JP3167258B2 - Zero point correction method for belt feeder - Google Patents
Zero point correction method for belt feederInfo
- Publication number
- JP3167258B2 JP3167258B2 JP05639095A JP5639095A JP3167258B2 JP 3167258 B2 JP3167258 B2 JP 3167258B2 JP 05639095 A JP05639095 A JP 05639095A JP 5639095 A JP5639095 A JP 5639095A JP 3167258 B2 JP3167258 B2 JP 3167258B2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- point correction
- correction value
- zero point
- speed
- 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 - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明はベルトフィーダにおける
ゼロ点補正方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for correcting a zero point in a belt feeder.
【０００２】[0002]
【従来の技術】ベルトフィーダでの輸送利用を求める場
合には、ベルトを介して輸送重量を測定し、この輸送重
量に前記ベルトの速度を乗算して輸送量が算出されてい
る。2. Description of the Related Art In order to determine the use of transport by a belt feeder, the transport weight is measured via a belt, and the transport weight is calculated by multiplying the transport weight by the speed of the belt.
【０００３】ベルトは全周にわたって均質に作ることが
困難であるため、輸送重量の測定には、各ベルト位置で
それぞれのゼロ点誤差が発生する。そのため、従来では
次のようにして上記のゼロ点が補正されている。Since it is difficult to make a belt uniform over the entire circumference, a zero point error occurs at each belt position in measuring the transport weight. Therefore, conventionally, the above-mentioned zero point is corrected as follows.
【０００４】最初に、無負荷状態でベルトを回転させて
各ベルト位置のゼロ点補正値を記憶し、運転状態では時
々のベルト位置に応じて前記記憶したゼロ点補正値を読
み出し、このゼロ点補正値でゼロ点補正した補正重量と
時々のベルト速度とを乗算して輸送量が計算されてい
る。[0004] First, the belt is rotated in a no-load state to store the zero-point correction value of each belt position, and in the operating state, the stored zero-point correction value is read out according to the belt position at various times. The transport amount is calculated by multiplying the corrected weight obtained by zero correction with the correction value and the belt speed at each time.
【０００５】[0005]
【発明が解決しようとする課題】上記のように、ベルト
位置に応じて記憶したゼロ点補正値で時々のゼロ点補正
を実施することによって、輸送量の測定精度が向上する
が、ベルトの運転速度がゼロ点補正値の読み込み時の速
度と異なる場合には、輸送量の測定精度がそれ程向上し
ないのが現状である。As described above, by carrying out the occasional zero-point correction with the stored zero-point correction value according to the belt position, the accuracy of measuring the transport amount is improved. At present, when the speed is different from the speed at the time of reading the zero point correction value, the measurement accuracy of the transport amount does not improve so much.
【０００６】本発明は運転状態のベルト速度がゼロ点補
正値の読み込み時のベルト運転速度と異なる場合であっ
ても輸送量の測定精度の向上を実現できるゼロ点補正方
法を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a zero point correcting method which can improve the accuracy of measuring the transport amount even when the belt speed in the operating state is different from the belt operating speed at the time of reading the zero point correction value. And
【０００７】[0007]
【課題を解決するための手段】本発明のゼロ点補正方法
は、ベルトを介して輸送重量を測定し、この輸送重量に
前記ベルトの速度を乗算して輸送量を算出するに際し、
無負荷状態でベルトを基準速度で回転させて各ベルト位
置のゼロ点補正値を記憶し、運転状態では時々のベルト
位置に応じて前記記憶した基準速度でのゼロ点補正値を
読み出し、この基準速度でのゼロ点補正値をその時々の
ベルト速度に応じて補正した運転速度ゼロ点補正値を計
算し、輸送重量を運転速度ゼロ点補正値でゼロ点補正し
た補正重量と時々のベルト速度とを乗算して輸送量を計
算することを特徴とする。According to the zero point correction method of the present invention, the transport weight is measured by measuring the transport weight via a belt and multiplying the transport weight by the speed of the belt to calculate the transport quantity.
The belt is rotated at the reference speed in a no-load state, and the zero point correction value of each belt position is stored.In the operating state, the stored zero point correction value at the reference speed is read out according to the belt position at each time. Calculate the operating speed zero point correction value by correcting the zero point correction value at the speed according to the current belt speed, and correct the transport weight by the zero point correction value at the operating speed zero point correction value and the occasional belt speed. Is multiplied to calculate the transport amount.
【０００８】[0008]
【作用】この構成によると、基準速度でのゼロ点補正値
をそのまま使用するのではなくて、基準速度でのゼロ点
補正値をその時々のベルト速度に応じて補正した運転速
度ゼロ点補正値を計算し、輸送重量を運転速度ゼロ点補
正値でゼロ点補正した補正重量と時々のベルト速度とを
乗算して輸送量を計算する。According to this structure, the operating speed zero point correction value obtained by correcting the zero point correction value at the reference speed according to the belt speed at that time, instead of using the zero point correction value at the reference speed as it is. Is calculated and the transport weight is calculated by multiplying the corrected weight obtained by zero-correcting the transport weight with the operating speed zero-point correction value and the belt speed at each time.
【０００９】[0009]
【実施例】以下、本発明のゼロ点補正方法を具体的な一
実施例に基づいて説明する。図１は本発明のゼロ点補正
方法を採用したベルトウェイングフィーダを示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a zero point correction method according to the present invention will be described based on a specific embodiment. FIG. 1 shows a belt weighing feeder employing the zero point correction method of the present invention.
【００１０】ホッパー１に投入された原料を切り出すベ
ルト２は、モータ３によって回転駆動されている。モー
タ３の回転系に連結されたパルス発振器４は、ベルト２
の速度に比例した数のパルスＰを発生する。A belt 2 for cutting out the raw material put into the hopper 1 is driven to rotate by a motor 3. The pulse generator 4 connected to the rotation system of the motor 3
Generates a number of pulses P proportional to the speed of the pulse.
【００１１】ベルト２の一働長に作用する輸送重量は、
ベルト２を介してロードセル５によって測定される。ロ
ードセル５の検出重量は、減算器６を介して乗算器７に
入力され、乗算器７ではパルスＰの単位時間当たりのパ
ルス数と乗算されて瞬間輸送量が計算される。瞬間輸送
量は積算部８で積算される。The transport weight acting on the working length of the belt 2 is:
It is measured by the load cell 5 via the belt 2. The detected weight of the load cell 5 is input to the multiplier 7 via the subtractor 6, and the multiplier 7 multiplies the number of pulses of the pulse P per unit time to calculate the instantaneous transport amount. The instantaneous transport amount is integrated by the integrating unit 8.
【００１２】制御部９は、運転開始から現時点までの目
標積算重量と積算部８で求めた実際の積算重量値との差
が小さくなるようにモータ３を運転制御している。運転
状態ではスイッチ１０をオンして減算器６には時々のベ
ルト位置に応じたゼロ点補正値“ ｗ0n ”が入力され
る。The control section 9 controls the operation of the motor 3 so that the difference between the target integrated weight from the start of operation to the present time and the actual integrated weight value obtained by the integration section 8 becomes small. In the operating state, the switch 10 is turned on, and the zero point correction value “w 0n ” corresponding to the belt position is input to the subtractor 6 from time to time.
【００１３】運転に際しては、時々のベルト位置に応じ
たゼロ点補正値“ ｗ0n ”が次のようにして波形記憶
部１１に書き込まれる。このゼロ点補正値の収集時に
は、スイッチ１０をオフして減算器６に入力されるゼロ
点補正値を“ ０ ”とし、原料を輸送しない無負荷状
態でベルト２が基準速度Ｖで走行するようにモータ３を
運転する。At the time of operation, a zero point correction value "w 0n " corresponding to the occasional belt position is written in the waveform storage unit 11 as follows. At the time of collecting the zero point correction value, the switch 10 is turned off to set the zero point correction value input to the subtractor 6 to "0" so that the belt 2 runs at the reference speed V in a no-load state where no raw material is transported. Then, the motor 3 is operated.
【００１４】ベルト２が走行することによってパルス発
生器４が発生するパルスＰは、位置検出部１２で加算さ
れる。位置検出部１２の加算値Ｎは、ベルト２の適当な
位置に付された周方向で単一のマーカー１３をマーカー
センサ１４が検出するたびにゼロにリセットされる。つ
まり、位置検出部１２の加算値Ｎはベルト２の周方向の
位置に一対一で対応している。The pulse P generated by the pulse generator 4 as the belt 2 travels is added by the position detector 12. The added value N of the position detector 12 is reset to zero each time the marker sensor 14 detects a single marker 13 in the circumferential direction attached to an appropriate position of the belt 2. That is, the added value N of the position detection unit 12 corresponds one-to-one with the position of the belt 2 in the circumferential direction.
【００１５】スイッチ１０をオフ状態に切り換えた波形
記憶部１１では、リード／ライト信号１５がライト状態
になっており、ゼロ点補正値が“ ０ ”の場合の減算
器６の時々の出力が位置検出部１２の加算値Ｎに対応し
て書き込まれて記憶される。In the waveform storage section 11 in which the switch 10 is turned off, the read / write signal 15 is in the write state, and the output of the subtractor 6 when the zero point correction value is "0" is the position of the output. It is written and stored in correspondence with the added value N of the detection unit 12.
【００１６】このようにして、基準速度Ｖで走行した場
合のベルト２の全周のゼロ点補正値“ ｗ0n ”が波形
記憶部１１に収集される。図２の（ａ）に波形の一例を
示す。In this way, the zero point correction value “w 0n ” of the entire circumference of the belt 2 when the vehicle runs at the reference speed V is collected in the waveform storage unit 11. FIG. 2A shows an example of the waveform.
【００１７】運転状態では、スイッチ１０をオン状態に
切り換えてリード／ライト信号１５がリード状態に切り
換わり、補正部１６を介して減算器６には、位置検出部
１２の加算値Ｎに対応して波形記憶部１１から読み出さ
れた時々のベルト位置のゼロ点補正値“ ｗ0n ”が入
力される。In the operating state, the switch 10 is turned on to switch the read / write signal 15 to the read state, and the subtractor 6 via the correction unit 16 responds to the added value N of the position detection unit 12. Then, the zero point correction value “w 0n ” of the belt position at each time read from the waveform storage unit 11 is input.
【００１８】パルスＰで制御されている補正部１６は、
ベルト２の走行速度が基準速度Ｖの場合には“ 係数＝
１ ”で、波形記憶部１１の出力がそのまま減算器６に
ゼロ点補正値として出力される。The correction unit 16 controlled by the pulse P
When the traveling speed of the belt 2 is the reference speed V, “coefficient =
At 1 ″, the output of the waveform storage unit 11 is output to the subtractor 6 as it is as a zero point correction value.
【００１９】補正部１６は次のように構成されている。
ゼロ点補正値の収集時に、ベルト２の走行速度をＶ，２
Ｖ，３Ｖ，………に変化させて図２の（ａ），（ｂ），
（ｃ），………に示すようにゼロ点補正値を実測し、速
度変化に伴うゼロ点補正値の変化を検討して、基準速度
Ｖのゼロ点補正値を各速度でのゼロ点補正値に変換する
係数の実験式を求め、この実験式を補正部１６に書き込
んである。The correction section 16 is configured as follows.
When the zero point correction value is collected, the traveling speed of the belt 2 is set to V, 2
V, 3V,..., And FIG.
(C), the zero point correction value is actually measured as shown in..., And the change in the zero point correction value accompanying the speed change is examined. An empirical formula of a coefficient to be converted into a value is obtained, and the empirical formula is written in the correction unit 16.
【００２０】したがって、運転状態の補正部１６では、
波形記憶部１１に書き込まれている基準速度Ｖでのゼロ
点補正値が時々のベルト走行速度に応じて適切なゼロ点
補正値に補正して減算器６に供給されて正確なゼロ点補
正が実施され、輸送量の測定精度の向上を実現できる。Therefore, in the operating state correction unit 16,
The zero-point correction value at the reference speed V written in the waveform storage unit 11 is corrected to an appropriate zero-point correction value in accordance with the occasional belt traveling speed, and is supplied to the subtractor 6 so that accurate zero-point correction is performed. As a result, the measurement accuracy of the transport amount can be improved.
【００２１】なお、図３と図４は実測の結果を示す。こ
こではベルト２の一周は2050ｍｍであった。図３はベル
ト速度の違いによるゼロ点補正値波形の変化を示し、縦
軸がゼロ点補正値，横軸はベルト位置を表している。
（ａ）（ｂ）（ｃ）はそれぞれベルト速度が“ ０．１
ｍ／ｍｉｎ ”“ １．１ｍ／ｍｉｎ ”“ ５．４ｍ
／ｍｉｎ ”で、 ベルト速度が“ ０．１ｍ／ｍｉｎ
”の場合に６．０ｇのゼロ点変化はベルト速度が速く
なるに従って５．３ｇ，４．０ｇと変化した。FIGS. 3 and 4 show the results of actual measurements. Here, the circumference of the belt 2 was 2050 mm. FIG. 3 shows a change in the zero point correction value waveform due to a difference in belt speed. The vertical axis represents the zero point correction value, and the horizontal axis represents the belt position.
(A), (b) and (c) indicate that the belt speed is "0.1
m / min ”“ 1.1 m / min ”“ 5.4 m
/ Min "and the belt speed is" 0.1m / min "
In the case of "", the zero point change of 6.0 g changed to 5.3 g and 4.0 g as the belt speed increased.
【００２２】図４はベルト速度とゼロ点補正値振幅の実
測値で、無負荷状態のベルト２周分の負荷率波形をと
り、特定の波の振幅（ほぼ全体のうちの最大振幅）を調
べた。横軸がベルト速度、縦軸がゼロ点補正値振幅であ
り、ゼロ点補正値の低減率曲線はベルト速度が速くなる
に従ってゼロ点補正値振幅が小さくなることを確認でき
る。FIG. 4 shows the measured values of the belt speed and the amplitude of the zero point correction value. The load factor waveforms for two rotations of the belt in a no-load state are taken, and the amplitude of a specific wave (the maximum amplitude of almost the entirety) is examined. Was. The horizontal axis is the belt speed, and the vertical axis is the zero point correction value amplitude, and it can be confirmed that the zero point correction value amplitude decreases as the belt speed increases as the zero point correction value decreases.
【００２３】[0023]
【発明の効果】以上のように本発明のゼロ点補正方法に
よると、ベルトを介して輸送重量を測定し、この輸送重
量に前記ベルトの速度を乗算して輸送量を算出するに際
し、無負荷状態でベルトを基準速度で回転させて各ベル
ト位置のゼロ点補正値を記憶し、運転状態では時々のベ
ルト位置に応じて前記記憶した基準速度でのゼロ点補正
値を読み出し、この基準速度でのゼロ点補正値をその時
々のベルト速度に応じて補正した運転速度ゼロ点補正値
を計算し、輸送重量を運転速度ゼロ点補正値でゼロ点補
正した補正重量と時々のベルト速度とを乗算して輸送量
を計算するため、運転状態のベルト速度がゼロ点補正値
の読み込み時のベルト運転速度と異なる場合であっても
輸送量の測定精度の向上を実現できるものである。As described above, according to the zero-point correction method of the present invention, the transport weight is measured via the belt, and the transport weight is multiplied by the belt speed to calculate the transport amount. In this state, the belt is rotated at the reference speed, and the zero point correction value at each belt position is stored.In the operating state, the zero point correction value at the stored reference speed is read out according to the belt position from time to time. Calculates the operating speed zero point correction value, which is obtained by correcting the zero point correction value according to the current belt speed, and multiplies the corrected weight obtained by zeroing the transport weight with the operating speed zero point correction value and the occasional belt speed. Therefore, even when the belt speed in the operating state is different from the belt operating speed at the time of reading the zero point correction value, it is possible to improve the accuracy of measuring the transport amount.
【図１】本発明のゼロ点補正方法を採用したベルトスケ
ールの構成図である。FIG. 1 is a configuration diagram of a belt scale employing a zero point correction method of the present invention.
【図２】同実施例の補正部の動作原理の説明図である。FIG. 2 is an explanatory diagram of an operation principle of a correction unit of the embodiment.
【図３】同実施例の実測によるベルト位置−ゼロ点補正
値の関係図である。FIG. 3 is a diagram illustrating a relationship between a belt position and a zero point correction value based on an actual measurement of the embodiment.
【図４】同実施例の実測によるベルト速度−ゼロ点補正
値の関係図である。FIG. 4 is a graph showing a relationship between a measured belt speed and a zero point correction value according to the embodiment;
２ ベルト ３ モータ ４ パルス発振器 ５ ロードセル ６ 減算器 ７ 乗算器 ８ 積算部 ９ 制御部 １０ スイッチ １１ 波形記憶部 １２ 位置検出部 １３ マーカー １４ マーカーセンサ １６ 補正部 2 Belt 3 Motor 4 Pulse oscillator 5 Load cell 6 Subtractor 7 Multiplier 8 Integrator 9 Controller 10 Switch 11 Waveform storage 12 Position detector 13 Marker 14 Marker sensor 16 Corrector
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−303717（ＪＰ，Ａ) 実開 昭56−41218（ＪＰ，Ｕ) 特許2640880（ＪＰ，Ｂ２) 特公 平１−39538（ＪＰ，Ｂ２) 特公 平８−20304（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) G01G 11/00 G01G 11/12 G01G 23/01 G01G 23/37 ──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-4-303717 (JP, A) JP-A-56-41218 (JP, U) Patent 2640880 (JP, B2) JP-B1-39538 (JP, A) B2) JP 8-20304 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) G01G 11/00 G01G 11/12 G01G 23/01 G01G 23/37
Claims (1)
輸送重量に前記ベルトの速度を乗算して輸送量を算出す
るに際し、無負荷状態でベルトを基準速度で回転させて
各ベルト位置のゼロ点補正値を記憶し、運転状態では時
々のベルト位置に応じて前記記憶した基準速度でのゼロ
点補正値を読み出し、この基準速度でのゼロ点補正値を
その時々のベルト速度に応じて補正した運転速度ゼロ点
補正値を計算し、輸送重量を運転速度ゼロ点補正値でゼ
ロ点補正した補正重量と時々のベルト速度とを乗算して
輸送量を計算するベルトフィーダにおけるゼロ点補正方
法。1. A transport weight is measured via a belt, and the transport weight is multiplied by the speed of the belt to calculate a transport amount. The zero point correction value is stored, and in the operating state, the stored zero point correction value at the reference speed is read out according to the belt position from time to time, and the zero point correction value at the reference speed is read according to the belt speed at that time. A zero-point correction method for a belt feeder that calculates a corrected operating speed zero-point correction value, multiplies the corrected weight obtained by zero-correcting the transport weight with the operating speed zero-point correction value, and the occasional belt speed to calculate the transport amount. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05639095A JP3167258B2 (en) | 1995-03-16 | 1995-03-16 | Zero point correction method for belt feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05639095A JP3167258B2 (en) | 1995-03-16 | 1995-03-16 | Zero point correction method for belt feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08254455A JPH08254455A (en) | 1996-10-01 |
| JP3167258B2 true JP3167258B2 (en) | 2001-05-21 |
Family
ID=13025907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05639095A Expired - Lifetime JP3167258B2 (en) | 1995-03-16 | 1995-03-16 | Zero point correction method for belt feeder |
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| Country | Link |
|---|---|
| JP (1) | JP3167258B2 (en) |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5155601B2 (en) * | 2007-06-04 | 2013-03-06 | アンリツ産機システム株式会社 | Weight sorter |
| JP2012145393A (en) * | 2011-01-11 | 2012-08-02 | Yamato Scale Co Ltd | Weighing apparatus and semi-finished product supply system |
| JP6521225B2 (en) * | 2015-02-26 | 2019-05-29 | 大和製衡株式会社 | Transport weighing device |
-
1995
- 1995-03-16 JP JP05639095A patent/JP3167258B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102052560B1 (en) * | 2017-08-28 | 2019-12-06 | 주식회사 펜터다임 | Slim Type Computer Body Case |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08254455A (en) | 1996-10-01 |
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