JPS6212284Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a grain moisture measuring device.

Conventional technology Conventionally, moisture measuring instruments that measure the moisture content of grains using capacitance have had problems in that the density of grains in the measurement chamber containing the anode varies significantly depending on the shape of the grains, the roughness of the grain surface, etc. Because of this, large errors occur in the measured moisture values, and furthermore, the mechanism of the measuring device becomes complicated, leading to frequent failures.

For example, Japanese Patent Application Laid-Open No. 55-31951 discloses an inflow device having a mechanism for adjusting the amount of paddy inflow from a circulating dryer, a device that measures a constant weight of paddy that has flowed in, and at the same time measures the moisture content of the paddy, A capacitive continuous type that is equipped with a discharge mechanism that discharges the paddy after measurement and a device that returns the discharged paddy to the dryer, and continuously measures the moisture content of the paddy by repeating the above series of operations. A paddy moisture content measuring device has been proposed, but since this device measures only the weight and moisture content, it has the disadvantage that the density of the incoming paddy varies depending on the shape of the paddy, resulting in errors in the moisture content. However, since weight measurement and moisture content measurement are performed at the same time, there is a drawback that the container may move or grains may be fed during moisture measurement, resulting in large measurement errors.

Problems to be solved by the invention The purpose of the invention is to eliminate the above-mentioned drawbacks, and corrects the moisture content based on the detected value of a capacitive sensor that detects the volume of grain for a constant weight.
It is an object of the present invention to provide a grain moisture measuring device that eliminates errors caused by grain density and also eliminates the need for feeding grains and moving containers when measuring moisture content, thereby eliminating measurement errors.

Means for Solving the Problems In the grain moisture measuring device of the present invention, a measuring machine frame having a supply port at the top and a discharge port at the bottom is attached to the side wall of the dryer body, and inside the machine frame: A moisture value measuring container comprising a grain feeding device on the upper part, a weighing device below the grain feeding device for weighing a certain weight of grain, and a capacity sensor and a moisture content sensor below the weighing device to measure the volume of the grain. is arranged, the grain feeding device is connected to the weighing device to stop feeding grain by a signal from the weighing device, and the capacitance sensor and the moisture content sensor The apparatus is characterized in that the display is communicated via a correction circuit to correct the detection signal from the moisture content sensor based on the signal.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a grain moisture measuring device according to the present invention is indicated generally by the number 10. The grain moisture measuring device 10 is attached to the side wall 1 of the main body of the dryer by a suitable device. Grain moisture measuring device 1
0 has a measuring machine frame 2 with a supply port 8 connected to the dryer in the upper part and a discharge port connected to the dryer in the lower part. Inside the machine frame 2, there is a supply port 8 at the top.
A grain feeding device 4 connected to the grain feeding device 4 and equipped with a vibrator 3, a weighing device 5 below the grain feeding device 4 for weighing a certain weight of grain, and a capacity below the weighing device 5 for measuring the volume of the certain weight of grain. A moisture value measuring container 11 having a sensor 6 and a moisture content sensor 7 for measuring the moisture content of the grain by capacitance is arranged.

To measure the moisture content of grains using the grain moisture measuring device 10, the grain feeding device 4 is activated by the vibrator 3, and the grains are fed from the dryer to the weighing device 5. At the same time when the weighing device 5 weighs a certain weight of grain, the vibrator 3 is activated by the signal.
is stopped, and the supply of grains to the weighing device 5 by the grain feeding device 4 is stopped. Next, the on-off valve 12 provided at the bottom of the weighing device 5 is opened, and the grains therein are sent into the container 11 for moisture value measurement. Therefore, the volume of the grain is measured by the capacitance sensor 6, and the moisture content of the grain is measured by the moisture content sensor 7. Thereafter, the on-off valve 13 provided at the bottom of the moisture value measurement container 11 is opened, and the grains therein are returned to the dryer through the discharge port 9.

An example of an electric circuit for density-correcting the moisture content value of grains measured by the moisture content sensor 7 is shown in the second embodiment.
As shown in the figure. Immediately after a certain weight of grain is measured by the weighing device 5, the grain feeding device 4 is stopped to stop the grain supply. Next, the on-off valve 12 is opened and the grains in the weighing device 5 are transferred to the moisture value measurement container 1.
The moisture content sensor 7 measures the moisture content of the grains in the moisture value measurement container 11, and the volume thereof is measured by the capacitance sensor 6. The output sides of the moisture content sensor 7 and the capacitance sensor 6 are respectively connected to the input side of a correction circuit 14, and the output side of the correction circuit 14 is connected to an indicator ₁₆ via an amplifier 15 and a relay contact R1.
is connected to. Therefore, the moisture content sensor 7
The detection signal from the capacitive sensor 6 is compared with the detection signal from the capacitive sensor 6 in a correction circuit 14, and appropriately corrected by addition or subtraction.The correction signal is amplified by an amplifier 15 and transmitted and displayed. When the grain feeding device 4 stops and the grain feeding operation is interrupted, the contact R ₁ closes and the correction circuit 14 and the display 16 become conductive, so that the moisture value measured by the moisture content sensor 7 is determined by the capacitance. The density is corrected according to the change in grain volume measured by the sensor 6, and the corrected and accurate moisture value is automatically displayed on the display 16. Adjust the drying condition of the grain by the dryer accordingly.

Effects of the invention According to the invention, in order to measure the volume and moisture content of a fixed weight of grains measured by a weighing device in a separate container for measuring moisture value,
During moisture measurement, the container is stable and there are few errors, allowing accurate moisture values for grains to be obtained.This moisture value is corrected by the volume relative to a constant weight, that is, the density value, so the shape of the grains, Measurement errors due to grain surface roughness, etc. are corrected and a moisture value that is close to accurate is displayed, and when the weighing device measures a certain weight, it stops feeding the grain, and then the grain in the device is hydrated. Since the moisture value of the grain is measured by moving it to the moisture measurement container, there is no excess grain being fed into the moisture measurement container during grain moisture measurement, resulting in extremely accurate grain moisture. Measurements of values can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the grain moisture measuring device according to the present invention, and FIG. 2 is a control circuit thereof. 1... side wall part, 2... machine frame, 4... grain feeding device,
5... Weighing device, 6... Capacity sensor, 7... Moisture content sensor, 8... Supply port, 9... Discharge port, 1
0... Grain moisture measuring device, 11... Container for measuring moisture value.

Claims (1)

[Scope of utility model registration request] A measuring machine frame having a supply port at the top and a discharge port at the bottom is attached to the side wall of the dryer body. A weighing device for weighing grains, and a moisture value measuring container equipped with a capacitance sensor and a moisture content sensor for measuring the volume of grains are disposed below the weighing device, and the grain feeding device receives a signal from the weighing device. the weighing device is contacted to stop feeding grain, and the capacitance sensor and the moisture content sensor are corrected to correct the detection signal from the moisture content sensor based on the detection signal from the capacitance sensor. A grain moisture measuring device characterized in that the device is connected to an indicator via a circuit.