JPS58129257A - Detecting apparatus of body cracked grain of rice grain - Google Patents

Abstract

PURPOSE:To make highly accurate and highly efficient detection of a body cracked grain possible always, by detecting optically the body cracked grain by projecting light directly to a grain of rice in a passing locus. CONSTITUTION:A grain of rice is flowed down from a terminal of a flowing down through 5 to a rice collection cylinder 22 through a prescribed passing locus. A rice grain position detector 24, a light source 8 and optical fibers 16, 17 connecting to photodetecting elements 18, 19, are provided in this locus. Light is projected directly to the rice grain passing through the locus. Then, body cracked grains are detected by the variation of photodetecting quantity of bright and dark parts of transmitting light by the elements 18, 19. The detection of the body cracked grains are always performed with high accuracy and high efficiency without being affected by the contamination of a light transmitting window by said direct light projection not passing through the light transmitting window etc.

Description

[Detailed description of the invention] The present invention relates to an apparatus for detecting split rice grains.

With the recent mechanization of rice cultivation, dryers are also used to dry the paddy after harvesting.Dryers are not affected by the weather and can be used to dry efficiently under constant conditions, but the temperature of the paddy When the drying loss rate increases, split grains will occur frequently. In addition, in the conventional split grain detection device, a slit or a light-transmitting window made of a transparent material is provided on the bottom wall of the sorting gutter body, and a photoelectric detection device consisting of a light source and a light receiving element is arranged above and below the window. As a result, the light-transmitting window may become clogged or contaminated by dust adhering to the rice grains, which may change the amount of light transmitted by the rice grains received by the light-receiving element, or may become stuck to the light-transmitting window. This method has the disadvantage that the rice grains come into contact with dust and disrupt the normal flow, often reducing the sorting accuracy and efficiency.

The present invention solves the drawbacks listed in 1 above, and aims to improve the I! A photoelectric detection device consisting of a light source and a light-receiving element is arranged in relation to the falling locus of the rice grains flowing down from the edge, and light is emitted onto the rice grains in the falling locus, and the bright and dark parts of the transmitted light are detected by the light-receiving element. By receiving light from the light source and detecting split grains based on changes in the amount of light received, the light source directly irradiates the rice grains flowing down the flow trajectory, and the transmitted light is received by the light receiving element. Therefore, it is an object of the present invention to develop and provide a device that prevents the disadvantages caused by the above-mentioned light-transmitting window and always detects split grains with high accuracy and high efficiency.

The present invention will be explained with reference to embodiment figures. Figures 1 and 2
In the figure, reference numeral 1 denotes a box-shaped machine frame, and inside the machine frame 1, there is a vibrating grain feed trough 3 provided with grain feed grooves 2 for vertically flowing paddy grains.
A horizontal downflow gutter 6 with installation grooves 4 is installed in series, and a photoelectric detection fixing plate 6 is fixed to the gutter end of the gutter 5, and photoelectric detection is mounted on the upper and lower parts of the fixing plate 605. A light source 8 and a light receiving device 9 of the device 17 are provided, and these 7 and 8 are respectively disposed opposite to the falling trajectory X of the rice grains flowing down from the end of the gutter of the downstream 41!5-. An ejector device 10 consisting of a device, an impact device, etc. is provided and disposed in relation to the falling trajectory light source 8
The bright and dark parts of the transmitted light are received by the light receiving device 9, and the split grains are detected based on the change in the amount of received light, and the ejector device 10 is actuated based on the detection signal to sort out the split grains. It is shaped like this.

Further, the vibrating grain feeding gutter 3 has a vibrating inclined grain feeding gutter 11 arranged horizontally in parallel on its side, and the inclined grain feeding gutter 11 has a supply hopper 12 at the upper part of its lower side receiving portion. At the same time, a guide wall 13 for guiding the paddy grains is erected on the gutter surface, and a drifter "] 14 provided at the beginning end of the grain feeding row t112,
A grain discharging port 15 provided on an example of a higher side of the inclined grain feeding trough 11
are integrally formed by interconnecting them.

Further, the light receiving device 9 has one end of two optical fibers 16 and 17 provided at a reference point Q near the particle detection position P of the falling trajectory X through an optical lens, respectively, and A pair of light receiving elements 18.19 is provided on the other end side, and each light receiving element 18.19 is connected to the control circuit 20 by a conductive wire, and the output side is connected to the ejector kn@
1o and a digital display 21 on the top of the machine frame 1, respectively. 22 is a grain collection tube for collecting grain-sized paddy without a body-splitting surface;
Reference numeral 3 designates a discharge port provided in the receiving channel for the split grains that have left the flow path X, and 24 represents a rice grain position detection sensor for detecting the rice grains that have reached the particle detection position P on the flow path X.

Next, the bright and dark parts of the rice grains in FIG. 3 will be explained. This figure shows the rice grains irradiated from below when the particle tip reaches the particle detection value 1llP, and in each figure B, b, and c, the central part of the central knitted dotted line (thick line) is the light source 8. The irradiation intensity Q for irradiating the rice grains, the oval closed curve (dotted line) represents the rice grain 25 inside the rice grain, and the knitted dotted line drawn inside the rice grain 25 (set 1 represents the crack surface R, respectively. At Z, A
and B are respective viewpoint positions where each fiber of each of the light receiving elements 18, 19 faces, and at this viewpoint position,
Both sides 26 of the rice grain image of the rice grain, which is formed by connecting the rice grain image irradiated with the transmitted light beam projected onto the rice grain from the light source 8 through an optical lens.
When the amounts of light A and 26B are received, the amount of light received (brightness) of each light receiving element 18 and 19 is equal, and the difference in light amount is within the standard light amount limit value (11! pressure), so this rice grain is cracked. It is identified as a regular particle with no faces. In the rice grain 25' shown in the figure, the crack surface R is located on the left side of the irradiation point Q. Therefore, the transmitted light inside the grain that enters from the irradiation point Q is scattered by the crack surface R, resulting in the amount of light on the left side of the grain. decreases and the light intensity difference falls outside the reference light intensity limit value, so this particle is identified as a crack grain.

The rice grain 25'' in Figure C produces a contrasting contrast to the rice grain 25', and the difference in light intensity is outside the reference light intensity limit value, so this particle is also identified as a crack particle.

Next, the control circuit 20 shown in FIG. 4 will be explained. A pair of light-receiving elements 18, 19 of the light-receiving device 9, which receive the respective transmitted light beams from both sides of the rice grain, are connected to the differential amplifier 30 of the split-grain detection circuit 29 via each amplifier 27, 28, and the output thereof is The side is connected via an analog switch 31 and a comparator 32 to the ejector device 10 and a counter 33 for shell-split grains, respectively, and 34 is a setting device for setting a reference light intensity limit value for the difference in light intensity between regular particles and shell-split grains. In addition, rice grain position detection sensor 2
4 is connected to a comparator 37 of a total grain number detection circuit 36 via an amplifier 35 and a total grain number counter 39 via an analog switch/sochi circuit 38, and the rice grain position detection sensor 24 When the rice grain passes through the irradiation point Q, when the tip of the rice grain reaches a predetermined particle detection position P, the center of the rice grain is formed to coincide with the center of the irradiation point Q. The counter 33 and the total number of grains counter 39 are both a digital display 21 that displays the side split ratio.
40 is a setting device that sets a reference light amount value for confirming that the tip of the rice grain has reached a predetermined position P.

With the above-mentioned configuration, the paddy grains flowing down from the supply hopper 12 to the vibrating inclined grain feeding trough 11 are sent to the higher side of the shelf surface by the vibration action of the grain feeding trough 11, and are sent through the grain threshing port 15 to the vibrating grain feeding trough 11. 41!3, and flows into the grooves 2 in a longitudinal manner due to the vibration action of the grain feeder 3,
In addition, the rice grains flow down the 50 grooves 4 of the downflow gutter in a rapid flow, flow down from the end of the gutter along the flow trajectory When reaching the position P, the rice grain position detection sensor 24 receives the transmitted light beam and inputs the received light signal to the comparator 37 via the amplifier 35, where it is compared with a reference light amount value set, The comparison signal is inputted to the analog switch circuit 38, and in the switch circuit 38, every time the signal is input, the switch No. 18 is activated to close the analog switch 31, and the signal is sent to the total grain counter 38. A manual input is made to the digital display 21 via the . On the other hand, the light receiving device 9 provided above the irradiation point Q
The differential amplifier 30 of the split-grain detection circuit 29 receives the respective light reception signals from both sides of the rice grain received by the pair of light receiving elements 18 and 19, and outputs the output from the analog switch 31.
At the moment when the fill is closed, the light is input to the comparator 32, and the comparator 32 compares it with the set reference light amount limit value to detect the shell-split grain, and sends the detection signal to the ejector equipment fill (
1 and the counter 33 for split grains, calculate the number of split grains at the counter 33, and display the number on the digital display 2.
1, the display 21 calculates and displays the side split ratio by comparing the detected total number of rice grains and the number of split grains, and the detection signal manually input to the ejector device 10 is displayed on the display 21.
The actuating part is actuated to inject the shell-split grains flowing down the flow trajectory The sized rice grains without a body-splitting surface flow down the flow path X and are taken out of the machine via the grain collector 1e122.

Claim 121 provides the light receiving device 9A.
However, since a single light-receiving element 41 receives changes in the amount of light transmitted through the entire rice grain, the photoelectric detection device is simplified, and the entire rice grain is scanned in a counting manner to detect the amount of light in each part. It has the effect of making it possible to distinguish between crushed grains, immature grains, and original grains other than shell-split grains, and improving the sorting performance.

As described above, the rice grain shell-split grain detection device of the present invention has a photoelectric detection device consisting of a light source and a light receiving device, and an ejector device that are arranged in relation to the falling locus of rice grains flowing down from the gutter end of the gutter. By setting the light beam to the rice grains in the flowing trajectory, the light and dark parts of the transmitted light are received by the light receiving element, and the split grains are detected based on the change in the amount of light received, so that the bottom surface of the flowing gutter can be detected. In conventional split grain detection devices equipped with a transparent window made of slits or transparent material, it is possible to completely prevent adverse effects such as changes in the amount of light received and disturbances in the flow of rice grains caused by clogging or contamination of the transparent window. In addition, the detection accuracy can be improved by directly irradiating or receiving changes in the amount of light transmitted through rice grains, and the automation of the detection of split grains can be completed to save labor in the detection work.
This method has the advantage of being able to detect split grains with high precision and efficiency, thereby promoting the mass production of high-quality refined rice grains.

[Brief explanation of the drawing]

The drawings are examples of the present invention. Fig. 1 is a side sectional view of this device, Fig. 2 is a plan view of its downflow gutter, Fig. 13 is an explanatory diagram of light and shade of rice grains, Fig. 4 is its control circuit diagram, and Fig. 5 is a diagram of another embodiment. FIG. 2 is a partially enlarged cross-sectional view. 1... Box-shaped machine frame 2... Grain feed groove 3... Vibrating grain feed gutter 4... Grain flow groove 5... Downflow gutter 6...
・Fixing plate for photoelectric detection 7...Photoelectric detection device 8...
Light source 9.9A... Light receiving device 10... Ejector device 11... Vibrating inclined grain feeding trough 12... Supply hopper 13... Guide wall 14... Inflow port 15... Grain discharging port 16 ...Optical fiber 17...
Optical fiber 18... Light receiving element 19.
... Light receiving element 20 ... Control circuit 21 ... Digital display 22 ... Grain collection tube 23 ... Discharge port 24.
・Rice grain position detection sensor 25.25', 25- ・
...Rice grains 28A, 26B...Rice grain side parts 27...Amplifier 2B...Amplifier 29...Detection circuit for split grains
3゜...Differential amplifier 31...Analog switch
32...Comparator 33...Counter for split grains 3
4... Setting device 35 River intensifier 36... Detection circuit for total grain number 37... Comparator 38... Analog switch circuit 39... Counter for total grain number 4o... Setting device 41 ... Light-receiving element P ... Particle detection position R ... Crack surface Q ... Irradiation point July 30, 1957 Commissioner of the Japan Patent Office Name: Kazuo Sugi 1, Indication of the case, Patent Application No. 036800, filed in 1982, 2, Title of the invention: Apparatus for detecting split grains in the shell of rice grains 3, Relationship with the person making the amendment Patent Applicant Address: 1-19-10-5 Ueno, Taito-ku, Tokyo, Specification Subject to Amendment 1-1 - Scope of Claims 1 Detailed Description of the Invention
Each column of [Brief Description of Drawings] and Figure 2 of the drawings. [i. Details of the amendment - 1. Title of the invention A photoelectric detection device consisting of a rice grain shell-split grain detection device 2 and a claimed light iA & is arranged in conjunction with each other, and a photoelectric detection device consisting of a light iA & This apparatus detects split grains of rice by emitting light, receiving bright and dark parts of the transmitted light by a light receiving element, and detecting split grains by detecting changes in the received light. (2) The rice grain shell-split grain detection device according to claim (1), wherein the metering light device receives optical changes in the light beam transmitted through the entire rice grain using one light-receiving element. . (3) The rice grain shell-split detection according to claim (1), wherein the light receiving device receives light changes of transmitted light beams at a plurality of locations on the rice grain using a plurality of light receiving elements, respectively. Device. Claims (1), (2), or (3), wherein the sensor for detecting the position of rice grains is connected to a control circuit formed to receive light in response to a signal that detects the position of the rice grains. The rice grain split grain detection device described above. (5) The light-receiving device is connected to a control circuit formed to display the barrel-split ratio.
) or (9) or (3). 3. Detailed Description of the Invention The present invention relates to a rice grain split grain detection device. For the recent mechanization of rice cultivation work. Accordingly, dryers are also used to dry paddy after harvesting, but dryers can dry efficiently under certain conditions without being affected by the weather, but when the temperature and drying rate of paddy increases, In addition, conventional split grain detection devices provide a light-transmitting window made of a slit or a transparent material on the bottom wall of the sorting gutter, and a window located above the window. Since a photoelectric detection device consisting of a light source and a light-receiving element is provided, the light-transmitting window may become clogged or contaminated by dust adhering to the falling rice grains in the gutter, and the amount of light transmitted through the rice grains received by the light-receiving element may change. In addition, the rice grains come into contact with the dust stuck to the transparent window and disturb the normal flow, resulting in a disadvantage that the sorting accuracy and sorting efficiency are often reduced. In order to solve the various drawbacks, a photoelectric detection device consisting of a light source and a light-receiving element is arranged in relation to the locus of passing rice grains, and light is emitted onto the rice grains on the said locus to detect the transmitted light beam. Light is received by a light-receiving element in bright and dark areas, and split grains are detected based on changes in the amount of received light, so that the rice grains flowing down the flow trajectory are directly irradiated and the transmitted light is received. It is an object of the present invention to develop and provide a high-performance device that prevents the harmful effects caused by the light-transmitting window and always detects split grains with high accuracy and high efficiency.The present invention will be explained with reference to embodiment figures. Figures 1 and 2
In the figure, reference numeral 1 denotes a box-shaped machine frame, and inside the machine frame 1, there is a vibrating grain feed trough 3 provided with grain feed grooves 2 for vertically flowing paddy grains.
A fixed plate 6 for photoelectric detection is fixed to the end of a grain row gutter 5 which is installed in a horizontal structure, and the paddy grains flow down in a line on the discharge side. A light source 8 and a light receiving device 9 of the detection device 7 are provided, and these 7 and 8 are arranged opposite to the trajectory X of the rice grains, and an ejector consisting of a blower device, an impact device, etc. is provided on one side of the fixed plate 6. A device 10 is provided and disposed in relation to the passing trajectory The light-receiving device 9 receives bright and dark portions of the transmitted light beam, detects split grains based on changes in the amount of received light, and operates the ejector device 10 based on the detection signal to sort out the split grains. It is. In addition, the vibrating grain feeder $13 has a vibrating inclined gutter 1 on its side.
1 are arranged in parallel in a horizontal structure, and the inclined gutter 11 is provided with a supply hopper 12 at the upper part of the lower side receiving part, and a guide 113 for guiding the paddy grains is erected on the line surface, and the above-mentioned feeding An inlet 14 provided at the beginning end of the grain groove 2 and the inclined gutter 11
The grain discharging ports 15 provided on one side of the opening are interconnected and integrally formed. In addition, the light receiving device 9 is arranged at an irradiation point Q in the vicinity of the particle detection position P, which is arranged opposite to the passage trajectory X by one side end of two optical fibers 16 and 17, respectively, through an optical lens.
and a pair of light receiving elements 18. at the other end.
Each of the light receiving elements 18 and 19 is connected to a control circuit 20 by a conductive wire, and its output side is connected to the ejector device 10 and a digital display 21 on the upper part of the machine frame 1, respectively. Reference numeral 22 denotes a grain collecting cylinder for collecting grain-sized paddy without a splitting surface, 23 indicates a discharge port provided in a receiving channel for splitting grains that have left the passing trajectory X by 1IiI, and 24 indicates a particle detection position 1f on the passing trajectory X.
This is a rice grain position detection sensor for detecting rice grains that have reached P. Next, the bright and dark parts of the rice grains in FIG. 3 will be explained. This figure shows the rice grains irradiated from below when the tip of the particle reaches the particle detection position 11P, and each of the figures a, b,
In c, the center of the central dotted line (thick line) is the light source 8.
Irradiation point Q1 elliptical closed curve (dotted line) that irradiates rice grains from
indicates the rice grain 25 inside the rice grain, and the concessional dotted line (thin line) drawn inside the rice grain 25 indicates the crack surface R, respectively. In addition, in FIG. When the amounts of light on both sides of the rice grains 26A and 26B of the rice grain image are received, the amounts of light received by each light receiving element 18 and 19 (brightness) are equal, and the difference in the amount of light is within the reference light amount limit value (voltage). Therefore, this rice grain is identified as a regular grain without crack surfaces. In the rice grain 25' shown in the figure, the crack surface R is located on the left side of the irradiation point Q. Therefore, the transmitted light inside the grain that enters from the irradiation point Q is scattered by the crack surface R, and the amount of light on the left side of the grain is decreases and the light intensity difference falls outside the reference light intensity limit value, so this particle is identified as a crack grain. As soon as the rice grain 25'' in Figure C crosses the light-dark expansion surface opposite to the rice grain 25', the light difference becomes outside the standard light intensity limit value, and this particle is also identified as a crack particle. The control circuit 20 shown in FIG.
is connected to the differential amplifier 30 of the shell split grain detection circuit 29, and its output side is connected to the zector device 10 and the shell split grain counter 33, respectively, via an analog switch contact 31 and a comparator 32. Ru. Reference numeral 34 denotes a setting device for setting a reference light amount limit value for the difference in light amount between regular grains and split grains. Further, the rice grain position detection sensor 24 is connected to a total grain number counter 39 via an amplifier 35, a comparator 37 of a total grain number detection circuit 36, and an analog switch 38. Note that the rice grain position detection sensor 24 detects when the rice grain passes through the irradiation point Q.
When the tip of the rice grain reaches a predetermined particle detection position P,
It is formed so that its center coincides with the center of the irradiation point Q. The barrel 9 is also connected to a digital display 21 that displays the barrel side ratio, and 40 is a setting device that sets a reference light amount value for confirming that the tip of the rice grain has reached a predetermined position IP. . With the above-mentioned configuration, the rice grains flowing down from the supply hopper 12 to the vibrating inclined gutter 11 are sent to the linear side by the vibration action of the inclined gutter 11, and are sent from the grain threshing port 15 to the vibrating grain feeding gutter 3. As they flow into the grooves 2 of the grain feeder 613, the grains flow in a longitudinal arrangement in the grooves 2 due to the vibration of the grain feeder 613, and the paddy grains flow down the grooves 4 of the downflow trough 5 and flow therethrough. The rice grains flow down the passing trajectory X from the edge of the rice grain and pass through the particle detection position P. At this time, when the tip of the rice grain reaches a predetermined position P, the rice grain position detection sensor 24 receives the transmitted light beam and generates a light reception signal. is input to the comparator 37 via the amplifier 35, and compared with the reference light amount value set in the comparator 37, and the comparison signal is input to the analog switch 38. A switch signal is generated to close the contact 31 of the analog switch, and the signal is input to the digital display 21 via the total grain counter 39. On the other hand, a split-grain detection circuit 2 receives light reception signals from both sides of the rice grain received by a pair of light receiving elements 18 and 19 provided above the irradiation point Q.
The differential amplifier 30 of No. 9 inputs its output to the comparator 32 at the moment when the contact 31 of the analog switch is closed, and the comparator 32r detects split grain by comparing it with a set reference light amount limit value. At the same time, the detection signal is inputted to the ejector device 10 and the shell split grain counter 33, and the shell split grain counter 33 counts the number of shell split grains and displays it on the digital display 21. The total number of rice grains detected and the number of split grains are calculated and displayed.
Furthermore, the detection signal input to the ejector device 10 is
10 actuating parts are actuated to inject the shell split grains that pass through the passing trajectory The grain-sized paddy that is not used passes through the passage path X and is taken out of the machine via the grain collection cylinder 22. Particularly iFF Claim No. (Z) refers to the light receiving device 9.
Since A detects the maximum change in the light beam transmitted through the entire rice grain using one photodetector element j41, the photoelectric detection device is simplified, and the entire rice grain is scanned in a counting manner to determine the priority change in each part. It is possible to detect crushed grains other than shell-split grains, immature grains, original grains, etc. by detecting each of them, and has the effect of improving the sorting performance. As described above, the rice grain shell-split grain detection device of the present invention has a photoelectric detection device consisting of a light source and a light receiving device, and an ejector device, which are arranged in relation to the locus of passing rice grains. Light is projected onto the rice grains in the trajectory, and the bright and dark parts of the transmitted light are received by a light receiving element, and split grains are detected based on changes in the amount of light received, so the bottom of the gutter is made of slits or transparent material. In conventional cracked grain detection devices equipped with a transparent window, the problems such as changes in the light receiving trowel caused by clogging of the transparent window or iodization, and disturbances in the flow of rice grains due to dust stuck to the transparent window can be completely eliminated. In addition, since it directly receives the optical changes in the light beam transmitted through the rice grains, the detection accuracy can be greatly improved, and the automatic detection of split grains has been completed, as well as labor-saving in the detection work. This method has the advantage of being able to consistently detect split grains with high accuracy and high efficiency, thereby achieving mass production of high-quality refined rice grains. 4. Brief description of the drawings The drawings are examples of the present invention. Fig. 1 is a side sectional view of this device, Fig. 2 is a plan view of its downflow gutter, Fig. 3 is an explanatory diagram of the bright and dark shapes of rice grains, Fig. 4 is its Ii control circuit diagram, and Fig. 5 is a separate implementation. It is a partially enlarged sectional view of an example figure. 1...Box-shaped machine frame 2...Grain feeding groove 3...
・Vibrating grain feeder 4...Grain flow groove 5...Draining gutter 6...Fixing plate for photoelectric detection 7...Photoelectric detection device 8...Light source 9.9A...Light receiving device
10...: l Zecta device 13...Guidance W!
14... Inflow port 15... Grain removal port 16...
Optical fiber 17... Optical fiber 18... Light receiving element 19... Light receiving element
20... Control circuit 21... Digital display 22.
...Grain collecting cylinder 23'...Discharge port 24...Rice grain position detection sensor 25, 25', 25"...Rice grains 26A, 26B...Rice grain side part 27...Amplifier 28... Amplifier 29...
・Detection circuit for shell split grain 30...Differential amplifier 31...
・Analog switch contact 32... Comparator 33... Counter for split grain 34... Setting device 35... Amplifier 36.
...Total grain number detection circuit 37...Comparator 38...
・Analog switch 39... Counter for total grain number 40... Setting device 4
1... Light receiving element P... Particle detection position R...
・Crack surface Q...Irradiation point X...Flowing trajectory

Claims (1)

[Claims] (1) A photoelectric detection device consisting of a light source and a light receiving device is arranged in relation to the trajectory of the rice grains flowing down from one end of the gutter, and This rice grain split grain detection device is configured to emit light, receive the bright and dark parts of the transmitted light beam by a light receiving element, and detect split grains based on changes in the amount of received light. (21. The rice grain split grain detection device according to claim 11, wherein the light receiving device receives changes in the amount of light transmitted through the entire rice grain using one light receiving element. I. The light receiving device The rice grain shell-split grain detection device according to claim (1), wherein a plurality of light-receiving elements respectively receive changes in the amount of transmitted light at a plurality of locations on the rice grain. Claim T11 or Claim 1, wherein the device is connected to a control circuit formed such that a sensor for detecting the rice grain α position provided opposite to the falling locus receives light in response to a signal that detects the position of the rice grain. (Claim 2 or (3: 1) The rice grain shell-split detection device according to item 1. No. (11)
The apparatus for detecting split grains of rice grains according to item (2) or item (8).