SU1782537A1 - Device for measuring bio mechanical characteristics of biological tissues - Google Patents

Description

The invention relates to the field of medicine and healthcare, in particular to diagnostic devices, and is intended for registration of biomechanical characteristics of biological tissues.

The purpose of the invention is the registration of attenuation of oscillations.

Haha. 1 shows the design of a device for measuring the biomechanical characteristics of biological tissues: in FIG. 2 is a flowchart explaining a principle of operation.

A device for measuring the biomechanical characteristics of biological tissues contains a housing 1 with a handle 2 fixed in it with the possibility of movement of the hammer in the form of a lever 4 fixed in bearings 3, at one end of which there is an electromechanical transducer 5 and a tip made in the form of a roller 6, connected by conical connection 7. The other end of the lever 4 is installed with the possibility of interaction with the electromagnet 8 through the armature 8 and connected to the control circuit. The device is equipped with an elastic element 10 located between the housing 1 and the lever 4. The control circuit is made in the form of a trigger button of the 11th serially connected electromechanical converter 1, located on the lever 4, of a threshold device 13, the second input of which is connected to the trigger button 11, a one-shot 14, amplifier 15 power, the second input of which is connected to the second electromechanical converter 12, is made in the form of a force or displacement sensor, and the output is driven by a hammer in the form of an electromagnet 8, and the input is register ra 16 performed as an analog recorder, coupled to an output recorder 16 configured as an analog recorder, connected to the output electromechanical transducer.

The device may be equipped with a digital recorder containing a series-connected analog-to-digital converter 17, the input of which is connected to the output of the electromechanical converter 5. by a digital processing unit 18 with an indicator 19, the second input of which is connected to the start button 11, and a digital printing unit 20.

The device operates as follows.

Holding the handle 2, the device is brought closer to the test object and set so that the roller 6 is at the test point. Then, the start button 11 is pressed and the housing 1 is gradually brought closer to the surface of the test tissue, slightly pressing roller 6 into the test tissue. The pressing force is created by the spring 10 and is measured by the second electromechanical transducer 12. As soon as the pressing force exceeds the threshold set on the threshold device 13, a single-shot 14 is started, which creates a current pulse of a given duration and amplitude by means of a power amplifier 15, which causes the corresponding armature 8 and an armature 9 the impulse transmitted through the lever 4 to the roller 6 in the form of an impact on the studied area of biological tissue. Shock exposure leads to damped vibrations of biological tissue. Since the roller 6 is under the influence of the elastic element 10 in constant contact with the studied area, then he, and with it the lever 4 with the electromechanical converter 5 mounted on it. oscillates together with the biological tissue under study and from the electromechanical converter 5, the electric signal is fed to the recorder 16 and through the analog-to-digital converter 17 and the digital processing unit 18 with the indicator 19 to the digital printing unit 20. The digital processing unit 18 finds the extremes of the oscillation signal and calculates the period and decree of the damped oscillations, and it is launched through the button 11.

To reduce the influence of the mass of the lever 4 and the elasticity of the elastic element 10 on the process of damped oscillations, feedback was issued from the second electromechanical transducer 12 to the power amplifier 15, which forces the lever 4 to repeat the oscillations of the tissue under study, maintaining a strictly constant pressing force on the roller 6.

If sterilization of the roller 6 is required, the tip is removed from the conical connection 7.

Claims (3)

Claim 1. A device for measuring the biomechanical characteristics of biological tissues, comprising a housing with a handle and a drummer with an electromechanical converter mounted on it with the ability to move, a drummer drive and a recorder, characterized in that, in order to register the attenuation of the oscillations of the tissue under study, the drummer is connected to the housing by means of an elastic item. 2. The device pop. / characterized in that a second electromechanical converter is introduced into it and the equalization circuit pack 5 1782537 is made in the form of series-connected buttons, a threshold device, the second input of which is connected to the output of the electromechanical converter, one-shot, power amplifier, the second input of which is connected to the electromechanical transducer, and the output is driven by the hammer, and the input of the recorder is connected to the output of the second electromechanical converter. 10 3. The device according to claim 2, with the exception of those. that a digital recorder is introduced into it, made in the form of a series-connected analog-to-digital converter, the input of which is connected to the output of the second electromagnetic converter, a digital processing unit with an indicator, the second input of which is connected to the start button and digital printing unit.