CN211066618U

CN211066618U - Pulmonary function measuring handle

Info

Publication number: CN211066618U
Application number: CN201921007575.0U
Authority: CN
Inventors: 吕亮
Original assignee: Shanghai Shuomao Network Technology Co ltd
Current assignee: SHANGHAI SHUOMAO MEDICAL DEVICES Co.,Ltd.
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-07-24
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses a pulmonary function measuring handle, which comprises a main machine and a flow tube; the flow tube is arranged at the top of the main machine and forms a T shape; the flow tube comprises a tube body, a mouthpiece and a pressure membrane; the front part of the tube body is of a cylindrical structure, and the rear part of the tube body is of a horn-shaped structure with a small front part and a large rear part; the utility model has the advantages that firstly, the lung function measuring handle of the utility model adopts the pressure difference principle to measure the gas flow and the pressure in the tube body, and the pushing of the data such as volume, flow and the like can be realized only by the slight change of the gas pressure data, thus having the advantages of high sensitivity and good linear characteristic; secondly, the utility model discloses a pulmonary function measurement handle adopts the gesture of triaxial acceleration sensor discernment host computer and flow tube, corrects and compensates gesture data through the algorithm, and pressure sensor who is has more stable output value when the angular state of difference.

Description

Pulmonary function measuring handle

Technical Field

The invention relates to the technical field of detection, in particular to a pulmonary function measuring handle.

Background

Lung function tests are one of the necessary tests for respiratory diseases. The method is mainly used for detecting the unobstructed degree of the respiratory tract and the lung volume, and has important clinical values in the aspects of detecting the pathological changes of the lung and the airway at an early stage, evaluating the severity and prognosis of the disease, evaluating the curative effect of a medicament or other treatment methods, identifying the cause of dyspnea, diagnosing the pathological change part, evaluating the tolerance of the lung function to the operation or the labor intensity tolerance, monitoring critical patients and the like. At present, the lung function instrument is a measuring instrument, can perform lung function test and track lung health conditions, and can measure common lung function detection parameters including FVC, FEV1, FEV1/FVC and the like.

Chronic respiratory diseases, cardiovascular and cerebrovascular diseases, malignant tumors and diabetes are called as 'four-major chronic diseases', but the attention of the public to the chronic respiratory diseases is still to be improved. The chronic obstructive pulmonary disease is characterized in that the chronic obstructive pulmonary disease is treated early after a mild early diagnosis, and related epidemiological investigation of chronic obstructive pulmonary disease in China shows that the prevalence rate of the chronic obstructive pulmonary disease is obviously increased, the prevalence rate of people over 40 years is increased by 67% in one decade, the prevalence number is increased from 4300 ten thousands to 9990 thousands, and is close to 1 hundred million people, and the chronic obstructive pulmonary disease becomes the most common chronic disease which is in equal measure with hypertension and diabetes.

Chronic disease is a disease that is not perceived by humans for most of the time during development. One is chronic obstructive pulmonary disease. Worldwide, people pay attention to diagnosis and treatment of few moderate and severe patients with chronic obstructive pulmonary disease, and neglect most of mild patients. In fact, in the population of patients with chronic obstructive pulmonary disease, the number of patients with mild stage I-II is more than 90%, and the majority of patients with mild or no symptoms. The main reason why the chronic obstructive pulmonary disease is difficult to treat and the reversibility of the course of the disease is late diagnosis and late treatment, which is far behind the concept that chronic diseases such as hypertension and diabetes are treated at an early diagnosis and treatment, so the detection of the pulmonary function is extremely important and urgent.

Disclosure of Invention

1. Technical problem to be solved

The purpose of the invention is as follows: the pulmonary function measuring handle is provided, high sensitivity and high linearity of pulmonary function detection are realized by utilizing a pressure difference principle, and meanwhile, the pulmonary function measuring handle has a convenient operation method and a simple structure and is convenient for middle-aged and elderly people to use.

2. Technical scheme

In order to achieve the purpose, the lung function measuring handle comprises a host and a flow tube, wherein the flow tube is arranged at the top of the host and is in a T shape, the flow tube comprises a tube body, a mouthpiece and a pressure membrane, the front portion of the tube body is of a cylindrical structure, the rear portion of the tube body is of a horn-shaped structure with a small front portion and a large rear portion, the mouthpiece is arranged at the front end of the tube body, a sensor conduit is arranged at the middle rear portion of the outer peripheral wall of the tube body, the pressure membrane is arranged at the rear end of the tube body, the host comprises a shell, a control module, a pressure sensor, a power supply key, a function key, an L CD display screen and a USB data interface, the pressure sensor, the power supply key, the function key, a L CD display screen and the USB data interface are arranged on the shell, the pressure sensor, the power supply key, the function key, the L CD display screen and the USB data interface are respectively and electrically connected with the.

The lung function measuring handle comprises a control module, a pressure sensor, a power supply key, a function key, a L CD display screen, a WIFI chip and an STM32 type main control chip, wherein the control module comprises an STM32 type main control chip, a power supply and a WIFI chip, the pressure sensor, the power supply key, the function key, the L CD display screen and the WIFI chip are electrically connected with the STM32 type main control chip, the USB data interface is in bidirectional communication connection with the STM32 type main control chip, and the.

The lung function measuring handle further comprises a three-axis acceleration sensor; the triaxial acceleration sensor with STM32 type main control chip electric connection.

Foretell pulmonary function measures handle, wherein, body periphery wall middle part is provided with fixed buckle, the casing top be provided with the fixed slot of fixed buckle looks adaptation.

Foretell pulmonary function measuring handle, wherein, the difficult to articulate periphery wall is provided with anti-skidding line, difficult to articulate cross section outline is oval, and the size is less than body cross section size.

In the lung function measuring handle, the pressure membrane is a high-density mesh structure made of metal wire or nylon wire.

Foretell handle is measured to pulmonary function, wherein, tubaeform structure, difficult to articulate and body axis coincidence, and the contained angle between tubaeform structure generating line and self axis is not more than 20.

Foretell pulmonary function measuring handle, wherein, tubaeform structure length is less than body length.

In the lung function measuring handle, a sealing ring is arranged on a contact side line of the sensor catheter and the catheter clamping groove.

3. Advantageous effects

In summary, the invention has the following beneficial effects:

(1) the lung function measuring handle adopts the differential pressure principle to measure the gas flow and pressure in the tube body, and can realize the pushing of data such as volume, flow and the like only by slight change of gas pressure data, so that the lung function measuring handle has the advantages of high sensitivity and good linear characteristic;

(2) the lung function measuring handle adopts the triaxial acceleration sensor to identify the postures of the host and the flow tube, and corrects and compensates posture data through an algorithm, so that the pressure sensor has stable output values in different angle states.

Drawings

Fig. 1 is a schematic view of the structure of a lung function measuring handle of the present invention.

FIG. 2 is a schematic view of the structure of a pulmonary function measurement handle flow tube of the present invention.

Fig. 3 is a schematic structural diagram of the lung function measuring handle main unit of the present invention.

Fig. 4 is a schematic circuit diagram of the pulmonary function measurement handle of the present invention.

Fig. 5 is a schematic diagram of the lung function measurement handle control module of the present invention.

FIG. 6 is a graph of output values of a pressure sensor versus three-axis acceleration values according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention are further described below with reference to the drawings.

Referring to fig. 1 to 5, the pulmonary function measuring handle comprises a main machine 1 and a flow tube 2, wherein the flow tube 2 is installed at the top of the main machine 1 and is in a T shape, the flow tube 2 comprises a tube body 3, a mouthpiece 4 and a pressure membrane 5, the front part of the tube body 3 is in a cylindrical structure, the rear part of the tube body is in a horn-shaped structure 301 with a small front part and a large rear part, the mouthpiece 4 is arranged at the front end of the tube body 3, a sensor tube 302 is arranged at the rear part of the outer peripheral wall of the tube body 3, the pressure membrane 5 is installed at the rear end of the tube body 3, the main machine 1 comprises a shell 6, a control module 7, a pressure sensor 8, a power key 9, a function key 10, an L CD display screen 11 and a USB data interface 12 which are installed on the shell 6, the pressure sensor 8, the power key 9, the function key 10, the L CD display screen 11 and the USB data interface 12 are respectively and electrically connected with the control module 7, a tube clamping groove 601 matched with the sensor tube 302 is formed at the top of the shell 6.

The control module 7 comprises an STM32 type main control chip 13, a power supply 14 and a WIFI chip 15, the pressure sensor 8, the power supply key 9, the function keys 10, the L CD display screen 11 and the WIFI chip 15 are electrically connected with the STM32 type main control chip 13, the USB data interface 12 is in bidirectional communication connection with the STM32 type main control chip 13, and the power supply 14 supplies power to the whole control module 7.

Also included is a three-axis acceleration sensor 16; the three-axis acceleration sensor 16 is electrically connected with the STM32 type main control chip 13.

The middle part of the outer peripheral wall of the pipe body 3 is provided with a fixing buckle 303, and the top of the shell 6 is provided with a fixing clamping groove 602 matched with the fixing buckle 303.

The 4 periphery walls of mouthpiece are provided with anti-skidding line 401, increase the oral cavity when sucking and the frictional force of mouthpiece, prevent that mouthpiece 4 from droing from the oral cavity easily, 4 cross section outlines of mouthpiece are oval, and the size is less than 3 cross section sizes of body, and this structure helps the parcel of lip, prevents to leak gas.

The pressure membrane 5 is a high-density net structure made of metal wires or nylon wires, after the gas flows into the tube body 3, part of the gas flows out of the small holes of the pressure membrane 5, when the gas approaches the pressure membrane 5, the flow tube cavity is enlarged, and the gas is dispersed to flow to the pressure membrane. Due to the resistance of the pressure film, the gas flowing into the flow tube cavity is temporarily larger than the gas flowing out of the pressure film hole, the gas can accumulate in the flow tube cavity, the pressure in the cavity becomes larger, the gas flows into the cavity faster, the accumulated gas in the flow tube cavity is more, and the generated pressure is higher. The pressure in the cavity is passed through the sensor catheter 302 to the pressure sensor 8 of the host 1.

Tubaeform structure 301, difficult to articulate 4 and 3 axis coincidence of body, and the contained angle between tubaeform structure 301 generating line and the self axis is not more than 20, tubaeform structure 301 length is less than 3 length of body, adopts the tubaeform structure 301 of little length to reduce the resistance that gas flows, and tubaeform structure 301's expansion angle is less simultaneously, when satisfying gas flow pressure for gas has certain concentration, avoids the gas diffusion too big and causes the not enough condition of pressure.

The contact edge line of the sensor conduit 302 and the conduit clamping groove 601 is provided with a sealing ring 17 for preventing gas leakage in the sensor conduit 302.

The use principle is as follows: the user blows air from the mouthpiece 4, the air enters the inner cavity of the tube body 3 from the mouthpiece 4 and flows out from the small hole on the pressure membrane 5, when the air approaches the pressure membrane 5, the flow cavity of the tube body 3 becomes large, and the air disperse phase flows through the pressure membrane 5. Because of the resistance of the pressure membrane 5, the gas in the inner cavity of the tube body 3 can be temporarily larger than the gas flowing out of the pressure membrane 5, the gas can accumulate in the inner cavity of the tube body 3 in a stroke way, the gas pressure in the cavity becomes large, so that the gas flowing speed is accelerated, more and more gas can be accumulated in the tube body 3, the generated pressure becomes larger and larger, finally, the gas pressure in the cavity is transmitted to the pressure sensor 8 of the host 1 through the sensor conduit 302, and the relationship between the gas flow rate and the gas pressure transmitted through the sensor conduit 302 is shown in fig. 6. Therefore, the pressure value measured by the pressure sensor 8 can reflect the gas flow velocity value in the tube body 3, and a series of results such as volume and the like can be obtained by integral operation after the gas flow velocity value is obtained, so that the lung function measurement is completed once.

The invention adopts the differential pressure type principle, the differential pressure type principle is used for a differential pressure type sensor, the working principle of the differential pressure type sensor is that the measured pressure directly acts on a diaphragm in the sensor to cause the diaphragm to generate micro displacement, and an electronic circuit is used for detecting the change and converting and outputting a standard measuring signal corresponding to the pressure. Although the mass of the diaphragm is very small, the diaphragm can be influenced by gravity when the precision requirement is very high, the gravity acts on the diaphragm to generate weak signals, and the weak signals can detect large errors of products of the bottom flow velocity pressure value, so the invention uses the three-axis acceleration sensor for detecting the attitude of equipment, and corrects and compensates data through an algorithm, so that the differential pressure sensor has relatively stable output values in different angle states. The differential pressure sensor is slowly rotated, and the relationship between the output value of the pressure sensor and the value of S is shown in fig. 6, and S is calculated by equation (1):

wherein, x, y, z are the numerical value that triaxial acceleration sensor gathered respectively.

Through the change relation, the numerical value collected by the pressure sensor can be compensated, so that the influence of gravity on the pressure sensor can be filtered, and the measurement accuracy is ensured.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the content of the present specification, or any direct or indirect application attached to other related technical fields are included in the scope of the present invention.

Claims

1. A pulmonary function measuring handle is characterized by comprising a host (1) and a flow tube (2), wherein the flow tube (2) is arranged at the top of the host (1) and is in a T shape, the flow tube (2) comprises a tube body (3), a mouthpiece (4) and a pressure membrane (5), the front portion of the tube body (3) is of a cylindrical structure, the rear portion of the tube body is of a horn-shaped structure (301) with a small front portion and a large rear portion, the mouthpiece (4) is arranged at the front end of the tube body (3), a sensor conduit (302) is arranged at the middle rear portion of the outer peripheral wall of the tube body (3), the pressure membrane (5) is arranged at the rear end of the tube body (3), the host (1) comprises a shell (6), a control module (7), a pressure sensor (8), a power supply key (9), a function key (10), an L CD display screen (11) and a USB data interface (12) which are arranged on the shell (6), the pressure sensor (8), the power supply key (9), the function key (10), the USB data display screen (11) and the USB data interface (12) are respectively connected with the pressure sensor (601), and a clamping groove (601) is formed in a clamping groove which is matched with the top of the pressure sensor (8).

2. The pulmonary function measuring handle according to claim 1, wherein the control module (7) comprises an STM32 type main control chip (13), a power supply (14) and a WIFI chip (15), the pressure sensor (8), the power supply key (9), the function key (10), a L CD display screen (11) and the WIFI chip (15) are electrically connected with the STM32 type main control chip (13), the USB data interface (12) is in bidirectional communication connection with the STM32 type main control chip (13), and the power supply (14) supplies power to the whole control module (7).

3. A lung function measuring handle according to claim 2, wherein: further comprising a three-axis acceleration sensor (16); the three-axis acceleration sensor (16) is electrically connected with the STM32 type main control chip (13).

4. A lung function measuring handle according to claim 1, wherein: body (3) periphery wall middle part is provided with fixed buckle (303), casing (6) top be provided with fixed buckle (303) looks adaptation's fixed slot (602).

5. A lung function measuring handle according to claim 1, wherein: the outer peripheral wall of the mouthpiece (4) is provided with anti-skid grains (401), the outer contour of the cross section of the mouthpiece (4) is oval, and the size of the cross section of the mouthpiece (4) is smaller than the size of the cross section of the pipe body (3).

6. A lung function measuring handle according to claim 1, wherein: the pressure membrane (5) is a high-density net structure made of metal wires or nylon wires.

7. A lung function measuring handle according to claim 1, wherein: the axis of the horn-shaped structure (301), the mouthpiece (4) and the tube body (3) are overlapped, and the included angle between the generatrix of the horn-shaped structure (301) and the axis of the horn-shaped structure is not more than 20 degrees.

8. A lung function measuring handle according to claim 7, wherein: the length of the horn-shaped structure (301) is less than that of the pipe body (3).

9. A lung function measuring handle according to claim 1, wherein: and a sealing ring (17) is arranged on the contact edge line of the sensor conduit (302) and the conduit clamping groove (601).