JPH0476448A - Moisture detecting and controlling device for grain process plant - Google Patents

Abstract

PURPOSE:To reduce the number of hardware components by selecting detected values from a plurality of moisture meters in a previously set order with the use of a single control device, and by feeding them to processing devices. CONSTITUTION:Moisture meters 24 attached with temperature sensors 28 for rice pearling mills 12, 14, 16, an weighing unit 18 and the like, are connected to the input side of the multiplexer 70 of a control device 26, and an input port 64 is connected to the output side thereof while an output port 66 is connected to a control terminal 70A. Detected moisture values and detected temperature values are delivered to the multiplexer 70, and a control signal is delivered thereto through the port 66 so that the multiplexer 70 selects the detected moisture values and temperature values which have been delivered, in a predetermined order in accordance with the control signal, and delivers them through the port 64 in time series. In this case, the rates of detection of moisture and temperature are slow in comparison with the process speed of the control device 26 which can be therefore used as a single controller common to respective moisture meters 24, thereby it is possible to reduce the number of hardware components.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a grain processing plant in which each device such as a grain dryer, grain miller, huller, etc. is installed in a predetermined section.
The present invention relates to a moisture detection control device for a grain processing plant for detecting moisture in grain in each device.

[Prior art]

Conventionally, each device installed in a grain processing plant has a moisture meter installed, and the detection value detected by this moisture meter is now being taken into the processing equipment installed in each device. ing. For example, in a grain dryer, the moisture value is displayed and the hot air temperature and grain circulation speed are controlled based on the detected moisture value.

Further, in each of the other devices, the drive systems and the like are controlled based on the moisture value taken into the processing device.

[Problem to be solved by the invention]

However, in the above-mentioned conventional device, there is a predetermined interval between the moisture detection timings in each control device, and even though the A/D conversion processing of the processing device is in a standby state outside of this detection timing, the processing Since equipment is required for each device, A/
There is a waste of D converters, etc.

Taking the above facts into consideration, the present invention provides a grain processing plant that can be controlled based on the detection value detected by the moisture meter of each device using a single control device, and can reduce the number of hardware components. The purpose is to obtain a moisture detection and control device for use.

[Means to solve the problem]

The invention according to claim (1) includes a plurality of moisture meters provided in each device for processing grain to detect the moisture content of the grain in each device, and a processing device to process input detection signals. , a selection device to which a plurality of moisture meters are connected, selects detected vibrations outputted from each moisture meter in a predetermined order under control of the processing device, and inputs the selected vibrations to the processing device.

The invention described in claim (2) is characterized in that the processing device determines a moisture meter that outputs a detection signal that is below a predetermined level, and controls the selection device to stop inputting from this moisture meter from the next time. It is characterized by

[Effect]

In the invention described in claim (1), a plurality of moisture meters are sequentially selected by the selection device, and each detected value is supplied to the processing device in chronological order. Therefore, only one processing device is required for a plurality of moisture meters, and the number of hardware components can be reduced.

In the invention described in claim (2), if the detected value by the moisture meter is below a predetermined level, the moisture meter itself is out of order or in an inoperable state, or the device in which this moisture meter is installed is in an untreated state. It is determined that the detected value is the same, and is excluded from selection by the selection device from the next time, and input of detected values to the processing device is discontinued.

As a result, the detection signal input to the processing device is within the range of expected moisture values, reducing error processing when a moisture value below the predetermined level is detected, and smooth control can be performed.

A rice milling plant 10 comprising a rice milling plant 10 is shown. The rice milling plant 10 is composed of three rice milling machines (hereinafter referred to as No. 1 machine 12, No. 2 machine 14, and No. 3 machine I6) and a weighing machine 18 for weighing the rice grains discharged from No. 3 machine 16. . The configuration of the rice milling machine will be described below. Since the first to third rice mills 12, 14, and 16 have the same structure, the explanation will be given using the first mill 12 as an example.

In the main body 20 of the No. 1 machine 12, a grain milling roll (not shown) and a grain polishing cylinder into which the grain milling roll is loosely fitted are arranged in the vertical direction to form a grain milling room.

A pulley is attached to the lower end of the grain milling roll, and the driving force of a motor 22 shown in FIG. 2 is transmitted via a belt. Therefore, the grain milling roll is rotated by the driving force of the motor 22 to mill the rice grains in the grain milling chamber.

Further, a moisture meter 24 is attached to the main body 20.

The moisture meter 24 samples a portion of the rice grains conveyed to the grain milling chamber of the main body 20, crushes the rice grains between a pair of electrode rolls (not shown), and detects the electrical resistance between the electrode rolls via the rice grains. It is supposed to be done. The moisture meter 24 is connected to a control device 26 shown in FIG. 2, and the control device 26 obtains the moisture content of the rice grains based on this detected value. Note that a temperature sensor 28 is attached inside the moisture meter 24, and a signal line of this temperature sensor 28 is also connected to the control device 26.

A hopper 30 is arranged above the main body 20. An opening/closing door (not shown) is provided in the communication path between the hopper 30 and the main body 20, and by opening and closing this opening/closing door with the driving force of the motor 32 shown in FIG. The rice grains stored in the main body 20 are gradually sent to the grain milling room of the main body 20.

One end of the guide tube 36 is connected to the upper end of the elevator 34, and the other end of the guide tube 36 is attached to the upper part of the hopper 30. Elevator 3
4 has a chain wrapped around a pulley at the top and bottom (
(not shown) is provided, and a packet 38 is attached to a part of this chain. One of the pulleys is rotated to the right by the drive of the motor 40 shown in FIG. The rice grains are fed into a hopper 30.

A take-out tube 42 is attached to the lower part of the main body 20 and communicates with the grain milling chamber, so that the milled rice grains can be taken out. The rice grains guided by the take-out cylinder 42 are stored in the packet 38 of the adjacent No. 2 machine 14, and then transferred to the No. 2 machine 1.
4, the grain is further refined. Also,
The rice grains guided by the take-out tube 42 of the No. 2 machine 14 are stored in the packet 38 of the adjacent No. 3 machine 16, and then transferred to the third machine 1.
The grain is further refined by step 6. That is, by applying three rice milling machines and gradually milling the grain, defects such as shell cracking are prevented from occurring.

A weighing machine 18 is arranged downstream of the No. 3 machine 16. This weighing machine 18 also has an elevator 4 similar to the elevator 34.
4 is provided, and the rice grains guided by the take-out tube 42 of the No. 3 machine 1G are transferred to the packet 46 of this elevator 44.
The weighing machine 18 is transported above the weighing machine 18 by the drive of a motor 48 (see FIG. 2). The rice grains transported above the elevator 44 are stored in a hopper 50, and are gradually moved to the weighing machine body 52 by the operation of an opening/closing door (not shown) that is opened and closed by the drive of a motor 51 (see FIG. 2).
After being transported to and weighed, it is taken out from the take-out cylinder 54. The metering data is supplied to a control device 26.

Note that this weighing machine 18 is also provided with a moisture meter 24 connected to a control device 26 to perform a final check of the moisture content of the milled rice grains.

As shown in FIG. 2, the control device 26 includes a microcomputer 56 as a processing device. The microcomputer 56 includes a CPU 58 and a RAM 6.
0. It is composed of a ROM 62, an input port 4, an output port 6, and a bus 68 such as a data bus or a control bus that connects these. The output port 6 includes the motors 22, 32, 40 of each of the rice milling machines and the motor 4 of the weighing machine.
8.52 signal lines are connected.

The input port 4 is configured to receive weighing data from a weighing machine 18. The input port 4 is also connected to the output side of a multiplexer 70 as a selection device.

On the input side of the multiplexer 70, each 112.14.1
6 and the moisture meter 24 of the weighing machine 18 are connected, and the moisture detection value and temperature detection value of each are inputted. The multiplexer 70 also has a signal line 72 from the output port 6 at its control signal input terminal 70A.
is connected, and a control signal for controlling the timing of the signal output from the multiplexer 70 to the input port 4 is input. That is, the detection signal input from the signal line connected to the input side is output from the output side in time series based on the control signal.

The operation of this embodiment will be explained below.

The rice grains dried by the dryer are stored in a packet 38 of the No. 1 machine 12, and are transported above the elevator 34 by the driving force of the motor 40. The rice grains conveyed above the elevator 34 are stored in the hopper 30 through the guide tube 36 in packets 38 . Here, when the opening/closing door is opened by the driving force of the motor 32, the rice grains stored in the hopper 30 flow down into the grain milling chamber of the main body 20, and are rotated by the rotation of the grain milling roll driven by the driving force of the motor 22. The grain is milled with relatively low white skin.

The polished rice grains are transferred to the No. 2 machine 14 by a take-out cylinder 42.
is accommodated in the packet 38. In Unit 2 I4, the above 1
As in the No. 3 machine, by driving the grain milling rolls, the grain is polished with a white skin slightly higher than the white skin, and is transported to the No. 3 machine 16. In the No. 3 machine 16, the grain is polished to become the final white bark, transported from the take-out tube 42 to the weighing machine 18, weighed by the weighing machine 18, and then taken out.

Here, each machine 12.14, I6, and weighing machine I8 detect the moisture content of the rice grains being processed. The appropriate moisture value for each machine is approximately 13% for Unit 1 12 and 14.3 for Unit 2.
For example, if there is a large error between the appropriate moisture value and the detected moisture value in the first machine 12, the control device 26 will stop the milling of the second machine 14, the third machine 16, and the unit Overdrying is corrected by increasing or decreasing the amount of grain polished per hour or by using a humidifier. For this reason,
It is possible to prevent defects such as shell cracking that occur during rice milling. Furthermore, since the moisture meter 24 of the weighing machine 18 checks the moisture value of the finished rice grains, it is possible to monitor variations in the finish of the polished rice.

Note that each moisture meter 24 is also equipped with a temperature sensor 28, so that the temperature of the rice grains can be detected at the same time as the moisture value, and can be applied as a control parameter.

The multiplexer 70 of the control device 26 supplies the moisture detection values and temperature detection values from the plurality of moisture meters 24 to the input port 4 in time series based on the control signal from the output port 6. That is, since the timing of moisture detection and temperature detection is slower than the processing speed of the control device 26, the control device 26 is used as a common controller for the moisture meters 24 of each machine 12, 14, 16 and the weighing machine 18. Therefore, even if there are a plurality of devices applied to the rice milling plant 10, only a single control device 26 is required, and it is possible to reduce the number of hardware components of the control system.

Next, in the control device of this embodiment, the detected moisture value and the detected temperature value detected from each moisture meter 24 are compared with a level (low level) stored in advance in the RAM 60 to determine whether the detected values are appropriate. I am deciding whether or not to do so. The control will be explained below according to the flowchart of FIG.

First, in step 100, the flag F for the first unit 12 is
, reset flag G for No. 2 machine 14, flag H for No. 3 machine 16, and flag J for weighing machine 18) (0) t,,
Next, in step 102, a control signal for activating the multiplexer 70 is output, and the first unit 12 is placed in the detection mode.
Proceeding to step 104, it is determined whether flag F has been reset. If an affirmative determination is made in step 104, the process proceeds to step 106, where the moisture value W15 of the first machine 12 is detected, and then, in step 108, the temperature TIs of the first machine is detected. In the next step 110, RAM6
The levels Wt and TL stored in advance as 0 are read out, and the process proceeds to step 112, where they are compared. As a result of the comparison in step 112, W+s≦W and TIS
If it is determined that ≦TL, flag F is set in step 114, and then the process moves to step 116. Also,
If it is determined in step 112 that W, s>WL and TIS>TL, it is determined that the lq machine I2 is in use, and the process skips step 114 and proceeds to step 1.16.

Note that if it is determined in step 104 that flag F is set (1), steps 106 to 11 are performed.
4 and moves to step 114.

In step 116, a control signal for operating the multiplexer 70 is output, the second machine 14 is placed in the detection mode, and the process proceeds to step 118, where it is determined whether the flag G has been reset.

If an affirmative determination is made in step 118, step 12
0, the moisture value W2S of the second machine 14 is detected, and then, in step 122, the temperature T2S of the second machine is detected. In the next step 124, the levels WL and Tt stored in advance in the RAM 60 are read out, and the process proceeds to step 126, where they are compared. As a result of the comparison in step 126, if it is determined that W2g≦W+ and T2S≦TL, a flag G is set in step 128, and then the process moves to step 130. Also, in step 12G, W+
If it is determined that s>WL and 'rls>T'L,
It is determined that the second unit 14 is in use, and step 12
8 and proceeds to step 130.

Note that if it is determined in step 118 that the flag G is set (1), steps 120 to 12 are performed.
8 and moves to step 13o.

In step 130, a control signal for operating the multiplexer 70 is output, the third machine 16 is placed in the detection mode, and the process proceeds to step 132, where it is determined whether the flag H has been reset.

If the determination in step 132 is affirmative, step 13
4 and the moisture value of Unit 3 16 W3. is detected, and then, in step 136, the temperature T3S of the No. 3 machine is detected. In the next step 138, the levels w, . As a result of the comparison in step 140, if it is determined that W35≦WL and T3s≦T, the flag H is set in step 142, and then the process proceeds to step 144. Also, in step 140, W35>W
If it is determined that L and T3S>TL, it is determined that the third machine 16 is not in use, and the process skips step 142 and proceeds to step 144.

Note that if it is determined in step 132 that the flag H is set (1), steps 134 to 14 are performed.
2 and proceeds to step 144.

In step 144, a control signal for operating the multiplexer 70 is output, the weighing machine 18 is placed in the detection mode, and the process proceeds to step 146, where it is determined whether flag j has been reset.

If an affirmative determination is made in step 146, step 14
8, the moisture values W and ls of the weighing machine 18 are detected, and then, at step 150, the temperature Tl4s of the weighing machine 18 is detected. In the next step 152, the levels Wt and TL stored in advance in the RAM 60 are read out, and the process proceeds to step 154, where they are compared. As a result of the comparison in step 154, if it is determined that W, ls≦WI and Txs≦Tt, the flag J is set in step 156, and then the process moves to step 102. Also, step 1
54 and W X 5 >'JJ L and TMS > TL
If it is determined that the weighing machine 18 is being used, the process skips step 156 and proceeds to step 102.

Note that if it is determined in step 146 that the flag J is set (1), steps 148 to 15 are performed.
6 and moves to step 102.

By repeating the above control, when a flag is set, it is possible to pass the control routine that detects moisture and temperature from the rice milling machine corresponding to that flag, and handles errors when the detected value is outside the expected range. etc. will no longer be necessary.

Note that in this embodiment, a multiplexer 70 is used as a selection device.
was applied, but output may be output in chronological order using multiple relays.

Further, in this embodiment, the rice milling plant 10 is used as a grain refining plant, but the present invention can also be applied to a plant with a dryer or the like. It can also be applied to a plant that includes a dryer, a rice mill, etc.

3 is a flowchart showing a detection control routine.

10...Rice milling plant, 24...moisture meter, 26...control device, 28...Temperature sensor, 70... multiplexer, 72...Signal line.

Claims (2)

[Claims] (1) Multiple moisture meters installed in each grain processing device to detect the moisture content of the grain in each device, a processing device that processes input detection signals, and multiple moisture meters are connected. A moisture detection control device for a grain processing plant, comprising: a selection device that selects detected vibrations output from each moisture meter in a predetermined order under control of the processing device and inputs the selected vibrations to the processing device. (2) The processing device determines the moisture meter that outputs a detection signal that is below a predetermined level, and controls the selection device to stop inputting from this moisture meter from the next time onwards. (1) The moisture detection control device for a grain processing plant.