A lumen volume sensing device and its use in breath training

Abstract

The application discloses a kind of pipe cavity volume sensing device and its application in breath training, belong to the field of measuring respiratory flow device, it is equipped with the annular moving plate of sticking sliding in the inside of pipe body, annular moving plate has hollow conical cylinder extending to the direction of pipe body entrance;Annular moving plate is also slid with guide sleeve and guide slide rod, the guide slide rod is fixed on bottom cover, and bottom cover is connected to the tail end of pipe body;Reset spring is arranged between guide slide rod and annular moving plate end face;Annular moving plate and pipe body are provided with a plurality of arc pieces, and arc piece is provided with arc piece contact point in pairs in the end face towards the inner wall of pipe body, and pipe body is provided with conducting sleeve at the position corresponding to arc piece contact point, and arc piece contact point arranged in pairs is connected with controller by wire respectively, and controller has indicating lamp. The application can detect the change of gas volume in pipe, ensure the acquisition of signal and mutual correction while ensuring the stable movement of structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of measuring respiratory flow devices, and in particular, it relates to a lumen volume sensing device and its application in breath training. BACKGROUND

[0002] In the prior art, the measurement of vital capacity mainly includes the following ways: Referring to the patent literature with the patent number CN214965561U, it discloses an exhalation type spirometer, and specifically discloses the following technical content: composed of a cubic structure, the cubic structure maintains an inverted bottle through a support, and the outlet of the inverted bottle has a valve-controlled droplet device; the center of one side of the cubic structure is provided with an exhalation nozzle, so that when the user exhales air through it, the speed of the exhaled air is transmitted to the fluid droplet. When the colored droplet falls into the detachable and replaceable recording device, it determines the distance indicating the speed of the exhaled air. The side of the cubic structure is covered with a transparent material to avoid distortion in the measurement of exhaled air speed and volume flow.

[0003] The above structure adopts the transmission mode of exhaled air and fluid droplets, and the colored droplet falls into the detachable and replaceable recording device to determine the distance indicating the speed of the exhaled air. The above structure is prone to large errors and is not easy to determine the accuracy of vital capacity.

[0004] At the same time, the prior art also provides the patent literature with the patent number CN116269299A, which discloses a one-second forced exhalation volume measurement method and device based on millimeter wave radar, and specifically discloses the following technical content: the method includes: collecting echo data of a human body performing a lung function test by using a millimeter wave radar; extracting a breathing signal from the echo data, and intercepting a signal segment of a forced exhalation process from the breathing signal; finding a key point in the signal segment of the forced exhalation process, and calculating a relative value of forced vital capacity and a relative value of one-second volume based on the key point; and calculating the one-second forced exhalation volume of the human body based on the relative value of forced vital capacity, the relative value of one-second volume, and body feature data. In the embodiment of the present application, the characteristics of low cost, small size, and non-invasion of privacy of the millimeter wave radar are combined, the echo signal reflected from the human body is received, the motion condition of the surface of the human body is non-contact sensed, and low-cost, convenient, and non-contact measurement of the one-second forced exhalation volume of the human body is realized.

[0005] However, the applicant believes that the above structure is complex, and also adopts an indirect measurement form (millimeter wave radar collects echo signals), which can improve the accuracy to a certain extent, but the signal capture and processing are complex and not suitable for use in daily detection. SUMMARY

[0006] The purpose of the present application is to provide a kind of lumen volume sensing device and its application in breath training, which can detect the change of gas volume in pipe, ensure the acquisition and mutual correction of signal while ensuring the stable movement of structure.

[0007] To achieve the above purpose, the present application is realized by the following technical scheme:

[0008] A kind of lumen volume sensing device in the present application, including pipe body, the inside of the pipe body is provided with the ring-shaped moving plate of fitting sliding, the ring-shaped moving plate is ring-shaped plate body, hollow conical barrel is integrally arranged at the inside edge position of ring-shaped moving plate, the hollow conical barrel extends to the inlet of pipe body;The end face of the ring-shaped moving plate away from hollow conical barrel is provided with guide sleeve, guide sleeve is evenly distributed on ring-shaped moving plate around the central axis of ring-shaped moving plate;Guide sleeve extends away from the direction of ring-shaped moving plate, guide slide is slidably arranged in the inside of guide sleeve, the guide slide is fixed on bottom cover, bottom cover is connected to the tail end of pipe body;Reset spring is arranged between the end face of guide slide away from bottom cover and the end face of ring-shaped moving plate;A plurality of arc pieces are arranged between the ring-shaped moving plate and the pipe body, the end face of the arc piece towards the inner wall of pipe body is provided with arc piece contact point in pairs, the pipe body is provided with conductive sleeve at the position corresponding to arc piece contact point, and the pair of arc piece contact points are connected with controller by wires respectively, and the controller has indicator light.

[0009] As one of the preferred technical solutions, in the present application, the bottom end of the arc piece is connected with the bottom cover through the arc piece connecting seat, and the top end of the arc piece is connected with the inner wall of the ring-shaped moving plate through the conical cylinder bottom frame.

[0010] As one of the preferred technical solutions, in the present application, the guide slide is distributed with a plurality of linear grooves on the circumferential side wall, the carbon film resistor is placed in the linear groove, and the guide sleeve is provided with a conductive limiting end corresponding to the carbon film resistor at the inlet end, and the conductive limiting end and the carbon film resistor are connected with the controller by wires respectively.

[0011] As one of the preferred technical solutions, in the present application, the arc piece is machined with arc piece groove at the end face away from the arc piece contact point, and the length of the arc piece groove is the same as the length of the arc piece contact point.

[0012] As one of the preferred technical solutions, in the present application, the guide slide and the ring-shaped moving plate are provided with spring seat body at the corresponding positions, and the spring seat bodies on the guide slide and the ring-shaped moving plate are respectively sleeved with both ends of the reset spring.

[0013] As one of the preferred technical solutions, in the application, the end face of the annular moving plate towards the inlet end of the pipe body is processed with an annular plate groove, which is distributed in the circumferential direction of the annular moving plate.

[0014] As one of the preferred technical solutions, in the application, the pipe body has a pipe body tapered end matched with the hollow conical barrel, the closed end of the pipe body tapered end is integrally arranged with a pipe mouth connecting end, the pipe mouth connecting end is connected with a flat mouth connecting end, and the flat mouth connecting end is integrally arranged with a flat mouth; the pipe body is communicated with an exhaust hole on the side close to the bottom cover.

[0015] As one of the preferred technical solutions, in the application, the pipe body is provided with a holding sleeve on the circumferential outer wall, and the holding sleeve has an annular groove for a user to hold.

[0016] The application of the pipe cavity volume sensing device in breath training.

[0017] Compared with the prior art, the application has the beneficial effects that:

[0018] The application can realize stable movement and stable reset of the annular moving plate through relative movement of the annular moving plate and the pipe body and through the mutually matched structure, and can realize acquisition and capture of signals through the mutually matched structure in the process of stable movement and reset of the annular moving plate, without affecting the stable work of the above structure. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the application.

[0020] Figure 2 is a perspective view of the application after the bottom cover is removed.

[0021] Figure 3 is Figure 2 a partial enlarged view of part I in the application.

[0022] Figure 4 is a front view of the application.

[0023] Figure 5 is Figure 4 a sectional view in the position and direction shown by A-A.

[0024] Figure 6 is Figure 5 a partial enlarged view of part II in the application.

[0025] In the figure: 1, bottom cover; 2, exhaust hole; 3, tube body; 4, holding sleeve; 5, tapered end of tube body; 6, tube mouth connecting end; 7, flat mouth connecting end; 8, flat mouth; 9, guide slide rod; 10, carbon film resistor; 11, conductive limiting end; 12, guide sleeve; 13, conductive sleeve; 14, spring seat; 15, return spring; 16, arc piece connecting seat; 17, arc piece; 18, arc piece contact; 19, annular moving plate; 20, annular plate groove; 21, hollow tapered cylinder; 22, tapered cylinder base; 23, arc piece groove. DETAILED DESCRIPTION

[0026] The technical solutions described in the present application will be further described and illustrated in conjunction with the drawings and examples. Example 1

[0027] Reference Figures 1 to 6 A tube cavity volume sensing device, comprising a tube body 3, the tube body 3 is a hollow cylindrical structure, the top end and the bottom end of the tube body 3 are open, a bottom cover 1 is connected at the open position of the bottom end of the tube body 3, and the connection position of the bottom cover 1 and the tube body 3 is sealed.

[0028] An annular moving plate 19 is slidably arranged inside the tube body 3, and the circumferential outer wall of the annular moving plate 19 is attached to the inner wall of the tube body 3. A hollow tapered cylinder 21 is integrally arranged at the inner edge position of the annular moving plate 19, and the hollow tapered cylinder 21 extends towards the inlet of the tube body 3; a guide sleeve 12 is connected to the end face of the annular moving plate 19 away from the hollow tapered cylinder 21, and the guide sleeves 12 are uniformly distributed on the annular moving plate 19.

[0029] A guide slide rod 9 is slidably arranged inside the guide sleeve 12, the bottom end of the guide slide rod 9 is fixed to the bottom cover 1, the top end of the guide slide rod 9 extends into the guide sleeve 12, a return spring 15 is arranged between the top end of the guide slide rod 9 and the end face of the annular moving plate 19, and the two ends of the return spring 15 are respectively connected to the annular moving plate 19 and the guide slide rod 9 at the corresponding positions.

[0030] The annular moving plate 19 is provided with a conical bottom frame 22 at the middle position, the annular moving plate 19 is connected with one end of the arc-shaped sheet 17 through the conical bottom frame 22, the other end of the arc-shaped sheet 17 is gathered on the arc-shaped sheet connecting seat 16, and the arc-shaped sheet connecting seat 16 is connected with the bottom cover 1. The arc-shaped sheet 17 is uniformly distributed around the central axis of the annular moving plate 19, the arc-shaped sheet 17 has an end face parallel to the inner wall section of the pipe body 3, a pair of arc-shaped sheet contacts 18 are arranged at the position of the end face, the pair of arc-shaped sheet contacts 18 are respectively connected with the controller through wires, the inner wall of the pipe body 3 is provided with a conductive sleeve 13 at the position corresponding to the arc-shaped sheet contact 18, the conductive sleeve 13 is embedded in the inner wall of the pipe body 3, and the conductive sleeve 13 is a continuous or discontinuous metal cylinder structure, the arc-shaped sheet contact 18 cooperates with the conductive sleeve 13 to realize the formation of a conductive path in the controller, and the indicator light on the controller is lit.

[0031] The arc-shaped sheet 17 is an elastic plate body, and an arc-shaped sheet groove 23 corresponding in length to the arc-shaped sheet 17 is further processed on the arc-shaped sheet 17. The pipe body 3 is provided with an exhaust hole 2 at a position away from the inlet, i.e. a position close to the base 1, and the exhaust hole 2 communicates with the space inside the pipe body 3. Embodiment 2

[0032] Referring to Figures 1 to 6 An annular moving plate 19 is provided with a plurality of ring plate grooves 20 distributed on the end face towards the inlet of the pipe body 3, and the cross section of the ring plate groove 20 is arc-shaped. The ring plate grooves 20 are uniformly distributed on the annular moving plate 19 and distributed in the circumferential direction of the hollow conical cylinder 21.

[0033] The pipe body 3 is integrally provided with a pipe body conical end 5 at the inlet, and the pipe body conical end 5 can cooperate with the hollow conical cylinder 21 to realize the guiding effect of the airflow.

[0034] The pipe body conical end 5 is integrally provided with a pipe mouth connecting end 6 at the inlet end, the pipe mouth connecting end 6 has a threaded structure and can be connected with a flat mouth connecting end 7 through the threaded structure, the flat mouth connecting end 7 is integrally provided with a flat mouth 8, and the cross section of the flat mouth 8 is a flat rectangular structure. A holding sleeve 4 is further provided on the outer wall of the pipe body 3, the holding sleeve 4 can be made of rubber material, and grooves or lines for holding are processed on the holding sleeve 4.

[0035] The structure and connection relationship of the remaining part are the same as those described in embodiment 1, and to avoid tedious writing, they will not be described here. Those skilled in the art can understand the technical solutions described in this embodiment on the basis of embodiment 1. Embodiment 3

[0036] Continuing to refer to Figures 1 to 6A kind of pipe cavity volume sensing device, wherein the guide slide rod 9 is distributed with several straight grooves in circumference, the bottom end of straight groove penetrates the bottom end of guide slide rod 9, and there is a certain distance between the top end of straight groove and the top end of guide slide rod 9.Carbon film resistance 10 is laid in the bottom of straight groove of guide slide rod 9, and is arranged along the length direction of straight groove, the carbon film resistance 10 is slidably arranged with conductive limit end 11, the conductive limit end 11 is located at the opening position of guide sleeve 12, and is connected with guide sleeve 12 by connecting piece, the connecting piece is connected with controller by wire, the carbon film resistance 10 is also electrically connected with controller, carbon film resistance 10 and conductive limit end 11 can form the electric circuit of resistance change in controller, and controller outputs voltage of 0~5V by the resistance change, and the relative position of annular moving plate 19 and pipe body 3 is calibrated according to the different output voltages.The controller uses microcomputer controller, which can realize the determination of loop conduction and resistance-voltage conversion, and has data storage module to facilitate the comparison of obtained signal and stored signal, and also has signal output module to facilitate the output of comparison result.

[0037] The structure and connection relationship of the remaining part are the same as those described in embodiment 1 or embodiment 2, to avoid tedious writing, which will not be described here. Those skilled in the art can understand the technical solutions described in this embodiment on the basis of the above embodiments. Embodiment 4

[0038] An application of a pipe cavity volume sensing device described in embodiment 1 to embodiment 3 in breath training.

[0039] On the basis of the above embodiments, the technical features involved and the functions and effects of the technical features in the technical solutions are described in detail in the following paragraphs to help those skilled in the art fully understand the technical solutions and reproduce them.

[0040] In this application, the pipe body 3 is a hollow circular cylinder structure, both ends of the pipe body 3 are open, and the inner wall of the pipe body 3 is a smooth inner wall. The bottom end of the pipe body 3 is connected with the bottom cover 1, and the connection position between the bottom cover 1 and the pipe body 3 is sealed to ensure the air tightness of the pipe body 3. The pipe body 3 is communicated with the exhaust hole 2 on the circumferential side wall close to the bottom cover 1, and the pipe body 3 is integrally provided with the pipe body conical end 5 at the inlet, the pipe body conical end 5 and the pipe mouth connecting end 6 form an integral whole, the pipe mouth connecting end 6 is connected with the flat mouth connecting end 7 through thread structure, and the flat mouth connecting end 7 has an integrally arranged flat mouth 8.

[0041] In the above structure, the flat mouth 8 of the flat structure can facilitate the operator to send the airflow into the pipe body 3, and the threaded connection structure of the flat mouth connecting end 7 and the pipe mouth connecting end 6 can facilitate the replacement of the flat mouth 8. The pipe body tapered end 5 can cooperate with the hollow tapered cylinder 21 arranged inside to guide the airflow to the direction of the annular moving plate 19 and stably push the annular moving plate 19 to move in the pipe body 3.

[0042] In the present application, the outer wall of the pipe body 3 can be provided with a holding sleeve 4, which is made of elastic material, facilitating the user to hold and avoiding sliding.

[0043] In the present application, the circumferential outer wall of the annular moving plate 19 is attached to the inner wall of the pipe body 3 and can slide along the inner wall of the pipe body 3. The hollow tapered cylinder 21 is integrally arranged at the position of the inner edge of the annular moving plate 19, which cooperates with the pipe body tapered end 5 to guide the airflow entering through the flat mouth 8 to the position of the annular moving plate 19 and act on the annular moving plate 19 in a nearly average manner.

[0044] In the present application, the annular moving plate 19 is processed with a plurality of ring plate grooves 20 at the end face facing the pipe body tapered end 5, that is, the same end face as the extension direction of the hollow tapered cylinder 21. The ring plate grooves 20 are uniformly distributed around the central axis of the annular moving plate 19. The longitudinal section of the ring plate groove 20 is arc-shaped structure. The ring plate groove 20 cooperates with the hollow tapered cylinder 21 to realize the airflow acting on the annular moving plate 19 and increase the contact area between the airflow and the annular moving plate 19, thereby better pushing the annular moving plate 19 to move in the pipe body 3.

[0045] In the present application, the annular moving plate 19 is connected with a plurality of guide sleeves 12 at the end face away from the hollow tapered cylinder 21, and the guide sleeves 12 are uniformly distributed around the central axis of the annular moving plate 19. The guide sleeve 12 is slidably provided with a guide slide rod 9, and the guide slide rod 9 is installed on the bottom cover 1. A return spring 15 is arranged between the top end of the guide slide rod 9 extending into the guide sleeve 12 and the end face of the corresponding annular moving plate 19, and the two ends of the return spring 15 are connected with the guide slide rod 9 and the annular moving plate 19, respectively.

[0046] The top end of the guide slide rod 9 and the end face position of the annular moving plate 19 located in the guide sleeve 12 are fixed with a spring seat 14, and the spring seat 14 is sleeved with the two ends of the return spring 15. The above structure can provide a return force for the guide sleeve 12 and the guide slide rod 9, and provide support for the stable movement of the annular moving plate 19 and provide a force for the return movement of the annular moving plate 19 when the annular moving plate 19 and the pipe body 3 move relatively.

[0047] In the present application, the guide slide rod 9 can be processed with several linear grooves in the circumferential direction, the bottom end of the linear groove penetrates the bottom end of the guide slide rod 9 (that is, the connecting end surface of the guide slide rod 9 and the bottom cover 1), and there is enough distance between the top end of the linear groove and the top end of the guide slide rod 9 (that is, the end of the guide sleeve 12 inserted into the guide slide rod 9). The above structure is convenient to realize the carbon film resistor 10, and is convenient to form a limiting structure at the top end of the guide slide rod 9 to ensure that the annular moving plate 19 is reset to the maximum position without disengaging the guide sleeve 12 from the guide slide rod 9.

[0048] In the present application, the guide sleeve 12 at the inlet end matched with the guide slide rod 9 is connected with a conductive limiting end 11 through fasteners such as screws or rivets, the conductive limiting end 11 is arranged corresponding to the linear groove and can be limited and matched with the linear groove near the top end position of the guide slide rod 9. The conductive limiting end 11 is a metal block and can be connected with the controller through a wire. The conductive limiting end 11 can be slidably matched with the carbon film resistor 10 in the linear groove, and through the sliding between the two, an electric circuit with resistance change is formed in the controller. The controller outputs different voltage signals through the resistance change signal, and the voltage signal interval is between 0V and 5V. The above voltage signal can be calibrated according to the moving distance of the annular moving plate 19 relative to the pipe body 3, and then the moving distance of the annular moving plate 19 is determined through the calibrated voltage signal.

[0049] In the present application, the annular moving plate 19 is provided with a conical cylinder chassis 22 at the middle position, the conical cylinder chassis 22 is uniformly distributed in the circumferential direction and connected with one end of the arc-shaped sheet 17, the arc-shaped sheet 17 is an elastic sheet body, and the arc-shaped sheet 17 is provided with an end surface parallel to the cutting surface of the inner wall of the pipe body 3 at the position corresponding to the inner wall of the pipe body 3. A pair of arc-shaped sheet contacts 18 are arranged at the position of the end surface, and each arc-shaped sheet contact 18 is connected with the controller through a wire. When the two arc-shaped sheet contacts 18 are conductive, the arc-shaped sheet contact 18 can form a conductive loop in the controller. When the loop is conductive, the controller can determine the movement stroke of the annular moving plate 19 through the conduction signal.

[0050] In the present application, the pipe body 3 is provided with a conductive sleeve 13 at the position corresponding to the arc-shaped sheet contact 18, and the conductive sleeve 13 is a metal cylinder. The conductive sleeve 13 can be arranged as a continuous cylinder structure when the arc-shaped sheet 17 is selectively arranged as a pair of arc-shaped sheet contacts 18. When the arc-shaped sheet 17 is arranged with a pair of arc-shaped sheet contacts 18, the conductive sleeve 13 is discontinuous, and only a plate body with an arc-shaped structure is arranged at the position corresponding to the arc-shaped sheet contact 18 to form an electric loop with the corresponding arc-shaped sheet contact 18.

[0051] In the present application, in order to increase the strength of the arc-shaped sheet 17 itself and ensure elasticity, an arc-shaped sheet groove 23 is processed on the end face of the arc-shaped sheet 17 away from the inner wall of the tube body 3.

[0052] In use, the operator holds the flat mouth 8 with the mouth, and sends the airflow into the space formed by the tube body tapered end 5, the tube body 3 and the bottom cover 1 through the flat mouth 8 via the flat mouth connecting end 7 and the tube mouth connecting end 6.

[0053] When the airflow enters between the tube body tapered end 5 and the hollow tapered cylinder 21, it will stably and uniformly contact the end face of the annular moving plate 19 under the guidance of the hollow tapered cylinder 21, and due to the existence of the annular plate groove 20, the contact area between the airflow and the annular moving plate 19 is increased.

[0054] The airflow is guided by the above structure, which pushes the annular moving plate 19 to stably slide relative to the tube body 3. Although part of the gas enters the other end space formed by the annular moving plate 19 and the tube body 3 through the tiny gap between the two, it still does not affect the movement of the annular moving plate 19 under the push of the airflow. Therefore, the tiny airflow passing through the connection position between the annular moving plate 19 and the tube body 3 can be ignored.

[0055] The structure that provides a reaction force for the annular moving plate 19 during the relative movement between the annular moving plate 19 and the tube body 3 includes two: one is the deformation of the arc-shaped sheet 17 itself. During the relative movement between the annular moving plate 19 and the bottom cover 1 (tube body 3), the arc-shaped sheet 17 will be bent and deformed due to external force, and in the process of bending and deforming, the arc-shaped sheet contact 18 will be driven to approach the corresponding conductive sleeve 13 of the tube body 3, and when reaching the set deformation, the arc-shaped sheet contact 18 will contact the conductive sleeve 13 to realize the conduction of the loop. At this time, the controller can receive the above conduction signal and determine the relative movement distance of the annular moving plate 19 and the tube body 3, and calculate the volume of the space formed by the annular moving plate 19, the tube body 3 and the tube body tapered end 5.

[0056] The other is the relative movement between the guide slide rod 9 and the guide sleeve 12, which will cause the reset spring 15 to deform correspondingly.

[0057] At the same time, during the relative movement between the guide slide rod 9 and the guide sleeve 12, the carbon film resistor 10 and the conductive limiting end 11 provided on the guide slide rod 9 and the guide sleeve 12 also move relatively, and then realize different resistance signals. These resistance signals will be captured by the controller, and corresponding voltage signals will be generated according to the corresponding resistance signals. Since the relationship between the voltage signal and the movement distance of the annular moving plate 19 has been calibrated in advance, the movement distance of the annular moving plate 19 can be monitored through the above voltage signal.

[0058] In the above process, the structure represented by the arc-shaped sheet 17 and the arc-shaped sheet contact 18 is used to determine the limit position or fixed point position of the annular moving plate 19, so as to cooperate with the structure of the guide slide rod 9 and the guide sleeve 12 to realize the correction of the signal. The plurality of carbon film resistors 10 and the conductive limiting end 11 provided on the guide slide rod 9 and the guide sleeve 12 can also realize the correction of the signal by forming a plurality of resistance changing loops by themselves, the controller takes the average value of the signals on the same guide slide rod 9 and guide sleeve 12, and takes the secondary average value of the average values on different guide slide rods 9 and guide sleeves 12, generates a corresponding voltage signal, and matches the voltage signal with the moving distance of the annular moving plate 19.

[0059] Since the movement of the annular moving plate 19 in the present application is affected by the external airflow, the above structure can realize the monitoring of the user's breathing or the monitoring of the breath training.

[0060] Finally, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A cavity volume sensing device, comprising a tube body (3), wherein an annular sliding plate (19) is disposed inside the tube body (3), characterized in that: The annular moving plate (19) is an annular plate body, and a hollow conical cylinder (21) is integrally provided at the inner edge of the annular moving plate (19). The hollow conical cylinder (21) extends towards the inlet of the tube body (3). A guide sleeve (12) is provided on the end face of the annular moving plate (19) away from the hollow conical cylinder (21). The guide sleeves (12) are evenly distributed around the central axis of the annular moving plate (19). The guide sleeves (12) extend in a direction away from the annular moving plate (19). An internal sliding guide rod (9) is provided, which is fixed to the bottom cover (1). The bottom cover (1) is connected to the tail end of the tube body (3). A return spring (15) is provided between the end face of the guide rod (9) away from the bottom cover (1) and the end face of the annular moving plate (19). Several arc-shaped pieces (17) are provided between the annular moving plate (19) and the tube body (3). The arc-shaped pieces (17) have paired arc-shaped piece contacts (18) on their end faces facing the inner wall of the tube body (3). The tube body (3) is positioned at the corresponding arc-shaped piece contacts (18). A conductive sleeve (13) is provided at the location, and paired arc-shaped contact points (18) are respectively connected to the controller via wires. The controller has indicator lights. The guide slide (9) has several straight grooves distributed on its circumferential sidewall. A carbon film resistor (10) is placed in the straight groove. The guide sleeve (12) has a conductive limiting end (11) at its inlet end that corresponds to the carbon film resistor (10). The conductive limiting end (11) and the carbon film resistor (10) are respectively connected to the controller via wires. The arc-shaped piece (17) has a contact point (18) on its end face away from the arc-shaped contact point (18). The guide slide (9) and the annular moving plate (19) are provided with spring seats (14) at corresponding positions. The spring seats (14) on the guide slide (9) and the annular moving plate (19) are respectively sleeved on both ends of the return spring (15). The annular moving plate (19) is provided with annular plate grooves (20) on the end face facing the inlet end of the tube body (3). The annular plate grooves (20) are distributed circumferentially on the annular moving plate (19).

2. The lumen volume sensing device according to claim 1, characterized in that: The bottom end of the arc-shaped piece (17) is connected to the bottom cover (1) through the arc-shaped piece connecting seat (16), and the top end of the arc-shaped piece (17) is connected to the inner wall of the annular moving plate (19) through the conical base frame (22).

3. The lumen volume sensing device according to claim 2, characterized in that: The tube body (3) has a conical end (5) that mates with the hollow conical cylinder (21). The concave end of the tube body (5) is integrally formed with the tube opening connection end (6). The tube opening connection end (6) is connected to a flat nozzle connection end (7). A flat nozzle (8) is integrally formed on the flat nozzle connection end (7). The tube body (3) has an exhaust hole (2) connected to the side near the bottom cover (1).

4. The lumen volume sensing device according to claim 1, characterized in that: The tube body (3) is provided with a grip sleeve (4) on its circumferential outer wall, and the grip sleeve (4) has an annular groove for the user to grip.

5. The application of a lumen volume sensing device according to any one of claims 1 to 4 in breath training.

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