JP3466360B2 - Moisture content detection device - Google Patents
Moisture content detection deviceInfo
- Publication number
- JP3466360B2 JP3466360B2 JP02124996A JP2124996A JP3466360B2 JP 3466360 B2 JP3466360 B2 JP 3466360B2 JP 02124996 A JP02124996 A JP 02124996A JP 2124996 A JP2124996 A JP 2124996A JP 3466360 B2 JP3466360 B2 JP 3466360B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- detected
- moisture content
- water
- 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.)
- Expired - Fee Related
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- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は被検知物の含水分を
検知する含水分検知装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water content detection device for detecting the water content of an object to be detected.
【0002】[0002]
【従来の技術】物に含まれる水分の量により物の物理的
・科学的性質が変化するので、製品の品質管理や種々の
工程管理等において、物の含水分の検知が必要になるこ
とが多い。物の含水分を検知する方法は、水が吸収する
波長域の赤外光と、水の吸収の変化が少ない波長域の赤
外光とを被検知物に順次に照射して被検知物で反射され
た各赤外光の強度から被検知物の含水分を検知する方法
があり、この方法を実施する含水分検知装置も知られて
いる。2. Description of the Related Art Since the physical and scientific properties of an object change depending on the amount of water contained in the object, it is necessary to detect the water content of the object in quality control of products and various process controls. Many. The method of detecting the water content of an object is to irradiate the object with infrared light in the wavelength range that water absorbs and infrared light in the wavelength range with little change in water absorption, and There is a method of detecting the moisture content of a detected object from the intensity of each reflected infrared light, and a moisture content detection device that implements this method is also known.
【0003】この含水分検知装置においては、光源か
ら、水が吸収する波長域の赤外光と、水の吸収の変化が
少ない比較波長域の赤外光との2つの波長の赤外光を被
検知物に照射し、その反射光を受光素子からなる受光部
で受光して受光部の出力信号から被検知物の含水分を判
断すればよいが、被検知物の水分以外の要因による影響
を補正するために光源から2波長以上の赤外光、例えば
水の吸収波長域の光と、水の吸収波長域より短波長側の
光と、水の吸収波長域より長波長側の光を照射し、それ
らの反射光を別々に受光部で受光して受光部の出力信号
から被検知物の含水分を判断する方法がある。In this moisture-containing detector, infrared light having two wavelengths, that is, infrared light in a wavelength range absorbed by water and infrared light in a comparative wavelength range in which water absorption is small, are emitted from a light source. It suffices to irradiate the object to be detected, receive the reflected light at the light receiving section consisting of a light receiving element, and judge the water content of the object to be detected from the output signal of the light receiving section. In order to correct the above, infrared light with two or more wavelengths, for example, light in the absorption wavelength range of water, light on the shorter wavelength side than the absorption wavelength range of water, and light on the longer wavelength side than the absorption wavelength range of water are corrected from the light source. There is a method of irradiating and receiving the reflected light separately by the light receiving unit and determining the water content of the detected object from the output signal of the light receiving unit.
【0004】また、特開昭55ー29726号公報に
は、複数のフィルタを有するターレット式のセクタを回
転させて共通の光源からの光をその複数のフィルタで順
次に各波長の光に分離し、これらの分離された各波長の
光を受光部で受光して受光部の出力信号から被検知物の
含水分を判断する赤外線による水分測定方法が記載され
ている。この水分測定方法においては、中間の波長域の
光が必要である場合には、ターレット式のセクタ内にそ
の中間の波長域の光を分離するフィルタを増設すること
で対応している。Further, in Japanese Patent Application Laid-Open No. 55-29726, a turret type sector having a plurality of filters is rotated so that light from a common light source is sequentially separated into light of each wavelength by the plurality of filters. , A method of measuring water content by infrared rays in which light of each of these separated wavelengths is received by a light receiving section and the water content of an object to be detected is judged from an output signal of the light receiving section. In this moisture measuring method, when light in the intermediate wavelength range is required, a filter for separating the light in the intermediate wavelength range is added in the turret type sector.
【0005】また、被検知物に順次に光を照射する、発
光波長の異なる複数の発光部と、被検知物からの反射光
を受光する受光部とを有する含水分検知装置において、
前記複数の発光部の順次発光動作に基づいて前記受光部
から複数の受光信号を取り込み、この複数の受光信号の
比較から予め設定された値をもとに被検知物の含水分を
判断する制御部を備えたことを特徴とする含水分検知装
置が提案されている。Further, in a moisture-containing detecting device having a plurality of light emitting parts having different emission wavelengths for sequentially irradiating the object to be detected with light and a light receiving part for receiving reflected light from the object to be detected,
Control for fetching a plurality of light receiving signals from the light receiving unit based on the sequential light emitting operation of the plurality of light emitting units and judging the moisture content of the detected object based on a preset value from the comparison of the plurality of light receiving signals. There has been proposed a moisture content detection device characterized by including a portion.
【0006】[0006]
【発明が解決しようとする課題】上記含水分検知装置で
は、受光部は水の吸収波長域の前後における比較波長の
全てに対して均等な受光感度を有する受光部を選択しな
いと、水分以外の要因により被検知物の含水分を精度良
く判断するのが困難であった。また、上記赤外線による
水分測定方法では、複数のフィルタを有するターレット
式のセクタや可動部を有する装置にて実施するので、装
置全体が大型化しやすく、水分測定の高速化が困難であ
った。In the above-described moisture-containing detector, the light receiving section must be selected so as to have uniform light receiving sensitivity for all comparison wavelengths before and after the absorption wavelength range of water. It was difficult to accurately determine the water content of the detected object due to the factors. Further, in the above-mentioned infrared moisture measuring method, since it is carried out by a device having a turret type sector having a plurality of filters and a movable part, the whole device tends to be large, and it is difficult to speed up moisture measurement.
【0007】上記複数の発光部が順次発光動作を行う含
水分検知装置では、上記複数の発光部から被検知物に照
射する光と波長の異なる光を必要とする場合には、その
都度発光部を増設しなければならなかった。In the moisture-containing detection device in which the plurality of light emitting units sequentially emit light, when light having a different wavelength from the light emitted from the plurality of light emitting units to the object to be detected is required, the light emitting unit is provided each time. Had to expand.
【0008】また、上記含水分検知装置では、被検知物
の水分以外の要因による影響を補正するために光源から
2波長以上の赤外光、例えば水の吸収波長域の光と、水
の吸収波長域より短波長側の光と、水の吸収波長域より
長波長側の光を照射し、その反射光を別々に受光部で受
光して受光部の出力信号から被検知物の含水分を判断す
る場合には、水の吸収波長域の両側の光を照射する2つ
の発光部は波長差が同じになるような発光分布を持つも
のを選択することが望ましいが、発光部の発光分布特性
は部品毎に異なり、水の吸収波長域の光を照射する発光
部の発光分布に対して波長差が同じになるような発光分
布を持つ2つの発光部を組み合わせて選択するのは困難
であった。Further, in the above-mentioned water content detecting device, in order to correct the influence of factors other than the water content of the object to be detected, infrared light of two or more wavelengths, for example, light in the water absorption wavelength range and water absorption Light with a wavelength shorter than the wavelength range and light with a wavelength longer than the absorption wavelength range of water are radiated, and the reflected light is received separately by the light receiving section, and the moisture content of the detected object is detected from the output signal of the light receiving section. When making a decision, it is desirable to select two light emitting parts that radiate light on both sides of the water absorption wavelength range so as to have an emission distribution with the same wavelength difference. Is different for each component, and it is difficult to select by combining two light-emitting units that have the same emission difference as the emission distribution of the emission unit that irradiates light in the absorption wavelength range of water. It was
【0009】本発明は、被検知物の含水分以外の要因に
影響されずに被検知物の含水分を迅速に精度良く判断す
ることができて小型化及び低コスト化が可能となる含水
分検知装置を提供することを目的とする。According to the present invention, the moisture content of a detected object can be quickly and accurately determined without being affected by factors other than the moisture content of the detected object, thereby enabling downsizing and cost reduction. An object is to provide a detection device.
【0010】[0010]
【課題を解決するための手段】上記目的を達成するた
め、請求項1に係る発明は、被検知物に順次に光を照射
する発光波長の異なる複数の発光部と、被検知物からの
反射光を受光する受光部とを具備し、前記複数の発光部
は、被検知物に関して前記受光部と所定の角度で配置さ
れて被検知物に順次に光を照射する点灯動作を行い、水
の吸収波長域に発光分布を持つ第1の発光部と、水の吸
収波長域より短波長側もしくは長波長側に発光分布を持
つ第2の発光部とを有する含水分検知装置において、前
記第1の発光部の点灯動作時における前記受光部の出力
信号と、前記第1の発光部及び前記第2の発光部の点灯
動作時における前記受光部の出力信号と、前記第2の発
光部の点灯動作時における前記受光部の出力信号とをも
とに所定の演算を行い、この演算結果と予め設定された
値をもとに被検知物の含水分を判断する制御部を備えた
ものであり、少ない発光部で受光部から多くの受光信号
を得ることができて被検知物の含水分以外の要因に影響
されずに被検知物の含水分を迅速に精度良く判断するこ
とができ、小型化及び低コスト化が可能となる。In order to achieve the above object, the invention according to claim 1 is to provide a plurality of light emitting portions having different emission wavelengths for sequentially irradiating the object to be detected with light and reflection from the object to be detected. A plurality of light emitting units, which are arranged at a predetermined angle with respect to the object to be detected and perform a lighting operation of sequentially irradiating the object with light, A moisture-containing detection device comprising: a first light emitting portion having a light emission distribution in an absorption wavelength region, and a second light emitting portion having a light emission distribution in a shorter wavelength side or a longer wavelength side than an absorption wavelength region of water. Output signal of the light receiving unit during the lighting operation of the light emitting unit, output signal of the light receiving unit during the lighting operation of the first light emitting unit and the second light emitting unit, and lighting of the second light emitting unit Perform predetermined calculation based on the output signal of the light receiving part during operation It is equipped with a control unit that determines the moisture content of the object to be detected based on the calculation result and a preset value, and a large number of light receiving signals can be obtained from the light receiving unit with a small number of light emitting units. The moisture content of the object to be detected can be quickly and accurately determined without being affected by factors other than the moisture content of the object to be detected, and downsizing and cost reduction can be achieved.
【0011】請求項2に係る発明は、被検知物に順次に
光を照射する発光波長の異なる複数の発光部と、被検知
物からの反射光を受光する受光部とを具備し、前記複数
の発光部は、被検知物に関して前記受光部と所定の角度
で配置されて被検知物に順次に光を照射する点灯動作を
行い、水の吸収波長域に発光分布を持つ第1の発光部
と、水の吸収波長域より短波長側に発光分布を持つ第2
の発光部と、水の吸収波長域より長波長側に発光分布を
持つ第3の発光部とを有する含水分検知装置において、
前記第1の発光部の点灯動作時における前記受光部の出
力信号と、前記第1の発光部及び前記第2の発光部の点
灯動作時における前記受光部の出力信号と、前記第2の
発光部の点灯動作時における前記受光部の出力信号と、
前記第2の発光部及び前記第3の発光部の点灯動作時に
おける前記受光部の出力信号と、前記第3の発光部の点
灯動作時における前記受光部の出力信号とをもとに所定
の演算を行い、この演算結果と予め設定された値をもと
に被検知物の含水分を判断する制御部を備えたものであ
り、少ない発光部で受光部から多くの受光信号を得るこ
とができて被検知物の含水分以外の要因に影響されずに
被検知物の含水分を迅速に精度良く判断することがで
き、小型化及び低コスト化が可能となる。According to a second aspect of the present invention, a plurality of light emitting portions having different emission wavelengths for sequentially irradiating the detected object with light and a light receiving portion for receiving the reflected light from the detected object are provided. The first light emitting unit is disposed at a predetermined angle with respect to the light receiving unit with respect to the detected object, performs a lighting operation of sequentially irradiating the detected object with light, and has a light emission distribution in the absorption wavelength range of water. And a second emission distribution with a shorter wavelength side than the absorption wavelength range of water
And a third light emitting part having a light emission distribution on a wavelength side longer than the absorption wavelength range of water,
An output signal of the light receiving unit during the lighting operation of the first light emitting unit, an output signal of the light receiving unit during the lighting operation of the first light emitting unit and the second light emitting unit, and the second light emission An output signal of the light receiving section during the lighting operation of the section,
A predetermined signal is output based on the output signal of the light receiving unit during the lighting operation of the second light emitting unit and the third light emitting unit and the output signal of the light receiving unit during the lighting operation of the third light emitting unit. It is equipped with a control unit that performs a calculation and determines the moisture content of the object to be detected based on the calculation result and a preset value. It is possible to obtain many light reception signals from the light reception unit with a small number of light emission units. As a result, the moisture content of the detected object can be quickly and accurately determined without being affected by factors other than the moisture content of the detected object, and downsizing and cost reduction can be achieved.
【0012】請求項3に係る発明は、請求項2記載の含
水分検知装置において、前記第1の発光部は水の吸収波
長域の1.45μmに分光感度のピークを有する発光分
布を持つ発光部からなり、前記第2の発光部は水の吸収
波長域より短波長側の1.3μmに分光感度のピークを
有する発光分布を持つ発光部からなり、前記第3の発光
部は水の吸収波長域より長波長側の1.55μmに分光
感度のピークを有する発光分布を持つ発光部からなるも
のであり、少ない発光部で受光部から多くの受光信号を
得ることができて被検知物の含水分以外の要因に影響さ
れずに被検知物の含水分を迅速に精度良く判断すること
ができ、小型化及び低コスト化が可能となる。According to a third aspect of the present invention, in the moisture content detecting apparatus according to the second aspect, the first light emitting portion has a light emission distribution having a spectral sensitivity peak at 1.45 μm in a water absorption wavelength range. The second light emitting portion has a light emitting portion having a light emission distribution having a peak of spectral sensitivity at 1.3 μm on the shorter wavelength side than the absorption wavelength range of water, and the third light emitting portion absorbs water. It is composed of a light emitting portion having a light emission distribution having a peak of spectral sensitivity at 1.55 μm on the longer wavelength side than the wavelength range, and a large number of light receiving signals can be obtained from the light receiving portion with a small number of light emitting portions, and the detected object can be detected. The moisture content of the object to be detected can be quickly and accurately determined without being affected by factors other than the moisture content, and downsizing and cost reduction can be achieved.
【0013】請求項4に係る発明は、請求項2または3
記載の含水分検知装置において、前記複数の発光部の光
照射角度を長波長側の光ほど光軸角度が大きくなるよう
にしたものであり、複数の発光部から発光波長の異なる
光が同じ光軸角度で被検知物に照射された場合に長波長
側の光ほど被検知物に浸透してその反射光量に違いが生
じたとしてもその影響を最小限にできる。The invention according to claim 4 is the invention according to claim 2 or 3.
In the moisture content detection device according to the description, the light irradiation angle of the plurality of light emitting units is such that the optical axis angle becomes larger as the light on the longer wavelength side, and the light having different emission wavelengths from the plurality of light emitting units is the same light. Even if the longer-wavelength side light penetrates into the object to be detected when the object to be detected is irradiated at the axial angle, the influence can be minimized even if there is a difference in the amount of reflected light.
【0014】[0014]
【発明の実施の形態】図1は請求項2〜4に係る発明の
一実施形態を示す。この実施形態の含水分検知装置1
は、各々近赤外光を発光する発光ダイオードからなる複
数の発光部2〜4と、受光部5と、この受光部5からの
受光信号を増幅する増幅回路6とにより構成された検知
部7、発光駆動部8、制御部9、入力部10、出力部1
1及び表示部12を備え、検知位置の被検知物13の水
分率(含水分)を検知する。制御部9は、CPU14、
ROM15、RAM16、I/O17を用いて構成され
る。なお、複数の発光部を1つのケースに納めること
で、検知部7の小型化、低コスト化を図ることができ
る。1 shows an embodiment of the invention according to claims 2-4. Moisture-containing detector 1 of this embodiment
Is a detection unit 7 including a plurality of light emitting units 2 to 4 each configured of a light emitting diode that emits near infrared light, a light receiving unit 5, and an amplifier circuit 6 that amplifies a light receiving signal from the light receiving unit 5. , Light emission drive unit 8, control unit 9, input unit 10, output unit 1
1 and the display unit 12 are provided to detect the moisture content (moisture content) of the detection object 13 at the detection position. The control unit 9 includes a CPU 14,
The ROM 15, the RAM 16, and the I / O 17 are used. By housing the plurality of light emitting units in one case, the size and cost of the detection unit 7 can be reduced.
【0015】図2に示すように発光ダイオード2〜4は
互いに発光波長が異なり、発光ダイオード2は水が吸収
する波長域(水の吸収波長域)より短波長側に発光分布
を持っていて1.3μmに分光感度のピークを有する。
発光ダイオード3は水が吸収する波長域に発光分布を持
っていて1.45μmに分光感度のピークを有し、発光
ダイオード4は水が吸収する波長域より長波長側に発光
分布を持っていて1.55μmに分光感度のピークを有
する。受光部5は、InGaAs系の受光素子からな
り、0.7μm〜1.7μmに受光感度を持つ。As shown in FIG. 2, the light emitting diodes 2 to 4 have different emission wavelengths from each other, and the light emitting diode 2 has a light emission distribution on a shorter wavelength side than a wavelength range where water is absorbed (water absorption wavelength range). It has a spectral sensitivity peak at 0.3 μm.
The light emitting diode 3 has an emission distribution in the wavelength range absorbed by water and has a spectral sensitivity peak at 1.45 μm, and the light emitting diode 4 has an emission distribution in the longer wavelength side than the wavelength range absorbed by water. It has a peak of spectral sensitivity at 1.55 μm. The light receiving portion 5 is composed of an InGaAs light receiving element and has a light receiving sensitivity of 0.7 μm to 1.7 μm.
【0016】受光部5は、被検知物13における検知面
の法線上で、発光ダイオード2〜4からの異なる光軸角
度の反射光を受光するように配置されている。発光ダイ
オード3は被検知物13における検知面の法線に対する
光軸角度が30度ほどになるように配置され、発光ダイ
オード2、4は被検知物13における検知面の法線に対
する光軸角度が25〜35度になるように1つの容器7
a内に配置される。なお、発光ダイオード2、4は、詳
しくは図1に示すように被検知物13における検知面の
法線に対して所定の1方向について同じ光軸角度であ
り、図3に示すように被検知物13における検知面の法
線に対してその1方向と直角な方向についての各光軸角
度θ1、θ2が異なる。The light receiving portion 5 is arranged so as to receive the reflected light of different optical axis angles from the light emitting diodes 2 to 4 on the normal line of the detection surface of the object to be detected 13. The light emitting diodes 3 are arranged so that the optical axis angle with respect to the normal line of the detection surface of the detected object 13 is about 30 degrees, and the light emitting diodes 2 and 4 have the optical axis angle with respect to the normal line of the detection surface of the detected object 13. One container 7 at 25-35 degrees
It is placed in a. The light emitting diodes 2 and 4 have the same optical axis angle in a predetermined one direction with respect to the normal line of the detection surface of the object to be detected 13 as shown in FIG. 1, and as shown in FIG. The optical axis angles θ 1 and θ 2 in a direction perpendicular to the normal to the detection surface of the object 13 are different.
【0017】発光ダイオード2〜4は発光駆動部8によ
り順次に駆動されて光を検知位置の被検知物13に照射
し、受光部5は検知位置の被検知物13からの反射光を
受光する。この受光部5の出力信号は、増幅回路6によ
り増幅され、制御部9のA/D変換部に入力されてA/
D変換される。図4〜図6は本実施形態の動作フローを
示し、図7は本実施形態の動作タイミングを示す。な
お、図7において、LEDは発光ダイオード、PDは受
光部を示す。The light emitting diodes 2 to 4 are sequentially driven by the light emission drive section 8 to irradiate the detected object 13 at the detection position with light, and the light receiving section 5 receives the reflected light from the detected object 13 at the detection position. . The output signal of the light receiving unit 5 is amplified by the amplifier circuit 6 and input to the A / D conversion unit of the control unit 9 to be converted into A / D.
D converted. 4 to 6 show the operation flow of this embodiment, and FIG. 7 shows the operation timing of this embodiment. In FIG. 7, LED indicates a light emitting diode and PD indicates a light receiving portion.
【0018】本実施形態では、図4に示すように電源が
オンされると、制御部9は、ROM15内に記憶されて
いるプログラムに従って初期設定の診断処理を行い、そ
の結果を出力部10に被検知物13の検知可能又は異常
として表示させる。制御部9は、含水分検知プログラム
に従い、入力部10からの含水分検知開始信号をもとに
まず発光部2〜4を動作させずに受光部5の出力信号を
増幅回路6を介して取り込んでA/D変換し、それを検
知信号PD0とする。In the present embodiment, when the power is turned on as shown in FIG. 4, the control section 9 carries out an initial setting diagnostic process in accordance with a program stored in the ROM 15, and the result is output to the output section 10. The detected object 13 is displayed as being detectable or abnormal. According to the moisture content detection program, the control unit 9 takes in the output signal of the light receiving unit 5 via the amplifier circuit 6 based on the moisture content detection start signal from the input unit 10 without operating the light emitting units 2 to 4. A / D conversion is carried out and is used as a detection signal PD0.
【0019】続いて、制御部9は、発光駆動部8に発光
信号を与えて発光部2〜4を順次に発光させ、その発光
信号に同期して受光部5の出力信号を増幅回路6を介し
て間欠的に取り込む。すなわち、制御部9は、まず、発
光部2を点灯させ、発光部2から照射されて受光部5で
受光された光に対する受光部5の出力信号を増幅回路6
を介して取り込んでA/D変換し、それを検知信号PD
1として直ちに先に取り込んでA/D変換した検知信号
PD0を減算してPD1=PD1−PD0とする。Subsequently, the control unit 9 gives a light emission signal to the light emission drive unit 8 to sequentially cause the light emission units 2 to 4 to emit light, and outputs the output signal of the light reception unit 5 to the amplification circuit 6 in synchronization with the light emission signal. Take in intermittently through. That is, the control unit 9 first turns on the light emitting unit 2 and outputs the output signal of the light receiving unit 5 with respect to the light emitted from the light emitting unit 2 and received by the light receiving unit 5, to the amplifier circuit 6.
Captured via A, converted into A / D, and detected as PD
The detection signal PD0 which has been immediately fetched and A / D converted is set to 1 and PD1 = PD1−PD0 is set.
【0020】次に、制御部9は、発光部3を点灯させ、
発光部2、3から照射されて受光部5で受光された光に
対する受光部5の出力信号を増幅回路6を介して取り込
んでA/D変換し、それを検知信号PD2として直ちに
先に取り込んでA/D変換した検知信号PD0を減算し
てPD2=PD2−PD0とする。次に、制御部9は、
発光部2を消灯させ、発光部3から照射されて受光部5
で受光された光に対する受光部5の出力信号を増幅回路
6を介して取り込んでA/D変換し、それを検知信号P
D3として直ちに先に取り込んでA/D変換した検知信
号PD0を減算してPD3=PD3−PD0とする。Next, the control section 9 turns on the light emitting section 3,
The output signal of the light receiving unit 5 with respect to the light emitted from the light emitting units 2 and 3 and received by the light receiving unit 5 is taken in through the amplifier circuit 6 and A / D converted, and is immediately taken in first as the detection signal PD2. The A / D-converted detection signal PD0 is subtracted to set PD2 = PD2-PD0. Next, the control unit 9
The light emitting unit 2 is turned off, and the light receiving unit 5 is irradiated by the light emitting unit 3.
The output signal of the light-receiving unit 5 for the light received by is taken in through the amplifier circuit 6 and A / D converted, and this is detected signal P.
Immediately as D3, the detection signal PD0 which has been previously fetched and A / D converted is subtracted to set PD3 = PD3-PD0.
【0021】次に、制御部9は、発光部4を点灯させ、
発光部3、4から照射されて受光部5で受光された光に
対する受光部5の出力信号を増幅回路6を介して取り込
んでA/D変換し、それを検知信号PD4として直ちに
先に取り込んでA/D変換した検知信号PD0を減算し
てPD4=PD4−PD0とする。次に、制御部9は、
発光部3を消灯させ、発光部4から照射されて受光部5
で受光された光に対する受光部5の出力信号を増幅回路
6を介して取り込んでA/D変換し、それを検知信号P
D5として直ちに先に取り込んでA/D変換した検知信
号PD0を減算してPD5=PD5−PD0とする。Next, the control section 9 turns on the light emitting section 4,
The output signal of the light receiving portion 5 for the light emitted from the light emitting portions 3 and 4 and received by the light receiving portion 5 is taken in through the amplifier circuit 6 and A / D converted, and is immediately taken in first as the detection signal PD4. The A / D-converted detection signal PD0 is subtracted to set PD4 = PD4-PD0. Next, the control unit 9
The light emitting section 3 is turned off, and the light receiving section 5 is illuminated by the light emitting section 4.
The output signal of the light-receiving unit 5 for the light received by is taken in through the amplifier circuit 6 and A / D converted, and this is detected signal P.
Immediately as D5, the detection signal PD0 which has been previously fetched and A / D converted is subtracted to set PD5 = PD5-PD0.
【0022】次に、制御部9は、発光部4を消灯させ、
以下同様な動作を繰り返して行なわせて発光部2〜4の
順次点灯が何回目であるかを示すn回信号を生成する。
制御部9は、発光部2〜4の順次点灯がn回に達してn
回信号がnになると、検知信号をPD1からPD5まで
RAM16に記憶する。被検知物13の含水分検知プロ
セスの1回毎に6個の検知信号PD0〜PD5がデータ
として得られ、この含水分検知プロセスのn回の繰り返
しでは6個のデータPD0〜PD5のn倍、即ち、6n
個のデータが得られる。制御部9は、含水分検知プロセ
スのn回の繰り返しの終了とともに、その6n個のデー
タをRAM16に記憶する。Next, the control section 9 turns off the light emitting section 4,
After that, the same operation is repeated to generate an n-th time signal indicating how many times the light emitting units 2 to 4 are sequentially turned on.
The control unit 9 controls the light-emitting units 2 to 4 to sequentially turn on n times,
When the turn signal becomes n, the detection signals from PD1 to PD5 are stored in the RAM 16. Six detection signals PD0 to PD5 are obtained as data every time the moisture content detection process of the object to be detected 13 is repeated n times of the moisture content detection process. That is, 6n
Data are obtained. The control unit 9 stores the 6n pieces of data in the RAM 16 when the moisture content detection process is repeated n times.
【0023】被検知物13の含水分はn回の検知とその
平均化で検知精度の向上を図っている。制御部9は、n
回分の検知信号PD1〜PD5を平均化してPD1〜P
D5の各平均値ΣPD1/n、ΣPD2/n、ΣPD3
/n、ΣPD4/n、ΣPD5/nを求め、それらの平
均値をPD1n〜PD5nとして
[{(PD1n+PD5n)/2}/PD3n]×(P
D2n/PD4n)
なる演算式で演算を実行し、この演算結果から、ROM
15内に予め設定されている被検知物13の含水分率%
と上記演算式の演算結果との関係を示すテーブルデータ
に基づいて被検知物13の含水分率%を判断して決定す
る。The moisture content of the object to be detected 13 is detected n times and averaged to improve the detection accuracy. The control unit 9
PD1 to P5 by averaging the detection signals PD1 to PD5
D5 average values ΣPD1 / n, ΣPD2 / n, ΣPD3
/ N, ΣPD4 / n, ΣPD5 / n are obtained, and the average value of them is set as PD1n to PD5n [{(PD1n + PD5n) / 2} / PD3n] × (P
D2n / PD4n) is used to execute the operation, and the ROM is calculated from the operation result.
Moisture content% of the detected object 13 preset in 15
And the moisture content% of the object to be detected 13 are determined and determined based on table data showing the relationship between the calculation result of the above calculation formula.
【0024】この場合、制御部9は、上記PD1n〜P
D5nが被検知物13の含水分に対する検知結果である
(上記テーブルデータに基づいて被検知物13の含水分
率%を判断して決定することができる検知結果である)
か否かを判断し、上記PD1n〜PD5nが被検知物1
3の含水分に対する検知結果では無い場合には表示部1
2に異常を表示させる。In this case, the control section 9 controls the PDs 1n to P above.
D5n is the detection result for the moisture content of the detected object 13 (the detection result that can be determined by determining the moisture content% of the detected object 13 based on the table data).
It is determined whether or not PD1n to PD5n are the detected objects 1
If the detection result is not for the water content of 3, the display unit 1
Display the abnormality on 2.
【0025】また、制御部9は、上記PD1n〜PD5
nが被検知物13の含水分に対する検知結果である場合
には上記PD1n〜PD5nから上記テーブルデータに
基づいて被検知物13の含水分率%を判断して決定する
(上記PD1n〜PD5nと上記テーブルデータとの比
較で被検知物13の含水分率%を判断して決定する)。Further, the controller 9 controls the PD1n to PD5.
When n is the detection result for the moisture content of the detected object 13, the moisture content% of the detected object 13 is determined and determined from the above PD1n to PD5n based on the table data (PD1n to PD5n and the above). The moisture content% of the object to be detected 13 is judged and determined by comparison with the table data).
【0026】制御部9は、その決定した被検知物13の
含水分率%が所定の範囲にあるか否かを判断することで
被検知物13の含水分率%が正常であるか否かを判断
し、被検知物13の含水分率%が所定の範囲に無い場合
には表示部12に異常を表示させる。上記PD1n〜P
D5nが被検知物13の含水分に対する検知結果で無い
場合や被検知物13の含水分率%が所定の範囲に無い場
合としては、被検知物13と発光部2〜4との距離が適
正でないために被検知物13からの反射光を受光部5で
受光できない場合や、外乱光が強くて受光部5の出力信
号が飽和した場合、被検知物13の含水分のn回の繰り
返し検知中に被検知物13と発光部2〜4との間の距離
が変化して受光部5の出力信号が大きく変化した場合等
が考えられる。The control unit 9 judges whether or not the determined moisture content% of the detected object 13 is within a predetermined range to determine whether or not the moisture content% of the detected object 13 is normal. If the moisture content% of the object to be detected 13 is not within the predetermined range, an abnormality is displayed on the display unit 12. PD1n to P
When D5n is not the detection result for the moisture content of the detected object 13 or when the moisture content% of the detected object 13 is not within the predetermined range, the distance between the detected object 13 and the light emitting units 2 to 4 is appropriate. If the reflected light from the object to be detected 13 cannot be received by the light receiving section 5 or the output signal of the light receiving section 5 is saturated due to strong ambient light, the water content of the object to be detected 13 is repeatedly detected n times. It is possible that the distance between the object to be detected 13 and the light emitting units 2 to 4 changes and the output signal of the light receiving unit 5 changes significantly.
【0027】この被検知物13の含水分の検知におい
て、制御部9は、発光部2〜4が被検知物13に光を照
射していない状態における受光部5の出力信号を増幅回
路6を介して検知信号PD0として検知し、発光部2〜
4のうちの1つ又は2つの発光部が被検知物13に光を
照射している各状態における受光部5の出力信号を増幅
回路6を介して検知信号PD1〜PD5として検知して
検知信号PD1〜PD5から検知信号PD0を差し引く
ので、外乱光の影響や温度の影響等を排除することがで
きる。In the detection of the moisture content of the object to be detected 13, the control section 9 controls the amplifier circuit 6 to output the output signal of the light receiving section 5 when the light emitting sections 2 to 4 do not irradiate the object to be detected 13 with light. It is detected as a detection signal PD0 via
Output signals of the light receiving section 5 in each state in which one or two of the four light emitting sections irradiate the detected object 13 with light are detected as detection signals PD1 to PD5 via the amplifier circuit 6 and detected. Since the detection signal PD0 is subtracted from PD1 to PD5, the influence of ambient light, the influence of temperature, and the like can be eliminated.
【0028】また、制御部9は、上述のようにROM1
5内に予め設定されているテーブルデータに基づいて被
検知物13の含水分率%を判断して決定するが、実験で
求めた図8に示すような上記PD1n〜PD5nと被検
知物13の含水分率%との関係より回帰分析により設定
された数式、係数の外部設定があるか否かを入力部10
からの入力信号により判断する。Further, the controller 9 controls the ROM 1 as described above.
5, the moisture content% of the object to be detected 13 is determined based on the table data set in advance, and it is determined by an experiment, and the PD1n to PD5n and the object to be detected 13 shown in FIG. Input unit 10 is used to determine whether or not there is an external setting of a mathematical expression and coefficient set by regression analysis based on the relationship with the moisture content%.
Judgment based on the input signal from.
【0029】そして、制御部9は、外部設定がある場合
には、入力部10から入力される、実験で求めた上記P
D1n〜PD5nと被検知物13の含水分率%との関係
より回帰分析により設定された数式、係数のデータを取
り込んでそのデータが異常であれば表示部12に異常を
表示させ、データが異常でなければその数式、係数のデ
ータをもとに上記PD1n〜PD5nを演算して被検知
物13の含水分率%を求める。Then, the control unit 9 inputs the P value obtained from the experiment, which is input from the input unit 10 when there is an external setting.
D1n to PD5n and the moisture content% of the object to be detected 13 are taken in by the data of the formula and the coefficient set by the regression analysis, and if the data is abnormal, the abnormality is displayed on the display unit 12, and the data is abnormal. If not, the PD1n to PD5n are calculated based on the data of the mathematical expression and the coefficient, and the moisture content% of the detected object 13 is obtained.
【0030】また、制御部9は、外部から入力部10を
介して入力される指示に応じて上述の決定した被検知物
13の含水分率%を表示部12に表示させたり出力部1
1に外部へ出力させたりする。制御部9は、電源がオフ
されるまで上記動作を入力部10からの含水分検知開始
信号が入力される毎に繰り返して行う。Further, the control section 9 causes the display section 12 to display the moisture content% of the detected object 13 determined in accordance with an instruction input from the outside through the input section 10, or the output section 1.
1 to output to the outside. The control unit 9 repeats the above operation each time a moisture content detection start signal is input from the input unit 10 until the power is turned off.
【0031】ここに、被検知物13の含水分率%が4%
以下の低含水分状態になると、被検知物13の含水分に
比例して検知信号PD1n〜PD5nの変化量が小さな
値となる。被検知物13の含水分検知のタイミングには
時間的なズレがあり、検知信号PD1n〜PD5nをn
回取り込んで平均化してその誤差を小さくする工夫を行
っているが、さらに異なる波長の光を用いて検知信号P
D1n〜PD5nを検知するので、ノイズの影響や被検
知物13の表面の影響を最小限にすることができる。ま
た、発光部2、4は1つの容器7aに収納しているが、
発光部2、4を別々に配置してもよい。Here, the moisture content% of the detected object 13 is 4%.
In the following low moisture content state, the change amount of the detection signals PD1n to PD5n becomes a small value in proportion to the moisture content of the detected object 13. There is a time lag in the timing of detecting the water content of the detected object 13, and the detection signals PD1n to PD5n are set to n.
Although an attempt has been made to reduce the error by retrieving and averaging, the detection signal P is obtained by using light of different wavelengths.
Since D1n to PD5n are detected, the influence of noise and the influence of the surface of the detected object 13 can be minimized. Further, the light emitting parts 2 and 4 are housed in one container 7a,
The light emitting units 2 and 4 may be separately arranged.
【0032】このように、この実施形態は、請求項2に
係る発明の一実施形態であって、被検知物13に順次に
光を照射する発光波長の異なる複数の発光部2〜4と、
被検知物13からの反射光を受光する受光部5とを具備
し、前記複数の発光部2〜4は、被検知物13に関して
前記受光部5と所定の角度で配置されて被検知物13に
順次に光を照射する点灯動作を行い、水の吸収波長域に
発光分布を持つ第1の発光部3と、水の吸収波長域より
短波長側に発光分布を持つ第2の発光部2と、水の吸収
波長域より長波長側に発光分布を持つ第3の発光部4と
を有する含水分検知装置において、前記第1の発光部3
の点灯動作時における前記受光部5の出力信号と、前記
第1の発光部3及び前記第2の発光部2の点灯動作時に
おける前記受光部5の出力信号と、前記第2の発光部2
の点灯動作時における前記受光部5の出力信号と、前記
第2の発光部3及び前記第3の発光部4の点灯動作時に
おける前記受光部5の出力信号と、前記第3の発光部4
の点灯動作時における前記受光部5の出力信号とをもと
に所定の演算を行い、この演算結果と予め設定された値
(テーブルデータや、回帰分析により設定された数式、
係数のデータ)をもとに被検知物13の含水分を判断す
る制御部9を備えたので、少ない発光部で受光部から多
くの受光信号を得ることができて被検知物の含水分以外
の要因に影響されずに被検知物の含水分を迅速に精度良
く判断することができ、小型化及び低コスト化が可能と
なる。As described above, this embodiment is an embodiment of the invention according to claim 2, and includes a plurality of light emitting portions 2 to 4 having different emission wavelengths for sequentially irradiating the detection object 13 with light.
A plurality of light emitting units 2 to 4 are arranged at a predetermined angle with respect to the object 13 to be detected, and the object to be detected 13 is provided. The first light emitting section 3 having a light emission distribution in the water absorption wavelength range and the second light emitting section 2 having a light emission distribution in the shorter wavelength side than the water absorption wavelength range And a third light emitting section 4 having a light emission distribution on the longer wavelength side than the absorption wavelength range of water, wherein the first light emitting section 3 is provided.
Output signal of the light receiving section 5 during the lighting operation, the output signal of the light receiving section 5 during the lighting operation of the first light emitting section 3 and the second light emitting section 2, and the second light emitting section 2
Output signal of the light receiving section 5 during the lighting operation of the second light emitting section 3, the output signal of the light receiving section 5 during the lighting operation of the second light emitting section 3 and the third light emitting section 4, and the third light emitting section 4.
A predetermined calculation is performed on the basis of the output signal of the light receiving unit 5 during the lighting operation of, and the calculation result and a preset value (table data, a mathematical expression set by regression analysis,
Since the control unit 9 for determining the moisture content of the detected object 13 based on the coefficient data) is provided, a large number of light reception signals can be obtained from the light receiving section with a small number of light emitting sections, and other than the moisture content of the detected object. The moisture content of the object to be detected can be quickly and accurately determined without being affected by the above factor, and downsizing and cost reduction can be achieved.
【0033】また、この実施形態は、請求項3に係る発
明の一実施形態であって、請求項2記載の含水分検知装
置において、前記第1の発光部3は水の吸収波長域の
1.45μmに分光感度のピークを有する発光分布を持
つ発光部からなり、前記第2の発光部2は水の吸収波長
域より短波長側の1.3μmに分光感度のピークを有す
る発光分布を持つ発光部からなり、前記第3の発光部4
は水の吸収波長域より長波長側の1.55μmに分光感
度のピークを有する発光分布を持つ発光部からなるの
で、少ない発光部で受光部から多くの受光信号を得るこ
とができて被検知物の含水分以外の要因に影響されずに
被検知物の含水分を迅速に精度良く判断することがで
き、小型化及び低コスト化が可能となる。In addition, this embodiment is an embodiment of the invention according to claim 3, wherein in the moisture content detecting device according to claim 2, the first light emitting portion 3 has a water absorption wavelength range of 1 The second light emitting unit 2 has an emission distribution having a spectral sensitivity peak at 1.3 μm, which is shorter than the absorption wavelength range of water. The third light emitting unit 4 includes a light emitting unit.
Is composed of a light emitting part having a light emission distribution having a peak of spectral sensitivity at 1.55 μm on the longer wavelength side than the absorption wavelength range of water, so a large number of light receiving signals can be obtained from the light receiving part with a small number of light emitting parts. The moisture content of the object to be detected can be quickly and accurately determined without being affected by factors other than the moisture content of the object, and downsizing and cost reduction can be achieved.
【0034】また、この実施形態は、請求項4に係る発
明の一実施形態であって、請求項2または3記載の含水
分検知装置において、前記複数の発光部2、4の光照射
角度θ1、θ2を長波長側の光ほど光軸角度が大きくなる
ようにした(θ1>θ2にした)ので、複数の発光部から
発光波長の異なる光が同じ光軸角度で被検知物に照射さ
れた場合に長波長側の光ほど被検知物に浸透してその反
射光量に違いが生じたとしてもその影響を最小限にでき
る。Further, this embodiment is an embodiment of the invention according to claim 4, and in the moisture content detecting device according to claim 2 or 3, the light irradiation angle θ of the plurality of light emitting portions 2 and 4 is. 1 and θ 2 are set so that the longer the light on the longer wavelength side, the larger the optical axis angle (θ 1 > θ 2 ), so that light with different emission wavelengths from multiple light emitting parts has the same optical axis angle. Even if the longer wavelength light penetrates into the object to be detected and the difference in the reflected light amount occurs, the influence can be minimized.
【0035】また、上記実施形態においては発光部2〜
4からの3波長の光で被検知物の含水分を検知したが、
請求項1に係る発明の一実施形態では、上記実施形態に
おいて、発光部2もしくは発光部4を省略して2波長の
光で被検知物の含水分を検知する。さらに、制御部9
は、上記実施形態と同様に検知信号PD1n〜PD3n
もしくはPD3n〜PD5nを得、これらの検知信号P
D1n〜PD3nもしくはPD3n〜PD5nから
PD1n/PD3nもしくはPD5n/PD3n
なる演算式で演算を実行し、この演算結果から、ROM
15内に予め設定されている被検知物13の含水分率%
と上記演算式の演算結果との関係を示すテーブルデータ
に基づいて被検知物13の含水分率%を判断して決定す
る。In the above embodiment, the light emitting units 2 to
The moisture content of the detected object was detected with the light of 3 wavelengths from 4,
In one embodiment of the invention according to claim 1, in the above embodiment, the light emitting unit 2 or the light emitting unit 4 is omitted, and the water content of the detected object is detected with light of two wavelengths. Furthermore, the control unit 9
Are the detection signals PD1n to PD3n as in the above embodiment.
Alternatively, PD3n to PD5n are obtained, and these detection signals P
From D1n to PD3n or PD3n to PD5n, a calculation is executed by the calculation formula PD1n / PD3n or PD5n / PD3n, and from this calculation result, the ROM is read.
Moisture content% of the detected object 13 preset in 15
And the moisture content% of the object to be detected 13 are determined and determined based on table data showing the relationship between the calculation result of the above calculation formula.
【0036】また、制御部9は、外部設定がある場合に
は、入力部10から入力される、実験で求めた上記PD
1n〜PD3nもしくはPD3n〜PD5nと被検知物
13の含水分率%との関係より回帰分析により設定され
た数式、係数のデータを取り込んでそのデータをもとに
上記PD1n〜PD3nもしくはPD3n〜PD5nか
ら被検知物13の含水分率%を求める。Further, the control unit 9 inputs the above-mentioned PD obtained by experiments, which is input from the input unit 10 when there is an external setting.
1n to PD3n or PD3n to PD5n and the moisture content% of the object to be detected 13 are taken in from the above PD1n to PD3n or PD3n to PD5n based on the data of the equations and coefficients set by regression analysis. The moisture content% of the detected object 13 is obtained.
【0037】このように、請求項1に係る発明の一実施
形態では、被検知物13に順次に光を照射する発光波長
の異なる複数の発光部と、被検知物13からの反射光を
受光する受光部5とを具備し、前記複数の発光部は、被
検知物13に関して前記受光部5と所定の角度で配置さ
れて被検知物13に順次に光を照射する点灯動作を行
い、水の吸収波長域に発光分布を持つ第1の発光部3
と、水の吸収波長域より短波長側もしくは長波長側に発
光分布を持つ第2の発光部2もしくは4とを有する含水
分検知装置において、前記第1の発光部3の点灯動作時
における前記受光部5の出力信号と、前記第1の発光部
3及び前記第2の発光部2もしくは4の点灯動作時にお
ける前記受光部5の出力信号と、前記第2の発光部2も
しくは4の点灯動作時における前記受光部5の出力信号
とをもとに所定の演算を行い、この演算結果と予め設定
された値をもとに被検知物13の含水分を判断する制御
部9を備えたので、少ない発光部で受光部から多くの受
光信号を得ることができて被検知物の含水分以外の要因
に影響されずに被検知物の含水分を迅速に精度良く判断
することができ、小型化及び低コスト化が可能となる。As described above, in one embodiment of the invention according to claim 1, a plurality of light emitting portions having different emission wavelengths for sequentially irradiating the object to be detected 13 with light and the light reflected by the object to be detected 13 are received. The plurality of light emitting units are arranged at a predetermined angle with respect to the light receiving unit 5 with respect to the object to be detected 13 and perform a lighting operation of sequentially irradiating the object to be detected 13 with light. First light emitting portion 3 having an emission distribution in the absorption wavelength region of
And a second light emitting part 2 or 4 having a light emission distribution on the short wavelength side or the long wavelength side of the absorption wavelength range of water, wherein the first light emitting part 3 is operated during lighting operation. Output signal of the light receiving unit 5, output signal of the light receiving unit 5 at the time of lighting operation of the first light emitting unit 3 and the second light emitting unit 2 or 4, and lighting of the second light emitting unit 2 or 4. A control unit 9 is provided for performing a predetermined calculation based on the output signal of the light receiving unit 5 during operation and determining the water content of the object to be detected 13 based on the calculation result and a preset value. Therefore, many light receiving signals can be obtained from the light receiving unit with a small number of light emitting units, and the moisture content of the detected object can be quickly and accurately determined without being affected by factors other than the moisture content of the detected object, It is possible to reduce the size and cost.
【0038】[0038]
【発明の効果】以上のように請求項1に係る発明によれ
ば、被検知物に順次に光を照射する発光波長の異なる複
数の発光部と、被検知物からの反射光を受光する受光部
とを具備し、前記複数の発光部は、被検知物に関して前
記受光部と所定の角度で配置されて被検知物に順次に光
を照射する点灯動作を行い、水の吸収波長域に発光分布
を持つ第1の発光部と、水の吸収波長域より短波長側も
しくは長波長側に発光分布を持つ第2の発光部とを有す
る含水分検知装置において、前記第1の発光部の点灯動
作時における前記受光部の出力信号と、前記第1の発光
部及び前記第2の発光部の点灯動作時における前記受光
部の出力信号と、前記第3の発光部の点灯動作時におけ
る前記受光部の出力信号とをもとに所定の演算を行い、
この演算結果と予め設定された値をもとに被検知物の含
水分を判断する制御部を備えたので、少ない発光部で受
光部から多くの受光信号を得ることができて被検知物の
含水分以外の要因に影響されずに被検知物の含水分を迅
速に精度良く判断することができ、小型化及び低コスト
化が可能となる。As described above, according to the first aspect of the present invention, a plurality of light emitting portions having different emission wavelengths for sequentially irradiating the object to be detected with light and a light receiving device for receiving the reflected light from the object to be detected. The plurality of light emitting units are arranged at a predetermined angle with the light receiving unit with respect to the object to be detected, perform a lighting operation of sequentially irradiating the object to be detected, and emit light in a water absorption wavelength range. In a moisture-containing detection device having a first light emitting portion having a distribution and a second light emitting portion having a light emission distribution on a short wavelength side or a long wavelength side of an absorption wavelength range of water, lighting of the first light emitting portion An output signal of the light receiving portion during operation, an output signal of the light receiving portion during lighting operation of the first light emitting portion and the second light emitting portion, and the light reception during light emitting operation of the third light emitting portion Perform a predetermined calculation based on the output signal of the section,
Since the control unit that determines the moisture content of the detected object based on the calculation result and the preset value is provided, many light receiving signals can be obtained from the light receiving section with a small number of light emitting sections, and The moisture content of the object to be detected can be quickly and accurately determined without being affected by factors other than the moisture content, and downsizing and cost reduction can be achieved.
【0039】請求項2に刈る発明によれば、被検知物に
順次に光を照射する発光波長の異なる複数の発光部と、
被検知物からの反射光を受光する受光部とを具備し、前
記複数の発光部は、被検知物に関して前記受光部と所定
の角度で配置されて被検知物に順次に光を照射する点灯
動作を行い、水の吸収波長域に発光分布を持つ第1の発
光部と、水の吸収波長域より短波長側に発光分布を持つ
第2の発光部と、水の吸収波長域より長波長側に発光分
布を持つ第3の発光部とを有する含水分検知装置におい
て、前記第1の発光部の点灯動作時における前記受光部
の出力信号と、前記第1の発光部及び前記第2の発光部
の点灯動作時における前記受光部の出力信号と、前記第
2の発光部の点灯動作時における前記受光部の出力信号
と、前記第2の発光部及び前記第3の発光部の点灯動作
時における前記受光部の出力信号と、前記第3の発光部
の点灯動作時における前記受光部の出力信号とをもとに
所定の演算を行い、この演算結果と予め設定された値を
もとに被検知物の含水分を判断する制御部を備えたの
で、少ない発光部で受光部から多くの受光信号を得るこ
とができて被検知物の含水分以外の要因に影響されずに
被検知物の含水分を迅速に精度良く判断することがで
き、小型化及び低コスト化が可能となる。According to the invention of claim 2, a plurality of light emitting portions having different light emission wavelengths for sequentially irradiating the object to be detected with light,
A light-receiving unit for receiving reflected light from the object to be detected, wherein the plurality of light-emitting units are arranged at a predetermined angle with the light-receiving unit with respect to the object to be detected and sequentially illuminate the object to be detected. A first light emitting part that operates and has a light emission distribution in the water absorption wavelength range, a second light emitting part that has a light emission distribution in the shorter wavelength side than the water absorption wavelength range, and a longer wavelength than the water absorption wavelength range In a moisture content detection device having a third light emitting portion having a light emission distribution on the side, an output signal of the light receiving portion during the lighting operation of the first light emitting portion, the first light emitting portion and the second light emitting portion. Output signal of the light receiving section during lighting operation of the light emitting section, output signal of the light receiving section during lighting operation of the second light emitting section, and lighting operation of the second light emitting section and the third light emitting section The output signal of the light receiving section at the time and the lighting operation of the third light emitting section Since a predetermined calculation is performed on the basis of the output signal of the light receiving section, and a control section for judging the moisture content of the detected object based on the calculation result and a preset value is provided, a small number of light emitting sections are provided. Since many light receiving signals can be obtained from the light receiving part, the moisture content of the detected object can be quickly and accurately determined without being affected by factors other than the moisture content of the detected object, and the size and cost can be reduced. Can be realized.
【0040】請求項3に係る発明によれば、請求項2記
載の含水分検知装置において、前記第1の発光部は水の
吸収波長域の1.45μmに分光感度のピークを有する
発光分布を持つ発光部からなり、前記第2の発光部は水
の吸収波長域より短波長側の1.3μmに分光感度のピ
ークを有する発光分布を持つ発光部からなり、前記第3
の発光部は水の吸収波長域より長波長側の1.55μm
に分光感度のピークを有する発光分布を持つ発光部から
なるので、少ない発光部で受光部から多くの受光信号を
得ることができて被検知物の含水分以外の要因に影響さ
れずに被検知物の含水分を迅速に精度良く判断すること
ができ、小型化及び低コスト化が可能となる。According to the third aspect of the present invention, in the moisture content detector according to the second aspect, the first light emitting portion has an emission distribution having a spectral sensitivity peak at 1.45 μm in the water absorption wavelength range. The second light emitting portion has a light emitting portion having a light emission distribution having a peak of spectral sensitivity at 1.3 μm on the shorter wavelength side than the absorption wavelength range of water.
The light emitting part of is 1.55 μm on the longer wavelength side than the absorption wavelength range of water
Since it consists of a light emitting part having a light emission distribution having a peak of spectral sensitivity, it is possible to obtain a large number of light receiving signals from the light receiving part with a small number of light emitting parts, and to be detected without being affected by factors other than moisture content of the detected object. It is possible to quickly and accurately determine the water content of an object, which enables downsizing and cost reduction.
【0041】請求項4に係る発明によれば、請求項2ま
たは3記載の含水分検知装置において、前記複数の発光
部の光照射角度を長波長側の光ほど光軸角度が大きくな
るようにしたので、複数の発光部から発光波長の異なる
光が同じ光軸角度で被検知物に照射された場合に長波長
側の光ほど被検知物に浸透してその反射光量に違いが生
じたとしてもその影響を最小限にできる。According to the fourth aspect of the present invention, in the moisture content detecting apparatus according to the second or third aspect, the light irradiation angles of the plurality of light emitting portions are set such that the light on the longer wavelength side has a larger optical axis angle. Therefore, when light with different emission wavelengths is emitted from a plurality of light emitting parts to the detected object at the same optical axis angle, the longer wavelength light penetrates into the detected object and the amount of reflected light varies. Can minimize the effect.
【図1】請求項2〜4に係る発明の一実施形態を示すブ
ロック図である。FIG. 1 is a block diagram showing an embodiment of the invention according to claims 2-4.
【図2】同実施形態における発光部及び受光部の分光感
度を示す特性図である。FIG. 2 is a characteristic diagram showing spectral sensitivities of a light emitting unit and a light receiving unit in the same embodiment.
【図3】同実施形態の一部を示す断面図である。FIG. 3 is a cross-sectional view showing a part of the same embodiment.
【図4】同実施形態の動作フローを示すフローチャート
である。FIG. 4 is a flowchart showing an operation flow of the same embodiment.
【図5】同動作フローの一部を詳細に示すフローチャー
トである。FIG. 5 is a flowchart showing in detail a part of the same operation flow.
【図6】上記動作フローの他の一部を詳細に示すフロー
チャートである。FIG. 6 is a flowchart showing in detail another part of the above operation flow.
【図7】同実施形態の動作タイミングを示すタイミング
チャートである。FIG. 7 is a timing chart showing the operation timing of the same embodiment.
【図8】同実施形態の実験で求めた検知信号と被検知物
の含水分との関係を示す特性図である。FIG. 8 is a characteristic diagram showing the relationship between the detection signal obtained in the experiment of the same embodiment and the water content of the detected object.
1 含水分検知装置 2〜4 発光部 5 受光部 6 増幅回路 7 検知部 8 発光駆動部 9 制御部 10 入力部 11 出力部 12 表示部 13 被検知物 1 Moisture content detector 2-4 Light emitting part 5 Light receiving part 6 amplification circuit 7 Detector 8 Light emission drive 9 control unit 10 Input section 11 Output section 12 Display 13 Detected object
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) G01N 21/00 - 21/61 実用ファイル(PATOLIS) 特許ファイル(PATOLIS)─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields investigated (Int.Cl. 7 , DB name) G01N 21/00-21/61 Practical file (PATOLIS) Patent file (PATOLIS)
Claims (4)
異なる複数の発光部と、被検知物からの反射光を受光す
る受光部とを具備し、前記複数の発光部は、被検知物に
関して前記受光部と所定の角度で配置されて被検知物に
順次に光を照射する点灯動作を行い、水の吸収波長域に
発光分布を持つ第1の発光部と、水の吸収波長域より短
波長側もしくは長波長側に発光分布を持つ第2の発光部
とを有する含水分検知装置において、前記第1の発光部
の点灯動作時における前記受光部の出力信号と、前記第
1の発光部及び前記第2の発光部の点灯動作時における
前記受光部の出力信号と、前記第2の発光部の点灯動作
時における前記受光部の出力信号とをもとに所定の演算
を行い、この演算結果と予め設定された値をもとに被検
知物の含水分を判断する制御部を備えたことを特徴とす
る含水分検知装置。1. A plurality of light emitting portions having different emission wavelengths for sequentially irradiating the detected object with light, and a light receiving portion for receiving reflected light from the detected object, wherein the plurality of light emitting parts are The first light-emitting portion, which is arranged at a predetermined angle with respect to the object to be detected, performs a lighting operation of sequentially irradiating the object to be detected with light, and has an emission distribution in the absorption wavelength range of water, and an absorption wavelength of water. In a moisture-containing detection device having a second light emitting portion having a light emission distribution on a short wavelength side or a long wavelength side of a region, an output signal of the light receiving portion at the time of lighting operation of the first light emitting portion and the first light emitting portion, Predetermined calculation is performed based on the output signal of the light receiving unit during the lighting operation of the second light emitting unit and the light emitting unit and the output signal of the light receiving unit during the lighting operation of the second light emitting unit. , The moisture content of the detected object can be determined based on this calculation result and the preset value. Moisture content detecting apparatus characterized by comprising a control unit for.
異なる複数の発光部と、被検知物からの反射光を受光す
る受光部とを具備し、前記複数の発光部は、被検知物に
関して前記受光部と所定の角度で配置されて被検知物に
順次に光を照射する点灯動作を行い、水の吸収波長域に
発光分布を持つ第1の発光部と、水の吸収波長域より短
波長側に発光分布を持つ第2の発光部と、水の吸収波長
域より長波長側に発光分布を持つ第3の発光部とを有す
る含水分検知装置において、前記第1の発光部の点灯動
作時における前記受光部の出力信号と、前記第1の発光
部及び前記第2の発光部の点灯動作時における前記受光
部の出力信号と、前記第2の発光部の点灯動作時におけ
る前記受光部の出力信号と、前記第2の発光部及び前記
第3の発光部の点灯動作時における前記受光部の出力信
号と、前記第3の発光部の点灯動作時における前記受光
部の出力信号とをもとに所定の演算を行い、この演算結
果と予め設定された値をもとに被検知物の含水分を判断
する制御部を備えたことを特徴とする含水分検知装置。2. A plurality of light emitting portions having different emission wavelengths for sequentially irradiating the detected object with light and a light receiving portion for receiving reflected light from the detected object, wherein the plurality of light emitting parts are provided. The first light-emitting portion, which is arranged at a predetermined angle with respect to the object to be detected, performs a lighting operation of sequentially irradiating the object to be detected with light, and has an emission distribution in the absorption wavelength range of water, and an absorption wavelength of water. In the moisture-containing detection device having a second light emitting portion having a light emission distribution on the shorter wavelength side than the wavelength range and a third light emitting portion having a light emission distribution on the longer wavelength side than the water absorption wavelength range, the first light emission Output signal of the light receiving section during the lighting operation of the light emitting section, output signals of the light receiving section during the lighting operation of the first light emitting section and the second light emitting section, and during the lighting operation of the second light emitting section The output signal of the light receiving unit and the points of the second light emitting unit and the third light emitting unit A predetermined calculation is performed based on the output signal of the light receiving section during operation and the output signal of the light receiving section during the lighting operation of the third light emitting section, and the calculation result and a preset value are also calculated. A water content detection device, further comprising a control unit for determining the water content of the object to be detected.
前記第1の発光部は水の吸収波長域の1.45μmに分
光感度のピークを有する発光分布を持つ発光部からな
り、前記第2の発光部は水の吸収波長域より短波長側の
1.3μmに分光感度のピークを有する発光分布を持つ
発光部からなり、前記第3の発光部は水の吸収波長域よ
り長波長側の1.55μmに分光感度のピークを有する
発光分布を持つ発光部からなることを特徴とする含水分
検知装置。3. The water content detection device according to claim 2,
The first light emitting portion is composed of a light emitting portion having a light emission distribution having a peak of spectral sensitivity at 1.45 μm in the water absorption wavelength range, and the second light emitting portion is 1 on the shorter wavelength side than the water absorption wavelength range. A light emitting portion having a light emission distribution having a spectral sensitivity peak at 3 .mu.m, and the third light emitting portion having a light emission distribution having a spectral sensitivity peak at 1.55 .mu.m, which is a wavelength longer than the absorption wavelength range of water. A moisture content detecting device comprising:
おいて、前記複数の発光部の光照射角度を長波長側の光
ほど光軸角度が大きくなるようにしたことを特徴とする
含水分検知装置。4. The moisture content detecting device according to claim 2 or 3, wherein the light irradiation angles of the plurality of light emitting parts are such that the light on the longer wavelength side has a larger optical axis angle. Detection device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP02124996A JP3466360B2 (en) | 1996-02-07 | 1996-02-07 | Moisture content detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP02124996A JP3466360B2 (en) | 1996-02-07 | 1996-02-07 | Moisture content detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09210902A JPH09210902A (en) | 1997-08-15 |
JP3466360B2 true JP3466360B2 (en) | 2003-11-10 |
Family
ID=12049800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP02124996A Expired - Fee Related JP3466360B2 (en) | 1996-02-07 | 1996-02-07 | Moisture content detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3466360B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015098063A1 (en) | 2013-12-25 | 2015-07-02 | Panasonic Intellectual Property Management Co., Ltd. | Image output apparatus, image output method, and image output system, the image output comprising the detection of a specified substance in a predetermined region |
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---|---|---|---|---|
JP5155913B2 (en) * | 2009-03-18 | 2013-03-06 | トヨタ自動車株式会社 | Exhaust gas analyzer |
US10684218B2 (en) | 2017-04-11 | 2020-06-16 | Canon Kabushiki Kaisha | Moisture detecting apparatus for recording material and image forming apparatus |
-
1996
- 1996-02-07 JP JP02124996A patent/JP3466360B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015098063A1 (en) | 2013-12-25 | 2015-07-02 | Panasonic Intellectual Property Management Co., Ltd. | Image output apparatus, image output method, and image output system, the image output comprising the detection of a specified substance in a predetermined region |
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Publication number | Publication date |
---|---|
JPH09210902A (en) | 1997-08-15 |
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