JPH01209358A - Physical property value measuring apparatus for composite material and fibrous substance - Google Patents

Abstract

PURPOSE:To obtain an apparatus which enables measurement of a physical property value on stream, by providing an ultrasonic wave generating means for generating an ultrasonic wave in an object to be measured to perform a computation based on a propagation velocity of the ultrasonic wave and an expression previously stored. CONSTITUTION:Based on a drive command signal outputted from a control circuit 4, an object 6 is irradiated with a laser light from a laser oscillator 1 for generating ultrasonic waves to generate an ultrasonic wave in the surface of the object 6. The ultrasonic wave propagating through the object 6 is detected with an ultrasonic wave detector 2 provided at a specified distance from the laser oscillator 1. The propagation velocity of the ultrasonic wave is determined with a data analysis/memory circuit 3 from a time difference between the timing of irradiating the object 6 with the laser light and that of detecting the ultrasonic wave propagating through the object 6 with the ultrasonic wave detector 2. Then, a physical property value of the object 6 is determined by an expression for obtaining the value from the ultrasonic wave propagation velocity previously stored.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention generally relates to a device for measuring physical properties of composite materials and fibrous materials, and in particular, for example, composite materials such as fiber-reinforced composite pipes and plates, and carbon fiber , glass fiber, aramid fiber and ceramic fiber,! The present invention relates to a device for measuring physical properties of composite materials and fibrous materials, which measures the physical properties (e.g., elastic modulus) of a jaIti-like substance such as i by irradiating the surface of the substance with a laser beam.

-1- The physical properties of composite materials such as fiber-reinforced composite pipes and plates, and fibrous materials such as carbon fibers, glass fibers, aramid fibers, and ceramic fibers, that is, the dust index , Δlli was determined by the method described below. That is, first, there is a first step in which the aforementioned various composite materials and various fibrous materials, which are the objects to be measured for elastic modulus, are cut to a predetermined length as a sample for elastic modulus measurement, and the sample cut in the first step is A second step of carrying out a tensile test after setting it in a tensile tester, and determining the relationship between load and elongation in the sample, which is the object to be measured for the elastic modulus, from the test results of the tensile test carried out in the M2 step. The method also includes a third step of determining the elastic modulus of the object to be measured for elastic modulus from the thus determined relationship between load and elongation and the value of the cross-sectional area of the sample.

By the way, in the method for measuring the elastic modulus as described above, three steps are required to determine the elastic modulus of the object to be measured. It is said that the work of cutting out samples from the various composite materials and various fibrous materials mentioned above, and the work of setting the cut out samples in the tensile testing machine performed in the second step, require a considerable amount of time and effort. There's a problem.

Moreover, the tensile tester used in the second step is
As mentioned above, a tensile test is performed by setting a sample cut to a predetermined length, so this tensile tester can be used in equipment that manufactures composite materials or fiber manufacturing equipment that manufactures fibrous materials. Incorporate it into Ons Dream! There is also the problem that it is not possible to test the elastic modulus of a male composite material or the elastic modulus of fibers. Furthermore, the deformation of the tensile testing machine itself that occurs during operation of the tensile testing machine makes it difficult to accurately grasp the relationship between load and elongation in composite materials and fibrous materials, which are the objects of elastic modulus measurement. There was also the problem that accurate measurement of elastic modulus was not possible.

Therefore, in order to solve many of the problems mentioned above, the present inventors recalled the idea of discontinuing the use of the tensile testing machine used in the second step, and decided to replace the tensile testing machine. Repeated experiments and research were carried out to find more preferable technical means. As a result, ultrasonic waves are generated by irradiating a laser beam of a predetermined intensity onto the surface of the composite material or fibrous material that is the object of elastic modulus measurement, and the
We focused on a method of determining the elastic modulus by detecting the propagation speed in the object to be measured, and as a result of actually assembling a device and conducting experiments with the device, we were able to obtain extremely good elastic modulus measurement data. It turned out that it was possible.

The present invention is based on such novel findings.

SUMMARY OF THE INVENTION Therefore, the present invention was devised in order to solve the above-mentioned problems, and its purpose is to provide an apparatus for manufacturing composite materials and fibers for manufacturing fibrous materials with high working efficiency. By incorporating it into manufacturing equipment, you can test the physical properties such as the elastic modulus of composite materials and fibrous materials using ONS DREAM.
It is possible to measure physical properties such as elastic modulus with high precision.
An object of the present invention is to provide a device for measuring physical properties of composite materials and fibrous materials.

, 11 - The above object is achieved by the device for measuring physical properties of composite materials and fibrous materials according to the present invention. In summary, the present invention provides an ultrasonic wave generating means for generating ultrasonic waves in a non-contact state with respect to a composite material and a fibrous material, and a device for detecting the ultrasonic wave propagating inside the composite material and the fibrous material. , an ultrasonic detection means provided at a predetermined distance from the ultrasonic generation means;
an arithmetic expression for calculating the physical property values of the composite material and the fibrous material from the distance data between the ultrasonic generating means and the ultrasonic detecting means, the given density and the obtained ultrasonic propagation velocity value; The ultrasonic data is calculated from the storage means stored in advance, the time difference value between the time when the ultrasonic wave generation means generates the ultrasonic wave, and the time when the ultrasonic wave detection means detects the ultrasonic wave, and the distance data. Composite materials and fibrous materials characterized by comprising: arithmetic processing means for determining the propagation velocity of a sound wave and calculating physical property values of the composite material and fibrous materials from the determined ultrasonic propagation velocity value and the arithmetic expression. This is a device for measuring the physical properties of substances.

Shocking An embodiment of the present invention will be described below with reference to one drawing.

FIG. 1 shows a composite material and H according to a first embodiment of the invention.
& Fibrous material physical properties (1i'i Is 0 indicating device for determining physical properties of composite materials and fibrous materials according to the first embodiment of the present invention (hereinafter referred to as "physical property value measurement bag δ" for simplicity) ) measures the physical properties (especially elastic modulus, hereinafter simply expressed as elastic modulus) of fibrous materials (hereinafter simply referred to as "fibrous materials")6 such as carbon fibers, glass fibers, aramid fibers, and ceramic fibers. As is clear from FIG. 1, this device includes an ultrasonic generating means, that is, an ultrasonic generating laser oscillator 1, an ultrasonic detecting means, that is, an ultrasonic detector 2, and a memory. A data analysis/memory circuit 3, a control circuit 4, a data display section 5, which has both a storage device for various data possessed by the means and a data arithmetic processing g&me possessed by the arithmetic processing means. The above-mentioned configuration will be described in more detail as follows.That is, the ultrasonic generation laser oscillator 1
is placed under the control of the control circuit 4, and the surface of the fibrous material 6 is irradiated with laser light, and due to the radiation pressure of the irradiated laser light, the fibrous material 6 is Ultrasonic waves are caused to be generated in the m-male substance 6 by the thermal stress generated on the surface and the force exerted on the fibrous substance 6. As is already well known, the ultrasonic wave generating laser oscillator 1 analyzes the data when it receives an excitation lamp, a power supply circuit for driving the excitation lamp, and a laser beam emitted from the excitation lamp. - Equipped with light receiving element means (none of which are shown) etc. for outputting a predetermined electric signal to the memory circuit 3.

The ultrasonic detector 2 is installed at a predetermined distance from the ultrasonic wave generating laser oscillator l, and is in a non-contact state with the fibrous substance 6 by the laser beam irradiation by the ultrasonic wave generating laser oscillator l. Ultrasonic waves generated and propagated through the fibrous material 6 are detected, and a predetermined electrical signal is output to the data analysis/storage circuit 3. The ultrasonic detector 2 that detects ultrasonic waves propagating through an object to be measured for elastic modulus, such as the fibrous material 6 described above, without contacting the object, includes a stabilized detector as shown in FIG. Ultrasonic detector 1■1 device related to Michelson interference method,
There are two types of ultrasonic detectors according to the heterogain interference method as shown in FIG. 5, and the details of these configurations will be described later.

As is already clear from the above-mentioned content, the data analysis/storage circuit 3 includes a memory section (not shown) having a memory section for storing various data, and various data stored in the memory section. It consists of a signal processing section that performs arithmetic processing. The data stored in the memory unit mentioned above includes, for example, distance data indicating the distance between the ultrasonic wave generating laser oscillator 1 and the ultrasonic detector 2, and the distance data calculated using the distance data and the signal processing unit. From the time difference value of flu between the time when the ultrasonic wave generating laser oscillator l irradiated the laser beam and the time when the ultrasonic detector 2 detected the ultrasonic wave propagated in the fibrous material 6, A first calculation formula for determining the propagation velocity C of the ultrasonic wave 1 Density value data of various fibrous substances 6 as the elastic modulus measurement target, the propagation velocity C of the ultrasonic wave determined by the first calculation formula, , the second calculation formula (i.e., wave equation) for calculating the elastic modulus of various fibrous materials 6, which are the objects to be measured, from the density value data. As is already clear from the above content, the signal processing section first determines when an electric signal is output from the light receiving element means of the ultrasonic wave generating laser oscillator l and when an electric signal is output from the ultrasonic detector 2. Then, the ultrasonic propagation velocity C is obtained from the distance data stored in the memory section and the first calculation formula, and the ultrasonic propagation velocity C thus obtained and It is configured to obtain the value of the elastic modulus of the fibrous material 6 from the second calculation formula.The control circuit 4 described above controls the data analysis/storage circuit 3 and others according to a preset program. , a laser oscillator for generating ultrasonic waves 1, and a drive of the Mi sound wave detector 2. The control circuit 4 controls the driving of the laser oscillator for generating ultrasonic waves 1 and the ultrasonic detector 2 according to the program. By outputting a command signal, the measurement interval of the propagation velocity C of the ultrasonic wave propagating in the fibrous material 6 is adjusted.The data display section 5 is connected to the data analysis/storage circuit. For example, the distance data stored in the memory section, the propagation velocity of the ultrasonic wave calculated by the signal processing section C1, the fibrous material 6 stored in the memory section. It is configured to display the density value data of the fibrous material 6, the elastic modulus value of the fibrous material 6 calculated by the signal processing section, etc. in various ways.

In the configuration described above, when the ultrasonic wave generating laser oscillator l irradiates a laser beam toward the m fibrous material 6 based on the drive command signal output from the control circuit 4, this causes the surface of the fibrous material 6 to be The generated ultrasonic waves propagate through the fibrous material 6, and the ultrasonic waves are provided at a predetermined distance from the ultrasonic generation laser oscillator 1 without contacting the surface of the fibrous material 6. When the laser oscillator l for generating 0Mi sound waves detected by the ultrasonic detector 2 irradiates a laser beam and a predetermined electric signal is output from the light receiving element means, the data analysis memory circuit 3 detects the electric signal. At the same time, the time when the ultrasonic detector 2 outputs the electric signal indicating that the ultrasonic wave propagated through the fibrous material 6 is outputted is stored in the memory section, and the signal processing section stores the timing when the ultrasonic wave propagated through the fibrous material 6 is outputted. Calculate the time difference value between. After determining the time difference value in this manner, the signal processing section determines the propagation velocity C of the ultrasonic wave using the process described above, and then determines the value of the elastic modulus of the fibrous material 6 and displays it in the data display section 5. It will be displayed.

FIG. 2 shows a physical property value measuring device according to a second embodiment of the present invention.
An apparatus for measuring physical property values (particularly elastic modulus, hereinafter simply expressed as elastic modulus) of 106 (referred to as "composite material"),
As is clear from FIG. 2, the ultrasonic wave outputs an electric signal to the data analysis/storage circuit 3 at the time when the ultrasonic wave is detected by the device having the configuration shown in FIG. 1. The configuration is such that an ultrasonic detector 102 substantially similar to the detector 2 is added. That is, in FIG. 2, the ultrasonic detector 2 detects the data when it detects the ultrasonic waves propagating in the longitudinal direction of the composite material 106 excited by the laser beam irradiation from the ultrasonic generation laser oscillator 1. The ultrasonic detector 102 detected ultrasonic waves propagating in the circumferential direction of the composite material 106 excited by the laser beam irradiation. Both the ultrasonic detectors 2 .
By setting 102, the composite material 106 (
That is, the measurement of the propagation velocity C of the ultrasonic wave in the longitudinal direction and the circumferential direction of the fiber-reinforced composite material pipe is carried out in a circular manner. The propagation velocity C of the ultrasonic wave propagating to and the composite material 1
The ultrasonic detectors 2 and 102 that detect ultrasonic waves without contacting the composite material 106 are arranged so that the propagation velocity C of the ultrasonic waves propagating in the circumferential direction of the composite material 106 is the same as the measured rotation speed. However, by changing the number of adjacent ultrasonic detectors and the manner in which they are installed, it is possible to simultaneously measure the propagation velocity C of ultrasonic waves propagating in a plurality of directions (arbitrary directions). In addition, by employing the physical property value measuring device having the above-described configuration, it is possible to detect the orientation of the mAa forming the fiber-reinforced composite pipe, which is the composite material 106, and at the same time, for example, the orientation of the fibers is detected. It has also become possible to reliably detect defects such as cuts or voids in the matrix when the fiber-reinforced composite plate is present. The configuration of the data analysis/storage circuit 3, control circuit 4, and data display section 5 and the operation of each part described above are substantially the same as those of the physical property value measuring device according to the first embodiment of the present invention shown in FIG. Therefore, its explanation will be omitted.

FIG. 3 shows a physical property measuring device according to a third embodiment of the present invention. This is an apparatus for measuring physical property values (particularly elastic modulus, hereinafter expressed as elastic modulus) of 206 (referred to as "composite material"), the outline of which is as is clear with reference to FIG. A configuration in which an ultrasonic detector 202 substantially similar to the ultrasonic detector 2 that outputs an electric signal to the data analysis/storage circuit 3 at the time of detecting an ultra-FG wave is added to the device having the configuration shown in FIG. It becomes. That is, in FIG. 3, the ultrasonic detector 2 detects the direction of the Oo force of the composite material 206 excited by the laser beam irradiation from the ultrasonic generation laser oscillator 1, that is, the direction of the Oo force of the composite material 206, which forms the fiber-reinforced composite plate. Fig. 3 shows the laser beam irradiation position from the ultrasonic generation laser oscillator l on the fiber-reinforced composite plate h and the km ff wave ultrasound propagated in the fiber-reinforced composite plate. a ft which propagates in the straight line direction connecting the position of incidence on the detector 2 (the same applies hereinafter).
The Mi sound wave detector 202 is configured to output an electrical signal to the data analysis/storage circuit 3 when a wave is detected.
, when an ultrasonic wave propagating in the 90° direction (i.e., a direction perpendicular to the O0 direction, the same applies hereinafter) of the serious composite material 206 excited by the laser beam irradiation is detected, the data is detected. Both ultrasonic detectors 2,
202, the composite material 206 (
i.e., the 00 direction and the 90' direction of the fiber-reinforced composite plate)
In this example, for convenience of explanation, the composite material 20
The composite material 206 is in a non-contact state so that the propagation velocity C of the ultrasonic wave propagating in the 00 direction of the composite material 6 and the propagation velocity C of the ultrasonic wave propagating in the 90'' direction of the composite material 6 are measured respectively. The ultrasonic detectors 2, 202 for detecting ultrasonic waves are arranged in the d, but by changing the number of ultrasonic detectors installed and the manner in which they are installed, it is possible to It is possible to simultaneously measure the propagation velocity C of the ultrasonic wave propagating from θ to θ (900°) as shown in Fig. It is now possible to detect the orientation of the fibers forming the fiber-reinforced composite plate, which is 206, and to detect defects such as broken m-fibers or voids in the matrix. It has also become possible to reliably detect this if it exists.

Using the physical property measuring device according to the present invention as described above, the elastic modulus of carbon fibers (strands) and glass fibers (strands) as m-male substances 6 is actually measured, and the values of the elastic modulus of carbon fibers (strands) and glass fibers (strands) of composite materials 206 such as fiber reinforced composite plates are measured. For example, as a result of measuring the elastic modulus of carbon fiber reinforced plastic play 1, the data shown in Table 1 could be obtained.

Table 1 In the above clothing 1, sample material, sample ■, sample ■, sample ■, and sample V are carbon fiber reinforced plastic plates, respectively, and the above-mentioned data were obtained using the material value measuring device having the configuration shown in Fig. 3. In addition, sample (2) is carbon fiber (strand), sample (2) is glass fiber (strand), and from these sample (2) and sample (2), the material values of the composition shown in Figure 1 are obtained. The measuring device provided the data described above.

The irradiation conditions of the laser beam irradiated from the ultrasonic wave generation laser oscillator 1 according to this embodiment are as follows.

Nd:YAG laser SHG (wavelength 532nm) Laser output 82 (mJ) Laser beam diameter = 1.5~2.8φ (mm) Laser output density: 133~484 (MW/ crn')
-As is clear from the above, the physical property value measuring device according to the present invention makes it possible to measure the elastic modulus with extremely high accuracy. Note that when conducting the above series of experiments, if a commonly used ultrasonic flaw detector is used, the ultrasonic waves propagating through the fibrous material, which is the object of elastic modulus measurement, will have a large attenuation and a high-precision ultrasonic wave. The propagation velocity of ultrasonic waves cannot be detected, and it is clear that using the aforementioned ultrasonic generation laser oscillator instead of an ultrasonic flaw detector can measure the propagation velocity of ultrasonic waves with much higher accuracy. This was revealed by the inventors.

Here, the fundamental structure of the so-called non-contact type ultrasonic detector used in the physical property value measuring apparatus according to the first to third embodiments of the present invention will be explained.

FIG. 4 shows a stabilized Michelson interference type ultrasonic detector according to the present invention. The stabilized Michelson interference type ultrasonic detector shown in FIG. 4 is roughly as follows. .

That is, when a laser beam is irradiated from the laser 8 (e.g., He-Ne laser, laser output: 5 mW), the laser beam is focused by the lens lla, and the aperture 16a
By passing through the lens 11b, the noise is reduced and the coherence is improved, and the light is sent to the beam splitter 12 through the lens 11b.

The laser light sent to the beam splitter 12 is split into two beams by the beam splitter 12,
One beam is sent to a reflecting mirror 10'a attached to the surface of the piezo element 9 via a lens llc, reflected by the reflecting mirror 10'a, and then sent to the lens lc again.
It will return to the beam splitter 12 via the IE. On the other hand, the other beams separated by the beam splitter 12 described above are sent to the measurement surface 7 of the object to be measured via the lens lid, reflected at the measurement surface 7, and sent to the beam splitter via the lens lld. Return to 12.

The two beams reaching the beam splitter 12 are superimposed at the beam splitter 12 to form interference fringes. The beam on which interference fringes have been formed in this manner passes through the lens lie, and a portion thereof passes through the aperture 16b and is sent to the photodetector 13. That is, when minute fluctuations in ultrasonic waves occur on the surface of various fibrous materials or various composite materials, etc., which are the objects to be measured for elastic modulus, this appears as a movement change in the interference fringes described above, so that the photodetector 13 detects the fluctuations. It can encourage change. When an electric signal corresponding to the movement change of the interference fringes described above is output from the photodetector 13,
The electrical signal is amplified by the signal amplifier 14, and is shown in FIGS.
The signals are output to the data analysis/storage circuit 3 and the low-pass filter 15 shown in FIG. 3, respectively.

The electrical signal input to the low-pass filter 15 is output to the piezo element 9 described above via the low-pass filter 15, and drives the piezo element 9. The effects of low-frequency vibrations transmitted from the outside by the iron, low-frequency vibrations emitted by the measuring instrument itself, changes in the optical path due to atmospheric fluctuations, etc. are eliminated, and the ultrasonic waves (about I MHz or higher). Note that an acoustic speaker may be used in place of the piezo element 9 described above, and a photomultiplier tube photodiode or the like may be used as the photodetector 13.

FIG. 5 shows a hetero gain interference type ultrasonic detector according to the present invention. The hetero gain interference type ultrasonic detector shown in FIG. 5 is approximately as follows. That is, when laser light (frequency fo) is irradiated from the laser 8 (for example, He-Ne laser, laser output 5 mW),
The laser beam is given to the Bragg cell 16 which is ultrasonically vibrated at a frequency fs by the high frequency oscillation circuit 17.The laser beam incident on the Bragg cell 16 which is ultrasonically vibrated at a zero frequency fs is In spite of the ultrasonic vibration of the Bragg cell 16 itself, the beam is separated into a straight beam (frequency fo) and a diffracted beam (frequency fo-fs) without changing its frequency. Among the beams separated by the Bragg cell 16, the straight beam reaches the measurement surface 7 via the lens Ilf, is reflected at the measurement surface 7, returns to the Bragg cell 16 again via the lens ILF, and is diffracted by the Bragg cell 16. The beam becomes a beam having a frequency of f o + f s and is sent to the photodetector 13 . On the other hand, among the beams separated by the Bragg cell 16, the diffracted beam is
The light is reflected by the reflecting mirrors 10'b and 10'C, travels straight through the Bragg cell 16, and is sent to the photodetector 13 at the frequency fo-fs. Here, the measurement surface 7 has a frequency fm due to the laser beam irradiation from the ultrasonic generation laser oscillator 1.
When subjected to ultrasonic vibration at , the laser beam to be sent to the photodetector 13 at the frequency of f o + f s has a frequency of fo + fsffm due to Doppler shift,
Inadvertently, the photodetector 13 has a frequency f o+f sthf
The frequency is 2 fs ± fm, which is the difference between the beam of m and the beam of frequency fo-fs mentioned above, and the amplitude is
A beam of size of is given.

When the beam as described above is applied to the photodetector 13, a predetermined electrical signal is outputted from the photodetector 13 to the data analysis/storage circuit 3. Note that the laser light emitted from the ultrasonic generation laser oscillator l and the laser light emitted from the ultrasonic detection laser 8 are, for example,
By using a reflector such as a polygon mirror, the measurement surface 7 can be scanned over a wide range.

All of the above-mentioned contents relate to a physical property value measuring device using a so-called non-contact type ultrasonic detector. It is not limited only to value measuring devices, but also to physical property value measuring devices equipped with an ultrasonic probe, which is a so-called contact-type ultrasonic detector, and a laser as a means for generating ultrasonic waves. Of course, the application is also circulatory.

6(a), 6(b), and 6(/X) show the ultrasonic probe 302, which is the so-called contact type ultrasonic detector mentioned above.
This figure shows an aspect of elastic modulus measurement using a physical property value measuring device equipped with the following. Figure 7 (a) shows sample A, which is the object to be measured.
A laser beam is irradiated from a direction substantially perpendicular to the surface of the sample A, and the ultrasonic probe 302 is brought into contact with the same side as the laser beam irradiation area of sample A, which is a distance from the laser beam irradiation position. It is designed to detect ultrasonic waves propagating on the surface (in the 0° direction). Figure 7 (b) shows a sample in which the side edge of sample B, which is the object to be measured, is irradiated with a laser beam, and the sample B is located in an opposing relationship with the laser beam irradiated part of sample B, which is a distance away from the laser beam irradiation position. Ultrasonic probe 3 is attached to the side end of B.
02 to detect the ultrasonic waves propagating inside the sample B (in the 0'' direction).
In c), a laser beam is irradiated from a direction substantially perpendicular to the surface of a sample C with a thickness t, which is an object to be measured, and a portion of the sample C that is irradiated with the laser beam is on the side opposite to the irradiation position of the laser beam. The ultrasonic probe 302 is brought into contact with a portion facing each other with the sample C in between, and ultrasonic waves propagating in a direction across the sample C (90° direction) are detected.

As explained above, according to the present invention, an apparatus for manufacturing composite materials and a device for manufacturing fibrous materials with good working efficiency can be used.
By incorporating it into textile manufacturing equipment, you can test the physical properties such as the elastic modulus of composite materials and fibrous materials using Ons Dream.
It is possible to measure physical properties such as elastic modulus with high precision.
A device for measuring physical properties of composite materials and fibrous materials can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an apparatus for measuring physical properties of composite materials and fibrous materials according to a first embodiment of the present invention. FIG. 2 shows a composite material and S according to a second embodiment of the invention.
FIG. 2 is a block diagram showing an apparatus for measuring physical properties of an aW-like substance. FIG. 3 is a block diagram showing an apparatus for measuring physical properties of composite materials and fibrous materials according to a third embodiment of the present invention. FIG. 4 is a block diagram showing a stabilized Michelson interference type ultrasonic detector according to the present invention. FIG. 5 is a block diagram showing a heterogain interference type ultrasonic detector according to the present invention. Figure 6 (a), Figure 6 (b), and Figure 6 (l\) are diagrams showing modes of elastic modulus measurement by a physical property value measuring device equipped with an ultrasonic probe according to the present invention, respectively. be. 1: Laser oscillator for ultrasonic generation 2.102,202,302: Ultrasonic detection base 3: Data analysis/storage circuit 6.108,208: Elastic modulus measurement target agent Patent attorney Nagao Miyagawa ji-21 Figure 4 Figure 5

Claims (1)

[Claims] 1) Ultrasonic generation means for generating ultrasonic waves in a non-contact state with respect to the composite material and the fibrous material; and the ultrasonic generation means for detecting the ultrasonic wave propagating inside the composite material and the fibrous material. an ultrasonic detection means provided at a predetermined distance from the ultrasonic wave generator, distance data between the ultrasonic generating means and the ultrasonic detecting means, a given density and an obtained ultrasonic propagation velocity value. a storage means that stores in advance calculation formulas for determining physical property values of the composite material and the fibrous material; a time point when the ultrasonic wave generating means generates an ultrasonic wave; and a time point when the ultrasonic wave detecting means detects the ultrasonic wave; Calculation processing that calculates the propagation velocity of the ultrasonic wave from the time difference value between the points and the distance data, and calculates the physical property values of the composite material and the fibrous material from the calculated ultrasonic propagation velocity value and the calculation formula. 1. An apparatus for measuring physical properties of composite materials and fibrous substances, characterized by comprising: means.