CN212721289U - Capacitive angle measuring device and thrombelastogram instrument with same - Google Patents
Capacitive angle measuring device and thrombelastogram instrument with same Download PDFInfo
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- CN212721289U CN212721289U CN202021778021.3U CN202021778021U CN212721289U CN 212721289 U CN212721289 U CN 212721289U CN 202021778021 U CN202021778021 U CN 202021778021U CN 212721289 U CN212721289 U CN 212721289U
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Abstract
The utility model discloses a capacitanc angle measuring device and thrombelastogram appearance that has it, include: rotation module, measuring circuit and measuring component, measuring component includes: the probe can rotate over the static capacitor pole piece, two capacitors are formed between the rotary capacitor pole piece and the static capacitor pole piece, when the rotary capacitor pole piece is at an initial position, the two capacitors are equal in size, when the rotary capacitor pole piece rotates, the two capacitors are changed in size, one capacitor is increased, the other capacitor is decreased, the difference value of the two capacitors is in proportional relation with the rotating angle of the rotary capacitor pole piece, and the measuring circuit is electrically connected with the static capacitor pole piece to measure the difference value between the two capacitors. According to the utility model discloses angle measuring device can reduce the measuring degree of difficulty, and the linearity of electric capacity-angle is higher, improves measurement accuracy.
Description
Technical Field
The utility model belongs to the technical field of clinical examination technique and specifically relates to a capacitanc angle measuring device and thrombus elastogram appearance that has it are related to.
Background
In the related technology, the detection mode of the thrombelastogram instrument is a strain type or electromagnetic induction type, and the working process of a strain type sensor can introduce stress, which can affect the detection result; the electromagnetic induction type angle measuring device is commonly used, but the principle and the measuring circuit are complex, so that the generation cost is high, and when the measuring circuit is damaged, the repair difficulty is high, so that the practicability is low, and in addition, the inductance-angle linearity of the inductive angle measuring device is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a capacitive angle measuring device, which can reduce the difficulty of measurement, and has high linearity between capacitance and angle, thereby improving the measurement accuracy.
The utility model discloses still provide one kind and have capacitanc angle measuring device's thrombelastogram appearance.
According to the utility model discloses capacitanc angle measurement device of first aspect embodiment, capacitanc angle measurement device includes: rotation module, measuring circuit and measuring component, measuring component includes: the probe comprises a probe, a suspension wire, a static capacitor pole piece and a rotating capacitor pole piece, wherein one end of the probe is detachably connected with the rotating module, the rotating module is suitable for driving the probe to rotate, the suspension wire is connected with the other end of the probe, the probe can rotatably penetrate through the static capacitor pole piece, the rotating capacitor pole piece is connected with the probe, the rotating capacitor pole piece and the static capacitor pole piece are arranged at intervals so as to form two capacitors between the rotating capacitor pole piece and the static capacitor pole piece, when the rotating capacitor pole piece is at an initial position, the sizes of the two capacitors are equal, when the rotating capacitor pole piece rotates, one of the two capacitors is increased, the other capacitor is decreased, a difference value is formed between the two capacitors, and the size of the difference value of the two capacitors is in proportional relation with the rotating angle of the rotating capacitor pole piece, the measuring circuit is electrically connected with the static capacitor pole piece to measure the difference between the two capacitors.
According to the utility model discloses capacitanc angle measuring device, through the difference of measuring two electric capacities between rotation electric capacity pole piece and the static electric capacity pole piece to measure the turned angle of probe, can reduce the measuring degree of difficulty, and capacitanc angle measuring device's simple structure, can reduction in production cost, in addition, the linearity of electric capacity-angle is increased, thereby makes the angle that capacitanc angle measuring device measured goes out more accurate.
In addition, according to the utility model discloses a capacitanc angle measuring device can also have following additional technical characterstic:
in some embodiments of the present invention, the static capacitor pole piece comprises a double-layer circuit board, the double-layer circuit board comprises a first static pole piece and a second static pole piece, and the first static pole piece and the second static pole piece are respectively formed on two opposite sides of the double-layer circuit board, the rotating capacitor pole piece comprises: the capacitor comprises a first rotating capacitor pole piece and a second rotating capacitor pole piece, wherein the first rotating capacitor pole piece is vertically opposite to the first static pole piece, and the second rotating capacitor pole piece is vertically opposite to the second static pole piece.
Optionally, a projection of the first rotating capacitor pole piece on the horizontal plane coincides with a projection of the second rotating capacitor pole piece on the horizontal plane, and the first rotating capacitor pole piece and the second rotating capacitor pole piece rotate synchronously.
Optionally, a through hole is formed on the stationary capacitive pole piece, the probe is adapted to pass through the through hole, and the first stationary pole piece includes: first electrode slice, second electrode slice, third electrode slice and fourth electrode slice, the static pole piece of second includes: the first electrode plate is opposite to the fifth electrode plate in position, the second electrode plate is opposite to the sixth electrode plate in position, the third electrode plate is opposite to the seventh electrode plate in position, and the fourth electrode plate is opposite to the eighth electrode plate in position.
Further, the first electrode piece and the third electrode piece are symmetrical about the through hole and form a series capacitance C1 with the first rotating capacitor pole piece, the second electrode piece and the fourth electrode piece are symmetrical about the through hole and form a series capacitance C2 with the first rotating capacitor pole piece, the fifth electrode piece and the seventh electrode piece are symmetrical about the through hole and form a series capacitance C3 with the second rotating capacitor pole piece, and the sixth electrode piece and the eighth electrode piece are symmetrical about the through hole and form a series capacitance C4 with the second rotating capacitor pole piece.
Further, the first electrode pad is electrically connected with the fifth electrode pad, the second electrode pad is electrically connected with the sixth electrode pad, the third electrode pad is electrically connected with the seventh electrode pad, and the fourth electrode pad is electrically connected with the eighth electrode pad, so that the series capacitor C1 and the series capacitor C3 form a parallel capacitor C5, and the series capacitor C2 and the series capacitor C4 form a parallel capacitor C6.
In some embodiments of the invention, the first stationary pole piece and the second stationary pole piece have a fan-shaped profile, and the projection of the first stationary pole piece at the horizontal plane coincides with the projection of the second stationary pole piece at the horizontal plane.
Optionally, an overlapping area of the first rotating capacitor pole piece and the first stationary pole piece is not larger than an area of the first stationary pole piece. Further, the first rotating capacitor pole piece and the second rotating capacitor pole piece are both made of metal, and the distance between the first rotating capacitor pole piece and the second rotating capacitor pole piece is limited to be 1-4 mm.
The utility model discloses still provide a capacitance type angle measuring device's thrombelastogram appearance with above-mentioned embodiment.
According to the utility model discloses thrombelastogram appearance of second aspect embodiment includes: capacitive angle measuring device.
Therefore, the capacitance type angle measuring device is arranged on the thrombelastogram instrument, so that the thrombelastogram instrument can accurately measure the thrombelastogram, and whether a measurer suffers from diseases or not can be accurately judged.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a capacitive angle measurement device according to an embodiment of the present invention;
fig. 2 is a side view of a capacitive angle measurement device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rotating capacitor pole piece of the capacitive angle measuring device according to the embodiment of the present invention at an initial position;
fig. 4 is a schematic structural diagram of a rotating capacitor pole piece of the capacitive angle measuring device according to an embodiment of the present invention rotating by a certain angle;
fig. 5 is a schematic structural diagram of an angle after a plurality of electrode plates of the capacitive angle measuring device are attached to a static capacitor electrode plate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another angle after a plurality of electrode plates of the capacitive angle measuring device are attached to a static capacitor electrode plate according to an embodiment of the present invention.
Reference numerals:
a capacitive angle measuring device 100;
a measuring assembly 1; a probe 11; a suspension wire 12;
a static capacitor pole piece 13; a through hole 131;
a first stationary pole piece 132; a first electrode sheet 1321; a second electrode sheet 1322; a third electrode sheet 1323; a fourth electrode pad 1324;
a second stationary pole piece 133; a fifth electrode pad 1331; a sixth electrode sheet 1332; a seventh electrode sheet 1333; an eighth electrode pad 1334;
rotating the capacitor pole piece 14; a first rotating capacitor electrode 143; a second rotating capacitive pole piece 144;
a measuring circuit 3.
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 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do 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. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
According to the utility model discloses capacitanc angle measurement device 100 is the overlapping area who calculates between the plate electrode with the capacitance value to calculate the sensor of angle of deflection. According to a plate capacitance calculation formula:
therefore, the following steps are carried out: the size of the capacitor is in direct proportion to the overlapping area of the two capacitor plates, and for the fan-shaped capacitor plates, the overlapping area of the two capacitor plates is in direct proportion to the overlapping angle of the capacitor plates. Therefore, the capacitance is proportional to the overlapping angle of the two capacitor plates, and therefore, the angle between the two capacitor substrates is linear with the capacitance.
In general, a thromboelastography device includes: sample cup and drive module, specifically, the sample cup includes: the plasma measuring cup comprises a cup body and a cup cover, wherein the cup body is suitable for containing plasma to be measured, a driving module is connected with the cup body to drive the sample cup to rotate, and the driving module drives the sample cup to rotate by a corresponding angle in a specified period, for example, the driving module is set to rotate by 10 seconds, the driving module drives the sample cup to rotate +/-2.375 degrees in the 10 seconds, and then the driving module drives the sample cup to rotate back to an initial position. It can be understood that the cycle time and the rotation angle of the sample cup driven by the driving module are not limited here, and the actual requirement can be met.
In addition, the driving module may drive the sample cup to rotate by a motor, or may drive the sample cup to rotate by a gear, which is not limited herein.
A capacitive angle measurement device 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 6.
As shown in fig. 1 to 6, a capacitive angle measuring device 100 according to an embodiment of the present invention includes: rotation module, measuring circuit 3 and measuring component 1, wherein, measuring component 1 includes: probe 11, suspension wire 12, static capacitor pole piece 13 and rotating capacitor pole piece 14.
In particular, one end of probe 11 is detachably connected to a rotation module adapted to drive the probe in rotation, and a suspension wire 12 is connected to the other end of probe 11, it being understood that the rotation module may be understood as the overall configuration of the sample cup and the drive module. From this, after rotation module and probe 11 link to each other, the bowl cover can with the interior measuring plasma contact of cup, when drive module drive sample cup rotated, because the thrombus has certain elasticity for the thrombus can drive bowl cover and probe 11 and rotate. When the probe 11 rotates, the suspension wire 12 generates an opposite twisting force to counter the twisting force of the probe 11, so that the suspension wire 12 is twisted by a certain angle, wherein the twisting angle of the suspension wire 12 is equal to that of the probe 11, but the twisting angle of the suspension wire 12 is not easy to measure, therefore, the twisting angle of the suspension wire 12 is measured by measuring the twisting angle of the probe 11, and the difficulty in measuring the twisting angle of the suspension wire 12 is reduced. After the torsion angle of the suspension wire 12 is measured, the elasticity value of the thrombus to be measured can be estimated according to the torsion angle of the suspension wire 12.
The structure and operation of measuring the angle of twist of probe 11 is as follows: probe 11 is rotatably mounted through stationary capacitor plate 13, rotating capacitor plate 14 is connected to probe 11 adjacent to stationary capacitor plate 13, and the rotating capacitor pole piece 14 and the static capacitor pole piece 13 are arranged at intervals, so that two capacitors are formed between the rotating capacitor pole piece 14 and the static capacitor pole piece 13, wherein, when the rotary capacitor pole piece 14 is at the initial position, the two capacitors have the same size, and when the rotary capacitor pole piece 14 rotates, the two capacitors have the same size, one of the capacitance values is increased and the other capacitance value is decreased, so that a difference is formed between the two capacitances, and the difference value of the two capacitors is in proportional relation with the rotating angle of the rotating capacitor pole piece 14, the measuring circuit 3 is electrically connected with the static capacitor pole piece 13 to measure the difference value between the two capacitors, so that the angle of rotation of the rotating capacitive pole piece 14 relative to the stationary capacitive pole piece 13 can be measured.
That is to say, the rotating capacitor pole piece 14 is close to the static capacitor pole piece 13, and a certain distance is separated between the rotating capacitor pole piece 14 and the static capacitor pole piece 13, so that the rotating capacitor pole piece 14 and the static capacitor pole piece 13 can form a capacitor, the size of the capacitor depends on the overlapping area of the rotating capacitor pole piece 14 and the static capacitor pole piece 13, when the overlapping area is large, the capacitor is large, and when the overlapping area is reduced, the capacitor is reduced.
Wherein, through keeping apart certain setting with rotating capacitor pole piece 14 and static capacitor pole piece 13 for there is not any contact between static capacitor pole piece 13 and the rotating capacitor pole piece 14, thereby makes static capacitor pole piece 13 can not interfere rotating capacitor pole piece 14 and rotates, and then measuring circuit 3 can measure the difference of two electric capacities more accurately.
Furthermore, after the rotating capacitor pole piece 14 is connected with the probe 11, the probe 11 rotates to drive the rotating capacitor pole piece 14 to rotate, and after the rotating capacitor pole piece 14 rotates, the overlapping area of the rotating capacitor pole piece 14 and the static capacitor pole piece 13 changes, so that the sizes of two capacitors formed by the rotating capacitor pole piece 14 and the static capacitor pole piece 13 change. Furthermore, the measuring circuit 3 is electrically connected with the static capacitor pole piece 13, so that the measuring circuit 3 can measure the difference value of the two capacitors, and after the measuring circuit 3 measures the difference value of the two capacitors, the rotating angle of the rotating capacitor pole piece 14 relative to the static capacitor pole piece 13 can be calculated, so that the rotating angle of the probe 11 can be calculated, the twisting angle of the suspension wire 12 can be calculated, and the elastic force value of the measured thrombus can be obtained according to the twisting angle of the suspension wire 12.
The rotating capacitor pole piece 14 may be fixedly connected to the probe 11, and the rotating capacitor pole piece 14 may also be detachably connected to the probe 11, which is not limited herein.
According to the utility model discloses capacitanc angle measurement device 100 rotates the difference of two electric capacities between electric capacity pole piece 14 and the static electric capacity pole piece 13 through the measurement to measure probe 11's turned angle, can reduce the measuring degree of difficulty, and capacitanc angle measurement device 100's simple structure, can reduction in production cost. In addition, the linearity of the capacitance-angle is high, so that the angle measured by the capacitive angle device 100 is more accurate.
In some embodiments of the present invention, the static capacitor pole piece 13 comprises a double-layer circuit board, the double-layer circuit board comprises a first static pole piece 132 and a second static pole piece 133, and the first static pole piece 132 and the second static pole piece 133 are respectively formed on two opposite sides of the double-layer circuit board, the first static pole piece 132 is projected on the horizontal plane and the second static pole piece 133 is projected on the horizontal plane to coincide with each other.
For example, as shown in fig. 1 and fig. 2, a first stationary pole piece 132 is disposed on an upper side of the stationary capacitor pole piece 13, a second stationary pole piece 133 is disposed on a lower side of the stationary capacitor pole piece 13, the first stationary pole piece 132 and the second stationary pole piece 133 have the same shape, and the first stationary pole piece 132 and the second stationary pole piece 133 are disposed on the stationary capacitor pole piece 13 in a vertically corresponding manner, so that projections of the first stationary pole piece 132 and the second stationary pole piece 133 on a horizontal plane can be overlapped.
The rotating capacitive pole piece 14 includes: the first rotating capacitor pole piece 143 is opposite to the first stationary pole piece 132, the second rotating capacitor pole piece 144 is opposite to the second stationary pole piece 133, and the projection of the first rotating capacitor pole piece 143 on the horizontal plane is overlapped with the projection of the second rotating capacitor pole piece 144 on the horizontal plane.
For example, as shown in fig. 1 and 2, the first rotating capacitor pole piece 143 is disposed on the probe 11 and then above the stationary capacitor pole piece 13, such that the first rotating capacitor pole piece 143 is vertically opposite to the first stationary pole piece 132, and the second rotating capacitor pole piece 144 is disposed on the probe 11 and then below the stationary capacitor pole piece 13, such that the second rotating capacitor pole piece 144 is vertically opposite to the second stationary pole piece 133. The first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 have the same shape, so that the projections of the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 on the horizontal plane can be overlapped.
Further, the first rotating capacitor pole piece 143 rotates synchronously with the second rotating capacitor pole piece 144, that is, when the first rotating capacitor pole piece 143 rotates clockwise, the second rotating capacitor pole piece 144 also rotates clockwise, and the clockwise rotation angles of the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 are also equal. Similarly, when the first rotating capacitor plate 143 rotates counterclockwise by a certain angle, the second rotating capacitor plate 144 also rotates counterclockwise by an equal angle.
Optionally, a through hole 131 is formed on the stationary capacitive pole piece 13, the probe 11 is adapted to pass through the through hole 131, and the first stationary pole piece 132 includes: a first electrode sheet 1321, a second electrode sheet 1322, a third electrode sheet 1323 and a fourth electrode sheet 1324, the second stationary pole sheet 133 comprising: the first electrode piece 1321 is positioned opposite to the fifth electrode piece 1331, the second electrode piece 1322 is positioned opposite to the sixth electrode piece 1332, the third electrode piece 1323 is positioned opposite to the seventh electrode piece 1333, and the fourth electrode piece 1324 is positioned opposite to the eighth electrode piece 1334 in the vertical direction.
For example, as shown in fig. 5, the first electrode plate 1321 and the third electrode plate 1323 are symmetrical about the through hole 131, the second electrode plate 1322 and the fourth electrode plate 1324 are symmetrical about the through hole 131, in addition, the first electrode plate 1321 and the second electrode plate 1322 are separated by a certain distance, and the third electrode plate 1323 and the fourth electrode plate 1324 are separated by a certain distance, so that the two adjacent electrode plates do not affect each other, and therefore, when the rotating capacitor pole piece 14 rotates, changes of capacitance values formed by the two adjacent electrode plates and the rotating capacitor pole piece 14 respectively can be calculated more conveniently, and then the difference between the two capacitances can be subtracted to calculate the difference between the two capacitances.
When the rotating capacitive pole piece 14 is in the initial position, as shown in fig. 3, the rotating capacitive pole piece 14 forms the same capacitance values with the first electrode piece 1321, the third electrode piece 1323, the second electrode piece 1322 and the fourth electrode piece 1324, in other words, the overlapping areas of the rotating capacitive pole piece 14 with the first electrode piece 1321, the third electrode piece 1323, the second electrode piece 1322 and the fourth electrode piece 1324 are the same.
After the rotating capacitor pole piece 14 rotates clockwise by a certain angle, for example, as shown in fig. 4, the overlapping area of the rotating capacitor pole piece 14 and the first electrode piece 1321 and the overlapping area of the second electrode piece 1322 are not equal, specifically, the overlapping area of the rotating capacitor pole piece 14 and the second electrode piece 1322 are larger than the overlapping area of the rotating capacitor pole piece 14 and the first electrode piece 1321, so that the capacitance value formed by the rotating capacitor pole piece 14 and the second electrode piece 1322 is larger than the capacitance value formed by the capacitor pole piece and the first electrode piece 1321. Therefore, after the rotating capacitor pole piece 14 rotates, the capacitance between the rotating capacitor pole piece 14 and each electrode piece changes, and the measuring circuit 3 can measure the difference value of the capacitance, so that the rotating angle of the rotating capacitor pole piece 14 can be measured.
In some embodiments of the present invention, the first stationary pole piece 132 and the second stationary pole piece 133 have a profile that includes a fan shape, and the projection of the first stationary pole piece 132 in the horizontal plane and the projection of the second stationary pole piece 133 in the horizontal plane coincide, for example, as shown in fig. 5, not only is the projection of the first stationary pole piece 132 and the second stationary pole in the horizontal plane a fan shape, and the first stationary pole piece 132 and the second stationary pole piece include sub-electrode pieces that are also fan-shaped in shape, and each sub-electrode piece has an equal area, by setting the area of each sub-electrode piece to be equal, when the capacitor pole piece 14 is rotated to the initial position, the plurality of series capacitors are equal, when the rotating capacitor pole piece 14 rotates clockwise by 2 degrees, the capacitance value variation of the plurality of series capacitors, when the rotating capacitor pole piece 14 rotates anticlockwise by 2 degrees, the capacitance value variable quantities of the plurality of series capacitors are equal, so that the measurement difficulty and the calculation difficulty can be reduced.
When the rotating capacitor pole piece 14 is at the initial position, the overlapping area of the first rotating capacitor pole piece 143 and the first stationary pole piece 132 is not larger than the area of the first stationary pole piece 132 in the vertical direction, that is, when the rotating capacitor pole piece 14 is at the initial position, the overlapping area of the first rotating capacitor pole piece 143 and the first stationary pole piece 132 may be smaller than the area of the first stationary pole piece 132, or may be equal to the area of the first stationary pole piece 132.
In one example, the overlapping area of the first rotating capacitor pole piece 143 and the first stationary pole piece 132 is smaller than the area of the first stationary pole piece 132, so that when the first rotating capacitor pole piece 143 rotates by a small angle, the overlapping area of the first rotating capacitor pole piece 143 and one sub-pole piece (e.g., the first pole piece 1321) of the first stationary pole piece 132 is increased, so that the capacitance formed between the first rotating capacitor pole piece 143 and the first stationary pole piece 132 is increased, and at the same time, the overlapping area of the first rotating capacitor pole piece 143 and the other sub-pole piece (e.g., the second pole piece 1322) of the first stationary pole piece 132 is decreased, so that the capacitance formed therebetween is decreased.
Further, the first and third electrode pieces 1321 and 1323 are symmetrical about the through hole 131 and form a series capacitance C1 with the first rotary capacitor pole piece 143, the second and fourth electrode pieces 1322 and 1324 are symmetrical about the through hole 131 and form a series capacitance C2 with the first rotary capacitor pole piece 143, the fifth and seventh electrode pieces 1331 and 1333 are symmetrical about the through hole 131 and form a series capacitance C3 with the second rotary capacitor pole piece 144, and the sixth and eighth electrode pieces 1332 and 1334 are symmetrical about the through hole 131 and form a series capacitance C4 with the second rotary capacitor pole piece 144.
Referring to fig. 5 and 6, the first and third electrode sheets 1321 and 1323 form a series capacitor C1 with the first rotating capacitor pole piece 143, the second and fourth electrode sheets 1322 and 1324 form a series capacitor C2 with the first rotating capacitor pole piece 143, the fifth and seventh electrode sheets 1331 and 1333 form a series capacitor C3 with the second rotating capacitor pole piece 144, the sixth and eighth electrode sheets 1332 and 1334 form a series capacitor C4 with the second rotating capacitor pole piece 144, and further, by electrically connecting the first and fifth electrode sheets 1321 and 1331, the second and sixth electrode sheets 1322 and 1332, the third and seventh electrode sheets 1323 and 1333, and the fourth and eighth electrode sheets 1324 and 1334, parallel capacitors C5, C2 and C4 may be formed between the C1 and C3, and thus, after the rotating capacitor pole piece 14 rotates, the difference between the parallel capacitor C5 and the parallel capacitor C6 can be measured, so that the rotation angle of the probe 11 can be conveniently judged.
In the above example, when the active capacitor pole piece is rotated clockwise, C1 and C3 both decrease, causing C5 to also decrease, while C2 and C4 both increase, causing C6 to also increase. When the active capacitor pole piece is rotated counterclockwise, C1 and C3 both increase, causing C5 to also increase, and C2 and C4 both decrease, causing C6 to also decrease.
Therefore, a parallel capacitor is formed between the rotating capacitor pole piece 14 and the static capacitor pole piece 13, so that the capacitance value between the rotating capacitor pole piece 14 and the static capacitor pole piece 13 can be increased, and when the rotating capacitor pole piece 14 rotates by a small angle, the difference value of the capacitance between the rotating capacitor pole piece 14 and the static capacitor pole piece 13 can be calculated, and the measurement precision of the capacitive angle measurement device 100 can be improved.
Further, the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 are both made of metal, that is, the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 may be made of copper, the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 may also be made of iron, the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 may also be made of aluminum, and of course, the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 may also be made of other kinds of metal, which is not limited herein.
In addition, the distance between the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 is limited to be 1-4 mm, that is, the distance between the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 ranges from 1-4 mm, for example, the distance between the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 may be 1mm, 2mm, 2.5mm, 3mm, 4mm, without limitation. The distance between the first rotating capacitor pole piece 143 and the second rotating capacitor pole piece 144 is limited to 1-4 mm, so that the overall structure of the capacitive angle measuring device 100 is compact.
It can be understood that the capacitance is inversely proportional to the distance between the two capacitor plates, that is, when the distance between the first rotating capacitor plate 143 and the upper side of the stationary capacitor plate 13 and the distance between the second rotating capacitor plate 144 and the lower side of the stationary capacitor plate 13 are larger, the capacitance between the first rotating capacitor plate 143 and the upper side of the stationary capacitor plate 13 and the capacitance between the second rotating capacitor plate 144 and the lower side of the stationary capacitor plate 13 are smaller. If the capacitance is small, the capacitance change is small when the rotating capacitance pole piece 14 rotates by a small angle, so that the capacitance value cannot be detected by the measuring circuit 3, and further the measuring range of the capacitive angle measuring device 100 is small and the measuring precision is not high.
The utility model discloses still provide a capacitance type angle measurement device 100's thrombelastogram appearance with above-mentioned embodiment.
According to the utility model discloses thrombelastogram appearance includes: the capacitive angle measuring device 100 is provided in the thrombelastogram machine, so that the thrombelastogram machine can accurately measure the elasticity of the thrombi, and whether a measurer suffers from a disease can be accurately determined.
Other constructions and operations of the thromboelastography device according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "some embodiments," "optionally," "further," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
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 invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A capacitive angle measurement device, comprising: rotation module, measuring circuit and measuring component, measuring component includes:
one end of the probe is detachably connected with the rotating module, the rotating module is suitable for driving the probe to rotate, and the suspension wire is connected with the other end of the probe;
the probe can rotatably penetrate through the static capacitor pole piece, the rotating capacitor pole piece is connected with the probe, the rotating capacitor pole piece and the static capacitor pole piece are arranged at intervals so as to form two capacitors between the rotating capacitor pole piece and the static capacitor pole piece,
wherein, when the rotating capacitor pole piece is at the initial position, the two capacitors are equal in size, when the rotating capacitor pole piece rotates, one capacitance value is increased, the other capacitance value is decreased, so that a difference value is formed between the two capacitors, and the difference value of the two capacitors is in proportional relation with the rotating angle of the rotating capacitor pole piece,
the measuring circuit is electrically connected with the static capacitor pole piece to measure the difference between the two capacitors.
2. The capacitive angle measurement device of claim 1,
the static capacitor pole piece comprises a double-layer circuit board, the double-layer circuit board comprises a first static pole piece and a second static pole piece, the first static pole piece and the second static pole piece are respectively formed on two opposite side surfaces of the double-layer circuit board,
the rotating capacitor pole piece comprises: the capacitor comprises a first rotating capacitor pole piece and a second rotating capacitor pole piece, wherein the first rotating capacitor pole piece is vertically opposite to the first static pole piece, and the second rotating capacitor pole piece is vertically opposite to the second static pole piece.
3. The capacitive angle measurement device of claim 2, wherein a projection of the first rotating capacitive pole piece in a horizontal plane coincides with a projection of the second rotating capacitive pole piece in a horizontal plane, and the first rotating capacitive pole piece and the second rotating capacitive pole piece rotate synchronously.
4. The capacitive angle measurement device of claim 2, wherein a through hole is formed in the stationary capacitive pole piece, the probe adapted to pass through the through hole,
the first stationary pole piece comprises: a first electrode sheet, a second electrode sheet, a third electrode sheet and a fourth electrode sheet,
the second stationary pole piece comprises: a fifth electrode sheet, a sixth electrode sheet, a seventh electrode sheet and an eighth electrode sheet,
in the vertical direction, the first electrode plate is opposite to the fifth electrode plate, the second electrode plate is opposite to the sixth electrode plate, the third electrode plate is opposite to the seventh electrode plate, and the fourth electrode plate is opposite to the eighth electrode plate.
5. The capacitive angle measurement device of claim 4,
the first electrode piece and the third electrode piece are symmetrical about the through hole and form a series capacitor C1 with the first rotating capacitor pole piece, the second electrode piece and the fourth electrode piece are symmetrical about the through hole and form a series capacitor C2 with the first rotating capacitor pole piece, the fifth electrode piece and the seventh electrode piece are symmetrical about the through hole and form a series capacitor C3 with the second rotating capacitor pole piece, and the sixth electrode piece and the eighth electrode piece are symmetrical about the through hole and form a series capacitor C4 with the second rotating capacitor pole piece.
6. The capacitive angle measurement device of claim 5,
the first electrode pad is electrically connected with the fifth electrode pad, the second electrode pad is electrically connected with the sixth electrode pad, the third electrode pad is electrically connected with the seventh electrode pad, and the fourth electrode pad is electrically connected with the eighth electrode pad, so that the series capacitor C1 and the series capacitor C3 form a parallel capacitor C5, and the series capacitor C2 and the series capacitor C4 form a parallel capacitor C6.
7. The capacitive angle measurement device of claim 2,
the first static pole piece and the second static pole have fan-shaped shapes, and the projection of the first static pole piece on the horizontal plane is coincident with the projection of the second static pole piece on the horizontal plane.
8. The capacitive angle measurement device of claim 7,
the overlapping area of the first rotating capacitor pole piece and the first static pole piece is not larger than the area of the first static pole piece.
9. The capacitive angle measurement device of claim 2, wherein the first and second rotating capacitive pole pieces are each comprised of metal, and wherein a distance between the first and second rotating capacitive pole pieces is defined to be between 1 and 4 mm.
10. A thromboelastography device, comprising:
an angle measurement device, the angle measurement device being a capacitive angle measurement device according to any one of claims 1-9.
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