CN215985624U - Measuring device for damping characteristic of micro blood sample - Google Patents
Measuring device for damping characteristic of micro blood sample Download PDFInfo
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- CN215985624U CN215985624U CN202122212837.0U CN202122212837U CN215985624U CN 215985624 U CN215985624 U CN 215985624U CN 202122212837 U CN202122212837 U CN 202122212837U CN 215985624 U CN215985624 U CN 215985624U
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- blood sample
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Abstract
The utility model discloses a device for measuring the damping characteristic of a trace blood sample, which aims to monitor the blood coagulation process of thrombus by adopting a film negative stiffness displacement measurement mode, and has better stability, and the technical scheme is as follows: the utility model provides a measuring device of trace blood sample damping characteristic, includes the frame, be equipped with a fixed pulley structure in the frame, the below of fixed pulley structure is equipped with the measuring cup and makes progress bellied elastic film, the structural suspension of fixed pulley has a string, the one end of string is connected with elastic film's top, the other end is equipped with first foil, first foil is located the measuring cup, the measuring cup reciprocates through a drive module drive, elastic film's top is equipped with the second foil, be equipped with the sensor that is used for detecting the displacement value of second foil in the frame, belong to medical equipment technical field.
Description
Technical Field
The utility model belongs to the technical field of medical equipment, and particularly relates to a device for measuring the damping characteristic of a trace blood sample.
Background
The thromboelastogram instrument is a medical instrument for analyzing a blood coagulation process by measuring damping characteristics of a blood sample, and the working principle of the instrument is as follows: the motor drives the test cup bearing the blood sample to rotate at a certain angle and period, once the thrombus is formed, the metal probe arranged in the blood sample test cup is subjected to the shear stress of the sample and rotates left and right, the rotation of the metal probe is sensed by the non-contact angle rotation sensor and is converted into electric quantity to be processed by the processor, and a coagulation curve is formed.
CN112903985A discloses detection device of thrombelastogram appearance, including base, stand, first mount, second mount, the silk that dangles, first gear pole, second gear pole, spacing pole subassembly, bowl cover, test cup and revolving stage, wherein, first gear pole includes first gear and first locating lever, and the second gear pole includes second gear, second locating lever and transmission mounting, and spacing pole subassembly includes spacing pole and spring, and the bowl cover includes circular boss, connecting tooth and bowl cover body.
Most of the prior art still adopt the suspension wires for measurement, the suspension wires play a crucial role in the thromboelastography instrument, the suspension wires with uneven torque and too large or too small torque constant cannot obtain a correct coagulation curve, the suspension wires have small diameter, high precision requirement and very large processing difficulty, the condition of uneven radial diameter of the middle part is easy to occur in the manufacturing process, and the yield is low.
Therefore, the technical problems to be solved by the application are as follows: how to provide a measuring device for the damping characteristic of a micro-sample of blood without a suspension wire.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a device for measuring the damping characteristic of a trace blood sample, which aims to monitor the thrombus coagulation process by adopting a film negative stiffness displacement measurement mode and has better stability.
According to a first aspect of the utility model, a device for measuring the damping characteristic of a micro blood sample is provided, which comprises a frame, wherein a fixed pulley structure is arranged on the frame, a measuring cup and an upward convex elastic film are arranged below the fixed pulley structure, a string is suspended on the fixed pulley structure, one end of the string is connected with the top of the elastic film, the other end of the string is provided with a first metal sheet, the first metal sheet is positioned in the measuring cup, the measuring cup is driven by a driving module to move up and down, the top of the elastic film is provided with a second metal sheet, and a sensor for detecting the displacement value of the second metal sheet is arranged on the frame.
In a particular embodiment of the utility model, the second foil is arranged in the centre of the top of the elastic film, the second foil being connected to a string.
In a particular embodiment of the utility model, the fixed pulley structure comprises a first fixed pulley and a second fixed pulley, the first fixed pulley is located above the measuring cup, the second fixed pulley is located above the elastic membrane, and the height of the first fixed pulley is greater than the height of the second fixed pulley.
In a specific embodiment of the present invention, the output end of the driving module is provided with a temperature control table, and the measuring cup is placed in the temperature control table to maintain the temperature.
In a specific embodiment of the present invention, a metal outer frame is covered above the elastic film, and the metal outer frame is provided with a first through hole for the string to pass through.
In a specific embodiment of the utility model, a magnet capable of adsorbing the second metal sheet is arranged on one side of the metal outer frame close to the elastic film, a second through hole is arranged at the center of the magnet, and the first through hole and the second through hole are coaxial.
In a specific embodiment of the present invention, a first weight block is disposed on the string between the first fixed pulley and the first metal sheet, and a second weight block is disposed on the string between the second fixed pulley and the second metal sheet.
In a particular embodiment of the utility model, the string is a metal string.
In a particular embodiment of the utility model, the sensor is an eddy current sensor.
One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:
the utility model adopts a film negative stiffness displacement measurement mode to replace the traditional suspension wire corner measurement, the stability is better, the processing difficulty is also reduced, generally speaking, the driving module drives the measuring cup to move up and down, the first metal sheet can move up and down along with the friction force, the elastic film is pulled through the fixed pulley structure, the second metal sheet also moves up and down, and the sensor detects and records the displacement value of the second metal sheet, thereby forming the blood coagulation curve.
Drawings
The utility model is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a partially enlarged view of a in fig. 1 of embodiment 1 of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other elements or indirectly connected through one or more other elements or in an interactive relationship between two elements.
The following disclosure provides many different embodiments, or examples, for implementing different aspects of the utility model.
Example 1
Referring to fig. 1 to 2, in an embodiment of the present invention, a device for measuring a damping characteristic of a micro blood sample includes a frame 1, wherein a fixed pulley structure 2 is disposed on the frame 1, a measuring cup 3 and an upward-protruding elastic film 4 are disposed below the fixed pulley structure 2, a string 5 is suspended on the fixed pulley structure 2, one end of the string 5 is connected to the top of the elastic film 4, and the other end of the string 5 is provided with a first metal sheet 6, the first metal sheet 6 is located in the measuring cup 3, the measuring cup 3 is driven by a driving module 7 to move up and down, the top of the elastic film 4 is provided with a second metal sheet 8, and a sensor 9 for detecting a displacement value of the second metal sheet 8 is disposed on the frame 1;
when the measuring device is used, the driving module 7 drives the measuring cup 3 to move up and down, and because the blood in the measuring cup 3 has viscosity, friction force can be generated between the blood and the first metal sheet 6, so that the first metal sheet 6 moves up and down along with the measuring cup 3, meanwhile, the string 5 pulls the elastic film 4 through the fixed pulley structure 2 to drive the second metal sheet 8 to move up and down, and the sensor 9 detects and records the displacement value of the second metal sheet 8 to finish measurement;
due to the negative rigidity performance of the elastic film 4, the top of the elastic film 4 can generate larger displacement only by slightly pulling the string 5, a correct coagulation curve can be obtained, the stability is better, the traditional suspension wire corner measuring mode is replaced, the suspension wire with high processing difficulty is not needed, and the manufacturing cost is reduced.
Preferably, the second metal sheet 8 is arranged at the center of the top of the elastic film 4, and the second metal sheet 8 is connected with the string 5, so that the string 5 can directly pull the second metal sheet 8, the displacement value obtained by the sensor 9 is the most accurate, and the coagulation curve formed later is the most accurate.
In a specific embodiment, the string 5 is a metal string, and the metal string has high tensile stiffness, and can transmit the up-and-down movement of the first metal sheet 6 to the elastic film 4 without causing the elastic film 4 to be deformed due to the tensile of the string 5 itself.
Preferably, the sensor 9 is an eddy current sensor, the eddy current sensor can detect the distance between the probe of the eddy current sensor and the second metal sheet 8, and the eddy current sensor 9 can detect and record the distance in real time along with the up-and-down movement of the second metal sheet 8; of course, other sensors 9 capable of detecting the displacement of the second metal sheet 8 are applicable, and this embodiment is not limited thereto.
In a particular embodiment of the utility model, the fixed pulley structure 2 comprises a first fixed pulley 21 and a second fixed pulley 22, the first fixed pulley 21 is located above the measuring cup 3, the second fixed pulley 22 is located above the elastic membrane 4, and the height of the first fixed pulley 21 is greater than that of the second fixed pulley 22; due to the limited space, two fixed pulleys are used for the transition of the string 5, the height of the second fixed pulley 22 being smaller than the height of the first fixed pulley 21, so that the up-and-down movement of the first foil 6 is more easily transmitted to the elastic membrane 4.
In this embodiment, a temperature control table 71 is disposed at an output end of the driving module 7, and the measuring cup 3 is placed in the temperature control table 71 to maintain the temperature, so that the temperature of blood is maintained within a certain temperature value during the measurement process.
In a specific embodiment, a concave cavity is formed in the temperature control table 71, and the measuring cup 3 is fixed in the concave cavity and attached to the concave cavity, so that when the temperature control table 71 moves up and down, the measuring cup 3 only moves up and down and does not shake left and right.
Specifically, the driving module 7 may be a screw module, an air cylinder or an electric cylinder.
In a specific embodiment of the present invention, a metal outer frame 41 is covered above the elastic film 4, the metal outer frame 41 is provided with a first through hole 42 for the string 5 to pass through, the metal outer frame 41 can prevent foreign objects from touching the elastic film 4, which further affects the displacement of the second metal sheet 8, and meanwhile, the metal outer frame 41 can also play a role of electromagnetic shielding, thereby ensuring the normal operation of the sensor 9.
Preferably, a magnet 43 capable of adsorbing the second metal sheet 8 is disposed on one side of the metal outer frame 41 close to the elastic membrane 4, a second through hole 44 is disposed at the center of the magnet 43, the first through hole 42 and the second through hole 44 are coaxial, and the magnet 43 can cooperate with the second metal sheet 8 to enable the elastic membrane 4 to obtain a larger elastic coefficient, thereby improving the measurement accuracy.
Preferably, a first counterweight 23 is arranged on the string 5 between the first fixed pulley 21 and the first metal sheet 6, and a second counterweight 24 is arranged on the string 5 between the second fixed pulley 22 and the second metal sheet 8; first balancing weight 23 and second balancing weight 24 make elastic film 4 produce predeformation, make elastic film 4 be in linear workspace through adjusting first balancing weight 23 and second balancing weight 24, and simultaneously, whole fixed pulley structure 2 can be stabilized to first balancing weight 23 and second balancing weight 24.
In this embodiment, a controller is disposed on the frame 1, the driving module 7, the sensor 9, and the temperature control platform 71 are electrically connected to the controller, and each component is controlled by the controller.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a measuring device of trace blood sample damping characteristic, includes frame (1), its characterized in that, be equipped with certain pulley structure (2) in frame (1), the below of fixed pulley structure (2) is equipped with measures cup (3) and bellied elastic film (4) that makes progress, hang on fixed pulley structure (2) and have a string (5), the one end and the top of elastic film (4) of string (5) are connected, the other end is equipped with first foil (6), first foil (6) are located measures cup (3), it reciprocates through a drive module (7) drive to measure cup (3), the top of elastic film (4) is equipped with second foil (8), be equipped with sensor (9) that are used for detecting the displacement value of second foil (8) on frame (1).
2. A device for measuring the damping characteristics of a micro-blood sample according to claim 1, characterized in that said second metal sheet (8) is arranged at the centre of the top of said elastic membrane (4), said second metal sheet (8) being connected to a string (5).
3. The device for measuring the damping characteristics of a micro-blood sample according to claim 1, characterized in that said fixed pulley structure (2) comprises a first fixed pulley (21) and a second fixed pulley (22), said first fixed pulley (21) being located above said measuring cup (3), said second fixed pulley (22) being located above said elastic membrane (4), the height of said first fixed pulley (21) being greater than the height of said second fixed pulley (22).
4. The device for measuring the damping characteristics of a micro-blood sample according to claim 1, wherein the output end of the driving module (7) is provided with a temperature control table (71), and the measuring cup (3) is placed in the temperature control table (71) to maintain the temperature.
5. The device for measuring the damping characteristics of a micro-blood sample according to claim 1, wherein a metal frame (41) is covered above the elastic membrane (4), and the metal frame (41) is provided with a first through hole (42) for the string (5) to pass through.
6. The device for measuring the damping characteristics of a micro-blood sample according to claim 5, wherein a magnet (43) capable of adsorbing the second metal foil (8) is arranged on one side of the metal outer frame (41) close to the elastic membrane (4), a second through hole (44) is arranged at the center of the magnet (43), and the first through hole (42) and the second through hole (44) are coaxial.
7. A device for measuring the damping characteristics of a micro-blood sample according to claim 3, wherein a first weight (23) is provided on the string (5) between the first fixed pulley (21) and the first metal sheet (6), and a second weight (24) is provided on the string (5) between the second fixed pulley (22) and the second metal sheet (8).
8. A device for measuring the damping characteristics of a micro-blood sample according to claim 1, characterized in that said string (5) is a metal string.
9. A device for measuring the damping characteristics of a micro-blood sample according to claim 1, characterised in that said sensor (9) is an eddy current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122212837.0U CN215985624U (en) | 2021-09-13 | 2021-09-13 | Measuring device for damping characteristic of micro blood sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122212837.0U CN215985624U (en) | 2021-09-13 | 2021-09-13 | Measuring device for damping characteristic of micro blood sample |
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| Publication Number | Publication Date |
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| CN215985624U true CN215985624U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122212837.0U Active CN215985624U (en) | 2021-09-13 | 2021-09-13 | Measuring device for damping characteristic of micro blood sample |
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- 2021-09-13 CN CN202122212837.0U patent/CN215985624U/en active Active
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