advance is contained.

FIG. 11 is a diagram schematically showing an output signal according to the fourth embodiment. The difference between the output signal diagram of FIG. 11 and the output signal diagram of FIG. 9 is that the output signal is under the condition that a mixed fluid of three kinds of fluids is distributed as an object to be measured in the distribution paths P1, P2, and P3. Is a point schematically shown. For each fluid contained in the mixed fluid, the degree of absorption of light having a wavelength λ1, light having a wavelength λ2, and light having a wavelength λ3 is measured in advance. Then, the mixing ratio of each fluid is calculated from the output signal of FIG. 11 based on the degree of absorption measured in advance. Therefore, according to the optical measuring device 1, the mixing ratio of each fluid contained in the object to be measured, which is a mixed fluid, can be detected.

[Action and effect]
In the optical measuring device 1, the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c are arranged on the inner wall surface 13 of the distribution paths P1, P2, P3 of the tubular member 10 through which the object to be measured as a fluid can flow. ing. When light is irradiated toward the distribution paths P1, P2, P3 by the light emitting elements 30a, 30b, 30c, the measurement light corresponding to the irradiated light is detected by the light receiving elements 31a, 31b, 31c, and the measurement light is used. The corresponding output signal is output from the light receiving elements 31a, 31b, 31c. Here, the light emitting elements 30a, 30b, 30c have sheet-shaped light emitting surfaces 35a, 35b, 35c, and the light emitting surfaces 35a, 35b, 35c irradiate the light emitting surfaces P1, P2, P3 with planar light. do. Therefore, the light irradiation area can be sufficiently increased with respect to the areas of the distribution paths P1, P2, and P3 seen from the light emitting elements 30a, 30b, and 30c sides. As a result, the object to be measured is irradiated with light over a wide range, so that the effect is leveled even if the density of the object to be measured is non-uniform. Moreover, the light receiving elements 31a, 31b, 31c have sheet-shaped light receiving surfaces 36a, 36b, 36c, and the light receiving surfaces 36a, 36b, 36c can receive surface-shaped measurement light. Therefore, the light irradiated over a wide range by the light emitting elements 30a, 30b, and 30c is reliably detected. Further, the light emitting elements 30a, 30b, and 30c are arranged on the inner wall surface 13 of the distribution paths P1, P2, and P3. Therefore, the positional relationship between the light emitting elements 30a, 30b, 30c and the distribution paths P1, P2, P3 is unlikely to shift, and the light irradiation region of the light emitting elements 30a, 30b, 30c is difficult to move from the preset region. Moreover, since the light receiving elements 31a, 31b, 31c are also arranged on the inner wall surface 13 of the distribution paths P1, P2, P3, the light receiving elements 31a, 31b, 31c, the light emitting elements 30a, 30b, 30c, and the distribution paths P1, P2, The positional relationship with P3 is not easily displaced, and the light emitted by the light emitting elements 30a, 30b, and 30c is stably detected. As described above, the optical measuring device 1 can improve the reliability of measurement for a fluid having a non-uniform concentration.

The optical measuring device 1 is electrically connected to the light emitting elements 30a, 30b, 30c and is led out from the tubular member 10, and the power cables 32a, 32b, 32c for transmitting the electric power supplied to the light emitting elements 30a, 30b, 30c. And the signal cables 33a, 33b, 33c that are electrically connected to the light receiving elements 31a, 31b, 31c and are derived from the tubular member 10 and transmit the output signal output by the light receiving elements 31a, 31b, 31c. I have. As a result, the power cables 32a, 32b, 32c and the signal cables 33a, 33b, 33c can be pulled out of the measured object with the tubular member 10 arranged in the fluid object to be measured. Therefore, the optical measuring device 1 electrically connects and disconnects the light emitting elements 30a, 30b and 30c to the external power source 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 optical measuring device 1, each of the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c contains an organic semiconductor. This makes it easy to form each of the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c in a large area. Further, the optical measuring device 1 reliably provides the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c even when the inner wall surface 13 of the distribution paths P1, P2, P3 of the tubular member 10 is curved. Can be placed. Further, the optical measuring device 1 has the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b by, for example, printing, spraying, or the like, regardless of the shape of the inner wall surface 13 of the distribution paths P1, P2, P3 of the tubular member 10. , 31c can be arranged. Further, in the optical measuring 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 semiconductor.

In the optical measuring device 1, each of the tubular member 10, the light emitting elements 30a, 30b, 30c, and the light receiving elements 31a, 31b, 31c has flexibility. As a result, the tubular member 10 in which the light emitting elements 30a, 30b, 30c and the light receiving elements 31a, 31b, 31c are arranged on the inner wall surface 13 is placed inside the gap in a narrowly bent gap such as inside a living body or a structure. You can enter while bending according to the shape. Therefore, the optical measuring device 1 can perform measurement even inside a narrowly bent gap.

In the optical measuring device 1, the light emitting surfaces 35a, 35b, 35c extend from one ends 21a, 22a, 23a of the distribution paths P1, P2, P3 to the other ends 21b, 22b, 23b, and the light receiving surfaces 36a, 36b, 36c extend. , It extends from one end 21a, 22a, 23a of the distribution channels P1, P2, P3 to the other ends 21b, 22b, 23b. As a result, the object to be measured is irradiated with light over a wider range, so that even if the density of the object to be measured is non-uniform, the effect is further leveled. Therefore, the optical measuring device 1 can further improve the reliability of measurement for a fluid having a non-uniform concentration.

In the optical measuring device 1, the tubular member 10 defines a plurality of distribution paths P1, P2, P3 by the inner wall surface 13, and the light emitting elements 30a, 30b, which are arranged in each of the plurality of distribution paths P1, P2, P3. 30c irradiates light having different wavelengths toward the distribution channels P1, P2, and P3. As a result, the optical measuring device 1 can perform spectroscopic measurement of the object to be measured.

In the optical measuring device 1, the tubular member 10 has an outer frame portion 15 from a cylindrical outer frame portion 15 and an axis line R extending inside the outer frame portion 15 along the extending direction of the outer frame portion 15. It has a partition portion 16 including a plurality of wall portions 17, 18 and 19 extending radially to the inner peripheral surface 25 of the distribution path P1 and the surfaces 27a and 28b of a pair of wall portions 17 and 18 adjacent to each other. , The area 25a between the pair of wall portions 17 and 18 of the inner peripheral surface 25, and the distribution path P2 is inside the surfaces 28a and 29b of the pair of wall portions 18 and 19 adjacent to each other. The area 25b between the pair of wall portions 18 and 19 of the peripheral surface 25 is defined, and the distribution path P3 is formed by the surfaces 29a and 27b of the pair of wall portions 19 and 17 adjacent to each other and the inner peripheral surface. The light emitting element 30a is arranged on the surface 27a of the wall portion 17 and the surface 28b of the wall portion 18, and the light emitting element 30b is defined by a region 25c between the pair of the wall portions 19 and 17 of the 25. The light emitting element 30c is arranged on the surface 28a of the wall portion 18 and the surface 29b of the wall portion 19, the light emitting element 30c is arranged on the surface 29a of the wall portion 19 and the surface 27b of the wall portion 17, and the light receiving element 31a is a region of the inner peripheral surface 25. The light receiving element 31b is arranged in the area 25a, the light receiving element 31b is arranged in the region 25b of the inner peripheral surface 25, and the light receiving element 31c is arranged in the region 25c of the inner peripheral surface 25. As a result, in the manufacturing process of the optical measuring device 1, the light receiving elements 31a, 31b, 31c are collectively arranged on the inner peripheral surface 25 of the outer frame portion 15, and then on each surface of the wall portions 17, 18 and 19. The partition portion 16 in which the light emitting elements 30a, 30b, and 30c are arranged can be inserted into the outer frame portion 15. That is, in the optical measuring device 1, it is not necessary to arrange the light receiving elements 31a, 31b, 31c on the inner wall surface 13 in separate steps for each of the plurality of distribution paths P1, P2, P3. Therefore, the optical measuring device 1 can be manufactured by a simple method.

[Second Embodiment]
[Configuration of optical measuring device]
FIG. 12 is a schematic perspective view of the optical measuring 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 difference between the optical measuring device 1A according to the second embodiment and the optical measuring device 1 according to the first embodiment is that the tubular member 10A has one distribution path P4 due to the inner wall surface 13A. The light emitting element 30A irradiates light having a single wavelength λ4 toward the distribution path P4. Hereinafter, the configuration of the optical measuring device 1A will be mainly described as being different from the configuration of the optical measuring device 1. The optical measuring 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 constituting the main body portion of the optical measuring device 1A. One distribution path P4 with one end 24a and the other end 24b open is defined by the inner wall surface 13A. One end 24a of the distribution path P4 is open to one end surface of the tubular member 10A in the extending direction, and the other end 24b of the distribution path P4 is open to the other end surface of the tubular member 10A in the extending direction. The distribution channel P4 is continuous from one end 24a to the other end 24b. The tubular member 10A is composed of, for example, a fluororesin such as polyethylene, polypropylene, vinyl chloride, or polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforced plastic). The tubular member 10A has flexibility and can be bent by receiving an external force.

The tubular member 10A is configured so that the object to be measured, which is a fluid, can flow through 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 outside the distribution path P4 from either the one end 24a or the other end 24b. Come out to. While the object to be measured is located in the distribution channel P4, for example, the absorbance is measured.

The tubular member 10A has an outer frame portion 15A. The inner wall surface 13A of the tubular member 10A is composed of, for example, regions 25d and 25e of the inner peripheral surface 25A of the outer frame portion 15A. The region 25d is one region of the inner peripheral surface 25A divided into two by a plane including the central axis of the tubular member 10A, and the region 25e is the other region. The tubular member 10A does not have a partition.

The light emitting element 30A can irradiate light having a wavelength of λ4. The light emitting element 30A is arranged in the distribution path P4. The light emitting element 30A is arranged in a part of the inner wall surface 13A. More specifically, the light emitting element 30A is arranged in the region 25d of the inner peripheral surface 25A of the outer frame portion 15A. The light emitting element 30A has a sheet-shaped light emitting surface 35A extending from one end 24a to the other end 24b of the distribution path P4, and irradiates the light emitting surface P4 with planar light. As a result, the light emitting element 30A can irradiate a wide range (for example, the entire area or substantially the entire area) of the distribution path P4 as seen from the light emitting element 30A side toward the distribution path P4.

The light receiving element 31A is arranged in the distribution path P4. The light receiving element 31A is arranged in a part of the inner wall surface 13A facing the light emitting element 30A. More specifically, the light receiving element 31A is arranged in the region 25e of the inner peripheral surface 25A of the outer frame portion 15A. The light receiving element 31A has a sheet-shaped light receiving surface 36A extending from one end 24a to the other end 24b of the distribution path P4, and can receive surface-shaped measurement light. As a result, the light receiving element 31A is irradiated with the light radiated in a plane by the light emitting element 30A (that is, the light emitting element 30A irradiates substantially the entire area of the distribution path P4 as seen from the light emitting element 30A side toward the distribution path P4. It is possible to detect the measured light according to the light).

The power cable 32A is a cable that is electrically connected to the light emitting element 30A and is derived from the tubular member 10A (that is, pulled out from the tubular member 10A) to transmit electric 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 distribution path P4, and is led out from the tubular member 10A through the opening of the one end 24a of the distribution path P4. The power cable 32A is electrically connected to the external power source 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) and transmits an output signal output by 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 distribution path P4, and is led out from the tubular member 10A through the opening of the one end 24a of the distribution path P4. The signal cable 33A is electrically connected to the processing device 46, the storage device, or the like.

[Manufacturing method of optical measuring device]
An example of the manufacturing method of the optical measuring device 1A will be described. 14 to 16 are diagrams showing one step of the manufacturing method of the optical measuring device 1A shown in FIG. 12. In this method, first, as shown in FIG. 14, a rectangular flat plate-shaped fifth substrate 90 and sixth substrate 100 for the outer frame portion 15A are prepared (step 10). In the plan view, the length of each of the fifth substrate 90 and the sixth substrate 100 is X along the side of each substrate, and the length in the y-axis direction orthogonal to the x-axis direction is Y / 2. It is formed to be. Each of the fifth substrate 90 and the sixth substrate 100 contains, for example, a fluororesin such as polyethylene, polypropylene, vinyl chloride, polytetrafluoroethylene, a plastic material such as polyethylene terephthalate, or a part of FRP (reinforced plastic). It is constructed and has flexibility.

Subsequently, the sheet-shaped light emitting element 30A is arranged over the entire area (or substantially the entire area) of one surface 91 of the fifth substrate 90 (step 11). The region where the light emitting element 30A is arranged on one surface 91 is a region 91a corresponding to the region 25d of the inner peripheral surface 25A of the outer frame portion 15A in the optical measuring device 1A.

Subsequently, the sheet-shaped light receiving element 31A is arranged in the arrangement region 105 set in the entire area (or substantially the entire area) of one surface 101 of the sixth substrate 100 (step 12). In the optical measuring device 1A, the arrangement region 105 corresponds to the region 25e of the inner peripheral surface 25A of the outer frame portion 15A.

In the tenth step, a fifth substrate 90 having a length in the x-axis direction of X and a length in the y-axis direction of Y / 2 larger in plan view was prepared, and after the eleventh step, the said substrate 90 was prepared. The fifth substrate 90 may be cut so that the length in the x-axis direction is X and the length in the y-axis direction is Y / 2. Further, in the tenth step, a sixth substrate 100 having a length in the x-axis direction of X and a length in the y-axis direction of Y / 2 larger in plan view is prepared, and after the twelfth step, the sixth substrate 100 is prepared. The sixth substrate 100 may be cut so that the length in the x-axis direction is X 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 are arranged so that one surface 91 of the fifth substrate 90 and one surface 101 of the sixth substrate 100 are on the inside. The other side 103 is joined, and the other side 93 of the fifth substrate 90 and one side 102 of the sixth board 100 are joined (step 13). One side 92 and the other side 93 of the fifth substrate 90 are a pair of sides facing each other in the x-axis direction. One 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. As a result, as shown in FIG. 16, a cylindrical outer frame portion 15A in which the light emitting element 30A and the light receiving element 31A are arranged is formed on the inner peripheral surface 25A.

Subsequently, the power cable 32A is connected to the light emitting element 30A (14th step). Further, the signal cable 33A is connected to the light receiving element 31A (15th step). As a result, the optical measuring device 1A is manufactured (see FIG. 12).

[Action and effect]
In the optical measuring device 1A, the light emitting element 30A and the light receiving element 31A are arranged on the inner wall surface 13A of the flow path P4 of the tubular member 10A through which the object to be measured as a fluid can flow. When the light emitting element 30A irradiates the light in a plane toward the distribution path P4, the light receiving element 31A detects the measured light corresponding to the irradiated light, and the output signal corresponding to the measured light is transmitted from the light receiving element 31A. It is output. Here, the light emitting element 30A has a sheet-shaped light emitting surface 35A, and the light emitting surface 35A irradiates planar light toward the distribution path P4. Therefore, the light irradiation area can be sufficiently increased with respect to the area of the distribution path P4 seen from the light emitting element 30A side. As a result, the object to be measured is irradiated with light over a wide range, so that the effect is leveled even if the density of the object to be measured is non-uniform. Moreover, the light receiving element 31A has a sheet-shaped light receiving surface 36A, and can receive surface-shaped measurement light on the light receiving surface 36A. Therefore, the light irradiated over a wide range by the light emitting element 30A is reliably detected. Further, the light emitting element 30A is arranged on the inner wall surface 13A of the distribution path P4. Therefore, the positional relationship between the light emitting element 30A and the distribution path P4 is unlikely to shift, and the light irradiation region of the light emitting element 30A is difficult to move from a preset region. Moreover, since the light receiving element 31A is also arranged on the inner wall surface 13A of the distribution path P4, the positional relationship between the light receiving element 31A and the light emitting element 30A and the distribution path P4 is not easily displaced, and the light emitted by the light emitting element 30A is stable. Is detected. As described above, the optical measuring device 1A can improve the reliability of measurement for a fluid having a non-uniform concentration.

The optical measuring device 1A is electrically connected to the light emitting element 30A and is led out 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. It also includes a signal cable 33A, which is derived from the tubular member 10A and transmits an output signal output by the light receiving element 31A. As a result, the power cable 32A and the signal cable 33A can be pulled out of the object to be measured while the tubular member 10A is arranged in the object to be measured which is a fluid. Therefore, the optical measuring device 1A can easily electrically connect and disconnect the light emitting element 30A to the external power source 45 and the like, and electrically connect and disconnect the light receiving element 31A to the processing device 46 and the like.

In the optical measuring device 1A, each of the light emitting element 30A and the light receiving element 31A contains 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. Further, the optical measuring device 1A can reliably arrange the light emitting element 30A and the light receiving element 31A even when the inner wall surface 13A of the distribution path P4 of the tubular member 10A is curved. Further, in the optical measuring device 1A, the light emitting element 30A and the light receiving element 31A can be arranged by a method such as printing or spraying, regardless of the shape of the inner wall surface 13A of the distribution path P4 of the tubular member 10A. Further, in the optical measuring device 1A, it is possible to reduce the manufacturing cost as compared with the light emitting element and the light receiving element of the inorganic semiconductor.

In the optical measuring device 1A, each of the tubular member 10A, the light emitting element 30A, and the light receiving element 31A has flexibility. As a result, the tubular member 10A in which the light emitting element 30A and the light receiving element 31A are arranged on the inner wall surface 13A enters a narrowly bent gap such as the inside of a living body or a structure while bending according to the internal shape of the gap. can do. Therefore, the optical measuring device 1A can perform measurement even inside a narrowly bent gap.

In the optical measuring device 1A, the light emitting surface 35A extends from one end 24a of the distribution path P4 to the other end 24b, and the light receiving surface 36A extends from one end 24a of the distribution path P4 to the other end 24b. As a result, the object to be measured is irradiated with light over a wider range, so that even if the density of the object to be measured is non-uniform, the effect is further leveled. Therefore, the optical measuring device 1A can further improve the reliability of measurement for a fluid having a non-uniform concentration.

The above-described embodiment can be implemented in various forms with various changes 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 elements 30, 30A and the light receiving elements 31, 31A may not include an organic semiconductor. Further, at least one of the tubular members 10, 10A, the light emitting elements 30, 30A, and the light receiving elements 31, 31A may not have flexibility.

Further, in the first embodiment and the second embodiment, the outer frame portions 15 and 15A do not have to be cylindrical. For example, the outer frame portions 15 and 15A may have a rectangular tubular shape having a cross section perpendicular to the extending direction having a rectangular frame shape, or a triangular tubular shape having a cross section perpendicular to the extending direction having a triangular frame shape. You may.

Further, in the first embodiment and the second embodiment, at least one of the power cables 32a, 32b, 32c, 32A and the signal cables 33a, 33b, 33c, 33A has the corresponding distribution paths P1, P2, P3, P4. It may be derived from the tubular members 10, 10A through the openings of the other ends 21b, 22b, 23b, 24b.

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

Further, in the first embodiment and the second embodiment, the optical measuring devices 1 and 1A may not be provided with the power cables 32 and 32A, and may not be provided with the signal cables 33 and 33A.

Further, in the first embodiment, the partition portion 16 is not limited to the above-mentioned shape. For example, the partition portion 16 may include two or four or more wall portions that radiate from the central axis of the outer frame portion 15 to the inner peripheral surface 25. Alternatively, the partition portion 16 may include a plurality of wall portions extending radially from the axis eccentric to the central axis of the outer frame portion 15 to the inner peripheral surface 25. Alternatively, the partition portion 16 may not have a radial cross section perpendicular to the extending direction of the partition portion 16. For example, the partition portion 16 may have a grid-like cross section or a honeycomb-like cross section perpendicular to the extending direction of the partition portion 16.

Further, in the first embodiment, the light emitting element 30 and the light receiving element 31 do not necessarily have to be arranged in all distribution channels.

Further, in the first embodiment, each of the light receiving elements 31a, 31b, 31c has sufficient sensitivity to all wavelength regions of the wavelengths λ1, λ2, λ3 of the light emitted by the light emitting elements 30a, 30b, 30c. It is said that it is a common element (element structure) having. However, each of the light receiving elements 31a, 31b, and 31c may be different elements (element structures) having sufficient sensitivity only for each wavelength region of the wavelengths λ1, λ2, and λ3.

1,1A ... Optical measuring device, 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 circumference Surface, 30, 30a, 30b, 30c, 30A ... Light emitting element, 31, 31a, 31b, 31c, 31A ... Light receiving element, 32, 32a, 32b, 32c, 32A ... Power cable, 33, 33a, 33b, 33c, 33A ... signal cable, P1, P2, P3, P4 ... distribution route, R ... axis.

Claims (5)

A tubular member in which a flow path with one end and the other end open is defined by an inner wall surface, and a fluid object to be measured can flow through the flow path.
A light emitting element arranged in a part of the inner wall surface and irradiating light toward the distribution path, and a light emitting element.
A light receiving element, which is arranged in a part of the inner wall surface facing the light emitting element, detects measurement light corresponding to the light emitted by the light emitting element, and outputs an output signal corresponding to the measurement light. Prepare,
The light emitting element has a sheet-shaped light emitting surface that irradiates surface-shaped light.
The light receiving element, have a sheet-shaped light receiving face capable of receiving the planar measurement light,
The tubular member includes a plurality of cylindrical outer frame portions and a plurality of axial members extending radially from the axis extending inside the outer frame portion along the extending direction of the outer frame portion to the inner peripheral surface of the outer frame portion. Has a partition, including the wall of the
A plurality of distribution channels are defined by a pair of surfaces of the wall portions adjacent to each other and a region between the pair of wall portions in the inner peripheral surface.
The light emitting device, Rutotomoni which have a sheet-shaped light emitting surface for illuminating a planar light, wherein arranged in each of the plurality of flow paths on the surface of the wall portion, different wavelengths towards the respective distribution channel Irradiate the light of
The light receiving element, Rutotomoni that having a planar sheet of light-receiving surface that can receive measurement light at each of the plurality of distribution channels, are disposed in the inner peripheral surface so as to face the light emitting element,
The inner peripheral surface is provided with an arrangement region in which the light receiving element is arranged and a non-arrangement region in which the light receiving element is not arranged.
An optical measuring device in which each of the plurality of wall portions of the partition portion is in contact with the inner peripheral surface in the non-arranged region. A power cable that is electrically connected to the light emitting element and is derived from the tubular member to transmit electric power supplied to the light emitting element.
The optical measuring device according to claim 1, further comprising a signal cable that is electrically connected to the light receiving element and is derived from the tubular member and transmits the output signal output by the light receiving element. The optical measuring device according to claim 1 or 2, wherein each of the light emitting element and the light receiving element includes an organic semiconductor. The optical measuring 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 one end of the distribution channel to the other end.
The optical measuring device according to any one of claims 1 to 4, wherein the light receiving surface extends from one end of the distribution path to the other end.

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