阅读说明：本技术 经表面检测球体囊内压与表面切线张力方法与设备 (Method and equipment for detecting internal pressure and surface tangent tension of spherical capsule through surface ) 是由 阮班珺 郭树忠 于 2019-09-23 设计创作，主要内容包括：一种经表面检测囊体内压与表面切线张力的方法与设备,其特征是：采用带推拉变应传感器的钝刃形测量头,其检测的F力可以换算为来自钝刃两侧张力T,从而量化出某一方向张力；以两支撑足与测量头形成半径测量单元,以复位归零的步进电机推动测量头与球体表面逐渐接近,至接触时,推拉传感器产生输出信号,触发电脑同步采集步进电机累计步数与推拉传感器输出数值,根据步进电机累计步数和其他常数,计算出囊体曲面半径,步进电机继续推动检测头压向皮肤和球体表面,电脑同步采集步进电机新增累计步数与推拉传感器输出数值,结合计算的曲面半径,计算囊性球囊内压力,实现对人体皮肤和囊体表面切线张力与压力测量。(A method and apparatus for detecting the internal pressure of capsule and the tangent tension of surface by surface features that: the force F detected by the blunt blade-shaped measuring head with the push-pull allergy sensor can be converted into tension T from two sides of the blunt blade, so that the tension in a certain direction is measured; the two supporting feet and the measuring head form a radius measuring unit, the measuring head is pushed to gradually approach the surface of the sphere by the reset return-to-zero stepping motor, when the measuring head is contacted with the surface of the sphere, the push-pull sensor generates an output signal to trigger the computer to synchronously acquire the accumulated step number of the stepping motor and the output value of the push-pull sensor, the curved surface radius of the balloon is calculated according to the accumulated step number of the stepping motor and other constants, the stepping motor continuously pushes the detecting head to press the skin and the surface of the sphere, the computer synchronously acquires the newly-increased accumulated step number of the stepping motor and the output value of the push-pull sensor, the pressure in the balloon is calculated by combining the calculated curved surface radius, and.)

1. a method and apparatus for detecting the internal pressure of capsule and the tangent tension of surface by surface features that: the device comprises a shell (1), a measuring component (2) and a calculation control unit (3); the radius measuring unit is formed by two supporting feet (1.7) of the shell (1) and a reset zero-resetting measuring head (2.11), when the measuring head (2.11) is pushed by a stepping motor (2.1) to gradually approach to the surface of a sphere from a zero position, a computer synchronously acquires the accumulated step number of the stepping motor and the output value of a push-pull sensor, when the measuring head (2.11) is in contact with the surface of the capsule, the push-pull sensor generates an output signal, and a singlechip is triggered to calculate the radius R = W2/2(H0-H1) + (H0-H1)/2 of the curved surface of the sphere at a measuring point according to the accumulated step number of the stepping motor and other constants; h0 is the perpendicular distance (unit is meter) between a connecting line of a measuring head (2.11) and two supporting feet (1.7) when the sliding block is in zero position, H1 is the distance (unit is meter) when the measuring head (2.11) moves from the zero position to contact with the curved surface of the capsule body, and W is the half-width (unit is meter) of the distance between the two supporting feet (1.7); the stepping motor continues to push the detection head to press the surface of the sphere, the computer synchronously acquires the newly increased accumulated step number of the stepping motor and the output value of the push-pull sensor, the measuring head stress F (unit N/m) measured by the push-pull sensor (2.9), F is 2TLCos theta which is PRlCos theta, wherein T = PR/2 (unit N/m), T is the curved surface tangential tension of the capsule body (unit N/m), L is the edge length of the blunt edge measuring head (unit m), P is the internal pressure of the capsule body (unit Pa), and theta is an included angle formed after the blunt edge presses the surface of the capsule body; converting and calculating T as F/2LCos theta, wherein the direction of the tension T is vertical to the blunt edge; p = F/PLCos θ; can be used for measuring the tangential tension and the internal pressure of the capsule body and the skin of the human body.

2. A method and apparatus for surface sensing of the internal pressure of a capsule and the tangential tension of a surface as claimed in claim 1, wherein: the upper end of the shell (1) is cylindrical, and the lower end is elliptical; the uppermost end is a single chip microcomputer chamber (1.1), a stepping motor chamber (1.2), a stepping motor fixing hole (1.3) and a stepping motor fixing groove (1.4) are connected with the single chip microcomputer chamber; a measuring chamber (1.5) is arranged downwards, and a guide rail fixing groove (1.6) is arranged on the oval side wall of the measuring chamber; the lowest end is provided with two supporting feet (1.7).

3. A method and apparatus for surface sensing of the internal pressure of a capsule and the tangential tension of a surface as claimed in claim 1, wherein: a stepping motor of a measuring component (2) is clamped into a stepping motor fixing groove (1.4) in a stepping motor chamber (1.2) of a shell (1) and is reinforced through a stepping motor fixing hole (1.4); a screw rod (2.2) of a stepping motor (2.1) pushes a sliding block (2.3) to move along a guide rail (2.4), a near limit switch (2.5) and a far limit switch sliding block (2.6) are installed on the side wall of a measuring chamber (1.5) of a shell (1), and a contact arm (2.7) on the sliding block (2.3) is arranged between the near limit switch (2.5) and the far limit switch sliding block (2.6); the tail end of a connecting rod (2.8) extending downwards from the sliding block (2.3) is fixedly connected with a push-pull force sensor (2.9), the other end of the push-pull force sensor (2.9) is connected with a measuring head (2.11) through a short arm (2.10), and the measuring head (2.11) is in a blunt edge shape.

4. A method and apparatus for surface sensing of the internal pressure of a capsule and the tangential tension of a surface as claimed in claim 1, wherein: a singlechip (1.1) of a calculation control unit (3) is arranged in a singlechip room of a shell (1), and a display screen (3.2) and a button (3.3) face upwards; the cable interface (3.4) is exposed from the side wall; the rechargeable battery (3.5) is arranged in a proper space of the shell (1).

Technical Field

The present invention relates to a method and equipment for detecting internal pressure of capsule body and surface tangent tension by means of surface, and is a second generation detector newly designed and developed on the basis of the first generation product of portable elastic soft capsule body internal pressure detector invented in the earlier patent 201210196575.6.

Background

The inventor has previously proposed 201210196575.6 patent application of portable elastic soft capsule intracapsular pressure tester, which has been granted and issued. The invention provides a detection test carried out after the instrument is developed, which can detect not only the internal pressure of a capsule body, but also the surface tangential tension of the capsule body, and provides an invention application 201410188759.7 'detection method for the internal pressure of a spherical capsule through the surface and the surface tangential tension' on the basis of a large amount of experimental data analysis. The test results listed in the invention application 201410188759.7 "method for detecting surface spherical sac internal pressure and surface tangent tension" show that 201210196575.6 "portable elastic soft sac internal pressure tester" detects that the displacement value W and the sac pressure P have poor linear relation, and are difficult to measure accurately, the circular pressing cap cannot determine the tension direction, and an additional sac radius detection tool is required.

For the poor linear relationship between the actual data of the displacement value (W) and the capsule pressure P and radius (R) detected by using the portable elastic soft capsule internal pressure determinator, the inventors carefully analyzed the variability of each parameter in the mathematical model W ═ α F ═ α (F1+ F2) ═ α (Tccos θ + Ps) ═ T α ccos θ + P α s ═ PR α 2 π rcos θ/2+ P α π R2 ═ P (R α 2 π rcos θ/2+ α π R2), where W = α F, α is the spring coefficient, F is the total force of the pressure cap, and F = F1+ F2; f1 is the component force of tangent tension T on the surface of the capsule body, and T = PR/2; f1= Tccos θ = PRccos θ/2, F2 is the force generated by the intracapsular pressure P, F2= Ps; capsule radius R, gland radius R, area s = π R2, gland perimeter c =2 π R; the included angle theta is found to be changed continuously because the spring is compressed continuously during detection, cos theta is the main reason of poor linear relation, and the model F1 and F2 are complex in mixed calculation and influence on relation calculation.

Therefore, the inventor carries out brand new design, adopts a blunt edge-shaped measuring head with a push-pull allergy sensor, reduces the area s of the measuring head to be ignored, eliminates the F2= Ps factor which can not distinguish the tension direction, replaces a round pressing cap which can not distinguish the direction with the blunt edge-shaped measuring head, detects the tension T from two sides of the blunt edge, can detect the tension direction, cancels a spring, replaces a strain gauge sensor with the spring, can ignore the deformation and also eliminates the influence of alpha coefficient; the radius measuring unit is formed by two supporting feet and the measuring head, the measuring head is pushed to gradually approach the surface of the skin or the sphere by a reset and return-to-zero stepping motor, the computer synchronously acquires the accumulated step number of the stepping motor, when the measuring head is contacted with the surface of the capsule body, the push-pull sensor generates an output signal, the computer is triggered to calculate the radius of the curved surface of the sphere according to the accumulated step number and other constants of the synchronously acquired stepping motor, the measuring head is continuously pushed to press the surface of the skin and the surface of the sphere by the stepping motor, the computer synchronously acquires the newly increased accumulated step number of the stepping motor and the output value of the push-pull sensor, the output value of the push-pull sensor with the same newly increased accumulated step number is taken, and the tangential; the final mathematical model is simplified as follows:

f is 2TLCos θ, where F is the pressure value measured by the measuring head, F is the component of the tangential tension T on the surface of the balloon, T = PR/2 (unit N/meter), and L is the edge length (unit m) of the blunt edge measuring head.

After the novel design is adopted, the tangential tension of the surface of the balloon body can be directly measured, the radius of the curved surface is calculated through automatic measurement, the internal pressure of the balloon body is further calculated, and the method can also be used for measuring the skin tension of a human body and predicting the danger of the striae gravidarum.

Disclosure of Invention

The invention relates to a method and a device for detecting the internal pressure of a capsule body and the surface tangential tension by a surface, which are the first generation products: a new generation detector of portable elastic soft capsule sac inner pressure tester with patent number 201210196575.6.

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

FIG. 1 is a schematic structural diagram of a method and apparatus for detecting the internal pressure of a capsule and the tangential tension of a surface by a surface;

FIG. 1A is a sectional view taken along line A of FIG. 1; FIG. 1B is a cross-sectional view taken along line B of FIG. 1; FIG. 1C is a partial cross-sectional view of FIG. 1;

FIG. 2 is a view of the components of the method and apparatus for surface sensing of balloon internal pressure and surface tangential tension;

fig. 3 and 3A are schematic views of the method and apparatus for detecting the pressure in the capsule and the tangential tension on the surface by surface measurement;

FIG. 4 is a schematic view of the principle of radius measurement of the method and apparatus for surface detection of balloon internal pressure and surface tangential tension;

FIG. 5 is a schematic diagram of the tangential tension and the balloon internal pressure measurement principle of the method and the device for surface detection of the balloon internal pressure and the surface tangential tension;

in the figure, a shell 1.1 a single chip microcomputer chamber 1.2 a stepping motor chamber 1.3 a stepping motor fixing groove 1.4 a stepping motor fixing hole 1.5 a measuring chamber 1.6 a guide rail fixing groove 1.7 a supporting foot 2 measuring component 2.1 a stepping motor 2.2 a screw 2.3 a slider 2.4 a guide rail 2.5 a near limit switch 2.6 a far limit switch 2.7 a contact arm 2.8 a connecting rod 2.9 a push-pull force sensor 2.10 a short arm 2.11 a measuring head 3 calculation control unit 3.1 a single chip microcomputer 3.2 a display 3.3 a button 3.4 a cable interface 3.5 a rechargeable battery R is a distance (in meters) from a zero position when a measuring head (2.11) and two supporting feet (1.7) are connected with a vertical distance (in meters) between the H1 measuring head (2.11) and a curved surface of the capsule (1.7) when the H1 measuring head (2.11) moves from the zero position to be contacted with the curved surface of the capsule (in meters) The unit is meter) W two support feet (1.7), the distance between the two support feet and the half width (the unit is meter) H2 measuring heads (2.11) move forward continuously from the contact point with the curved surface of the capsule body by the distance (the unit is meter) P pressure in the capsule body (the unit is Pa) L measuring head blunt edge length (the unit is meter) theta measuring head, and the thrust (the unit is N/meter) detected by F measuring head is measured by the included angle T capsule body curved surface tangential tension (the unit is N/meter) formed after the blunt edge presses.

The method and the device for detecting the internal pressure of the spherical sac passing through the surface and the surface tangential tension as shown in the figures 1, 1A, 1B, 1C and 2 comprise a shell (1), a measuring component (2) and a calculation control unit (3).

The method and apparatus for detecting the internal pressure of a spherical sac passing through the surface and the surface tangential tension as shown in fig. 1, 1A, 1B, 1C, 2, wherein the upper end of the shell (1) is cylindrical and the lower end is elliptical; the uppermost end is a single chip microcomputer chamber (1.1), a stepping motor chamber (1.2), a stepping motor fixing hole (1.3) and a stepping motor fixing groove (1.4) are connected with the single chip microcomputer chamber; a measuring chamber (1.5) is arranged downwards, and a guide rail fixing groove (1.6) is arranged on the oval side wall of the measuring chamber; the lowest end is provided with two supporting feet (1.7).

The method and the device for detecting the internal pressure of the spherical capsule and the surface tangent tension are shown in the figures 1, 1A, 1B, 1C and 2, the stepping motor of the measuring component (2) is clamped into a stepping motor fixing groove (1.4) in a stepping motor chamber (1.2) of a shell (1) and is reinforced by the stepping motor fixing hole (1.4); a screw rod (2.2) of a stepping motor (2.1) pushes a sliding block (2.3) to move along a guide rail (2.4), a near limit switch (2.5) and a far limit switch sliding block (2.6) are installed on the side wall of a measuring chamber (1.5) of a shell (1), and a contact arm (2.7) on the sliding block (2.3) is arranged between the near limit switch (2.5) and the far limit switch sliding block (2.6); the tail end of a connecting rod (2.8) extending downwards from the sliding block (2.3) is fixedly connected with a push-pull force sensor (2.9), the other end of the push-pull force sensor (2.9) is connected with a measuring head (2.11) through a short arm (2.10), and the measuring head (2.11) is in a blunt edge shape.

In the method and the device for detecting the internal pressure of the spherical surface capsule and the surface tangential tension, which are shown in fig. 1, 1A, 1B, 1C and 2, a single chip microcomputer (1.1) of a calculation control unit (3) is arranged in a single chip microcomputer chamber of a shell (1), and a display screen (3.2) and a button (3.3) face upwards; the cable interface (3.4) is exposed from the side wall; the rechargeable battery (3.5) is arranged in a proper space of the shell (1).

In the method and the device for detecting the internal pressure of the surface sphere bag and the surface tangent tension, which are shown in fig. 3, 3A and 4, when the method and the device are used, a power supply is turned on, a start key is pressed, a program drives the stepping motor (2.1) to rotate reversely, a contact arm (2.7) is contacted with a near limit switch (2.5), the position of a switch signal slider (2.3) returns to zero (fig. 3), the program drives the stepping motor (2.1) to rotate forwardly, and the step number of the stepping motor starts to be accumulated; the sliding block (2.3) pushes the measuring head (2.11) to move towards the far switch for H1 distance and then to contact with the surface of the capsule body (figure 3A), push-pull force signals F are generated by the tangential tension T of the curved surface of the capsule body, the value of F is recorded by the single chip machine, and the step number accumulated value of the stepping motor moving for H1 distance is recorded; h0 is the vertical distance between the detection head and the connecting line of the two support feet when the detection head is at the zero position, and W is the half width of the two support feet; as shown in fig. 4, the curved surface radius R is calculated as:

R²=W²+(R-H)²

R²=W²+R²-2HR+H²

2HR=W²+H²

R=W²/2H+H/2

R=W²/2(H0-H1)+(H0-H1)/2。

fig. 3, fig. 3A, and fig. 5 show that the slider pushes the detection head to contact the surface of the capsule, and after the push-pull force signal F is generated by the tangential tension T of the curved surface of the capsule, the stepper motor continues to push the detection head forward by H2 distance, an included angle θ is generated between H2 and W, the tangential tension T = RP/2, R is the radius of the curved surface, P is the internal pressure of the capsule, and L is the blunt edge length of the detection head, then:

F=2TLCosθ；F=RPLCosθ

T=F/2LCosθ；P=F/PLCosθ。