JPS59132350A - Grain moisture meter - Google Patents

Abstract

PURPOSE:To enable a quick and accurate measurement of water content by arranging a plurality of mobile electrodes on the bottom of a vertically movable press body and fixed electrodes below the press body corresponding to the mobile electrodes to lower it. CONSTITUTION:A vertically movable press body 1 housed in a case 2 of a moisture meter has four independent mobile electrodes P1-P4 projected on the bottom thereof. A sample carrying base 4 which moves into or out of a through hole 2a cut into the side of the case 2 made of an insulator and four tray-shaped fixed electrodes Q1-Q4 are provided corresponding to the mobile electrodes P1-P4. The electrodes P1-P4 are connected to those Q1-Q4 in a resistance- voltage conversion circuit 5, which is connected to a mean value computing circuit 7 on the output side thereof via an A/D conversion circuit 6. Then, the circuit 7 is connected to a digital display 9 provided in the case 2 on the output side thereof via a display driving circuit 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a manual resistance type moisture absorber that measures the moisture content of grains by manually moving an electrode and crushing the grains with the tip of the electrode, applying an electric current, and measuring the moisture content of the grains from the resistance value. Regarding the meter.

This type of moisture meter can crush and measure a small number of grains (about 10 grains) at one time, so if even one grain of green rice happens to be mixed in, it will give an abnormal value and cause variations in the measurement (iQ). cannot be avoided.

Therefore, conventionally, when measuring the moisture content of drying grains using this moisture meter, it was necessary to measure the sample taken out of the dryer several times and then calculate the average value of all the measured values again, which made the measurement work much easier. The drawback was that it was complicated.

The present invention aims to improve this drawback by providing a single moisture meter with multiple electrodes and an average value calculation circuit, and by calculating the average value of the measured values of each electrode in one operation, it is easy and quick. The purpose is to enable accurate moisture measurement.

The present invention will be explained based on the embodiments shown in the drawings.
is a suppressor housed in the case 2 of the moisture meter, which can be raised and lowered, and has four independent movable electrodes P1 to P4 protruding from the bottom surface.

Reference numeral 3 denotes a screw rod rotatably attached to the center of the suppressor, and its screw portion 3a is screwed into the upper surface of the case 2.

Reference numeral 4 denotes a sample mounting table which is inserted into and removed from the through-hole 2a at the side of the case 2, and is made of an insulating material.Four dish-shaped fixed electrodes Ql to Q4 are attached to the moving electrodes Pl to P.
Deploy it in a position opposite to 4.

Then, the opposing electrodes Pl to P4 and Ql to Q4 are connected to a resistance voltage conversion circuit 5 installed in the case 2, and the output side thereof is connected to an average value calculation circuit 7 via an AD conversion circuit 6. The output side of the display drive circuit 8 is connected to a digital display 9 provided in the case 2 via a display drive circuit 8. C indicates a board incorporating these circuits 5 to 8.

Then, the sample grains taken out from the dryer are divided into small quantities, for example, 10 grains, and placed on four fixed electrodes Ql to Q4.
After inserting the mounting table 4 into the case 2, turn the handle on the head of the screw rod 3 with your fingertips and screw it into the case 2.
Lower the suppressor l to the normal position.

This results in four pairs of moving piIP to P4 and a fixed electrode Q.
Between 1 and Q4, the grains are crushed and a voltage is applied between the opposing electrodes. After each resistance value between these four pairs of electrodes is converted into a voltage value by circuit 5, it is converted into a digital quantity by circuit 6, and the average value of the output value is calculated by circuit 7, and the obtained average value is It is displayed on the display 9 via the circuit 8.

Note that the AD conversion circuit 6 may be omitted, a needle-hole analog display may be connected in place of the digital display 9, and the average value may be read from the pointer.

In short, in the present invention, a plurality of moving electrodes Pl to P4 are provided on the bottom surface of a suppressor that can be raised and lowered, and
Fixed electrodes Ql to Q4 are arranged below the pressing body opposite to each of the moving electrodes PI to P4, and by lowering the pressing body I, the grains placed on each of the fixed electrodes Q1 to Q4 are transferred to the moving electrodes. The average value of all the resistance values between the opposing electrodes is displayed on the display via the average value calculation circuit connected to both electrodes. It is possible to measure the average value after correcting the variation in the moisture value of the grain between each electrode, and it is possible to easily and quickly measure the accurate moisture content.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a moisture meter embodying the present invention, FIG. 2 is a bottom view of its suppressor, and FIG. 3 is a prong diagram of the moisture meter. Pi to P4 are moving electrodes, Ql to Q4 are fixed Pl poles,
1 is a pressing body, 4 is a sample mounting table, 5 is a resistance voltage conversion circuit,
6 is an AD conversion circuit, 7 is an average value calculation circuit, and 9 is a digital display. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Agent: Tetsube Maki (and 2 others) Figure 1 Figure 3

Claims (1)

[Claims] A plurality of movable electrodes are provided on the bottom surface of a pressing body that can be raised and lowered, and fixed electrodes are provided below the suppressing body opposite to each moving electrode. A grain moisture meter in which grains to be placed are crushed between a moving electrode and the average value of all resistance values between opposing electrodes is displayed on a display via an average value calculation circuit connected to both electrodes.