JPH0716993Y2 - Rotary multi-point simultaneous potential measurement device - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed to measure the potential of the basic grid-like potential of reinforcing bars and pipes existing in the concrete or the soil that is the electrolyte, with the reference electrode for potential measurement projected on the surface of the rotating cylinder. The present invention relates to a rotary multi-point simultaneous potential measuring device which is efficiently arranged by linearly arranging the cylinder in the rotational direction and the longitudinal direction.

Conventionally, for example, when measuring the electric potential of a metal body such as a reinforcing bar or a buried pipe existing in concrete or soil particularly finely, one reference electrode is manually fixed to the concrete surface or the ground surface to make one point or one point. Since the measurement was performed while moving the electrode, time loss and physical burden were very large.

A specific example of this is shown schematically in FIGS. 1 and 2.

That is, in the conventional example shown in FIG. 1, for example, when measuring the electric potential of the reinforcing bars of reinforced concrete on a grid at 10 cm intervals, a large number of mark lines are drawn in advance vertically and horizontally to form a grid and the measurement position is set. After deciding, by the method shown in FIG. 2, connect the lead wire electrically connected to the rebar, which is the object to be measured, to the terminal of the potential (volt) meter, and connect the terminal of the reference electrode with the lead wire to the terminal. A method has been employed in which the end of a lead wire is connected, then the reference electrode is manually placed on the concrete surface, and measurement is sequentially repeated. In this case, drawing work,
According to the analysis results of the examples, the time required for measurement, recording, electrode movement, etc., took about 20 seconds to measure one point. Now, for the purpose of comparison with the present invention, which will be described later, if 400 points are measured without a break, the measurement time requires 8000 seconds, that is, about 133 minutes or more (2 hours or more). This measurement work has not only a time problem but also a large loss of physical strength.

SUMMARY OF THE INVENTION In consideration of the above circumstances, the present invention provides an apparatus capable of measuring potentials efficiently by eliminating the above-mentioned various losses, and efficiently and without exhaustion of physical strength. A reference electrode having a plurality of constant-angle branch legs arranged at regular intervals in the longitudinal direction of a rotary cylinder, in which rolling wheels are integrally provided at both ends, is placed outside the cylinder with the contact portion of the ends of the branch legs on the same cylinder axis. A sliding electrical connection device including a slip ring and a brush is disposed between the hollow rotating shaft for a wiring duct pivotally attached to both ends of the rotary cylinder and the inner wall of the rotary cylinder while being fixed in an exposed manner. The lead wire of the verification electrode is connected to this, and a microswitch is installed that turns on only when the contact portion of the verification electrode is in contact with the surface to be measured, and turns off otherwise. Simultaneous multiple storage device in which the extension of the shaft is connected to the lead wire In pushing the equipped with castors box is obtained by with the rotation opposing rolls on the surface to be measured.

An embodiment of this will be described below with reference to FIGS. 3 and 4.

FIG. 4 is an overall plan view of the device of the present invention, and FIG. 3 is an enlarged view of an essential part of the device of the present invention in an embodiment in which the mounting mode of the microswitch is different from that of FIG.

In FIGS. 3 and 4, holes having the same diameter as the tip of the single reference electrode body formed into a cross are formed in the plastic rotary cylinder at four positions at intervals of 10 cm in the axial direction of the cylinder. That is, 16 holes are opened in a grid when the rotary cylinder is expanded. Each hole has a single collation consisting of a spiral pure copper wire and a porous solidified backfill made of copper sulfate crystals, gypsum and water, which is halved at the center of the hole. Each leg of the electrode body is attached. A rubber rolling wheel with an outer circumference of 40 cm is integrally provided on both ends of the rotary cylinder, and a bearing is fitted to the rolling wheel. Install with pins.

However, the rotary cylinder and the ring are not in a relationship where they can be moved by being cut off from each other. Further, when the rotary cylinder rolls on the surface to be measured, the tip contact portions of the legs of the single reference electrode body sequentially come into contact with the four measurement positions aligned on the same line of the grid shown in FIG. Become.

The hollow rotary shaft is insulated and has a slip ring on one side 2
A total of four pieces are attached and fixed, and a carbon brush is fixedly provided to the rotary cylinder so as to face the slip ring, and the carbon and the pure copper wire are connected by a lead wire. In addition, a micro switch with a roller is fixed to the plate attached to the hollow rotating shaft for giving an instruction to take in the electric potential.

In the example of FIG. 3, the roller is adapted to touch each leg of the single reference electrode body.
N, separated and turned off.

Therefore, as will be described later, the extension of the hollow rotary shaft is fixed to the box, and the hollow rotary shaft is in a fixed relationship with the rotating rotary cylinder. When the tip ends of the legs are installed in a coordinated relationship in which the tips of the legs are in contact with each other when they are in contact with the surface to be measured, the measurement can be performed only when the reference electrodes are in contact.

In the example shown in FIG. 4, the microswitch is attached to the hollow rotary shaft, and the claw portion that the roller touches is fixed to the inner wall surface of the rotary cylinder. The installation is ON, O
The FF operation is designed to be turned on by touching the claw part.

The extension of the hollow rotary shaft is bent and integrally joined to the steel box with casters, which
The hollow rotary shaft is a member that is constrained by the box and does not swing unintentionally, that is, a member that is integral with the box. Therefore, the rotating cylinder pivotally supported in front of the box rolls on the surface to be measured by pushing the box.

All the lead wires connected to the slip ring and the micro switch pass through the hollow rotary shaft and the inside of the extension portion, and are guided into a steel box with casters for mounting the storage device shown in FIG. Also, the steel box is equipped with a handwheel with a height of about 900 mm. In the figure, an oil-resistant rubber rubber that is good to cover the rotary cylinder is a hygroscopic sponge that is good to equip the tip of the electrode measurement sensor.

In the embodiment, a commercially available rechargeable handy type personal computer is preferably used as the storage device.

However, it is necessary to attach at least a liquid crystal display, an auxiliary storage device (recording of programs and data), a communication line interface, and an A / D converter (12-bit, 8 channels in the embodiment) to the personal computer. Now, the input from the matching electrode is selected by an A / D converter (multiplexer) with 8 channels (4 channels are used in the embodiment), and the signal is A / D.
D-converted, and the converted data is taken into a personal computer. By repeating this process, the data from the designated channel is sequentially fetched, so that the data is finally stored in the auxiliary storage device.

Then, through the data transfer interface of the above-mentioned handy type computer and the desktop computer, data is recorded in a floppy disk or the like via the desktop computer by parallel transmission or serial transmission, and various analyzes such as distribution maps by potential colors are possible by the program. Can be

By measuring the same number of 400 points as described above by linking the rotary multi-point simultaneous potential measuring device and the multiple storage device,
The time required is about 3 minutes, which is about 1/40 of the manual method.
Not only does it take the required time, but it can be measured simply by pushing the handle, so there is no physical consumption. Further, as another application example, it can be used for actual measurement of a potential difference.

As described above, according to the present invention, industrially useful effects such as the potential measurement, which is indispensable for the corrosion protection technology, can be measured much more economically and efficiently than the conventional method.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view for marking a potential measurement position in a conventional method, FIG. 2 is a sectional view showing the measurement method, and FIG. 3 is a main part of the device of the present invention in which a microswitch is attached. The figure which expanded and showed in the embodiment which changed the mode from FIG. 4, FIG. 4 is the whole plan view of the device of this invention. Explanation of symbols …… Mark line …… Measurement position …… Potential (voltage)
Total, ... Reinforcing bar, ... Lead wire, ... Lead wire,
…… Reference electrode, …… Concrete surface, ・ ・ ・ Human hand, ・ ・ ・ Plastic rotary cylinder, ・ ・ ・ Single reference electrode body, ・ ・ ・ Hole, ・ ・ ・ Pure copper wire, ・ ・ ・ Backfill,
...... Bearings, rolling wheels, ...... hollow rotary shafts,
...... Ring, ...... Pin, ...... Slip ring, ...
... Carbon brush, ... lead wire, ... plate,
...... Micro switch with roller, ...... Claw, ...
... Memory device, ... Caster, ... Steel box with caster, ... Handwheel, ... Oil-resistant rubber rubber, ... Hygroscopic sponge, ... Leg, ... Roller, ... Extension part.

Claims (1)

[Scope of utility model registration request] 1. A verification electrode having a plurality of constant-angle branch legs arranged at regular intervals in the longitudinal direction of a rotary cylinder in which rolling wheels are integrally provided at both ends, and the contact portions at the ends of the branch legs are on the same cylinder axis. A sliding electric device including a slip ring and a brush between the hollow rotary shaft for the wiring duct pivotally attached to both ends of the rotary cylinder and the inner wall of the rotary cylinder. A connecting device is provided to connect the lead wire of the verification electrode to this connection device, and a micro switch is installed which turns on only when the contact portion of the verification electrode is in contact with the surface to be measured and turns off otherwise. Then, the rotation cylinder is characterized in that the rotary cylinder rolls on the surface to be measured by pushing a box with casters mounted with a simultaneous multiple storage device in which an extension of the hollow rotary shaft is connected to the lead wire. Type multi-point simultaneous potential measuring device.