JPH01301127A - Rod-shaped sensor for optical environment measurement - Google Patents
Rod-shaped sensor for optical environment measurementInfo
- Publication number
- JPH01301127A JPH01301127A JP8123188A JP8123188A JPH01301127A JP H01301127 A JPH01301127 A JP H01301127A JP 8123188 A JP8123188 A JP 8123188A JP 8123188 A JP8123188 A JP 8123188A JP H01301127 A JPH01301127 A JP H01301127A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- rod
- optical
- shaped sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims description 34
- 238000005259 measurement Methods 0.000 title claims description 22
- 238000012935 Averaging Methods 0.000 abstract description 5
- 241000196324 Embryophyta Species 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Cultivation Of Plants (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
本発明は、植物群落内の光強度を測定するための光セン
サに係り、特に該群落内の部分的な光強度の変化や格差
に対応して平均化された光強度の測定が可能に成る光環
境測定用棒状センサに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical sensor for measuring light intensity within a plant community, and particularly to a light sensor for measuring light intensity within the community. The present invention relates to a rod-shaped sensor for measuring a light environment that is capable of measuring averaged light intensity.
一般に光強度の測定をする場合には、特定の被測定地点
において、点測定光センサにより一測定点の光強度を測
定すれば、その測定値により該測定地点を含むフィール
ド全体の光強度を代表させることができる。しかし、水
田内や麦畑内環植物が群生する、所謂植物群落内の光強
度は、植物体により遮光された影の部分や、植物体の反
射光が照射される部分等が交錯し、部分的に光強度が激
しく変化するものである。このように部分的に光強度が
激しく変化している場所において、光強度の測定をする
場合には、上記点測定光センサによっては部分的な光強
度の測定値を得ることはできても、当該群落全体の平均
的な光環境を測定することができない。Generally, when measuring light intensity, if the light intensity of one measurement point is measured using a point measurement optical sensor at a specific measurement point, that measurement value represents the light intensity of the entire field including the measurement point. can be done. However, the light intensity within a so-called plant community, where annular plants grow in clusters within a rice field or wheat field, is partially affected by shadow areas blocked by the plants and areas illuminated by reflected light from the plants. The light intensity changes drastically. When measuring light intensity in a place where the light intensity changes drastically in some areas, although it is possible to obtain a partial light intensity measurement value using the above-mentioned point measurement optical sensor, It is not possible to measure the average light environment of the entire community.
そこで従来から、第６図に示すように、上面側番ご光透
過窓５０を構成したケース５１内に複数の点測定用の光
センサ５２を縦列させ、これを直列に接続して成る所謂
棒状センサが用いられており、該複数個の光センサ５２
の合成信号、即ち平均値により植物群落内の所定広域に
おける光強度を測定していた。Therefore, conventionally, as shown in FIG. 6, a so-called rod-shaped sensor is constructed by arranging a plurality of optical sensors 52 for point measurement in tandem in a case 51 that includes a light transmitting window 50 on the upper side, and connecting these sensors in series. A plurality of optical sensors 52 are used.
The light intensity in a predetermined wide area within a plant community was measured using the composite signal, that is, the average value.
〔発明が解決しようとする課題］
しかし、上記従来の光環境測定用棒状センサは、点測定
用の複数個の光センサ５２を縦列させて構成するもので
あるため、各光センサ５２のばらつきによる測定誤差を
生じ易く、したがって各光センサ５２の特性を揃えるだ
めの回路構成や選別作業に手間がかかるばかりでなく、
棒状センサを構成するために多数の光センサ５２を必要
とするため、価格が高騰するという問題を有するもので
あった。[Problems to be Solved by the Invention] However, since the above-mentioned conventional rod-shaped sensor for measuring light environment is configured by arranging a plurality of light sensors 52 for point measurement in tandem, It is easy to cause measurement errors, and therefore not only does it take time and effort to configure the circuit and sort the characteristics of each optical sensor 52,
Since a large number of optical sensors 52 are required to constitute a rod-shaped sensor, there is a problem in that the price rises.
本発明は、上記問題に鑑みて創案されたものであり、２
個の光センサを使用するだけで植物群落内の所定広域に
おける平均的な光強度を誤差なく測定することができる
と共に１、従来の棒状センサに比較してきわめて安価な
光環境測定用棒状センサを提供することを目的とするも
のである。The present invention was created in view of the above problems, and
It is possible to measure the average light intensity in a predetermined wide area within a plant community without error by simply using several optical sensors.1.The rod-shaped sensor for measuring the light environment is extremely inexpensive compared to conventional rod-shaped sensors. The purpose is to provide
上記目的を達成するために、本発明に係る光環境測定用
棒状センサは、ケース上面に構成した長孔状光透過窓内
に受光部を露出させて成る導光体の両端にそれぞれ光セ
ンサを配置し、受光部を介して導光体内に透過させた光
を上記両光センサによって受光し、かつ、両光センサに
よる光出力信号を平均化することを要旨とするものであ
る。In order to achieve the above object, the rod-shaped sensor for optical environment measurement according to the present invention has optical sensors at both ends of a light guide whose light-receiving portion is exposed in a long hole-shaped light transmitting window formed on the top surface of the case. The gist of the present invention is to receive the light transmitted into the light guide through the light receiving section by the two optical sensors, and to average the optical output signals from the two optical sensors.
また導光体の形状は、円筒又は多角筒等の透明パイプに
限定されることはなく、丸棒又は角棒等の透明体であっ
てもよい。Further, the shape of the light guide is not limited to a transparent pipe such as a cylinder or a polygonal tube, and may be a transparent body such as a round bar or a square bar.
更に、導光体の受光部をケース表面と同一平面に構成す
ることにより照射変位に伴う受光効果を高めることもで
きる。Furthermore, by configuring the light receiving portion of the light guide so as to be flush with the case surface, the light receiving effect accompanying the irradiation displacement can be enhanced.
而して、上記構成によれば、導光体の両端に配置した左
右２個の光センサが上記導光体の受光部を介して群落内
の光を受光し、平均値を出力して所定広域における光強
度の測定を可能にするばかりでなく、当該フィールドに
対する信顧性の高い測定値を得ることができる。According to the above configuration, the two left and right optical sensors disposed at both ends of the light guide receive light within the community through the light receiving portion of the light guide, output an average value, and calculate a predetermined value. This not only makes it possible to measure light intensity over a wide area, but also allows highly reliable measurement values for the field to be obtained.
以下、本発明に係る光環境測定用棒状センサに関する一
実施例を図面に従って説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rod-shaped sensor for measuring light environment according to the present invention will be described below with reference to the drawings.
第１図及び第２図は、本発明に係る光環境測定用棒状セ
ンサの第一の実施例を示すものであり、１は、植物群落
内における被測定広域の広さに対応する長さのアルミ製
又はステンレス製等、光が透過しない材料で形成したケ
ースであり、該ケース１の上面側には、その長手方向に
沿った光透過窓２を開設すると共に、該ケース１の側方
開口３側から導光体４を挿入してその外側面側を上記光
透過窓２内に露出させて成り、更に該導光体４の両端部
に光センサ５ａ、５ｂを嵌着させたものである。本実施
例において、導光体４は、４００〜８００ｎｍ程度の波
長の光がフラットに透過し得るようなガラス又は透明合
成樹脂材料により所定長さのパイプ状に成形されている
。上記導光体４の長さは、植物群落の種類や被測定部位
の環境条件等の測定の目的により選定されるものである
が、−船釣には３００〜１０００ｍｍ程度の長さが必要
である。またケース１の光透過窓２に対応する外側面に
は該光透過窓２に嵌まり合い、その外表面がケース１の
外表面と一致する突条の受光部４ａを形設しであり、し
たがって、ケース１の光透過窓２に照射する光を、その
照射変位に伴い全開口部を利用して有効に導光体４内に
導入することができるようになっている。上記光センサ
５ａ、５ｂとして、照度、日射、光量子測定用等の種類
を測定の目的によって使い分けすることも可能であり、
適宜これを選択構成して所望の測定をすることができる
ものである。また、６ａ、６ｂは、光センサ５ａ、５ｂ
の装着部をシールするための０リングであり、パイプ状
導光体４内に対する不純物の侵入を防止する。７は、ケ
ースｌの側方開口部を被蓋する蓋である。1 and 2 show a first embodiment of a rod-shaped sensor for measuring light environment according to the present invention, and 1 is a rod-shaped sensor with a length corresponding to the wide area to be measured in a plant community. The case is made of a material that does not allow light to pass through, such as aluminum or stainless steel.A light transmitting window 2 is provided along the longitudinal direction of the case 1 on the top side of the case 1, and a side opening of the case 1 is provided. The light guide 4 is inserted from the third side and its outer side is exposed inside the light transmitting window 2, and optical sensors 5a and 5b are fitted to both ends of the light guide 4. be. In this embodiment, the light guide 4 is formed into a pipe shape of a predetermined length using glass or a transparent synthetic resin material that allows light with a wavelength of approximately 400 to 800 nm to pass therethrough flatly. The length of the light guide 4 is selected depending on the purpose of measurement, such as the type of plant community and the environmental conditions of the area to be measured. be. Further, on the outer surface of the case 1 corresponding to the light transmitting window 2, a protruding light receiving portion 4a is formed which fits into the light transmitting window 2 and whose outer surface coincides with the outer surface of the case 1. Therefore, the light irradiated onto the light transmitting window 2 of the case 1 can be effectively introduced into the light guide 4 by utilizing all the openings as the irradiation displacement occurs. As the optical sensors 5a and 5b, types for illuminance, solar radiation, photon measurement, etc. can be used depending on the purpose of measurement.
It is possible to perform desired measurements by selecting and configuring these as appropriate. Further, 6a and 6b are optical sensors 5a and 5b.
This is an O-ring for sealing the mounting portion of the pipe-shaped light guide 4, and prevents impurities from entering into the pipe-shaped light guide 4. 7 is a lid that covers the side opening of the case l.
導光体４の両端に配置した両光センサ５ａ、５ｂは、そ
れぞれリード線８ａ、８ｂを介して平均化装置９に接続
すると共に、該平均化装置９の出力を信号線１０ａ、１
０ｂに送出するように構成する。第３図は、上記接続法
の一例を示すものである。而して、棒状センサの光透過
窓２部に照射した植物群落内の光は、部分的な光強度の
ばらつきの有無にも係わらず、第４図に示すように、導
光体４の左右両端部に構成した両光センサ５ａ。Both optical sensors 5a and 5b arranged at both ends of the light guide 4 are connected to an averaging device 9 via lead wires 8a and 8b, respectively, and the output of the averaging device 9 is connected to signal lines 10a and 10.
0b. FIG. 3 shows an example of the above connection method. As shown in FIG. Both optical sensors 5a are configured at both ends.
５ｂが導光体４の長さ方向に対して有する特性Ａ。Characteristic A that 5b has in the longitudinal direction of the light guide 4.
Ｂを平均化し、両者の平均値、即ち平均化信号Ｃを送出
する。１１は、平均化装置９に接続したアース線である
。B is averaged and the average value of both, that is, the averaged signal C is sent out. 11 is a ground wire connected to the averaging device 9.
第５図は、導光体４に関する他の実施例を示すものであ
り、導光体４のパイプ状外側面がケース１の光透過窓２
の外方へ露出するように構成したものである。このよう
に構成すると、導光体４の外表面に突条等特別な受光部
４ａ等の構成物が存在しないため、導光体４自体の成形
作業性を高めることができる。尚、上記導光体４の断面
形状は、円筒に限定されるものではなく、それが光を透
過させるものであれば、丸棒状、四角形状、六角形状そ
の他任意の形状を選ぶことができるものであり、受光部
４ａの形状についても、突条である必要はなく、本発明
の目的の範囲内において適宜設計変更することができる
。FIG. 5 shows another embodiment of the light guide 4, in which the pipe-shaped outer surface of the light guide 4 is connected to the light transmitting window 2 of the case 1.
The structure is such that it is exposed to the outside. With this configuration, since there is no special component such as the light receiving portion 4a such as a protrusion on the outer surface of the light guide 4, the workability of molding the light guide 4 itself can be improved. The cross-sectional shape of the light guide 4 is not limited to a cylinder, and any shape such as a round bar, square, hexagon, etc. can be selected as long as it transmits light. The shape of the light-receiving portion 4a also does not need to be a protrusion, and the design can be changed as appropriate within the scope of the purpose of the present invention.
本発明に係る光環境測定用棒状センサは、以上のように
構成したから、導光体の左右両端部に２個の光センサを
装着するだけで、棒状センサを構成することができ、所
定広域の植物群落内における平均した光強度を測定する
ことができるばかりでなく、棒状センサの構造を簡略化
し、価格の低減化を図ることができる。したがって、棒
状センサの使用を一般化し、農家レベルにおいて栽培舎
理の数値化による綿密な農作業管理が可能と成り、農業
生産性の向上に貢献できる等、優れた効果を有するもの
である。Since the rod-shaped sensor for optical environment measurement according to the present invention is constructed as described above, the rod-shaped sensor can be configured by simply attaching two optical sensors to both the left and right ends of the light guide, and can be used over a predetermined wide area. This not only makes it possible to measure the average light intensity within a plant community, but also simplifies the structure of the rod-shaped sensor and reduces the cost. Therefore, the use of rod-shaped sensors can be generalized, and detailed agricultural management can be performed at the farmer level by quantifying cultivation practices, which can contribute to improving agricultural productivity, which has excellent effects.
第１図は本発明に係る光環境測定用棒状センサの正断面
図、
第２図は同じく第１図■−■線断面図、第３図は光セン
サの接続法の一例を示す回路図、第４図は光センサの特
性を示す説明図、第５図は導光体に関する他の実施例を
示す要部側断面図、
第６図は従来の棒状センサを示す斜視図である。
ｌ・・・ケース ２・・・光透過窓４・・
・導光体 ４ａ・・・受光部５ａ、５ｂ・・
・光センサ ９・・・平均化装置１０ａ、１Ｏｂ−・
・信号線FIG. 1 is a front sectional view of a rod-shaped sensor for optical environment measurement according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a circuit diagram showing an example of how to connect the optical sensor. FIG. 4 is an explanatory diagram showing the characteristics of the optical sensor, FIG. 5 is a sectional side view of a main part showing another embodiment of the light guide, and FIG. 6 is a perspective view showing a conventional rod-shaped sensor. l...Case 2...Light transmission window 4...
・Light guide 4a... Light receiving part 5a, 5b...
・Optical sensor 9...Averaging device 10a, 1Ob-・
·Signal line
Claims (4)
を露出させて成る導光体の両端にそれぞれ光センサを配
置し、受光部を介して導光体内に透過導入させた光を上
記両光センサによって受光し、かつ、両光センサによる
光出力信号を平均化することを特徴とする光環境測定用
棒状センサ。(1) Optical sensors are placed at both ends of a light guide with a light receiving section exposed inside a long hole-shaped light transmitting window formed on the top surface of the case, and light is transmitted and introduced into the light guide through the light receiving section. A rod-shaped sensor for measuring an optical environment, characterized in that the light is received by both the optical sensors, and the optical output signals from both the optical sensors are averaged.
とを特徴とする請求項１記載の光環境測定用棒状センサ
。(2) The rod-shaped sensor for optical environment measurement according to claim 1, wherein the light guide is a transparent pipe such as a cylinder or a polygonal cylinder.
徴とする請求項１記載の光環境測定用棒状センサ。(3) The rod-shaped sensor for optical environment measurement according to claim 1, wherein the light guide is a transparent body such as a round rod or a square rod.
たことを特徴とする請求項１、２又は３記載の光環境測
定用棒状センサ。(4) The rod-shaped sensor for optical environment measurement according to claim 1, 2 or 3, characterized in that the light receiving portion of the light guide is arranged on the same plane as the case surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8123188A JPH01301127A (en) | 1988-04-04 | 1988-04-04 | Rod-shaped sensor for optical environment measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8123188A JPH01301127A (en) | 1988-04-04 | 1988-04-04 | Rod-shaped sensor for optical environment measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01301127A true JPH01301127A (en) | 1989-12-05 |
Family
ID=13740679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8123188A Pending JPH01301127A (en) | 1988-04-04 | 1988-04-04 | Rod-shaped sensor for optical environment measurement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01301127A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55144511A (en) * | 1979-04-23 | 1980-11-11 | Li Cor Inc | Optical sensor |
-
1988
- 1988-04-04 JP JP8123188A patent/JPH01301127A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55144511A (en) * | 1979-04-23 | 1980-11-11 | Li Cor Inc | Optical sensor |
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