JPH0594757U - Moisture detector - Google Patents

Abstract

(57) [Summary] [Purpose] Easily detect moisture in invisible places such as soil or dark floors. [Structure] An electrode 2 is fixed to the tip of a conductive outer cylinder 1 via an insulator 3, and the electrode, a dry cell 4 and a moisture meter 5 provided at the other end of the outer cylinder, and an outer cylinder are connected in series by a lead wire 6. Connecting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the detection of moisture, and mainly relates to a moisture detector used for easily detecting moisture in places that are not directly visible, such as moisture in soil or water leaks under the floor.

[0002]

[Prior Art]

 The present invention is intended to electrically detect moisture, and as a method for electrically measuring moisture, an electric resistance method, a dielectric constant method, a high frequency resistance method, etc. are known. Among these, the electric resistance method is widely used to measure moisture in wood, cereals, paper, food, fiber, soil, etc., because the device is simple and inexpensive. In the moisture measurement by the electric resistance method, it is general to sandwich a sample between a pair of electrodes and measure the electric resistance at that time to calculate the moisture content.

[0003]

[Problems to be solved by the device]

 In horticulture and landscaping, even if a large amount of water is replenished, the water does not penetrate into the soil, and the plants are often dried up due to local lack of water, causing the plants to die. On the contrary, it may die due to excessive water content. However, moisture management is not satisfactory because no simple method for detecting moisture in soil has been proposed yet. On the other hand, although there may be problems in terms of maintenance due to water leaks in the dark underfloor or above the ceiling, it may not be sufficient because there is no simple method for detecting water.

An object of the present invention is to provide a device for easily detecting moisture in an invisible place such as soil or a dark floor.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present inventor has proposed a method in which an electrode integrating an anode and a cathode is fixed to the tip of an elongated pipe, and the electrode and the electric resistance type moisture meter are connected by a lead wire passing through the pipe. I proposed earlier. (Practical application No. 3-72522). The present invention relates to an improved solution that further simplifies the structure.

That is, in the moisture detector of the present invention, the electrode (2) is fixed to the tip of the conductive outer cylinder (1) through the insulator (3) and is provided at the other end of the electrode and the outer cylinder. The dry battery (4), the water content meter (5) and the outer cylinder are connected in series by a lead wire (6).

As a result, the previously proposed two electrodes can be made into one electrode, and the device structure can be simplified.

Providing a power switch on the conductive outer cylinder helps prolong the life of the dry battery. From the practical point of view, the mounting location is near the moisture meter.

As the moisture meter of the present invention, a general electric measuring instrument (ammeter, voltmeter, resistance meter, etc.) can be used. For the purpose of the present invention in which simplicity is prioritized over accuracy, a device that is as simple as possible is preferable. The moisture meter display may be compared by the degree of deflection of the ammeter or ohmmeter needle, but it can be replaced with the water concentration display. For example, display methods such as low water content, high water content, and different colors can be proposed.

[0010]

[Work]

 When the electrode of the moisture detector configured as described above is inserted into the object to be measured, an electric current flows between the electrode and the conductive outer tube according to the amount of moisture. The water content of a substance can be detected. For example, when the water content of soil is examined using an ammeter as a moisture meter, most soil has a very large resistance in a dry state and current does not flow, and the pointer does not move. Since the pointer moves according to the amount, you can check the presence or absence of water. Since the way the pointer moves depends on the contact state between the electrode and the object to be measured, the water content in the object to be measured can be relatively known by varying the contact state and determining the maximum value at which the pointer can swing.

[0011]

【Example】

 An embodiment will be described with reference to the drawings. A conductive outer cylinder (1) having a long left side and a thick right side as shown in FIG. 1 is prepared. This may be an integral structure of thin plates or a structure in which they are combined in the middle. An electrode (2) having a molybdenum tip is fixed to the left end of the outer cylinder via an insulator (3). On the other hand, a dry battery (4) and a moisture meter (5) are provided on the right side. As the moisture meter, various electric measuring instruments such as an ammeter, a voltmeter, and a resistance meter can be used. Next, the electrode, the dry cell, the moisture meter, and the outer cylinder are connected in series by the lead wire (6) to form an electric circuit. There are various connection methods, for example, there is an electrode-dry cell-moisture meter-outer tube method as shown in FIG.

In the embodiment shown in FIG. 1, a switch (8) capable of opening and closing a power source is provided near the moisture meter.

To use the moisture detector, all that is required is to turn on the power supply, insert the electrode into the object to be measured, and read the deflection of the pointer of the moisture meter at that time. For example, when measuring the water content in the soil, insert the electrode to the depth you want to measure and swirl it so that the electrode and the soil in the vicinity are in good contact, and the electrical resistance will change depending on the water content. Since the way the guide is swung is different, you can get an overview of how much water is contained.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects.

When the electrode was inserted into a flowerpot whose surface was covered with algae, the pointer of the moisture meter moved greatly, and it was found that there was still sufficient moisture.

After the rain, the electrode was inserted under the dark floor, but it was found that there was no infiltration of rainwater because the pointer did not move.

[Brief description of drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is a perspective view of the present invention.

FIG. 3 is a side view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Conductive outer cylinder 2 Electrode 3 Insulator 4 Dry battery 5 Moisture meter 6 Lead wire 7 Changeover switch 8 Power switch 9 Insulator 10 Handle

Claims (2)

[Scope of utility model registration request] 1. An electrode (2) is fixed to the tip of a conductive outer cylinder (1) through an insulator (3), and a dry battery (4) and a moisture meter ( 5) and the outer cylinder are connected in series with a lead wire (6), which is a moisture detector. 2. A power switch (8) is provided on the conductive outer cylinder (1), preferably near the moisture meter (5).
Moisture detector described.