JPS6379068A - Detector for red tide generation - Google Patents

Abstract

PURPOSE:To certainly detect the generation of a red tide, by taking out oxygen in water to detect the concn. thereof. CONSTITUTION:An oxygen take-in part 1 is constituted of a large number of tubular hollow fibers and the end parts of the tubular hollow fibers are aligned to close one ends thereof while the other and parts thereof are collected to be connected to a hollow pipe 4 and the connection part of the end part of the tubular hollow fiber group and the hollow pipe 4 is fixed in a hermetically sealed state. The oxygen taken-in by the oxygen take-in part 1 is sent out to an oxygen densitometer 2. For example, the densitometer 2 is composed of a galvani system wherein a pair of a platinum electrode 11 and a lead electrode 12 are immersed in an electrolyte 13. The electrode 11 contacts with oxygen through a Teflon membrane 14 and oxygen transmits through the membrane 14 to enter the electrolyte 13 and, as a result, chemical reaction is generated and current (i) flows from the electrode 11 to the electrode 12. The signal formed by said carrent (i) is sent out to a display device 3 which in turn allows, for example, a red lamp to put ON and OFF when the concn. of oxygen is a predetermined value or less. By this method, the generation of a red tide can be certainly detected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for detecting the occurrence of red tide by extracting oxygen from water and detecting the oxygen concentration.

(Prior Art) Conventionally, the occurrence of red tide has been known by visual observation.

(Object of the invention) The object of the invention is to automatically detect the occurrence of red tide.

(Configuration for achieving the object of the invention) Extracting oxygen from water using human L gills and measuring the concentration of this oxygen,
The display is configured to be driven based on the measured oxygen concentration.

(Example) FIG. 1 shows an embodiment of the invention.

The element-resistant uptake part l is composed of one artificial gill and is held in water.

Figures 2.3 and 4 show an example of one artificial gill.

FIG. 2 schematically shows an enlarged hollow fiber base constituting an artificial gill, and FIG. 3 shows a cross section of a tubular hollow fiber that is an example of an artificial gill. Figure i4 shows the deposition of the silicone coating on the hollow fiber substrate 7. ji″.

to show the appearance.

The hollow fiber substrate 6 is a hollow fiber formed of a tube interior 8 surrounded by a side wall 7, and has a diameter of, for example, 300 microns and a wall thickness of, for example, 50 microns. The side wall 7 has a diameter of 10
It has penetrating micropores of micron size or less, and its porosity is, for example, 50%. Side wall surfaces 7a and 7b are the outer wall surface and inner wall surface of the hollow fiber, respectively. A liquid-impermeable silicone coating 9 is formed on the outer wall surface 7a and the inner wall surface 7b so as to close the openings of the micropores. The material shown in FIG. 4 can be obtained by immersing hollow fibers in a solution containing silicone, such as methylhydrodiene polysiloxane. The hollow fiber substrate 6 is made of, for example, cellulose acetate, vinyl chloride, polyacrylonitrile, polyamide, or the like.

Oxygen contained in the water passes through the silicone membrane 9 that closes the micropores of the hollow MFA substrate 6 and enters the tube interior 8 .

The oxygen uptake part l is constructed using a large number of tubular hollow fibers, and these tubular hollow fibers ti! The ends of Am are aligned, one end is closed, and the other ends are connected together to the hollow tube 4. The end of the tubular RLT hollow fiber group and the connecting portion of the hollow tube 4 are sealed and fixed.

Oxygen taken in by the oxygen intake part 1 is sent to the oxygen concentration meter 2. The oxygen concentration meter 2 uses a galvanic cell type, for example, as shown in FIG.

A pair of electrodes, a platinum electrode 11 and a lead electrode 12, are connected to an electrolyte 1
It is soaked in 3. The platinum electrode 11 is in contact with oxygen via the Teflon film 14. Oxygen passes through the Teflon membrane and enters the electrolyte, resulting in a chemical reaction that causes the platinum electrode 1
A current i flows from 1 to the ship owner 8i12.

The signal formed by this current i is sent to the display 3. The indicator 3 indicates that when the oxygen concentration is below a predetermined value,
For example, make a lamp blink. The oxygen concentration may be displayed digitally on the display 3 based on the input signal.

(Effects of the Invention) Since this invention uses artificial gills to extract oxygen from the water, it is possible to accurately detect the occurrence of red tide that is harmful to fish.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the invention. Figures 2.3 and 4 are diagrams showing examples of artificial gills. FIG. 5 is an example of an oxygen concentration meter.

Claims (1)

[Claims:] A red tide occurrence detector comprising means for extracting oxygen from water, means for measuring the concentration of this oxygen, and an indicator that is driven based on the measured oxygen concentration.