CN112710421B - Micro-torque detection and calibration device and method for torsion meter of thromboelastogram instrument - Google Patents
Micro-torque detection and calibration device and method for torsion meter of thromboelastogram instrument Download PDFInfo
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- CN112710421B CN112710421B CN202011456611.9A CN202011456611A CN112710421B CN 112710421 B CN112710421 B CN 112710421B CN 202011456611 A CN202011456611 A CN 202011456611A CN 112710421 B CN112710421 B CN 112710421B
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- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000725 suspension Substances 0.000 claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 230000001939 inductive effect Effects 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims 1
- 230000003028 elevating effect Effects 0.000 description 5
- 239000000523 sample Substances 0.000 description 3
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 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
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0042—Force sensors associated with force applying means applying a torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
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Abstract
The invention discloses a micro-torque detection and calibration device and a micro-torque detection and calibration method for a torsion meter of a thromboelastogram instrument, wherein the device comprises a torsion meter suspension rod, a lifting table, a rack, a loading mechanism and a detection and calibration mechanism; the torsion meter suspension rod is connected with the top surface of the rack and is vertical to the top surface of the rack; the lifting platform is arranged on the rack in a lifting manner through a lifting mechanism and is positioned below the torsion meter suspension rod; the loading mechanism is arranged on the lifting platform and is used for loading torque to the torsion meter; the detection and calibration mechanism is arranged on the lifting platform, connected with the loading mechanism and used for calibrating the torque of the torsion meter; the calibration method is implemented based on the device. The invention aims to provide a micro-torque detection and calibration device and a micro-torque detection and calibration method for a torsion meter of a thromboelastography instrument, so as to solve the calibration problem of the torsion meter.
Description
Technical Field
The invention relates to the field of torsion meter detection and calibration devices, in particular to a micro-torque detection and calibration device for a torsion meter of a thromboelastogram instrument.
Background
The working principle of the thrombelastogram instrument is that a probe clamped by a thin metal wire is suspended in blood, when a blood clot is formed, the probe and a cup are adhered together, so that different torques are generated when the probe is suspended in the blood and rotates, and the accuracy of the torque value is important for the accuracy of the thrombelastogram instrument in detection. For this reason, a torsion meter specifically providing different torque values is required to meet the field inspection requirements. However, since no related device for calibrating the accuracy of the torsion meter is available at present, the accuracy of the detection result of the torsion meter is still difficult to determine.
Disclosure of Invention
The invention provides a micro-torque detection and calibration device of a torsion meter of a thromboelastogram instrument, which aims to solve the problem of precision calibration of the torsion meter.
In order to achieve the purpose, the invention adopts the following technical scheme.
A micro-torque detection and calibration device for a torsion meter of a thromboelastogram instrument comprises a torsion meter suspension rod, a lifting table, a rack, a loading mechanism and a detection and calibration mechanism; the torsion meter suspension rod is connected with the top surface of the rack and is vertical to the top surface of the rack; the lifting platform is arranged on the rack in a lifting manner through a lifting mechanism and is positioned below the torsion meter suspension rod; the loading mechanism is arranged on the lifting platform and is used for loading torque to the torsion meter; the detection and calibration mechanism is arranged on the lifting platform, connected with the loading mechanism and used for calibrating the torque of the torsion meter.
By adopting the scheme, the torsion meter mounting mechanism, the lifting platform, the lifting mechanism and the detection and calibration mechanism are arranged at the proper positions of the frame through the frame, and the torsion meter mounting mechanism, the lifting platform, the lifting mechanism and the detection and calibration mechanism are favorable for detecting the torsion of the torsion meter. One end of the torsion meter is fixed through a torsion meter mounting mechanism to form a suspension mounting, so that subsequent detection and calibration are facilitated. A loading mechanism is provided for loading the torsion meter with torque. And then the torsion meter is detected and calibrated by arranging a detection and calibration mechanism, so that the aim of calibrating the precision of the torsion meter is fulfilled.
Preferably, one end of the torsion meter suspension rod is suspended and is used for being in tight fit connection with the installation fixed end of the torsion meter. The torsion meter suspension rod is connected with the installation fixed end in a tight fit mode to enable the torsion meter shell to be in a static state, the torsion meter suspension wire can be guaranteed to be in a suspension state, the influence of other acting forces on the torsion meter suspension wire can be avoided, and the influence of detection and calibration accuracy can be avoided.
Preferably, the loading mechanism comprises a wire suspension chuck, a pull rod, a central precise rotating shaft, a wire wheel unit and a scale pan, wherein the central precise rotating shaft is rotatably connected with the lifting platform through a bearing; the suspension clamp is coaxially and fixedly connected with the central precise rotating shaft, the central precise rotating shaft is coaxial with the suspension rod of the torsion meter, and the suspension clamp is used for clamping the suspension end of the suspension wire of the torsion meter. After the suspension wire chuck is connected with the suspension end of the suspension wire of the torsion meter, the weight is added in the weight tray, the stay cord weight of the wire wheel unit generates displacement under the action of gravity, the pull rod correspondingly drives the central precise rotating shaft to rotate, and the rotating central precise rotating shaft loads torque on the suspension wire of the torsion meter through the suspension wire chuck, so that calibration loading is realized. The torque value is the product of the weight mass and the length of the force arm, and the length of the force arm is the distance from the connecting point of the pull rod and the pull rope to the axis of the central precise rotating shaft.
Preferably, the wire wheel unit is arranged on the lifting platform and is provided with two wire wheels; the pull rope and the circuit form an S shape and pass by the two wire wheels, wherein the pull rope passes by from the upper side of the wire wheel close to the scale pan and passes by from the lower side of the wire wheel close to the pull rod. The two sections of the pull ropes are arranged at the upper end and the lower end of the two wire wheels respectively, so that the pull ropes can be prevented from slipping off the wire wheels.
Preferably, the lifting mechanism comprises a lifting rod connected with the lifting platform, the upper end of the lifting rod is fixedly connected with a lifting handle, and the lifting handle is positioned above the top surface of the rack; and a lifting guide structure is also arranged between the lifting platform and the rack. The torsion meter is installed by moving the lifting platform up and down through the lifting mechanism, the torque of the torsion meter is detected by moving the lifting mechanism down, and the lifting handle is located above the top surface of the rack and is convenient for handle operation.
Preferably, the lifting guide structure comprises a guide rod and a guide sleeve, the guide rod is fixedly connected to the rack, and the guide sleeve is fixedly connected to the lifting table. Through setting up the lifter, the screw hole cooperation that sets up external screw thread and elevating platform on the lifter makes the elevating platform portable, and the rethread is confirmed the elevating platform with guide bar and frame fixed connection and can be followed the guide bar through the uide bushing and do and reciprocate.
Preferably, the lifting guide structure comprises two guide rods distributed at two opposite angles of the lifting platform, and each guide rod is matched with a guide sleeve. Make the elevating platform do along the guide arm and reciprocate through setting up two guide bars to can avoid the elevating platform to take place the skew, and the guide bar of being convenient for adopts the round bar structure, convenient processing.
Preferably, the detection and calibration mechanism comprises an inductive sensor armature sheet and an electric signal conversion circuit board, wherein the electric signal conversion circuit board is arranged on the upper side of the support on the lifting platform, and the inductive sensor armature sheet is arranged on the upper side of the electric signal conversion circuit board and connected with the central precise rotating shaft. The armature sheet of the inductive sensor is driven to rotate through the central precise rotating shaft, the rotating armature sheet of the inductive sensor generates inductive inductance, and a torque value is measured by outputting a digital signal through the electric signal conversion circuit board.
Preferably, the output end of the electric signal conversion circuit board is connected with a computer. The digital signal output by connecting the output end of the electric signal conversion circuit board with the computer can be directly displayed on the computer, and the computer can be used for calculating the average value according to the data measured for multiple times and calculating the variance SD of each torsion meter.
According to another aspect of the invention, the micro-torque detection and calibration method for the torsion meter of the thrombelastogram instrument detects the torque value after the torsion meter is lifted by the lifting platform and loaded, and the suspension wire chuck is lowered by 0.8-1.3 mm through the lifting mechanism.
The invention has the beneficial effects that: the torsion meter can detect torque in a static suspension state by arranging the torsion meter mounting mechanism and the lifting mechanism, and the accuracy in detection is improved. And through setting up the detection and calibration mechanism, add the standard weight in the weight pan, make the stay cord of the reel unit produce the displacement under the effect of the equilibrium force, and drive the tie rod connected with stay cord to move, and then drive the rotation of the accurate spindle of centre through the tie rod, the accurate spindle of centre drives the inductance type sensor armature plate to rotate, the inductance type sensor armature plate rotated produces the inductive inductance, output the digital signal and measure the torque value and display on the computer through the signal of telecommunication conversion circuit board. The torque detection and calibration precision of a torsion meter in the thrombelastogram instrument can be effectively improved.
Drawings
FIG. 1 is a perspective view of a micro-torque measurement calibration device of a thromboelastography device according to the present invention;
fig. 2 is a front view of a micro-torque detection calibration device of the thromboelastogram instrument.
Detailed Description
The invention will be further described with reference to the drawings, but the invention is not limited thereby within the scope of the embodiments described.
Reference numerals in the drawings of the specification include: the device comprises a lifting handle 1, a torsion meter suspension rod 2, a torsion meter 3, a suspension wire chuck 4, a pull rod 5, an inductive sensor armature sheet 6, an electric signal conversion circuit board 7, a central precise rotating shaft 8, a lifting platform 9, a rack 10, a wire wheel unit 11 and a scale pan 12.
Wherein, torsion-meter suspension rod 2 one end is unsettled and is used for being connected with the installation stiff end tight fit of torsion-meter 3. The loading mechanism comprises a suspension wire chuck 4, a pull rod 5, a central precise rotating shaft 8, a wire wheel unit 11 and a scale pan 12, wherein the central precise rotating shaft 8 is rotatably connected with a lifting platform 9 through a bearing, the wire wheel unit 11 comprises a wire wheel and a pull rope, the pull rope bypasses the wire wheel, one end of the pull rope is fixedly connected to the pull rod 5, the pull rod 5 is fixedly connected with the central precise rotating shaft 8, the pull rod 5 is vertical to the axis of the central precise rotating shaft 8, and the other end of the pull rope is connected with the scale pan 12 in a suspension manner; the suspension clamp 4 is coaxially and fixedly connected with the central precise rotating shaft 8, the central precise rotating shaft 8 is coaxial with the torsion meter suspension rod 2, and the suspension clamp 4 is used for clamping a suspension end of the torsion meter. The wire wheel unit 11 is arranged on the lifting platform 9 and is provided with two wire wheels; the pulling rope and the circuit form an S shape and are wound around two wire wheels, wherein the pulling rope is wound around the upper side of the wire wheel close to the scale pan and is wound around the lower side of the wire wheel close to the pull rod 5.
As shown in fig. 1, the lifting mechanism includes a lifting rod connected to the lifting platform 9, a lifting handle 1 is fixedly connected to the upper end of the lifting rod, and the lifting handle 1 is located above the top surface of the frame 10; a lifting guide structure is further arranged between the lifting platform 9 and the frame 10, obviously, the lifting rod is of a screw rod structure, a threaded hole matched with the screw rod is formed in the lifting platform 9, or a threaded sleeve matched with the screw rod is fixedly connected to the lifting platform 9. The lifting guide structure comprises a guide rod and a guide sleeve, the lifting rod pulls the lifting platform to move up and down when the lifting handle is rotated, and the guide rod is fixedly connected to the rack; the guide sleeve is fixedly connected to the lifting platform 9. The lifting guide structure comprises two guide rods distributed at two opposite angles of the lifting platform 9, and each guide rod is matched with a guide sleeve.
As shown in fig. 1 and 2, the detection and calibration mechanism includes an inductive sensor armature sheet 6, an electric signal conversion circuit board 7, the electric signal conversion circuit board 7 is installed on the upper side of the bracket on the lifting platform, and the inductive sensor armature sheet 6 is arranged on the upper side of the electric signal conversion circuit board 7 and connected with a central precision rotating shaft 8. Wherein, the output end of the electric signal conversion circuit board 7 is connected with a computer, and the measured torque value can be directly displayed on the computer.
Example 2, a micro-torque detection calibration method for a torsion meter of a thromboelastography instrument, and after the torsion meter 3 is lifted by a lifting platform and loaded, a suspension wire chuck 4 is descended by 0.8-1.3 mm through a lifting mechanism, and then a torque value is detected.
During specific installation detection, the lifting handle 1 is rotated firstly, the lifting device is lowered to a position which is 5-10 mm away from the bottom surface, then the suspension wires of the torsion meter are loaded into the suspension wire chuck 4, the lifting handle 1 is rotated again, and the suspension wire chuck 4 is lifted up to lift the torsion meter 3 and is connected with the suspension rod 2 of the torsion meter and is kept fastened. Then, the lifting handle 1 is rotated again to enable the lifting platform 9 to descend by 0.8-1.3 mm, the torsion meter 3 is in a suspension state at the moment, a standard weight corresponding to a torsion value is loaded on the scale 12, the pull rope of the wire wheel unit 11 is displaced under the action of a balance force, the pull rope drives the pull rod 5 to move, the pull rod 5 drives the central precise rotating shaft 8 to rotate, the central precise rotating shaft 8 drives the inductive sensor armature sheet 6 to rotate, the rotating inductive sensor armature sheet 6 generates inductive inductance, and a digital signal of the measured torsion value is output through the electric signal conversion circuit board 7. The output end of the electric signal conversion circuit board 7 is connected with a computer, and the relation between the rotation angle and the moment is calculated through the computer, so that the moment value is measured. The torsion meters 3 of various levels are measured 10 times respectively by adding standard weights, the average value is taken, and meanwhile, the variance SD of each torsion meter 3 is calculated, and the CV% value of the data is less than 0.2%.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection determined by the claims.
Claims (8)
1. The micro-torque detection and calibration device of the torsion meter of the thromboelastography instrument is characterized by comprising a torsion meter suspension rod (2), a lifting table (9), a rack (10), a loading mechanism and a detection and calibration mechanism;
the torsion meter suspension rod (2) is connected with the top surface of the rack and is vertical to the top surface of the rack;
the lifting platform (9) is arranged on the rack (10) in a lifting way through a lifting mechanism and is positioned below the torsion meter suspension rod (2);
the loading mechanism is arranged on the lifting platform (9) and is used for loading torque on the torsion meter;
the detection and calibration mechanism is arranged on the lifting platform (9), connected with the loading mechanism and used for calibrating the torque of the torsion meter;
the loading mechanism comprises a wire suspension chuck (4), a pull rod (5), a central precise rotating shaft (8), a wire wheel unit (11) and a scale plate (12), wherein the central precise rotating shaft (8) is rotatably connected with a lifting platform (9) through a bearing, the wire wheel unit (11) comprises a wire wheel and a pull rope, the pull rope bypasses the wire wheel, one end of the pull rope is fixedly connected to the pull rod (5), the pull rod (5) is fixedly connected with the central precise rotating shaft (8), the pull rod (5) is perpendicular to the axes of the central precise rotating shaft (8), and the scale plate (12) is connected to the other end of the pull rope in a suspension mode; the suspension clamp (4) is coaxially and fixedly connected with a central precise rotating shaft (8), the central precise rotating shaft (8) is coaxial with the torsion meter suspension rod (2), and the suspension clamp (4) is used for clamping a suspension end of the torsion meter;
the detection and calibration mechanism comprises an inductive sensor armature sheet (6) and an electric signal conversion circuit board (7), wherein the electric signal conversion circuit board (7) is arranged on the upper side of a support of the lifting platform, and the inductive sensor armature sheet (6) is arranged on the upper side of the electric signal conversion circuit board (7) and is connected with a central precise rotating shaft (8).
2. The micro-torque detection and calibration device for the torsion meter of the thromboelastography instrument according to claim 1, wherein one end of the torsion meter suspension rod (2) is suspended and is used for being in tight fit connection with the installation fixed end of the torsion meter (3).
3. The micro-torque detection and calibration device of the torque meter of the thromboelastogram instrument according to claim 1, characterized in that the reel unit (11) is arranged on a lifting platform (9), and the reel unit is provided with two reels; the pulling rope and the circuit form an S shape and pass by two wire wheels, wherein the pulling rope passes by from the upper side of the wire wheel close to the scale pan and passes by from the lower side of the wire wheel close to the pull rod (5).
4. The micro-torque detection and calibration device of the torsion meter of the thrombelastogram instrument according to claim 1, wherein the lifting mechanism comprises a lifting rod connected with a lifting platform (9), a lifting handle (1) is fixedly connected to the upper end of the lifting rod, and the lifting handle (1) is positioned above the top surface of the machine frame (10); and a lifting guide structure is also arranged between the lifting platform (9) and the rack (10).
5. The micro-torque detection and calibration device of the torsion meter of the thromboelastography machine according to claim 4, characterized in that the lifting guide structure comprises a guide rod and a guide sleeve, the guide rod is fixedly connected to the machine frame, and the guide sleeve is fixedly connected to the lifting table (9).
6. The micro-torque detection and calibration device for a torsion meter of a thromboelastography device according to claim 4, characterized in that the lifting guide structure comprises two guide rods distributed at two opposite corners of the lifting table (9), each guide rod being engaged with a guide sleeve.
7. The micro-torque detection and calibration device of the torsion meter of the thromboelastography instrument according to claim 1, characterized in that the output end of the electric signal conversion circuit board (7) is connected with a computer.
8. A micro-torque detection calibration method for a torsion meter of a thromboelastography instrument, which is implemented based on the device of any one of claims 1 to 7, wherein S1, the lifting device is lowered to a position 5 to 10mm away from the bottom surface; s2, making the lifting platform (9) descend by 0.8-1.3 mm; s3, loading a standard weight corresponding to the torsion value on the scale pan (12), and generating induction inductance by the armature sheet (6) of the inductive sensor; s4, outputting the digital signal of the torque value through the electric signal conversion circuit board (7); s5, the relationship between the rotation angle and the torque is calculated by the computer, and the torque value is measured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011456611.9A CN112710421B (en) | 2020-12-10 | 2020-12-10 | Micro-torque detection and calibration device and method for torsion meter of thromboelastogram instrument |
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| CN202011456611.9A CN112710421B (en) | 2020-12-10 | 2020-12-10 | Micro-torque detection and calibration device and method for torsion meter of thromboelastogram instrument |
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| CN112710421B true CN112710421B (en) | 2022-07-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114062703B (en) * | 2021-11-09 | 2025-09-19 | 阳普医疗科技股份有限公司 | Thrombus elastography detection module and detection method thereof |
| CN114910262A (en) * | 2022-06-16 | 2022-08-16 | 恪宁科技(上海)有限公司 | A thrombelastograph suspension wire stiffness coefficient calibration device and calibration method |
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| CN107144424A (en) * | 2017-06-22 | 2017-09-08 | 凌中鑫 | The detection method and system of thrombelastogram instrument pendency silk stiffness factor |
| CN108562731A (en) * | 2018-06-19 | 2018-09-21 | 重庆南方数控设备有限责任公司 | A kind of prover of calibration thrombelastogram instrument sense channel |
| CN208270580U (en) * | 2018-06-19 | 2018-12-21 | 重庆南方数控设备有限责任公司 | A kind of thrombelastogram instrument sense channel means of alignment |
| CN110987257A (en) * | 2019-12-17 | 2020-04-10 | 重庆南方数控设备股份有限公司 | Torsion sensing assembly suitable for thrombelastogram instrument |
| CN211347180U (en) * | 2019-12-17 | 2020-08-25 | 重庆南方数控设备股份有限公司 | Torque force induction assembly of thrombelastogram instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11644401B2 (en) * | 2017-01-26 | 2023-05-09 | Enicor Gmbh | Devices and methods for measuring viscoelastic changes of a sample |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144424A (en) * | 2017-06-22 | 2017-09-08 | 凌中鑫 | The detection method and system of thrombelastogram instrument pendency silk stiffness factor |
| CN108562731A (en) * | 2018-06-19 | 2018-09-21 | 重庆南方数控设备有限责任公司 | A kind of prover of calibration thrombelastogram instrument sense channel |
| CN208270580U (en) * | 2018-06-19 | 2018-12-21 | 重庆南方数控设备有限责任公司 | A kind of thrombelastogram instrument sense channel means of alignment |
| CN110987257A (en) * | 2019-12-17 | 2020-04-10 | 重庆南方数控设备股份有限公司 | Torsion sensing assembly suitable for thrombelastogram instrument |
| CN211347180U (en) * | 2019-12-17 | 2020-08-25 | 重庆南方数控设备股份有限公司 | Torque force induction assembly of thrombelastogram instrument |
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