Convenient-to-replace chest breathing effort detection device for sleep detection

Abstract

The invention belongs to the technical field of wearable sensor design, and particularly relates to a convenient-to-replace chest breathing effort detection device for sleep detection, which comprises a detection probe connected with a breathing machine through a wire and a fixing band for fixing the detection probe, the detection probe is composed of a flexible substrate and an embedded distributed strain sensor array, the detection probe is used for detecting surface strain caused by chest breathing, the detection probe is detachably fixed to the back face of the fixing band, and the fixing band is detachably fixed to the body of a patient. The detection probe is fixed on the fixing band in a magnetic attraction mode. Due to the design, the detection probe is extremely convenient to replace, when the detection probe needs to be replaced, the detection probe only needs to be taken out of the magnetic suction sleeve, and then a new detection probe is placed, so that the maintenance efficiency of the detection device is greatly improved, and the detection work can be carried out timely and smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of wearable sensor design, and in particular to a chest respiratory effort detection device for sleep detection that is convenient for replacement. Background Art

[0002] In the field of sleep monitoring, accurately detecting chest respiratory effort is crucial for evaluating a patient's sleep breathing condition, especially for patients suffering from sleep breathing disorders such as obstructive sleep apnea hypopnea syndrome. Traditional chest respiratory effort detection devices have many problems.

[0003] On the one hand, the connection between the detection probe and the fixing device is often complex and not convenient for replacement. When the detection probe fails or needs to be cleaned and maintained, it brings great inconvenience to medical staff and patients, and may affect the timeliness and continuity of detection. On the other hand, the fixing device is prone to looseness during the patient's sleep. Once loosened, the position of the detection probe will shift, resulting in inaccurate detection data and unable to truly reflect the patient's respiratory effort, thereby affecting the doctor's accurate judgment of the patient's sleep breathing condition and the formulation of subsequent treatment plans. Summary of the Invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a chest respiratory effort detection device for sleep detection that is convenient for replacement.

[0005] A chest respiratory effort detection device for sleep detection that is convenient for replacement proposed by the present invention includes a detection probe connected to a ventilator through a wire and a fixing band for fixing the detection probe. The detection probe is composed of a flexible substrate and an embedded distributed strain sensor array for detecting the surface strain caused by chest breathing. The detection probe is detachably fixed to the back of the fixing band, and the fixing band is detachably fixed to the patient's body. The fixing band is also provided with an anti-loosening mechanism for automatically tightening when the fixing band loosens. Install the detection probe on the back of the fixing band, and then fix the fixing band to the patient's body so that the detection probe is located at the patient's chest position, and then the respiratory effort can be detected. Then the detection data is transmitted to the ventilator. When the fixing band is displaced and loosened, the anti-loosening mechanism will automatically tighten the fixing band, thus avoiding inaccurate detection data.

[0006] Preferably, a magnetic suction sleeve is fixed at the middle position of the back of the fixing band. A plurality of magnets are installed on the surface of the magnetic suction sleeve in contact with the detection probe, and magnetic contacts are embedded on the surface of the detection probe in contact with the magnets. Place the detection probe into the magnetic suction sleeve, and in this way, the detection probe can be fixed by magnetic suction, thus facilitating the replacement of the detection probe.

[0007] Preferably, a D-ring is fixed at one end of the fixing belt, a female magic tape is fixed on the front side of the fixing belt near one end of the D-ring, and a male magic tape is fixed on the back side of the other end of the fixing belt; pass one end of the fixing belt through the D-ring and then tighten it, and then paste the male magic tape to an appropriate position on the female magic tape, then the fixing belt can be fixed to the patient's body and is convenient to replace.

[0008] Preferably, the anti-loosening mechanism includes a pressure acquisition module, a phase acquisition module, a control module and an actuator. The pressure acquisition module is used to measure in real time the phase difference of the respiratory movement signals caused by loosening on both sides of the fixing belt. The phase acquisition module is used to monitor in real time the pressure fluctuation caused by the displacement of the fixing belt. The actuator is used to tighten the fixing belt; the pressure acquisition module measures in real time the phase difference of the respiratory movement signals caused by loosening on both sides of the fixing belt and generates a bilateral respiratory signal phase difference. The phase acquisition module monitors in real time the pressure fluctuation caused by the displacement of the fixing belt and generates a pressure change rate of the contact surface between the fixing belt and the skin. The control module receives in real time the data collected by the pressure acquisition module and the phase acquisition module, conducts comprehensive analysis, and then generates a tightness evaluation coefficient. By comparing the tightness evaluation coefficient with a pre-set reference threshold of the tightness evaluation coefficient, it is judged whether the tightness degree of the fixing belt is within a reasonable range, and the working state of the actuator is controlled according to the comparison result. If the tightness degree of the fixing belt is not within a reasonable range, the actuator will be activated to tighten the fixing belt.

[0009] Preferably, three pressure acquisition modules are provided, which are respectively fixed on the center line of the back side of the fixing belt and the axilla extension areas on both sides. Two phase acquisition modules are respectively fixed at symmetric positions on the left and right sides of the fixing belt; in this way, it is possible to better measure the phase difference of the respiratory movement signals caused by loosening on both sides of the fixing belt through the pressure acquisition module, and better monitor the pressure fluctuation caused by the displacement of the fixing belt through the phase acquisition module.

[0010] Preferably, the actuator includes a micro air pump and two air bags provided on the fixing belt; when the micro air pump receives a corresponding instruction from the control module, it will be activated and then inflate one or both of the air bags.

[0011] Preferably, a card frame is fixed at the center position of the front side of the fixing belt, and a main control box is inserted into the card frame. The control module and the micro air pump are both installed in the main control box, and a sensor connector for connecting the pressure acquisition module and the phase acquisition module to the control module is installed on the top of the main control box. An air outlet pipe for connecting the air bag to the micro air pump is installed on the side of the main control box; insert the wire connectors of the pressure acquisition module and the phase acquisition module into the two sensor connectors respectively, and then connect the air outlet pipe and the air inlet pipe of the air bag through two hoses respectively, so as to complete the installation of the equipment.

[0012] Preferably, the airbag is fixed to the back of the corresponding sliding sleeve. The sliding sleeve is sleeved on the fixing belt. A male buckle is fixed to one inner wall of the sliding sleeve, and two groups of female buckles are symmetrically installed on the fixing belt and are matched with the corresponding male buckles. The position of the sliding sleeve can be adjusted adaptively according to the body types of different patients, and then the sliding sleeve is fixed by the cooperation of the male buckle and the female buckle, so as to ensure that the airbag can be in a proper position.

[0013] Preferably, a sleeve sleeved on the wire is fixed at the position where the housing of the detection probe is connected to the wire. The sleeve is elastic, and no less than two notches are opened at the bottom end of the sleeve. In this way, the stress point of the wire can be transferred to the position in contact with the edge of the bottom end of the sleeve, so as to effectively avoid the protective sleeve of the wire from being damaged easily at the original stress point. And because the sleeve is elastic, the wear on the protective sleeve can be reduced. Moreover, by opening the notches, a certain degree of activity can still be maintained at the bottom end of the sleeve, so as to further avoid the protective sleeve from being subjected to a large wear force.

[0014] Preferably, the control logic of the control module for the working state of the actuator is as follows:

[0015] I. Data acquisition stage:

[0016] Synchronously obtain Δθ; calculate dP / dt;

[0017] II. Generation of tightness evaluation coefficient:

[0018] Update the K value every 200 ms;

[0019] III. Trigger conditions of the actuator:

[0020] First-level response: When K>0.8, start the inflation of the unilateral airbag;

[0021] Second-level response: If K>1.2 for three consecutive cycles, inflate the bilateral airbags synchronously to the safe pressure and trigger the audible and visual alarm;

[0022] IV. Pressure maintenance and release:

[0023] Adopt the PID control algorithm to maintain the target pressure.

[0024] Compared with the prior art, the present invention provides a chest respiratory effort detection device for sleep detection that is convenient to replace, and has the following beneficial effects:

[0025] 1. A chest respiratory effort detection device for sleep detection that is easy to replace. By setting a magnetic suction sleeve at the middle position on the back of the fixing belt, multiple magnets are installed in the magnetic suction sleeve, and magnetic contacts are embedded on the side of the detection probe that contacts the magnet. The detection probe is fixed to the fixing belt by magnetic suction. This design makes the replacement of the detection probe extremely convenient. When the detection probe needs to be replaced, it only needs to be taken out of the magnetic suction sleeve and a new detection probe can be inserted, greatly improving the maintenance efficiency of the detection device and ensuring that the detection work can be carried out in a timely and smooth manner.

[0026] 2. A chest respiratory effort detection device for sleep detection that is easy to replace. The anti-loosening mechanism includes a pressure acquisition module, a phase acquisition module, a control module, and an actuator. The pressure acquisition module measures in real time the phase difference of the respiratory movement signals caused by loosening on both sides of the fixing belt, and the phase acquisition module monitors in real time the pressure fluctuations caused by the displacement of the fixing belt. The control module comprehensively analyzes the data collected by both to generate a tightness evaluation coefficient, compares it with a preset reference threshold, and controls the actuator to work according to the comparison result. When the fixing belt loosens, the actuator can automatically start to tighten the fixing belt, effectively avoiding the deviation of the detection probe position caused by the loosening of the fixing belt, ensuring the accuracy of the detection data, and providing a reliable basis for doctors to accurately judge the patient's sleep breathing condition.

[0027] 3. A chest respiratory effort detection device for sleep detection that is easy to replace. An elastic sleeve is fixed at the connection position between the detection probe housing and the wire, and at least two notches are opened at the bottom end of the sleeve. This design transfers the force-bearing point of the wire to the contact position at the bottom edge of the sleeve, uses the elasticity of the sleeve to reduce the wear on the wire protective sleeve, and at the same time the notches allow a certain degree of movement at the bottom end of the sleeve, further avoiding the protection sleeve from being subjected to a large wear force, effectively extending the service life of the wire and reducing the equipment maintenance cost.

[0028] 4. A chest respiratory effort detection device for sleep detection that is easy to replace. The control module has a perfect control logic for the working state of the actuator. During the data acquisition stage, Δθ is obtained synchronously and dP / dt is calculated, and the K value is updated every 200 ms to generate a tightness evaluation coefficient. The triggering conditions of the actuator are divided into a first-level response and a second-level response, corresponding to different emergency levels for unilateral or bilateral airbag inflation, and the PID control algorithm is used to maintain the target pressure. This precise control logic can react in a timely and effective manner according to the actual loosening situation of the fixing belt, ensuring that the fixing belt is always in a proper tightened state, greatly improving the stability and reliability of the detection device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a chest respiratory effort detection device for sleep detection that is easy to replace proposed by the present invention;

[0030] Figure 2 Schematic diagram of the first angle structure of a chest respiratory effort detection device for sleep detection that is easy to replace according to the present invention;

[0031] Figure 3 According to the present invention Figure 2 Enlarged schematic diagram of part A of the present invention;

[0032] Figure 4 Schematic diagram of the second angle structure of a chest respiratory effort detection device for sleep detection that is easy to replace according to the present invention;

[0033] Figure 5 Schematic diagram of the magnetic sleeve installation structure of a chest respiratory effort detection device for sleep detection that is easy to replace according to the present invention;

[0034] Figure 6 Schematic diagram of the sliding sleeve structure of a chest respiratory effort detection device for sleep detection that is easy to replace according to the present invention;

[0035] Figure 7 According to the present invention Figure 5 Enlarged schematic diagram of part B of the present invention;

[0036] Figure 8 Schematic diagram of the sleeve installation structure of a chest respiratory effort detection device for sleep detection that is easy to replace according to the present invention;

[0037] Figure 9 According to the present invention Figure 8 Enlarged schematic diagram of part C of the present invention.

[0038] In the figure: 1, detection probe; 2, fixing band; 3, pressure acquisition module; 4, phase acquisition module; 5, airbag; 6, main control box; 7, sensor connector; 8, air outlet pipe; 9, sliding sleeve; 10, male buckle; 11, female buckle; 12, magnetic sleeve; 13, magnet; 14, figure-eight buckle; 15, magic female sticker; 16, magic male sticker; 17, card frame; 18, sleeve; 19, notch. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0041] Referring to Figures 1-9 , a chest respiratory effort detection device for sleep detection that is convenient for replacement, including a detection probe 1 connected to a ventilator through a wire and a fixing band 2 for fixing the detection probe 1. The detection probe 1 is composed of a flexible substrate and an embedded distributed strain sensor array, and is used to detect the surface strain caused by chest respiration. The detection probe 1 is detachably fixed to the back of the fixing band 2, and the fixing band 2 is detachably fixed to the patient's body. An anti-loosening mechanism is also provided on the fixing band 2, and the anti-loosening mechanism is used to automatically tighten when the fixing band 2 becomes loose;

[0042] During use, the detection probe 1 is installed on the back of the fixing band 2, and then the fixing band 2 is fixed to the patient's body so that the detection probe 1 is located at the patient's chest position. The distributed strain sensor array generates a charge change through chest deformation, directly corresponding to the pressure measurement of the respiratory effort, and then transmits the detection data to the ventilator, and the respiratory effort can be detected. When the fixing band 2 is displaced and becomes loose, the anti-loosening mechanism will automatically tighten the fixing band 2, thus avoiding inaccurate detection data.

[0043] Among them, a magnetic suction sleeve 12 is fixed at the middle position of the back of the fixing band 2, and a plurality of magnets 13 are installed on the surface of the magnetic suction sleeve 12 in contact with the detection probe 1, and magnetic contacts are embedded on the surface of the detection probe 1 in contact with the magnets 13;

[0044] During use, the detection probe 1 is placed into the magnetic suction sleeve 12, and in this way, the detection probe 1 can be fixed by magnetic suction, thus facilitating the replacement of the detection probe 1.

[0045] Among them, a figure-eight buckle 14 is fixed at one end of the fixing band 2, a magic female sticker 15 is fixed on the front of the fixing band 2 near the figure-eight buckle 14, and a magic male sticker 16 is fixed on the back of the other end of the fixing band 2;

[0046] During use, one end of the fixing band 2 is passed through the figure-eight buckle 14 and then tightened, and then the magic male sticker 16 is pasted to an appropriate position on the magic female sticker 15, and the fixing band 2 can be fixed to the patient's body and is convenient for replacement.

[0047] Among them, the anti-loosening mechanism includes a pressure acquisition module 3, a phase acquisition module 4, a control module, and an actuator. The pressure acquisition module 3 is used to measure in real time the phase difference of the respiratory motion signals caused by loosening on both sides of the fixing belt 2. The phase acquisition module 4 is used to monitor in real time the pressure fluctuation caused by the displacement of the fixing belt 2. The actuator is used to tighten the fixing belt 2. The control module receives the data collected by the pressure acquisition module 3 and the phase acquisition module 4, generates a tightness evaluation coefficient, compares it with a preset reference threshold, and controls the working state of the actuator according to the comparison result;

[0048] It should be noted that the pressure acquisition module 3 can be a flexible capacitive pressure sensor or other devices that can measure in real time the phase difference of the respiratory motion signals caused by loosening on both sides of the fixing belt 2. The phase acquisition module 4 can be a piezoelectric film sensor or other devices that can monitor in real time the pressure fluctuation caused by the displacement of the fixing belt 2. The control module is an embedded controller (such as the STM32 series) integrated with a data fusion algorithm. Therefore, the pressure acquisition module 3, the phase acquisition module 4, and the control module are not specifically limited here and can be selected according to actual needs;

[0049] During use, the pressure acquisition module 3 measures in real time the phase difference of the respiratory motion signals caused by loosening on both sides of the fixing belt 2 and generates a bilateral respiratory signal phase difference. The phase acquisition module 4 monitors in real time the pressure fluctuation caused by the displacement of the fixing belt 2 and generates a pressure change rate of the contact surface between the fixing belt 2 and the skin. The control module receives in real time the data collected by the pressure acquisition module 3 and the phase acquisition module 4, conducts comprehensive analysis, then generates a tightness evaluation coefficient, compares the tightness evaluation coefficient with a preset reference threshold of the tightness evaluation coefficient, judges whether the tightness degree of the fixing belt 2 is within a reasonable range, and controls the working state of the actuator according to the comparison result. If the tightness degree of the fixing belt 2 is not within a reasonable range, the actuator will be activated to tighten the fixing belt 2.

[0050] Among them, three pressure acquisition modules 3 are provided, which are respectively fixed on the center line of the back of the fixing belt 2 and the axilla extension areas on both sides. Two phase acquisition modules 4 are respectively fixed at symmetrical positions on the left and right sides of the fixing belt 2;

[0051] During use, in this way, it is possible to better measure through the pressure acquisition module 3 the phase difference of the respiratory motion signals caused by loosening on both sides of the fixing belt 2, and better monitor through the phase acquisition module 4 the pressure fluctuation caused by the displacement of the fixing belt 2.

[0052] Among them, the actuator includes a micro air pump and two air bags 5 provided on the fixing belt 2;

[0053] During use, when the micro air pump receives a corresponding instruction from the control module, it will be activated and then inflate one or both of the air bags 5.

[0054] Among them, a card frame 17 is fixed at the central position on the front side of the fixing belt 2, a main control box 6 is inserted into the card frame 17, a control module and a micro air pump are both installed in the main control box 6, and a sensor connector 7 for connecting the pressure acquisition module 3 and the phase acquisition module 4 to the control module is installed on the top of the main control box 6, and an air outlet pipe 8 for communicating the airbag 5 with the micro air pump is installed on the side of the main control box 6;

[0055] During use, the wire connectors of the pressure acquisition module 3 and the phase acquisition module 4 are respectively inserted into the two sensor connectors 7, and then the air outlet pipe 8 and the air inlet pipe of the airbag 5 are respectively connected through two hoses, so as to complete the installation of the device.

[0056] Furthermore, the airbag 5 is fixed on the back surface of the corresponding sliding sleeve 9, the sliding sleeve 9 is sleeved on the fixing belt 2, a male buckle 10 is fixed on the inner wall of one side of the sliding sleeve 9, and two groups of female buckles 11 matched with the corresponding male buckles 10 are symmetrically installed on the fixing belt 2;

[0057] During use, the position of the sliding sleeve 9 can be adjusted adaptively according to the body types of different patients, and then the sliding sleeve 9 is fixed by the cooperation of the male buckle 10 and the female buckle 11, so as to ensure that the airbag 5 can be in a proper position.

[0058] In another embodiment, during the use process, the wire connected to the detection probe 1 is relatively thin, and because it needs to be taken out and used repeatedly and stored after use, the part where the wire is connected to the detection probe 1 is prone to breakage due to frequent bending forces. After breakage, the whole detection probe 1 needs to be replaced, and the replacement cost is not low. Therefore, in order to better protect the wire, referring to Figure 8 and Figure 9 , a sleeve 18 sleeved on the wire is fixed at the position where the shell of the detection probe 1 is connected to the wire. The sleeve 18 has elasticity, and no less than two notches 19 are opened at the bottom end of the sleeve 18;

[0059] During use, the stress point of the wire can be transferred to the position in contact with the bottom edge of the sleeve 18, so as to effectively avoid the protective sleeve of the wire from being easily damaged at the original stress point. And because the sleeve 18 has elasticity, the wear of the protective sleeve can be reduced. Moreover, by opening the notches 19, a certain degree of activity can still be maintained at the bottom end of the sleeve 18, so as to further avoid the protective sleeve from being subjected to a large wear force.

[0060] In another embodiment, the control logic for automatically tightening the fixing belt 2 through the cooperation among the pressure acquisition module 3, the phase acquisition module 4, the control module and the actuator is specifically as follows:

[0061] The specific control logic process is as follows:

[0062] I. Data acquisition stage (sampling frequency: 50 Hz):

[0063] Synchronously obtain Δθ; calculate dP / dt;

[0064] II. Generation of tightness evaluation coefficient:

[0065] Update the K value every 200 ms (sliding window mechanism)

[0066] III. Trigger conditions for the actuator:

[0067] First-level response: When K > 0.8, start inflating the unilateral airbag 5 (inflation pressure quantization formula: Q = K·Q max , Q max = 15 kPa);

[0068] Second-level response: If K > 1.2 for three consecutive cycles, inflate the bilateral airbags 5 synchronously to the safe pressure (20 kPa) and trigger an audible and visual alarm;

[0069] IV. Pressure maintenance and release:

[0070] Adopt the PID control algorithm to maintain the target pressure:

[0071]

[0072] Among them, e(t) = P target - P actual , parameter default values: K p = 2.0, K i = 0.5, K d = 0.1.

[0073] Among them, the calculation formula for the tightness evaluation coefficient is:

[0074]

[0075] In the formula, α, β: weight coefficients (default values, adjustable through user body type calibration), Δθ: phase difference of bilateral breathing signals (measured value), θ ref : reference phase difference (statistical value in the healthy wearing state, typical value 0.1 rad), dP / dt: pressure change rate (taking the maximum value of 3 groups of sensors), P th : pressure change threshold (empirical value 2.5 kPa / s).

[0076] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A chest respiratory effort detection device for sleep detection that is convenient for replacement, comprising a detection probe (1) connected to a ventilator through a wire and a fixing band (2) for fixing the detection probe (1), characterized in that, The detection probe (1) is composed of a flexible substrate and an embedded distributed strain sensor array, and is used to detect the surface strain caused by chest breathing. The detection probe (1) is detachably fixed to the back of the fixing belt (2), and the fixing belt (2) is detachably fixed to the patient's body. An anti-loosening mechanism is also provided on the fixing belt (2), and the anti-loosening mechanism is used to automatically tighten when the fixing belt (2) becomes loose.

2. The chest respiratory effort detection device for sleep detection that is easy to replace according to claim 1, characterized in that, A magnetic suction sleeve (12) is fixed at the middle position of the back of the fixing belt (2). A plurality of magnets (13) are installed on the surface of the magnetic suction sleeve (12) in contact with the detection probe (1), and magnetic contacts are embedded on the surface of the detection probe (1) in contact with the magnets (13).

3. The chest respiratory effort detection device for sleep detection that is convenient for replacement according to claim 1, wherein One end of the fixing belt (2) is fixed with a figure-eight buckle (14). A magic mother sticker (15) is fixed on the front of the fixing belt (2) near the figure-eight buckle (14), and a magic male sticker (16) is fixed on the back of the other end of the fixing belt (2).

4. The chest respiratory effort detection device for sleep detection that is easy to replace according to claim 1, characterized in that, The anti-loosening mechanism includes a pressure acquisition module (3), a phase acquisition module (4), a control module, and an actuator. The pressure acquisition module (3) is used to measure in real time the phase difference of the breathing motion signals caused by loosening on both sides of the fixing belt (2). The phase acquisition module (4) is used to monitor in real time the pressure fluctuation caused by the displacement of the fixing belt (2). The actuator is used to tighten the fixing belt (2). The control module receives the data collected by the pressure acquisition module (3) and the phase acquisition module (4) and generates a tightness evaluation coefficient, compares it with a preset reference threshold, and controls the working state of the actuator according to the comparison result.

5. The chest respiratory effort detection device for sleep detection that is easy to replace according to claim 4, wherein, Three pressure acquisition modules (3) are provided, and are respectively fixed on the center line of the back of the fixing belt (2) and the axilla extension areas on both sides. Two phase acquisition modules (4) are respectively fixed at symmetrical positions on the left and right sides of the fixing belt (2).

6. The chest respiratory effort detection device for sleep detection that is convenient to replace according to claim 4, wherein, The actuator includes a micro air pump and two air bags (5) provided on the fixing belt (2).

7. The chest respiratory effort detection device for sleep detection that is easy to replace according to claim 6, characterized in that, A card frame (17) is fixed at the center position of the front of the fixing belt (2). A main control box (6) is inserted into the card frame (17). The control module and the micro air pump are both installed in the main control box (6). And a sensor connector (7) for connecting the pressure acquisition module (3) and the phase acquisition module (4) to the control module is installed on the top of the main control box (6). An air outlet pipe (8) for connecting the air bag (5) to the micro air pump is installed on the side of the main control box (6).

8. The chest respiratory effort detection device for sleep detection that is convenient for replacement according to claim 6, wherein, The air bag (5) is fixed to the back of the corresponding sliding sleeve (9). The sliding sleeve (9) is sleeved on the fixing belt (2). A sub-buckle (10) is fixed on one inner wall of the sliding sleeve (9). Two groups of mother buckles (11) cooperating with the corresponding sub-buckles (10) are symmetrically installed on the fixing belt (2).

9. The chest respiratory effort detection device for sleep detection that is easy to replace according to claim 1, characterized in that, A sleeve (18) sleeved on the wire is fixed at the position where the shell of the detection probe (1) is connected to the wire. The sleeve (18) has elasticity, and no less than two notches (19) are opened at the bottom end of the sleeve (18).

10. A chest respiratory effort detection device for sleep detection that is easy to replace, as described in claim 4, characterized in that, The control logic of the control module for the working state of the actuator is as follows: I. Data acquisition stage: Synchronously obtain Δθ; calculate dP / dt; II. Generation of tightness evaluation coefficient: Update the K value every 200 ms; III. Trigger condition of the actuator: Level 1 response: When K > 0.8, start inflating the single-sided airbag (5); Level 2 response: If K > 1.2 for three consecutive cycles, inflate the bilateral airbags (5) synchronously to the safe pressure and trigger an audible and visual alarm; IV. Pressure maintenance and release: Adopt the PID control algorithm to maintain the target pressure.

Images