JPS6324255B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to improvements in grain moisture measuring devices.

Conventional technology Grain supplied to a grain tank such as a grain dryer is
Since a large amount of moisture content such as branch grains, immature grains, straw waste, dust, etc. and foreign matter from hybrids that change shape are mixed in, methods that directly collect and measure the moisture content of rice grains in the tank do not allow for the measured moisture value. is uncertain, and practical application has not been fully achieved. Furthermore, even if a moisture measuring device is equipped with an air selection process and has an integrated structure, the structure of the device becomes smaller and it is difficult to completely separate and sort contaminants. It has the disadvantage of causing density unevenness on the grains.

Furthermore, in a measuring device that displays density-corrected measured moisture values, the moisture values displayed for grain densities below the reference grain density have a large error and have the disadvantage of causing erroneous judgments.

In addition, a cylindrical measurement chamber with an open top and bottom is formed inside the particle storage chamber, and the measuring tube of the weighing scale and the electrode plate of the moisture content meter are placed vertically in the chamber, and the inner diameter of the center part is larger than that of the upper and lower openings. A device for measuring the moisture content of grains has been proposed in Japanese Patent Laid-Open No. 55-23458.
With this method, density and moisture measurements are performed while the grain is flowing and are measured at locations separated from each other, so measurement errors are likely to occur. For grain densities below the reference grain density, calculation accuracy decreases, resulting in a misunderstanding of accurate measured moisture values.

Problems to be Solved by the Invention The present invention has been made in view of the above problems and in order to solve the problems. A sensor for measuring moisture content is integrally provided inside the container to eliminate the time difference in measuring the density and moisture content of the grain, and to measure the predetermined grain density and simultaneously measure the moisture content of the grain. By installing a display value changing device in the control electric circuit, only measured moisture values that are equal to or higher than the lower limit of standard grain density are displayed, and highly accurate real moisture values can be clearly and automatically indicated. The purpose of the present invention is to develop and provide an apparatus that can greatly improve its measurement function and mass-produce high-quality tempered grain reliably and smoothly.

Means for Solving the Problems In order to achieve this object, the grain moisture measuring device of the present invention includes a moisture measuring sensor provided inside a density measuring container for measuring grain density, and a sensor related to the measuring container. A lower limit value detection device for detecting the lower limit value of the reference grain density is provided in the density measurement electric circuit connected to the sensor, and a display device equipped with a display value changing device is provided in the moisture measurement electric circuit connected to the sensor. , the changing device and the detecting device are electrically connected so as to display only the measured moisture value of the grain density that is equal to or higher than the lower limit value.

Example Hereinafter, the present invention will be explained with reference to embodiment figures.

Grain feeding port 2 on one side of the top, and grain discharging port 3 on the bottom
A machine frame 1 with A ventilation window 7 is installed in the frame wall near the fixed plate 4, and a ventilation window 8 is installed in the frame wall on the opposite side.
are provided respectively, and a sorting air passage 13A is formed between them, and a chevron-shaped grain flow plate 9 is installed at the lower part of the end of the conveying gutter 6 in the air passage, and a cyclone is installed outside the machine frame 1 of the air intake window 8. A blower 11 equipped with 10 is installed,
The air exhaust fan 11 and the air intake window 8 are connected through an air intake path 12 to form an air selection device 13, and the grain flow board 9
A container 14 for density measurement is mounted below the inner wall surface 9A, and an immature grain discharge passage 15 is formed below the outer wall surface 9B. Sensor 17 on the wall
and also fix the density measurement container 14 on the fixing plate 4.
The weighing device 18 is connected to a weighing device 18 provided at the bottom of the fixed frame 2 with a hanging rod portion 19 projecting upward.
0 and a movable frame 22 with a horizontal rod 21 protruding laterally, and each frame 20, 22 is connected to a connecting rod 23, 23.
The movable frame 22 is connected to each other so that it can move up and down freely, and the hanging rod part 19 and the horizontal rod 21 are connected by a spring scale 26 equipped with a spring 24, a weighing detection part 25, etc. Furthermore, the discharge valve 16 of the container 14 is connected to an opening/closing actuator 27 to be opened and closed.

Next, the electric circuit 28 of FIG. 2 will be explained. The moisture electric circuit for measuring grain moisture is sensor 17.
The output end of the circuit 29 is connected to a shift circuit 29, and the input side of the circuit 29 is connected to a setting circuit 30 that can adjust the shift value depending on the grain type. Further, the output side of the correction circuit 31 is connected to a display 35 via a display value changing contact 33 provided in a changing device 32, and 34 is a display changing device;
The output indicates a measured value that is less than the lower limit value. The density electric circuit for measuring grain density also connects the output end of the weighing device 18, which is connected to the density measuring container 14, to the shift circuit 36;
This circuit is connected to a setting circuit 37 that can adjust the shift value depending on the grain type, and its output side is branched into two conductors, one of which is connected to the correction circuit 3.
1, and the other end is connected to a lower limit value detection device 38, which is provided with a comparator 39, and the other conductor wire and the conductor wire from the setting device 40 are connected to the input side of the comparator 39. At the same time, the output side of the switching device 39 is connected to a relay 41, and the contact 33 of the changing device 32 is configured to switch when the relay 41 is energized or demagnetized.

In the above configuration, the sample grains (husks) supplied from the grain tank to the grain transport gutter 6 flow down from the gutter end of the grain transport gutter 6 into the density measurement container 14 due to the vibration action of the vibration device. , in the sorting air path 13A,
As the exhaust fan 11 rotates, air outside the machine flows in through the air supply window 7 and flows out into the air intake window 8. The rice grains fall onto the inner wall surface 9A of the mountain-shaped drifting grain board 9, glide down the board surface and flow into the container 14 for density measurement, and the immature grains and husk grains fall onto the outer wall surface 9B of the drifting grain board. It slides on the plate surface and flows down into the immature grain discharge path 15. In addition, dust, straw, etc. are collected in the suction window 8 and are removed to the cyclone 10 through the exhaust fan 11, but as mentioned above, the sorting and separation of impurities is incomplete and the density measurement container 14 Density unevenness occurs in the grains within the grain, and particularly large density unevenness occurs in the case of a moisture measuring device that is not equipped with a wind selection device. The electric circuit of the present invention (FIG. 2) includes the sensor 17
measures the capacitance of the grains in the container 14 and inputs the signal to the shift circuit 29, and in the circuit 29, the signal is sent to the setting circuit 3 which adjusts it according to the grain type.
0 is shifted by the output from the correction circuit 31.
The signal is density-corrected in the circuit 31 by the input from the shift circuit 36 provided in another density electric circuit, and the corrected signal is sent to the display 35 via the change device 32. The actual moisture value is input and displayed, but if the grain density in the container 14 is less than the arbitrary lower limit of the reference density, the grain density measurement signal output from the end of the weighing device 18 is transmitted via the shift circuit 36. In the process of inputting the lower limit value to the lower limit value detection device 38, the comparator 39 inputs the output of the setting device 40, which has set the lower limit value, and the shift circuit 36.
The relay 41 is excited by emitting the comparison signal, so that the switching contact 33 provided in the changing device 32 switches and connects to the display changing device 34 due to the excitation effect. , the output from the changer 34 causes the display 35 to display an indication (for example, an error indication) that the displayed value is less than the lower limit value.

Effects of the Invention According to the grain moisture measuring device of the present invention, grain density and grain moisture can be measured simultaneously by integrally providing the density measuring device and the moisture measuring sensor in the density measuring container. In addition to obtaining highly accurate measurement values, only the actual moisture values (density-corrected measured moisture values) that are higher than the lower limit of the standard grain density are displayed easily and automatically, greatly increasing measurement efficiency. This method has the practical effect of improving quality, eliminating harmful effects caused by misidentification, and ensuring smooth mass production of various tempered grains of high quality at all times.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of the device, and FIG. 2 is its electrical circuit diagram. 1... Machine frame, 2... Grain feeding port, 3... Grain discharging port, 4
... Fixed plate, 5 ... Vibration device, 6 ... Grain conveyance gutter, 7 ... Air supply window, 8 ... Air intake window, 9 ... Grain flow board, 9A ... Inner wall surface, 9B ... Outer wall surface, 10
... Cyclone, 11 ... Exhaust fan, 12 ... Air suction path, 13 ... Air selection device, 13A ... Sorting air path, 1
4... Container for density measurement, 15... Discharge channel for immature grains, 16... Discharge valve, 17... Sensor, 18...
... Weighing device, 19 ... Hanging rod part, 20 ... Fixed frame,
21... Horizontal rod, 22... Moving frame, 23... Continuous rod,
24... Spring, 25... Weighing detection section, 26... Spring balance, 27... Opening/closing actuator, 28... Electric circuit, 29... Shift circuit, 30... Setting circuit, 3
DESCRIPTION OF SYMBOLS 1... Correction circuit, 32... Changing device, 33... Changing contact, 34... Display changer, 35... Display device, 36... Shift circuit, 37... Setting circuit, 3
8... Lower limit value detection device, 39... Comparator, 40...
...Setting device, 41...Relay.

Claims (1)

[Claims] 1. A moisture measuring sensor is provided inside a density measuring container for measuring grain density, and a lower limit value of a reference grain density is detected in a density measuring electric circuit connected to the measuring container. In addition to providing a lower limit value detection device for detecting the lower limit value, a display device equipped with a display value changing device is provided in the moisture measuring electric circuit connected to the sensor, so that only measured moisture values for grain densities that are equal to or higher than the lower limit value are displayed. A grain moisture measuring device in which the changing device and the detecting device are electrically connected. 2. The grain moisture measuring device according to claim 1, wherein the lower limit value detection device has a relay, and the change device is provided with a change contact of the relay and is operated to switch.