JPS5943732A - Control method for constant feed ware - Google Patents
Control method for constant feed wareInfo
- Publication number
- JPS5943732A JPS5943732A JP15356382A JP15356382A JPS5943732A JP S5943732 A JPS5943732 A JP S5943732A JP 15356382 A JP15356382 A JP 15356382A JP 15356382 A JP15356382 A JP 15356382A JP S5943732 A JPS5943732 A JP S5943732A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- period
- motor
- control signal
- discharging
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
Landscapes
- Control Of Conveyors (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Flow Control (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は定流星排出するコンスタントフィーメトウェア
の制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of controlling a constant meteor ware that constantly discharges meteors.
従来、コンスタントフィー/ドウエアは、計重装置(1
)を介して支持されtこ計量ホッパー(2)と、この計
量ポツパー(2)の底部に排出装置として装着された例
えば第1のスクリューフィーダ(3)と、ttl’it
ホッパー(2)に被排出物を補給する第2のスクリュー
フィーダ(4)と、前記計重装置(1)からの計重信号
をもとにモータ制御装置(5)を介して第1.第2のス
クリューフィーダ(3) (4)のモータ(6) (7
)を制御する制御装置本体(8)とから構成されている
。そして、制御装置本体(8)は、計量ポツパー(2)
内の被排出物の重量Wが第2図のように上限設定値WU
〜下限設定値wl、の間にある場合には、第2のスクリ
ューフィーダ(4)から計量ホッパー(2)への補給を
中止して、計重装置! <1)から求まる重量Wの単位
時間当りの減少重量が設定された一定排出量となるよう
にまたは排出開始からの排出総重量が目標値に近づくよ
うに、前記モータ制御装置(5)へ出力する制御信号を
調節して第1のスクリューフィーダ(3)のモータ(6
)の回転速度が制御される1:′以下、この期間を排出
期間(H)と称す〕。しかし、以下に示す時刻114〜
1oの期間には計重装置(1)の計重信号から正確な単
位時間当りの排出量が求まらないため、第1のスクリュ
ーフィーダ(3)の計重信号の減少変化に基づく制御は
時刻tLで一旦中断される。重量Wが下限設定値Wl、
に蓮する〔時刻[1、〕 と制御装置本体(8)は、第
2のスクリューフィーダ(4)から計量ホッパー(2)
へほぼ一定流量で補給が実行されるように、モータ制御
装置(5)を介して第2のスクリューフィーダ(4)の
駆動を開始する。この状態は重量Wが上限設定値wUに
達した時刻Unまで継続され、補給完了後で被排出物投
入による前記計重信号の変動が安定した時刻1゜に第1
のスクリューフィーダ(3)の制御状態かもとに戻され
る。Conventionally, constant feed/doware is weighed by a weighing device (1
), a weighing hopper (2), for example a first screw feeder (3) mounted as a discharge device at the bottom of this weighing hopper (2);
A second screw feeder (4) supplies the discharged material to the hopper (2), and a second screw feeder (4) supplies the material to be discharged to the hopper (2), and a second screw feeder (4) supplies the material to be discharged to the first screw feeder (4) via the motor control device (5) based on the weighing signal from the weighing device (1). Motor (6) (7) of second screw feeder (3) (4)
) and a control device main body (8). Then, the control device main body (8) has a weighing potper (2).
The weight W of the discharged material in the
~ lower limit set value wl, the supply from the second screw feeder (4) to the weighing hopper (2) is stopped and the weighing device! <1) Output to the motor control device (5) so that the reduced weight per unit time of the weight W determined from <1) becomes a set constant discharge amount or so that the total discharge weight from the start of discharge approaches the target value. The motor (6) of the first screw feeder (3) is
) is controlled 1:'Hereinafter, this period will be referred to as the discharge period (H)]. However, from time 114 shown below
During period 1o, the accurate discharge amount per unit time cannot be determined from the weight signal of the weighing device (1), so the control based on the decreasing change in the weight signal of the first screw feeder (3) is The process is temporarily interrupted at time tL. The weight W is the lower limit set value Wl,
At [time [1,]], the control device main body (8) moves from the second screw feeder (4) to the weighing hopper (2).
The second screw feeder (4) is started to be driven via the motor control device (5) so that replenishment is carried out at a substantially constant flow rate. This state continues until the time Un when the weight W reaches the upper limit set value wU, and after the completion of replenishment, the first
The control state of the screw feeder (3) is also returned to the original state.
なお、時刻tI、からt。までの補給期間(I)には前
述のような理由により流量制御を行うことができないた
め、従来の制御装置本体(8)は補給期間(I)に入る
と適当な排出流量となるようにモータ制御装置(5)を
介1ノで第1のスクリューフィーダ(3)のモータ(6
)を、例えば時刻t□4の駆動状態のままで時刻t。ま
でドライブするよう構成されている。Note that from time tI to t. Because flow rate control cannot be performed during the replenishment period (I) until the replenishment period (I) due to the reasons mentioned above, the conventional control device main body (8) controls the motor to maintain an appropriate discharge flow rate during the replenishment period (I). The motor (6) of the first screw feeder (3) is controlled via the control device (5).
), for example, at time t while maintaining the driving state at time t□4. Configured to drive up to.
従って、補給期間(1)の排出流量の精度は排出期間(
■1)に比べて悪く、排出期間(11)から補給期間(
1)にわたる排出流1、の精度は排出期間のそれよりも
悪化するのが現状である。Therefore, the accuracy of the discharge flow rate during the replenishment period (1) is
■It is worse than 1), from the discharge period (11) to the replenishment period (
At present, the accuracy of the discharge stream 1 over 1) is worse than that of the discharge period.
本発明は、計量ホッパー内の被排出物の重量と計量ホッ
パーに装着された排出装置の排出能力との間にほぼ一定
の傾向があることに着目して成されたものであって、計
量ポツパー内の被排出物の重量が下限設定値になるまで
は前記型f1の減少変化に応じて前記計1屋ホッパーか
ら定流呈排出されるよう排出装置への制御信号を制御す
ると共に、この排出期間中に前記制御信けを前記重量レ
ベルに対応して複数個以上記憶し、前記重量が下限設定
値に低下した時には上限設定値になるまで計量ホッパー
への前記被排出物のほぼ定流量補給を継続し、かつこの
補給期間には予め記憶されである過去の前記制御信号を
計量ホッパー内の被排出物の重量レベルに応じて順次読
み出して前記排出装置に出力することを特徴とする。The present invention has been made by focusing on the fact that there is a nearly constant tendency between the weight of the material to be discharged in the weighing hopper and the discharge capacity of the discharging device attached to the weighing hopper. Until the weight of the discharged material reaches the lower limit set value, the control signal to the discharge device is controlled so that the discharged material is discharged in a constant flow from the total 1 hopper according to the decrease in the mold f1, and this discharge is During the period, a plurality of control signals are stored corresponding to the weight level, and when the weight falls to the lower limit set value, an almost constant amount of the discharged material is replenished to the weighing hopper until the upper limit set value is reached. and during this replenishment period, the past control signals stored in advance are sequentially read out according to the weight level of the discharged material in the weighing hopper and output to the discharge device.
以下、本発明の具体的な一実施例を第8図〜第6図に基
づいて説明する。Hereinafter, a specific embodiment of the present invention will be described based on FIGS. 8 to 6.
第8図は4凰ホッパー(2)内の被排出物の重ff1w
と第1のスクリューフィーダ(3)の排出能力の関係を
8つの原料(イ)(ロ)(ハ)について測定したもので
、モータ(6)の回転速度は一定である。この第8図か
られかるように、8つの原料(イ)(ロ)(ハ)の何れ
のものも、重jtwが増加するに伴って排出能力が向上
する傾向にある。そのため、従来のように時刻t□、の
駆動の状態でモータ(6)を回転させると、補給期間(
I)では次第に流量が増加する傾向にあり、全体の制御
精度が悪化しているものである。Figure 8 shows the weight of the discharged material in the 4-hole hopper (2) ff1w
The relationship between the discharge capacity of the first screw feeder (3) and the discharge capacity of the first screw feeder (3) was measured for eight raw materials (a), (b), and (c), and the rotational speed of the motor (6) was constant. As can be seen from FIG. 8, the discharge capacity of all of the eight raw materials (a), (b), and (c) tends to improve as the weight jtw increases. Therefore, if the motor (6) is rotated in the driving state at time t□ as in the conventional case, the replenishment period (
In I), the flow rate tends to gradually increase, and the overall control accuracy deteriorates.
第4図は本発明の制御方法の一例を示す。ここでは上限
設定値WUと下限設定値wLの同の所定の設定値W1と
w2が設定されており、補給期間(1)では次のように
第1のスクリューフィーダ(3)のモータ(6)が制御
される。すなわち、時刻tLから重量Wがwlに一致し
たことを検出する時刻t3までの期間Jは現在の補給期
間(in;よ・りも過去の最新の排出期間(H)の最後
〔時刻tL、)の駆動状態のままでモータ(6)を駆動
し、時刻t8から重iwがw2に一致したことを検出す
る時刻t4までの期間には前記排出期間()1)の時刻
t2 の駆動状態でモータ(6)を駆動し、時刻t4か
ら時刻to までの期間Nは前記排出期間(H)の時
刻(lの駆動状態でモニタ(6)を駆動する。FIG. 4 shows an example of the control method of the present invention. Here, the same predetermined setting values W1 and w2 of the upper limit setting value WU and lower limit setting value wL are set, and during the replenishment period (1), the motor (6) of the first screw feeder (3) is controlled. That is, the period J from time tL to time t3 when it is detected that the weight W matches wl is the end of the current replenishment period (in; the latest discharge period (H) in the past [time tL,)] The motor (6) is driven in the driving state of time t2 of the discharge period ()1) during the period from time t8 to time t4 when it is detected that the weight iw matches w2. (6), and during the period N from time t4 to time to, the monitor (6) is driven in the driving state at time (l) of the discharge period (H).
第5図は第4図の動作を実行できる制御装置本体(8)
とその周辺の構成を示し、(9)は計重装置(1)中の
ロードセル、0IはA/Dコンバータ、Q9はCPU。Figure 5 shows the main body of the control device (8) that can execute the operations shown in Figure 4.
(9) is the load cell in the weighing device (1), 0I is the A/D converter, and Q9 is the CPU.
0はメモリ、On HはそれぞれCPU(ロ)の出力す
る制御信号をアナログ変換してモータ(6) (7)に
印加するD/Aコンバータである。なお、CPU(Iυ
には外部から上下限設定値WU # WLおよび目標流
iFとが設定されており、前記所定の設定値Wl g
W2は上下限設定値wU9wLO間を8等分して決定さ
れる。0 is a memory, and OnH is a D/A converter that converts the control signal output from the CPU (b) into analog and applies it to the motors (6) and (7). In addition, CPU (Iυ
The upper and lower limit set values WU#WL and the target flow iF are set externally, and the predetermined set value Wlg
W2 is determined by dividing the upper and lower limit set values wU9wLO into eight equal parts.
第6図はCP Uαりによる第1のスクリューフィーダ
(3)の制御ルーチンを示す。このルーチンにおいてC
PUθυは、先ず、補給期間(1)であるかチェック(
a −1) l、、排出期間(H)である場合にはA/
I)コンバータ(11から最新の重量wを読み込み(a
−2)、次いで(、l: a −2’)で読み込んだ最
新のM jt wと前回に読み込んだ過去の重量W′と
の差分から単位時間当りの第1のスクリューフィーダ(
3)のυト出量を求めて、これを目標流量Fとを比敷し
て、実際の排出盪が目標流量Fに近づくようにモータ(
6)への制御信号を変更(a −8〕シ、〔a−2〕で
読み込んだ最新の重量wが設定値W2 @ W(ならび
に下限設定値wLに一致したかをチェック(a −4’
:l 〔a −5)] (a −6) L/、(a −
4、)〜(a −6)の何れでも一致を検出しない場合
にはその他のルーチンを経て(a −1)に戻る。FIG. 6 shows a control routine for the first screw feeder (3) by the CPU α. In this routine, C
First, check whether PUθυ is in the supply period (1) (
a-1) l,, if the emission period (H), then A/
I) Read the latest weight w from converter (11) (a
-2), then the first screw feeder per unit time (
Determine the ejection amount in 3), compare it with the target flow rate F, and adjust the motor (
6) Change the control signal to (a-8), check whether the latest weight w read in [a-2] matches the set value W2 @ W (and the lower limit set value wL (a-4')
:l [a -5)] (a -6) L/, (a -
If no match is detected in any of steps 4,) to (a-6), the process returns to (a-1) via other routines.
(a−4’:Jで一致を検出すると、その時の(a−8
〕で指示するモータ(6)への制御信号をメモリo埠の
アドレスAにストア(a−7)L、(a−5)または(
8−6)で一致を検出するとその時のそれぞれの制御信
号をメモリθりのアドレスB、CKストア(a −8)
(a −9)する。(a−1)で補給期間(I)であ
ると判定されると、最新の重量Wが設定値w1以下であ
るかをチェック(a−10)し、(a−10,JでW≦
w1 と判定されると期間Jにあるため、メモリ0功の
アドレスCから前記〔a −9) ’T! ス)アされ
た制御信号を読み出1.てモータ(6)ヘモータ制冴装
@(5)を介して出力(a −11)する。(a−10
)でW > W + と判定されると次いで最新のM
ItJ= wが設定値w2以下であるかをチェック(a
−12) t、、(a−12)でW:≦w2と判定さ
れると期間にであるため、メモリ<琲のアドレスBから
前記(a−8)でストアされた制卸信号を読み出し゛C
モータ(6)ヘモータ制御装置(5)を介して出力(a
−18)する。(a−12)でW> w2 と判定さ
れると期間Mであるため、メモリ(2)のアドレスAか
ら前記(、−7)でストアされた制御信号を読み出して
モータ(a>ヘモータ制御装置(5)を介して出力(a
−14)する。(a-4': When a match is detected in J, the (a-8
] Store the control signal to the motor (6) instructed by (a-7)L, (a-5) or (
When a match is detected in 8-6), the respective control signals at that time are stored in memory θ at address B and CK store (a-8).
(a-9) Do. When it is determined in (a-1) that it is the replenishment period (I), it is checked (a-10) whether the latest weight W is less than or equal to the set value w1, and (a-10, J, W≦
If w1 is determined, it is in period J, so from address C of memory 0 success, the above [a −9) 'T! 1. Read out the received control signal. The output (a-11) is output from the motor (6) via the motor controller (5). (a-10
), if W > W + is determined, then the latest M
ItJ = Check whether w is less than the set value w2 (a
-12) If it is determined that W:≦w2 at t, , (a-12), the control signal stored in the above (a-8) is read from the address B of the memory < 琲. Shi゛C
Output (a) to motor (6) via motor control device (5)
-18) Do. When it is determined that W>w2 in (a-12), it is the period M, so the control signal stored in (,-7) is read from the address A of the memory (2) and the motor (a>motor control device (5) Output (a
-14) Do.
このように、補給期間CI)においても重ILwに応じ
てモータ(6)への制御信号を切換えるため、従来に比
べて補給期間CI)における流量変動が改善される。In this way, since the control signal to the motor (6) is switched according to the heavy ILw even during the replenishment period CI), the flow rate fluctuation during the replenishment period CI) is improved compared to the conventional art.
上記実施例では、補給期間(I)の直前の排出期間(H
)においてメモリ0紗にストアした制御信号をそのまま
読み出して補給期間(I)で使用したが、これは過去複
数回の排出期間(H)Icおいて得られた各設定値W+
、W2における制御信号を、それぞれ移動平均処理した
ものを読み出して補給期間(I)で使用することによっ
て、一層の精度向上が期待できる。In the above embodiment, the discharge period (H) immediately before the replenishment period (I)
), the control signal stored in the memory 0g was read out as it was and used in the replenishment period (I), but this was based on each set value W+ obtained during the past multiple discharge periods (H) Ic.
, W2 are subjected to moving average processing and then read out and used in the replenishment period (I), further improvement in accuracy can be expected.
上記実施例では排出期間(H)において設定値w1とw
2および下限設定値W1.の8点について制御信号を記
憶したが、これは複数個の点について制御信号を記憶す
ればよく、記憶する点の数が多いほど精度向上が期待で
きる。In the above embodiment, the set values w1 and w in the discharge period (H)
2 and lower limit set value W1. Although control signals were stored for eight points, it is sufficient to store control signals for a plurality of points, and the accuracy can be expected to improve as the number of points stored increases.
上記実施例の(a −8)では、単位時間当りの重ff
1wの減少重量がその都度目標流量となるように制御す
る瞬間流量制御であったが、これは排出開始からの総排
出量が目標流量の積分値に近づくように制御するように
構成しても同様である。In the above embodiment (a-8), the weight per unit time ff
This was an instantaneous flow rate control in which the weight reduction of 1w was controlled to become the target flow rate each time, but this could be controlled so that the total discharge amount from the start of discharge approaches the integral value of the target flow rate. The same is true.
以上説明のように本発明の制御方法によると、補給期間
においても排出装置の制御信号を計量ホッパー内の被排
出物の重量に応じて前記排出装置の排出能力がほぼ一定
となるように制御できるため、従来に比べて定流量排出
の精度が向上するものである。As explained above, according to the control method of the present invention, the control signal of the discharge device can be controlled so that the discharge capacity of the discharge device is almost constant according to the weight of the material to be discharged in the weighing hopper even during the replenishment period. Therefore, the accuracy of constant flow discharge is improved compared to the conventional method.
第1図はコンスタントフィーノドウェアの構成図、第2
図は従来の制御方法の説明図、第3図〜第6図は本発明
の制御方法の具体的な一実施例を示し、第8図は原料重
量と排出能力との関係図、第4図は制御信号の記憶と読
み出しの説明図、第5図は制御装置本体とその周辺の構
成図、第6図は第5図の要部フローチャート図である1
、(2)・・・・・・・・・計量ホッパー、(3)・・
・・・・・・第1のスクリューフィーダ〔排出装置〕、
(8)・・・・・・・・制御装置本体、θυ・・・・−
・・・CPU、(la・・メ七9、(H)・曲面排出期
間、(I)・・−・・・補給期間
代理人 森本義弘
糞睨品欲囚
+−吐一「轡−≧
4椅−9−一≧
第5図
、、rlZ
第6図Figure 1 is a configuration diagram of the Constant Fino Dware, Figure 2
The figure is an explanatory diagram of the conventional control method, Figures 3 to 6 show a specific embodiment of the control method of the present invention, Figure 8 is a diagram of the relationship between raw material weight and discharge capacity, and Figure 4 1 is an explanatory diagram of storage and reading of control signals, FIG. 5 is a configuration diagram of the main body of the control device and its surroundings, and FIG. 6 is a flowchart diagram of the main part of FIG.
, (2)...Weighing hopper, (3)...
・・・・・・First screw feeder [discharge device],
(8)・・・・・・Control device main body, θυ・・・−
・・・CPU, (la...Me79, (H)・Curved surface discharge period, (I)・・・・Replenishment period agent Yoshihiro Morimoto feces greedy +- Toichi "轡-≧ 4 Chair-9-1 ≧ Figure 5,, rlZ Figure 6
Claims (1)
るまでは前記重量の減少変化に応じて前記計量ホッパー
から定流販排出されるよう排出装置への制御信弓を制御
すると共に、この排出期間中に前記制御信号を前記重量
レベルに対応して複数個以上記憶し、前記重量が下限設
定値に低下した時には上限設定値になるまで計量ホッパ
ーへの罰記被排出物のほぼ定流凰補給を継続し、かつこ
の補給期間には予め記憶させである過去の前記制卸イd
号を計量ホッパー内の被排出物の重量レベルに応じて順
次読み出して前記排出装置に出力するコンスタンニドフ
ィー!ドウエアの制御方法。 2、予め記憶させである過去の制御信号を、過去複数回
の排出期間のそれぞれの重量レベルの制御信号の移動平
均値としたことを特徴とする特許請求の範囲第1項記載
のコンスタントフィー/ドウエアの制御方法。[Scope of Claims] 1. A control signal is sent to the discharge device so that the weight of the discharged material in the needle hopper reaches a lower limit setting value, so that the discharged material is discharged from the weighing hopper at a constant rate according to a decrease in the weight. In addition to controlling the bow, a plurality or more of the control signals are stored in correspondence with the weight level during this ejection period, and when the weight falls to the lower limit set value, a penalty is sent to the weighing hopper until the upper limit set value is reached. Continuing almost constant flow replenishment of the discharged material, and during this replenishment period, the past control inventory d, which has been memorized in advance, is maintained.
The constant feed number is read out sequentially according to the weight level of the discharged material in the weighing hopper and output to the discharge device. How to control doware. 2. The constant fee system according to claim 1, wherein the past control signal stored in advance is a moving average value of control signals for each weight level of a plurality of past discharge periods. How to control doware.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15356382A JPS5943732A (en) | 1982-09-02 | 1982-09-02 | Control method for constant feed ware |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15356382A JPS5943732A (en) | 1982-09-02 | 1982-09-02 | Control method for constant feed ware |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5943732A true JPS5943732A (en) | 1984-03-10 |
JPS6111850B2 JPS6111850B2 (en) | 1986-04-04 |
Family
ID=15565227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15356382A Granted JPS5943732A (en) | 1982-09-02 | 1982-09-02 | Control method for constant feed ware |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5943732A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0322441Y2 (en) * | 1986-12-02 | 1991-05-16 | ||
JP3756552B2 (en) * | 1995-07-28 | 2006-03-15 | 旭化成ケミカルズ株式会社 | Method for producing resin composition |
-
1982
- 1982-09-02 JP JP15356382A patent/JPS5943732A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6111850B2 (en) | 1986-04-04 |
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