JPH0517490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a controller for an automatic measuring device that controls an automatic measuring device that measures and mixes powder or liquid.

Automatic weighing equipment automatically measures, blends, and supplies powder, granules, liquid materials, etc., and is an important part of the production line in construction work that handles many types of powder, granules, or liquid materials. occupies a position. By the way, various weighing and discharging methods (operation modes) are set for this automatic weighing device depending on its use and the properties of the material to be measured. Here, one example of the weighing and discharging method will be described below.

Type 1 weighing method: First, multiple material feeders are placed in one automatic weighing device. Then, only a certain material feeding machine starts feeding material into the weighing hopper of the automatic weighing device, and when this feeding amount reaches the set amount, the material in the weighing hopper is discharged, and after the weighing hopper is empty, the next material is fed into the weighing hopper. A method in which the material feeding machine starts feeding materials, and the same operation is performed sequentially thereafter.

Cumulative weighing method: As in the case described above, a plurality of material feeders are arranged in one automatic weighing device.
Then, a certain material input machine is started to input material, and when this input amount reaches a predetermined amount, the material in the weighing hopper is not discharged, and the next material input machine is made to input a predetermined amount of material. Then, the same operation is performed thereafter, and when all the material feeding machines have finished feeding the specified amount of material, the entire amount of material in the weighing hopper is discharged.

Remaining amount control discharge method: If the material has adhesive properties, the material is left in the weighing hopper beforehand, and the amount of adhered material is treated as a tare to control the amount discharged from the weighing hopper.

By the way, the operation of an automatic weighing device is controlled by a controller, so when configuring a weighing system with a desired weighing and discharging method, a dedicated controller that stores the operation of that weighing and discharging method is manufactured, and this controller and In combination with an automatic weighing device, an automatic weighing system according to a desired method is configured. Therefore _, in the weighing system using the conventional controller described above, as shown in _FIG .
The destination of the discharged material from the weighing hopper 1 to be mixed is the tank.
If there are multiple tanks, T ₁ to _{T n ,} and a different metering/discharging method or different material distribution is required for each tank, _the system must be stopped and the controller changed each time the destination tank changes. I had to reconfigure it.

In view of the above-mentioned circumstances, this invention is an automatic weighing device that can control an automatic weighing device by instantly arbitrarily selecting a weighing/distribution method corresponding to a discharge destination without stopping the operation of the automatic weighing device. The controller is provided with a plurality of mode-specific storage areas each storing a control program for a weighing operation mode corresponding to each material discharge destination of an automatic weighing device, and the mode-specific memory area corresponding to the material discharge destination. The area is selected and the automatic weighing device is controlled based on the control program in the selected mode-specific storage area.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. Note that the mechanical configuration of this embodiment is similar to that shown in FIG.

In FIG. 2, reference numeral 10 denotes a control unit composed of a CPU (central processing unit) and various interfaces, etc., which controls the weighing hopper 1 (the first
(Fig.) and the input amount of the material input machines H ₁ to _{H o} are controlled. In this case, although not shown, an output signal (weight signal) from a weight detector such as a load cell that detects the weight of the weighing hopper 1 is supplied to the control section 10, and the control section 10 controls the inside of the weighing hopper 1 based on this weight signal. It is adapted to detect the amount of material input and the amount of material discharged by the weighing hopper. Further, DB ₁ and DB ₂ are output data buses of the control unit 10, and the data bus DB ₁ is connected to the material feeding machine H ₁
A signal to select ~H _o is output and the data bus
A signal for selecting tanks T ₁ to _{T n} is output to DB ₂ . The storage unit 11 consists of storage areas e ₁ to e _n , and these storage areas e ₁ to e _n include a weighing hopper 1.
A metering and discharging method program corresponding to the tanks T ₁ to _{T n} that are the discharge destinations is stored respectively. In each program, each tank T ₁ to _{T n}
The material distribution ratio corresponding to each is set. For example, tank T ₁ requires weighing using the cumulative weighing method using material dosing machines H ₁ to _{H o} ;
T ₂ requires weighing using the same cumulative weighing method as above, but with a different material distribution;
The tank T ₃ needs to be weighed using the type 1 weighing method using the material dosing machines H ₁ to _{H o} .
If T _n requires weighing using the remaining amount control discharge method, storage area e ₁ stores a control program for the cumulative weighing method, and storage area e ₂ stores a control program for each material using the same cumulative weighing method as described above. A control program for a cumulative metering method with different distribution ratios is stored, a control program for a type 1 metering method is stored in storage area _e3 , and a control program for a residual amount control discharge method is stored in storage area _en . has been done. Reference numeral 12 denotes an operation unit consisting of a numeric keypad, switches, etc., which performs writing, rewriting, erasing, etc. of control programs in the storage areas e ₁ to _{e n} , and also corresponds to the discharge destination of the weighing hopper 1 and this discharge destination. Select the storage area you want to save. Note that instead of selecting the storage area using the operation unit 12, a selection signal S ₁ supplied via the external interface 13 is used.
The storage areas e ₁ to e _n may be selected by.

In the configuration described above, when the operator operates the operation unit 12 to select, for example, the tank T ₁ and the storage area e ₁ , the control unit 10 selects the material based on the control program and the output signal of the weight detector described above. The feeding machines H ₁ to _{H o} sequentially feed a predetermined amount of material (a predetermined amount set in the control program) into the weighing hopper 1, and all material feeding machines H ₁ to _{H o} have finished feeding the material. At this point, all the material in the metering hopper 1 is discharged into the tank _T1 . Next, when the operator operates the operation unit 12 to select tank T ₃ and storage area e ₃ while the weighing system is operating, the control unit 10 first operates based on the control program and the output signal of the load cell. , the material feeder _H1 feeds a predetermined amount of material into the weighing hopper 1, and when this feeding is completed, the material in the weighing hopper is discharged into the tank _T3 . When the weighing hopper becomes empty, the material feeder _H2 is caused to feed a predetermined amount of material into the weighing hopper 1, and thereafter all material feeders are made to perform the same operation.

Thereafter, the system can be operated in the metering operation mode corresponding to each tank by selecting any of the tanks T ₁ to _{T n} and the storage areas e ₁ to _{e n} corresponding to the tanks.

Although the above-described embodiment is an example in which powdery material is automatically measured, the present invention can of course also be applied to an automatic metering and supplying apparatus that automatically measures liquid material.

As explained above, according to the present invention, a plurality of mode-specific storage areas are provided for storing control programs for weighing operation modes corresponding to each material discharge destination of an automatic weighing device, and Since the mode storage area is selected and the automatic weighing device is controlled based on the control program in the selected mode storage area, the destination of the material discharged from the weighing hopper changes.
Even if the required weighing/discharging method or material distribution changes, it is possible to instantly switch to the weighing operation mode that corresponds to the discharge destination without stopping the weighing system, increasing system operating efficiency. be able to. Further, there is an advantage that the contents of the mode-specific storage area can be changed regardless of whether the system is in operation or stopped.

[Brief explanation of drawings]

Figure 1 is a schematic configuration diagram showing the configuration of the weighing system when there are multiple material discharge destinations from the weighing hopper;
The figure is a block diagram showing the configuration of an embodiment of the present invention. 10...Control unit, 11...Storage unit, 12...Operation unit, 13...External interface, e ₁ to e _n ...
…Storage area (storage area for each mode), T ₁ to _{T n}
...tank (material discharge destination).

Claims (1)

[Scope of Claims] 1. In an automatic measuring device controller that controls an automatic measuring device that measures, mixes, and discharges materials, a control program for a type 1 weighing method, a cumulative weighing method, and a residual quantity control discharge method is applied to the automatic weighing device. A plurality of mode-specific storage areas are provided for storing data corresponding to different material discharge destinations, and the mode-specific storage area corresponding to the material discharge destination is arbitrarily selected, and the control program in the selected mode-specific storage area is provided. A controller for an automatic weighing device, characterized in that the controller controls the automatic weighing device based on.