JP2010091424A - Evaluation device for carbon dioxide consumption function of plant under light irradiation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaluation device that evaluates the carbon dioxide consumption function of plants in a short time, using a simple operation. <P>SOLUTION: This device for evaluating carbon dioxide consumption function of plants under irradiation of light includes: a light irradiation-sensor part (1), including a receiving part (12) capable of storing at least a part (6) of the plant and an openable/closable lid part (11), and includes a light-emitting body (112) and a carbon dioxide concentration sensor (122) on the inner surface (121) of the receiving part or on the inner surface (111) of the lid part; a display (3), connected to the carbon dioxide concentration sensor via an electric wiring (2) extended from the irradiation-sensor part for displaying data, based on the carbon dioxide concentration value sensed by the sensor; and a power source (5), electrically connected respectively to the light emitting body, the carbon dioxide concentration sensor and the display. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for evaluating the carbon dioxide consumption function of a plant under illumination.

  In recent years, it has been demanded to reduce the concentration of carbon dioxide (carbon dioxide) in the atmosphere, which causes global warming. In addition, experimental devices have been developed that can closely observe the characteristics of plants that absorb carbon dioxide in the atmosphere.

Patent Document 1 discloses a casing that contains a plant and is hermetically sealed, an environment changing unit in the casing, a sensor that detects the concentration of carbon dioxide in the casing, and a data display unit that is based on the detection value of the sensor. A plant carbon dioxide absorption experimental device comprising: Using this experimental apparatus, the plant is housed in a housing and sealed, and then the concentration of carbon dioxide in the housing is measured while changing the environment in the housing, so that the photosynthesis of the plant accompanying the consumption of carbon dioxide is measured. The action can be confirmed. In the same document, it is described that by using the above-described experimental apparatus, it is possible to allow an experimenter to accurately and easily understand the action of plant photosynthesis by a simple operation.
JP 2007-79320 A

  With the above experimental apparatus, it is possible to accurately observe the action of photosynthesis in plants. However, this experiment apparatus needs to adjust the height of the plant planted in the pot to a height that can be accommodated in the casing, for example, in a state where the plant can be accommodated in the casing when performing the experiment. . In addition, it is difficult to conduct experiments on plants that cannot be accommodated in the housing, for example, plants that grow naturally in the natural environment, especially trees. Also, when conducting comparative experiments on different types of plants, it is necessary to adjust each type of plant so that it can be accommodated in the housing, and then place the plants in the housing one by one in order to conduct experiments in order. There is. For this reason, it is difficult for the experimental apparatus of the above-mentioned literature to perform experiments in a short time and simply.

  The objective of this invention is providing the evaluation apparatus which can evaluate the carbon dioxide consumption function of a plant by simple operation and for a short time.

  The inventors of the present application do not place the plant in an airtight space as in the device of Patent Document 1 described above, so that the carbon dioxide concentration value around the plant is measured by the carbon dioxide concentration sensor by irradiating the plant with light. The evaluation apparatus of the present invention has been completed based on the knowledge that it shows a change that can be sensed and shows a change in a short time sufficient for simple evaluation.

  The present invention comprises an illumination / sensor unit comprising a receiving unit that can accommodate at least a part of a plant and a lid unit that can be opened and closed, and the inner surface of the receiving unit or the inner surface of the lid unit includes a light emitter and a carbon dioxide concentration sensor. Display device for displaying data based on carbon dioxide concentration value sensed by said sensor, connected to said carbon dioxide concentration sensor via electrical wiring extending from illumination / sensor section, and said light emitter, carbon dioxide concentration sensor And an apparatus for evaluating the carbon dioxide consumption function of a plant under illumination, including a power source electrically connected to each of the display devices or a terminal connectable to the power source.

  The present invention also includes an illumination / sensor unit comprising a receiving unit that can accommodate at least a part of a plant and a lid unit that can be opened and closed, and the inner surface of the receiving unit or the inner surface of the lid unit includes a light emitter and a carbon dioxide concentration sensor. Each of the sensors connected to the two carbon dioxide concentration sensors via electrical wiring extending from each of the reference sensor unit, the illumination / sensor unit, and the reference sensor unit including the carbon dioxide concentration sensor. A display device that displays data based on the difference value of the sensed carbon dioxide concentration value, and can be connected to a power source or a power source electrically connected to each of the light emitter, each carbon dioxide concentration sensor, and the display device. There is also an apparatus for evaluating the carbon dioxide consumption function of a plant under illumination, including a simple terminal.

The preferable aspect of the evaluation apparatus of the present invention is as follows.
(1) The light emission color of the light emitter is red.
(2) The light emitter is an organic electroluminescence element.
(3) The lid part and the receiving part are connected.
(4) Open and close while changing the angle between the inner surface of the lid and the inner surface of the receiving portion.
(5) One of the inner surface of the receiving portion and the inner surface of the lid portion includes a light emitter, and the other includes a carbon dioxide concentration sensor.
The receiving part and the lid part are relative concepts. In the present specification, the larger volume is referred to as a receiving portion, and the smaller volume is referred to as a lid portion. The volume of the lid portion may not be present (the volume may be 0). The receiving part needs to have a volume sufficient to contain a part of the plant (usually one leaf). The volume of the receiving part and the lid part may be exactly the same.

The evaluation device of the present invention can open or seal the plant to be measured with respect to the outside world by opening and closing the lid, instead of arranging the plant to be measured in the airtight space. Therefore, the carbon dioxide consumption function of a plant can be evaluated as necessary under conditions where light and air from the outside are blocked.
When opening and closing while changing the angle between the inner surface of the lid part and the inner surface of the receiving part, it is also possible to measure by changing the irradiation angle of light to the plant. Moreover, the structure which consists of a cover part and a receiving part also has the protection function with respect to a light-emitting body and a carbon dioxide concentration sensor.

The evaluation apparatus of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram illustrating a configuration example of an evaluation apparatus according to the present invention.
The evaluation apparatus shown in FIG. 1 is used for evaluating the carbon dioxide consumption function of a plant under illumination. This evaluation apparatus comprises an illumination / sensor unit 1, an electrical wiring 2, a display device 3, and a power source 5 (not shown in FIG. 1).
The illumination / sensor unit 1 includes a receiving unit 12 that can accommodate at least a part of a plant and a lid unit 11 that can be opened and closed. A light emitter 112 made of an organic electroluminescence element is provided on the inner surface 111 of the lid portion 11. On the other hand, a carbon dioxide concentration sensor 122 is provided on the inner surface 121 of the receiving portion 12. The receiving part 12 may be provided with a notch 123 for easily accommodating a part of the plant (usually a leaf).

In the present invention, a light emitter and a carbon dioxide concentration sensor may be provided on the inner surface of the receiving portion and the inner surface of the lid portion. Therefore, when the light emitter and the carbon dioxide concentration sensor are provided on the inner surface of the receiving portion, and when the light emitter and the carbon dioxide concentration sensor are provided on the inner surface of the lid portion, the light emitter is provided on the inner surface of the receiving portion. When the carbon dioxide concentration sensor is provided on the inner surface of the lid portion, the carbon dioxide concentration sensor is provided on the inner surface of the receiving portion, and the light emitter is provided on the inner surface of the lid portion (the mode shown in FIG. 1). Either of these may be used. However, it is desirable that the illumination / sensor unit 1 has a size that can be transported and operated with one hand. In order to reduce the size of the illumination / sensor unit 1, a light emitter can be provided on one of the inner surface of the receiving unit and the inner surface of the lid, and a carbon dioxide concentration sensor can be provided on the other (separating the function into the receiving unit and the lid). Is desirable. By using the organic electroluminescence element, the light emitter can be made thinner more easily than the carbon dioxide concentration sensor. Therefore, as in the embodiment shown in FIG. 1, it is most preferable to provide a carbon dioxide concentration sensor on the inner surface of the receiving portion and to provide a light emitter on the inner surface of the lid portion.
In order to avoid the influence of external light, the lid part and the receiving part are preferably made of an opaque material (light transmittance of less than 80%, preferably less than 60%, more preferably less than 40%).

  There are no particular restrictions on the method of opening and closing the receiving portion and the lid portion. A sliding lid may be used. Moreover, you may design so that a cover part can isolate | separate completely from a receiving part. However, it is preferable that the lid part and the receiving part are connected. Moreover, when measuring by changing the irradiation angle of the light with respect to a plant, the method of opening and closing, changing the angle of the inner surface of a cover part and the inner surface of a receiving part is desirable. For example, as shown in FIG. 1, by connecting the lid portion and the receiving portion using a hinge 13, the lid can be opened and closed while changing the angle between the inner surface of the lid portion and the inner surface of the receiving portion.

  The display device 3 is connected to a carbon dioxide concentration sensor 122 via an electrical wiring 2 extending from the illumination / sensor unit 1. The display device 3 has a data display surface 31 based on the carbon dioxide concentration value sensed by the carbon dioxide concentration sensor 122. In addition, a sensor switch 32 and a light emitter switch 33 are also attached to the display device 3 shown in FIG.

FIG. 2 is a diagram showing another configuration example of the evaluation apparatus of the present invention.
The evaluation apparatus shown in FIG. 2 is used for evaluating the carbon dioxide consumption function of a plant under illumination. The evaluation apparatus includes an illumination / sensor unit 1, an electrical wiring 2, a display device 3, a power source 5 (not shown in FIG. 2), and a reference sensor unit 4.
The illumination / sensor unit 1, the electrical wiring 2, and the display device 3 are the same as those in FIG.

FIG. 3 is a partial cross-sectional view of the illumination / sensor unit shown in FIG. 1 (a view cut along a plane including XY and XZ directions).
As shown in FIG. 3, the organic electroluminescence element 112 that functions as a light emitter is provided on a substrate 113.
FIG. 4 is an electric circuit diagram of the evaluation apparatus of FIG.
As shown in FIG. 4, the power source 5 is electrically connected to the display device 3 and the carbon dioxide concentration sensor 122 via a sensor switch 32 as necessary. The power source 5 is also electrically connected to the display device 3 and the light emitter (organic electroluminescence element) 112 via a light emitter switch 33 as necessary.

  In the evaluation apparatus shown in FIGS. 1 to 4, an organic electroluminescence element 112 is used as a light emitter of the illumination / sensor unit 1. As the illuminant, a known illuminant such as an inorganic electroluminescence element, a light emitting diode, or a small light bulb can be used instead of the organic electroluminescence element. In order to make plant photosynthesis active, it is preferable to irradiate the plant mainly with red light. For this reason, it is preferable that the luminescent color of a light-emitting body is red. In addition to the red light, the plant is preferably irradiated with blue light as an auxiliary. Therefore, it is preferable to use an organic electroluminescence element or a light emitting diode as the light emitting body because it is easy to set the emission color and has low power consumption, and the shape and size (area) of light emission can be easily set. Therefore, it is particularly preferable to use an organic electroluminescence element (hereinafter referred to as an organic EL element).

The organic EL element 112 is formed on the surface (inner surface in FIG. 3) of a transparent substrate 113 typified by glass, for example.
The organic EL element 112 is manufactured by, for example, laminating a transparent positive electrode layer, an organic light emitting material layer, and a negative electrode layer in this order on the surface of the substrate 113. In the organic EL element 112, when electric energy is applied between the positive electrode layer and the negative electrode layer, holes are injected from the positive electrode layer and electrons are injected from the negative electrode layer into the organic light emitting material layer. Then, the holes and electrons recombine inside the organic light emitting material layer, so that the organic light emitting material layer emits light having a color determined by the organic light emitting material. The emitted light passes through the transparent electrode layer and the transparent substrate 113 and is extracted outside the illumination / sensor unit 1. For example, when a plurality of light emitting diodes are arranged as light emitters on the outer surface of the substrate 113, the substrate 113 does not have to be transparent.

  In order to set the luminescent color of the organic EL element 112 to red, as the organic luminescent material for forming the organic luminescent material layer, for example, 4- (dicyanomethylene) -2-methyl-6-julolidyl-9-enyl- 4H-pyran (4- (Dicyanomethylene) -2-methyl-6-julolidyl-9-enyl-4H-pyran) can be used. In order to set the emission color to blue, for example, perylene can be used as the organic light emitting material.

Further, in order to increase the luminous efficiency of the organic EL element by efficiently injecting holes and electrons to be recombined inside the organic light emitting material layer into the organic light emitting material layer, A hole transport layer may be provided between the organic light emitting material layer and an electron transport layer may be provided between the negative electrode layer and the organic light emitting material layer.
The material, configuration, and manufacturing method of the organic EL element are well known.

A known solid electrolyte type carbon dioxide concentration sensor is used as the carbon dioxide concentration sensor 122. As the carbon dioxide concentration sensor, a known one, for example, an optical carbon dioxide concentration sensor may be used. The optical carbon dioxide concentration sensor has a configuration in which a light source that generates infrared light and an optical sensor such as a photodiode are spaced apart from each other. When the configuration of the optical carbon dioxide concentration sensor is applied to the present invention, a light emitter and a sensor are disposed on one of the receiving portion 12 and the lid portion 11.
An optical carbon dioxide concentration sensor uses the fact that the intensity of infrared light detected by an optical sensor varies depending on the concentration of carbon dioxide between the light source and the optical sensor. Sense. The optical carbon dioxide concentration sensor is disposed so that the light emission of the organic EL element does not pass between the light source and the optical sensor in order to suppress a decrease in the measurement accuracy (for example, the illumination / sensor unit rather than the organic EL element) Is preferably arranged on the inner side).

  In order to suppress deterioration of the light emission characteristics due to moisture absorption of the organic EL element, the inside of the lid part or the receiving part to which the organic EL element is attached can be a vacuum space or a space filled with an inert gas. In addition, a known low moisture-permeable resin material film (for example, a film formed of an ultraviolet curable acrylic resin used for hermetically sealing the organic EL element) is attached to the surface of the organic EL element. You can also

  The carbon dioxide concentration sensor 122 is connected to the display device 3 for displaying the carbon dioxide concentration value sensed by the sensor 122 via the electrical wiring 2 extending from the illumination / sensor unit 1. A liquid crystal display device can be used for the display surface 31 of the display device 3. Between the carbon dioxide concentration sensor 122 and the display device 3, an amplifier that amplifies an electric signal output from the sensor 122, an arithmetic device that calculates the electric signal and generates data to be displayed on the display device, and the like are provided. It may be.

  As shown in FIG. 1, the display device 3 displays the carbon dioxide concentration value sensed by the carbon dioxide concentration sensor 122. Based on the carbon dioxide concentration value sensed by the sensor 122, for example, the time variation data of the carbon dioxide concentration can be displayed as a graph by the display device 3.

  A power source 5 for driving is connected to each of the organic EL elements (light emitters) 112, the carbon dioxide concentration sensor 122, and the display device 3. When an external power source is used, a terminal that can be connected to an external power source can be used instead of the power source 5 described above.

  By turning on the sensor switch 32 shown in FIGS. 1 to 4, electric energy is supplied from the power supply 5 to each of the carbon dioxide concentration sensor 122 and the display device 3, and thereby the carbon dioxide concentration value sensed by the sensor 122 is changed. It is displayed on the display device 3. On the other hand, by turning on the light-emitting body switch 33, electric energy is supplied from the power source 5 to the organic EL element 112, and the organic EL element 112 can emit light. Between the power supply 5 and the organic EL element 112, a device for controlling the intensity of light emission of the organic EL element 112 may be provided.

FIG. 5 is a diagram illustrating a state in which the illumination / sensor unit illustrated in FIG. 1 is opened.
As shown in FIG. 5, a part (a leaf in the figure) 6 of the plant to be measured is placed between the lid portion 11 and the receiving portion 12 of the illumination / sensor unit 1. In measurement with an open system or oblique light irradiation, the measurement can be performed in this state.
FIG. 6 is a diagram illustrating a state in which the illumination / sensor unit illustrated in FIG. 1 is closed.
As shown in FIG. 6, the lid portion 11 and the receiving portion 12 of the illumination / sensor unit 1 are closed, and a part of a plant (a leaf in the drawing) 6 is measured with the lid 11 of the illumination / sensor unit 1. It is sandwiched between the receiving part 12. In the measurement by light irradiation from the closed system or from the front, the measurement can be performed in this state.

With the evaluation apparatus according to the present invention, the carbon dioxide consumption function of a plant can be evaluated as follows.
The experimenter moves the illumination / sensor unit 1 of the evaluation device by hand, and the leaf 6 of the plant to be measured is moved between the lid 11 and the receiving unit 12 of the illumination / sensor unit 1 as shown in FIG. Put in between. Next, as shown in FIG. 6, the lid portion 11 and the receiving portion 12 are closed, and the leaf 6 is sandwiched between the lid portion 11 and the receiving portion 12 of the illumination / sensor portion 1.

  Next, the sensor switch 32 is turned on. Thereby, the carbon dioxide concentration value sensed by the sensor 122 is displayed on the display device 3. The carbon dioxide concentration value displayed at this time is almost the same as the indoor carbon dioxide concentration value because the plant hardly performs photosynthesis.

When the illuminant switch 33 is turned on, the organic EL element 112 emits light, and the plant consumes the surrounding carbon dioxide for photosynthesis, so that the carbon dioxide concentration value displayed on the display device 3 starts to decrease.
The experimenter can evaluate the carbon dioxide consumption function of the plant by a simple operation and in a short time by confirming the variation of the carbon dioxide concentration value as described above.

  Since the evaluation apparatus of the present invention can easily carry the illumination / sensor unit, it is not necessary to arrange the plant in the airtight space, and it is not necessary to move the plant for evaluation. In addition, it is possible to evaluate the carbon dioxide consumption function for plants, particularly trees, which grow naturally in a natural environment that cannot be accommodated in an airtight space.

  Similarly, evaluation of plants growing naturally outdoors can also be performed. Since the device of the present invention has a light source and can adjust the influence of the outside world by opening and closing the lid, it is affected by the outside weather (sunny, cloudy, rainy) and sunlight (sunlight, shade, daytime, night) It is possible to evaluate the carbon dioxide consumption function of plants.

In the measurement using the evaluation apparatus of FIG. 2 provided with the reference sensor unit 4, the display device 3 includes a carbon dioxide concentration sensor 122 of the illumination / sensor unit 1, and a carbon dioxide concentration sensor of the reference sensor unit 4. Each displays a difference value of the carbon dioxide concentration value sensed.
As a result, even for small children such as elementary school students, the illumination / sensor unit 1 and the reference sensor unit 4 are sensing the concentration of carbon dioxide under exactly the same conditions except for the position where each is placed. Easy to understand.

  The display surface 31 of the display device 3 in FIG. 2 indicates the difference between the carbon dioxide concentration values sensed by the carbon dioxide concentration sensor 122 of the illumination / sensor unit 1 and the carbon dioxide concentration sensor of the reference sensor unit 4. indicate. The display device 3 includes a device that calculates a difference value between the carbon dioxide concentration values. The minus sign displayed together with the difference value of the carbon dioxide concentration value by the display device 3 shown in FIG. 2 is attached so that it is easy to imagine that the amount of carbon dioxide absorbed by the plant is displayed. It is a thing. Further, in order for a small child to easily understand the carbon dioxide consuming function of the plant, the display device 3 replaces the display of the difference value of the carbon dioxide concentration value or the difference value of the carbon dioxide concentration value. In addition to the display, it is also possible to display visually easily understandable data such as a bar graph based on the difference value.

  The evaluation apparatus in FIG. 2 has an advantage that the carbon dioxide consumption function of a plant can be evaluated very easily without darkening the room. In this evaluation apparatus, before the organic EL element 112 emits light, the carbon dioxide concentration value sensed by the carbon dioxide concentration sensor 122 of the illumination / sensor unit 1 and the carbon dioxide concentration sensor of the reference sensor unit 4 are used. The perceived carbon dioxide concentration value is almost equal. For this reason, the display device 3 normally displays a zero value that is the difference between the two density values. When the organic EL element 112 is caused to emit light, the numerical value displayed on the display device 3 is increased, thereby confirming that the plant is consuming carbon dioxide.

[Example 1]
The illumination / sensor unit 1 of the evaluation apparatus in FIG. 1 was placed at a position 5 cm away from the surface of the leaves of potted plants placed indoors. The organic EL element was composed of a red light emitting organic EL element piece and a blue light emitting organic EL element piece.

  The experimenter moves the illumination / sensor unit 1 of the evaluation device by hand, and the leaf 6 of the plant to be measured is moved between the lid 11 and the receiving unit 12 of the illumination / sensor unit 1 as shown in FIG. I put it in between. Next, as shown in FIG. 6, the lid portion 11 and the receiving portion 12 were closed, and the leaf 6 was sandwiched between the lid portion 11 and the receiving portion 12 of the illumination / sensor portion 1. At this time, the carbon dioxide concentration detected by the carbon dioxide concentration sensor 122 was 730 ppm.

Subsequently, the organic EL element 112 was caused to emit light, and this light emission (photon flux density: about 4.5 μmol / m ² seconds) was irradiated to the plant. As a result, the concentration of carbon dioxide detected by the carbon dioxide concentration sensor 122 decreased to 550 ppm within a short period of 2 minutes.

  By using the apparatus of the present invention, the carbon dioxide consumption function of a plant can be evaluated with a simple operation and in a short time. Therefore, it can be effectively used in campaigns for recognizing the importance of afforestation and tree planting projects for protecting the global environment, particularly for preventing global warming.

It is a figure which shows the structural example of the evaluation apparatus of this invention. It is a figure which shows another structural example of the evaluation apparatus of this invention. It is a fragmentary sectional view (XY, XZ direction) of the illumination / sensor part shown in FIG. It is an electric circuit diagram of the evaluation apparatus of FIG. It is a figure which shows the state which opened the illumination and sensor part shown in FIG. It is a figure which shows the state which closed the illumination and the sensor part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illumination and sensor part 11 Cover part 111 Inner surface of a cover part 112 Organic electroluminescent element (light-emitting body)
DESCRIPTION OF SYMBOLS 113 Board | substrate 12 Receiving part 121 Inner surface 122 Carbon dioxide concentration sensor 123 Notch 13 Hinge 2 Electrical wiring 22 Wiring between a reference sensor part and a display apparatus 3 Display apparatus 31 Display surface 32 Sensor switch 33 Light emitting body Switch 4 Sensor unit for reference 5 Power supply 6 Leaf of plant to be measured

Claims (7)

  An illumination / sensor unit, an illumination / sensor unit comprising a receiving unit that can accommodate at least a part of a plant and a lid unit that can be opened and closed, and the inner surface of the receiving unit or the inner surface of the lid unit includes a light emitter and a carbon dioxide concentration sensor. A display device for displaying data based on a carbon dioxide concentration value sensed by the sensor, connected to the carbon dioxide concentration sensor through an electrical wiring extending from the sensor, and the light emitter, the carbon dioxide concentration sensor, and the display device. An apparatus for evaluating the carbon dioxide consumption function of a plant under illumination, including a power source electrically connected to each terminal or a terminal connectable to the power source.   An illumination / sensor unit, a carbon dioxide concentration sensor comprising a receiving part capable of accommodating at least a part of a plant and a lid part that can be opened and closed, and the inner surface of the receiving part or the inner surface of the lid part includes a light emitter and a carbon dioxide concentration sensor. The carbon dioxide concentration sensed by each of the sensors connected to both carbon dioxide concentration sensors via electrical wiring extending from each of the reference sensor unit, the illumination / sensor unit, and the reference sensor unit A display device for displaying data based on a difference value, and a light source electrically connected to each of the light emitter, each carbon dioxide concentration sensor and the display device, or a terminal connectable to the power source, A device that evaluates the carbon dioxide consumption function of plants under illumination.   The device according to claim 1 or 2, wherein the luminescent material emits red light.   The apparatus according to claim 3, wherein the light emitter is an organic electroluminescence element.   The device according to claim 1 or 2, wherein the receiving portion and the lid portion are connected to each other.   The device according to claim 1, wherein the device opens and closes while changing an angle between the inner surface of the lid portion and the inner surface of the receiving portion.   The apparatus according to claim 1, wherein one of the inner surface of the receiving portion and the inner surface of the lid portion includes a light emitter, and the other includes a carbon dioxide concentration sensor.

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