JPH049584B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a pair of unrollers that separate rice into paddy, brown rice, and rice husks, and an unloading mechanism that controls unloading between the rolls, and takes out a mixed rice of brown rice and paddy. Regarding the rice huller, a photoconductive grain sensor is arranged in the lower layer of the mixed rice flowing down in a row, and the passage time and light amount voltage of a single grain are simultaneously detected through the sensor, and the time and This system identifies and counts brown rice and paddy based on voltage, and can accurately identify brown rice and paddy through the sensor by simultaneously measuring time signals and voltage signals, and can detect deformed grains as well as the sensor. It is possible to ignore the detection signals of grains, etc. passing through the close and separated positions, and it is possible to properly distinguish between brown rice and paddy by simultaneously detecting the difference in grain length and the difference in reflected light intensity, and safely calculate the removal rate. It is an object of the present invention to provide a device for measuring the shedding rate of a rice huller.

An embodiment of the present invention will be described below in detail with reference to the drawings. Fig. 1 is an overall sectional view of the huller, and Fig. 2 is a sectional view of the same part. 3 is a shutter that changes the amount of paddy being fed out by the roll 2; 4 is a screw that adjusts opening and closing of the shutter 3; 5 and 6 are disposed below the feeding roll 2 to release the paddy; A pair of de-rolls separates the rice into brown rice and rice husks, and 7 removes the pressure (load) from each roll 5 and 6 by bringing the variable-side de-rolling 5 supported via a link 8 into contact with and separating from the fixed-side de-rolling 6. 9 and 10 are drop chute provided below each of the rolls 5 and 6 to form a mixed rice flow outlet 11; 12 is a support shaft 13 on the inclined upper end side;
A grain flow plate is attached to the grain flow plate 12 so that the angle of grain flow can be freely changed, and 14 is a winch fan that sucks and discharges straw waste such as rice husks that fall from the flow outlet onto the grain flow plate 12 to the outside of the machine through a sorting air passage 15. , 16 is a mixed rice take-out hopper that feeds the mixed rice of brown rice and paddy falling from the grain board 12 to the grain lifting cylinder 17, and is configured to continuously take out the mixed rice through the grain board 12. It consists of

Further, in the figure, reference numeral 18 is a reflection plate that is a deceleration member that is disposed opposite to the lower end of the grain flow board 12 and brings the flowing mixed rice into contact with it, and reference numeral 19 is a sample extraction plate that is connected to the center of the lower end of the flow grain board 12. A chute 20 is a sample gutter 2 that receives the mixed rice flowing down the grain plate 12 and the upper surface of the chute 19 after contacting the reflecting plate 18.
1 is a photoconductive grain sensor that irradiates the mixed rice falling from the sample gutter 20 with detection light and receives the reflected light to detect the amount of reflected light from the mixed rice; This is a sample take-out hopper that feeds the mixed rice after detection to the fried grain barrel 17. As shown in FIG. The sensor 21 is attached to a support arm 24 that connects and fixes the sensor 21.

Further, as shown in FIGS. 4 to 7, the end surface of the sample gutter 20 is formed into a V shape, and the gutter 20
A small reduction gear part 20a with an inclination angle A is located on the upper end side of the inclination.
, a speed increasing part 2 with a large inclination angle B is placed on the lower end side of the inclination.
0b, and a convex curved part 20c connecting each part 20a, 20b in the middle thereof, and a V-shaped groove width l2 of the speed increasing part 20b compared to a V-shaped groove width l1 of the speed reducing part 20a. The grain interval H1 flowing down the speed reducing section 20a is larger than that of the speed increasing section 20.
b is configured so that the grain interval H2 flowing down becomes large.

The detection part 21a of the grain sensor 21 is located obliquely above the lower end of the sample gutter 20, and the difference in grain lengths D1 and D2 of the brown rice 25 and paddy 26 immediately after flowing out from the sample gutter 20 (D1:D2=
2:3) and the amount of reflected light from the unpolished rice 25 and paddy 26. As shown in FIG.
are the detection time T2 of brown rice 26 and the reflected light amount voltage V
2, and the detection time T1,
When T2 and the reflected light amount voltages V1 and V2 do not match those of the paddy 26 and brown rice 25, the grains are detected as deformed grains by the sensor 21.

FIG. 9 is a circuit diagram for controlling the evasion rate, and includes a brown rice time setting device 27 that adjusts the brown rice detection time T2 according to the grain length D1 of the brown rice 25, and a brown rice detection voltage V2 that adjusts the brown rice detection time T2 according to the amount of reflected light of the brown rice 25. A brown rice voltage setting device 28 to adjust, the grain sensor 21 and each setting device 2
Comparator 2 that compares the outputs of 7 and 28, respectively.
9 and 30, and a brown rice detector 31 that detects brown rice based on the outputs of the respective comparators 29 and 30, and is configured to detect brown rice discharged from the sample gutter 20.

Furthermore, the paddy detection time T is determined according to the grain length D2 of the paddy 26.
1, a paddy voltage setting device 33 that adjusts the paddy detection voltage V1 according to the amount of reflected light from the paddy 26, the grain sensor 21, and each setting device 3.
Comparator 3 that compares the outputs of 2 and 33, respectively.
4, 35, and a paddy detection circuit 36 that detects paddy based on the output of each comparator 34, 35,
It is configured to detect paddy discharged from the sample gutter 20.

Next, a sample time setting device 37 for adjusting the detection time of mixed rice and paddy by the grain sensor 21, counters 38 and 39 for counting brown rice and paddy within the mixed rice detection time of the setting device 37; A yield calculation circuit 40 that calculates a yield rate based on the brown rice number output and the paddy number output of each counter 38 and 39
and a light emitting diode type display 42 that displays the escape rate via a drive circuit 41 based on the escape rate output of the circuit 40, and displays the escape rate at regular intervals based on the setting device 37. It is composed of

Also, the derolling 5 by the air cylinder 7,
Evacuation rate setting device 43 for adjusting the depressurization reference value of No. 6
and each of the counters 38, 39 and their setting device 4.
3, and outputs depressurization rise and fall signals by comparing the outputs of the air cylinders 3 and 3. The system is configured to control the operation based on the following.

The present invention is constructed as described above, and the dried paddy flowing down from the supply hopper 1 is de-processed by the de-rolls 5 and 6, and at the same time
Straw waste such as rice husks falling onto the grain board 12 is sucked out of the machine by a winnowing fan 14, and the mixed rice of brown rice and paddy that falls from the flow outlet 11 onto the grain board 12 is taken out by a hopper 16 and The grain is transported out of the machine via the lifting tube 17, and the sample removal chute 19
The mixed rice that comes into contact with the reflector 18 from sample gutter 2
The mixed rice is received at the upper end of the gutter 20 and discharged from the lower end of the gutter 20 so as to have a grain interval H2, and the mixed rice is detected grain by grain by the grain sensor 21, and the sensor detects the mixed rice. Counters 38 and 39 count the number of grains of paddy and brown rice within a certain period of time based on times T1 and T2 and detection voltages V1 and V2, and display the number of grains of paddy and unpolished rice through a calculation circuit 40 and a display 42. At the same time, the electromagnetic solenoid 45 is actuated via the evasion rate adjustment circuit 44 to drive and control the air cylinder 7 to change the depressurization of the release rolls 5 and 6, thereby keeping the evasion rate approximately constant.

It should be noted that it is also possible to use a reversible electric motor (not shown) in place of the air cylinder 7, and to adjust the gap between the roll-off rolls 5 and 6 to keep the roll-off ratio substantially constant.

As is clear from the above embodiments, the present invention arranges a photoconductive grain sensor 21 in the lower layer of mixed rice flowing down in a row, and measures the passage time and light amount voltage of a single grain through the sensor 21. The sensor 21 simultaneously detects brown rice and paddy and identifies and counts brown rice and paddy based on their time and voltage.By simultaneously measuring the time signal and voltage signal, brown rice and paddy can be accurately identified via the sensor 21, and deformation is prevented. It is possible to ignore the detection signals of grains passing through positions close to and away from the sensor 21, and to properly distinguish between brown rice and paddy by simultaneously detecting the difference in grain length and the difference in amount of reflected light between the grains. It has remarkable effects such as being able to calculate the shedding rate safely and efficiently carrying out the hulling work.

[Brief explanation of drawings]

FIG. 1 is an overall sectional view showing an embodiment of the present invention;
Figure 2 is a partial sectional view, Figure 3 is a front view of main parts, and Figure 4 is a partial sectional view.
The figure is a plan view of the sample gutter, Figure 5 is a side view of the same cross section, Figures 6 and 7 are end views of the same cross section, Figure 8 is the output diagram of the grain sensor, and Figure 9 is the evasion rate control circuit. It is a diagram. 21... Grain sensor.

Claims (1)

[Claims] 1. A photoconductive grain sensor is placed in the lower layer of the mixed rice flowing down in a row, and the passage time and light amount voltage of a single grain are simultaneously detected through the sensor, and based on the time and voltage. A dehulling rate measuring device for a huller, characterized in that it is configured to distinguish and count brown rice and paddy.