JPS58169434A - Electrical and dynamical diagnostic apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromechanical diagnostic device used for diagnosing biological tissues of humans, animals, etc.

In order to treat and treat diseases in living organisms, it is essential to detect the site and type of a lesion. -1- As a method of inspection, various biological tissues 1! [! Measurement of quantities has become common practice, and devices for this purpose have also been developed, but unlike industrial materials, living organisms are soft bodies with complex shapes, so it is difficult to measure standardized physical quantities. It is difficult. In particular, it is difficult to understand the characteristics of the living body as a cisnum even if a part of it is taken as a test piece and measured, and therefore the unit area is Directly measuring a standardized physical quantity such as the amount of displacement (strain) per unit length in response to force (stress) is unconventional. , investigate the response to input to the living body, measure macroscopic evaluation indices such as electrical and mechanical impedance, phase difference, resonance frequency, stiffness, compliance, etc. of the living system, and then evaluate the biological system by considering numerical theoretical models. It is more advantageous to calculate the complex modulus of elasticity and complex permittivity, obtain standardized physical quantities that do not depend on the shape of the living body, and use this to diagnose each part of the living body. There is a need for the development of an electromechanical diagnostic device that can be easily and reliably carried out.

This invention was made in view of the above circumstances, and it examines the response to electrical and mechanical signal input to each part of the living body while maintaining its biological form, and calculates the macroscopic evaluation index. The probe, load cell, exciter, and displacement meter are provided on the measurement axis and placed on the opposite side of the sample stand with the sample located on the sample stand in between. , and the sample stage is configured to be rotatably displaceable about a three-dimensional coordinate axis.

The details of this invention will be described below with reference to the drawings showing one embodiment. I will explain.

In FIGS. 1 and 2, 1 is an electromechanical diagnostic device. The electrical/mechanical diagnostic device 1 includes a rigid housing 2 . The central space of the housing 2 constitutes a sample section 3. Sample section 3
A sample stage 4 is arranged directly below. The sample stage 4 is composed of a rotating tilt pulley, and the direction and rotation angle are controlled by a controller 6.

The sample stage 4 can be moved in the directions of the X, Y, and Z axes.

Their movement and rotation are controlled by a controller 6 using a motor and a gear mechanism (not shown).

A microwave receiver 7 is attached to the sample stage 4.

On the other hand, a measurement axis 8 is arranged on the opposite side of the sample stage 4, sandwiching the sample part 3, and a probe o-711, an XYZ
An o-docell 12, an exciter 13, an accelerometer 14 and a displacement meter 15 are installed.

At the tip of the probe 11, in addition to the mechanical probe head,
In some cases, a microwave probe 16 is attached. The exciter 13 is fixed to the measurement shaft 8 and supported by a support member 18 via a universal joint 17. Therefore, the exciter 13, the measurement axis 8 fixed to the exciter 13, the probe 11, the XYZ load cell 12, the accelerometer 14, and the displacement meter 15 attached to the measurement axis 8 can be moved in any direction and direction with respect to the universal joint 17. Can be rotated to any angle. The rotation direction and rotation angle are controlled by the controller 6.

On the other hand, a guide 21 having a substantially arc-shaped guide part is fixed to the housing 2, and the support member 18 is supported by this guide 21 and moves the object to be measured on the sample stage 4 along the guide part.
can be displaced around. The amount of displacement is controlled by controller 6
controlled by

Diagnostic operations using the electromechanical diagnostic device 11 having such a configuration are as follows.

First, a living body or a part of a living body as an object to be measured is placed on the sample stage 4 . Move the sample stage 4 to a position where the head of the probe 11 is perpendicular to the object to be measured 10, move the measurement axis 8 along the guide 21, and then finely adjust the head of the probe 11. Let's do it. Fine adjustment of the probe head is performed by a universal joint that supports the measuring axis 8.

Here, the fact that the probe head is perpendicular to the surface of the measurement point of the object to be measured 10 does not mean in a geometric sense, but rather that the force or displacement is input perpendicularly to the measurement point of the object to be measured 10 from the probe head. means in position. When measuring the mechanical vibration response, if the probe head is not set perpendicular to the measurement area of the object to be measured 10, component forces will be generated in the X and Y axis directions (perpendicular to the measurement axis 8). Since the probe 11 slides on the surface of the object to be measured, a mechanical phase difference that should not exist in the first place is observed. When this phase difference occurs, the X, Y, Z
Using an XYZ load cell 12 (force detector) capable of detecting component forces in the directions, the measurement axis 8 is slightly rotated so that the component forces in the X, Y, and Z directions are symmetrical with respect to O or the measurement axis 8. The signal from ZY70-Docell 12 is measured by the shaft drive device (
(not shown), such an angle correction of -6= can be realized. Once the probe head is set correctly, the exciter 13 is activated to apply a vibration input controlled by the force or displacement amplitude to the object to be measured 10, and the displacement or force response is measured by the displacement meter 15 and the XYz
It is detected by the load cell 12 (7 axes), and each signal is processed according to a predetermined process to obtain mechanical quantities such as mechanical impedance, stiffness, compliance, and phase difference. If the response of the object to be measured is analyzed using a method such as FFT, the frequency spectrum of the mechanical impedance of the living body will be observed as a certain pattern. becomes possible instantly. Finally, the position information and electrical and mechanical quantities of the object to be measured are sent to a computer and displayed as a medical image.

It should be noted that this configuration enables measurement from DC to low frequency range (large audible frequency range 3K H2).

However, when measuring in the ultrasonic range, the probe head is composed of a ceramic transducer such as PZT. [1-Replace the head with an electrode, microwave horn, or coaxial probe for reflection (for example, see Patent Application Publication No. 100691 of 1981), and use a corresponding oscillator, sweeper, bridge, or reflection transmission test set for the measuring instrument. etc.

In the electromechanical diagnostic device configured in this way, it is possible to test the test portion of the sample in a state that constitutes a part of the sample, and therefore it can be used clinically and accurate testing is possible. In addition, the measurement system consisting of a probe, load cell, exciter, etc. is located on the opposite side of the sample stage and is constant for samples of various shapes, so there is no need to adjust the system depending on the shape of the sample. Furthermore, since the probe comes into contact with the surface of the test portion of the sample in the normal direction, accurate information can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view showing an electromechanical diagnostic device according to an embodiment of the present invention, and FIG. 2 is an enlarged side view of the electromechanical diagnostic device. ;el 8...Measurement axis 10...Object to be measured 11...
Probe 12...XYZ load cell 13...
・Exciter 14... Accelerometer 15... Displacement meter
16...Microwave probe

Claims (1)

[Claims] An electromechanical diagnostic device comprising at least a sample stage, a probe, a load cell, an exciter, and a displacement meter, arranged at the knees of the probe, load cell, and the sample stage, and configured to be capable of rotationally displacing the sample stage in relation to a three-dimensional coordinate axis.