JPS6138424A - Measurement of flow amount of falling matter - Google Patents

Abstract

PURPOSE:To attain to enhance measuring accuracy, by feeding back a falling speed detected between the start point of a falling flow passage and the measuring point of a pressure receiving plate as a correction value to correct impact force. CONSTITUTION:The outlet 14 of a hopper 13 receiving falling matter 10 such as polished rice is set as the start point of a falling flow passage 11 and an inclined freely rotatable pressure receiving plate 21 is provided so as to be faced to the interior of the flow passage 11 and combined with a load cell 15 to set a measuring point. The almost intermediate part between the outlet 14 and the plate 12 is set to a detection position to arrange a sensor 17 which is, in turn, cooperated with a computer 18. The impact force to the plate 12 is measured and calculated by the computer 18 and the detection value of the sensor 17 is converted to an electric signal like pulse frequency and fed back to perform correction. By this method, because impact force corresponding to initial velocity is taken out in a corrected state, an actual measured value close to a real value is obtained and measuring accuracy can be enhanced.

Description

【発明の詳細な説明】 〈発明の背景〉 この発明は粉粒体、例えば白米、玄米、小豆等の粉粒体
を含む落下物体の流量計測方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Background of the Invention> The present invention relates to a method for measuring the flow rate of a falling object containing a powder or granule such as white rice, brown rice, red beans, or the like.

〈先行技術の簡単な説明〉 落下物体の流量計測方法として従来より多くの方法が知
られており、その一つとして第４図に示す如くホッパー
１からの落差（ｈ）を利用し落下物体２の落下刃（衝撃
力）を計測して、落下物体の流量を計測する方法がある
。この計測方法は、位置のエネルギーが計測点に於ける
運動のエネルギーとして変換される・−・という前提に
基づいており、初速度を’ＯＪと考えてホッパー１の出
口３より計測点４間の落差（ｈ）で位置エネルギーをと
らえているものである。<Brief explanation of prior art> Many methods have been known to date for measuring the flow rate of a falling object. One of them, as shown in FIG. 4, uses the head (h) from the hopper 1 to There is a method to measure the flow rate of a falling object by measuring the falling blade (impact force). This measurement method is based on the premise that potential energy is converted into kinetic energy at the measurement point. Potential energy is captured by the head (h).

しかしながら、本発明者の種々の実験によれば上記の計
測方法では第５図で示す如く真値５にた　　　　−いし
て僅かなズレのある実測値６しか得れないことかねかっ
た。そしてその原因を検討したところ、落下物体２の膨
軟、摩擦係数、ホッパー１内の量の変化等により異なる
が、ホッパー１内で初速（運動エネルギー）があたえら
れており、初速値が加わった衝撃荷重の値がでてしまう
ものである・・−−・−との知見を得るに至った。However, according to various experiments conducted by the present inventors, the above measurement method sometimes yields only an actual value 6 with a slight deviation from the true value 5, as shown in FIG. When we investigated the cause of this, we found that the initial velocity (kinetic energy) was given in the hopper 1, although it varied depending on the expansion and softness of the falling object 2, the coefficient of friction, changes in the amount inside the hopper 1, etc. We have come to the conclusion that the value of the impact load is high.

〈発明の目的〉 この発明は、上記の知見にもとづきなんらかの方法で初
速を測り初速に見合う衝撃力分だけ実際の落下刃を補正
してやることにより真値に近い実測値が得られる落下物
体の流量計測方法を提供せんとしている。<Purpose of the Invention> Based on the above knowledge, the present invention provides a method for measuring the flow rate of a falling object in which an actual measured value close to the true value can be obtained by measuring the initial velocity using some method and correcting the actual falling blade by the impact force corresponding to the initial velocity. I'm trying to provide a method.

〈発明の概要〉 この発明は、落下流路の始点より受圧板の計測点間で落
下物体の落下速度を検出し、これを補正値としてフィー
ドバックして実際の衝撃力より初速に見合う衝撃力骨を
補正して計測することを要旨としている。<Summary of the Invention> This invention detects the falling velocity of a falling object between the measurement points of the pressure plate from the starting point of the falling channel, and feeds this back as a correction value to calculate the impact force commensurate with the initial velocity rather than the actual impact force. The main idea is to correct and measure the

〈実施例の説明〉 第１図乃至第３図を参照して実施例を説明すると、この
落下物体の流量計測方法は、まず落下物体ＩＯの流量を
落下流路１１中に臨ませた受圧板１２にて検出した衝撃
力より計測することを前提としている。<Description of Embodiment> To explain the embodiment with reference to FIGS. 1 to 3, this method of measuring the flow rate of a falling object first involves measuring the flow rate of the falling object IO by using a pressure receiving plate facing into the falling channel 11. It is assumed that the measurement is based on the impact force detected at step 12.

ここで落下物体１０とは、白米、玄米、小豆等の粉粒体
を含む広い概念のもので、落下流路１１とは図示の例で
は垂直流を示すもこれに限らず斜めの流路をふくむ広い
概念のものである。受圧板１２は衝撃力を計測できれば
どの様なものでもよく、図示の例では傾斜状で回転自在
な受圧板１２を採用している。Here, the falling object 10 is a broad concept that includes powder and granular materials such as white rice, brown rice, and red beans, and the falling flow path 11 is not limited to a vertical flow in the illustrated example, but is also a diagonal flow path. It is a broad concept that includes The pressure receiving plate 12 may be of any type as long as it can measure impact force, and in the illustrated example, the pressure receiving plate 12 is inclined and rotatable.

次にこの落下物体の流量計測方法は、落下流路１１０始
点より受圧板１２の計測点間で落下物体１０の落下速度
を検出するようにしている。ここでｒ始点」とは落下流
が形成されるはじめの位置を意図しているが、判りやす
くホッパー１３の出口１４としてもよい、またｒ計測点
」とは受圧板１２の臨ませである位置を意図し、この受
圧板１２にはロードセル１５が組合わせである。そして
、落下物体１０の落下速度を検出する位置は、「始点」
と「計測点」との間であればいずこでも良く、第１図で
は出口１４と受圧板１２とのほぼ中間が、また第２図で
は４５度に傾斜させた回転自在な受圧板１２ａの回転軸
１Ｇに対応する受圧板１２ａの略中央が、「検出位置」
として採用されている。Next, in this method of measuring the flow rate of a falling object, the falling speed of the falling object 10 is detected from the starting point of the falling channel 110 to the measurement points of the pressure receiving plate 12. Here, the "r starting point" is intended to be the initial position where the falling flow is formed, but for ease of understanding, it may also be the outlet 14 of the hopper 13, and the "r measuring point" is the position where the pressure receiving plate 12 faces. This pressure receiving plate 12 is combined with a load cell 15. The position at which the falling speed of the falling object 10 is detected is the "starting point".
In FIG. 1, the location is approximately halfway between the outlet 14 and the pressure receiving plate 12, and in FIG. Approximately the center of the pressure receiving plate 12a corresponding to the rotation axis 1G is the "detection position"
It is adopted as.

このような「検出位置」に配される落下速度の検出手段
としてのセンサー１７は、回転速度で落下速度を取り出
す風車のごとき翼車でもまた、光、音波等の非接触セン
サーでも良い。The sensor 17 as a means for detecting the falling speed disposed at such a "detection position" may be a blade wheel such as a windmill that extracts the falling speed based on the rotational speed, or a non-contact sensor using light, sound waves, etc.

そしてこの検出値をパルス周波数のごとき電気信号に換
えて前記受圧板■２による衝撃力の測定計算にフィード
バックするようにしている。測定計算はコンピュータ１
８でおこなうものとし、第３図で示すようにｆ−ｖコン
バータ１９で周波数を電圧に変換して補正回路２０にい
れ、ロードセル１５からの衝撃（荷重）計測値とともに
計算制御機２１にて計算制御のうえ取り出すものである
。Then, this detected value is converted into an electrical signal such as a pulse frequency and fed back to the measurement calculation of the impact force by the pressure receiving plate (2). Measurement calculation is done by computer 1
As shown in FIG. It is taken out under control.

即ち計算制御ｉ２．１では、実際の衝撃力より初速に見
合う衝撃力を補正して取り出すものである。That is, in calculation control i2.1, an impact force corresponding to the initial velocity is corrected and extracted from the actual impact force.

尚、図中２２はシャッターで、出口１４の開口度を調整
自在としており、計算制御機２１よりの電気信号に応じ
て自動調整するようにしている。In the figure, reference numeral 22 denotes a shutter, which allows the degree of opening of the exit 14 to be adjusted, and is automatically adjusted in accordance with an electrical signal from the computer controller 21.

く効　果〉 この発明によれば、落下流路の始点より受圧板の計測点
間で落下物体の落下速度を検出し、そしてこの検出値を
電気信号に換えて前記受圧板による衝撃力の測定計算に
フィードバックし、その結果実際の衝撃力より初速に見
合う衝撃力を補正して取り出すので、実測値は補正され
た分真値にちかずき落下物体の流量計測の計測精度を向
上することができるという効果がある。Effects> According to the present invention, the falling speed of a falling object is detected between the measurement points of the pressure receiving plate from the starting point of the falling channel, and this detected value is converted into an electric signal to measure the impact force by the pressure receiving plate. This is fed back to the calculation, and as a result, the impact force that is commensurate with the initial velocity is corrected and extracted from the actual impact force, so the actual measured value approaches the corrected true value, improving the accuracy of measuring the flow rate of a falling object. There is an effect.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明の落下物体の流量計測方法を概略的に
示す原理説明図、 第２図は受圧板にたいするセンサーの位置を示　　　　
　゛す概略説明図、 第３図はフィードバックの状態を示す回路説明図、 第４図は衝撃力にて落下物体の流量を計測する従来の方
法を示す原理説明図、そして 第５図は実測値と真値との関係を示すグラフである。 １０　　　落下物体 １１　　　落下流路 １２　　　受圧板 １３　　　ホッパー １５　　　ロードセル １７　　　センサー 第４図 第も図 荷重 手続補正書（自発） 昭和５９年　９月３日Fig. 1 is a principle explanatory diagram schematically showing the method of measuring the flow rate of a falling object according to the present invention, and Fig. 2 shows the position of the sensor with respect to the pressure receiving plate.
Figure 3 is a circuit diagram showing the feedback state, Figure 4 is a principle diagram showing the conventional method of measuring the flow rate of a falling object using impact force, and Figure 5 is the actual measured value. It is a graph showing the relationship between and the true value. 10 Falling object 11 Falling channel 12 Pressure receiving plate 13 Hopper 15 Load cell 17 Sensor Figure 4 also drawing loading procedure amendment (voluntary) September 3, 1982

Claims (1)

【特許請求の範囲】 落下物体の流量を落下流路中に臨ませた受圧板にて検出
した衝撃力より計測する落下物体の流量計測方法に於い
て、 前記落下流路の始点より受圧板の計測点間で落下物体の
落下速度を検出し、 この検出値を電気信号に換えて前記受圧板による衝撃力
の測定計算にフィードバックし、 実際の衝撃力より初速に見合う衝撃力を補正して計測す
る落下物体の流量計測方法。[Claims] In a method for measuring the flow rate of a falling object based on an impact force detected by a pressure receiving plate facing into a falling flow path, The falling speed of the falling object is detected between the measurement points, and this detected value is converted into an electrical signal and fed back to the impact force measurement calculation by the pressure receiving plate, and the impact force is corrected to match the initial velocity rather than the actual impact force. How to measure the flow rate of a falling object.