Grain quality discrimination device

Abstract

The purpose of the present invention is to enhance the precision of quality discrimination of a grain G by a grain quality discrimination device. The present invention is provided with an optical unit 3 for radiating light to a grain G, receiving reflected light and / or transmitted light from the grain G through use of a light receiving sensor and obtaining information for quality measurement from a surface side and a back side of the grain G, and a quality discrimination unit 7 for discriminating the quality of the grain G on the basis of the information. The precision of quality discrimination of the grain G is enhanced by configuring the present invention so that the surface-side information and the back-side information are obtained simultaneously by a single optical unit 3, preventing misalignment of acquired information due to movement of the grain G or a change in the orientation thereof, removing a reference plate for correcting the information from the movement path of the grain to prevent contamination or damage, thereby preventing corruption of the information, and by also taking such measures as providing a special reference plate for lateral-face information of the grain G to increase the precision of the lateral-face information.

Description

technical field [0001] The present invention relates to a grain grade discriminating device for discriminating the grade of grains. Background technique [0002] At present, there is known a grain grade discriminating device, which irradiates light to the grain, receives reflected light and / or transmitted light from the grain, and judges the grade of the above-mentioned grain according to the received signal (for example, refer to the patent Literature 1.). [0003] The grain grade discrimination apparatus described in patent document 1 includes: a conveyance part which conveys grain; two optical detection parts arrange|positioned in the conveyance direction of this conveyance part; and a grade discrimination part. [0004] The first optical detection unit in the above-mentioned grain grade discriminating device is equipped with: a red light-emitting diode lamp for irradiating red light on the grain from obliquely above and a green light-emitting diode lamp for irradiating ...

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Problems solved by technology

[0010] However, the above-mentioned grain grade discriminating device has the following problems: since it includes two optical detection units having the same scanning speed, a wide arrangement space is required, the device is enlarged, and the cost is increased.

[0011] In addition, since the above-mentioned grain grade discriminating device is provided with an optical detection unit at a position separated along the conveying direction of the grain, it cannot simultaneously receive reflected light or transmitted light from the surface and side of the grain, and light from the back surface of the grain. reflected or transmitted light

Therefore, there is the following problem: if the conveying speeds of the grains are slightly different when passing through the two optical detection parts respectively, the number (number of times) of received light signals will be different on the surface and the back side of a grain (the instability of the moving speed )

In addition, there is also a problem that if the postures of the grains passing through the two optical detection units are not exactly the same, the planar shape will be different on the front and back of one grain (accompanied by the change in the posture of the conveyed grains).

[0014] The grain grade discrimination devices of Patent Documents 2 and 3 use the above-mentioned reference plate to correct the changes in the characteristics of optical elements such as the light source and light-receiving sensor in the optical detection unit due to the influence of temperature changes inside the main body, etc., but the reference plate is installed on the above-mentioned The concave portion of the rotary disk of the grain conveying unit has the following problems: the grains supplied to the above-mentioned rotary disk contact to cause scratches or dirt, and the quality of the grains is degraded.

[0015] In addition, in the above-mentioned grain grade discriminating device, since the above-mentioned reference plate is attached to the concave portion of the rotating disk of the above-mentioned grain conveying unit, there is a problem that if the reference plate is damaged, fragments will be mixed in the supply to the above-mentioned. Grains on a rotating disc

However, since the grain grade discriminating device described in Patent Document 4 is a correction method using reflected light from a cuboid-shaped reference plate planarly installed in the concave portion of the rotating disc, the side surface of the reference plate The amount of received light is extremely small, and the correction factor cannot be calculated for the side information

Therefore, there are practically uncorrectable problems

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