JPH07146071A - Cereal moisture detection controller for cereal dryer - Google Patents

Abstract

PURPOSE:To predict crop situation of cereals in response to a weather before start of drying and always suitably dry the cereals by detecting atmospheric temperature and humidity during a set predetermined period, integrating them, and correcting a detected value of the moisture of the cereals based on the integrated value. CONSTITUTION:A cereal dryer ventilates dry hot air from a hot air unit to a lower cereal drying chamber to dry cereals while circulating cereals from an upper cereal drying chamber to the lower chamber. A controller 41 inputs a detection signal from a moisture sensor 2, etc., and inputs detection signals of period setting means 37, an atmospheric temperature sensor 39 and an atmospheric temperature sensor 40 through an integrator 43. In this case, the controller 41 calculates a different value between the integrated values of the atmospheric temperature and humidity detected at the time of starting a drying operation and the set values. A correction value for correcting moisture of the cereals is set based on the calculated different value, and a detection value of the moisture is corrected in response to the correction value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain moisture detection control device for a grain dryer.

[0002]

BACKGROUND OF THE INVENTION Grains stored in a grain storage chamber of a grain dryer are fed from the storage chamber into the grain drying chamber and circulated while flowing down, while a hot air device is provided. The dry hot air generated from the dry air passes through the dry chamber, whereby the grains flowing down in the dry chamber are exposed to the dry hot air and dried.

The moisture content of the grain during hot-air drying is detected by a moisture sensor, and the moisture content variation of the grain is detected from the detected grain moisture content.
When the variation is large, the detected grain moisture is corrected by the correction value that is set and stored so that the moisture becomes large and low. On the contrary, when the variation is small, the detected grain moisture is detected. The moisture content is corrected with a correction value that is small in the setting memory and becomes low, and when these corrected grain moisture values are the same as the set finishing target moisture value, it is determined that the drying of the grain has ended, and the dryer is It is automatically stopped and the drying of the grain is stopped.

When the pattern of rice cultivation is extremely bad due to the influence of cold summer or typhoon like this year (1993), the water content of the grain at the time of staking is larger than the water content variation of the usual year, and The grain size is remarkably different, and more green rice and rice grains are mixed in.Therefore, it is impossible to correct the moisture content of the grain by only moisture variation, and the grain is overdried and the quality deteriorates. I am trying to eliminate this.

[0005]

According to the present invention, the drying hot air from the hot air device 3 is dried while the grains are fed from the grain storage chamber 8 in the upper portion to the grain drying chamber 9 in the lower portion, and are circulated while flowing down. A moisture sensor 2 is provided to ventilate the chamber 9 to dry the moisture, and a moisture sensor 2 for detecting moisture in the grain during circulation drying, a period setting means 37 for setting a predetermined period, an outside air temperature sensor 39 for detecting outside air temperature / humidity, and an outside air. In the grain dryer provided with the humidity sensor 40 and the integrating circuit 43 for integrating the outside air temperature / humidity detected by the outside air temperature / humidity sensors 39 and 40 for a predetermined period, the outside detected at the start of the drying operation The temperature / humidity integrated value is compared with the set predetermined temperature / humidity value to calculate a difference value, and a predetermined correction value is set to correct the grain moisture detected by the moisture sensor 2 based on the calculated difference value. Select and set from the values, and detect The structure of the grain dryer grain moisture detection control apparatus characterized in that a control unit 41 to correct by the predetermined correction value set grain moisture value.

[0006]

The operation and effect of the present invention: The grains stored in the grain storage chamber 8 of the grain dryer are fed from the storage chamber 8 into the grain drying chamber 9 and circulated while flowing down, while the hot air device 3 The hot dry air generated from the dry air passes through the dry chamber 9, so that the grains flowing down the dry chamber 9 are exposed to the dry hot air and dried.

[0007] When the temperature and humidity of the year in which this hot air drying is performed are lower and higher than usual, period setting means 37
When the period until the start of hot air drying is set by operating, the outside air temperature sensor 39 and the outside air humidity sensor 40 detect the outside air temperature and the outside air humidity, and the detected outside air temperature and outside air humidity are set. Is input to the integrating circuit 43 and integrated.

At the time of starting hot air drying, if the accumulated outside air temperature and outside air humidity are equal to or higher than the set and stored outside air temperature and outside air humidity, the accumulated outside air temperature and accumulated outside air humidity are calculated by the following formula, for example: , The judgment value is calculated. (Judgment value = accumulated humidity / accumulated temperature) This judgment value is compared with a predetermined set and stored value to calculate a difference value, and the grain detected by the moisture sensor 2 based on the difference value obtained by this calculation. The correction value to correct the moisture is selected and set from the set and stored correction values, and when the difference value obtained by the calculation is large, the correction value that largely corrects the detected grain moisture to the low moisture side is selected. The moisture content of the detected grain is largely corrected to the low moisture content, and the moisture content of the detected grain is much lower than the moisture content of the detected grain. When the difference value obtained by the calculation is small, the correction value for correcting the detected grain moisture to the low moisture side is selected and set, and the detected grain moisture is corrected to the low moisture side to the low moisture side. The water content is much lower.

The above-corrected grain moisture value is displayed as a detected grain moisture value or used as a dry control grain moisture value. When the corrected grain moisture value becomes equal to the set finishing target moisture value, it is determined that the drying of the grain has ended, the dryer is automatically stopped, and the drying of the grain is stopped.
The outside air temperature and the outside air humidity from a predetermined period before the start of drying are integrated, and the correction value for correcting the grain moisture value detected by the moisture sensor 2 is selected and set based on the integrated outside air temperature and the outside air humidity. By correcting the moisture value of the detected grain with this set predetermined correction value, it means that the weather in the dry year was greatly taken into account. It was possible to prevent the deterioration of grain quality due to overdrying by properly correcting the variation of the grain size.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The illustrated example is a circulation type grain dryer 1 for drying grains.
It shows a state in which a moisture sensor 2 for detecting moisture in the grain, a burner 4 of a hot air device 3 for generating hot air, and the like are attached.

The dryer 1 has a rectangular shape which is long in the front-rear direction and has a transfer gutter 6 and a ceiling plate 7 in which a transfer spiral is rotatably installed in the upper part of the machine wall 5, and below the ceiling plate 7 is a grain. A grain storage chamber 8 for storing grains is formed. Grain drying room 9,
In the lower side of the storage chamber 8, 9 is the exhaust chambers 10 on the left and right sides,
10 is provided between the blower chamber 11 and the central blower chamber 11, and below these drying chambers 9 and 9, a feeding valve 1 for feeding and flowing down the grains is provided.
2 are rotatably supported respectively.

The grain collecting trough 13 rotatably supports a transfer spiral and is provided below the respective drying chambers 9 and 9 to communicate with each other. The hot air device 3 includes a burner 4 and a fuel pump 14 and the like. The burner 4 is installed inside a burner case 15, and the burner case 15 is located on the front side of the front machine wall 5 and on the inlet side of the blower chamber 11. Correspondingly, the operating device 16 is detachably provided on the outer surface of the front machine wall 5, and the dryer 1, the moisture sensor 2 and the burner 4 are put in and started and stopped for each work of drying and discharging. It is provided detachably on the outer surface of the front machine wall 5.

The exhaust fan 17 is provided on a rear side exhaust wall 19, which is provided at a central rear side exhaust duct 19 of the exhaust passage chamber 18 provided so as to communicate with the left and right exhaust chambers 10, 10. An exhaust fan motor 20 that rotationally drives the exhaust fan 17 is provided at 5.
The valve motor 21 rotationally drives the delivery valves 12 and 12 via a speed reduction mechanism.

The fuel pump 14 has a fuel valve and is provided outside the lower plate of the burner case 15. By opening and closing the fuel valve, the fuel pump 14 sucks the fuel in the fuel tank 22, and the burner 4 Is being supplied to. The blower 23 is provided on the outer side of the upper plate, is driven to rotate at a variable speed by a blower motor 24 for shifting, and blows combustion air corresponding to the amount of supplied fuel to the burner 4 by the blower 23. The hot air generated from the burner 4 and the outside air sucked by the air blower 17 and passing through the burner case 15 are mixed to form dry hot air.

The diffusion plate 25 is provided at the center of the bottom plate of the transfer gutter 6 in the front-rear direction and below the supply port for supplying the transfer grains to the storage chamber 8 to uniformly diffuse and reduce the grains to the storage chamber 8. ing.
The grain-raising machine 26 is provided on the outer side of the front side machine wall 5, a belt with a bucket conveyor 27 is stretched inside, and an upper end has a throw-out cylinder 28 between it and the starting end of the transfer gutter 6. The lower end portion is provided with a supply gutter 29 between the lower end portion and the terminal end portion of the grain collecting gutter 13 so as to communicate with each other.

The grain elevator motor 30 is used for the bucket conveyor 2
The belt with 7 and the transfer spiral in the transfer gutter 6 and the transfer spiral in the diffusing plate 25 and the grain collecting gutter 13 are rotationally driven. The moisture sensor 2 is provided substantially in the central portion in the vertical direction of the grain raising machine 26. The moisture sensor 2 is rotated by the moisture motor 31 when an electric measurement signal is transmitted from the operating device 16. The take-up roll 31 ', the detection roll 32', etc. are rotationally driven, and the grain falling during the upper conveyance by the bucket conveyor 27 is received by the take-up roll 31 'and the guide plate 33', and the grain is received. The water is supplied to the detection rolls 32 'and 32', and the water content of the crushed grains is detected while being crushed under pressure between the detection rolls 32 'and 32'.

The operating device 16 has a box shape, and a drier 1, a moisture sensor 2, a burner 4 and the like are placed on the surface plate of the box body, and each start switch 32 is operated to start each drying and discharging operation. , A stop switch 33 for stopping operation, and a moisture setting means 3 for setting a target finishing moisture of grain according to an operation position.
4. Grain type setting means 35 for setting the temperature of the hot air generated from the burner 4 according to the operating position and stake amount setting means 36, measurement period for measuring the outside air temperature and the outside air humidity (15
A period setting means 37 for setting (day to 120 days), a display section 38 for digitally displaying various display items, a monitor display and the like are provided. An outside air temperature sensor 39 and an outside air humidity sensor 40 for detecting the outside air temperature and the outside air humidity are provided outside the lower plate.

The control device 41 is provided in the operating device 16, and is a detection value detected by the moisture sensor 2 and the hot air temperature sensor 42, operation of the switches 32 and 33, and setting means 3.
An integrating circuit 43 for integrating the outside air temperature / humidity detected by the outside air temperature / humidity sensors 39, 40 during the set period set by the operation of the period setting means 37 by inputting the operation of 4, 35, 36, 37 and the like. The CPU 4 and the like which are inputted through the CPU 4 and which perform arithmetic and logical operations and comparison operations on these inputs.
4, the motors 20, 21, 24, 30, 31, the fuel valve, the fuel pump 14, and the like are started, stopped, and adjusted and controlled. Each setting means 34, 35, 36, 37
Is a rotary switch system, and predetermined numerical values and types are set according to the operation position.

The operation of the above embodiment will be described below. When it is determined that the weather is unfavorable compared to the usual year and the pattern of rice cultivation is poor, the period setting means 3 of the operating device 16
Drying is started by operating 7 (step 101), it is detected whether the period setting means 37 is operated (step 102), and if NO is detected, step 1
Return to 02. If YES is detected, the outside air temperature / humidity sensors 39 and 40 detect the outside air temperature / humidity until the drying start switch 32 for starting hot air drying is operated (step 103). The detected outside air temperature and humidity are input to the integrating circuit 43 and integrated (step 104).

The setting means 34, 35 and 36 of the operating device 16 for starting hot air drying are operated to predetermined positions, and the start switch 32 for starting drying is operated (step 10).
5) If NO is detected, the process returns to step 105. YE
When S is detected, each part of the grain dryer 1, the burner 4 of the hot air device 3, the moisture sensor 2, etc. are started (step 10
6) The integrated outside air temperature / humidity is compared and detected whether it is equal to or higher than the stored outside air temperature / humidity (step 107), and the determination value is integrated from the integrated outside air temperature / humidity by the following formula (determination value = Integrated humidity / integrated temperature) (step 108).

Hot air is generated from the burner 4, and the hot air and the outside air that is sucked around the burner 4 by the air exhauster 17 and passes therethrough become dry hot air. This dry hot air is blown from the blower chamber 11. After passing through the grain drying chambers 9 and 9, passing through the air exhaust chambers 10 and 10 and the air exhaust passage chamber 18, the air exhaust device 17
Is sucked in. The grains stored in the grain storage chamber 8 are exposed to the dry hot air and dried while flowing down from the storage chamber 8 into the drying chambers 9 and 9 and fed out by the feeding valves 12 and 12. It flows down and is fed from the grain collecting trough 13 through the supply trough 29 into the grain raising machine 26 by the lower transfer spiral, is transported to the upper portion by the bucket conveyor 27, and is transferred from the throw-out cylinder 28 to the transport trough 6
Is transferred and supplied by the upper transfer spiral onto the diffusion plate 25 through
The diffuser plate 25 uniformly diffuses and reduces it into the storage chamber 8 and circulates it for drying (step 109).

The difference value is calculated by comparing the judgment value calculated in step 108 with a predetermined value which is set and stored (step 110), and a correction value for correcting the grain moisture from the difference value obtained by this calculation. Is selected and set from the set and stored correction values (step 111), and the grain moisture detected by the moisture sensor 2 is corrected by the set correction value. For example, when the detected grain moisture value is 28% and the difference value obtained by the calculation is large, a large correction value (0.5%) is selected and set from the correction values set and stored. The detected grain moisture is corrected to 28% -0.5% = 27.5%. When the difference value obtained by the calculation is small, a small correction value (0.2%) is selected and set from the set and stored correction values, and the detected grain moisture is 28% -0. .2% = 2
It is corrected to 7.8% (step 112).

When the grain moisture value detected by the moisture sensor 2 is corrected and the corrected grain moisture value becomes the same as the finish target moisture set by the operation of the moisture setting means 34,
When the drying is completed, the controller 41 automatically controls the dryer 1 to automatically stop, and the drying of the grain is stopped. (Step 113). 7 to 14 are views showing another embodiment, and FIGS. 9 and 10 are views showing the operating device 45.

The operating device 45 has a box shape, and a display means 46 for displaying various items, for example, in a liquid crystal format on the surface plate of the box body. Below the display means 46, various kinds of dryers 1 are provided. O with multiple push-button methods for setting functions
N-OFF switch function setting means 47a, 47b, 4
7c, 47d and stop means 48 for stopping operation are provided, and various functions set by operating these function setting means 47a, 47b, 47c, 47d are displayed on the display means 46.

The function display of these function setting means 47a, 47b, 47c, 47d before the start of each work of loading, drying and discharging is displayed on the loading, drying, discharging and changing and display means 46 as shown in FIG. ing. Further, these function setting means 47a, 47b for setting the grain type, the drying mode, etc.
The function display of 47c and 47d is displayed on the display means 46 as grain, mode, change and return as shown in FIG.

The control device 49 is provided in the operating device 45,
Detection input of paddy flow sensor (not shown), input of digital information, function setting means 47a, 47b, 47c, 47d
And a digital input circuit (A) 50 for inputting the operation of the stop means 48, input of analog sensor information, and moisture sensor 2
And an analog input circuit 51 to which the detection value detected by the hot air temperature sensor 42 is input, an A / D conversion circuit 52, a serial data receiving circuit 53, a digital input circuit (B) 55 to which the memory clear 54 is input, and these respective inputs. Circuits 50 and 5
Dryer control microcomputer 56 and memory 5 that perform arithmetic logic operations and comparison operations on inputs from 1, 52, 53, 55
7. Start / stop control of the exhaust fan motor 20 via the output circuit (A) 58 according to a command from the dryer control microcomputer 56, and start the valve motor 21 and grain elevator motor 30 via the output circuit (B) 59. And stop control, start, stop and adjustment control of the fuel valve and fuel pump 14 via the output circuit (C) 60, start, stop and adjustment control of the blower motor 24 via the output circuit (D) 61, and output circuit (E) The moisture motor 31 is controlled to start and stop via 62, various items are displayed on the display means 46 via the display circuit 63, and the serial data transmission circuit 64 and the non-volatile memory 65 are provided.

The operation of the other embodiment will be described below. When the moisture content of the grain is measured by the moisture sensor 2, the abnormal processing control when the measurement of the constant grain number (N) is not measured within the constant time (T) is shown in the flowchart of FIG. 11 and FIG.
2 Average detected grain moisture when moisture measurement is not completed (M
The control of the grain shortage abnormal stop time relation of the moisture sensor 2 based on the difference value between S) and the set finish target moisture (ML) is performed as follows.

Drying is started (step 201),
The moisture value of the grain is measured by the moisture sensor 2 (step 20
2) Then, it is detected whether or not the grain moisture measurement is completed (step 203), and if NO is detected, the process returns to step 202.
If YES is detected, it is detected whether or not there is a set of abnormal stop time (step 204), and if NO is detected, a predetermined value is determined according to the difference value between the average detected grain water content (MS) and the set finishing target water content (ML). The abnormal stop time is selected and set (step 205), and the process returns to step 202.

If YES is detected in step 204, it is detected whether a predetermined abnormal stop time has elapsed (step 20
6) If NO is detected, the process returns to step 202. YE
When S is detected, it is abnormally stopped as a drying abnormality, and the drying of the grain is stopped (step 207). By controlling as described above, when measuring the moisture content of the grain, if the measurement of the constant grain number (N) does not end within the constant time (T), the measurement is repeated again, and the measurement ends. If a certain time (T1) elapses without doing so, it will be stopped for a long time due to insufficient number of measured grains, but this constant time (T1) is used as the average detected grain moisture (MS) and the set finishing target moisture (ML). The target finish moisture (M
Even if the measurement is stopped in the vicinity of L) due to the shortage of the number of measured grains, the stop time becomes the minimum stop time, or the stop time is changed depending on the conditions, whereby the overdrying of the grain can be prevented.

Further, when the moisture content of the grain is measured by the moisture sensor 2, the abnormal processing control when the measurement of the constant grain number (N) is not measured within the constant time (T) is performed by the flow chart shown in FIG. 13 and the moisture content shown in FIG. The control of the grain shortage abnormal stop time relation of the moisture sensor 2 by the difference value between the average detected grain moisture (MS) and the set finishing target moisture (ML) when the measurement is not completed and the drying speed set value is as follows. Done.

Drying is started (step 301),
The moisture value of the grain is measured by the moisture sensor 2 (step 30
2) Then, it is detected whether or not the grain moisture measurement is completed (step 303), and if NO is detected, the process returns to step 302.
If YES is detected, it is detected whether there is an abnormal stop time set (step 304), and if NO is detected, the difference value between the average detected grain moisture (MS) and the set finishing target moisture (ML) and the drying speed. A predetermined abnormal stop time is selected and set according to the set value (step 305), and step 30
Return to 2.

If YES is detected in step 304, it is detected whether a predetermined abnormal stop time has elapsed (step 30
6) If NO is detected, the process returns to step 302. YE
If S is detected, it is abnormally stopped as a drying abnormality, and the drying of the grain is stopped (step 307). By controlling as described above, when measuring the moisture content of the grain, if the measurement of the constant grain number (N) does not end within the constant time (T), the measurement is repeated again, and the measurement ends. If a certain time (T1) elapses without doing so, it will be stopped for a long time due to insufficient number of measured grains, but this constant time (T1) is used as the average detected grain moisture (MS) and the set finishing target moisture (ML). By changing the difference value of and the drying speed setting value,
Even if it stops due to insufficient number of measured grains near the target finish moisture (ML), this stop time will be the minimum stop time, or the stop time will be changed depending on the conditions to prevent overdrying of grains. In addition, the accuracy of the finishing target moisture can be improved.

[Brief description of drawings]

 The figure shows an embodiment of the present invention.

FIG. 1 Flow chart

FIG. 2 is a block diagram.

[Fig. 3] Side view of the grain dryer that can be partially broken

FIG. 4 is an enlarged sectional view taken along line AA of FIG.

FIG. 5 is a partially cutaway front view of the operating device.

FIG. 6 is an enlarged perspective view of a part of the moisture sensor.

FIG. 7 is a view showing another embodiment of the present invention, which is a side view of the whole grain dryer in which the grain dryer is partially broken.

FIG. 8 is a block diagram showing another embodiment.

FIG. 9 is a view showing another embodiment, and is an enlarged front view of the operation device in which a part of the operating device can be broken.

FIG. 10 is a view showing another embodiment, which is an enlarged front view of the operation device in which a part of the operating device can be broken.

FIG. 11 is a flow chart showing another embodiment.

FIG. 12 is a view showing another embodiment, which is an operation diagram of a moisture sensor.

FIG. 13 is a flowchart showing another embodiment of the invention.

FIG. 14 is a view showing another embodiment, which is an operation diagram of a moisture sensor.

[Explanation of symbols]

 2 Moisture Sensor 3 Hot Air Device 8 Grain Storage Room 9 Grain Drying Room 37 Period Setting Means 39 Outside Air Temperature Sensor 40 Outside Air Humidity Sensor 41 Controller 43 Integrating Circuit

Claims (1)

[Claims] 1. Drying hot air from the hot air device 3 is blown into the drying chamber 9 to dry it while feeding and circulating the grains from the upper grain storage chamber 8 to the lower grain drying chamber 9. The moisture sensor 2 for detecting the moisture content of the grain during circulation drying, the period setting means 37 for setting a predetermined period, the outside air temperature sensor 39 for detecting the outside air temperature / humidity, and the outside air humidity sensor 40 are provided. In the grain dryer provided with the integrating circuit 43 that integrates the outside air temperature / humidity detected by the air temperature / humidity sensors 39 and 40 for a predetermined period, it is set as the outside air temperature / humidity integrated value detected at the start of the drying operation. A predetermined temperature / humidity value is compared, a difference value is calculated, and a correction value for correcting the grain moisture detected by the moisture sensor 2 based on the calculated difference value is selected from the set predetermined values and set, The predetermined supplement that sets the moisture content of the detected grain A grain moisture detection control device for a grain dryer, comprising a control device 41 for correcting with a positive value.