Device for measuring volume change of abdominal cavity in reverse abdominal respiration based on pool method

Abstract

The invention relates to a device for measuring the volume change of an abdominal cavity in reverse abdominal respiration based on a pool method, which comprises a measuring pool and a water replenishing and draining measuring device, an observation window is arranged on the measuring pool, and a height-adjustable seat is arranged in the measuring pool; the water replenishing and draining measuring device is used for finely regulating and measuring the water quantity in the water tank; the water replenishing and draining measuring device comprises a water level control plate, a measuring column, a reservoir, a water replenishing pipe and a water outlet pipe; a water replenishing hole, a measuring hole, a water outlet, an upper water level detection hole and a lower water level detection hole are formed in the water level control plate; a water replenishing valve is arranged on the water replenishing hole; the water replenishing hole is communicated with a water replenishing pipe, and the other end of the water replenishing pipe is placed in the reservoir; a water replenishing pump is arranged on the water replenishing pipe; a measuring valve is arranged on the measuring hole; the measuring hole is connected with a measuring column, and the other end of the measuring column is provided with a measuring sucking pump; a water outlet valve is arranged on the water outlet; the other end of the water outlet pipe is positioned above the reservoir; a water outlet pump is arranged on the water outlet pipe; and high-precision measurement of the volume change of the abdominal cavity is realized.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a device for measuring changes in abdominal cavity volume during reverse abdominal breathing based on the water pool method. Background Technology

[0002] Reverse abdominal breathing alters abdominal cavity volume through the coordinated movement of the abdominal and diaphragmatic muscles. Specifically, during inhalation, the abdominal muscles contract and the diaphragm rises, decreasing the abdominal cavity volume; during exhalation, the abdominal muscles relax and the diaphragm descends, increasing the abdominal cavity volume. This reverse abdominal breathing pattern directly affects the position of internal organs. While it can increase lung capacity and improve gastrointestinal motility, there are currently no objective indicators to assess its effectiveness.

[0003] Precisely quantifying the changes in abdominal volume during reverse abdominal breathing can provide an objective assessment tool for optimizing breathing training programs, physical assessments, exercise training, and rehabilitation medicine, and provide objective indicators for evaluating the effectiveness of breathing training and visceral massage. Currently, there is no measurement method that can precisely quantify the dynamic changes in abdominal volume during reverse abdominal breathing.

[0004] The present invention aims to design a measuring device that uses an improved water pool method to measure the abdominal cavity volume during reverse abdominal breathing, and improves many details to achieve accurate quantitative measurement. Summary of the Invention

[0005] This invention designs a device for measuring changes in abdominal cavity volume during reverse abdominal breathing based on a water tank method, which can adjust the water level to monitor changes in abdominal cavity volume during the reverse abdominal breathing cycle and reduce operational complexity and measurement error.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An apparatus for measuring abdominal cavity volume changes during reverse abdominal breathing based on the water tank method is disclosed. The apparatus includes a measuring water tank, a water replenishment / discharge measuring device, and a height adjustment and positioning device for the water replenishment / discharge measuring device. The measuring water tank is a container large enough to accommodate a person sitting or standing, and has an adjustable-height seat inside. An observation window is located on the front side of the measuring water tank. The height adjustment and positioning device includes a fixed end and a movable end, the movable end of which can move relative to the fixed end. The height adjustment and positioning device, in conjunction with the adjustable-height seat, is used to adjust and fix the relative height between the water replenishment / discharge measuring device and the seat before the measurement begins. It allows adjustment of the height difference between the water replenishment / discharge measuring device and the seat according to the subject's body shape before the test, ensuring that the height of the water replenishment / discharge measuring device is the same as the subject's diaphragm height. The water replenishment / discharge measuring device is used to regulate the water level in the measuring water tank, ensuring that the water level in the measuring water tank is the same as the subject's diaphragm height before the measurement. The water replenishment and drainage measurement device includes a water level control plate, a measuring column, a water storage tank, a water replenishment pipe, and a water outlet pipe. The fixed end of the height adjustment and positioning device is installed on the inner wall of the measuring water tank. The water level control plate of the water replenishment and drainage measurement device is connected to the movable end of the height adjustment and positioning device. The water level control plate is provided with a water replenishment hole, a measuring hole, a water outlet, an upper water level detection hole, and a lower water level detection hole. The centers of the water replenishment hole, the measuring hole, and the water outlet are located on the same horizontal line, and a horizontal line mark is provided on the line connecting their centers. The upper water level detection hole is located above the horizontal line mark, and the lower water level detection hole is located below the horizontal line mark. A high water level probe is provided in the upper water level detection hole, and a low water level probe is provided in the lower water level detection hole. The water storage tank is located outside the measuring water tank. A water supply valve is installed on the water supply hole; one end of the water supply hole is connected to the water supply pipe, and the other end of the water supply pipe is placed in the water storage tank; a water supply pump is also installed on the water supply pipe. A measuring valve is provided on the measuring hole; the measuring hole is connected to one end of the measuring column, and a measuring air pump is provided at the other end of the measuring column. The outlet is equipped with an outlet valve; the outlet is connected to one end of the outlet pipe, and the other end of the outlet pipe is located above the water storage tank; the outlet pipe is also equipped with an outlet pump.

[0007] Furthermore, the seat includes a seat base, a seat height adjustment device, and a seat plate. The seat base is formed by filling a measuring water tank or by hollowing out a portion of the measuring water tank. In addition to facilitating seated measurement, the seat base also reduces water consumption in the measuring water tank. The seat plate is located above the seat base. The seat height adjustment device is disposed between the seat plate and the seat base and is used to adjust the height of the seat plate. The seat height adjustment device includes a fixed end and a movable end. The fixed end of the seat height adjustment device is fixedly connected to the seat base, and the movable end of the seat height adjustment device is fixedly connected to the seat plate.

[0008] Furthermore, the height adjustment and positioning device is a slide rail; the seat height adjustment device is a screw lift, which adjusts the height of the seat plate or the height of the water replenishment and drainage measuring device to make the height of the water replenishment and drainage measuring device the same as the height of the subject's diaphragm. Furthermore, a buffer chamber is also provided between the measuring column and the measuring air pump.

[0009] Furthermore, the height difference between the upper water level detection hole and the lower water level detection hole and the horizontal line marker is the same.

[0010] The high-water-level probe and the low-water-level probe are both water-level sensors, which can be capacitive liquid level sensors or float-type liquid level sensors.

[0011] Furthermore, the device for determining the change in abdominal cavity volume during reverse abdominal breathing based on the water pool method also includes a coarse adjustment inlet pipe and a coarse adjustment outlet pipe. One end of the coarse adjustment inlet pipe is connected to the measuring water pool, and the other end is connected to the storage tank. The coarse adjustment inlet pipe is equipped with a coarse adjustment inlet pump, a one-way valve, and a coarse adjustment inlet valve. One end of the coarse adjustment outlet pipe is connected to the measuring water pool, and the other end is connected to the storage tank. The coarse adjustment outlet pipe is equipped with a coarse adjustment outlet pump, a one-way valve, and a coarse adjustment outlet valve.

[0012] Furthermore, the device for measuring abdominal cavity volume changes during reverse abdominal breathing based on the water pool method also includes a controller, an operation panel, and signal indicator lights. The controller is a control microprocessor. After processing and calculating the presence and frequency of signals from the high-water-level probe and the low-water-level probe, the controller outputs a control signal. The controller can be, for example, a programmable logic controller (PLC) or a microcontroller. The water supply valve and the water outlet valve are solenoid valves. The water supply valve, the water outlet valve, the water supply pump, the water outlet pump, the high-water-level probe, and the low-water-level probe are all electrically connected to the controller. The control panel is equipped with a water level adjustment button, a measurement start button, and a power switch. These buttons are electrically connected to the controller, and the device is connected to an external power source. The power switch controls the device's power supply. The water level adjustment button controls the opening and closing of the water supply valve, water outlet valve, water supply pump, and water outlet pump, thereby controlling the water supply and drainage measurement device to supply or drain water. The measurement start button controls the opening and closing of the measurement air pump and the measurement valve, thus enabling the detection process. The signal indicator lights include an indicator light for indicating high water level, an indicator light for indicating moderate water level, and an indicator light for indicating low water level; all signal indicator lights are electrically connected to the controller.

[0013] Furthermore, the coarse adjustment inlet valve and coarse adjustment outlet valve can be manually controlled valves or solenoid valves; the coarse adjustment inlet pump, coarse adjustment outlet pump, coarse adjustment inlet valve, and coarse adjustment outlet valve can be manually controlled to open / close individually, or they can be electrically connected to the controller and controlled to open / close by the controller sending a control signal.

[0014] The working principle and measurement operation process of the device for determining the change in abdominal cavity volume during reverse abdominal breathing based on the water pool method are as follows: S1: The subject to be measured enters the measurement pool and sits upright; S2: The measurement operator adjusts the water volume in the measurement pool by coarse adjustment inlet pipe, coarse adjustment inlet pump, coarse adjustment inlet valve, coarse adjustment outlet pipe, coarse adjustment outlet pump, and coarse adjustment outlet valve, so that the water level in the measurement pool is approximately the same as the height of the subject's diaphragm. S3: Adjust the height of the seat or the height of the water replenishment and drainage measurement device so that the horizontal line mark on the water replenishment and drainage measurement device is level with the height of the subject's diaphragm (i.e., the chest-abdomen junction). S4: Turn on the device power, press the water level adjustment button on the control panel to start the water replenishment and drainage measurement device to finely adjust the water level in the measurement tank until the water level is level with the horizontal line mark on the device. During this process, if both the high-level and low-level probes detect a stable water level signal, it means the water level is higher than the horizontal line mark. The controller will illuminate the high-level indicator light and open the outlet pump and outlet valve to pump water out through the outlet pipe, reducing the water volume in the measurement tank. If neither the high-level nor low-level probes detect a water level signal, it means the water level is lower than the horizontal line mark. The controller will illuminate the low-level indicator light and open the water replenishment pump and water replenishment valve to pump water in through the water replenishment pipe, increasing the water volume in the measurement tank. When the high water level probe cannot detect a water level signal, but the low water level probe can detect a stable water level signal, the controller processes and calculates the presence and frequency of signals from the high water level probe and the low water level probe, and then controls the indicator light representing the appropriate water level to light up, indicating that the water level has reached the required height. At this time, the measurement operator instructs the subject to start inhaling using reverse abdominal breathing. The operator observes the changes in abdominal volume of the subject during inhalation using reverse abdominal breathing through the observation window (during this process, as the subject's abdominal volume decreases, the water level in the measurement pool drops, and the low-water-level probe cannot detect the water level signal; the controller then controls the water replenishment and drainage measurement device to replenish water into the measurement pool, ensuring that the water level in the measurement pool remains level with the horizontal line marking); when the operator observes that the subject's abdominal volume is at its minimum at the end of inhalation, they press the measurement start button on the control panel, and the device begins measurement. At this time, the controller closes the water replenishment valve and the water outlet valve, and opens the measurement valve and the measurement suction pump (i.e., pressing the measurement start button simultaneously sends a control signal to close the water replenishment pump, water replenishment valve, water outlet pump, and water outlet valve, and opens the measurement valve and the measurement suction pump). S5: As the subject exhales using reverse abdominal breathing, the volume of the subject's abdomen gradually increases, and the water level in the measurement pool rises. Water exceeding the height of the measurement orifice is drawn into the measurement column. The controller controls a delay to continue this inhalation process. The delay time is slightly longer than the exhalation time period, ranging from 2 to 3 seconds. When the delay ends, the measurement valve is closed, and then the measurement suction pump is turned off. Finally, the water level in the measurement column is observed, and the volume of water drawn into the measurement column is calculated, which is the change in the subject's abdominal volume during reverse abdominal breathing. S6: Take multiple measurements (at least three) and average the results.

[0015] Technical effects of the present invention: (1) The device is equipped with an observation window, which can observe the breathing movements of the subject and distinguish between the inhalation and exhalation stages. It is convenient to measure the changes in abdominal volume when the subject is reversing abdominal breathing, and provides a quantitative comparison benchmark for different training stages.

[0016] (2) The device can adjust the position of the water replenishment and drainage measurement device through the height adjustment positioning device, and the height of the seat can also be adjusted, making it easier to adjust the height difference between the water replenishment and drainage measurement device and the seat. It can be adapted to subjects of different body types and is suitable for evaluating the effect of breathing training in hospital, gym and home settings.

[0017] (3) Currently, there is no dedicated device for measuring abdominal volume changes during reverse abdominal breathing. This device breaks through the static limitations of the traditional water tank method and achieves dynamic, continuous, and high-precision measurement of abdominal volume changes during reverse abdominal breathing for the first time. It provides a standardized tool for breathing pattern research, has both scientific verification value and practical application potential, and promotes the transformation of reverse abdominal breathing training from experience-guided to data-driven.

[0018] (4) This device provides objective assessment methods for fields such as physical assessment, sports training, and rehabilitation medicine. It provides objective indicators for assessing the effects of breathing training and visceral massage, and provides standardized tools for assessing the efficacy of respiratory rehabilitation (such as the improvement of diaphragmatic function in patients with chronic diseases) and sports medicine research, filling the gap in dynamic quantitative technology.

[0019] (5) The device achieves accurate water level detection and automatic water volume control through the water replenishment and drainage measurement device and its high water level probe and low water level probe. The measurement column accurately quantifies the water level change in the pool when the subject breathes in reverse abdominal breathing, thereby improving detection efficiency and accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the device used to measure the change in abdominal cavity volume during reverse abdominal breathing, as described in an embodiment of the present invention.

[0021] Figure 2 This is a partially enlarged structural diagram of the water replenishment and drainage measurement device in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the water level control plate in an embodiment of the present invention.

[0023] Figure 4 This is a side view of the measuring pool in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the detection circuit of the device in an embodiment of the present invention.

[0025] Figure 6This is a schematic diagram of the control circuit of the device in an embodiment of the present invention.

[0026] Explanation of the reference numerals in the diagram: 1-Measuring pool, 2-Observation window, 3-Water supply and drainage measuring device, 4-Height adjustment and positioning device, 5-Seat, 501-Seat base, 502-Seat height adjustment device, 503-Seat seat plate; 301-Water inlet hole, 302-Water inlet valve, 303-Measuring hole, 304-Measuring valve, 305-Outlet, 306-Outlet valve, 307-Measuring column, 308-Buffer chamber, 309-Measuring air pump, 310-Water inlet pump, 311-Outlet pump, 312-Water level control plate, 313-Water storage tank, 314-Water inlet pipe, 315-Outlet pipe; 316 - Coarse adjustment inlet pipe, 317 - Coarse adjustment outlet pipe, 318 - Control panel, 319 - Signal indicator light, 320 - Horizontal line marker, 321 - Upper water level detection hole, 322 - Lower water level detection hole, 323 - Coarse adjustment inlet pump, 324 - Coarse adjustment outlet pump, 325 - Coarse adjustment inlet valve, 326 - Coarse adjustment outlet valve, 327 - Check valve. Detailed Implementation

[0027] To better understand the above-described objects, features, and advantages of the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a thorough understanding of the invention; however, the invention may be practiced in other ways different from those described herein, and therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] like Figures 1-4The device shown is for measuring abdominal cavity volume changes during reverse abdominal breathing based on the water tank method. It includes a measuring water tank 1, a water replenishment and drainage measuring device 3, and a height adjustment and positioning device 4. The measuring water tank 1 is a container large enough to accommodate a person sitting or standing. A seat 5 is provided inside the measuring water tank 1. In this embodiment, the height of the seat 5 is adjustable. The seat 5 includes a seat base 501, a seat height adjustment device 502, and a seat board 503. The seat base 501 is formed by filling the measuring water tank 1 or by hollowing out a portion of the measuring water tank 1. The seat base 501 facilitates seated measurement and reduces water consumption in the measuring water tank 1. The seat height adjustment device 502 is located between the seat board 503 and the seat base 501. The seat height adjustment device 502 can adjust the height of the seat board 503 to ensure that the height of the water replenishment and drainage measuring device 3 is the same as the height of the subject's diaphragm. In this embodiment, the seat height adjustment device 502 can be a commonly used screw lift for adjusting seat height, which has a self-locking mechanism. Features include: it will not shift after being moved to the required height; the fixed end of the screw lift is fixedly connected to the seat base 501, and the movable end of the screw lift is fixedly connected to the seat plate 503; an observation window 2 is provided on the front side of the measuring pool 1, through which staff can observe the water level in the measuring pool 1 and the subject's breathing; the height adjustment positioning device 4 includes a fixed end and a movable end, the movable end being able to move relative to the fixed end, and the height adjustment positioning device 4 is used to adjust and fix the position of the water replenishment and drainage measuring device 3; through the height adjustment positioning device 4 in conjunction with the height-adjustable seat 5, it is used to adjust and fix the relative height between the water replenishment and drainage measuring device 3 and the seat 5 before the measurement begins, adjusting the height of the height adjustment positioning device 4 or the seat plate 503 of the seat 5, and adjusting the height difference between the water replenishment and drainage measuring device 3 and the seat 5 according to the subject's body shape before the test, so that the height of the water replenishment and drainage measuring device 3 is the same as the height of the subject's diaphragm; the water replenishment and drainage measuring device 3 is used to regulate the water volume in the measuring pool 1.

[0029] The height of the measuring pool 1 is the chest height when the subject is sitting or standing, and the minimum height is not lower than the height of the subject's diaphragm when sitting or standing. After the subject enters the measuring pool 1, the water level in the measuring pool 1 is set at the height of the subject's diaphragm by the water replenishment and drainage measuring device 3.

[0030] The water replenishment and drainage measuring device 3 includes a water level control plate 312, a measuring column 307, a water storage tank 313, a water replenishment pipe 314, and a water outlet pipe 315. The fixed end of the height adjustment and positioning device 4 is installed on the inner wall of the measuring water tank 1. The water level control plate 312 is connected to the movable end of the height adjustment and positioning device 4. The height adjustment and positioning device 4 can adjust the height of the water replenishment and drainage measuring device 3 before the test so that the height of the water replenishment and drainage measuring device 3 is the same as the height of the subject's diaphragm. In this embodiment, the height adjustment and positioning device 4 is a slide rail. The water replenishment and drainage measuring device 3 can move up and down along the slide rail, and the slide rail can be locked by bolts or other means so that the movable end can be slid to a designated position and then fixed. The water level control plate 312 is provided with a water inlet hole 301, a measuring hole 303, a water outlet 305, an upper water level detection hole 321, and a lower water level detection hole 322. The centers of the water inlet hole 301, the measuring hole 303, and the water outlet 305 are located on the same horizontal line, and a horizontal line marker 320 is provided on the line connecting their centers. To stabilize the water level, multiple water inlet holes 301 and water outlets 305 can be provided. The upper water level detection hole 321 is located above the horizontal line marker 320, and the lower water level detection hole 322 is located below the horizontal line marker 320. The height difference between the upper water level detection hole 321 and the lower water level detection hole 322 and the horizontal line marker 320 is the same and does not exceed 1 cm. In this embodiment, the height difference between the upper water level detection hole 321 and the lower water level detection hole 322 and the horizontal line marker 320 is set to 0.5 cm. A high-water-level probe is installed in the upper water-level detection hole 321, and a low-water-level probe is installed in the lower water-level detection hole 322. In this embodiment, both the high-water-level probe and the low-water-level probe are water-level sensors, which can be capacitive or float-type liquid level sensors. The water storage tank 313 is located outside the measuring water tank 1.

[0031] The water inlet 301 is equipped with a water inlet valve 302; at the same time, the water inlet 301 is connected to one end of the water inlet pipe 314, and the other end of the water inlet pipe 314 is placed in the water storage tank 313; the water inlet pipe 314 is also equipped with a water inlet pump 310, which can pump water from the water storage tank 313 into the measuring water tank 1 through the water inlet pump 310 and the water inlet pipe 314.

[0032] A measuring valve 304 is provided on the measuring hole 303; at the same time, the measuring hole 303 is connected to one end of the measuring column 307, and a measuring vacuum pump 309 is provided at the other end of the measuring column 307.

[0033] A buffer chamber 308 is also provided between the measuring column 307 and the measuring air pump 309. The buffer chamber 308 is used to increase the volume of the measuring column 307 and at the same time prevent the water pumped into the measuring column 307 from overflowing.

[0034] A water outlet valve 306 is provided on the water outlet 305; at the same time, the water outlet 305 is connected to one end of the water outlet pipe 315, and the other end of the water outlet pipe 315 is located above the water storage tank 313; a water outlet pump 311 is also provided on the water outlet pipe 315, and the water in the measuring water tank 1 can be pumped into the water storage tank 313 through the water outlet pump 311 and the water outlet pipe 315.

[0035] In this embodiment, the device for determining the change in abdominal cavity volume during reverse abdominal breathing based on the water tank method is further equipped with a coarse adjustment inlet pipe 316 and a coarse adjustment outlet pipe 317. One end of the coarse adjustment inlet pipe 316 is connected to the measuring water tank 1, and the other end is connected to the storage tank 313. A coarse adjustment inlet pump 323, a one-way valve 327, and a coarse adjustment inlet valve 325 are installed on the coarse adjustment inlet pipe 316. One end of the coarse adjustment outlet pipe 317 is connected to the measuring water tank 1, and the other end is connected to the storage tank 313. A coarse adjustment outlet pump 324, a one-way valve 327, and a coarse adjustment outlet valve 326 are installed on the coarse adjustment inlet pipe 316 and the coarse adjustment outlet pipe 317. The one-way valves 327 on the coarse adjustment inlet pipe 316 and the coarse adjustment outlet pipe 317 are installed according to the required water flow direction, and the water flow directions of the two one-way valves 327 are opposite.

[0036] In this embodiment, the device for measuring the change in abdominal cavity volume during reverse abdominal breathing based on the water pool method is further equipped with a controller, an operation panel 318, and a signal indicator 319. The water supply valve 302 and the water outlet valve 306 are solenoid valves. The water supply valve 302, the water outlet valve 306, the water supply pump 310, the water outlet pump 311, the high water level probe, and the low water level probe are all electrically connected to the controller. The controller is a control microprocessor, which can be, for example, a programmable logic controller (PLC) or a microcontroller. The control panel 318 is equipped with a water level adjustment button, a measurement start button, and a power switch. These buttons are electrically connected to the controller, and the device is connected to an external power source. The power switch controls the device's power supply. The water level adjustment button controls the opening / closing of the water supply valve 302, the water outlet valve 306, the water supply pump 310, and the water outlet pump 311, thereby controlling the water supply and drainage measuring device 3 to supply or drain water. The measurement start button controls the opening / closing of the measuring air pump 309 and the measuring valve 304, thereby performing the detection work. The signal indicator lights 319 include an indicator light for indicating high water level, an indicator light for indicating moderate water level, and an indicator light for indicating low water level; all signal indicator lights 319 are electrically connected to the controller.

[0037] The coarse adjustment inlet valve 325 and coarse adjustment outlet valve 326 can be manually controlled valves or solenoid valves. The coarse adjustment inlet pump 323, coarse adjustment outlet pump 324, coarse adjustment inlet valve 325, and coarse adjustment outlet valve 326 can be manually controlled to open / close individually, or they can be electrically connected to the controller and controlled to open / close by the controller sending a control signal. In this embodiment, the coarse adjustment inlet pump 323, coarse adjustment outlet pump 324, coarse adjustment inlet valve 325, and coarse adjustment outlet valve 326 are all electrically connected to the controller.

[0038] like Figure 5 As shown, the control principle of the detection circuit between the operation panel 318 and the water replenishment / drainage measuring device 3 of the present invention is as follows: The detection circuit includes switch K1, start button Q1, a self-locking coil JJ of a relay, a contact switch of the relay (self-locking coil JJ), and a time delay switch KT1. Switch K1 is connected in series with the self-locking coil JJ. A start button Q1 and the contact switch of the relay (self-locking coil JJ) are connected in parallel between the power switch K1 and the self-locking coil JJ. The time delay switch KT1 is connected in series on the branch where the contact switch of the relay (self-locking coil JJ) is located. Switch K1 controls the power supply to / from the detection circuit. Start button Q1 controls the on / off state of the self-locking coil JJ of the relay, controlling the start of the measurement operation. Start button Q1 is an instantaneous switch; it is energized when pressed and de-energized when released. The self-locking coil JJ controls the on / off state of each valve. The contact switch of the self-locking coil controls the opening and closing of the relay (self-locking coil JJ). Time delay switch KT1 controls the on / off state during the delay. Time delay switch KT1 is a normally closed switch; it is initially closed and opens after the delay ends. Before measurement, the water level in the measuring pool 1 is adjusted to a suitable level, and when the measurement operator presses the test start button on the operation panel 318, the corresponding detection circuit in the controller is activated. The self-locking coil JJ of the relay in the detection circuit starts to work, thereby controlling each valve and pump to perform corresponding actions.

[0039] like Figure 6 As shown, the working principle and measurement operation process of the device of the present invention are as follows: S1: The subject enters the measurement pool 1 and sits upright.

[0040] S2: The measurement operator controls the water volume in the measurement pool 1 through the coarse adjustment inlet pipe 316, coarse adjustment inlet pump 323, coarse adjustment inlet valve 325, coarse adjustment outlet pipe 317, coarse adjustment outlet pump 324 and coarse adjustment outlet valve 326, so that the water level is approximately the same as the height of the subject's diaphragm.

[0041] S3: Adjust the height of seat 5 or the height of water replenishment and drainage measuring device 3 so that the horizontal line mark 320 on water replenishment and drainage measuring device 3 is the same as the height of the subject's diaphragm.

[0042] S4: Turn on the device power (i.e., Figure 5 (When switch K1 is turned on), press the water level adjustment button on the operation panel 318 to adjust the water level to the same height as the subject's diaphragm through the water replenishment and drainage measuring device 3. During this process, if the high water level probe and the low water level probe detect a stable water level signal at the same time, it means that the water level is higher than the horizontal line mark 320. The controller controls the high water level indicator light to light up and controls the water pump 311 and the water valve 306 to open, pumping water out through the water pipe 315 to reduce the amount of water in the measuring pool 1. If neither the high water level probe nor the low water level probe detects a water level signal, it means that the water level is lower than the horizontal line mark 320. The controller controls the low water level indicator light to light up and controls the water replenishment pump 310 and the water replenishment valve 302 to open, pumping water in through the water replenishment pipe 314 to increase the amount of water in the measuring pool 1. Once the water level is adjusted to a suitable level, the high-level probe cannot detect a water level signal, while the low-level probe can detect a stable water level signal. Since the water level may fluctuate, the controller will use an intelligent algorithm to process and calculate the presence and frequency of the signals from the high-level and low-level probes (the algorithm processing of the controller is all existing technology and is not an improvement of this invention, so it will not be described in detail here). When the signal frequency of the high-level probe is lower than the preset lower frequency threshold and the signal frequency of the low-level probe is higher than the preset upper frequency threshold, the controller will control the indicator light representing a suitable water level to light up. At this time, the measurement operator will instruct the subject to start inhaling using reverse abdominal breathing. The operator observes the change in abdominal volume of the subject during inhalation using reverse abdominal breathing through observation window 2. (During this process, as the subject's abdominal volume decreases, the water level in measurement pool 1 drops, and the low-water-level probe cannot detect the water level signal. The controller will then control the water replenishment and drainage measurement device 3 to replenish water into measurement pool 1, ensuring that the water level in measurement pool 1 remains level with the horizontal line mark 320.) When the operator observes the subject's abdomen contracting to its minimum (smallest abdominal volume) during inhalation, they press the test start button on the operation panel 318 (i.e., press...). Figure 5 When the start button Q1 is pressed, the device begins measurement. At this time, the controller closes the water supply valve 302 and the outlet valve 306, and opens the measuring valve 304 and the measuring air pump 309. (After pressing the start button Q1, the branch containing the start button Q1 is briefly closed, the contact switch of the relay (self-locking coil JJ) is activated, the branch containing the contact switch is closed, the delay switch KT1 starts working, the timer starts automatically, the self-locking coil JJ of the relay is activated, and each valve and pump performs corresponding actions.) That is, when the measurement start button is pressed, the controller sends a control signal to close the water supply pump 310, the water supply valve 302, the outlet pump 311, and the outlet valve 306, and opens the measuring valve 304 and the measuring air pump 309.

[0043] S5: As the subject exhales using reverse abdominal breathing, the volume of the subject's abdomen gradually increases, and the water level in the measuring pool 1 rises. Water exceeding the height of the measuring hole 303 is drawn into the measuring column 307. The controller is equipped with a delay control circuit to control the delay to continue this inhalation process. The delay time is slightly longer than the exhalation time cycle, about 2 to 3 seconds. In this embodiment, it is set to 2.5 seconds. When the delay ends, the measuring valve 304 is closed, and then the measuring suction pump 309 is closed (that is, after 2.5 seconds, the delay switch KT1 is opened, the branch where the contact switch is located is opened, the self-locking coil JJ of the relay stops working, and the measuring valve 304 and the measuring suction pump 309 are closed). Finally, the water level in the measuring column 307 is observed, and the volume of water drawn into the measuring column 307 is calculated (the corresponding volume measurement scale can be pre-set on the measuring column 307), that is, the change value of the subject's abdominal volume during reverse abdominal breathing is calculated.

[0044] S6: Perform the measurement process from S1 to S5 multiple times (at least three times), take the average value, and obtain the accurate change value of the abdominal volume during the subject's reverse abdominal breathing.

Claims

1. A device for measuring changes in abdominal cavity volume during reverse abdominal breathing based on the water tank method, characterized in that, The device includes a measuring pool (1), a water replenishment and drainage measuring device (3), and a height adjustment and positioning device (4) for the water replenishment and drainage measuring device (3). The measuring pool (1) is a container that can accommodate a person sitting or standing, and has an adjustable seat (5) inside. An observation window (2) is provided on the front side of the measuring pool (1). The height adjustment and positioning device (4) includes a fixed end and a movable end. The movable end can move relative to the fixed end. The height adjustment and positioning device (4) works with the adjustable seat (5) to adjust and fix the relative height between the water replenishment and drainage measuring device (3) and the seat (5) before the measurement begins, so that the height of the water replenishment and drainage measuring device (3) is the same as the height of the subject's diaphragm. The water replenishment and drainage measuring device (3) is used to finely adjust the water level in the measuring pool (1) before the measurement begins, and to finely measure the change in abdominal volume of the subject during reverse abdominal breathing after the measurement begins. The water replenishment and drainage measuring device (3) includes a water level control plate (312), a measuring column (307), a water storage tank (313), a water replenishment pipe (314), and a water outlet pipe (315). The fixed end of the height adjustment and positioning device (4) is installed on the inner wall of the measuring water tank (1). The water level control plate (312) of the water replenishment and drainage measuring device (3) is connected to the movable end of the height adjustment and positioning device (4). The water level control plate (312) is provided with a water replenishment hole (301), a measuring hole (303), a water outlet (305), an upper water level detection hole (321), and a lower water level detection hole. The centers of the water supply hole (301), the measuring hole (303), and the outlet (305) are located on the same horizontal line, and a horizontal line marker (320) is set on the line connecting the centers of the three. The upper water level detection hole (321) is located above the horizontal line marker (320), and the lower water level detection hole (322) is located below the horizontal line marker (320). A high water level probe is set in the upper water level detection hole (321), and a low water level probe is set in the lower water level detection hole (322). The water storage tank (313) is located outside the measuring water tank (1). A water supply valve (302) is provided on the water supply hole (301); one end of the water supply hole (301) is connected to the water supply pipe (314), and the other end of the water supply pipe (314) is placed in the water storage tank (313); a water supply pump (310) is also provided on the water supply pipe (314). A measuring valve (304) is provided on the measuring hole (303); the measuring hole (303) is connected to one end of the measuring column (307), and a measuring vacuum pump (309) is provided at the other end of the measuring column (307). The outlet (305) is equipped with an outlet valve (306); the outlet (305) is connected to one end of the outlet pipe (315), and the other end of the outlet pipe (315) is located above the water storage tank (313); the outlet pipe (315) is also equipped with an outlet pump (311).

2. The device for measuring abdominal cavity volume changes during reverse abdominal breathing based on the water tank method according to claim 1, characterized in that, The seat (5) includes a seat base (501), a seat height adjustment device (502), and a seat plate (503). The seat base (501) is formed by filling the measuring water tank (1) or by hollowing out a part of the measuring water tank (1). In addition to facilitating seated measurement, the seat base (501) can also reduce the water consumption in the measuring water tank (1). The seat plate (503) is located above the seat base (501). The seat height adjustment device (502) is located between the seat plate (503) and the seat base (501) and is used to adjust the height of the seat plate (503). The seat height adjustment device (502) includes a fixed end and a movable end. The fixed end of the seat height adjustment device (502) is fixedly connected to the seat base (501), and the movable end of the seat height adjustment device (502) is fixedly connected to the seat plate (503).

3. The device for determining the change in abdominal cavity volume during reverse abdominal breathing based on the water tank method according to claim 2, characterized in that, The height adjustment and positioning device (4) is a slide rail; the seat height adjustment device (502) is a screw lifter, which adjusts the height of the seat plate (503) or the height of the water replenishment and drainage measuring device (3) so that the height of the water replenishment and drainage measuring device (3) is the same as the height of the subject's diaphragm.

4. The device for measuring abdominal cavity volume changes during reverse abdominal breathing based on the water tank method according to claim 3, characterized in that, A buffer chamber (308) is also provided between the measuring column (307) and the measuring air pump (309).

5. The device for measuring abdominal cavity volume changes during reverse abdominal breathing based on the water tank method according to claim 4, characterized in that, The height difference between the upper water level detection hole (321) and the lower water level detection hole (322) and the horizontal line marker (320) is the same.

6. The device for determining the change in abdominal cavity volume during reverse abdominal breathing based on the water tank method according to claim 5, characterized in that, It also includes a coarse adjustment inlet pipe (316) and a coarse adjustment outlet pipe (317). One end of the coarse adjustment inlet pipe (316) is connected to the measuring water tank (1), and the other end is connected to the storage tank (313). A coarse adjustment inlet pump (323), a check valve (327), and a coarse adjustment inlet valve (325) are installed on the coarse adjustment inlet pipe (316). One end of the coarse adjustment outlet pipe (317) is connected to the measuring water tank (1), and the other end is connected to the storage tank (313). A coarse adjustment outlet pump (324), a check valve (327), and a coarse adjustment outlet valve (326) are installed on the coarse adjustment outlet pipe (317).

7. The device for determining the change in abdominal cavity volume during reverse abdominal breathing based on the water tank method according to claim 6, characterized in that, It also includes a controller, an operation panel (318) and a signal indicator (319). The water supply valve (302) and the water outlet valve (306) are solenoid valves. The water supply valve (302), the water outlet valve (306), the water supply pump (310), the water outlet pump (311), the high water level probe, and the low water level probe are all electrically connected to the controller. The control panel (318) is equipped with a water level adjustment button, a measurement start button, and a power switch. The water level adjustment button, the measurement start button, and the power switch are all electrically connected to the controller. The device is connected to an external power source. The power switch is used to control the device to be powered on. The water level adjustment button is used to control the opening / closing of the water supply valve (302), the water outlet valve (306), the water supply pump (310), and the water outlet pump (311), thereby controlling the water supply and drainage measurement device (3) to supply or drain water. The measurement start button is used to control the opening / closing of the measurement air pump (309) and the measurement valve (304), thereby performing the detection work. The signal indicator (319) includes an indicator for indicating high water level, an indicator for indicating moderate water level, and an indicator for indicating low water level; all signal indicator (319) are electrically connected to the controller.

8. The device for determining the change in abdominal cavity volume during reverse abdominal breathing based on the water tank method according to claim 7, characterized in that, The specific measurement procedure is as follows: S1: The subject to be measured enters the measurement pool (1) and sits upright; S2: The measurement operator adjusts the water volume in the measurement pool by coarse adjustment inlet pipe (316), coarse adjustment inlet pump (323), coarse adjustment inlet valve (325), coarse adjustment outlet pipe (317), coarse adjustment outlet pump (324), and coarse adjustment outlet valve (326) so that the water level in the measurement pool (1) is approximately the same as the height of the subject's diaphragm. S3: Adjust the height of the seat (5) or the height of the water replenishment and drainage measuring device (3) so that the horizontal line mark (320) on the water replenishment and drainage measuring device (3) is level with the height of the subject's diaphragm; S4: Turn on the device power, press the water level adjustment button on the operation panel (318) to start the water replenishment and drainage measurement device (3) to finely adjust the water level in the measurement pool (1) so that the water level is level with the horizontal line mark (320) on the water replenishment and drainage measurement device (3); during this process, if the high water level probe and the low water level probe detect a stable water level signal at the same time, it means that the water level is higher than the horizontal line mark (320). The controller controls the high water level indicator light to light up and controls the outlet pump (311) and outlet valve (306) to open, pumping water out through the outlet pipe (315) to reduce the amount of water in the measurement pool (1); if neither the high water level probe nor the low water level probe detects a water level signal, it means that the water level is lower than the horizontal line mark (320). The controller controls the low water level indicator light to light up and controls the water replenishment pump (310) and water replenishment valve (302) to open, pumping water in through the water replenishment pipe (314) to increase the amount of water in the measurement pool (1); When the high water level probe cannot detect a water level signal, but the low water level probe can detect a stable water level signal, the controller processes and calculates the presence and frequency of signals from the high water level probe and the low water level probe, and then controls the indicator light representing the appropriate water level to light up, indicating that the water level has reached the required height. At this time, the measurement operator instructs the subject to start inhaling using reverse abdominal breathing. The measurement operator observes the change in abdominal volume of the subject when inhaling using reverse abdominal breathing through the observation window (2). During this process, as the abdominal volume of the subject decreases, the water level in the measurement pool (1) will drop. The low water level probe cannot detect the water level signal. The controller will control the water replenishment and drainage measurement device (3) to replenish water into the measurement pool (1) so that the water level in the measurement pool (1) is always level with the horizontal line mark (320). When the measurement operator observes that the abdominal volume of the subject is at its smallest at the end of inhalation, the measurement operator presses the measurement start button on the operation panel (318), and the device starts to perform the measurement work. At this time, the controller controls the water replenishment valve (302) and the water outlet valve (306) to close, and controls the measurement valve (304) and the measurement air pump (309) to open. That is, when the measurement start button is pressed, the controller sends a control signal to close the water replenishment pump (310), the water replenishment valve (302), the water outlet pump (311), and the water outlet valve (306), and opens the measurement valve (304) and the measurement air pump (309). S5: As the subject exhales in reverse abdominal breathing, the volume of the subject's abdomen gradually increases, and the water level in the measuring pool (1) rises. Water exceeding the height of the measuring hole (303) is drawn into the measuring column (307). The controller controls the delay to continue this inhalation process. The delay time is slightly longer than the exhalation time cycle, which is 2 to 3 seconds. When the delay ends, the measuring valve (304) is closed, and then the measuring suction pump (309) is turned off. Finally, the water level in the measuring column (307) is observed, and the volume of water drawn into the measuring column (307) is calculated, that is, the change value of the subject's abdominal volume during reverse abdominal breathing is calculated. S6: Take multiple measurements and average the results.

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