JPH0348730A - Grain amount detection device for grain drier or the like - Google Patents

Abstract

PURPOSE:To measure the accurate amount of grains by calculating the difference between a distance to an index which is detected during operation and a stored distance to the index and correcting the amount of grains. CONSTITUTION:Grains are diffused by a diffusion device, etc., and supplied and charged in a storage chamber 1. An ultrasonic wave sent by a grain sensor 2 is reflected by the index 3 of an object up to right before the grains begin to be charged, and the time from the transmission to the reception of the ultrasonic wave is detected to calculate the distance to the index 3. The measured distance to the index 3 is compared with the previously stored distance to the index 3 to calculate the difference as a correction value. Then when the grain begin to be charged, the ultrasonic wave sent by the grain sensor 2 is reflected by a grain as the object and the time from the transmission to the reception of the ultrasonic wave is detected. The distance to the grain is calculated from the detected time and the correction value is added to obtain the accurate charged amount of grains.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a grain amount detection device such as a grain dryer.

Conventional technology Conventionally, the amount of grains loaded into a storage chamber for storing grains was detected by using a grain sensor to detect the distance to the grains, and the amount of grains loaded was determined based on this detected distance. The device was detected while the machine was in operation or stopped.

Problems to be Solved by the Invention Grain is diffused and supplied into a storage chamber by a diffusion device or the like, and the amount of grains loaded into the storage chamber can be detected using, for example, ultrasonic waves emitted from a grain sensor. hits the grain of the opposing object and is reflected, the time from transmission to reception of this tIIM wave is detected, and from this detection time the distance to the grain of the opposing object is calculated. However, there were cases where the amount of grains being loaded could not be accurately detected due to detection errors due to noise caused by the grains diffusing during loading and errors in the ultrasonic reflection rate due to the influence of the temperature in the storage chamber. .

Means for Solving the Problems This invention provides a grain sensor (2) in a storage chamber (1) for storing grains, which detects the distance to the surface of the loaded grains stored in this storage chamber (1). ), the storage chamber (1) is provided with an index (3), and the position data of the index (3), which has been set and stored in advance, and the grain sensor ( An error determination means for comparing the data at the detection index (3) according to 2) and calculating the difference is provided, and the grain-soft filling data detected by the grain sensor (2) is corrected by the above difference. The grain amount detection device, such as a grain dryer, is configured with one stage of correction.

Effect of the Invention Grain is diffused and supplied into the storage chamber (1) of the grain dryer using a diffusion device or the like, and the amount of grains loaded in the storage chamber (1) is detected by For example, just before starting the grain tensioning operation, the ultrasonic waves communicated from the grain sensor (2) hit the indicator (3) of the opposing object and are reflected 17. The reception time is detected from the transmission of this ultrasonic wave, and the distance of the index (3) is calculated from this detection time.
) is compared with the memorized distance to this index (3), and the difference is determined. The ultrasonic wave that is emitted hits the grain of the opposing object and is reflected, the time from the transmission of this ultrasonic wave to its reception is detected, and the distance to the grain of the opposing object is calculated from this detection time. The difference detected above is corrected to the calculated distance, and the amount of grains to be loaded is detected based on the corrected distance.

Effects of the Invention According to this invention, the difference between the distance to the index (3) detected during the 2M rotation and the memorized distance to the index (3) is calculated, and this calculated difference is used as a correction value to calculate the grain. By correcting the amount of grains detected by the grain sensor (2), noise-related detection errors and errors in ultrasonic reflection speed become more significant, so the amount of loaded grains detected is not accurate. The grain size can be obtained.

Embodiment Note that the rotating chamber (4) is a grain dryer, and the interior of the drying wall (5) of this dryer (4) is equipped with a ventilation net on both sides. ) The upper part communicates with the storage chamber (1), and the lower part communicates with the grain collecting trough (8) equipped with a T-transfer spiral through the delivery valve (7), and the storage chamber (
1,) is formed into a cavity surrounded by the machine wall (5), and on the h side of this storage chamber (1), a ceiling plate (9) and a transfer gutter (10) equipped with a transfer spiral are installed ( There is a supply port in the center of this transfer gutter (lO) for supplying the transferred grains into this storage chamber (1), and the lower side of this supply port is for distributing grains evenly into this storage chamber (1). There is a Tachibana 1P that has a diffuser side light enlargement rt!! and a board (IT).

The bottom plate of the transfer gutter (10) is provided with a grain amount detection device (t) for detecting the amount of grains to be loaded into the storage chamber (1,), and this grain amount detection device is connected to a grain sensor (2). ), and by transmitting an electrical measurement signal from the operating device ff1 (1?),
This grain sensor (2) emits ultrasonic waves and receives the a-sonic waves that are reflected by hitting the grains of the opposing object or the index (3), and the time from the transmission of this ultrasonic wave to its reception is Detection and from this detection time, grains of the opposing object or the index (3
) is detected, and the amount of grain stuffed into the storage chamber (1) is detected based on this detected distance, and the indicator (3) is used to reinforce the inside of the storage chamber (1). This structure also serves as a reinforcing device for the purpose of

A hot air chamber (12) is formed between the inner sides of the drying chamber (6),
A hot air temperature sensor (13) for detecting the hot air temperature is installed inside the hot air chamber (12), and an exhaust chamber (10 is formed outside the drying chamber (6) 2, and the machine wall (5) on the front side burner (
15) Birch case (1G) with interior and the drying 4
! ! (4) An operating device (17) for starting and stopping the
), and the burner (15) and the hot air chamber (12) are configured to communicate with each other, and the rear machine wall (5) is provided with an exhaust air 4.
11 (18) and a motor (+9) are installed, and this exhaust fan (
18) and the six ventilation chambers (14) are configured to communicate with each other, and the motor (19) operates the transfer spiral in the grain collection gutter (8), each of the delivery valves (7), and the ventilation machine. (18):g
The configuration is such that it rotates.

A fuel pump (20) having a fuel valve is installed on the outer side of the lower plate of the burner case (18).By opening and closing this fuel valve, the fuel pump (2o) sucks the fuel in the fuel tank (21). It is configured to supply air to the burner (15), and a blower (22) and a variable speed motor (
23), and the rotation of this variable speed motor (23) drives this blower (22) to rotate, and this blower (22) blows combustion air commensurate with the supplied fuel to the burner (15). .

The grain raising machine (24) is installed in the front part of the machine wall (5) on the front side, and a packet conveyor (25) belt is stretched inside between the lower pulley 1 and the lower pulley. ) A discharge gutter (28) is provided between the starting end and the grain collecting gutter (8) for communication, and a supply gutter (27) is provided and communicated between the lower end and the terminal end of the grain collecting gutter (8). A motor (2B) is installed on the upper part of this grain hoist (20), and this motor (2B) moves the packet conveyor (25) belt, the transfer spiral in the transfer gutter (IO), and the spreader plate ( 11) is configured to rotate and drive the packet conveyor (25) in the lower central part of the packet conveyor (25), which receives grains that fall during conveyance, and crushes the grains under pressure at the same time. Moisture sensor (42) equipped with a motor (29) that detects the moisture in this crushed grain
This is a configuration with a

The operating device (17) is box-shaped, and the surface plate of the box has the drying a (4) as a masterpiece! Each start switch (30) is operated to start the separate loading, drying, and discharge operations, a stop switch (31) is operated to stop this dryer (4),
A temperature setting knob (32) for setting a standard value of the temperature of the hot air generated from the burner (15) according to the operating position, and a moisture setting knob (33) for setting the standard moisture content of grains according to the operating position. , a display window (34) that alternately displays the hot air temperature, grain moisture, amount of grain loaded, remaining drying time, etc., and a two-way display, etc. are installed, and a drying control device (35) and a combustion control device are installed inside. 2i (3B), and each of the setting switches (32) and (33) is a rotary switch type, and a predetermined numerical value is set according to the operating position.

The combustion control device (38) converts the detected values detected by the grain center (2) and the hot air temperature sensor (13) into A-
An A-D converter (37) that performs D conversion, an input circuit (to which the converted value converted by this A-D converter (37) is input)
3B), an input circuit (39) in which the temperature setting dispenser (32) is operated manually, and each of these input circuits (38), (3B).
A CPU (40) that performs arithmetic and logical operations, comparison operations, etc. on various input values input manually from the CPU (40), and an output circuit (41) that receives various commands from the CPU (40) and outputs them.
).

The drying control device 21 (35) includes the moisture sensor (4).
2) an A-D converter that converts the detected value detected by A-D converter;
An input circuit to which the converted value converted by this A-D converter is input, and an input circuit to which the operations of the start switch (30), the stop switch (31), and the moisture setting knob (33) are input. , the CPU performs arithmetic and logical operations, comparison operations, etc. on various input values input from each of these input circuits.
(40) This configuration includes an output circuit that receives and outputs various commands from the CPU (40).

...In the pitched grain spot detection control and combustion control by the combustion control device (38), each of the start switches (30) is operated and grain pitching or grain circulation is started. Previously, ultrasonic waves were emitted from the grain sensor (2), the distance to the index (3) was detected and inputted to the CPU (40), and this input actual measured distance (a) and this CPU
The CPU (40) compares the set memory distance #, (b) to the index (3) set and stored in (40), determines the error, and calculates the distance difference. This CP
This calculated soil difference is stored in U (40) and becomes the soil correction value (c), and when the grain is staked or the circulation of the grain is started, the distance to the staked grain is determined. Grain sensor (2
), the measured distance to this grain is corrected by the distance correction value (c), the amount of grain is detected based on this corrected distance, and this detected amount of grain is the displayed grain. The configuration is such that the amount is displayed on the display window (34) and simultaneously stored in the CPU (40).

The temperature of the hot air generated from the burner (15) is set based on this displayed grain amount and the operating position of the temperature setting knob (32), and this set hot air temperature and the hot air temperature sensor (
13) is compared with the detected hot air temperature, and if there is a difference, the number of openings and closings of the fuel valve is controlled so that the hot air temperature is equal to the set hot air temperature, and the fuel pump (20) sucks and supplies the fuel. In this configuration, the amount of fuel to be used is controlled by the combustion control device (3B).

The drying control by the drying control device (35) is performed when the moisture sensor (42) detects the same grain moisture as the finishing target moisture set by operating the moisture setting knob (33). 35), the dryer (4) is automatically stopped.

Hereinafter, the operation of the above embodiment will be explained.

By operating the start switch (30) of the operation device ff1 (17) that starts the tensioning work, the grain dryer (4) is started, and at the same time, the grain sensor (2) is started and the indicator (
The distance to 3) is detected, and the measured and detected distance is compared with this set memory distance in which the distance to the index (3) is set and stored, and the difference in ground is calculated. It is stored as a correction value. When the grain tensioning operation is started, the grains are transferred to the packet conveyor (25) of grain raising Ia (24).
) and is transported to the upper part through the dispensing tube (26) and into the transfer gutter (l).
from this transfer gutter (10) to the diffusion plate (1
1) It is transferred upward by the upper transfer spiral, and this diffusion plate (
11), the grains are evenly diffused and returned into the storage chamber (1), and the amount of grains supplied into the storage chamber (1) is detected by the grain sensor (2).
The distance to this grain is detected by the ultrasonic waves emitted from the grain, and this detected distance is corrected with the previously calculated correction value, and the grain is stretched into the storage chamber (1) based on this corrected distance. The detected grain amount is displayed on the display window (30) of the operating device (17), and when the storage chamber (1) is full of grains, the stop switch (31) is activated. Operate to stop the drying!l (4).

The temperature of the hot air generated from the burner (15) is set according to the detected amount of loaded grains and the operating position of the temperature setting knob (32), and the finishing target moisture content is determined by the operating position of the moisture setting knob (33). is set and the dryer (4) is operated by operating the start switch (30) to start drying work.
, the burner (15), the moisture sensor (42), etc. are started, and the set hot air temperature is generated from the burner (15), and this hot air flows from the storage chamber (1) into the drying chamber (6). The grains flowing down the drain are exposed to dryness, are fed out to the bottom by the feed valve (7), flow down, and are delivered to the grain collecting trough (8).
m (27), u packet conveyor (25), the dispensing tube (213), the transfer gutter (10), the spreading plate (11
) to the storage chamber (1) and are dried while being repeatedly circulated, and when the moisture sensor (42) detects the same grain moisture as the finishing target moisture, the control device! ! (17) The drying control device 2t (35) automatically controls and automatically stops the dryer (4).

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a flowchart, Fig. 3 is a relationship between the set storage distance of the index and the measured distance, and Fig. 4 is a grain diagram. Figure 5 is an overall side view of the dryer that can be partially cut away, Figure 6 is a sectional view taken along line A-A in Figure 5, and Figure 7 is a partial view of the dryer. FIG. 3 is an enlarged front view with a portion cut away. 5 in the figure (1) is a storage chamber, (2) is a grain sensor, (3
, ) indicates an index. Fig. 2 Fig. 3 Pincer opening a → Fig. 6

Claims (1)

[Claims] A grain loading amount detection device that includes a grain sensor (2) in a storage chamber (1) for storing grains, which detects the distance to the surface of the loaded grains stored in this storage chamber (1). An index (3) is provided in this storage chamber (1), and the index (3) position data set and stored in advance and the index (3) position data detected by the grain sensor (2) are stored. A grain dryer such as a grain dryer is provided with an error determination means for calculating a difference by comparing with the grain sensor (2), and a correction means for correcting the grain amount filling data detected by the grain sensor (2) by the above-mentioned difference. Particle amount detection device.