WO2003100387A1

WO2003100387A1 - Device for measuring stringiness of liquid material and stringiness measuring method

Info

Publication number: WO2003100387A1
Application number: PCT/JP2003/006544
Authority: WO
Inventors: Tatsuji Nishihara; Yasuaki Kakinoki; Hiroshi Kamei; Kiyomitsu Ishikawa
Original assignee: Kitakyushu Foundation For The Advancement Of Industry, Science And Technology; Kabushikikaisha Ishikawa Ironworks Co. Ltd.
Priority date: 2002-05-24
Filing date: 2003-05-26
Publication date: 2003-12-04
Also published as: AU2003241768A1; JP2005345103A; AU2003241768A8

Abstract

A device for measuring the stringiness of a liquid material capable of measuring the stringiness of a sample in an amount as small as possible, digital measuring, automatic measuring, eliminating individual differences in measurements that might be caused by measuring persons, and measuring independently of whether a sample is electrically conductive or not; and a stringiness measuring method using the device. The device for measuring the stringiness of a liquid material comprises a sample receiving dish for accommodating a liquid to be detected, a stringing rod being in contact at the lower end thereof with the liquid to be detected in the receiving dish to function to detect the stringing length of the liquid to be detected when lifted, a stringing rod lifting means for vertically moving the rod at a specified speed, and an optical detection means for detecting the measurement starting point of the liquid to be detected and the height-direction position at breaking of the liquid to be detected in a stringy condition; and a stringiness measuring method using the device.

Description

PC Jojo ₅₄₄

-1-Description Liquid string spinnability measuring device and spinnability measuring method

The present invention relates to various body fluids such as saliva, blood, lymph fluid, synovial fluid, and urine in the medical field, inks, paints, oils, greases, and the like in the industrial field, soy sauce, sauces, mayonnaise, ketchup, dressing, dairy products, and kneaded products in the food field. The present invention relates to an apparatus and a method for measuring spinnability as a viscosity parameter of a liquid material or a viscous fluid (hereinafter, referred to as a liquid material) including various gels, colloids, and slurries such as soups. n.

For example, in the medical field, there is a correlation between the viscosity of human saliva and the degree of mental and physical fatigue, and it is known that the viscosity of saliva increases as the degree of fatigue increases. The necessity of examining the physical properties of saliva has been recognized. At that time, it was difficult to collect large amounts of saliva from patients with dry mouth.

As a means of measuring the viscosity of saliva, for example, using a cone-plate rotary viscometer, a sample of saliva at 25 ° C is used to measure the shear stress value (viscosity: mPa · s unit) after a certain period of rotation. There is a way to do that. However, it is not widely used due to problems such as temperature control of samples and price of measuring equipment. On the other hand, there is also a viscosity measurement method using a slope plate. In this method, a certain amount of saliva is dropped on the slope plate, and the angle of the saliva starts to flow by gradually increasing the angle of the slope plate, or the saliva is kept constant and the saliva is inclined. It measures the flow length by hanging it up, but it has not been generalized due to the problem of evaluating the surface properties and angle of the slope plate and requiring a large amount of saliva. Easy and accurate measurement of the viscosity of various liquids handled in the medical, industrial, and food fields, as well as in the measurement of physical properties of saliva A means of measuring was strongly desired.

[Problems to be solved by the invention]

As a means for measuring the viscosity of a liquid material, there is a method that utilizes the spinnability of the liquid material, measures the stringing length of the liquid material, and uses the measured value as a parameter of the viscosity. In this method, the tip of a rod is visually brought into contact with a liquid material, and the rod is pulled upward to measure the stringing length of the liquid material at that time. However, whether or not the rod came into contact with the liquid material as the subject relied on human visual judgment. In addition, since the determination of the moment when the stringing of the liquid material was broken also relied on humans, there was a problem that the measured values had considerable individual differences and errors. Therefore, the present inventors, in Japanese Patent Application No. 2001-114, use the conductivity of a liquid material, and apply a force between the sample pan and the stringing rod at the moment when the stringing of the liquid material is broken. An apparatus and method for detecting a change in the applied voltage and for measuring the length of the thread of the liquid material based on the detection signal were proposed. However, there has been a problem that liquid materials having no conductivity cannot be targeted. According to the present invention, (1) the spinnability of a liquid material can be measured with a sample as small as possible. ② Digital measurement is possible. (3) Automatic measurement is possible, and individual differences in measurement results can be eliminated. (4) The spinnability of a liquid material can be measured regardless of whether the liquid material as a sample has conductivity. It is intended to provide a means for measuring the spinnability of a liquid material. Another object of the present invention is to provide various body fluids such as saliva, blood, lymph, synovial fluid, and urine, inks, paints, oils, greases, and the like in the industrial field, soy sauce, sauces, mayonnaise, kechiap, dressing, and the like in the food field. As the spinning parameters of liquids containing various gels, colloids, and slurries such as dairy products, pastes, and slurries, the chemical composition of the test liquid, the chemical conditions such as pH, and the temperature An object of the present invention is to provide an apparatus for measuring the physical properties of a liquid under test conditions that specify physical conditions and a method using the same. Disclosure of the invention

The invention according to claim 1 for solving the above-mentioned problem is characterized in that a sample pan for accommodating a test liquid, a lower end portion of the sample pan in contact with the test liquid in the sample pan, and the liquid rises. Therefore, a stringing rod that functions to detect the stringing length of the test liquid, a stringer raising / lowering means that moves the stringing rod up and down at a predetermined speed, and a measurement of the stringing length of the sample liquid. An optical means for confirming the position at the start time and at the time of cutting of the spinning test liquid material. According to the present invention, the spinnability of a liquid material can be measured regardless of whether or not the liquid material as a sample has conductivity.

The invention according to claim 2 is characterized in that the optical means for confirming the position at the time of starting the measurement of the thread length of the test liquid and the time of cutting the spine-like test liquid are based on the vertical direction of the stringing rod. The invention is a liquid material spinnability measuring device according to claim 1, which is a light projector that emits light in a crossing direction and at least one optical sensor that receives light from the light projector. 3. The spinnability of a liquid material according to claim 1 or claim 2, wherein a position adjusting means in the elevating direction of the stringing rod is attached to one or both of the sample pan and the optical sensor. It is a measuring device. According to the present invention, the ridge of the sample (test liquid) in the sample pan can be detected with high accuracy at every measurement, so that the spinning property of the liquid is measured with higher accuracy. be able to.

In the invention according to claim 4, the optical means for confirming the positions of the start of the measurement of the thread length of the test liquid and the cutting time of the test liquid in the form of a string is provided by an error sensor or an image processing device. 2. A device for measuring the spinnability of a liquid material according to claim 1. According to a fifth aspect of the present invention, there is provided a sample pan for accommodating a test liquid, and a lower end portion of the sample pan in contact with the test liquid in the sample pan, and the rise of the lower end detects the thread length of the test liquid. A stringer which functions smoothly, a stringer raising / lowering means for raising and lowering the stringer at a predetermined speed, a time point at which the measurement of the string length of the test liquid is started, and a cutting of the string-like test liquid This is a device for measuring the spinnability of liquids, provided with a load measuring device that detects a change in the force applied to the stringing rod or the sample pan at the time.

In the invention according to claim 6, the lower end of the stringing rod has a flat shape and a convex spherical surface. Shape, convex cone shape, convex pyramid shape, convex pyramid shape with spherical tip, concave spherical shape, concave circular cone shape, concave pyramid shape, convex stripe or groove extending in a straight line in the diameter direction, and straight The spinnability measuring device for a liquid material according to any one of claims 1 to 5, wherein the device is any one of a ridge or a groove extending radially in a cross shape. ADVANTAGE OF THE INVENTION According to this invention, the lowering of the stringing rod lower end part can be prevented from lowering the measuring accuracy of the liquid material's stringing property due to the deviation from the center of the cross section of the stringing rod at the top of the test liquid. . The invention according to claim 7 is the apparatus for measuring the spinnability of a liquid material according to any one of claims 1 to 6, wherein the sample pan is a cylindrical strip having an upper flat surface. The invention according to claim 8 is the one in which the stringing rod is provided with a scooping hook at the lower end thereof, the scooping hook having a function of scooping up and raising the test liquid in the sample pan. An apparatus for measuring the spinnability of a liquid material according to any one of claims 1 to 7. According to the present invention, when the viscosity and elasticity of the sample are relatively high, the surface tension is large, the sample is difficult to adhere to the sample pan with a certain strength, and the adhesiveness is poor, and the liquid material having high fluidity is used. The spinnability can be accurately measured. The invention according to claim 9 is characterized in that the sample pan is provided with a sample holder that functions to prevent the whole of the test liquid from being lifted. Is a spinnability measuring device.

According to a tenth aspect of the present invention, there is provided a sample pan for accommodating a test liquid, and any one of a tube, a slit, and an orifice formed at a lower end thereof, and the tube, the slit, And a orifice, which has a sample pot that allows the liquid to flow down from the orifice and functions to detect the thread length of the liquid to be tested. A stringing rod to be measured; a stringing rod elevating means for gripping the holder and moving the stringing rod up and down at a predetermined speed; and It is an apparatus for measuring the spinnability of a liquid material, comprising an optical means for confirming the position at the time of cutting the material. According to this invention, the sample is relatively viscous and elastic, the surface tension is large, the sample is difficult to adhere to the sample pan with constant strength, and the adhesiveness is poor, and the liquid with high fluidity It is possible to accurately measure the spinnability of an object. The invention according to claim 11 has a sample pan for containing a test liquid, and an outflow hole for allowing the test liquid to flow down from a lower end of the sample pan by rising from the sample pan. A threading bar that functions to detect the length of the thread and is slidably and vertically slidably inserted into a holder having an insertion hole, and a thread that grips the holder and moves the threading bar up and down at a predetermined speed. It is a device for measuring the spinnability of a liquid material, comprising a towbar elevating means and optical means for confirming the position of the start of the measurement of the length of the thread of the test liquid and the cutting time of the test liquid. .

According to the invention described in claim 12, the stringer is lowered at a given speed toward the test liquid in the sample pan, and the light passing just above the top of the test liquid in the sample pan. When the lower end of the threading rod interrupts the shaft, the lowering of the threading rod is stopped, and the lower end of the threading rod is brought into contact with the liquid to be tested. Thereafter, the threading rod is raised. The test liquid is put into a spinning state, the test liquid in the spinning state is cut, the test liquid returns to the sample pan, and the optical axis passing just above the top of the test liquid in the sample pan is This is a method for measuring the spinnability of a liquid material, which measures the amount of upward displacement of a stringer until it is detected by a light receiver.

According to the invention described in claim 13, the stringer is lowered at a given speed in a direction directed toward the test liquid in the sample pan, and the light passing directly above the top of the test liquid in the sample pan is received. When the lower end of the threading rod interrupts the shaft, the lowering of the threading rod is stopped, and the lower end of the threading rod is brought into contact with the liquid to be tested. Thereafter, the threading rod is raised. The test liquid is set in a spinning state, the test liquid in the spinning state is cut, and one of the optical axes of the upper optical sensors arranged in a plurality of upper and lower directions is detected by a light receiver. This is a method of measuring the spinnability of a liquid material, which measures the amount of upward displacement of a stringing rod until it is detected.

In the invention according to claim 14, prior to the measurement of the spinnability of the test liquid, the holder on which the stringing rod is mounted is lowered for a certain distance, and then is raised for a certain distance, and then the position is increased. The spinnability measurement method for a liquid material according to claim 12 or claim 13, wherein feedback control is performed so as to attain a lowering and increasing speed of the application. The invention according to claim 15 is characterized in that, prior to the measurement of the spinnability of the test liquid, the stringing rod is lowered to bring the lower end portion into contact with the test liquid to be in a wet state. A method for measuring the spinnability of a liquid material according to any one of claims 2 to 14. According to the present invention, it is possible to eliminate the dispersion of measured values due to the surface properties of the lower end of the stringing rod when performing repeated measurements.

In the invention according to claim 16, a fixed amount of the test liquid is stored in the sample pot while any one of the tube, slit, and orifice at the lower end of the sample pot is in contact with the sample pan. Next, raise the stringing rod provided with the sample jar to let the sample liquid flow down from one of the tube, slit, and orifice at the lower end of the sample jar, and the tip of the sample liquid flowing down is interrupted. This is a method for measuring the spinnability of a liquid material, which measures the spinning length until a droplet is formed.

The invention according to claim 17 is to store a fixed amount of the test liquid in the sample container while any one of the tube, slit, and orifice at the lower end of the sample container is in contact with the sample pan. Then, raise the stringing rod provided with the sample jar and let the sample liquid flow down from one of the tube, slit, and orifice at the lower end of the sample jar, and the sample liquid in the sample jar is removed. This is a method for measuring the spinnability of a liquid material, which measures the time until the spill is completed.

The invention according to claim 18 is characterized in that the spinning length of the test liquid in the first measurement is a reference value, and the time or the number of measurements until the spinning length reaches a certain ratio of the reference value is determined. This is a method for measuring the spinnability of a liquid material to be detected. According to the present invention, it is possible to measure the coagulability of the liquid material with the spinnability of the test liquid material as a parameter.

The invention according to claim 19 is characterized in that the threading property of the test liquid in the sample pan is repeatedly measured by setting the rising distance of the stringing rod to a constant value within a limit at which the test liquid does not cut, and This is a method for measuring the spinnability of a liquid material in which the time or the number of measurements until the test liquid material is cut within the lifting distance of the stringing rod is detected. Also in the case of this invention, it is possible to measure the coagulability of the liquid material by setting the spinnability of the test liquid material as a parameter. The invention according to claim 20 is a spinning line for a liquid material, wherein the stringing rod is lifted up from the sample pan for a fixed distance and held in that state, and a change with time in the electrical conductivity of the test liquid material is detected. It is a method of measuring sex. According to the present invention, the volatility of the liquid material can be measured with the spinnability of the test liquid material as a parameter. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic view showing an apparatus for measuring the spinnability of a liquid material according to one embodiment of the present invention.

FIG. 2 shows a sample tray, a sample, a stringer, and a light at the start of measurement when measuring the spinning length of a liquid using the liquid spinnability measuring device according to one embodiment of the present invention. It is a front view showing the position of axis oa.

FIG. 3 is a front view showing a state in which the stringer has descended and its lower end has come into contact with the sample.

FIG. 4 is a front view showing the spinning state of the test liquid (sample).

Fig. 5 is a front view showing the state at the moment when the sample in the spinning state is cut.o

FIG. 6 is a front view showing a state in which the sample has been restored to the sample pan after cutting. FIG. 7 is a front view showing an example of the arrangement of the optical sensor according to another embodiment of the present invention.

FIG. 8 is a front view showing another example of the shape of the lower end portion of the stringing rod in the liquid matter stringiness measuring device of the present invention.

FIG. 9 is a front view showing another embodiment of the sample tray in the liquid spinnability measuring device of the present invention.

FIG. 10 is a front view showing an embodiment of a sample scooping hook portion attached to the lower end of a stringing rod in the liquid matter spinnability measuring device of the present invention.

FIG. 11 is a front view showing an embodiment of a sample pot attached to the lower end of a stringing rod in the liquid matter stringiness measuring device of the present invention.

FIG. 12 shows a sample flow-through type yarn in the liquid matter spinnability measuring device of the present invention. It is a front view which shows one Example of a tow bar.

FIG. 13 is a graph showing the correspondence between the measurement results obtained by the liquid material spinnability measuring device and spinnability measuring method of the present invention and the measured values measured by a single cylinder gauge.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described based on preferred embodiments.

The present invention defines the chemical composition of the test liquid, the chemical conditions such as pH, and physical conditions such as temperature, and determines the spinnability of the test liquid by measuring the spinning length, load, and measurement. It measures the time or the number of measurements in the change of the value over time, the electrical conductivity, and the measurement parameter. In addition, for example, when the patient feels that the saliva is sticky, the physical properties of the test liquid such as saliva and the coagulable test liquid such as blood are measured for spinnability. By performing relative measurements between test liquids (samples), it can be used for diagnosis of human health, quality control in the industrial and food fields, and development of new products for development. It can be. In addition, the spinnability of the test liquid is measured as the development of viscosity, elasticity, and viscoelasticity.

Example 1

FIG. 1 shows an apparatus for measuring the spinnability of a liquid material according to one embodiment of the present invention. 2 to 6 show a spinnability measuring process according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a motor for rotating a vertically moving screw shaft 3 through a gear train 2. Reference numeral 4 denotes an elevating table, in which an internal female screw is screwed with the elevating screw shaft 3, and the elevating table is moved up and down by forward and reverse rotation of the elevating screw shaft 3. In this embodiment, the lifting table 4 moves up and down within a speed range of 5 mm / s to 2 Omm / s. Reference numeral 5 denotes a holder, which is fixed to the elevating table 4 and has a stringer 6 detachably fitted thereto. The motor 1, the gear train 2, the lifting screw shaft 3, the lifting table 4, the holder 5, and the rotation speed control system of the motor 1 constitute lifting means of the stringing rod 6. The lower end of the stringing rod 6 comes into contact with the test liquid (sample) 8, and functions to detect the stringing length until the sample comes into a stringing state and is cut. According to the knowledge of the inventors, the lower end of the stringing rod 6 is preferably wetted with the sample prior to the measurement of the stringing length of the test liquid (sample) 8. It is preferable for a high-precision measurement of the spinnability that the peak of the swelling due to the surface tension of the sample in a wet state exists in the center of the cross section of the lower end of the stringing rod 6. Thus, the lower end of the stringing rod 6 can be flat, convex spherical, convex conical, convex pyramid, convex pyramid having a spherical tip, concave spherical, concave cone, concave pyramid. Alternatively, as shown in FIG. 8, it is preferable to use any one of a convex ridge or a concave groove extending in a diametrical direction and a convex ridge or a concave groove extending in a diametrical direction.

Reference numeral 7 denotes a sample receiving tray, which is formed with a shallow cylindrical or inverted truncated cone-shaped concave portion, into which a predetermined amount of a test liquid (sample) 8 is charged. The sample pan 7 is made of, for example, stainless steel. By making the vertical cross-sectional shape of the sample pan 7 a shallow cylindrical or inverted truncated conical recess, the position of the sample 8 on the plane of the sample pan 7 can be prevented from shifting, and the peak of the bulge due to the surface tension of the sample 8 can be prevented. Is located at the center of the plane, enabling high-precision measurement and facilitating visual judgment of the sample 8 capacity. As the sample pan 7, as shown in FIG. 9, a columnar shape having an upper flat surface can be used.

Reference numeral 9 denotes a light emitter and 10 denotes a light receiver. The pair of signal processing systems constitute a transmission type optical sensor. In this embodiment, as shown in FIG. 2, a pair of a projector 9 and a receiver are arranged so that an optical axis oa (optical axis) passes directly above a test liquid (sample) 8 in a sample pan 7. 10 is provided. In this embodiment, a transmission type optical sensor having a sensing ability capable of detecting an object of 0.01 mm (10 zm) is used.

Reference numeral 1 denotes an emitter / receiver mounting base, which supports the emitter 9 and the receiver 10. In this embodiment, the transmitter / receiver mounting base 11 is screwed into the optical axis position fine adjustment screw 12, and the transmission type optical sensor is highly precisely controlled by the rotation of the optical axis position fine adjustment screw 12. The sensor is raised and lowered, and the position of the optical axis oa in the height direction is adjusted. The position adjustment of the optical axis oa in the height direction can be performed by means for raising and lowering one or both of the emitter / receiver mounting base 11 supporting the optical sensor unit and the sample tray 7.

Reference numeral 13 denotes a motor drive circuit, which receives an output signal from the operation circuit 14 and drives the lift table 4 to which the holder 5 is fixed in the motor direction 1 in the ascending or descending direction. Turn on the power. The motor 13 and the drive circuit 13 are also operated via the operation circuit 14 by a signal from the towing length measuring circuit 15 and cut off the power to the motor 11. Further, the motor drive circuit 13 is activated by signals from the upper limiter 18 and the lower limit 19 to cut off the power to the motor 11. The operation circuit 14 is provided with a drive switch for driving the elevating table 4 to which the holder 5 is fixed in an ascending or descending direction.

Reference numeral 16 denotes an arithmetic circuit. In this embodiment, a feedback (feedback) control system for controlling the rotation speed of the motor 1 is formed, and a signal from the thread length measuring circuit 15 is used. Calculates the amount of displacement of the stringing rod 6 from when the stringing rod 6 starts to rise and the sample 8 in the stringing state is cut, and functions to display it on the digital display 17 .

According to the findings of the inventors, in the measurement of the spinnability of the sample 8, the ascending speed of the stringing rod 6 greatly affects the measurement accuracy. Therefore, in the present invention, as described above, the feedback (feed knock) control system for controlling the rotation speed of the motor 11 is incorporated in the liquid material spinnability measuring device. This feedback control system is configured as follows in this embodiment. That is, an infrared ray is projected from a retroreflective photoinjector onto a reflecting disk 20 having black-and-white contrast formed at predetermined intervals in the circumferential direction of the outer peripheral surface, and reflected infrared light from a white portion of the reflecting disk 20 is reflected. This pulse is regarded as an idle-back pulse, and the number of pulses per time is input to the arithmetic circuit 16, and if there is a deviation from the rotation speed target value of the motor 1 which gives the given lifting speed to the holder 5, the deviation is detected To change the ON-OFF width ratio in the input pulse to motor 1 Leakage 44

-11-dulation) Pulse 23 is input to the motor 1 via the motor drive circuit 13. That is, the speed control of the pulse width modulation method is performed.

Next, the operation of the liquid matter spinnability measuring device of the first embodiment will be described. In the present invention, prior to the measurement of the spinnability of the sample 8, the rotation speed control of each of the individual spinnability measuring devices is performed by the feedback control system described above, so that the holder 5 Is calibrated to be displaced at a given lifting speed. This solves the problem that the time required for the lifting / lowering speed of the holder 5 to stabilize to a given value varies due to voltage fluctuations, individual differences between motors, sliding resistance of rotating parts, etc. To do so.

That is, the test liquid (sample) 8 is charged in the sample receiving tray 7 in advance, the holder 5 is lowered until the lower end of the stringing rod 6 comes into contact with the sample 8, and then the constant displacement Increase the amount. In this process, the feedback control is performed to make the elevating speed of the holder 5 converge to a given target value. After carrying out calibration for each spinnability measuring device, the spinnability of the test liquid (sample) 8 is measured.

During the calibration process, the lower end of the stringing rod 6 becomes wet because the lower end of the stringing rod 6 is in the sample pan 7 when measuring the actual stringiness. When it comes into contact with 8, it becomes a fusion state, and it is possible to eliminate the dispersion of measured values caused by the surface properties of the lower end of the stringing rod 6.

Using the apparatus for measuring the spinnability of a liquid that has been calibrated, load the test liquid (sample) 8 into the sample pan 7. Next, as shown in FIG. 2, the sample pan 7 or the transmission type optical sensor 1 is moved up and down to determine whether or not the optical axis oa is transmitted. The optical sensor is set by the optical axis position adjusting screw 12 so that the optical axis oa passes horizontally at a position about 10 zm higher than that position in the height direction.

In this state, as shown in Fig. 3, when the line puller 6 is lowered and its lower end cuts off the optical axis oa (light blocking detection), a lowering stop signal of the line puller 6 is output. Then, the motor 1 is stopped via the thread length measuring circuit 15, the operating circuit 14, and the motor driving circuit 13. The stringing rod 6 descends until it comes into contact with the sample 8 even after the light sensor 1 detects light shielding. In this state, the motor 1 is driven to rotate in the direction in which the stringer 6 rises, and as shown in FIG. 4, the stringer 6 is raised at a given rising speed, and the test liquid (Sample) 8 is in the spinning state. As shown in Fig. 4, the optical axis oa is shut off by the test liquid (sample) 8 in the spinning state.

The stretched sample 8 is cut when the string length corresponding to the viscosity is reached, as shown in FIG. After cutting, the sample 8 returns to the sample pan 7 instantaneously as shown in FIG. 6, and the optical axis o a is again transmitted. The amount of upward displacement of the stringing rod 6 from the interruption of the optical axis oa to the moment when the photodetector 10 outputs a light detection signal again depends on the stringing length of the test liquid (sample) 8 (viscosity parameter). Overnight).

In this embodiment, according to the viscosity of the test liquid (sample) 8, there is a difference in the time from the moment when the stringing state is cut to the time when the sample 8 returns to the restored state as shown in FIG. In consideration of the fact that there is a certain amount of time from the moment when the threading state is cut to the time when the stringing state returns to the restored state corresponding to the viscosity of various samples by experiments in advance, (Sample) Correction is made by software for each liquid quality and viscosity of 8.

Thus, the light-blocking detection signal of the optical sensor 1 and the signal of the optical receiver 10 detecting the optical axis oa again pass through the thread length measuring circuit 15 and the corresponding motor 1 is driven. An N-OFF signal is input to the arithmetic circuit 16 via the motor drive circuit 13 via the motor drive circuit 13 and the motor from when the light sensor 1 detects light blocking to when the light receiver 10 detects the optical axis oa again. The number of rotations (number of pulses) per night is counted, and this is converted (calculated) into the amount of upward displacement of the stringing rod 6 and output to the digital display 17.

Example 2

When the test liquid (sample) 8 is a gel-like highly viscous material, it is difficult to recover from the cutting of the sample 8 in the string state to the state before the start of measurement as shown in Fig. 6. Or the variation is large. In such a case, it is necessary to directly detect the position of the moment of cutting of the sample 8 in the spinning state.

Therefore, in this embodiment, as shown in FIGS. 1 and 7, a plurality of optical sensors 1 are arranged in the elongating (height) direction of the sample 8, and the cutting position ( Height) can be detected directly. Initial state of spinnability measurement (After confirming the position of the top of liquid sample (sample) 8 in sample pan 7, the optical sensor (base point optical sensor) is set so that optical axis oa passes about one part above. The distance between the upper optical sensor that detected the optical axis oa of the plurality of optical sensors installed and the base optical sensor after ascending the stringer 6 from the light blocking detection of the base optical sensor Is the spinning length of Sample 8. The number of optical sensors disposed above the base optical sensor and the position in the height direction may be determined in accordance with the physical properties of the target liquid material (sample) 8 to be measured.

Example 3

In the embodiments described so far, the liquid material (sample) 8 at the top of the sample 8 at the start of the measurement of the string length and the height direction at the time of cutting of the sample 8 in the state of the string are measured. This is an embodiment in which the optical detection means for confirming the position is a transmission type optical sensor. However, the present invention is not limited to this, and the cutting of the sample 8 in the state at the start of the spinning property measurement of the liquid material and the spinning state using an area sensor, for example, a CCD camera, a laser, and a sensor, is performed. Optical detection means for confirming the position in the height direction at the time can also be employed. Further, an optical detection means for confirming the position in the height direction at the time of the start of the measurement of the spinnability of the liquid material and the time of the cutting of the sample 8 in the spinning state, using an image processing means, may be employed.

Example 4

In the above-described embodiment of the liquid material spinnability measuring apparatus and the spinnability measuring method using the same according to the present invention, the optical detection means detects the start time and the spinning state of the liquid material spinnability measurement. The position of the sample 8 in the height direction at the time of cutting was confirmed. However, in the present invention, as the confirmation means, a load measuring device that senses a small load variation on the sample pan 7 or the stringing rod 6 is described. For example, a load measuring device with a high resolution, such as an electronic balance, is installed, and the load change at the moment the stringer 6 comes into contact with the sample 8 and the cutting time of the sample 8 in the stringing state is 0.1 mg unit. The detection signal can be used as a digital processing signal.

The method for measuring the spinnability of a liquid material in the above-described embodiment is as follows. The lower end of the stringing rod 6 is wetted in advance, and the spinning length up to the cutting of the test liquid material (sample) 8 in the spinning state. Wet measurement is repeated several times to extract the average value and distribution state in the sample group, etc., and the stringing rod 6 is dry without wetting the lower end with the test liquid (sample) 8. There is a dry test method in which the thread length is measured once as a condition. The gate test method is suitable for measuring a test liquid (sample) 8 having viscosity, elasticity, surface tension, and adhesive strength to some extent. The dry test method is suitable for measuring test liquids (samples) 8 having high adhesive strength and low elasticity.

Example 5

FIG. 10 shows an apparatus for measuring the spinnability of a liquid material according to another embodiment of the present invention. 1 to 7 are the same components. The stringer 26 in this embodiment has a scooping hook 36 at the lower end thereof. The tip of the scooping hook portion 36 is inserted into the test liquid (sample) 8 in the sample pan 7, and a predetermined amount of the sample 8 is scooped up by the raising of the stringing rod 26 to form a string. It functions to measure the length of the string until the cutting of a certain sample 8. The device for measuring the spinnability of a liquid material according to this embodiment is suitable for measuring a liquid material (sample) 8 having low viscosity, elasticity, viscoelasticity, surface tension, and tackiness and high fluidity. ing. In FIG. 10, reference numeral 101 denotes a sample holder, which has a forked flat shape and is fixed to the sample pan 7. The sample holder 101 prevents the entire amount of the test liquid (sample) 8 from being lifted by the scooping hook 36. The cross-sectional shape of the tip of the scooping hook 3 6 can be appropriately selected according to the physical properties of the test liquid (sample) 8 such as an inverted triangle, a square, a circle, and a spun shape. Example 6

FIG. 11 shows an apparatus for measuring the spinnability of a liquid material according to another embodiment of the present invention. 1 to 7 are the same components. In this embodiment, the test liquid (sample) 8 flows down from one of the tube 481, the slit 482, and the orifice 483 formed at the lower end of the sample # 48. In the method for measuring the spinnability of the liquid material in this example, one of the tube 481, the slit 482, and the orifice 483 at the lower end of the sample pot 48 is brought into contact with the bottom surface of the sample pan 7 in advance. Inject a predetermined amount of the test liquid (sample) 8 into the sample jar 48, or close one of the tube 481, slit 482, and orifice 483 with a thin rod. A predetermined amount of the test liquid (sample) 8 is injected into the sample pot 48, and opened at the same time as the measurement is started, and the stringer 6 is lifted to raise the string 8 in the height direction at the time of cutting. The position is detected by optical detection means. The apparatus for measuring the spinnability of a liquid material according to this embodiment and the method for measuring the spinnability include a test liquid (sample) 8 having low viscosity, elasticity, viscoelasticity, surface tension, and low adhesiveness and high fluidity. Suitable for measurement. This test method is called a flow test method.

Example 7

FIG. 12 shows an apparatus for measuring the spinnability of a liquid material according to another embodiment of the present invention. 1 to 7 are the same components. In this embodiment, the test liquid (sample) 8 flows down from an outflow hole 361 formed at the center of the cross section of the stringing rod 6 and having an opening at the lower end. The test liquid (sample) 8 is stored by the syringe 48 or the spike 48. The method of measuring the spinnability in this example is as follows. A predetermined amount of the test liquid (sample) 8 is stored by bringing the opening of the outflow hole 36 1 into contact with the inner bottom surface of the sample pan 7 in advance. Simultaneously with the start, the piston or spoiler of the syringe is opened, the stringing rod 6 is raised, and the position of the sample 8 in the stringing state in the height direction at the time of cutting is detected by optical detection means. The liquid material spinnability measuring device and the spinnability measuring method according to this embodiment are also low in viscosity, elasticity, viscoelasticity, surface tension, and tackiness, and have high fluidity. 8 is suitable for measurement. This test method is also an embodiment of the Fuchi-one test method.

Example 8

Using the spinnability measuring apparatus shown in FIGS. 1 to 12, the measurement of the stringing length of the test liquid (sample) 8 is repeated a plurality of times, and the amount of change in the stringing length is measured. Using the result of the first measurement as the reference value, the time until the stringing length reaches a certain percentage of the reference value, for example, 50% or the number of measurements is determined as the coagulation parameter of the test liquid (sample) 8. I do.

Example 9

Using the spinnability measuring device shown in Fig. 1 to Fig. 12, a certain length is set within the limit where the test liquid (sample) 8 is not cut, and the stringer 6 is repeatedly moved up and down within that range. Then, the time until cutting of the sample 8 in the spinning state or the number of repetitions of ascending and descending is detected, and this is regarded as a parameter of the coagulability of the test liquid (sample) 8.

Example 10

Using the spinnability measuring device shown in Fig. 1 to Fig. 12, a certain length is set within the limit where the test liquid (sample) 8 is not cut, and the stringing rod 6 is raised and held within that range. Then, the electrical conductivity of the test liquid (sample) 8 is measured with time. This measured value is used as the volatile parameter of the test liquid (sample) 8. When performing this measurement, it is necessary to add a device for applying a voltage between the stringer 6 and the sample pan 7.

The apparatus for measuring the spinnability of a liquid material of the present invention and the method for measuring the spinnability using the same are carried out as described above. Temperature, humidity, temperature of the test liquid (sample), surface properties (surface roughness, etc.) of the portion of the stringer in contact with the sample, size and shape of the stringer, speed of stringer rise, etc. It is. It is necessary to comprehensively judge and standardize these factors corresponding to the test liquid (sample).

FIG. 13 shows the measurement of the liquid material according to the present invention by the spinnability measuring apparatus and spinnability measuring method. 6544

-17-Shows the correspondence between the measurement result and the actual value measured by the cylinder gauge. As is evident from Figure 13, it shows a very good correspondence.

The liquid substances which can be targeted by the spinnability measuring device and spinnability measuring method of the present invention include liquid substances in the medical field such as saliva, urine, nasal discharge, and sputum, as well as oils, fats, inks, and paints in addition to saliva. Liquids in the food field, such as liquids, dressings, milk, etc., which are handled in Japan, as well as liquids and pastes that have a drawstring, such as gels and emulsions, can be targeted.

According to the invention described in claim 1, claim 2, claim 12, and claim 13, the viscosity of the liquid having spinnability is determined regardless of whether the liquid has conductivity. Measurement can be performed with high accuracy without causing individual differences among the measurers. Further, according to the spinnability measuring device and spinnability measuring method for a liquid material of the present invention, an automatic measurement can be performed with as small a sample as possible, and the measurement result is digitally displayed. Factors that tend to cause measurement errors, such as reading the position, can be eliminated. Furthermore, the stringer is detachably fitted to the holder, so that the assembly of the device is simple and the stringer can be easily cleaned.

According to the third aspect of the present invention, the swelling of the test liquid (sample) in the sample pan can be detected with high accuracy at every measurement, so that the spinnability of the liquid can be measured more accurately. Can be done higher.

According to the invention described in claim 4, it is possible to measure the spinnability of the liquid material by using an error sensor such as a CCD camera, a laser sensor, or the like, or an image processing technique.

According to the invention described in claim 5, the spinning property of the liquid material can be measured by attaching a load measuring device such as a load cell to the stringing rod and Z or the sample pan.

According to the invention as set forth in claim 6, it is possible to reduce the accuracy of measuring the spinnability of the liquid material due to the deviation of the top of the sample in which the lower end of the threading rod is in a wet state from the center of the cross section of the threading rod. Can be prevented.

According to the invention of claim 8, the viscosity and elasticity of the sample are relatively high, and In cases where the surface tension is large and the sample is difficult to adhere to the sample pan with a certain strength and the adhesiveness is poor, the spinnability of a liquid material with high fluidity can be accurately measured.

According to the inventions described in Claims 10, 11, 16, and 17, the viscosity and elasticity of the sample are relatively high, the surface tension is large, and the sample is fixed on the sample pan. It is possible to measure the spinnability of a liquid material with high fluidity even when it is difficult to adhere with low strength and has poor adhesion.

According to the invention of claim 14, it is possible to eliminate the dispersion of the measured value of the stringiness of the liquid material caused by the dispersion of the lifting speed of the stringing rod.

According to the invention as set forth in claim 15, it is possible to eliminate variations in the measured value of the stringiness of the liquid material due to the surface properties of the lower end of the stringing rod when performing repeated measurements.

According to the inventions of claims 18 and 19, the spinnability of the liquid material can be measured as a parameter to measure the coagulability of the liquid material.

According to the invention described in claim 20, the volatility of the liquid material can be measured by setting the spinnability of the liquid material as a parameter.

Claims

The scope of the claims

1. A sample pan for containing the test liquid, and a function for detecting the length of the thread of the test liquid by the rise of the lower end of the sample pan in contact with the test liquid in the sample pan. A stringing rod, a stringing rod elevating means for raising and lowering the stringing rod at a predetermined speed, and a position for starting a measurement of a string length of the test liquid and a time for cutting the string-like test liquid. An apparatus for measuring the spinnability of a liquid material, comprising: an optical means for confirming the spinnability.

2. The optical means for confirming the position of the start of the measurement of the thread length of the test liquid and the cutting time of the test liquid is a light emitter that emits light in a direction crossing the vertical direction of the stringer. The liquid stringiness measuring device according to claim 1, wherein the device is at least one optical sensor that receives light from the light emitter.

3. The liquid thread described in claim 1 or claim 2, wherein one or both of the sample pan and the optical sensor is provided with a position adjusting means in a direction in which the stringing rod is raised and lowered. Sex measurement device.

4. The optical device according to claim 1, wherein the optical means for confirming the positions of the start of the measurement of the thread length of the test liquid and the cutting time of the spin-like test liquid is an error sensor or an image processing device. Equipment for measuring the spinnability of objects.

■ 5. The sample pan for containing the test liquid, and the lower end of the sample pan in contact with the test liquid in the sample pan. A function of a stringing rod that functions, a stringing rod elevating means for moving the stringing rod up and down at a predetermined speed, and a stringing operation at the start of the measurement of the stringing length of the test liquid and the cutting of the test string. A stringiness measuring device for a liquid material, wherein a load measuring device for detecting a change in a force applied to a rod or a sample pan is provided on the stringing rod or the sample pan.

6. The lower end of the stringing rod is flat, convex spherical, convex conical, convex pyramid, convex pyramid with spherical tip, concave spherical, concave cone, concave pyramid, diameter square. The liquid according to any one of claims 1 to 5, which is one of a convex ridge or a concave groove extending in a single character direction in the direction and a convex ridge or a concave groove extending in a cross shape in the diameter direction. Spinnability measuring device.

7. The apparatus for measuring the spinnability of a liquid material according to any one of claims 1 to 6, wherein the sample pan is a cylindrical strip having an upper flat surface.

8. The stringing rod is provided with a scooping hook at the lower end thereof, which functions to scoop up and lift the test liquid in the sample pan at the lower end thereof. The apparatus for measuring the spinnability of a liquid material according to any one of the above.

9. The apparatus for measuring the spinnability of a liquid material according to any one of claims 1 to 8, wherein the sample pan is provided with a sample retainer that functions so as not to lift the entire test liquid material.

10. A sample pan that contains the test liquid and a tube, slit, or orifice formed at the lower end of the sample pan. When the sample pan is lifted from the sample pan, the sample is inspected from any of the tube, slit, and orifice.試料 A stringer that has a sample pot that allows the liquid to flow down and functions to detect the length of the thread of the test liquid. A rod; a stringing rod elevating means for gripping the holder and elevating and lowering the stringing rod at a predetermined speed; and a point in time at which the measurement of the string length of the test liquid is started and a point in time when the string-like liquid is cut. An optical device for confirming the position of a liquid material, the device for measuring the spinnability of a liquid material.

1 1. A sample pan for containing the test liquid, and an outflow hole for letting the test liquid flow down from the lower end of the sample pan by ascending from the sample pan to detect the thread length of the test liquid. A thread puller bar that is slidably fitted up and down slidably in a holder having a through-hole, and a thread bow that grips the holder and raises and lowers the thread puller at a predetermined speed. And an optical means for confirming the positions of the starting point of the measurement of the thread length of the test liquid and the cutting time of the spinning test liquid. .

1 2. Lower the stringing rod at a given speed in a direction facing the sample liquid in the sample pan, and move the optical axis passing directly above the top of the sample liquid in the sample pan to the lower end of the stringing rod. When the section is interrupted, the lowering of the stringing rod is stopped, and the lower end of the stringing rod is brought into contact with the test liquid. Thereafter, the stringer is raised to bring the liquid to be tested into a stringy state. When the test liquid in the spinning state is cut and the test liquid returns to the sample pan, A method for measuring the spinnability of a liquid material, comprising measuring an amount of upward displacement of a stringing rod until an optical axis passing directly above a top of a test liquid material in a sample pan is detected by a light receiver.

13. Lower the stringing rod at a given speed in a direction facing the sample liquid in the sample pan, and move the optical axis passing directly above the top of the sample liquid in the sample pan to the lower end of the stringing rod. When the section is interrupted, the lowering of the stringing rod is stopped, and the lower end of the stringing rod is brought into contact with the test liquid. Thereafter, the stringer is raised to bring the liquid to be tested into a stringy state. The test liquid in the stringing state is cut, and the stringing rod is moved until one of the optical axes of the upper plurality of optical sensors arranged in the vertical direction is detected by the light receiver. A method for measuring the spinnability of a liquid material, which comprises measuring the amount of upward displacement.

14 4. Prior to the measurement of the spinnability of the test liquid, lower the holder equipped with the stringing rod for a certain distance, and then raise it for a certain distance. 14. The spinnability measurement method for a liquid material according to claim 12, wherein feedback control is performed so as to satisfy the following.

15. Prior to the measurement of the spinnability of the test liquid, the stringing rod is lowered and the lower end thereof is brought into contact with the test liquid to be in a wet state. 3. The method for measuring the spinnability of a liquid material according to item 1.

1 6. A certain amount of the test liquid is stored in the sample pan while the tube, slit, or orifice at the lower end of the sample pan is in contact with the sample pan.

Then, the stringer provided with the sample pot is raised, and the test liquid is allowed to flow down from one of the tubes, slits, and orifices at the lower end of the sample pot. A method for measuring the spinnability of a liquid material, wherein the spinning length until a broken droplet state is measured.

17. A fixed amount of the test liquid is stored in the sample pan with one of the tube, slit, and orifice at the lower end of the sample pan in contact with the sample pan, and then the sample pan is attached. Raise the stringing rod and let the test liquid flow down from one of the tube, slit, and orifice at the lower end of the sample pot. A method for measuring the spinnability of a liquid material, characterized in that the time until the liquid material to be tested in the liquid is completely discharged is measured.

18. The characteristic is that the thread length of the test liquid in the first measurement is used as a reference value, and the time or the number of measurements until the thread length reaches a certain ratio of the reference value is detected. A method for measuring the spinnability of a liquid material.

1 9. Repeat the measurement of the stringiness of the test liquid in the sample pan by setting the lifting distance of the stringing rod to a constant value within the limit at which the test liquid does not cut. A method for measuring the spinnability of a liquid material, wherein the time until the test liquid material is cut or the number of measurements is detected.

20. A stringer for liquids, characterized in that the stringer is lifted from the sample pan for a certain distance and held in that state to detect changes over time in the electrical conductivity of the test liquid. Sex measurement method.