CN213030696U - String type Doppler test piece device - Google Patents

Abstract

A chord line type Doppler test piece device structurally comprises a controller unit, a chord line type test piece unit and a medium groove; the controller unit is used for controlling the whole device to work, and the chord type test piece unit is electrically connected; the controller unit, the string type test piece unit and the medium groove are mechanically connected; the medium groove is a rectangular groove, and the upper part of the medium groove is opened. The utility model discloses to imitate blood and replace by the string of a thread of circulatory motion to through the spring design of string of a thread formula test piece unit base, solve the problem of often changing the string of a thread, the device wholly accords with relevant standard specification, has very strong practicality.

Description

String type Doppler test piece device

Technical Field

The utility model relates to a string of line formula test piece device, concretely relates to string of line formula Doppler test piece device belongs to supersound transcranial Doppler blood flow analyzer blood flow and measures technical field.

Background

Transcranial Doppler (TCD) is a non-invasive method for examining cerebrovascular diseases by detecting the hemodynamic and physiological parameters of blood flow of the main artery at the bottom of intracranial brain by using ultrasonic Doppler effect.

The main calibration items of the ultrasonic transcranial Doppler blood flow analyzer are blood flow speed error, blood flow detection depth and blood flow direction identification. In the construction of an ultrasonic transcranial Doppler blood flow analyzer calibration test device, a phantom device is needed as a standard measurement object of the transcranial Doppler blood flow analyzer to complete a calibration test.

IEC 61206: six phantom sets are introduced in 1993: a chord line type Doppler test piece, a strip type Doppler test piece, a disc type Doppler test piece, a piston type Doppler test piece, a small ball type Doppler test piece and a blood flow simulating Doppler test piece.

The test phantom recommended by 6.1.3 of ultrasonic transcranial Doppler blood flow analyzer 2005 according to the medical industry standard YY 0593 of the people's republic of China is a blood flow simulation phantom and a chord line phantom.

At present, most of calibration phantom equipment in China mainly depends on import, and test samples are mainly blood flow simulation phantoms. The purpose of the blood flow simulation phantom is to generate a Doppler frequency spectrum simulating blood in a human blood vessel, generally only flow is set, monitored and calibrated, and although some manufacturers on the market provide reference flow rate values corresponding to the flow, the method is more suitable for design verification and factory inspection because the flow rate difference between the center of a pipeline and the vicinity of the wall of the pipeline is large and unstable. Secondly, the phantom is relatively complex to carry, assemble, detect and manipulate.

The demand of a string-type Doppler test piece as a transcranial Doppler calibration phantom is more and more urgent, the simulated blood in the string-type Doppler test piece is replaced by a string which moves circularly, the diameter of the string is generally not more than 0.5mm, the slightly rough surface of the string can simulate the action of a movement scatterer, and the generated Doppler signal has single frequency. However, due to the particularity of elastic deformation of the string, the string is often loosened after several times of calibration tests, even after one calibration test, and the replacement of the string is required, so that the replacement of the string has technical requirements, and the operator cannot replace the string by himself, which causes the bottleneck of popularization of the test piece in subsequent maintenance work.

Therefore, when the calibration test of the ultrasonic transcranial Doppler blood flow analyzer is carried out, the calibration test needs to be combined with IEC 61206 + 1993 ' ultrasonography, continuous wave Doppler system, test procedure ' and the Chinese people's republic of China medical and drug industry standard YY/T0705 + 2008/IEC 61206: a string-type Doppler test piece recommended by a third special Doppler test piece 3.1.1 of 1993 continuous ultrasonic wave Doppler system test program is used as a standard to design a string-type Doppler test piece device and solve the problem of frequent change of strings.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the present invention provides a string doppler test piece device.

In order to achieve the above object, the utility model adopts the following technical scheme:

a chord line type Doppler test piece device structurally comprises a controller unit, a chord line type test piece unit and a medium groove;

the controller unit is used for controlling the whole device to work, and the chord type test piece unit is electrically connected;

the controller unit, the string type test piece unit and the medium groove are mechanically connected;

the medium groove is a rectangular groove, and the upper part of the medium groove is opened.

The string type test piece unit mainly comprises a stepping motor, a motor driving turntable, an upper guide wheel, a string, a lower guide wheel and a base in structure;

the rotating shaft of the stepping motor is directly inserted into the central hole of the motor driving turntable and is fixed by screws;

the upper guide wheel is fixed on one side surface in the medium groove through a structural part;

the lower guide wheel is directly fixed on the base;

the strings are arranged around the motor driving turntable, the upper guide wheel and the lower guide wheel, and the distance between the parallel strings is set to be 2.0 mm;

the base is fixed at the bottom of the medium groove.

Further, the upper guide wheel and the lower guide wheel are fixed pulleys.

Further, the motor driving turntable is a disc with the outer diameter of 500 mm;

the motor drive turntable is provided with a round shaft with a central hole and an outer diameter of 10mm, and the side surface of the round shaft is provided with a threaded hole for installing a rotating shaft of a screw fixed stepping motor.

Further, the base forms an inclination angle of 60 degrees along the horizontal direction;

the base is provided with a sliding cover, the lower guide wheel is fixed on the sliding cover, and the sliding cover and the base are fixed through a dovetail groove;

the base is internally provided with a spring, one end of the spring props against the base, and the other end of the spring props against the sliding cover.

The controller unit mainly comprises a processor of model STM32F103C8T6 for driving the stepping motor provided on the string type test piece unit to rotate.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural diagram of a string type test piece unit according to the present invention;

FIG. 3 is a schematic cross-sectional view of the base of the string type test piece unit of the present invention;

in fig. 1: A. a controller unit; B. a chord line type test piece unit; C. and a medium groove.

In fig. 2: 1. a stepping motor; 2. the motor drives the disc; 3. an upper guide wheel; 4. a string; 5. a lower guide wheel; 6. A base.

In fig. 3: 7. a sliding cover; 8. a spring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The controller unit a mainly comprises a processor of model STM32F103C8T 6.

The stepping motor 1 is selected, and the Rayleigh 42 is selected as the stepping motor 42CM 04.

The string 4 is made of nylon with the diameter not more than 0.5 mm.

The string type Doppler test piece device shown in figure 1 is composed of a controller unit A, a string type test piece unit B and a medium groove C. The controller unit A is used for controlling the whole device to work, driving the stepping motor 1 arranged on the chord line type test piece unit B to rotate, and is arranged outside one side of the medium groove C; the string type test piece unit B is arranged at the bottom of the inner side of the medium groove C and forms an inclination angle of 60 degrees with the bottom surface of the medium groove C through the arranged base 6; the medium groove C is rectangular and is provided with an opening at the upper part.

A string type test piece unit B of the string type doppler test piece device shown in fig. 2 is composed of a stepping motor 1, a motor driving turntable 2, an upper guide wheel 3, a string 4, a lower guide wheel 5 and a base 6. The rotating shaft of the stepping motor 1 is directly inserted into the central hole of the circular shaft of the motor driving turntable 2 and is fixed by screws; the upper guide wheel 3 is fixed inside one side of the medium groove C through a structural part; the lower guide wheel 5 is fixed on a sliding cover 7 arranged on the base 6; the strings 4 are arranged around the motor-driven rotating disc 2, the upper guide wheel 3 and the lower guide wheel 5, and the distance between the parallel strings 4 is set to be 2.0 mm.

The base 6 of the chord line type doppler test piece device shown in fig. 3 is provided with a sliding cover 7, and the lower guide wheel 5 is fixed on the sliding cover 7; the sliding cover 7 and the base 6 are fixed through a dovetail groove; a spring 8 is arranged in the base 6, one end of the spring 8 props against the base (6), and the other end of the spring 8 props against the sliding cover 7.

When in use: according to above-mentioned structure schematic diagram, accomplish the utility model discloses an installation because the 8 one end of spring that base 6 was equipped with withstands base 6, and the sliding closure 7 is withstood to the other end, and lower leading wheel 5 is fixed again on sliding closure 7, consequently finishes at complete installation, because spring 8's elastic deformation effect, in using many times, can play the effect of automatic tight string of a thread 4, prevents that the string of a thread is lax after 4 uses many times.

Injecting a proper amount of water or sodium chloride solution serving as a liquid medium into the medium groove C, and ensuring that the string type test piece unit B is completely immersed in the liquid medium; fixing a probe of an ultrasonic transcranial Doppler blood flow analyzer to be calibrated right above a string 4 through a clamping frame, immersing a radiation surface of the probe below a liquid medium, and aligning an ultrasonic beam axis with the string 4; the controller unit A) drives a stepping motor 1 arranged on the string type test piece unit B to work, the stepping motor 1 drives a motor to drive a turntable 2 to rotate so as to drive strings 4 wound on the turntable to transmit, and the strings 4 pass through an upper guide wheel 3 and a lower guide wheel 5 and finally return to the motor to drive the turntable 2 to complete circular transmission.

During calibration, the simulated blood is replaced by the string 4 in circular motion, the blood flow is replaced by the motion speed of the string 4, the blood flow direction is replaced by the motion direction of the string 4, and the motion speed of the string 4 can be calculated by the motor rotating speed, the motor-driven turntable and the guide wheel parameters.

Claims (6)

1. A string type Doppler test piece device is characterized by structurally comprising a controller unit, a string type test piece unit and a medium groove;

the controller unit is used for controlling the whole device to work, and the chord type test piece unit is electrically connected;

the controller unit, the string type test piece unit and the medium groove are mechanically connected;

the medium groove is a rectangular groove, and the upper part of the medium groove is opened.

2. A chordal doppler test piece device as claimed in claim 1, wherein said chordal test piece unit mainly comprises a stepping motor, a motor-driven turntable, an upper guide wheel, a string, a lower guide wheel and a base in structure;

the rotating shaft of the stepping motor is directly inserted into the central hole of the motor driving turntable and is fixed by screws;

the upper guide wheel is fixed on one side surface in the medium groove through a structural part;

the lower guide wheel is directly fixed on the base;

the strings are arranged around the motor driving turntable, the upper guide wheel and the lower guide wheel, and the distance between the parallel strings is set to be 2.0 mm;

the base is fixed at the bottom of the medium groove.

3. A chordal doppler test device as claimed in claim 2 wherein said motor driven turntable is a disc with an outer diameter of 500 mm;

the motor drive turntable is provided with a round shaft with a central hole and an outer diameter of 10mm, and the round shaft is provided with a threaded hole.

4. A chordal doppler test device as claimed in claim 2, wherein the upper and lower guide wheels are fixed pulleys.

5. A chordal doppler test device as claimed in claim 2, wherein said mount is inclined at 60 ° horizontally;

the base is provided with a sliding cover, the lower guide wheel is fixed on the sliding cover, and the sliding cover and the base are fixed through a dovetail groove;

the base is internally provided with a spring, one end of the spring props against the base, and the other end of the spring props against the sliding cover.

6. A chordal doppler test piece device as claimed in claim 1, wherein said controller unit essentially comprises a processor of the type STM32F103C8T6 for driving rotation of a stepper motor provided with the chordal test piece unit.

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