JP6127768B2 - Electrode device for liquid potential measurement - Google Patents

Description

  The present invention relates to an electrode device for measuring a liquid potential used for measuring a potential in a liquid.

  In order to know the potential difference between two points in the sea and other liquids, two electrode devices are put into the liquid, and each electrode device measures the minute potential at two points and collects time series data. Sometimes.

  Usually, an electrode device is configured by housing an electrode inside a structure in which an opening communicating between the inside and the outside is formed, and installing a filter in the opening (see, for example, the following patent document). The filter functions to prevent sand, mud, dust and the like from entering the structure. For the filter, insulating porous glass or nonwoven fabric is used.

  When the electrode device is immersed in the liquid for a long time, microorganisms such as algae adhere to and accumulate on the filter. Eventually, the filter may be clogged. Such contamination of the filter is not preferable because it leads to a decrease in the S / N ratio of the voltage signal sensed through the electrode.

JP 2010-019815 A JP 2007-285864 A

  The present invention is intended to prevent the accumulation of microorganisms such as algae on the filter of the electrode device for measuring the potential in liquid.

In order to solve the above-described problems, the present invention is used to measure the electric potential in a liquid that is disposed in the liquid, and an opening that communicates the inside and the outside is formed and the electrode is accommodated therein. A structure, a filter having a hole that shields the opening of the structure, and an outer surface of the filter or in the vicinity thereof, and a large through hole is formed in comparison with the hole of the filter, An in-liquid potential measuring electrode device comprising a substrate on which the antimicrobial material containing the same ionizing component as the electrode material was applied to the back surface facing the filter or the inner peripheral surface of the through hole was configured.

When silver is used as the material for the electrode, the antimicrobial material contains silver as an ionizing component.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that microorganisms, such as algae, accumulate on the filter of the electrode apparatus for liquid potential measurement.

The side sectional view of the electrode device for potential measurement in liquid of one embodiment of the present invention. The figure explaining the usage method of the electrode apparatus of the embodiment.

  An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the structure of the electrode apparatus 1 for a liquid potential measurement of this embodiment is shown. The electrode device 1 includes a structure 2 in which an opening 211 that communicates between the inside and the outside, an electrode 3 accommodated in the structure 2, a filter 4 that shields the opening 211 of the structure 2, And an antimicrobial material 5 provided in the vicinity of the outer surface.

  The structure 2 includes a case body 21 having a cylindrical shape with a large opening at one end and a lid body 22 attached to one end of the case body 21. The electrode 3 disposed in the internal space of the case body 21 is supported on the inner wall surface of the case body 21 via the support body 23. The lead wire 7 connected to the electrode 3 is guided to the outside of the case body 21 through an insertion hole 212 formed in the bottom wall on the other end side of the case body 21.

  A region around the electrode 3 in the internal space of the case body 21 is a liquid chamber filled with a liquid equivalent to the liquid surrounding the outside of the electrode device 1. When the electrode device 1 is used by being inserted into the sea, artificial seawater, a 3.5% NaCl aqueous solution, or the like is previously injected into the liquid chamber.

  The lid body 22 is a member for fixing the filter 4 and the antimicrobial material 5 to the case body 21, and is screwed or fitted to one end side of the case body 21. The lid body 22 is provided with an outflow inlet 221 having a size comparable to that of the opening 211 of the case body 21.

  The electrode 3 is configured using a highly conductive metal material, particularly silver, so that a minute potential in the liquid can be measured. In the present embodiment, it is assumed that AgCl is adopted as the material of the electrode 3.

  The filter 4 closes the opening 211 on one end side of the case body 21 to prevent sand, mud, dust, etc. from entering the case body 21. The filter 4 has an insulating property, and allows the liquid to flow in and out between the inside and the outside of the case body 21 (however, the flow rate does not increase beyond a predetermined value, that is, the inside and outside of the case body 21 are remarkable. A member with a fine hole that does not generate a liquid flow). The filter 4 is comprised using porous glass, a nonwoven fabric, etc., for example.

  The antimicrobial material 5 plays a role of preventing the microorganisms from adhering to and accumulating on the outer surface of the filter 4 to contaminate the filter 4. The antimicrobial material 5 contains the same ionized component as the material of the electrode 3 and suppresses the growth of microorganisms by the ions. If the electrode 3 uses silver, the antimicrobial material 5 also contains silver, and the bactericidal action of silver ions is used to maintain the characteristics of the filter 4. The purpose of making the ionization component equal between the electrode 3 and the antimicrobial material 5 is to reduce the difference in ionization tendency between the two as much as possible and to suppress the flow of noise current through the electrode 3.

  In the present electrode device 1, a base 6 coated (or plated) with silver as an antimicrobial material 5 is disposed in contact with or close to the outer surface of the filter 4. The base 6 is provided with a plurality of through holes 61 that are significantly larger than the holes of the filter 4. The liquid surrounding the outside of the electrode device 1 can freely go back and forth between the front and back of the substrate 6 through the through hole 61. Therefore, there is almost no change in the sensitivity characteristic of the electrode 3 due to the base 6 being installed on the outer surface side of the filter 4. Silver is applied to the front and back surfaces of the substrate 6 and the inner peripheral surface of the through hole 61. However, silver may be applied only to the back surface of the base 6 facing the filter 4, or silver may be applied only to the inner peripheral surface of the through hole 61.

  The base 4 that supports the filter 4 and the antimicrobial material 5 is sandwiched between the top wall on one end side of the case body 21 and the lid body 22. A member 8 such as an O-ring or a gasket may be interposed between the lid body 22 and the base body 6, between the base body 6 and the filter 4, and / or between the filter 4 and the top wall of the case body 21. Good.

  In FIG. 2, the usage example of this electrode apparatus 1 is shown. When measuring a potential difference between two points in a liquid, a data processing device (electronic computer) in which two electrode devices 1 are arranged at each point and a minute potential sensed by each electrode device 1 is mounted on a ship or the like. Collect and process at 9.

  In the present embodiment, the structure 2 that is disposed in the liquid and used to measure the electric potential in the liquid, the opening 211 that communicates with the inside and outside is formed, and the structure 2 that houses the electrode 3 therein, In-liquid potential measurement comprising: a filter 4 that shields the opening 211 of the structure 2; and an antimicrobial material 5 that contains the same ionized component as the material of the electrode 3 and is provided on the outer surface of the filter 4 or in the vicinity thereof. An electrode device 1 was constructed.

  According to this embodiment, microorganisms such as algae can be prevented from adhering and depositing on the filter 4, and a decrease in the S / N ratio of the voltage signal sensed via the electrode 3 can be prevented over a long period of time. be able to.

Furthermore, if silver is used as the material of the electrode 3 and the antimicrobial material contains silver as an ionizing component, the electrical resistance of the electrode 3 can be sufficiently reduced and the bactericidal action by silver ions can be effectively utilized. Thus, the filter 4 can be prevented from being stained.

  The present invention is not limited to the embodiment described in detail above. For example, the material of the electrode 3 and the components contained in the antimicrobial material 5 are not limited to silver. When the electrode 3 is made of copper, the antimicrobial material 5 contains copper as an ionizing component.

  Other specific configurations of each part can be variously modified without departing from the spirit of the present invention.

  The present invention can be applied to an electrode device for measuring a potential in a liquid.

DESCRIPTION OF SYMBOLS 1 ... Electrode apparatus 2 ... Structure 3 ... Electrode 4 ... Filter 5 ... Antimicrobial material

Claims (2)

It is placed in the liquid and used to measure the electric potential in the liquid,
A structure in which an opening communicating between the inside and the outside is formed and the electrode is accommodated therein;
A perforated filter that shields the opening of the structure;
Provided on or near the outer surface of the filter, and has a large through hole compared to the hole of the filter, the same as the material of the electrode on the front surface, the back surface facing the filter, or the inner peripheral surface of the through hole An electrode device for measuring an in-liquid potential, comprising: a substrate on which an antimicrobial material containing an ionized component is applied . The electrode device for measuring a liquid potential according to claim 1, wherein silver is used as a material of the electrode, and the antimicrobial material contains silver as an ionizing component.

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