JPH0975855A - Swinging speed control device of swinging sorting device - Google Patents

Abstract

(57) [Summary] [Structure] In an oscillating sorting device for oscillating sorting mixed rice,
It is configured to adjust the rocking rotation speed of the rocking / sorting plate 2, and the vibration states of the upside and downside rice on the discharge side of the rocking / sorting plate 2 are detected by the paddy / brown rice discrimination sensor 10, and the paddy / brown rice is detected. A rocking rotation speed control device of a rocking sorting device that controls the rocking rotation speed by comparing the detection result of the brown rice discrimination sensor 10 with a control reference value configured by the brown rice vibration frequency and the paddy vibration frequency in a predetermined time. . [Effect] It is possible to efficiently perform the sorting operation while maintaining the proper vibration state of the grain by the swing sorting plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating oscillating rotation speed control device for an oscillating sorting device.

[0002]

2. Description of the Related Art As a technique for controlling the frequency of a swing selecting device, there is JP-A-55-20620.

[0003]

SUMMARY OF THE INVENTION In the invention of the above publication, a sensor detects a flow distribution state of grain on the upside and downside of a swing selection plate, and shakes in association with the detection result of this sensor. The dynamic rotation speed is controlled so that the grains are distributed over the entire width of the rocking sorting plate to improve the sorting efficiency. In the above invention, the grain is controlled so as to be distributed over the entire width from the swaying side to the swaying side of the oscillating sorting plate, but is it distributed over the entire width in a state where the supply amount is large and the grain layer thickness is thick? , Or
It is unclear whether or not they are distributed over the entire width in a state where the selection efficiency increases with an appropriate layer thickness, and it does not truly improve the selection efficiency.

Therefore, according to the present invention, when the mixed rice is sorted by the rocking sorting plate, when the vibration pattern of the brown rice distributed on the upper side of the swing has a predetermined frequency in a predetermined time, the sorting efficiency is improved. The present invention was invented based on the knowledge that the improvement of the grain size is improved, and the grain size is distributed over the entire width from the rocking side to the rocking side in a proper selection state to truly improve the selection efficiency.

[0005]

The present invention has taken the following technical means in order to improve the prior art. That is, according to the present invention, an oscillating sorting plate 2 for oscillating and sorting mixed rice, a brown rice partition plate 4 and a paddy partitioning plate 5 arranged to face the discharge side of the oscillating sorting plate 2, and the oscillating plate A swinging rotation speed adjusting means for adjusting the swinging rotation speed of the dynamic sorting plate 2, and a paddy / brown rice discrimination for detecting the vibration state of the upside brown rice and the downside rice on the discharge side of the swing sorting plate 2. The sensor 10, the swinging rotation speed control means for adjusting the swinging rotation speed adjusting means in relation to the detection result of the paddy / brown rice discrimination sensor 10, and the swinging rotation speed control means by the brown rice vibration frequency at a predetermined time. And a control reference value setting means for setting the control reference value, and a swing rotation speed control device of the swing sorting device.

[0006]

The paddy / brown rice discrimination sensor 10 detects the vibration sorting state of grains while reciprocating from the rocking side to the rocking side of the rocking / sorting plate 2. While the paddy / brown rice discrimination sensor 10 is moving on the upper side of the rocking sorting plate 2, vibration sorting information of brown rice is detected and input, and the paddy / brown rice discrimination sensor 10 is swung on the rocking sorting plate 2. While moving on the side, the vibration selection information of the paddy is detected and input.

However, the frequency of brown rice at a predetermined time is compared with the control reference value to detect whether or not the grain is in the proper sorting state based on the vibration state, and when the detection information is low (or high), shakes. The dynamic rotational speed is controlled to increase (or decrease), and the rocking rotational speed is increased (or decreased).

[0008]

EXAMPLE First, the example shown in FIGS. 1 and 2 will be described. As shown in FIG. 1, the rocking / sorting plate 2 of the rocking / sorting device 1 is inclined such that the supply side 2a on one side in the vertical direction is set to a high position and the discharge side 2b on the other side is set to a low position, and One side in the horizontal direction is the upper rocking side 2c and the other side is the lower rocking side 2d.
The mixed rice is supplied from the mixed rice hopper 3 located on the supply side 2a and the upside 2c in the vertical direction.

When the mixed rice hopper 3 supplies the mixed rice to the rocking / sorting plate 2, the mixed rice is fed from the supply side 2a to the discharge side 2b, and is subjected to a lateral slanting vertical reciprocal rocking to sort. The small, heavy brown rice is unevenly distributed on the swaying side 2c side, and the large, light-weight paddy is unevenly distributed on the swaying side 2d side, and the mixed rice is unevenly distributed on the middle part thereof. Be selected.

A brown rice partition plate 4 and a paddy partition plate 5 for partitioning the selected grains are arranged facing the discharge side 2d of the rocking sorting plate 2. The brown rice partition plate 4 is supported by a brown rice partition plate moving means 6 composed of a screw rod so as to be reciprocally movable. It is a composition. Although illustration is omitted, the deciduous rice hulled by the hulling part consisting of a pair of hulling rolls, etc. is wind-selected by the slide-down rice wind selection part, and then mixed after the wind selection. The rice is fried by a mixed rice fried machine and supplied to the oscillating sorting plate 2 of the oscillating sorting device 1. The brown rice sorted by the rocking sorting plate 2 and partitioned by the brown rice partition plate 4 is taken out of the machine through the brown rice lifting machine and is also mixed by the brown rice partition plate 4 and the paddy partition plate 5. The rice is re-sorted by being fed again to the rocking sorting plate 2 together with the scraped rice through the mixed rice lifting machine. In addition, the paddy separated by the paddy partition plate 5 is returned to the paddy-sheathing section through the paddy-grinding machine, and the paddy-cutting is performed again.

Reference numeral 10 is a paddy / brown rice discrimination sensor. The paddy / brown rice discrimination sensor 10 is configured to detect the grain being sorted on the plate surface of the rocking sorting plate 2, and is movably supported by a sensor moving means 11 formed of a screw rod, and a sensor adjustment motor. By rotating 12 normally or reversely, the paddy / brown rice discrimination sensor 10 reciprocates at a predetermined speed in the lateral direction from the rocking upper side 2c to the rocking lower side 2d, while the distribution of the grains being selected by the rocking sorting plate 2 This is a configuration that detects the state, whether the grain is paddy or brown rice, and the frequency and amplitude of the grain.

In this embodiment, the paddy / brown rice discrimination sensor 10 is constructed as follows. A light source section for irradiating light including a wavelength range absorbed by moisture, and a light range where the light is irradiated to the grain from the light source section and reflected light from the grain is received by an optical filter section, and the wavelength range is absorbed by the moisture. Only passes through the optical filter section and is sent to the photodetector element section, where it is converted into a large and small voltage according to the amount of light in the wavelength range, and the converted large and small voltage values are built into the CPU. Is sent to the discriminating unit of the control unit 13 of No.
It is identified as brown rice. Note that the detection wavelength range is not limited to the infrared light described above, and it is also possible to discriminate between paddy and brown rice based on the magnitude of the amount of transmitted light or the amount of reflected light in other wavelength ranges of infrared light.

The paddy / brown rice discrimination sensor 10 is connected to a control unit 13 having a built-in CPU via an input interface, and the control unit 13 outputs a brown rice partition plate adjusting mode via an output interface. Motor 8, sensor adjustment motor 1
2. A control command signal is output to the swing rotation speed adjusting motor 14 for adjusting the swing rotation speed adjusting means (not shown).

Next, the control contents of the control unit 13 will be described. A movement command signal is output to the sensor adjustment motor 12 of the control unit 13, and the paddy / brown rice discrimination sensor 10 reciprocates above the discharge-side grain being sorted by the swing sorting plate 2 from the rocking side to the rocking side. Moving. Then, the light source section of the paddy / brown rice discrimination sensor 10 is irradiated with light including a wavelength range absorbed by water, and the reflected light is sent to the optical filter section, and the wavelength range absorbed by water is included in the light. Only the light passes through the optical filter section and is sent to the photodetector element section. Then, depending on the amount of light in the wavelength range, it is converted into a large or small voltage value by the photodetector element section, and then, according to the magnitude of the detected voltage value, based on a predetermined determination threshold value Is determined. The light may be near infrared light.

Next, the detected value is compared with the reference value, and when the detected value is higher than the reference value, the brown rice partition plate 4
Is controlled to move to the upper side by the reference movement amount, and when the detected value is lower than the reference value, control is performed to move the brown rice partition plate 4 to the lower side by the reference movement amount.
When the detected value is within the range of the reference value, the control command signal is not issued and the brown rice partition plate 4 is controlled to maintain its position.

While the paddy / brown rice discrimination sensor 10 is moving on the rocking upper side 2c of the rocking / sorting plate 2, as shown in FIG. 3 (2), the state in which the layer thickness of brown rice changes in the vertical direction, that is, The frequency and amplitude of the paddy are detected and input to the control unit 13, and during the movement of the rocking side 2d of the rocking sorting plate 2, as shown in FIG. Detected by the control unit 13
Is input to

In the proper selection state, as shown in FIG. 3, when the frequencies of the paddy and the brown rice are compared at the rocking rotation frequency (eg, 303 rotations) in a predetermined time (eg, 1 minute), the frequency of the brown rice is It is 2-3 times the frequency of the paddy. Therefore, the control reference value (brown rice vibration frequency for a predetermined time) k can be calculated as
By setting 3>k> oscillation rotation speed × 2,
It is possible to determine whether or not the brown rice is in the vibration state of proper selection.

While the paddy / brown rice discrimination sensor 10 is moving on the upside, the frequency of brown rice at a predetermined time is input as detection information and compared with the control reference value, so that the detection information is low (or high). ), The swing rotation speed increase (or decrease) command signal is output, and the swing rotation speed is increased (or decrease) adjusted, and when it is within the control reference value range, the control command signal is not output. , Control is performed to maintain the swing rotation speed as it is.

Next, another embodiment will be described with reference to FIG. When the oscillating sorting plate 2 is in the proper sorting state, the frequency, which is the change in the layer thickness direction of the swaying grain, is synchronized with the oscillating rotation speed, and this frequency is related to the suitability of the sorting state. There is.
Then, a frequency analysis is performed on the frequency that is a change in the layer thickness direction to obtain the fundamental vibration, the harmonic vibration and the power value, and the control reference value is set based on the analysis result, and the rocking selection plate 2 It is intended to control the swing speed.

In FIG. 4, (1) shows the horizontal axis as time,
The vertical axis shows changes in the grain thickness direction of the grain, and this frequency is in synchronization with the swing rotation speed of the swing selection plate 2, and FIG. Power analysis,
The horizontal axis represents frequency and the vertical axis represents power value. From this power analysis, the rocking state of the grain can be detected. For example, when the grain supply amount is large and the swinging rotation speed is low and the grain to be sorted is in a dull state, the power value of the low-order harmonic frequency increases, and at the time of high efficiency, the power value becomes low. The power value of the next harmonic frequency tends to decrease.

Therefore, a predetermined number of harmonic frequencies and power values during a predetermined time in the proper selection state are set as control reference values, and the detected harmonic frequencies are compared with the control reference value to detect detected harmonic vibrations. When the number is large, the rocking speed is adjusted to the increasing side to control from the low efficiency state to the proper selection state.When the detected harmonic frequency is small, the rocking speed is adjusted to the decreasing side. It is possible to improve the sorting efficiency while returning to the proper sorting state and securing the sorting accuracy.
As described above, since the control reference value is set based on the movement of the grain in the swinging sorting plate 2 in the sorting state, the proper sorting state can be accurately determined, and the sorting efficiency control is accurate. Become.

[0022]

As described above, according to the present invention, when the paddy / brown rice discrimination sensor 10 detects the sorting state of the swing sorting plate 2,
The detected information is compared with the control reference value consisting of the vibration frequency of the upside-down brown rice in a predetermined time, and the oscillation speed is controlled in a related manner, so that the proper vibration state of the brown rice is maintained and the sorting efficiency is improved. Meanwhile, the sorting work can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view

FIG. 2 is a block diagram.

FIG. 3 is a graph showing vibration states of paddy and brown rice.

FIG. 4 is a graph showing a vibration state of paddy and a graph showing harmonic vibration based on frequency analysis.

[Explanation of symbols]

 1 Swing Sorting Device 2 Swing Sorting Plate 3 Mixed Rice Hopper 4 Brown Rice Partition Plate 5 Paddy Partition Plate 6 Brown Rice Partition Plate Moving Means 8 Brown Rice Partition Plate Adjusting Motor 10 Paddy / Brown Rice Discriminating Sensor 11 Sensor Moving Means 12 Sensor Adjusting Module -Motor 13 Control unit 14 Oscillation speed adjustment motor

Claims (1)

[Claims] 1. An oscillating sorting plate 2 for oscillating sorting of mixed rice,
A brown rice partition plate 4 and a paddy partition plate 5 which are arranged to face the discharge side of the rocking sorting plate 2, and a rocking rotation speed adjusting means for adjusting the rocking rotation speed of the rocking sorting plate 2. The paddy / brown rice discrimination sensor 10 for detecting the vibration state of the upside brown rice and the downside paddy on the discharge side of the swing selection plate 2;
The rocking rotation speed control means for adjusting the rocking rotation speed adjusting means in relation to the detection result of the brown rice discrimination sensor 10 and the control reference value of the rocking rotation speed control means are set according to the brown rice vibration frequency at a predetermined time. An oscillating rotation speed control device for an oscillating sorting device comprising a control reference value setting means.