JPS61161436A - Measuring method of viscous solution characteristic of non-newton fluid on the basis of magnetic attraction method - Google Patents

Abstract

PURPOSE:To measure the viscosity, yield value, stress relaxation, etc. of a viscous solution sample with easy operation by sampling the viscous solution into a thin pipe, inserting a magnetic rod into the thin pipe, and applying a magnetic field to the thin pipe to move the magnetic rod. CONSTITUTION:A viscous solution sample 6 is sampled into the thin pipe 3 and an air lock/electrode rod 7 is inserted into the thin pipe 3. A coil 13 is wound around the thin pipe 3 to generate a magnetic field. Then, a magnetic thin rod 8 is inserted into the thin pipe 3 and the position of the rod 8 is moved from 8 to 8' on the basis of magnetic attraction. The moving distance D and the moving time are measured to measure the viscous characteristic of the non-newton fluid such as the viscosity, yield value and stress relaxation. Since the magnetic rod is electrically moved in the viscous solution, the viscous characteristics of the non-newton fluid can be easily measured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the viscosity of liquids, particularly the viscoelasticity, stress relaxation, yield value, etc. of non-Newtonian fluids such as nasal secretions, sputum, and other bodily fluids excreted from humans. Concerning how to measure behavior.

[Summary of the invention 1 The mucus to be measured is collected in a thin tube, a thin magnetic rod is inserted into the tube, the thin tube is held horizontally, and a constant current is applied to a coil surrounding the thin tube. The dynamic properties of the mucus (behavior of a non-Newtonian fluid, i.e., the viscoelasticity and yield value) are determined by measuring the distance that the magnetic bar moves through the mucus and the time it takes to start moving due to the magnetic attraction force generated in the coil.・Measure parameters corresponding to stress relaxation).

[Conventional technology 1 Conventional liquid viscosity measurement is based on the drop-body method, and the value is only a static property (viscosity as a Newtonian fluid), whereas fluids produced from living bodies such as nasal secretions and sputum are non-Newtonian fluids. , there was nothing to measure its dynamic properties (properties as a non-Newtonian fluid).

However, recent attention has been drawn to the fact that the properties of nasal discharge, sputum, etc. differ between healthy and diseased bodies, and it has become clear that the ingenious mechanisms of living organisms change their fluid properties depending on the disease state to promote natural healing effects. It has become.

Since the liquid produced by living organisms is a non-Newtonian fluid, if its properties can be easily measured as rheological characteristics, the data can be used as a basis for determining pathological conditions and therapeutic effects. It becomes possible.

[Problems to be Solved by the Invention] The present invention provides a method for easily measuring the dynamic characteristics of liquid viscosity from the standpoint of displaying non-Newtonian fluid ρ behavior.

In addition, the amount of nasal secretions, sputum, etc. normally discharged from the human body is small, and their properties change when they come in contact with air, so we provide a method for measuring non-Newtonian fluid properties that is possible even with a small amount of sample and without contact with air. It is something to do.

[Means for Solving the Problems 1] Fig. 1a shows the appearance of a device for collecting mucus to be measured (hereinafter referred to as a sample) used in the present invention. 1 is a collection needle for sample collection, 2 is a syringe for aspirating the sample, and for collection, the tip of the needle is inserted into the mucus to be measured, and by pulling the piston of the syringe, the mucus to be measured is aspirated into the needle. Ru.

FIG. 1b shows an enlarged view of the joint between the needle and the syringe barrel, and 4 is a joint metal tube. The inner diameter of the metal tube 4 is smaller than that of the thin tube 3 in the needle portion, so that the sample suction increases rapidly, so that the required amount of sample can be easily determined.

Figure 2 shows the sample (6) being aspirated into the collection needle. Aero vine and electrode rod to prevent sample leakage after suction (
7) is inserted into the joint.

After aspirating the sample, the tip of the needle is cut and the thin tube (3) is used for measurement.

FIG. 3 shows a method for measuring the rheological dynamic properties (comprehensive properties of viscoelasticity + stress relaxation yield value) of a liquid using the magnetic attraction method.

FIG. 3a shows a state in which the entire storage section of FIG. 3 is laid down.

A coil (13) is wound inside the storage part (9) so as to surround the thin tube (3), and both terminals (C and d) of the coil are wound around the thin tube (3).
) When a pre-charged charge is added to a capacitor in a suitable container, the capacitor discharges in a short period of time, and the magnetic force generated by the sudden current causes the thin rod (8) made of magnetic material to move in the direction of the arrow toward the sample. It moves by suction against its viscoelasticity and yield value. When it stops, it moves back slightly due to the action of stress relaxation, but by measuring the moving distance (D) of the thin rod (8) when it is completely stopped as shown in Figure 3b, the distance can be determined by viscoelasticity. , can be seen as a comprehensive index of yield value and stress relaxation.

In FIG. 4, dynamic viscosity characteristics can be measured under various conditions by switching and using capacitors of various capacities in a measuring circuit.

[Effects of the Invention] As described above, the device of the present invention has the following features.

1) Can be measured with a small amount of sample.

2) Can be measured without coming into contact with the atmosphere.

3) Comprehensive characteristics of dynamic viscosity characteristics such as viscoelasticity, stress relaxation, and yield value can be seen.

4) Dynamic characteristics under various conditions can be determined by changing the current direction and current value (capacitor capacity) in the same sample.

5) Easy to operate because it uses magnetic attraction.

6) Simple structure.

7) Effective as clinical data in internal medicine, otorhinolaryngology, etc.

[Brief explanation of the drawing]

FIG. 1 shows a sample collection device used in the present invention, and FIG. 2 shows the state in which the sample is collected. FIG. 3 shows a method for measuring liquid dynamic viscosity characteristics using the magnetic attraction method of the present invention. FIG. 4 shows a measurement circuit diagram. 1... Thin tube for sample collection, 7... Air lock/extrusion rod, 8... Magnetic rod, 13... Coil. ``jtan! Goushi fake person 100 sho 4 hiki drawing clean cloud (no change in word r'1) No. 0 Figure 1b Figure IIz engraving on both sides (no change in content Figure 30 Figure 3b procedural amendment Written format) % formula % 1. Indication of the case Patent Application No. 2122 of 1985 2. Name of the invention Method for measuring mucus properties of non-Newtonian fluids by magnetic attraction method 3. [Relationship with the person who makes the right case] Patent Applicant address 8464 Sun Mansion C2-201 Higashiyama Motomachi, Chikusa-ku, Nagoya, Aichi Prefecture 4. Date of amendment order 6 April 10, 1985 5. Drawings subject to amendment (No. 1, 2. Figure 3) 6. Contents of correction

Claims (1)

[Claims] The liquid to be measured is collected into a thin tube (3), a rod (8) made of a magnetic material is inserted into the thin tube, and a magnetic field is generated by a current flowing through a coil wound around the tube for a certain period of time. , a method for measuring the behavior of non-Newtonian fluids such as viscoelasticity, yield value, stress relaxation, etc. by moving the rod by attraction (or repulsion) and measuring the distance it moves and the time it takes to start moving.