JPS6318700B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a rice moisture measuring device.

Conventionally, there are various moisture measuring devices that measure the moisture content of grains by measuring their capacitance. The capacitance method, which detects capacitance, is said to have a limit in terms of the accuracy of moisture measurement values. However, since the density of the grain distribution is not constant just by keeping the weight of the sample constant, a fairly large error occurs in this moisture measurement value, and this method cannot be used as a precise moisture measurement device.
Measuring the moisture content of grains (hulls) in the grain tank of a dryer, etc., which contains impurities with various moisture contents and shapes, such as branches and straw waste, is difficult because there are no voids in the formed grain layer. Since density unevenness occurs due to bridging, the measurement becomes even more uncertain, and practical application is not completely achieved.

The present invention was devised and developed in order to measure the moisture content of compressed grains using a moisture sensor attached to the capacitance of the grains at the appropriate location, and to measure highly accurate moisture values with little error. The purpose of this is to press and compress the grains supplied to the measuring container to a predetermined pressure by lowering a sliding tube that is reciprocally provided within the moisture measuring machine frame. By compressing samples that have a lot of metamorphosis in their morphology or epidermis, such as grains, or grains that are contaminated with various impurities such as impurities, immature grains, and crushed grains, the grain density can be stably rectified and accurate with no errors. The object of the present invention is to provide a device that can perform accurate moisture measurement.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a hollow cylindrical moisture measuring machine frame, and a sliding tube 7 is fitted into the upper half of the machine frame 1 so as to be able to reciprocate up and down. Tube 7
A screw shaft 6 serving as a rotating shaft is screwed onto a support rod 4 fixed to the support rod 4, one end of the screw shaft 6 is connected to a torque motor 5 that rotates in forward and reverse directions, and a presser 3 is attached to the lower end of the sliding tube 7.
is fixedly installed, and a moisture sensor 2 is attached to the plate surface of the presser 3. The lower half of the inside of the moisture measuring machine frame 1 is formed into a measuring container 10, and an opening/closing plate 9 is pivotally supported on one side of the lower end of the measuring container 10 so as to be freely openable and closable, and one side is attached to the moisture measuring machine frame. The other side of the closing spring 25 fixed to the outer side of the moisture measuring device frame 1 is attached to the opening/closing plate 9, and the opening/closing device 8 equipped with a solenoid is attached to the outer wall of the lower end of the moisture measuring machine frame 1 to open the opening/closing plate 9. The end portion is formed to be lockable or openable.

A grain supply port 17 is opened in the side wall of the moisture measuring machine frame 1 and communicates with the upper end of the measuring container 10, and overflow ports 14 and 15 are used to discharge excess grains into the measuring container 10.
A leveling device 11 equipped with a leveler 13 for leveling and straightening the grains is provided in relation to the overflow ports 14 and 15. It is connected to a motor 12 for reverse rotation.
Switch 2 installed on the upper wall inside the moisture measuring machine frame 1
4 and a metering switch provided on the top of the measurement container 10 are connected to a torque motor 5, and the moisture sensor 2 is connected to a display 23.

A moisture measuring machine frame 1 is installed on the wall of a grain tank 18 such as a dryer, and a grain feeding port 1 is opened in the wall of the grain tank 18.
9 and the grain supply port 17 are connected via a grain feeding path 20 inclined to the angle of repose of the grains, and a grain discharging tube is installed at the bottom side of the moisture measuring machine frame 1 provided with overflow ports 14 and 15. 16 is installed, and the flow path 21 of the grain threshing pipe 16 transports grains into the grain tank 1.
8 (not shown).

The operation of the above configuration will be explained below. The grains in the grain tank 18 naturally flow down the grain feeding path 20 from the grain feeding port 19 toward the grain feeding port 17 at an angle of repose, and the grains are fed into the measuring container 10. When the metering switch 22 detects a predetermined amount of grains, the signal from the metering switch 22 causes the torque motor 5 to operate in forward rotation to gradually slide the sliding tube 7 downward, and the forward and reverse rotation motor 12 is activated to move the leveler 13 of the leveling device 11 from side to side, and remove excess grains from the overflow ports 14 and 15 into the grain dumping tube 1.
When the sliding tube 7 compresses the grains filled in the measurement container 10 to an arbitrary predetermined pressure with the presser 3, the pressure is increased. The moisture sensor 2 on the third sub-board measures the capacitance of the compressed grain density, and the measured value is displayed on the display 23. In addition, the torque motor 5 rotates in the reverse direction several seconds after stopping in the measurement container 10 at a predetermined pressure value, and the torque motor 5 rotates in the reverse direction after a few seconds, and receives a signal when the sliding tube 7 contacts the stop switch 24 by sliding upward. The solenoid of the opening/closing device 8 is activated by the signal from the stop switch 24 to open the opening/closing plate 9, and the grains flow out from the measurement container 10 into the grain dumping cylinder 16, and the grains are shredded. Once this is completed, the opening/closing plate 9 is returned to the closed state by the closing spring 25, and thereafter the moisture measuring action is carried out continuously or intermittently.

What is shown in FIG. 3 is another embodiment in which a moisture sensor 2A is attached to the inner surface of the opening/closing plate 9. In contrast to the structure of the above embodiment, this other embodiment has the following points: the leveling device 11 equipped with the leveler 13, the motor 12 for forward and reverse rotation are not provided, and the moisture sensor 2A is not provided.
The configuration is the same except for the difference in the mounting location.
Further, since the action of moisture measurement is similar, the details thereof will be omitted.

The one shown in FIG. 4 shows yet another embodiment, and this one is different from the other embodiment described above in that a moisture sensor 2B is attached to the inner wall surface of the measuring container 10. Otherwise, the structure and operation are the same as in the previous embodiment, so the details will be omitted.

In any of the embodiments, it is of course possible to change the presser to a pressing means such as a weight or a lever that receives an arbitrary predetermined compression action without using a torque motor. .

As explained above, according to the present invention, a sliding tube is provided in the upper half of the moisture measuring machine frame so as to be able to slide back and forth, and an opening/closing plate is provided in the lower half of the moisture measuring machine frame. It is characterized by being formed into a measuring container, so that the grains supplied to the measuring container are compressed by a sliding cylinder that is moved downward by a motor, and the inter-grain density containing various impurities can be stably reduced. This method has the remarkable effect of being able to perform accurate moisture measurements without errors, since the moisture sensor installed at the appropriate location in contact with the grains detects the moisture value.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, with FIG. 1 being a side sectional view of the device, FIG. 2 being a plan view of the presser, and FIG.
The figure is a side sectional view of another embodiment, and FIG. 4 is a side sectional view of a main part of still another embodiment. 1... Moisture measuring machine frame, 2... Moisture sensor,
3...Press element, 4...Support rod, 5...Torque motor, 6...Screw shaft, 7...Sliding tube, 8...Opening/closing device, 9...Opening/closing plate, 10...Measuring container, 11
... Leveling device, 12 ... Motor for forward and reverse rotation, 1
3... Average child, 14... Overflow port, 15... Overflow port, 16... Grain removal cylinder, 17... Grain supply port, 18
...Grain tank, 19...Grain feeding port, 20...Grain feeding route, 2
1... Discharge path, 22... Metering switch, 23...
...Display device, 24...Stop switch, 25...Closing spring, 2A, 2B...Moisture sensor.

Claims (1)

[Scope of Claims] 1. A sliding tube equipped with a rotating shaft with one end pivoted to a motor is fitted into the upper half of a hollow cylindrical moisture measuring device frame so as to be able to slide back and forth, and the moisture measuring device The lower half of the inside of the instrument frame is formed into a measuring container, and an opening/closing device for locking or opening an opening/closing plate that is pivotally supported on one side of the lower end of the measuring container and can be opened and closed is provided in the moisture measuring device. attached to the side wall of the lower end of the frame, and a grain supply port is opened in the side wall of the machine frame to communicate with the upper end of the measuring container;
Further, the measurement container is provided with an overflow port for discharging excess grains, and a moisture sensor is provided to measure the capacitance of the grains by contacting the grains compressed at a predetermined pressure.
A paddy moisture measuring device, characterized in that it is mounted on the plate surface of the presser of the grain compression action portion of the sliding tube or at an appropriate position on the measuring container. 2. The rice moisture measuring device according to claim 1, wherein the moisture sensor is attached to the inner surface of an opening/closing plate provided at the bottom of the measuring container. 3. The rice moisture measuring device according to claim 1, wherein the moisture sensor is attached to the inner wall surface of the measuring container. 4. The rice moisture measuring device according to claim 1, further comprising a leveling device for leveling and rectifying the grains in the measuring container in association with the overflow port.