CN203693562U

CN203693562U - Pressing pain mechanical tester

Info

Publication number: CN203693562U
Application number: CN201320815358.0U
Authority: CN
Inventors: 张军
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-12
Filing date: 2013-12-12
Publication date: 2014-07-09
Anticipated expiration: 2023-12-12

Abstract

The utility model provides a pressing pain mechanical tester, which comprises a casing, a digital display screen and a measuring device, wherein the measuring device is arranged inside the casing, the top of the casing is provided with the digital display screen with a data processing function, the measuring device measures the pressure and displacement and transmits signals to the digital display screen, the pressing pain value is calculated on the basis of viscoelasticity model of human body soft tissues under large deformation, and the measuring device responds the measured value to the digital display screen. The pressing pain mechanical tester has the advantages that the defect that the human body muscle state detection is influenced by subjective feelings of patients in the prior art is overcome, and the pain state of the human body muscle can be objectively and quantificationally recorded.

Description

A kind of tenderness mechanical test instrument

Technical field

This utility model relates to a kind of tenderness mechanical test instrument, belongs to surgical medical equipment technical field.

Background technology

Pain is a kind of general clinical symptoms, brings a lot of negative impacts to patient's life.Patient's subjective pain impression is inquired in the main dependence of Clinical Pain diagnosis at present, there is no the means of reliable quantify pain value, poor accuracy.

General is pain psychology gage in the world, can obtain the subjective pain information of patient, affected by patient's subjectivity larger for clinical diagnosis.Also there is research worker to utilize functional magnetic resonance imaging instrument scanning brain to measure the method for a true pain degree of people, but the method apparatus expensive, complicated operation.

Utility model content

The purpose of this utility model has been to provide a kind of impact that is not subject to patient's subjective feeling, can record objective, quantitatively human body tenderness mechanical test instrument, it has overcome shortcoming of the prior art, realize the composite measurement of infantile myasthenia tissue tension and pressure pain point threshold value, can be used as doctor and understand the foundation of threshold of pain difference between contrast situation before and after patient's tenderness degree and treatment and more different patient, and improve human muscle's mechanics quantitative tester of pain disease relaxation treatment effect.

The purpose of this utility model is achieved in that human body tenderness mechanical test instrument mainly comprises housing, digital display screen and measuring device, and measuring device is installed on enclosure interior, and case top is provided with the digital display screen with data processing function; Measuring device gaging pressure and displacement transmission of signal are to digital display screen; Calculate tenderness value based on the viscoelastic model of human body soft tissue under large deformation, described measuring device by the numerical response of measuring in digital display screen.

Further, described measuring device comprises pressure head, sleeve, displacement transducer, guide rail, pressure transducer and spring, pressure head is connected in sleeve, and sleeve is connected in housing and can slides along inner walls, and pressure head is exposed to hull outside, detection head one end of displacement transducer is vertically connected at sleeve, and the other end is vertically connected at housing; Between sleeve and inner walls, be connected with guide rail, guide rail overcoat has spring, pressure transducer compacting spring.

Further, described pressure head is a cylinder, and head is smooth semicircle.

Further, sleeve is a cylinder, and upper and lower interplanar has two smooth through holes.

Further, described guide rail is two common smooth cylindrical bars.

In the digital display screen of display measurement result, be provided with data processing chip and data show chip; Pressure transducer can convert power to signal of telecommunication output by pressure head, displacement transducer can be exported displacement by the displacement bar of main body both sides and the transmutability member bridging on displacement bar, pressure signal is connected with wave filter, signal amplifier and A/D converter respectively with displacement signal outfan, calculate tenderness value through data processing chip processing again, and be presented on digital display screen, this tenderness mechanical test instrument can be measured tenderness value and soft tissue tension objectively, adopts quantitative method to judge therapeutic effect.

Operation principle of the present utility model and flow process brief introduction are as follows:

Human skin soft tissue model is the application of deformation model aspect human skin Modeling of Soft Tissue.In order to meet the composite request of system to verity and reaction real-time, analyzing after non-physical model, quality-spring model, FEM (finite element) model and four kinds of Modeling of Soft Tissue methods of long model of element, on the basis of quality-spring model, set up the live body soft tissue viscoelastic model under large deformation.The equation of motion that is whole system can obtain from set grid in the motion of all quality point.The motion vector that the position vector of N independent mass point is connected into a 3N dimension, can obtain

（1）

Wherein, M, C and K are respectively quality, damping, elastic coefficient matrix, and x is motion vector, are all typical sparse matrixes.M and C are diagonal matrixs, and K is banded, because the elastic force of spring is only the function of adjacent quality point spacing.F is a 3N dimensional vector, represents to be applied to all external force in quality point.

Consider that human body soft tissue has viscoelasticity, at corresponding load application with while shedding load, through an exponential time delay ( ), the spring constant of soft tissue model can be simulated with exponential function, and setting coefficient of elasticity k is the exponential function of deflection x,

（2）

Wherein a, b are parameters to be determined, and x is by the deflection of pressure point.

Adopt conventional alternative manner euler algorithm to get final product the dynamical equation of solving system.

By setting up the viscoelastic model of human body soft tissue, can well matching human body soft tissue state, for detecting, human body muscular states provides pressure-displacement model, and can be by calculating the mechanical characteristic of body local soft tissue.

Compared with prior art, the beneficial effects of the utility model are:

1. this utility model has overcome the shortcoming that in prior art, human muscle's state-detection is affected by patient's subjective feeling, can record human body muscular states objective quantitative.

2. this utility model can be measured soft tissue tension to combine with pressure pain point measurement, and the achievement data of the interpersonal muscular states of a kind of overall merit is provided.

3. this utility model volume is small and exquisite is easy to carry, and has safety, can show in real time precise information.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present utility model;

Labelling in figure: 1, pressure head, 2, sleeve, 3, displacement transducer, 6, guide rail, 7, pressure transducer, 8, spring, 9, housing, 4, displacement transducer signal line, 5, pressure sensor signal line.

Fig. 2 is measuring device structure principle chart of the present utility model;

Labelling in figure: 1, pressure head, 10, digital display screen, 11, handle, 12, charging plug.

The specific embodiment

As shown in Figure 2, hand-held tenderness mechanical test instrument handle 11, measuring device is placed in to patient skin upper surface, referring to Fig. 1, make pressure head 1 contact human body skin surface, and keep plumbness with skin surface, press pressure measuring device downwards, pressure head 1 can be along with measuring device moves down, cause the distortion of muscle, and owing to being subject to the obstruction of skin surface, sleeve 2 will pop up, the displacement that the displacement transducer 3 of branch sleeve 2 can detect sleeve 2 at any time changes, this shift value is exactly the deflection of skin surface, the pressure transducer 7 of branch sleeve 2 can detect the pressure change of sleeve 2 at any time, this force value can reflect the tensile force of skin surface.Above-mentioned two physical quantitys pass to digital display screen 10 by displacement transducer signal line 4 and pressure sensor signal line 5 respectively.Two signal output parts are connected with wave filter, signal amplifier and A/D converter respectively, then obtain power-displacement relation through data processing chip processing.And according to soft tissue viscoelastic model under large deformation, calculate the mechanical characteristic that detects local soft tissue under pressure head.After operation, process chip can be processed detecting data, calculates human body soft tissue tension force and pressure pain point, and shown by digital display screen according to human body soft tissue viscoelastic model in triplicate.During if there is obvious tenderness, patient can record pain value now by pressing down-sampling button, degree that equally can evaluate patient pain.

This tenderness mechanical test instrument that this utility model provides, can measure objectively pain degree, adopt quantitative method to judge therapeutic effect and pain Variation Features, also have the advantages such as simple and reasonable, the little quality of volume is light, cheap, easy for operation, be a kind of Nover practical at medical domain, the survey tool being convenient to popularize simultaneously.

Claims

1. a tenderness mechanical test instrument, is characterized in that, comprises housing, digital display screen and measuring device, and measuring device is installed on enclosure interior, and case top is provided with the digital display screen with data processing function; Measuring device gaging pressure and displacement transmission of signal are to digital display screen; Calculate tenderness value based on the viscoelastic model of human body soft tissue under large deformation, described measuring device by the numerical response of measuring in digital display screen.

2. a kind of tenderness mechanical test instrument according to claim 1, it is characterized in that, described measuring device comprises pressure head, sleeve, displacement transducer, guide rail, pressure transducer and spring, pressure head is connected in sleeve, sleeve is connected in housing and can slides along inner walls, pressure head is exposed to hull outside, and detection head one end of displacement transducer is vertically connected at sleeve, and the other end is vertically connected at housing; Between sleeve and inner walls, be connected with guide rail, guide rail overcoat has spring, pressure transducer compacting spring.

3. a kind of tenderness mechanical test instrument according to claim 2, is characterized in that, described pressure head is a cylinder, and head is smooth semicircle.

4. a kind of tenderness mechanical test instrument according to claim 2, is characterized in that, sleeve is a cylinder, and upper and lower interplanar has two smooth through holes.

5. a kind of tenderness mechanical test instrument according to claim 2, is characterized in that, described guide rail is two common smooth cylindrical bars.