JP2005024381A - Grain detector - Google Patents

Grain detector Download PDF

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Publication number
JP2005024381A
JP2005024381A JP2003189995A JP2003189995A JP2005024381A JP 2005024381 A JP2005024381 A JP 2005024381A JP 2003189995 A JP2003189995 A JP 2003189995A JP 2003189995 A JP2003189995 A JP 2003189995A JP 2005024381 A JP2005024381 A JP 2005024381A
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JP
Japan
Prior art keywords
grain
sensor
output
tank
sensor body
Prior art date
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Pending
Application number
JP2003189995A
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Japanese (ja)
Inventor
Hisashi Horio
尚志 堀尾
Tsuneo Kawamura
恒夫 川村
Koichi Shoji
浩一 庄司
Kazuo Kotake
一男 小竹
Yozaburo Narahara
陽三郎 楢原
Shigeo Zanma
茂雄 残間
Terumitsu Oya
輝光 大家
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Yanmar Co Ltd
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Yanmar Agricultural Equipment Co Ltd
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Publication date
Application filed by Yanmar Agricultural Equipment Co Ltd filed Critical Yanmar Agricultural Equipment Co Ltd
Priority to JP2003189995A priority Critical patent/JP2005024381A/en
Publication of JP2005024381A publication Critical patent/JP2005024381A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a grain detector that can detect only displacement when a grain hits, is compact, and is easily mounted on a machine. <P>SOLUTION: An armored cover 27 covers the outside of a sensor body 21, an acceleration sensor 28 is provided on a coating surface at the fixing side of a mounting bracket 25 of the sensor body 21, and the acceleration sensor 28 is mounted to detect an acceleration in a displacement direction when the grain hits against a grain detection plate 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は例えばコンバインの収穫穀物の収量などを測定する穀物検出装置に関する。
【０００２】
【従来の技術】
従来、衝撃センサに穀物が当たったときの衝撃により穀物の流量を検出する技術がある。（例えば特許文献１参照）
【０００３】
【特許文献１】特開２０００−３３３５２８
【０００４】
【発明が解決しようとする課題】
前記従来技術は、本機側の機械振動によって穀物を誤検出する不具合があり、衝撃センサによる穀物の検出精度を容易に向上させ得ない等の問題がある。
【０００５】
【課題を解決するための手段】
然るに、本発明は、請求項１の如く、可撓性金属製の拡張四角形リングセンサ本体の短尺側に歪ゲージを設け、前記センサ本体の長尺側の対向する一方の面に、穀物感圧板を固定させ、もう一方の面に取付ブラケットを固定させる穀物検出装置において、センサ本体の外側を外装カバーによって覆うと共に、センサ本体の取付ブラケット固定側の内面に加速度センサを設け、穀物感知板に穀物が当たったときの変位方向の加速度を感知するように加速度センサを取付けるもので、センサ本体及び歪ゲージ及び穀物感圧板によってロードセル方式の衝撃センサを形成し、この衝撃センサの歪ゲージを分力計とすることにより、穀物が当たったときの変位のみを検出可能にし得ると共に、加速度センサの出力によって衝撃センサの出力を補正してＳＮ比を向上させることにより、穀物の当たったときの信号を容易に取出し得、さらに衝撃センサに加速度センサを組込んで一体化することにより、コンパクトに構成し得、しかも外装カバーで覆うことにより歪ゲージの雰囲気温度の変化を低減し得、温度補償を不要にし得るものである。
【０００６】
また、請求項２の如く、センサ本体の四角リング空間部に弾性を有する軟らかい樹脂を充填するもので、歪ゲージの防水及び防塵を前記の軟らかい樹脂によって行い得、衝撃センサの出力に悪影響を与えることがなく、取付ブラケット側の本機振動によるノイズを加速度センサの出力により打ち消すように、加速度センサの出力レンジ及び位相などを調整し、穀物感圧板の垂直方向のみの出力を歪ゲージから出力させ得るものである。
【０００７】
また、請求項３の如く、揚穀筒の投出口に対向させて穀物感圧板を縦方向に長尺に形成するもので、投出口からの穀物の飛散が感圧板によって阻止されるのを横長形に比べて低減し得、タンクへの穀物の充填率が悪くなるのを防ぎ得るものである。
【０００８】
また、請求項４の如く、穀物タンクの重量を検出するタンク重量センサと衝撃センサを用いて穀物の収量を検出するもので、重量センサ出力により團場単位または満タンク単位での収量を検出させ、走行距離当たりの収量を衝撃センサによって検出させ、２つのセンサを併用して高精度に穀物収量を検出し得るものである。
【０００９】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて詳述する。図１は全体側面図、図２は同平面図であり、図中１は左右に走行クローラ２、２を装設するトラックフレーム、３は前記トラックフレーム１に固定支持する機台、４はフィードチェーン５を左側に張架し扱胴６を内蔵してなる脱穀部、７は機台３前方に昇降可能に支持させて刈刃及び穀稈搬送機構などを備える刈取部、８は前記フィードチェーン５終端に連結させる排藁チェン９の終端を臨ませる排藁カッター部、１０はコンバインの各部を駆動するエンジン、１１は揚穀筒１２を臨ませて脱穀部４から取出す穀粒を貯留する穀粒タンク、１３は運転席１４及び運転操作部１５を備える運転台であり、前記刈取部７で連続的に穀稈を刈取ると共に、この刈取穀稈を前記脱穀部４で脱穀処理するように構成している。
【００１０】
さらに、図３に示す如く、可撓性金属または合成樹脂製で拡張四角リング形のセンサ本体２１を設ける。前記センサ本体２１の四角リング形の短尺側の中央部に一対のロードセル形歪ゲージ２２を対向させて固定させ、センサ本体２１と歪ゲージ２２により分力計を形成すると共に、前記センサ本体２１の四角リング形の一方の長尺側の中央取付面硬質合成樹脂製の穀物感知板２３をビス２４止め固定させ、センサ本体２１の四角リング形のもう一方の長尺側の中央取付面に鈑金製の取付ブラケット２５をビス２６止め固定させ、前記センサ本体２１を挟んで感知板２３と取付ブラケット２５を対設させ、センサ本体２１と歪ゲージ２２と穀物感知板２３とによって衝撃センサ２９を形成する。
【００１１】
また、前記センサ本体２１の取付ブラケット２５固定部の内側面に加速度センサ２８を固定させ、加速度センサ２８を設けるセンサ本体２１の四角リング形の中空部に軟らかい樹脂を充填させるもので、図４のように、センサ本体２１と歪ゲージ２２とによって形成する分力計の歪ゲージ２２出力（図５）を分力計用ストレインアンプ３２を介して処理コントローラ３３に入力させると共に、加速度アンプ３４を介して加速度センサ２８出力（図６）を処理コントローラ３３に入力させ、歪センサ２２の機体振動によるノイズを加速度センサ２８の出力で打ち消した出力（図７）をコントローラ３３から出力させ、穀物の流量を測定する。
【００１２】
さらに、図８、図９に示す如く、穀物タンク１１の内部で、穀物を飛散させる揚穀筒１２の投出口３１に対向する位置に前記衝撃センサ２９を設け、投出口３１に穀物感圧板２３を対設させ、ロードセル方式とした衝撃センサ２９の歪ゲージ２２を分力計とすることで穀物が感圧板２３に当たったときだけ検出させ、加速度センサ２８の出力で衝撃センサ２９の出力信号を補正し、ＳＮ比を向上させて穀物の当たったときの信号を取り出すと共に、図１０のように、穀物感圧板２３を縦長の姿勢に取付け、前記投出口３１外側の横（水平）方向の飛散を確保し、感圧板２３の設置によりタンク１１への穀物充填率が低下するのを最小限にしている。
【００１３】
さらに、図８、図１１、図１２に示す如く、穀物タンク１１に穀物の水分を検出する水分センサ３５と、タンク１１の穀物重量を測定するタンク重量センサ３３を設け、図３に示す構造の歪ゲージ２２と加速度センサ２８によってタンク重量センサ３３を形成し、分力計である衝撃センサ２９及びタンク重量センサ３６の歪ゲージ２２出力をストレインアンプ３７を介してデータ処理コントローラ３８に入力させ、衝撃センサ２９及びタンク重量センサ３３の加速度センサ２８出力をアナログアンプ３９を介してデータ処理コントローラ３８に入力させ、また水分センサ３５出力をコントローラ３８に入力させるもので、タンク１１満杯時の穀物測定は重量センサ３３によって高精度に行え、穀物収集量の変化量の測定は衝撃センサ２９によって高精度に行えるから、図１３のように、単一の特定圃場または特定収穫作業（タンク１１が満杯）の穀物収穫量は重量センサ３３の出力に基づいて算出させると共に、単位走行距離当たりの穀物収集量は衝撃センサ２９の出力に基づいて算出させる。
【００１４】
なお、前記タンク１１の寸法（大きさ）を考えた場合、安定性を得るには、センサ３３自身を拡張するか、または、センサ３３を複数用意して支持してもよい。また、前記タンク１１重量出力は、機体振動によるノイズをローパスフィルタで除去し、さらに、出力の経時変化による零点ドリフトの補正を行うことにより、穀物収穫量をより適正に算出するようにしてもよい。
【００１５】
上記から明らかなように、可撓性金属または樹脂製の拡張四角形リングセンサ本体２１の短尺側に歪ゲージ２２を設け、前記センサ本体の長尺側の対向する一方の面に、穀物感圧板２３をビス２４止め固定させ、もう一方の面に取付ブラケット２５をビス２６止め固定させる穀物検出装置において、取付ブラケット（２５）に外装カバー２７を設け、センサ本体２１の外側を外装カバー２７によって覆うと共に、センサ本体２１の取付ブラケット２５固定側の内面に加速度センサ２８を設け、穀物感圧板２３に穀物が当たったときの変位方向の加速度を感知するように加速度センサ２８を取付ける。そして、センサ本体２１および歪ゲージ２２および穀物感圧板２３によってロードセル方式の衝撃センサ２９を形成し、この衝撃センサ２９の歪ゲージ２２を分力計とすることにより、穀物が当たったときの変異のみを検出可能にすると共に、前記感圧板（２３）に対して略垂直な振動方向（変位方向）が感知方向になる加速度センサ２８の出力によって衝撃センサ２９の出力を補正してＳＮ比を向上させ、穀物の当たったときの信号を取出し、さらに衝撃センサ２９に加速度センサ２８を組込んで一体化することにより、コンパクトに構成し、かつ本機への取付けを行い、しかも外装カバー２７で覆うことにより歪ゲージ２２の雰囲気温度の変化を低減させ、温度補償を不要にしている。
【００１６】
また、センサ本体２１の四角リング空間部に弾性を有する軟らかい樹脂３０を充填するもので、歪ゲージ２２の防水および防塵を前記の軟らかい樹脂によって行い、衝撃センサ２９の出力に悪影響を与えることがなく、取付ブラケット２５側の本機振動によるノイズを加速度センサ２８の出力により打ち消すように、加速度センサ２８出力レンジ及び位相などを調整し、穀物感圧板２３の垂直方向のみの出力を歪ゲージ２２から出力させる。
【００１７】
また、揚穀筒１２の投出口に対向させて穀物感圧板２３を縦方向に長尺に形成し、投出口３１からの穀物の飛散が感圧板２３によって阻止されるのを横長形に比べて低減させ、タンク１１への穀物の充填率が悪くなるのを防ぐと共に、穀物タンク１１の重量を検出するタンク重量センサ３３と衝撃センサ２９を用いて穀物の収量を検出し、重量センサ３３出力により圃場単位または満タンク単位での収量を検出させ、走行距離あたりの収量を衝撃センサ２９によって検出させ、２つのセンサ３３・２９を併用して高精度に穀物収量を検出させる。
【００１８】
さらに、図１４は図３の変形例を示すもので、感圧板（２３）に凹不（２３１）を設け、外装カバー（２７）端部を凹不（２３１）に遊嵌挿入させ、穀粒または塵などがカバー（２７）内部に入り込むのを低減させることも行える。
【００１９】
【発明の効果】
以上実施例から明らかなように本発明は、請求項１の如く、可撓性金属製の拡張四角形リングセンサ本体２１の単尺側に歪ゲージ２２を設け、前記センサ本体２１の長尺側の対抗する一方の面に、穀物感圧板２３を固定させ、もう一方の面に取付ブラケット２５を固定させる穀物検出装置において、センサ本体２１の外側を外装カバー２７によって覆うと共に、センサ本体２１の取付ブラケット２５固定側の内面に加速度センサ２８を設け、穀物感圧板２３に穀物が当たったときの変位方向の加速度を感知するように加速度センサ２８を取付けるもので、センサ本体２１及び歪ゲージ２２及び穀物感圧板２３によってロードセル方式の衝撃センサ２９を形成し、この衝撃センサ２９の歪ゲージ２２を分力計とすることにより、穀物が当たったときの変位のみを検出可能にすることができると共に、加速度センサ２８の出力によって衝撃センサ２９の出力を補正してＳＮ比を向上させることにより、穀物の当たったときの信号を容易にに取出すことができ、さらに衝撃センサ２９に加速度センサ２８を組込んで一体化することにより、コンパクトに構成でき、かつ本機への取付けを容易に行うことができ、しかも外装カバー２７で覆うことにより歪ゲージ２２の雰囲気温度の変化を低減でき、温度補償を不要にすることができるものである。
【００２０】
また、請求項２の如く、センサ本体２１の四角リング空間部に弾性を有する軟らかい樹脂３０を充填するもので、歪ゲージ２２の防水及び防塵を前記の軟らかい樹脂によって行うことができ、衝撃センサ２９の出力に悪影響を与えることなく、取付ブラケット２５側の本機振動によるノイズを加速度センサ２８の出力により打ち消すように、加速度センサ２８の出力レンジ及び位相などを調整し、穀物感圧板２３の垂直方向のみの出力を歪ゲージ２２から出力させることができるものである。
【００２１】
また、請求項３の如く、揚穀筒１２の投出口に対向させて穀物感圧板２３を縦方向に長尺に形成するもので、投出口３１からの穀物の飛散が感圧板２３によって阻止されるのを横長形に比べて低減でき、タンク１１への穀物の充填率が悪くなるのを防ぐことができるものである。
【００２２】
また、請求項４の如く、穀物タンク１１の重量を検出するタンク重量センサ３３と衝撃センサ２９を用いて穀物の収量を検出するもので、重量センサ３３出力により圃場単位又は満タンク単位での収量を検出させ、走行距離当たりの収量を衝撃センサ２９によって検出させ、２つのセンサ３３・２９を併用して高精度に穀物収量を検出させることができるものである。
【図面の簡単な説明】
【図１】コンバインの全体側面図。
【図２】同平面図。
【図３】衝撃センサ部の説明図。
【図４】センサ信号用処理回路図。
【図５】歪センサ出力線図。
【図６】加速度センサ出力線図。
【図７】補正後の出力線図。
【図８】穀物タンク部の側面図。
【図９】投出口部の説明図。
【図１０】衝撃センサ部の斜視図。
【図１１】タンク重量センサ部の説明図。
【図１２】データ処理回路図。
【図１３】処理データ出力線図。
【図１４】図３の変形例を示す説明図
【符号の説明】
１１ 穀物タンク
１２ 揚穀筒
２１ センサ本体
２２ 歪ゲージ
２３ 穀物感圧板
２５ 取付ブラケット
２７ 外装カバー
２８ 加速度センサ
２９ 衝撃センサ
３０ 軟らかい樹脂
３３ タンク重量センサ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cereal detection apparatus that measures, for example, the yield of harvested cereal grains.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a technique for detecting a grain flow rate by an impact when a grain hits an impact sensor. (For example, see Patent Document 1)
[0003]
[Patent Document 1] JP-A-2000-333528
[0004]
[Problems to be solved by the invention]
The prior art has a problem that a grain is erroneously detected by mechanical vibration on the machine side, and there is a problem that the detection accuracy of the grain by the impact sensor cannot be easily improved.
[0005]
[Means for Solving the Problems]
However, according to the present invention, as described in claim 1, a strain gauge is provided on the short side of the expanded rectangular ring sensor body made of flexible metal, and the grain pressure-sensitive plate is formed on one opposing surface on the long side of the sensor body. In the grain detection device, the outer surface of the sensor body is covered with an exterior cover, an acceleration sensor is provided on the inner surface of the sensor body on the mounting bracket fixing side, and the grain sensing plate has a grain detection plate. A load cell type impact sensor is formed by the sensor body, strain gauge and grain pressure plate, and the strain gauge of this impact sensor is connected to a force meter. By making it possible to detect only the displacement when the grain hits, the output of the impact sensor is corrected by the output of the acceleration sensor. By improving the N ratio, it is possible to easily take out the signal when it hits the grain. Furthermore, by integrating the acceleration sensor into the impact sensor, it can be made compact and covered with an exterior cover. The change in the atmospheric temperature of the strain gauge can be reduced, and temperature compensation can be made unnecessary.
[0006]
Further, as described in claim 2, the square ring space of the sensor main body is filled with a soft resin having elasticity, and the strain gauge can be waterproofed and dustproofed by the soft resin, which adversely affects the output of the impact sensor. The output range and phase of the acceleration sensor are adjusted so that the noise due to the machine vibration on the mounting bracket side is canceled by the output of the acceleration sensor, and only the vertical direction output of the grain pressure plate is output from the strain gauge. To get.
[0007]
According to a third aspect of the present invention, the grain pressure-sensitive plate is formed in the longitudinal direction so as to face the outlet of the cereal cylinder, and the pressure-sensitive plate prevents the grain from being scattered from the outlet. It can be reduced compared to the shape, and can prevent deterioration of the filling rate of grains in the tank.
[0008]
According to a fourth aspect of the present invention, the yield of the grain is detected by using a tank weight sensor for detecting the weight of the grain tank and an impact sensor. The yield per mileage can be detected by an impact sensor, and the grain yield can be detected with high accuracy by using two sensors together.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall side view, and FIG. 2 is a plan view thereof. In FIG. 1, 1 is a track frame for mounting traveling crawlers 2 and 2 on the left and right, 3 is a machine base fixedly supported on the track frame 1, and 4 is a feed A threshing unit that stretches the chain 5 on the left side and incorporates a handling cylinder 6, a mowing unit 7 that is supported so as to be movable up and down in front of the machine base 3, and that includes a cutting blade and a culm transport mechanism, 5 A waste cutter unit that faces the end of the waste chain 9 that is connected to the end, 10 is an engine that drives each part of the combine, 11 is a grain that stores the grains taken out from the threshing unit 4 while facing the milling cylinder 12 A grain tank 13 is a driver's cab provided with a driver's seat 14 and a driving operation unit 15, so that the harvesting unit 7 continuously cuts the grains and the threshing unit 4 performs the threshing process. It is composed.
[0010]
Further, as shown in FIG. 3, a sensor body 21 made of flexible metal or synthetic resin and having an expanded square ring shape is provided. A pair of load cell type strain gauges 22 are fixed to each other at the center of the rectangular ring-shaped short side of the sensor main body 21 to form a force meter with the sensor main body 21 and the strain gauge 22. One of the square ring-shaped central mounting surfaces on one long side A rigid synthetic resin grain sensing plate 23 is fixed with screws 24, and the other main ring-shaped central mounting surface of the sensor ring 21 is plated. The mounting bracket 25 is fixed to the screw 26, and the sensing plate 23 and the mounting bracket 25 are provided so as to sandwich the sensor main body 21. The sensor main body 21, the strain gauge 22, and the grain sensing plate 23 form an impact sensor 29. .
[0011]
In addition, the acceleration sensor 28 is fixed to the inner surface of the mounting bracket 25 fixing portion of the sensor body 21, and the rectangular ring-shaped hollow portion of the sensor body 21 in which the acceleration sensor 28 is provided is filled with a soft resin. In this way, the strain gauge 22 output (FIG. 5) of the force meter formed by the sensor body 21 and the strain gauge 22 is input to the processing controller 33 via the force meter strain amplifier 32 and also via the acceleration amplifier 34. The acceleration sensor 28 output (FIG. 6) is input to the processing controller 33, and the output (FIG. 7) obtained by canceling the noise due to the vibration of the airframe of the strain sensor 22 by the output of the acceleration sensor 28 is output from the controller 33. taking measurement.
[0012]
Further, as shown in FIGS. 8 and 9, the impact sensor 29 is provided inside the grain tank 11 at a position facing the outlet 31 of the cereal cylinder 12 that disperses the grain, and the grain pressure plate 23 is provided at the outlet 31. The strain gauge 22 of the impact sensor 29 of the load cell type is used as a force meter, so that it is detected only when the grain hits the pressure sensitive plate 23, and the output signal of the impact sensor 29 is output by the output of the acceleration sensor 28. Correcting and improving the signal-to-noise ratio, taking out the signal when the grain hits, and as shown in FIG. 10, the grain pressure plate 23 is mounted in a vertically long posture, and the lateral (horizontal) direction scattering outside the outlet 31 And the grain filling rate in the tank 11 is minimized by the installation of the pressure sensitive plate 23.
[0013]
Further, as shown in FIGS. 8, 11 and 12, the grain tank 11 is provided with a moisture sensor 35 for detecting grain moisture and a tank weight sensor 33 for measuring the grain weight of the tank 11, and has the structure shown in FIG. A tank weight sensor 33 is formed by the strain gauge 22 and the acceleration sensor 28, and the output of the strain gauge 22 of the impact sensor 29 and the tank weight sensor 36, which are component force meters, is input to the data processing controller 38 via the strain amplifier 37, and the impact is detected. The output of the acceleration sensor 28 of the sensor 29 and the tank weight sensor 33 is input to the data processing controller 38 via the analog amplifier 39, and the output of the moisture sensor 35 is input to the controller 38. Grain measurement when the tank 11 is full is weight. The sensor 33 can be used with high accuracy, and the change in the amount of grain collected can be measured by the impact sensor 29. Therefore, as shown in FIG. 13, the grain yield of a single specific field or specific harvesting operation (tank 11 is full) is calculated based on the output of the weight sensor 33, and the unit per mileage. The grain collection amount is calculated based on the output of the impact sensor 29.
[0014]
In consideration of the size (size) of the tank 11, in order to obtain stability, the sensor 33 itself may be expanded or a plurality of sensors 33 may be prepared and supported. Further, the weight output of the tank 11 may be calculated more appropriately by removing the noise caused by the airframe vibration with a low-pass filter and further correcting the zero point drift due to the change with time of the output. .
[0015]
As is apparent from the above, a strain gauge 22 is provided on the short side of the expanded rectangular ring sensor body 21 made of a flexible metal or resin, and the grain pressure sensitive plate 23 is provided on one opposing surface on the long side of the sensor body. In the grain detection device in which the mounting bracket 25 is fixed to the other surface with the screw 24 fixed, the exterior bracket 27 is provided on the mounting bracket (25), and the outside of the sensor body 21 is covered with the exterior cover 27. The acceleration sensor 28 is provided on the inner surface of the sensor body 21 on the fixed side of the mounting bracket 25, and the acceleration sensor 28 is attached so as to sense the acceleration in the displacement direction when the grain hits the grain pressure sensitive plate 23. Then, a load cell type impact sensor 29 is formed by the sensor main body 21, the strain gauge 22, and the grain pressure sensitive plate 23, and the strain gauge 22 of the impact sensor 29 is used as a force meter, so that only the variation when the grain hits. Can be detected, and the output of the impact sensor 29 is corrected by the output of the acceleration sensor 28 in which the vibration direction (displacement direction) substantially perpendicular to the pressure sensitive plate (23) is the sensing direction, thereby improving the SN ratio. By taking out the signal when the grain hits, and by integrating the acceleration sensor 28 into the impact sensor 29, it is compactly configured and attached to the machine, and is covered with the exterior cover 27. This reduces the change in the atmospheric temperature of the strain gauge 22 and eliminates the need for temperature compensation.
[0016]
Also, the elastic resin 30 is filled in the square ring space of the sensor body 21, and the strain gauge 22 is waterproofed and dust-proofed by the soft resin so that the output of the impact sensor 29 is not adversely affected. The output range and the phase of the acceleration sensor 28 are adjusted so that the noise caused by the vibration of the machine on the mounting bracket 25 side is canceled by the output of the acceleration sensor 28, and the output only in the vertical direction of the grain pressure plate 23 is output from the strain gauge 22. Let
[0017]
Further, the grain pressure plate 23 is formed to be long in the vertical direction so as to be opposed to the outlet of the whipping cylinder 12, and the scattering of the grain from the outlet 31 is prevented by the pressure plate 23 compared to the horizontally long shape. The yield of the grain is detected by using the tank weight sensor 33 and the impact sensor 29 for detecting the weight of the grain tank 11, and preventing the deterioration of the filling rate of the grain into the tank 11. The yield per field or full tank is detected, the yield per mileage is detected by the impact sensor 29, and the grain yield is detected with high accuracy by using the two sensors 33 and 29 in combination.
[0018]
Further, FIG. 14 shows a modification of FIG. 3, wherein the pressure-sensitive plate (23) is provided with a recess (231), and the end of the exterior cover (27) is loosely inserted into the recess (231), and the grain Or it can also reduce that dust etc. enter the cover (27) inside.
[0019]
【The invention's effect】
As apparent from the above-described embodiments, the present invention provides a strain gauge 22 on the single side of the expanded rectangular ring sensor main body 21 made of flexible metal, as described in claim 1, and is provided on the long side of the sensor main body 21. In the grain detection device in which the grain pressure plate 23 is fixed to one surface facing and the mounting bracket 25 is fixed to the other surface, the outside of the sensor body 21 is covered with an exterior cover 27 and the mounting bracket of the sensor body 21 is covered. 25. An acceleration sensor 28 is provided on the inner surface of the fixed side, and the acceleration sensor 28 is attached so as to sense the acceleration in the displacement direction when the grain hits the grain pressure plate 23. The sensor body 21, the strain gauge 22, and the grain feeling A load cell type impact sensor 29 is formed by the pressure plate 23, and the strain gauge 22 of the impact sensor 29 is used as a force meter, so that the grain hits. In addition to making it possible to detect only the displacement of the grain, the output of the impact sensor 29 is corrected by the output of the acceleration sensor 28 to improve the S / N ratio, thereby easily taking out the signal when the grain hits In addition, by integrating the acceleration sensor 28 into the impact sensor 29, it can be compactly configured and can be easily attached to the machine, and the strain gauge is covered with the exterior cover 27. Thus, the change in the atmospheric temperature 22 can be reduced, and temperature compensation can be made unnecessary.
[0020]
Further, as described in claim 2, the rectangular ring space of the sensor main body 21 is filled with a soft resin 30 having elasticity, and the strain gauge 22 can be waterproofed and dustproofed by the soft resin. The output range and phase of the acceleration sensor 28 are adjusted so that the noise caused by the vibration of the machine on the mounting bracket 25 side is canceled by the output of the acceleration sensor 28 without adversely affecting the output of the grain pressure plate 23. Only the output of the strain gauge 22 can be output.
[0021]
Further, as in claim 3, the grain pressure plate 23 is formed so as to be elongated in the vertical direction so as to face the outlet of the whipping cylinder 12, and the scattering of the grain from the outlet 31 is prevented by the pressure sensitive plate 23. Therefore, it is possible to prevent the grain filling rate of the tank 11 from being deteriorated.
[0022]
Further, according to the fourth aspect, the yield of the grain is detected by using the tank weight sensor 33 for detecting the weight of the grain tank 11 and the impact sensor 29. , And the yield per mileage can be detected by the impact sensor 29, and the grain yield can be detected with high accuracy by using the two sensors 33 and 29 in combination.
[Brief description of the drawings]
FIG. 1 is an overall side view of a combine.
FIG. 2 is a plan view of the same.
FIG. 3 is an explanatory diagram of an impact sensor unit.
FIG. 4 is a sensor signal processing circuit diagram.
FIG. 5 is a strain sensor output diagram.
FIG. 6 is an acceleration sensor output diagram.
FIG. 7 is an output diagram after correction.
FIG. 8 is a side view of a grain tank unit.
FIG. 9 is an explanatory view of the outlet part.
FIG. 10 is a perspective view of an impact sensor unit.
FIG. 11 is an explanatory diagram of a tank weight sensor unit.
FIG. 12 is a data processing circuit diagram.
FIG. 13 is a processing data output diagram.
FIG. 14 is an explanatory diagram showing a modification of FIG. 3;
11 Grain Tank 12 Flour Cylinder 21 Sensor Body 22 Strain Gauge 23 Grain Pressure Plate 25 Mounting Bracket 27 Exterior Cover 28 Acceleration Sensor 29 Impact Sensor 30 Soft Resin 33 Tank Weight Sensor

Claims (4)

可撓性金属製の拡張四角形リングセンサ本体の短尺側に歪ゲージを設け、前記センサ本体の長尺側の対向する一方の面に、穀物感圧板を固定させ、もう一方の面に取付ブラケットを固定させる穀物検出装置において、センサ本体の外側を外装カバーによって覆うと共に、センサ本体の取付ブラケット固定側の内面に加速度センサを設け、穀物感知板に穀物が当たったときの変位方向の加速度を感知するように加速度センサを取付けることを特徴とする穀物検出装置。A strain gauge is provided on the short side of the expanded quadrilateral ring sensor body made of flexible metal, the grain pressure plate is fixed to the opposite side of the long side of the sensor body, and the mounting bracket is mounted on the other side. In the grain detection device to be fixed, the outside of the sensor body is covered with an exterior cover, and an acceleration sensor is provided on the inner surface of the sensor body on the side where the mounting bracket is fixed to detect acceleration in the displacement direction when the grain hits the grain sensing plate. A grain detecting apparatus characterized by mounting an acceleration sensor as described above. センサ本体の四角リング空間部に弾性を有する軟らかい樹脂を充鎮することを特徴とする請求項１に記載の穀物検出装置。The grain detecting device according to claim 1, wherein a soft resin having elasticity is filled in the square ring space of the sensor body. 揚穀筒の投出口に対向させて穀物感圧板を縦方向に長尺に形成することを特徴とする請求項２に記載の穀物検出装置。The grain detection device according to claim 2, wherein the grain pressure plate is formed to be long in the vertical direction so as to face the outlet of the whipping cylinder. 穀物タンクの重量を検出するタンク重量センサと衝撃センサを用いて穀物の収量を検出することを特徴とする請求項３に記載の穀物検出装置。4. The grain detection apparatus according to claim 3, wherein the grain yield is detected using a tank weight sensor for detecting the weight of the grain tank and an impact sensor.
JP2003189995A 2003-07-02 2003-07-02 Grain detector Pending JP2005024381A (en)

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JP2011036193A (en) * 2009-08-12 2011-02-24 Yanmar Co Ltd Combine harvester
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WO2013012073A1 (en) * 2011-07-20 2013-01-24 ヤンマー株式会社 Combine
WO2013012080A1 (en) * 2011-07-20 2013-01-24 ヤンマー株式会社 Combine
JP2013039037A (en) * 2011-07-20 2013-02-28 Yanmar Co Ltd Combine harvester
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JP2014018119A (en) * 2012-07-13 2014-02-03 Yanmar Co Ltd Combine harvester
JP2014018118A (en) * 2012-07-13 2014-02-03 Yanmar Co Ltd Combine harvester
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