CN106053590B - Magnetic suspension thrombus elasticity testing device - Google Patents
Magnetic suspension thrombus elasticity testing device Download PDFInfo
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- CN106053590B CN106053590B CN201610575082.1A CN201610575082A CN106053590B CN 106053590 B CN106053590 B CN 106053590B CN 201610575082 A CN201610575082 A CN 201610575082A CN 106053590 B CN106053590 B CN 106053590B
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- probe rod
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- 239000000725 suspension Substances 0.000 title claims abstract description 70
- 208000007536 Thrombosis Diseases 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 46
- 230000004907 flux Effects 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000005405 multipole Effects 0.000 claims description 28
- 230000006698 induction Effects 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 4
- 238000005339 levitation Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000275 quality assurance Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a magnetic suspension thrombus elasticity testing device which comprises a shell and a probe rod assembly, wherein the shell comprises a suspension frame and a base, the probe rod assembly is arranged on the base in a sliding manner, and the magnetic suspension thrombus elasticity testing device further comprises an axial magnetic suspension mechanism, a radial magnetic suspension mechanism and a magnetic flux detection device which are sequentially sleeved on the probe rod assembly from top to bottom. The magnetic suspension thrombus elasticity testing device adopts a magnetic suspension structure, and solves the problems of difficult processing, difficult quality assurance, higher manufacturing cost and the like of suspension wires in traditional equipment; the torsion state of the suspension wire is simulated by utilizing a pair of multipolar radial magnets, and the torsion rigidity of the simulated suspension wire is changed by accurately adjusting the distance between the radial magnets, so that the problem that parameters cannot be adjusted after the suspension wire is processed is solved; the magnetic flux sensor is used for collecting signals, so that the problems that the sensitivity of a signal system in the traditional eddy current detection is not high, errors are large during multi-channel collection, and the system is sensitive to the environmental temperature, levelness, vibration, machining and assembly precision and the like are solved.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a magnetic suspension thrombus elasticity testing device.
Background
The traditional thromboelastography instrument adopts torsion deformation of suspension wires to drive a metal induction sheet (eddy current detection) to measure the change of shear stress with time in the dynamic coagulation process, and is also a direct reflection of complex elastic modulus. The design is mature in technology and high in reliability, and a certain experience is accumulated after a plurality of years of clinical use; but the measurement accuracy is lower, and the error is larger when multiple channels are detected simultaneously; the suspension wires in the core component belong to sensitive and vulnerable devices, and have higher requirements on design, materials, processing technology, assembly and the like, and higher manufacturing cost; sensitive to environmental temperature, equipment levelness, base vibration, part machining and assembly precision and the like; the use and maintenance cost is high, the requirements of equipment debugging on the professional level are high, and the debugging process is complex; after the processing of the suspension wire is finished, all parameters cannot be changed, and the parameter adjustment can be processed only through a circuit or software, so that the cost of software and hardware of the circuit is increased; the sensitivity of a signal system in the traditional eddy current detection is not high, and the error is larger when a plurality of channels are collected, so that the signal system is sensitive to the environmental temperature, levelness, vibration, machining and assembly precision and the like.
Disclosure of Invention
In view of the above, the invention aims to provide a magnetic suspension thrombus elasticity testing device, which adopts a magnetic suspension structure to solve the problems of difficult processing, difficult quality assurance, higher manufacturing cost and the like of suspension wires in traditional equipment; the torsion state of the suspension wire is simulated by utilizing a pair of multipolar radial magnets, and the torsion rigidity of the simulated suspension wire is changed by accurately adjusting the distance between the radial magnets, so that the problem that parameters cannot be adjusted after the suspension wire is processed is solved; the magnetic flux sensor is used for collecting signals, so that the problems that the sensitivity of a signal system in the traditional eddy current detection is not high, errors are large during multi-channel collection, and the system is sensitive to the environmental temperature, levelness, vibration, machining and assembly precision and the like are solved.
The invention aims at realizing the following technical scheme:
the magnetic suspension thrombus elasticity testing device comprises a shell and a probe rod assembly, wherein the shell comprises a suspension frame and a base, the probe rod assembly is arranged on the base in a sliding mode, and the magnetic suspension thrombus elasticity testing device further comprises an axial magnetic suspension mechanism, a radial magnetic suspension mechanism and a magnetic flux detection device which are sequentially sleeved on the probe rod assembly from top to bottom.
Further, the probe rod assembly comprises a probe rod seat, an upper probe rod arranged at one end of the probe rod seat and a lower probe rod arranged at the other end of the probe rod seat.
Further, the axial magnetic suspension mechanism comprises an axial magnet, an axial magnet seat and a suction induction gasket which is axially arranged corresponding to the axial magnet.
Further, the axial magnet seat is further provided with a sliding plug, an adjusting spring and an adjusting screw, the sliding plug is arranged on the axial magnet seat in a sliding mode, one end of the sliding plug is contacted with the upper probe rod head penetrating through the axial magnet, the other end of the sliding plug is contacted with the adjusting spring, and the other end of the spring is contacted with the adjusting screw for adjusting the pretightening force of the adjusting spring.
Further, the overhang frame is further provided with a plurality of micrometer heads I for adjusting the radial position of the axial magnet base along the circumferential direction.
Further, the radial magnetic suspension mechanism comprises a multipole radial magnet I, a mounting seat which is arranged on the suspension frame in a sliding manner and used for fixing the multipole radial magnet I, and a multipole radial magnet II which is arranged corresponding to the multipole radial magnet I in the axial direction. Further, the probe rod seat is also provided with an induction piece for changing the spatial distribution of the magnetic field.
Further, a plurality of shielding rings are arranged on the mounting seat and close to the II end of the multipole radial magnet.
Further, a micrometer head II for adjusting the axial distance between the multipole radial magnet I and the multipole radial magnet II is further arranged on the suspension frame.
Further, the magnetic flux detection device comprises a plurality of magnetic flux sensors, a circuit board and a plurality of operational amplifiers, wherein the circuit board is fixed on the base, the plurality of magnetic flux sensors are arranged on the side, close to the radial magnetic suspension mechanism, of the circuit board, and the plurality of operational amplifiers are arranged on the other side in a one-to-one correspondence mode.
The beneficial effects of the invention are as follows:
1. the magnetic suspension thrombus elasticity testing device provided by the invention adopts a magnetic suspension structure, the whole device has no vulnerable parts, the machining precision requirement of parts is low, and the design, the machining and the assembly are more convenient.
2. According to the magnetic suspension thrombus elasticity testing device provided by the invention, the torsion state of the suspension wire is simulated by utilizing the pair of multipolar radial magnets, the torsion rigidity of the simulated suspension wire is changed by accurately adjusting the distance between the radial magnets, and the problem that parameters cannot be adjusted after the suspension wire is processed is solved.
3. The magnetic suspension thrombus elasticity testing device provided by the invention adopts the magnetic flux sensor to detect the change of magnetic flux in space for signal acquisition, and can accurately represent the change of shear stress with time in the dynamic coagulation process.
4. The magnetic suspension thrombus elasticity testing device provided by the invention is highly integrated, has low requirements on operation and maintenance personnel, and is simple and convenient in debugging process.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a lower view of FIG. 1;
reference numerals:
11-a base; 12-a suspension frame; 21-a probe rod seat; 22-upper probe rod; 23-lower probe rod; 30-micrometer head I; 31-fixing the sleeve; 32-an adjusting knob; 33-sliding sleeve; 34-adjusting the screw; 35-an adjusting spring; 36-wave spring; 37-sliding plugs; 38-an axial magnet; 39-suction force sensing pads; 41-mounting seats; 42-multipole radial magnet I; 43-shielding ring; 44-multipole radial magnet II; 45-sensing piece; 46-micrometer head II; 51-magnetic flux sensor; 52-a circuit board; 53-operational amplifier.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
The magnetic suspension thrombus elasticity testing device shown in fig. 1-2 comprises a shell, a probe rod assembly, an adjusting sleeve assembly, an axial magnetic suspension mechanism, a radial magnetic suspension mechanism and a magnetic flux detection device, wherein the shell comprises a suspension frame 12 and a base 11, the suspension frame 12 is fixed on the base 11 through bolts, and an eccentric adjusting screw for adjusting the suspension frame 12 to be centered with the base 11 is further arranged on the base 11; the probe rod assembly is arranged on the base 11 in a sliding manner and comprises a probe rod seat 21, an upper probe rod 22 and a lower probe rod 23, wherein the upper probe rod 22 is connected with the probe rod seat 21 through threads, and the lower probe rod 23 is inserted into the probe rod seat 21 and is connected through a limiting pin shaft; the adjusting sleeve assembly used for adjusting the probe rod assembly to be in a working state and a standby state comprises an adjusting handle, an outer cylinder, an inner cylinder and a reset spring, wherein the outer cylinder is fixed at the lower end of the base through a locking screw; the axial magnetic suspension mechanism comprises an axial magnet 38, an axial magnet seat and a suction induction gasket 39 which is axially and correspondingly arranged with the axial magnet, the axial magnet seat comprises a fixed sleeve 31, a sliding sleeve 33 and an adjusting knob 32, the fixed sleeve 31 is fixed on the suspension frame 12, the sliding sleeve 33 is slidably arranged on the fixed sleeve 31, a plurality of wave springs 36 are further arranged between the sliding sleeve 33 and the fixed sleeve 31, the suction induction gasket 39 which is axially and correspondingly arranged with the axial magnet 38 is fixed on an upper probe rod 22 below the axial magnet 38, the upper end of the upper probe rod 22 passes through the axial magnet 38 to be in contact with a sliding plug 37 which is arranged in the sliding sleeve 33, the other end of the sliding plug 37 is in contact with an adjusting spring 35 which is used for balancing the magnetic suspension force applied to the probe rod assembly by the axial magnet 38, and the other end of the adjusting spring 35 is in contact with an adjusting screw 34 which is used for adjusting the pretightening force of the adjusting spring 35; the radial magnetic suspension mechanism comprises a multipole radial magnet I42, a mounting seat 41 which is arranged on the suspension frame 12 in a sliding manner and used for fixing the multipole radial magnet I42, and a multipole radial magnet II 44 on a fixed probe rod seat 21 which is arranged in an axial corresponding manner with the multipole radial magnet I42; the magnetic flux detection device comprises a plurality of magnetic flux sensors 51, a circuit board 52 and a plurality of operational amplifiers 53, wherein the circuit board 52 is fixed on the base 11, the plurality of magnetic flux sensors 51 are arranged on the side, close to the radial magnetic levitation mechanism, of the circuit board 52, and the plurality of operational amplifiers 53 are arranged on the other side in a one-to-one correspondence manner; the axial magnetic suspension mechanism in the embodiment has no vulnerable part, has low requirements on the machining precision of parts, is convenient to design, machine and assemble, and solves the problems of difficult machining, difficult quality assurance, high manufacturing cost and the like of suspension wires in traditional equipment; the radial magnetic suspension mechanism simulates the torsion state of the suspension wire by utilizing a pair of multipolar radial magnets, and the torsion rigidity of the simulated suspension wire is changed by accurately adjusting the distance between the radial magnets, so that the problem that parameters cannot be adjusted after the suspension wire is processed is solved; the magnetic flux detection device adopts a magnetic flux sensor to collect signals, so that the problems of low sensitivity of a signal system in the traditional eddy current detection, large error during multi-channel collection, sensitivity to environmental temperature, levelness, vibration, processing and assembly precision and the like are solved.
The overhang frame 11 in this embodiment is further provided with a plurality of micrometer heads i 30 for adjusting the radial position of the axial magnet holder in the circumferential direction. In the embodiment, two micrometer heads I30 are arranged together, and the included angle between the micrometer heads I30 is 90 degrees, so that the center position of the axial magnet seat can be finely adjusted from two mutually perpendicular radial directions.
The probe rod seat 21 in this embodiment is further provided with an induction piece 45 for changing the spatial distribution of the magnetic field. The induction piece 45 for changing the spatial distribution of the magnetic field in the embodiment is fixed on the probe rod base 21 and is positioned at the lower end of the multipole radial magnet II 44.
The mounting seat 41 in this embodiment is further provided with a plurality of shielding rings 43 near the end of the multipole radial magnet ii 44. In the embodiment, a plurality of shield rings 43 are provided on the mount between the multipole radial magnet i 42 and the multipole radial magnet ii 44 for adjusting the attraction force between the multipole radial magnet i 42 and the multipole radial magnet ii 44.
The suspension frame 12 in this embodiment is further provided with a micrometer head ii 46 for adjusting the axial distance between the multipole radial magnet i 42 and the multipole radial magnet ii 44. The micrometer head II 46 in the embodiment is used to fine tune the axial distance between the multipole radial magnet I42 and the multipole radial magnet II 44.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (3)
1. The magnetic suspension thrombus elasticity testing device comprises a shell and a probe rod assembly, wherein the shell comprises a suspension frame and a base, and the probe rod assembly is arranged on the base in a sliding manner, and is characterized in that: the probe rod assembly comprises a probe rod seat, an upper probe rod arranged at one end of the probe rod seat and a lower probe rod arranged at the other end of the probe rod seat, the axial magnetic suspension mechanism comprises an axial magnet, an axial magnet seat and a suction force induction gasket axially corresponding to the axial magnet, the axial magnet seat comprises a fixed sleeve, a sliding sleeve and an adjusting knob, the fixed sleeve is fixed on a suspension frame, the sliding sleeve is arranged on the fixed sleeve in a sliding manner, a plurality of wave springs are further arranged between the sliding sleeve and the fixed sleeve, the suction force induction gasket axially corresponding to the axial magnet is fixed on the upper probe rod below the axial magnet, the upper end of the upper probe rod passes through the axial magnet to be in contact with a sliding plug arranged in the sliding sleeve, the other end of the sliding plug is in contact with an adjusting spring for balancing the magnetic suspension force applied to the probe rod assembly by the axial magnet, and the other end of the adjusting spring is in contact with an adjusting screw for adjusting the pretightening force of the adjusting spring; the suspension frame is also provided with a plurality of micrometer heads I used for adjusting the central position of the axial magnet seat along the circumferential direction; the radial magnetic suspension mechanism comprises a multipole radial magnet I, an installation seat which is arranged on the suspension frame in a sliding manner and used for fixing the multipole radial magnet I, and a multipole radial magnet II which is arranged corresponding to the multipole radial magnet I in the axial direction and is fixed on the probe rod seat; the suspension frame is also provided with a micrometer head II for adjusting the axial distance between the multipole radial magnet I and the multipole radial magnet II; the magnetic flux detection device comprises a plurality of magnetic flux sensors, a circuit board and a plurality of operational amplifiers, wherein the circuit board is fixed on the base, the plurality of magnetic flux sensors are arranged on the side, close to the radial magnetic suspension mechanism, of the circuit board, and the plurality of operational amplifiers are arranged on the other side in a one-to-one correspondence mode.
2. The magnetic levitation thrombus elasticity test device of claim 1, wherein: and the probe rod seat is also provided with induction pieces for changing the spatial distribution of the magnetic field.
3. The magnetic levitation thrombus elasticity test device of claim 1, wherein: and a plurality of shielding rings are further arranged on the mounting seat close to the II end of the multipole radial magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610575082.1A CN106053590B (en) | 2016-07-20 | 2016-07-20 | Magnetic suspension thrombus elasticity testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610575082.1A CN106053590B (en) | 2016-07-20 | 2016-07-20 | Magnetic suspension thrombus elasticity testing device |
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| Publication Number | Publication Date |
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| CN106053590A CN106053590A (en) | 2016-10-26 |
| CN106053590B true CN106053590B (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610575082.1A Active CN106053590B (en) | 2016-07-20 | 2016-07-20 | Magnetic suspension thrombus elasticity testing device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970237B (en) | 2017-05-15 | 2018-08-17 | 深圳麦科田生物医疗技术有限公司 | A kind of handling cup device and thrombelastogram instrument |
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2016
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