JPH056361U - Viscous particle property measuring instrument - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to be able to measure the precise electric resistance of viscous particles such as soil. [Structure] The lower electrode 1 and the upper electrode 3, and the probe portion formed by the insulator 2 between both electrodes is attached to the base portion of the upper electrode 3 after the base portion of the upper electrode 3 to attach a flange portion 10 having a larger sectional area than the base portion When the part is inserted into the soil, the brim can be used to press down the soil to improve the adhesion of the surrounding soil to the lower electrode 1 and the upper electrode 3 in the soil, and the electrical resistance in the soil can be precise and accurate. The value can be measured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a viscous particle size characteristic measuring instrument for measuring an electric resistance of a measuring object by inserting a rod-shaped probe part having at least two electrode parts into the measuring object.

[0002]

[Prior Art]

 To measure the electrical resistance of conventional viscous particles such as soil, at least two test rods each having an electrode are inserted into the soil and the electrical resistance between the two electrodes is measured. It was However, even if two electrode rods were used, if the distance between the electrode rods was different each time the measurement was made, the measurement results also depended on the distance, and reliable measurement results could not be obtained.

Therefore, instead of inserting two electrode rods each having an electrode into the soil, the electrical resistance in the soil is measured with only one test rod at a predetermined interval from the tip of the rod. An object has been developed in which two electrode parts are provided and the electric resistance between the two electrode parts is measured. This type of test rod has a pointed tip or a tapered entire insertion portion to facilitate insertion into a viscous particle. The electrical resistance of the insertion part was measured by inserting it into. As a result, the measurement location can be used in a narrow range and is easy to use.

An example of this conventional test rod is shown in FIG. In FIG. 5, 50 is a probe portion of a measuring instrument for measuring electric resistance in soil, 51 is a lower electrode at the tip, 52 is an upper electrode provided at the base, and 53 is an insulating material formed of an insulating material. The layer 54 is also a base portion formed of an insulating material.

[0005]

[Problems to be solved by the device]

 However, viscous particles such as soil have the property of being difficult to return to the base when a hole is made with a protrusion. In the conventional probe portion as shown in FIG. 5, the tip portion is tapered so that it can be easily inserted into the soil, and the lower electrode 51 is provided at the insertion tip, so that the tip portion is firmly inserted into the soil. When touched, the contact between the lower electrode 51 and the soil can be sufficiently maintained. However, the upper electrode 52 portion has a larger hole diameter than the previously inserted portion, and cannot sufficiently maintain contact with soil. In order to make good contact with the soil even a little, it needed a considerable size and thickness. For example, the length needs to be 5 to 8 cm and the thickness needs to be 4 to 5 cm. However, even with this, the effect of the taper could not be removed, the contact with the soil was insufficient, and precise measurement results could not be obtained. Also, in the case of a small area such as a flower pot, the probe part could not be inserted due to its large diameter, and the electrical resistance in the soil could not be measured.

Further, the taper angle could not be so steep that a large force was required for insertion.

[0007]

[Means for Solving the Problems]

 The present invention has been made for the purpose of solving the above problems, and has the following configuration as one means for solving the above problems. That is, with a viscous particle size characteristic measuring instrument that measures the characteristics of the measurement target by inserting the rod-shaped probe part in which at least two detection electrode parts for detecting the characteristics of the viscous particle size are inserted into the measurement target. In the rod-shaped probe portion, the first electrode portion is arranged near the tip portion, the second electrode portion is arranged from the root of the first electrode portion, and the second electrode portion is arranged. The electrode portion and the first electrode portion are electrically insulated from each other, an insulating material is formed between the two electrode portions, and the base of the rod-shaped probe portion is larger than the rod-shaped probe portion base portion. The probe portion has a collar forming portion that extends from the base portion at an angle of substantially right angle or less.

[0008]

[Action]

 In the above configuration, since the brim portion is formed in the probe portion, it is possible to obtain a good contact state between the measurable object and the electrode portion by pressing the measurable object from above with the brim portion and pressing the measurable object. Therefore, it is possible to accurately and accurately measure the characteristics of the measured object. Also in this case, it is not necessary to make the insertion portion of the probe portion into the measurement object thick, and insertion into the measurement object is easy.

[0009]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The following description will explain an example in which the viscous particle size characteristic measuring device of the present invention is applied to an electric resistance measuring device for measuring the electric resistance of an object to be measured. However, the present invention is not limited to the electrical resistance measuring instrument, and instead of the electrode part, it has a detecting part capable of detecting the characteristics of a plurality of various measurement targets, and can detect arbitrary viscous particle characteristics. Can be That is, the water content, acidity, alkalinity, etc. of the viscous particle can be easily measured with the same constitution.

FIG. 1 is a cross-sectional view showing the structure of a measuring terminal portion including a probe portion of an electric resistance measuring instrument for measuring electric resistance according to an embodiment of the present invention. In the figure, 1 is a lower electrode made of a conductive metal having a substantially cylindrical tip tapered shape, and 2 is an insulator having a substantially cylindrical tip with a lower electrode 1 inserted and fixed at the tip. Composed of. Reference numeral 3 denotes an upper electrode made of a conductive metal, which has a substantially cylindrical tip and is slightly tapered, and has an insulator 2 pierced and fixed in a central hole. The upper electrode 3, the insulator 2, and the upper electrode 3 form It constitutes the probe portion of the embodiment.

Reference numeral 4 denotes a bush formed of an insulating material, which is composed of, for example, a diuracon. Reference numeral 5 is a base body formed of an insulating material such as Bakelite, and has a substantially cylindrical body having a flange portion 10 provided at the tip end thereof with a hole into which the upper electrode 3 can be fitted via the bush 4. Reference numeral 6 denotes a signal cord protection cap made of an insulating material for fixing the signal cords 7 and 8, and the base portion of the base portion 5 is fitted therein.

Reference numerals 9 and 10 are lead wires, one of which is electrically connected and fixed to the lower electrode 1 and the upper electrode 3 by soldering or the like, and the other of which is connected to the signal cable. As shown in FIG. 1, in the present embodiment, the probe portion is made extremely small, and the lower electrode 1 has an exposed portion length of 8 mm to the outside, a thickness of 2 mm, and the lower electrode 3 has the same length of 14 mm. The length of the exposed portion of the insulator 2 is also 12.5 mm. Thus, even the thickest part of the probe part has a thin diameter of 5.5 mm.

The base portion 5 has a length of 122 mm and a thickness of 12 mm. That is, in this embodiment, the diameter of the insulator 5 is 12 mm, compared to the probe base diameter of 5.5 mm shown by 10 in FIG. 1, and a collar portion of about 3.25 mm is formed. In this embodiment, the angle θ with the probe shown in FIG. 2 is 90 degrees. In this way, by providing the collar portion which is a thicker portion (wider) than the upper electrode 3 of the probe portion, for example, when measuring the electrical resistance in soil, the probe portion is Is inserted into the soil from the lower electrode 1 portion. Insert the collar to the 10th position and then press the soil with the 10th flange to squeeze the soil. As a result, the lower electrode 1 portion is kept in good contact with the soil, and the upper electrode 3 portion is also brought into close contact with the soil, enabling precise and accurate measurement of electric resistance.

The electrical resistance measuring device of the present embodiment is not limited to the above example of measuring the electrical resistance in soil, and if the material has a viscous particle size, insert the probe part into any object, After that, by pressing out the viscous particle size material from the collar 10 and pressing it down, it is possible to measure the electric resistance value accurately and accurately. In the embodiment described above, the angle θ between the collar portion 10 and the probe portion is set to 90 degrees, but the present invention is not limited to the above angle and the measurement target can be narrowed down. Any configuration may be used, and if it is approximately 90 degrees or less, similar adhesion with the detection portion can be secured.

For example, as shown in FIG. 3, even if the angle θ is set to 45 degrees, the same precise electric resistance measurement can be performed. Further, the ratio of the cross-sectional areas of the probe portion base portion and the collar portion is not limited to the above example, and substantially the same action and effect can be achieved if the collar portion has a larger cross-sectional area than the probe portion base portion. FIG. 4 shows an example of the measurement result of the electric resistance value measured in the soil when the angle θ of the collar portion 10 and the ratio of the cross-sectional areas of the circular probe portion base portion and the circular collar portion are changed. The angle display in FIG. 4 indicates the angle θ of the collar portion.

As described above, according to this embodiment, the cross-sectional area of the collar portion is made wider than that of the probe portion base portion, and the angle θ between the probe portion base portion and the collar portion is set to about 90 degrees or less. After inserting the probe into the object to be measured, the collar can be used to further squeeze the object to be measured, and both the lower electrode 1 and the upper electrode 3 of the probe can be brought into close contact with the object to be measured. it can. Therefore, it is possible to accurately and precisely measure the electric resistance value between the electrodes.

[0017]

[Effect of the device]

 As described above, according to the present invention, since the flange portion is formed on the probe portion, the measurement object is pressed from above by the collar portion to squeeze the measurement object and obtain a good contact state between the measurement object and the electrode part. You can Therefore, it is possible to accurately and precisely measure the characteristics of the measured object.

Also in this case, it is not necessary to make the insertion portion of the probe portion into the measurement object thick, and the insertion into the measurement object is easy.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an electric resistance measuring instrument according to an embodiment of the present invention,

FIG. 2 is a diagram showing an example of an angle between a probe portion and a collar portion of the electric resistance measuring instrument of the present embodiment,

FIG. 3 is a diagram showing an example of an angle between a probe portion and a collar portion of an electric resistance measuring instrument according to another embodiment of the present invention,

FIG. 4 shows the measured resistance value when the angle between the probe portion and the collar portion and the ratio of the cross-sectional area between the probe portion base portion and the collar portion of the electrical resistance measuring instrument in the embodiment according to the present invention are changed. Diagram showing the relationship,

FIG. 5 is a sectional view showing a structure of a conventional electric resistance measuring instrument.

[Explanation of symbols]

 1 Lower electrode 2 Insulator 3 Upper electrode 4 Bush 5 Base part 6 Signal code protection cap 7,8 Signal code 9,10 These are lead wires.

Claims (1)

[Claims for utility model registration] [Claim 1] The characteristics of the measurement object are measured by inserting a rod-shaped probe section provided with a detection electrode section for detecting at least two viscous particle size characteristics into the measurement object. In the viscous particle size characteristic measuring device, a rod-shaped probe portion has a first electrode portion disposed in the vicinity of a tip portion thereof, and a second electrode portion disposed from the root of the first electrode portion. In addition, the second electrode portion and the first electrode portion are formed of an insulating material between the two electrode portions so as to electrically insulate each other, and A viscous particle size characteristic measuring instrument having a collar forming portion which is larger than the rod-shaped probe portion base portion and extends at an angle of substantially right angle or less.