JPS6342731A - Treatment for raw material based-on load deviation and controlling method - Google Patents

Abstract

PURPOSE:To enhance the precision of various treatments and the control of raw material by receiving a load signal fed from a load cell according to the weight of the raw material and calculating the load deviation per unit time and performing the treatment and control for the raw material based thereon. CONSTITUTION:Both the indication of the amount of a raw material to be instantaneously disbursed and the indication of the amount to be grabbed by a bucket are enabled based on Q1 obtained in a step 110 and Q4 obtained in a step 117. The integrating amount of the raw material to be disbursed can be calculated based on Q5 obtained in a step 118 and alarm can be given based on these various data. Furthermore in case the amount Q1 of the raw material to be instantaneously disbursed, the amount Q4 to be grabbed by the bucket and the integrating amount Q5 of the raw material to be disbursed are calculated, feedback can be applied to a feed side and a disbursement side of the raw material by using the detection signals and the control or the like of the amount to be grabbed by the bucket is enabled by means of the command sent from the ground.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a raw material processing and management method based on load deviation in various equipment equipped with a load cell that sends out a load signal according to the weight of the raw material. It is.

[Conventional technology]

Various types of equipment such as hoppers that store and discharge raw materials generally have a load cell attached to their lower end that sends an analog load signal according to the weight of the raw material.Based on the load signal sent by this load cell, the hopper is Instructing and recording the load of stored raw materials, controlling the discharge of raw materials by placing them in high, medium and low positions by comparison with set values, starting and stopping the supply, issuing alarms based on predetermined values, and various other processes. Management is in place.

FIG. 4 is a block diagram showing various processing and management methods for raw materials using load cells in conventional hopper equipment. In the figure, 1 is a hopper, 2 is a raw material that is supplied to the hopper 1 by opening a bucket (not shown), 3 is an electric feeder that discharges the raw material 2 discharged from the hopper 1, and 4 is an electric feeder that is fed to the hopper 1. This is a load cell that sends out an analog load signal according to the weight of stored raw materials.The load signal sent out by the load cell 4 is amplified by a load cell amplifier 5, and an instantaneous load is displayed on the load indicator 6 based on this amplified load signal. Also, this load signal is compared with a predetermined reference value in a set value comparison device 7, and based on the comparison result, the start/stop of dispensing and supplying of raw materials is controlled via a control device 8. Processing and management such as control, issuance of warnings based on predetermined prices, etc. are performed.

[Problem that the invention seeks to solve]

However, in the conventional methods of processing and managing raw materials in hopper equipment using load cells, there is no means to measure the instantaneous amount of raw materials discharged, and the method of measuring the amount of raw materials grabbed by a bucket does not allow This is due to the winding current, making it difficult to improve the precision of various treatments and management.

[Means for solving problems]

The present invention was made in view of these problems, and it receives a load signal from a load cell according to the weight of the raw material, samples the load deviation per unit time, and processes and processes the raw material based on this load deviation. It is designed to be managed.

[Effect]

Therefore, according to the present invention, raw materials can be processed and managed with high precision based on load deviation.

〔Example〕

Hereinafter, a method for processing and managing raw materials based on load deviation according to the present invention will be explained in detail. FIG. 2 is a characteristic diagram showing changes in the load of the raw material in the hopper 1 based on the analog load signal obtained via the load cell 4 in FIG. That is, the vertical axis represents load W (ton), and the horizontal axis represents time t.
(sec), raw materials stored in the bucket are supplied to hopper 1 at intervals of period T, and hopper l
This shows a state in which the raw material 2 is being dispensed at a predetermined speed. That is, at time t1, the bucket opens and new raw materials are introduced into the hopper 1. At this time, since an impact force is applied to the hopper 1, the detected load W
momentarily becomes larger than the actual load.

Here, the time period during which impact load is applied when raw materials are introduced is T2.
Then, the instantaneous amount of raw material discharged from hopper 1 Q,
is (W, -W 3) / T 3 (ton/5
ec). Here, T is an arbitrarily determined sampling time, and the instantaneous payout amount Q is obtained at every sampling time T3 that is repeated until the next bucket is opened, and the sum Q2-ΣQ of this instantaneous payout amount Q1 is sampled. By dividing by the number of times H, the average payout amount Q can be obtained. On the other hand, the amount of raw materials input per time using a bucket (bucket gripping amount > Q4 is Wl−(W4+
Q3・T2). Therefore, the cumulative amount of raw materials paid out Q.

is obtained by ΣQ4.

FIG. 1 is a flowchart when the above-described calculation is performed using a microcomputer or the like.

That is, this program is started in step 101, and data is initialized in step 102. In other words, the total sum Q2 of the sampling number H1 and the instantaneous payout amount Q1
, the cumulative amount Q of raw materials to be paid out, are each set to zero. Then, in step 103, it is confirmed that the bucket is opened, and a timer is activated (step 104), and after Tzsec, the load data W is read (step 105).

Then, this read load data Wl is stored and stored in W2 (step 106), and steps 108 to 113 are repeated until the next time the bucket is opened and re-injection of raw materials is confirmed (step 107). That is, a timer is driven in step 108, and after sampling time T and SeC have elapsed, load data W3 is read (step 109).

Then, in step 110, (W2-W3)/T
, to calculate the instantaneous payout amount Q, and add this Ql to Q2 to obtain a new Q2 (step 111), and store the loaded load data W3 in W2 again.Step 1
12) and add 1 to the sampling number 11 to obtain (
Step 113) Return to step 107.

When it is confirmed in step 107 that the bucket is open, T2s e
At the same time as the timer c is started, the load data W4 at that time is read (step 115). and,
In step 116, the sum Q2 of the instantaneous payout amount Q obtained in step 111 is calculated in step 113.
The average payout amount Q3 is obtained by dividing by the number of sampling times H counted sequentially (step 116). Also, use this average payout amount Q3 to calculate Q3・T2, and use load data W4 and load data W1 to calculate Wl (W4
+Q3・T2) and obtain the bucket gripping amount Q4 (
Step 117). Furthermore, this bucket gripping amount Q4
is added to Q to obtain the cumulative amount of raw materials to be paid out, Q.

(step 118), and set the sum Q2 of the sampling number H and the instantaneous payout amount Q1 to zero (step 119),
At the end of the time measurement of Tzsec in step 114, the process returns to step 105.

By using such a program, step 11
Based on the QI obtained in step 0 and Q4 obtained in step 117, it is possible to display the instantaneous amount of raw materials dispensed and the amount of the bucket to be grasped, and also to display the cumulative amount of raw materials dispensed based on the Q obtained in step 118. It is also possible to issue warnings based on these various data. Furthermore, if the instantaneous amount of raw materials to be dispensed Q1, the amount of buckets to be grabbed, and the cumulative amount of raw materials to be dispensed, Q, can be determined, the detection signals can be used to feed-hack the raw material supply side and the raw material discharge side. Based on commands from the hopper, the amount of the bucket to be picked up can be controlled, and the amount of output from the hopper can be controlled. Further, when loading raw materials onto a truck, the loading amount may vary depending on the size of the truck, and in such a case, it is possible to dispense a fixed amount according to a set value using feed hacking. Furthermore, when raw materials are supplied to the hopper from a conveyor via a chute, it is possible to control the receiving side based on the instantaneous supply amount in order to eliminate clogging of the chute.

In this embodiment, the operation of the flowchart shown in FIG. 1 is achieved using a microcomputer or the like, but it may also be constructed using a hardware circuit as shown in FIG. 3. That is, in the deviation calculation device 9 controlled using the calculation control bag W11, the load deviation (WI
(corresponding to step 110 and step 111), and use the data calculation device 10 to obtain the instantaneous dispensing amount Q+, average dispensing amount Q3, bucket grasping amount Q4, and cumulative dispensing amount Q of raw materials (step 110,
Step 116, Step 117 and Step 118
), these various data are displayed on the displays 12.13 and 14, and a deviation feedback signal is obtained from the terminal 10.1. Furthermore, the arithmetic control device 1
1 supplies various control signals to the control device 8 based on various signals obtained via the data calculation device 10.

〔Effect of the invention〕

As explained above, according to the raw material processing and management method based on the load deviation according to the present invention, the load signal corresponding to the weight of the raw material from the load cell is received, the load deviation per unit time is sampled, and the load deviation is sampled based on this load deviation. Since the raw materials are processed and managed using the same method, functions that have not been added in the past can be added to the processing and management, making it possible to control and manage with higher precision.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing an embodiment of the raw material processing and management method based on load deviation according to the present invention, and FIG. 2 shows changes in the load of the raw material in the hopper based on an analog load signal obtained via a load cell. Characteristic diagram, FIG. 3 is a block configuration diagram when the operation of the flow chart shown in FIG. 1 is configured by a hardware circuit, and FIG. 4 is a block configuration diagram explaining various processing and management methods in conventional hopper equipment . DESCRIPTION OF SYMBOLS 1... Hopper, 2... Raw material, 4... Load cell, 9... Deviation calculation device, 10... Data calculation device,
11... Arithmetic control device.

Claims (1)

[Claims] Based on load deviation, characterized in that the load signal corresponding to the weight of the raw material is received from a load cell, the load deviation per unit time is sampled, and the raw material is processed and managed based on this load deviation. Raw material processing and management methods.