JPH0295477A - Screening device - Google Patents

Abstract

PURPOSE:To improve screening efficiency by providing a television camera which picks up the front surface of a screening plate, an image processing means, an inclination driving means which controls the inclination angle of the screening plate to the above device. CONSTITUTION:The television camera 11 is so positioned that the areas X1 to X3 of the areas X1 to X6 dividing the image pickup range 14 of the television camera 11 in the transverse direction of the screening plate 1 detect a mixed rice layer A2, and X4 to X6 detect an unpolished rice layer A3 at the time of starting the screening operation. The inclination driving means 3 is instructed to decrease the inclination of the screening plate 1 and to control a boundary line B2 so as to return to the center of the image pickup range when an image processing means 12 detects the deviation from the center of the image pickup range. A limit detection signal which indicates that the inclination of the screening 1 attains the state of an upper or lower limit is inputted form the inclination driving means 3 to the image processing means 12. The processing capacity is greatly improved in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sorting device used for sorting mixed rice after hulling into brown rice and paddy.

BACKGROUND OF THE INVENTION A sorting device of this type is constructed as disclosed in Japanese Patent Application Laid-open No. 104681/1983. Figures 4 and 5 show the outline.

The sorting plate 1 is supported via a rolling drive means 3 and a vibration device 2. When the mixed rice 5 is supplied to the upper end 4 of the sorting plate 1, the mixed rice 5 is transferred to the sorting plate 1 by the friction and vibration of the sorting plate 1.
It is transferred toward the 0th end 6. During this transfer, a flow distribution of the paddy layer M, mixed rice NJA2, and brown rice MA3 occurs on the upper surface of the sorting plate 1, as shown in FIG. B
1 is the boundary between the m layer A1 and the mixed rice layer g, and B2 is the boundary between the mixed rice layer and the brown rice mA3. Lower end 6 of sorting plate 1
The first section is movable in the width direction. A second partition plate 7.8 is provided, and the partition plate 7 @1 is connected to the boundary line B1.8. The second rice grain layer 8 is positioned corresponding to the boundary line B2. A photoelectric sensor 9 is attached to the second partition plate 8, which detects the position of the boundary line B2 by utilizing the difference in light reflectance between the mixed rice layer and the brown rice layer M, and detects the position of the boundary line B2. The partition plate driving means 1 is moved so that the position of
0 control, the position of the partition plate 8 is changed.

Problems to be Solved by the Invention In such a conventional configuration, the position of the partition plate 8 is changed based on the signal from the photoelectric sensor 9, and only brown rice is sorted from the fixed area C divided by the partition plate 8. However, since the detection area by the photoelectric sensor 9 is a spot, the response is slow and the accuracy is low when controlling the position of the partition plate 8 and the boundary line B2. Therefore, the partition plate 8 is set on the safe side so as to be located inside the brown rice mA3 from the position of the actual boundary line B2 to prevent mixed rice from getting mixed into the sorted and fixed brown rice. Since it is necessary to set it on the safe side in this way, the amount of brown rice that can be taken out by sorting is reduced, and the processing capacity is low.

An object of the present invention is to provide a sorting system that can improve control performance and increase processing capacity compared to conventional systems.

Ninth means of solving the problem The present invention O'iI! Separate device! 1 supplies the mixed grains to the upper end of the 9-slanted sorting plate, and separates the grains by applying vibration to the sorting plate so that the mixed grains are transferred toward the lower end; a television camera that images the upper surface; an image processing means that recognizes the boundary line of the grain flow distribution from the video signal of the television camera; The invention is characterized in that it is provided with an inclination drive means for controlling the inclination angle of the sorting plate so that it approaches the angle of inclination of the sorting plate.

According to this configuration, the television camera captures the boundary line of the flow distribution within the imaging range, and the image processing means inclines and causes the drive unit to change the inclination angle of the sorting plate so that the boundary line approaches the specified position. Instruct.

EXAMPLE Hereinafter, an example of the present invention will be described based on the first (2) to third pieces. Components having the same functions as those shown in FIGS. 4 and 5 showing the conventional example will be described with the same reference numerals.

Figures 1 and 2 show the oscillating sorting device + of the present invention! tt, a television camera 11 and an image processing means 12 are provided in place of the photoelectric sensor 9 in FIG. Here, a television camera 1 is fixed to a fixed side 13 so that it can be moved. The television camera 11 is automatically positioned so that the set boundary line position is at the center of the imaging range.

FIG. 3 shows the configuration of the image processing means 12 that processes the video signal of the television camera 11. 31! At the start of the i-separate operation, the imaging range 14 of the television camera 11 is
is divided into t areas Xi-X in the width direction of the sorting plate 10.

Area L, X1. The television camera 11 is positioned so as to detect: Xs is mixed rice iA2, area X4, Xi, Xa is brown rice layer A3'+: boundary line B2
coincides with the center of the imaging range as the prescribed position. The partition plate 8 is also located at a position corresponding to the center of the imaging range.

The image processing means 12 determines the boundary line B? as shown in (b). When it detects that it is displaced in the direction of the arrow ■ and deviates from the center of the imaging range, it instructs the driving means 3 to reduce the strain on the sorting plate 1 (as shown in cl) so that the boundary line B2 is (dl
The mechanism shown in Figure 2 controls the camera to return to the center of the imaging range. In addition, if the boundary line B2 is displaced in the direction of the arrow 1■ and it becomes clear that it has deviated from the center of the imaging range, the driving means 3 is instructed to remove the trouble of the sorting plate 1 (as shown in fl). control is made so that the boundary line B2 returns to the center of the imaging range as shown in (g).

Note that the image processing means 12 receives a limit detection signal 15 from the tilt driving means 3 indicating that the rotation of the sorting plate 1 has reached the upper limit and the lower limit. If the boundary line B2 does not return to the center of the imaging range as shown in fhl even after lowering the sorting plate 1t- as shown in (c) and lowering the sorting plate 1t- to the lower limit position, the dividing plate driving means 10 It is configured so that only brown rice can be sorted by giving an instruction and moving the partition plate 8 according to the position of the boundary line B2 at that time as shown in (). The control state U continues until the partition plate 8 returns to the central position shown in (hJ), and then (b) and (d
As shown in l, (el and (gl), the sorting plate 10 angle control is returned. Also, as shown in (jl and (kl), even if the sorting plate 1t is raised to the upper limit, the position of the boundary line B2 does not return to the center position. Even if there is no partition plate 8, the position control of the partition plate 8 is performed in the same way as in the cases shown in (hl and (j)).

Effects of the Invention According to the present invention, the image processing means changes the inclination of the sorting plate through the driving means so that the boundary line captured by the television camera approaches the prescribed position of the imaging range. Compared to spot detection and control using sensors, the monitoring range is wider, response and accuracy are improved, and only the necessary grains can be sorted without having to set the partition plate on the safe side as in the past. This greatly improves processing capacity.

[Brief explanation of the drawing]

The fyJI diagram is a front view of one embodiment of the oscillating sorting device of the present invention, the second diagram is a plan view of the main parts of the same device, FIG. 3 is a diagram explaining the configuration of the image processing means of the same device, and FIG. 5 is a schematic configuration diagram of a conventional oscillating sorting device, and FIG. 5 is a plan view of the same device. DESCRIPTION OF SYMBOLS 1... Sorting plate, 2... Vibrating device, 3... Hard driving means, 8... Partition plate, 11... Television camera, 12
...Image processing means, 14...Imaging range, B2...
border. Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] 1. Feed the mixed grains to the upper end of the slanted sorting plate, and apply vibration to the sorting plate to separate the grains so that the mixed grains are transferred toward the lower end. a television camera to take an image; an image processing means for recognizing a boundary line of the grain flow distribution from a video signal of the television camera; and a boundary line recognized by the image processing means approaches a prescribed position within an imaging range of the television camera. A sorting device is provided with a drive means for controlling the inclination angle of a sorting plate.