KR102667621B1 - Moisture measuring device - Google Patents

Abstract

Provides a moisture measuring device that can more accurately measure the moisture content of grains. The moisture measuring device 10, which measures the moisture content of grains, is provided on a substrate 31g that controls the moisture measuring device 10, and includes a temperature sensor 31h that measures the temperature within the moisture measuring device 10, and a grain It is provided with a temperature sensor 44 that measures the temperature of the space through which it passes, and a measuring unit 31f that measures the moisture content of some grains of grain that passed through this space. The measurement part 31f corrects the moisture content of the measured grain based on the temperature measured by the temperature sensor 31h and the temperature measured by the temperature sensor 44.

Description

Moisture measuring device

The present invention relates to a moisture measuring device for measuring the moisture content of grain.

Conventionally, as a moisture measuring device of this type, it is known that, for example, it is provided in a grain dryer for drying grain, and measures the moisture content of a portion of the received grain as the moisture content of the grain in order to check the degree of drying of the grain. (For example, see Patent Document 1).

The moisture measuring device includes a moisture measuring device that includes a pair of rollers and a measuring unit that measures the electrical resistance between the paired rollers. The moisture measuring device electrically measures the amount of moisture contained in the crushed grain by crushing the grain between the outer peripheral surfaces of a pair of rollers and measuring the electrical resistance value between the pair of rollers using a measuring unit. I'm doing it.

[Patent Document 1] Japanese Patent No. 6127584

However, the measured electrical resistance value changes depending on the temperature of the grain. Therefore, the moisture measuring device cannot accurately measure the moisture content of grains simply by measuring the electrical resistance value when some grains are crushed. Accordingly, the moisture measuring device uses the temperature measured by a temperature sensor provided on the substrate of the main body as the temperature of the grain, and corrects the moisture content of the grain based on the temperature.

Specifically, in a moisture measuring device in which a measuring unit for measuring the moisture content of grain and a temperature sensor are provided on a substrate, when data of the temperature inside the moisture measuring device is supplied from the temperature sensor to the measuring unit, the measuring unit uses the following (Equation 1) ) to correct the moisture content of the grains.

Moisture content of grain after correction = Moisture content of grain before correction + A ‥ (Equation 1)

A: Correction value based on the temperature inside the moisture measuring device measured by the temperature sensor on the board

However, if there is a difference between the temperature measured by the temperature sensor on the board of the moisture measuring device and the actual temperature of the grain, the moisture measuring device cannot correct the moisture content of the grain, resulting in a more accurate moisture content of the grain. cannot be measured.

In order to solve the above-described problem, the present invention is a moisture measuring device that measures the moisture content of grains, and is provided on a substrate that controls the moisture measuring device, including a first temperature sensor that measures the temperature within the moisture measuring device and the grain passing through. It is provided with a second temperature sensor that measures the temperature of the space in which the moisture is measured, and a moisture measuring unit that measures the moisture content of some grains of grain that have passed through this space, and the moisture measuring unit measures the temperature measured by the first temperature sensor and the second temperature sensor. It is characterized by correcting the moisture content of the measured grain based on the temperature measured by the temperature sensor.

According to the moisture measuring device of the present invention, the moisture content of the grain is based on the temperature measured by the first temperature sensor provided on the substrate and the temperature measured by the second temperature sensor that measures the temperature of the space through which the grain is passing. By correcting, it is possible to measure the moisture content of grains more accurately.

1 is a schematic configuration diagram of a grain dryer showing one embodiment of the present invention.
Figure 2 is an overall perspective view of the moisture measuring device.
Figure 3 is a side cross-sectional view of the moisture measuring device.
Figure 4 is a front cross-sectional view of the moisture measuring device.
Figure 5 is a diagram for explaining the moisture measuring unit.

1 to 5 show one embodiment of the present invention.

The moisture measuring device 10 of the present invention is provided in the grain dryer 1 as shown in FIG. 1. The grain dryer (1) includes a storage part (2) for storing grain, a drying part (3) for drying the grain, and a collecting part (4) for collecting grains coming down from the drying part (3). ), a grain collecting unit (5) for returning the grain collected in the collecting unit (4) to the storage unit (2), and a grain bin ( It is equipped with a floating grain control (7).

The storage unit 2 is located on the upper side of the grain dryer 1 and accommodates grains.

The drying unit 3 is provided below the storage unit 2, and heats the grains coming down from the storage unit 2 in a circular motion using, for example, far-infrared rays or hot air, thereby reducing the moisture contained in the grains.

The collecting section 4 is provided below the drying section 3 and collects grains coming down from the drying section 3 through a circulation operation.

The grain collecting section 5 is provided to extend the side surfaces of the storage section 2, the drying section 3, and the collecting section 4 in the vertical direction, and conveys and stores the grain collected in the collecting section 4 upward. It is discharged to the top of part (2). In addition, an inlet 6 is provided at the lower part of the grain unit 5 for inputting grain to be dried by the grain dryer 1. Grain introduced from the inlet 6 is conveyed upward by the grain raising section 5 and discharged to the upper part of the storage section 2. Furthermore, a discharge portion is provided at the upper part of the grain portion 5 to discharge grains accommodated in the inner space.

As shown in FIG. 1, the valley tube 7 is provided at a position adjacent to the right end of the valley part 4. The grain bin 7 forms a delivery path for sending grain from the collecting section 4 to the grain raising section 5. The collecting unit 4 has a conveying mechanism 401 that conveys the grains coming down to the grain bin 7. The conveyance mechanism 401 has a tooth that protrudes spirally with respect to the rotation axis, and by rotation of the tooth, the falling grain is conveyed from left to right in FIG. 1. In this way, the grain is conveyed from the grain collecting section 4 to the grain container 7 and is sent from the grain container 7 to the grain container 5.

The grain dryer 1 configured in this way is designed to circulate grain in the order of the storage unit 2, the drying unit 3, the collecting unit 4, the grain bin 7, and the grain loading unit 5.

The moisture measuring device 10 of the present invention is installed on the lower side of the side of the raised section 5 extending in the vertical direction, that is, on the lower side of one side of the grain dryer 1. The moisture measuring device 10 measures the amount of moisture contained in some grains of the grain conveyed upward from the grain grain unit 5, as the moisture content of the grain, every predetermined time.

In addition, in this embodiment, the 'moisture content' refers to 'the weight of moisture', 'capacity of moisture', 'moisture weight ratio' which is the ratio of the weight of moisture in the grain to the weight of the entire grain, and the capacity of the entire grain. It may mean any of the 'moisture capacity ratio', which is the ratio of the moisture capacity of the grain.

The grain dryer (1) detects that the moisture content of the grain measured by the moisture measuring device (10) has reached a preset moisture amount during the drying operation of the grain, and operates the drying unit (3), the gathering unit (4), and the grain raising unit. It is possible to stop the operation of (5).

As shown in FIGS. 2 to 4, the moisture measuring device 10 is provided with a housing 20 formed to protrude from the side of the curved portion 5 and within the housing 20 to measure the amount of moisture contained in the grain. It is provided with a moisture measuring device 30 for the moisture measurement device 30 and a grain supply device 40 for supplying grains toward the moisture measuring device 30.

The housing 20 has a box shape extending in the vertical direction as shown in FIG. 2. As shown in FIG. 3, the housing 20 is installed on the side wall of the curved portion 5 with the first side 21 facing the curved portion 5. The bottom surface 22 of the housing 20 slopes downward from the second side 23 opposite the first side 21 toward the first side 21 . An observation window 24a is provided on the third side 24 adjacent to the first side 21 of the housing 20 to enable viewing of the inside of the housing 20 from the outside.

As shown in FIG. 4, the interior of the housing 20 has a first space 20a on the third side 24 side and a fourth side opposite the third side 24 by a partition wall 26. It is divided into a second space 20b on the (25) side. An intake port 21a for collecting grains is provided in the upper part of the first side 21 of the housing 20 on the side of the first space 20a. In addition, as shown in FIG. 4, at the lower part of the first space 20a on the first side 21 of the housing 20, there is an outlet for discharging grains whose moisture content is measured by the moisture measuring device 30. (21b) is provided.

As shown in FIGS. 3 and 4, the moisture measuring device 30 is provided for each grain size to measure the moisture content, and includes a plurality of moisture measuring units 31 for crushing the grains, and a plurality of moisture measuring units 31 ) and a driving force transmission mechanism 33 for transmitting the driving force of the electric motor 32 to the plurality of moisture measuring units 31.

The plurality of moisture measuring units 31 include a first rotation shaft 31a and a second rotation shaft 31b that are driven by receiving the driving force of the electric motor 32, and a first roller 31c supported on the first rotation shaft 31a. and the second roller 31d and the third roller 31e supported on the second rotation shaft 31b, between the first roller 31c and the second roller 31d, or between the first roller 31c and the third roller 31e. It has a measuring part 31f that measures the electric resistance value between the three rollers 31e.

As shown in FIGS. 4 and 5, a substrate 31g for controlling the moisture measuring device 10 is provided inside the housing 20. The substrate 31g is supported on the support members 34a and 34b by being fixed to the support members 34a and 34b that protrude in the vertical direction from the first side 21 of the housing 20 with a fixing member such as a bolt. It is written as . A measuring portion 31f is provided on the substrate 31g. Additionally, a temperature sensor 31h capable of measuring the temperature inside the moisture measuring device 10 is provided on the substrate 31g. The temperature sensor 31h is made up of a diode, for example.

The first rotation axis 31a and the second rotation axis 31b are each made of metal, and as shown in FIGS. 4 and 5, the central axes are arranged so that the central axes are parallel to each other in the horizontal direction in the first space 20a. It is done. One end of the first rotation shaft 31a and the second rotation shaft 31b is rotatably supported on the partition wall 26.

The first roller 31c is a metal cylindrical member fixed to the outer periphery of the first rotating shaft 31a. Roll-type roller processing, such as a cross pattern, is performed on the outer peripheral part of the first roller 31c. Additionally, a rotating brush 31c1 and a scraper 31c2 are provided in the vicinity of the first roller 31c to remove grain fragments adhering to the outer peripheral surface of the first roller 31c.

The second roller 31d is a metal cylindrical member fixed to the outer periphery of the second rotating shaft 31b. The axial dimension of the second roller 31d is approximately half that of the first roller 31c. As shown in FIGS. 4 and 5, a groove 31d1 is formed on the outer peripheral portion of the second roller 31d by roll roll processing, for example, in a spiral pattern or a straight pattern. The groove 31d1 is formed between the outer periphery of the first roller 31c and the outer periphery of the second roller 31d to a depth that allows crushing of small grains such as rice or wheat.

The third roller 31e is a metal cylindrical member fixed to the outer periphery of the second rotating shaft 31b. The axial dimension of the third roller 31e is approximately half the axial dimension of the first roller 31c, and is approximately the same as the axial dimension of the second roller 31d. As shown in FIG. 5, a groove 31e1 is formed on the outer periphery of the third roller 31e by, for example, cutting type rollet processing such as a spiral pattern or a straight pattern. The groove 31e1 is larger than the groove 31d1 of the second roller 31d, which allows crushing of large grains such as soybeans and corn between the outer peripheral portion of the first roller 31c and the outer peripheral portion of the third roller 31e. It is formed with a large depth dimension.

As shown in FIG. 5, the second roller 31d and the third roller 31e are aligned in the axial direction of the second rotation shaft 31b. In this embodiment, the plurality of moisture measuring units 31 are formed between the outer periphery of the first roller 31c and the outer periphery of the second roller 31d as the first moisture measuring unit 31A, and the first roller 31c ) and the outer periphery of the third roller 31e are used as the second moisture measuring portion 31B.

In addition, in the vicinity of the second roller 31d and the third roller 31e, as shown in FIG. 3, there is a space for removing grain fragments attached to the outer peripheral surfaces of the second roller 31d and the third roller 31e. A fixed brush (31d2) and a scraper (31d3) are provided.

Furthermore, each of the plurality of moisture measuring units 31 has a foreign matter removal structure for removing foreign substances such as stones or metal pieces different from grains when supplied. The foreign matter removal structure is a portion of the outer periphery of the first roller 31c, a portion of the outer periphery of the second roller 31d and the third roller 31e, or the first roller 31c, the second roller 31d and the third roller 31e. It is formed by performing so-called D cut processing in which a part of the outer peripheral part of the roller 31e is cut to be flat.

In the plurality of moisture measuring units 31, when foreign matter is supplied while the first rotating shaft 31a and the second rotating shaft 31b are being driven to measure the moisture content of the grain, the foreign matter is supplied to the rollers 31c, 31d, and 31e. By interfering with each other, the rotation of the first rotation shaft 31a and the second rotation shaft 31b is regulated. The plurality of moisture measurement units 31 detect a state in which the rotation of the first and second rotation shafts 31a and 31b is regulated, and the first and second rotation shafts 31a and 31b are used when measuring the moisture content. ) The first rotation shaft (31a) and the second rotation shaft (31b) are rotated in the direction opposite to the rotation direction. As a result, foreign substances introduced into the moisture measuring unit 31 are inserted into the gap formed by the D cut between the first roller 31c and the second roller 31d, or between the first roller 31c and the third roller 31e. It is removed from the moisture measuring unit 31 by dropping it.

As shown in FIG. 5, the measuring unit 31f measures the electrical resistance value between the first measuring point 31f1 connected to the first rotating shaft 31a and the second measuring point 31f2 connected to the second rotating shaft 31b. Measure. The measuring part 31f is located between the first roller 31c and the second roller 31d, or between the first roller 31c and the third roller 31e, with the first measuring point 31f1 An electric circuit is formed between the second measurement points 31f2. The measuring unit 31f measures the amount of moisture contained in the grain by detecting the electrical resistance value between the first measuring point 31f1 and the second measuring point 31f2. Additionally, the measuring unit 31f corrects the moisture content contained in the measured grains by the method described later.

As shown in FIGS. 3 and 4, the electric motor 32 is provided in the upper part of the first space 20a and is fixed to the partition wall 26.

As shown in FIG. 4, the rotation shaft of the electric motor 32 is connected to the driving force transmission mechanism 33. Additionally, a first rotation shaft 31a and a second rotation shaft 31b are connected to the driving force transmission mechanism 33. The driving force transmission mechanism 33 is provided in the second space 20b and is fixed to the partition wall 26.

As shown in FIG. 3, the grain supply mechanism 40 includes a hopper 41 into which grains are input, a plurality of communication passages 42a that continuously pass through each of the hopper 41 and a plurality of moisture measuring units 31, It is provided with a communication member 42 on which 42b) is formed and a grain moving plate 43 as a plurality of grain moving members for moving the grains introduced into the hopper 41 to a predetermined communication path within the hopper 41.

As described above, the housing 20 is installed on the side wall of the bent portion 5 with the first side 21 facing the bent portion 5. Therefore, the hopper 41 is provided to be exposed to the inner space of the curved portion 5 from the upper side of the housing 20. The hopper 41 has a cylindrical shape with one end closed and the other end open. A portion of the hopper 41 protrudes into the inner space of the curved portion 5 through the intake port 21a, and one end of the cylindrical shape is directed diagonally downward. The opening on the other end side of the hopper 41 is directed obliquely upward at the curved portion 5. The hopper 41 is provided with a closing plate 41a that closes a part of the opening on the other end side in order to suppress the amount of grains input from the raised section 5 into the hopper 41.

The communication member 42 is a member formed with a passage continuously connecting one end of the hopper 41 and the upper part of the plurality of moisture measuring units 31. Specifically, when viewed from the first side 21 of the housing 20, a first communication path 42a is formed on the right side to continuously connect the hopper 41 and the first moisture measuring unit 31A, and the hopper is formed on the left side. A second communication path (42b) is formed that continuously communicates with (41) and the second moisture measuring unit (31B).

As shown in FIG. 3, a temperature sensor 44 is provided on the first side 21 exposed to the internal space of the curved portion 5 and at a position immediately below the hopper 41. The temperature sensor 44 is made up of a diode, for example. The temperature sensor 44 is a temperature sensor for measuring the temperature of the internal space of the raised portion 5. When the grain is conveyed from downward to upward by the grain raising section 5, that is, when the grain passes through the inner space of the grain lifting section 5 from downward to upward, the temperature sensor 44 measures the temperature of the inner space. do.

The reason for providing the temperature sensor 44 on the first side 21 exposed to the internal space of the raised portion 5 and immediately below the hopper 41 is that (1) it is placed in various positions to provide temperature data As a result of an experiment to acquire One reason may be that it is difficult to prevent damage to the temperature sensor 44.

As shown in Fig. 5, the temperature sensor 44 is connected to the measuring portion 31f on the substrate 31g by a cord or the like. Thereby, data on the temperature measured by the temperature sensor 44 is supplied to the measurement unit 31f. Additionally, data on the temperature inside the moisture measuring device 10 measured by the temperature sensor 31h provided on the substrate 31g is supplied to the measuring unit 31f.

The measuring part 31f measures the temperature of the inner space of the grain part 5 through which the grain passes, measured by the temperature sensor 44 provided immediately below the hopper 41, and the temperature provided on the substrate 31g. Based on the temperature inside the moisture measuring device 10 measured by the sensor 31h, the moisture content of the grain measured by detection of the electrical resistance value is corrected.

Specifically, the measuring unit 31f is supplied with temperature data inside the moisture measuring device 10 from the temperature sensor 31h on the substrate 31g, and from the temperature sensor 44 immediately below the hopper 41, When data on the temperature of the internal space through which the grains of the grain raising section 5 pass are supplied, the moisture content of the grains measured by detection of the electrical resistance value is corrected according to the following (Equation 2).

Moisture content of grains after correction = Moisture content of grains before corrections + B + C ‥ (Equation 2)

B: Correction value based on the temperature inside the moisture measuring device 10 measured by the temperature sensor 31h, C: Internal space of the valley section 5 through which grains pass, measured by the temperature sensor 44 Correction value by temperature

In this way, the moisture measuring device 10 not only measures the temperature inside the moisture measuring device 10 measured by the temperature sensor 31h, but also measures the temperature inside the moisture measuring device 10, which is measured by the temperature sensor 44, and the valley portion 5 through which the grain passes. ) The temperature of the internal space is also used to correct the moisture content of the grain measured by detection of the electrical resistance value using the above (Equation 2). As a result, the moisture measuring device 10 can measure the moisture content of the grain more accurately even if there is a difference between the temperature measured by the temperature sensor 31h and the temperature measured by the temperature sensor 44. .

Additionally, the moisture measuring device 10 provides a temperature sensor 44 at a position directly below the hopper 41 on the first side 21 exposed to the internal space of the curved portion 5. According to this moisture measuring device 10, unlike a moisture measuring device that corrects the moisture content of grains using, for example, the temperature measured by a temperature sensor inside the grain bin, the grain temperature does not need to be measured immediately. By using the temperature of the internal space of the passing grain section 5, a more accurate moisture content of the grain can be measured. Accordingly, according to the moisture measuring device 10, there is no need to extend and connect a cord or the like from the moisture measuring device to the temperature sensor in the milk barrel. Therefore, according to the moisture measuring device 10, problems such as having to connect the moisture measuring device and the temperature sensor in the milk barrel, which makes wiring work complicated for the operator at that time, do not occur.

And since the moisture measuring device 10 uses the temperature of the internal space of the grain part 5 in correcting the moisture content of the grain, it can measure the moisture content of the grain more accurately regardless of the amount of grain.

In this way, according to the moisture measuring device 10, it is possible to measure the accurate moisture content of grain without performing complicated wiring work, making it possible to realize a highly versatile moisture measuring device.

In this embodiment, an example in which two rollers such as the second roller 31d and the third roller 31e are supported on the second rotation shaft 31b has been described, but the present invention is not limited to this. One roller or three or more rollers may be supported on the second rotating shaft 31b.

1: Grain dryer 10: Moisture measuring device
31: moisture measuring unit 31f: measuring unit
31h: temperature sensor 31g: substrate
31A: first moisture measuring unit 31B: second moisture measuring unit
41: Hopper 44: Temperature sensor

Claims (4)

It is a moisture measuring device that measures the moisture content of grains.
a first temperature sensor provided on a substrate that controls the moisture measuring device and measuring the temperature within the moisture measuring device;
a second temperature sensor that measures the temperature of the space through which the grain is passing;
A moisture measuring unit that measures the moisture content of a portion of grains that have passed through the space,
Equipped with a hopper into which grains that measure the moisture content are input,
The second temperature sensor is exposed to the space through which the grain is passing and is disposed immediately below the hopper,
The moisture measuring unit corrects the moisture content of the measured grain based on the temperature in the moisture measuring device measured by the first temperature sensor and the temperature of the space through which the grain is passing as measured by the second temperature sensor. ,
The moisture measuring unit corrects the measured moisture amount according to the following equation,
Moisture content of grains after correction = Moisture content of grains before corrections + B + C ‥ (Formula)
Here, B is a correction value based on the temperature measured by the first temperature sensor, and C is a correction value based on the temperature measured by the second temperature sensor. According to paragraph 1,
The space through which the grain passes is the internal space of the grain unit capable of transporting grain, which is provided by a grain dryer that accommodates and dries grain,
The moisture measuring device is installed in the valley part,
The second temperature sensor is a moisture measuring device provided at a position exposed to the inner space of the curved portion. delete In the method of measuring the moisture content of grains using a moisture measuring device that measures the moisture content of grains,
The moisture measuring device is,
a first temperature sensor provided on a substrate that controls the moisture measuring device and measuring the temperature within the moisture measuring device;
a second temperature sensor that measures the temperature of the space through which the grain is passing;
A moisture measuring unit that measures the moisture content of a portion of grains that have passed through the space,
Equipped with a hopper into which grains that measure the moisture content are input,
The second temperature sensor is exposed to the space through which the grain is passing and is disposed immediately below the hopper,
The moisture measuring unit corrects the moisture content of the measured grain based on the temperature in the moisture measuring device measured by the first temperature sensor and the temperature of the space through which the grain is passing as measured by the second temperature sensor. ,
The moisture measuring unit corrects the measured moisture amount according to the following equation,
Moisture content of grains after correction = Moisture content of grains before corrections + B + C ‥ (Formula)
Here, B is a correction value based on the temperature measured by the first temperature sensor, and C is a correction value based on the temperature measured by the second temperature sensor.

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