JPH0136056B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to an improvement of a shell crack grain detection device.

Conventional Technology With the recent mechanization of rice cultivation, dryers are used to dry paddy after harvest, which is efficient and unaffected by the weather. Mechanical drying using hot air can be carried out efficiently under certain conditions, but when the temperature and drying rate of paddy increases, split grains (crack particles) often occur. also occurs.

In the past, detection of cracked rice grains depended on the human eye.

In addition, a supply plate that vibrates with a vibrator is installed below the hopper discharge port, and an alignment plate that vibrates with another vibrator is installed below the discharge of the supply plate, and only this alignment plate has a width slightly wider than the thickness of the tablet. A tablet transfer device in which a groove having a depth close to the diameter is formed has been proposed in Japanese Patent Laid-Open No. 148557/1983.

Problems to be Solved by the Invention The present invention provides a pair of vibrating grain feeding plates that can each adjust the frequency or voltage to a desired state, making the grain feeding action of the sample accurate and smooth, and greatly improving detection accuracy. The light beam transmitted through the rice grain, irradiated from the light source through the transparent window, is refracted and scattered at the split surface, and changes in the amount of light in the front and back portions of the surface are detected by multiple light-receiving elements, respectively. It is an object of the present invention to provide a cracked grain detection device that accurately detects the brightness/darkness state of each rice grain by comparing the detection values of each light-receiving element and detects split grains.

Means for Solving the Problems The shell-cracked grain detection device of the present invention includes a pair of vibrating grain feeding plates provided in the same row with rice feeding grooves that flow the rice grains in a longitudinal manner, and at the same time, Each of the vibrating grain feeding plates is equipped with a vibrating device, and the vibration action of the vibrating grain conveys the rice grains supplied to the rear rice feeding groove so that they pass through a transparent window provided in the front rice feeding groove. and a light source and a light receiving device are arranged above and below the light-transmitting window so as to be substantially opposite to each other, so that crack particles are detected by the transmitted light beam of the rice grains passing through the light-transmitting window,
The light-receiving device has a configuration characterized in that it has light-receiving elements on both front and rear sides of the light-transmitting window.

Embodiments The present invention will be described with reference to embodiment figures. In Figures 1 and 2, the reference numeral 1 in the figures is a box-shaped machine frame;
Inside the machine frame 1, a pair of rear vibrating grain feeding plates 4 and a front vibrating grain feeding plate 4 are provided in the same row with rear rice feeding grooves 2 and front rice feeding grooves 3 that flow rice grains in a longitudinal manner. Grain plate 5
are arranged in the front and rear positions, and the rear rice feeding rows are moved by the respective vibration effects of the rear vibrating device 6 and the front vibrating device 7 provided on the rear vibrating grain feeding plate 4 and the front vibrating grain feeding plate 5, respectively. The rice grains supplied to the groove 2 are conveyed so as to pass through a transparent window 8 provided in the front rice feeding groove 3, and the rear vibrating grain feeding plate 4 has a A rice discharging port 11 of a supply hopper 10 is provided in the rice receiving gutter 9 at one end, and a gutter-shaped discharge port is provided at the other end of the front vibrating grain feeding plate 5. Exit portions 12 are provided and fixed to the walls of the machine frame 1, and a light source 13 and a light receiving device 14 are disposed above and below the transparent window 8 in a substantially opposing manner, and the light receiving device 14 is configured. A plurality of light-receiving elements 15 are provided on both front and rear sides of the light-transmitting window 8.
The electric circuits 16A and 16B of A and 15B are connected in relation to and electrically to a shell-split grain detector 17 provided on the upper part of the machine frame 1, and the electric circuits 16A and 16B of the grains A and 15B are connected electrically to the split grain detector 17 provided on the upper part of the machine frame 1. and is configured to detect crack particles. Note that the above-mentioned substantially opposing state means that the relative positions of the light source and the light receiving element form various angles such as an inclined line, a curved line, or a shortest line.

Therefore, when the sample unhulled rice is put into the supply hopper 10 and the cracked grain detection device is started, the unhulled rice that has flowed down from the supply hopper 10 to the rice receiving trough part 9 of the rear vibrating grain feeding plate 4 is caused by the vibration action. The grains are arranged longitudinally in the rear rice feeding grooves 2 and move forward, and move to the front rice feeding grooves 2 of the front vibrating grain feeding plate 5 and pass through the slit-like transparent grooves provided in the grooves 2. The unhulled rice that has passed through each of the light windows 8 and is located in the light-transmitting window 8 is irradiated upward through the slit by the light source 13 at the bottom, and the transmitted light of the particles is transmitted to the light receiving device 14.
The light is received by a plurality of light receiving elements 15A and 15B provided respectively, and the split grains are detected based on the intensity and intensity of the light.

According to claim 3, the two vibrating grain feeding plates 4, 5 adjust the frequency or voltage of each of the vibrating devices 6, 7 to adjust the flow rate of the rice grains for each grain feeding plate. With the variable configuration, the voltage of the vibrator of the rear vibrating grain feeding plate 4 is lowered to ensure that the rice grains are arranged longitudinally in the rice feeding grooves 2, and the voltage of the vibrating device of the front vibrating grain feeding plate 5 is lowered. It is possible to maintain an appropriate arrangement interval of rice grains in the rice feeding groove 2 by increasing the flow rate, making the grain feeding action of the sample accurate and smooth, greatly improving detection accuracy, and changing the flow rate of rice grains. This has the effect of increasing work efficiency.

Next, the light reception and detection function of the light beam transmitted through the unhulled rice will be explained with reference to an example diagram.

FIG. 3 shows rice grains located above the light projection window 8 and irradiated from below. The circular closed curve (dotted line) is rice grain 1 in unhulled rice.
8. Also, the vertical dotted line (thin line) drawn inside the rice grain 18
Each represents a crack surface P. Also, in figure a,
A and B are respective viewpoint positions where the light receiving elements 15A and 15B face each other, and in the case of a rice grain without a crack surface, the rice grain 1 receives light from this viewpoint position.
The light amount (brightness) of both polarized parts 19 and 20 of 8 is approximately equal,
The light amount difference falls within the reference limit value (voltage). Diagram b
In the rice grain 18', the crack surface P is on the left side of the transparent window 8, so the transmitted light inside the grain that enters through the transparent window 8 is scattered by the crack surface P, and the amount of light on the left side of the grain is reduced. decreases and the difference in light intensity falls outside the reference limit value, so this particle is identified as a crack grain. Diagram C
Since the rice grain 18'' produces a light and dark surface opposite to that of the rice grain 18', the difference in light amount is outside the reference limit value, so this grain is also identified as a crack grain.

As shown in FIG. 4, the split grain detector 17 includes a split grain detection circuit 21 that integrates each light reception signal from the light receiving elements 15A, 15B to detect split grains. A number detection circuit 22, a shell split grain counter circuit 24, and a grain number counter circuit 23 are provided, and a ratio digital display 25 is provided on the wall of the detector 17.

Each light receiving element 15A provided in the light receiving device 14,
15B is connected via amplifiers 26A and 26B to a detection circuit 21 for shell split grains and a detection circuit 22 for number of grains, and in the detection circuit 21 for shell split grains, the output side of each of the light receiving elements 15A and 15B is It is connected to an analog switch 28, an integration circuit 29 and a comparator 30 via an amplifier 27, and the output side of the detection circuit 21 is connected to a digital ratio display 25 via a counter circuit 23 for grain splitting. In addition, in the grain number detection circuit 22, each of the light receiving elements 15A, 15
The output side of B is connected to an OR circuit 33 via a comparator 31 or 32, and the output side of the detection circuit 22 is branched and one side is connected to an analog switch circuit 34, and the other side is connected to a particle number counter circuit. It is connected to the digital display 25 via 24.
Therefore, in the transparent window 8, the light receiving element 1 receives light and dark shadows of both polarized parts 19 and 20 of the rice grain 18.
The light intensity detection signals of 5A and 15B are amplified and input to the shell-split grain detection circuit 21, and the light intensity is detected by the differential amplifier 27 of the detection circuit 21, and the detection signal is sent to the analog switch 28. is input. On the other hand, the particle number detection circuit 2
2, the output from each light receiving element 15A, 15B is input to each comparator 31 or 32 and compared with the set reference light amount limit value (±voltage), and the comparison signal is input to an OR circuit 33 and ,
The particle confirmation signal from the OR circuit 33 is input to an analog switch circuit 34, and each time the signal is input, the switch circuit 34 issues a switch signal to switch the analog switch 28 of the shell split grain detection circuit 21. Thus, the differential amplifier 27
The output signal is input to the integrating circuit 29, integrated in the circuit, and input to the comparator 30. The comparator 30 compares it with a set reference light amount to detect the split grain, and also detects the detection signal. The grain number counter circuit 24 calculates the number of rice grains and transmits the result to the digital display 25, and the signal from the OR circuit 33 of the grain number detection circuit 22 is sent to the grain number counter circuit 24 to calculate the number of rice grains. The total number is calculated and transmitted on the digital display 25, and the grain ratio is calculated by comparing it with the number of shell split grains and displayed on the ratio digital display 25.

Effects of the Invention According to the present invention, each of the pair of vibrating grain feeding plates can adjust its frequency or voltage to a desired state, making the grain feeding action of the sample accurate and smooth, and greatly improving the detection accuracy. , the transmitted light of the rice grain irradiated from the light source through the transparent window is refracted and scattered at the split surface, and changes in the amount of light in the front and rear portions of the surface are detected by a plurality of light receiving elements, respectively;
By comparing the detected values of each light receiving element, the brightness and darkness of each rice grain can be precisely detected, and split grains can be detected.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of this device, FIG. 2 is a plan sectional view thereof, FIG. 3 is an explanatory diagram of the bright and dark shadows of rice grains, and FIG. 4 is an electric circuit diagram thereof. 1... Machine frame, 2... Rice feeding groove, 3... Rice feeding groove, 4... Vibrating grain feeding plate, 5... Vibrating grain feeding plate, 6
... Vibration device, 7 ... Vibration device, 8 ... Transparent window,
9... Rice receiving gutter section, 10... Supply hopper, 11...
...Discharge port, 12...Discharge port section, 13...Light source, 1
4... Light receiving device, 15A, 5B... Light receiving element, 1
6A, 16B... Electric circuit, 17... Body split grain detector, 18, 18', 18''... Rice grain, 19... Uneven part, 20... Uneven part, 21... Body split grain detection circuit,
22...Detection circuit for shell split grains, 23...Counter circuit for shell split grains, 24...Counter circuit for number of grains, 25
...Ratio digital display, 26A, 26B...
Amplifier, 27...Differential amplifier, 28...Analog switch, 29...Integrator circuit, 30...Comparator,
31... Comparator, 32... Comparator, 33... OR circuit, 34... Analog switch circuit.

Claims (1)

[Scope of Claims] 1. A pair of vibrating grain feeding plates provided with rice feeding grooves in the same row for flowing rice grains in a longitudinal manner are disposed in front and rear positions, and each of the vibrating grain feeding plates is equipped with a vibrating device. The rice grains supplied to the rear rice feeding groove are conveyed by the vibration action of the rice grains so as to pass through the transparent window provided in the front rice feeding groove, and the rice grains are placed at the upper and lower positions of the transparent window. A light source and a light receiving device are disposed substantially opposite each other so that crack particles are detected by the transmitted light beam of the rice grain passing through the light transmitting window, and the light receiving device has light receiving elements in both directions of the front and back of the light transmitting window. A shell crack grain detection device characterized by having each of them. 2. The vibrating grain feeding plate has a rice discharging port of the supply hopper provided at the rear end of the rear rice feeding groove, and a rice discharging port provided at the front end of the front rice feeding groove. The shell crack grain detection device according to claim 1, which is a device according to claim 1. 3. The method according to claim 1, wherein the pair of vibrating grain feeding plates is capable of changing the flow rate of rice grains for each grain feeding plate by adjusting the frequency or voltage of each vibrating device. Body crack grain detection device. 4. The cracked shell grain detection device according to claim 1, wherein the light receiving device is connected to a detection circuit that detects split grains by integrating the received light signal. 5. Claim 1 or 4, wherein the light receiving device has its detection circuit connected to a grain number counter circuit and a cracked grain counter circuit, respectively, and each counter circuit is connected to a digital display.
The shell crack grain detection device described in Section 1.