CN110251136A - The method of audio signal sample device and detection lung function applied to pulmonary function detection - Google Patents
The method of audio signal sample device and detection lung function applied to pulmonary function detection Download PDFInfo
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- 230000005236 sound signal Effects 0.000 title claims abstract description 41
- 230000004199 lung function Effects 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 230000009325 pulmonary function Effects 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 238000004458 analytical method Methods 0.000 claims description 23
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 12
- 238000009613 pulmonary function test Methods 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 1
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- 238000004891 communication Methods 0.000 description 5
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- 230000008569 process Effects 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013523 data management Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 210000004072 lung Anatomy 0.000 description 2
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- 238000004804 winding Methods 0.000 description 2
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
Abstract
The present invention relates to a kind of audio signal sample device applied to pulmonary function detection and the methods for detecting lung function, including a hollow inner housing, air inlet and air outlet are provided on inner housing, inner housing is internally provided at least one gas circuit, each gas circuit is connected to air inlet and air outlet, wherein a gas circuit is main gas circuit, other gas circuits are side gas circuit, block is provided in main gas circuit, block is towards offering a sound wave conduction hole on the inner housing side side wall of one end upstream of air inlet, sound wave conducts hole close to block, the audio collection device of one with sound wave conduction hole face are provided with outside the inner housing.The collecting test person of the present invention sound wave issued to detector air blowing, therefore do not need in terms of data acquisition using thermal flowmeter is arrived, so that the production cost of detector is significantly reduced, in order to popularizing for detector of the present invention.
Description
Technical field:
The present invention relates to a kind of audio signal sample device applied to pulmonary function detection and the methods for detecting lung function.
Background technique:
Pulmonary function detection is that the necessary of respiratory disease one of checks, mainly for detection of respiratory tract degree of mobility,
The size of lung volume, for early detection lung, airway lesions, assess disease coincident with severity degree of condition and prognosis evaluation drug or its
The curative effect of his treatment method, identifies the reason of having difficulty in breathing, and diagnosis diseased region assesses lung function to the tolerance or labor of operation
Fatigue resistance tolerance and there is important clinical value to the monitoring etc. of urgent patient.
Pulmonary function detection usually examines flow, the flow velocity of tester's exhaled gas using thermal flowmeter in hospital
It surveys, then flow, the flow speed data of collecting test person's exhaled gas analyze the data by computer, obtain lung function
Can parameter, the thermal flowmeter price that this hospital uses is again costly, it is impossible to universal by family, and along with atmosphere dirt
It is high-incidence to contaminate the respiratory disease caused, if it is possible to provide that a kind of price is human-oriented, function is analogous to the lung function of thermal flowmeter
Energy detector, then can popularize, and many people is enable to monitor itself lung function at any time, and discovery lung function parameter is abnormal,
It is medical in time, avoid respiratory disease from deteriorating.
Summary of the invention:
The technical problems to be solved by the present invention are: providing a kind of audio signal sample dress applied to pulmonary function detection
It sets, the apparatus structure is simple, and production cost is low, can popularize, itself lung function data is acquired convenient for many people,
Lung function parameter is obtained so that the analysis of Pulmonary Function device based on audio signal carries out analysis.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: the audio signal applied to pulmonary function detection
Acquisition device is provided with air inlet and air outlet including a hollow inner housing on inner housing, inner housing be internally provided with to
A few gas circuit, each gas circuit are connected to air inlet and air outlet, wherein a gas circuit is main gas circuit, other gas circuits are side gas
Road is provided with block in main gas circuit, and the sound wave that a main gas circuit of connection is offered on the inner housing side side wall of block upstream passes
Guide hole, sound wave conduct hole close to block, and the audio collection device that hole face is conducted with sound wave is provided with outside the inner housing.
As a preferred embodiment, the main gas circuit Upstream section is gradually narrowed compression section, and tract is a width
Not less than the air cavity of compression section, the compression section of main gas circuit and air cavity junction form a high pressure nozzle, and the block setting exists
In air cavity and with high pressure nozzle face.
As a preferred embodiment, three gas circuits are isolated by two pieces of partitions inside the inner housing, between two partitions
Gas circuit is that main gas circuit is connected to after the main gas circuit end and side gas circuit converge with gas outlet.
As a preferred embodiment, it is evenly arranged on inside the inner housing by the isolated tube and circumferential direction that are arranged along airflow direction
Connecting plate in isolation pipe outer wall is separated into a plurality of gas circuit, and the one end of connecting plate far from isolated tube is connect with inner housing inner wall,
In, the gas circuit inside isolated tube is main gas circuit, and the gas circuit outside isolated tube is side gas circuit, and the isolated tube includes position
Conical pipe in upstream and the straight tube that is socketed in outside conical pipe downstream, conical pipe upstream-end opening area are opened greater than downstream
Open area, from conical pipe downstream, upstream end cap is connected to straight tube upstream end and abuts with taper pipe outer wall straight tube, straight tube downstream
It extends radially outwardly to form support plate on outer wall, support plate connect with inner housing far from one end of straight tube and conducting hole just with sound wave
Right, straight tube downstream is located at the downstream of conical pipe downstream, and compression section, shape inside the straight tube in conical pipe downstream are formed in conical pipe
At air cavity, conical pipe downstream is high pressure nozzle, and block is located in air cavity and connect with straight tube inner wall, and the straight tube is located at block
It is offered on the tube wall of upstream side across support plate and conducts the elongated pore that hole is connected to the sound wave of inner casing body sidewall.
As a preferred embodiment, fluted, groove and high pressure nozzle is arranged in the one side of the block face high pressure nozzle
Face, the sound wave conduct hole proximate recesses bottom.
As a preferred embodiment, air cavity is separated into two branch gas circuits, the stream at the most narrow place of two branch gas circuits by the block
The sum of logical area is less than the opening area that main gas circuit is located at air inlet one end.
As a preferred embodiment, the partition positioned at high pressure nozzle two sides is at tip convex.
As a preferred embodiment, circlewise, inner hole is by being located at the straight hole section of upstream and positioned at the taper hole in downstream for block
Section is formed by connecting, and taper hole section downstream opening is less than upstream open, and block upstream end end face is kept off at towards the circular conical surface outside block
The upstream end end face of block and its medial surface are crossed to form sharp annular arris, annular arris and high pressure nozzle face or are located at height
In the diffusion region for the air-flow for pressing nozzle to spray.
As a preferred embodiment, the audio letter for sending the acquisition of audio collection device is additionally provided with outside the inner housing
Number signal sending assembly.
As a preferred embodiment, the audio collection device includes sound pick-up, circuit board and output data interconnected
Line, the signal sending assembly are the processor connecting with output data line, power supply and wireless signal hair connected to the processor
Penetrate module.
The issued sound wave the beneficial effects of the present invention are: collecting test person of the present invention blows to detector, with sound wave frequency
Rate and amplitude as detection data source, be supplied to the analysis of Pulmonary Function device based on audio signal carry out analysis obtain lung function join
Number, therefore do not need in terms of data acquisition using arriving thermal flowmeter, so that the production cost of detector is significantly reduced,
In order to popularizing for detector of the present invention.
The present invention, which further passes through, is arranged to compression section, air cavity and high pressure nozzle for main gas circuit, makes into main gas circuit
Gas is by compression travel high pressure gas before impacting block, and high pressure gas impact block can issue bigger sound wave, to make
Collected audio signal is obtained to become apparent from.
Groove is further arranged in the present invention on block, so that gas be made to shake in groove, further increases and collects
Audio signal, while obstructing the noise generated outside groove.
The present invention further passes through the circulation area of control branch gas circuit, makes to keep certain air pressure inside air cavity, avoids sound wave
The too fast loss of signal enhances the acquisition plumpness of audio signal.
The present invention further passes through setting side gas circuit, to ensure the smooth discharge of excess air flow, reduces expiratory resistance, avoids producing
Anger is stifled.
The present invention further passes through the baffle design will be located at high pressure nozzle two sides at tip convex, to eliminate partition pair
It is detached from the drainage of the air-flow of high pressure nozzle, the loss for the air-flow that high pressure nozzle sprays is reduced, further enhances acoustic signals.
The present invention further passes through setting signal sending assembly (power supply, processor and wireless signal transmitting module), can
Realization is connect with the wireless telecommunications of analytical equipment.
The present invention further uses the baffle of annular, is made a sound using the arris of baffle upstream end, adopts acquisition device
The audio signal of the gas peak flow rate (PFR) (PEF) of collection is apparent.
The further technical problems to be solved of the present invention are: providing one kind and acquired based on above-mentioned audio signal sample device
The method of the audio signal detection lung function arrived.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows: first by the collected sound of audio collection device
Frequency signal is sent to audio analysis device, which is formed to the map of sound power and time by audio analysis device,
And further according to the relationship of sound power and time calculate pulmonary function test (pft) project FEV1 ', PEF ' based on audio and
FEV1 '/FVC ' value, then according to proportionality coefficient by pulmonary function test (pft) project FEV1 ', PEF ' and FEV1 ' based on audio/
The value of FVC ' is converted to the value of pulmonary function test (pft) project FEV1, PEF and FEV1/FVC based on gas flow, is finally detected
The lung function data of person
The beneficial effects of the present invention are: detecting lung function by audio, can greatly reduce for acquiring lung function
The cost of the data source of detection enables a user to carry out itself lung function with extremely low investment the detection of normalization, accomplished
It finds the problem in time timely treatment.
Detailed description of the invention:
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is half section structure diagram of the invention；
Fig. 2 is the A-A cross-sectional view in Fig. 1；
Fig. 3 is the structural scheme of mechanism using the audio signal sample device of wire communication mode；
Fig. 4 is the B-B cross-sectional view in Fig. 3；
Fig. 5 is the structural schematic diagram of another specific embodiment of the invention；
Fig. 6 is on the basis of Fig. 5 using the structural schematic diagram of the acquisition device of ring shaped stopper.
In FIG. 1 to FIG. 6: 1, inner housing, 2, air inlet, 3, gas outlet, 4, main gas circuit, 4-1, compression section, 4-2, air cavity, 4-
3, high pressure nozzle, 5, side gas circuit, 6, block, 6-1, groove, 7, sound wave conduction hole, 8, branch gas circuit, 9-1,9, audio collection device are picked up
Sound device, 9-2, circuit board, 9-3, output data line, 10, power supply, 11, processor, 12, wireless signal transmitting module, 13, partition,
14, fixing shell body, 15, installation cavity, 16, pilot hole, 17, wrapping post, 18, locker room, 19, movable housing, 20, audio analysis
Device, 21, cable-through hole, 22, signal sending assembly, 23, isolated tube, 23-1, conical pipe, 23-2, straight tube, 24, connecting plate, 25,
Support plate, 26, elongated pore, 27, straight hole section, 28, taper hole section, 29, circular conical surface, 30, arris.
Specific embodiment:
With reference to the accompanying drawing, detailed description of the present invention specific embodiment.
Embodiment 1:
It as depicted in figs. 1 and 2, include a hollow inner housing applied to the audio signal sample device of pulmonary function detection
1, be provided with air inlet 2 and gas outlet 3 on inner housing 1, be isolated into three gas circuits by two pieces of partitions 13 inside inner housing 1, two every
Gas circuit between plate 13 is main gas circuit 4, other gas circuits are side gas circuit 5, and each gas circuit is connected to air inlet 2 and gas outlet 3, main gas
4 end of road (i.e. downstream) is connected to after converging with side gas circuit 5 with gas outlet 3, and three gas circuits can not also be each in downstream convergence
It is connected to from gas outlet 3；4 Upstream section of main gas circuit is gradually narrowed compression section 4-1, and tract is that a width is greater than pressure
The air cavity 4-2, the compression section 4-1 of main gas circuit 4 of contracting section 4-1 and the junction air cavity 4-2 form a high pressure nozzle 4-3, air cavity 4-2
Inside it is provided with a block 6, block 6 and high pressure nozzle 4-3 face.Block 6 is fixedly connected with 1 two sidewalls of inner housing, and 6 liang of block
Side forms branch gas circuit 8, and block 6 is towards offering a sound wave conduction on the 1 side side wall of inner housing of one end upstream of air inlet 2
Hole 7, sound wave conduct hole close to block 6, as shown in Fig. 2, being provided with the sound of one with sound wave conduction 7 face of hole outside inner housing 1
Frequency collector 9, audio collection device 9 and 20 communication connection of audio analysis device.
In the specific implementation process, the width of air cavity 4-2 can be adjusted according to actual needs, and width can also be with compression
The equivalent width of section 4-1.
Fluted 6-1, groove 6-1 and high pressure nozzle 4-3 face is arranged in the one side of the 6 face high pressure nozzle 4-3 of block,
The sound wave conducts 7 bottom proximate recesses 6-1 of hole.
Although in the present embodiment, block 6 realizes sounding using face and high pressure nozzle 4-3 face, ring can also be used
Shape block 6 realizes sounding.
Air cavity 4-2 is separated into two branch gas circuits 8 by the block 6, and the sum of the circulation area at the most narrow place of two branch gas circuits 8 is small
It is located at the opening area of 2 one end of air inlet in main gas circuit 4.
As shown in Fig. 2, also setting up audio signal for acquiring audio collection device 9 outside inner housing 1 in a wireless form
Be sent to the signal sending assembly 22 of audio analysis device 20, the signal sending assembly by 10, processors 11 of a power supply,
And wireless signal transmitting module 12 is constituted, the audio collection device 9, wireless signal transmitting module 12 respectively with processor
11 are electrically connected, and the power supply 10 is used to provide electric energy, institute to processor 11, audio collection device 9, wireless signal transmitting module 12
It states processor 11 and audio signal is sent to by audio analysis device 20 by wireless signal transmitting module 12.
As shown in Figure 1, being located at the partition 13 of the two sides high pressure nozzle 4-3 into tip convex.
As shown in Fig. 2, the inner housing 1 offer sound wave conduction hole 7 side outer wall on be connected with fixing shell body 14,
There is installation cavity 15, the audio collection device 9 is arranged in installation cavity 15, the fixing shell body 14 inside fixing shell body 14
With offered on the side side wall of 1 face of inner housing with sound wave conduction 7 face of hole pilot hole 16, the audio collection device 9
Sound pick-up 9-1 is fixedly mounted in the pilot hole 16, and locker room 18 is provided on the inner housing 1, is set on fixing shell body 14
It is equipped with the cable-through hole 21 communicated with locker room 18, the power supply 10, processor 11, wireless signal transmitting module 12 are installed in and deposit
In storage chamber 18.
Audio collection device 9 is microphone, is made of sound pick-up 9-1, circuit board 9-2 and output data line 9-3, output data
Line 9-3 is connected on circuit board 9-2, as shown in Fig. 2, circuit board 9-2 is fixedly connected in installation cavity 15, sound pick-up 9-1 and electricity
While road plate is electrically connected, in one end plugging in fitting hole 16, output data line 9-3 passes through cable-through hole 21 and processor 11 electrically
Connection.
The movable housing 19 that can cover locker room 18, the movable guard are provided on 1 other side outer wall of inner housing
One end of shell 19 and inner housing 1 or fixing shell body 14 are hinged.
In the present embodiment, partition 13 is hollow structure, which is produced when can be improved high pressure draught impacting clapboard 13
Raw intensity of acoustic wave, while the sound wave in 13 downstream of partition can be formed and be obstructed, reduce noise.
In above-described embodiment, audio collection device 9 passes through power supply signal sending assembly 22 in a manner of wireless telecommunications
10, processor 11 and wireless signal transmitting module 12 and audio analysis device 20 realize communication connection, in the specific implementation process,
Communication connection, specific connection structure can also be realized by wired connection mode are as follows: as shown in Figure 3 and Figure 4, inner housing 1 opens up
It is connected with fixing shell body 14 on the side outer wall for having sound wave conduction hole 7, there is installation cavity 15, audio inside fixing shell body 14
Collector 9 is arranged in installation cavity 15, offers on the fixing shell body 14 and the side side wall of 1 face of inner housing and sound wave
The pilot hole 16 of 7 face of hole is conducted, the sound pick-up 9-1 of the audio collection device 9 is fixedly mounted in the pilot hole 16, described solid
Determine outer housing 14 towards a wrapping post 17 is also connected on the side outer wall of inner housing 1, be provided on the inner housing 1 with around
The corresponding locker room 18 of terminal 17, wrapping post 17 are inserted into locker room 18, and annular is formed between wrapping post 17 and locker room 18
Winding space is provided with the cable-through hole 21 communicated with locker room 18, the output number of the audio collection device 9 on fixing shell body 14
It is stored in winding space by cable-through hole 21 into locker room 18 and on wrapping post 17 according to line 9-3.
Working principle of the present invention is: as depicted in figs. 1 and 2, tester mouthful blows to the air inlet 2 of signal pickup assembly,
The gas of blowout is divided into three tunnels, and two-way is flowed from side gas circuit 5 to gas outlet 3, flows all the way from main gas circuit 4 to gas outlet 3,
In, the air-flow of side gas circuit 5 is not considered, and the air-flow in main gas circuit 4 is pressed to form high pressure draught, high pressure draught through compression section 4-1
Air cavity 4-2 is sprayed into from high pressure nozzle 4-3, issues sound wave with the collision of block 6 being arranged in air cavity 4-2, sound wave is passed by sound wave
Guide hole 7 is propagated outward, is acquired by audio collection device 9 to the sound wave propagated from, when signal pickup assembly is not installed wirelessly
When signal emission module 12, audio collection device 9 is directly docked with audio analysis device 20 by output data line 9-3, audio letter
Number directly by output data line 9-3 input audio analytical equipment 20, after audio analysis device 20 receives audio signal, according to sound
Frequency signal carries out Data Management Analysis, obtains the lung function parameter of tester, for example (FEV1 is done most after maximum deep air-breathing to FEV1
It is big to exhale, maximum exhale exhalation in first second tolerance volume), (maximum expiratory flow volume refers to that forced vital capacity measured to PEF
Cheng Zhong, moment flow velocity when exhalation flow rate is most fast, also referred to as Peak expiratory flow, the strength of key reaction respiratory muscle and air flue whether there is or not
Obstruction.), FEV1/FVC (FVC: forced vital capacity (forced vital capacity, the FVC) past claim timed vital capacity, be
Refer to after doing the best maximum air-breathing, the maximum tolerance that can be breathed out of exhaling as early as possible as possible.
When signal pickup assembly is mounted with wireless signal transmitting module, audio signal is sent to processor 11 first, by
Processor 11 controls wireless signal transmitting module 12 again and audio signal is sent to audio analysis device by wireless communication mode
20。
In the present embodiment, audio analysis device 20 be equipped with analysis software calculator, mobile phone, tablet computer etc. can
For the equipment of software installation and Data Management Analysis, the lung function ginseng of tester can be calculated based on audio signal by analyzing software
Number.
Embodiment 2:
Audio signal sample device applied to pulmonary function detection as shown in Figure 5, the device include one hollow interior
Shell 1, is provided with air inlet 2 and gas outlet 3 on inner housing 1, inside inner housing 1 by the isolated tube 23 that is arranged along airflow direction with
And the circumferential connecting plate 24 being evenly arranged on 23 outer wall of isolated tube is separated into a plurality of gas circuit, the one end of connecting plate 24 far from isolated tube 23
It is connect with 1 inner wall of inner housing, wherein the gas circuit inside isolated tube 23 is main gas circuit 4, the gas circuit outside isolated tube 23
For side gas circuit 5, the isolated tube 23 is by being located at the conical pipe 23-1 of upstream and being socketed in straight outside the downstream conical pipe 23-1
Pipe 23-2, conical pipe 23-1 upstream-end opening area are greater than downstream-end opening area, and straight tube 23-2 is from the downstream conical pipe 23-1
Upstream end cap is connected to the upstream end straight tube 23-2 and abuts with conical pipe 23-1 outer wall, on the outer wall of the downstream straight tube 23-2 radially outward
Support plate 25 is extended to form, the one end of support plate 25 far from straight tube 23-2 is connect with inner housing 1, and the downstream straight tube 23-2 is located at cone
The downstream of the downstream shape pipe 23-1, conical pipe 23-1 is interior to form compression section 4-1, shape inside the straight tube 23-2 in the downstream conical pipe 23-1
At air cavity 4-2, the downstream conical pipe 23-1 is high pressure nozzle 4-3, and block 6 is located in air cavity 4-2 and connects with straight tube 23-2 inner wall
It connects, the straight tube 23-2 is located at the sound wave offered on the tube wall of 6 upstream side of block across support plate 25 and with 1 side wall of inner housing
Conduct the elongated pore 26 that hole 7 is connected to.
As shown in figure 5, the block 6 is fixedly connected on straight tube 23-2 roof, 6 lower end of block is hanging, block 6 and straight tube
Branch gas circuit 8, block 6 and high pressure nozzle 4-3 face are formed between 23-2, are opened on the straight tube 23-2 roof of 6 upstream side of block
Equipped with elongated pore 26, which passes through the support plate 25 on the outer top surface straight tube 23-2 and extends to 1 roof of inner housing
On sound wave conduct hole 7, the inner housing 1 be externally connected to covering sound conduction hole 7 fixing shell body 14, fixing shell body
The audio collection device 9 with 7 face of sound conduction hole is provided in 14.
In the present embodiment, the side of 6 face high pressure nozzle 4-3 of block is a plane, and in the specific implementation process,
The side of the block towards high pressure nozzle 4-3 can also be the combination in rib or rib and face, and the lung function as shown in FIG. 6 that is applied to is examined
The audio signal sample device of survey is just used with the structure of arris sounding.
As shown in fig. 6, in the technical scheme, circlewise, inner hole is branch gas circuit 8 to block 6, and inner hole is by being located at upstream
Straight hole section 27 and taper hole section 28 positioned at downstream are formed by connecting, and 28 downstream opening of taper hole section is less than upstream open, to avoid sound wave
Too fast loss.6 upstream end end face of block is at towards the circular conical surface 29 outside block 6, and circular conical surface 29 and straight tube 23-2 inner wall are with circle
Cambered surface transition, the upstream end end face of block 6 and its medial surface are crossed to form sharp annular arris 30, annular arris 30 and high pressure
In the diffusion region of nozzle 4-3 face or the air-flow positioned at high pressure nozzle 4-3 ejection.
In the present embodiment 2, for the collected acoustic signals of audio collection device 9 to the transmission mode of audio analysis device 20
Same as Example 1, details are not described herein again, and for the specific mounting means of audio collection device 9, signal sending assembly 22, it can
It is determined according to the specific structure of signal pickup assembly.
In the present embodiment 2, inner housing 1 and straight tube 23-2, support plate 25 can be made into it is integrated, to simplify connection structure.
The working principle of the present embodiment 2 is similar to Example 1, user from air inlet 2 to inner housing 1 inside blow, one
Portion gas enters main gas circuit 4, and in compression section, 4-1 is compressed into high pressure gas, sprays through high pressure nozzle 4-3 and enters air cavity 4-2,
Impact makes a sound on the blocking surface of block 6 or on arris, and sound conducts hole 7 to inner housing 1 by elongated pore 26 and sound wave
The sound pick-up 9-1 of outer propagation, the audio collection device 9 being located in fixing shell body 14 is acquired, and audio collection device 9 is sent out by signal
Audio signal is sent to audio analysis device by sending component 22.
Embodiment 3:
Based on the method for audio signal sample device detection lung function, first by the collected audio signal of audio collection device
It is sent to audio analysis device 20, which is formed to the map of sound power and time by audio analysis device 20, and
Further according to the relationship of sound power and time calculate pulmonary function test (pft) project FEV1 ', PEF ' and FEV1 ' based on audio/
The value of FVC ', then according to proportionality coefficient by pulmonary function test (pft) project FEV1 ', PEF ' and FEV1 '/FVC ' value based on audio
It is converted to the value of pulmonary function test (pft) project FEV1, PEF and FEV1/FVC based on gas flow, the final lung function for obtaining tester
It can data.
Above-mentioned each pulmonary function test (pft) project based on audio is corresponding with a proportionality coefficient, and each test item is corresponding
Proportionality coefficient determination method it is identical, below by taking the proportionality coefficient k between PEF ' and PEF as an example, be described in detail proportionality coefficient k
Determination method.
Thermal flowmeter pulmonary function detection device is connected with audio signal sample device first, then to more people into
Row test, be collected simultaneously expiratory gas flow and time that more people are detected by thermal flowmeter pulmonary function detection device map,
The sound power and the map of time detected by audio collecting device, and everyone PEF and PEF ' are calculated separately out, so
Pass through PEF/PEF ' afterwards and calculate proportionality coefficient k1, k2, k3 ... kn between everyone PEF and PEF ', everyone calculates
PEF and the proportionality coefficient of PEF ' may be different, therefore calculate average proportions coefficient k 0 again as between final PEF and PEF '
Proportionality coefficient, when using the proportionality coefficient, PEF=PEF ' * k0.
The calculation method of the corresponding proportionality coefficient of other two kinds of test items is same as above, and details are not described herein again.
The principles and effects of the invention, and the embodiment that part uses only is illustrated in above-described embodiment,
And is not intended to limit the present invention；It should be pointed out that for those of ordinary skill in the art, not departing from the invention structure
Under the premise of think of, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (10)
1. being applied to the audio signal sample device of pulmonary function detection, which is characterized in that including a hollow inner housing (1),
Air inlet (2) and gas outlet (3) are provided on inner housing (1), inner housing (1) is internally provided at least one gas circuit, each item gas
Road is connected to air inlet (2) and gas outlet (3), wherein a gas circuit is main gas circuit (4), other gas circuits are side gas circuit (5), main gas
It is provided on road (4) block (6), the main gas circuit (4) of connection is offered on inner housing (1) side side wall of block (6) upstream
Sound wave conduct hole (7), sound wave conducts hole (7) close to block (6), and one is provided with outside the inner housing (1) and is passed with sound wave
The audio collection device (9) of guide hole (7) face.
2. audio signal sample device according to claim 1, which is characterized in that main gas circuit (4) Upstream section be by
It tapers narrow compression section (4-1), tract is the air cavity (4-2) that a width is not less than compression section (4-1), main gas circuit (4)
Compression section (4-1) and the air cavity junction (4-2) form a high pressure nozzle (4-3), and the block (6) is arranged at air cavity (4-2)
It is interior and with high pressure nozzle (4-3) face.
3. audio signal sample device according to claim 2, which is characterized in that the inner housing (1) is internal by two pieces
Partition (13) is isolated into three gas circuits, and the gas circuit between two partitions (13) is main gas circuit (4), main gas circuit (4) end and side
After gas circuit (5) convergence, it is connected to gas outlet (3).
4. audio signal sample device according to claim 2, which is characterized in that the inner housing (1) is internal by along gas
The isolated tube (23) of stream direction setting and the circumferential connecting plate (24) being evenly arranged on isolated tube (23) outer wall are separated into a plurality of gas
Road, connecting plate (24) are connect far from the one end of isolated tube (23) with inner housing (1) inner wall, wherein it is internal to be located at isolated tube (23)
Gas circuit be main gas circuit (4), being located at isolated tube (23) external gas circuit is side gas circuit (5), and the isolated tube (23) includes being located at
The conical pipe (23-1) of upstream and the straight tube (23-2) being socketed in outside the downstream conical pipe (23-1), the upstream conical pipe (23-1)
End opening area is greater than downstream-end opening area, and from the downstream conical pipe (23-1), upstream end cap is connected to straight tube to straight tube (23-2)
The upstream end (23-2) is abutted with conical pipe (23-1) outer wall, extends radially outwardly to form support on the outer wall of the downstream straight tube (23-2)
Plate (25), support plate (25) connect with inner housing (1) far from the one end of straight tube (23-2) and conduct hole (7) face with sound wave, directly
The pipe downstream (23-2) is located at the downstream of the downstream conical pipe (23-1), forms compression section (4-1) in conical pipe (23-1), taper
It manages and forms air cavity (4-2) inside the straight tube (23-2) in the downstream (23-1), the conical pipe downstream (23-1) is high pressure nozzle (4-3),
Block (6) is located in air cavity (4-2) and connect with straight tube (23-2) inner wall, and the straight tube (23-2) is located at block (6) upstream side
Tube wall on offer across support plate (25) and with the sound wave of inner housing (1) side wall conduction hole (7) elongated pore (26) that is connected to.
5. audio signal sample device according to claim 3 or 4, which is characterized in that block (6) the face high pressure spray
Fluted (6-1) is arranged in the one side of mouth (4-3), groove (6-1) and high pressure nozzle (4-3) face, and sound wave conduction hole (7) is tight
Adjacent groove (6-1) bottom.
6. audio signal sample device instrument according to claim 5, which is characterized in that the block (6) is by air cavity (4-2)
Two branch gas circuits (8) are separated into, the sum of the circulation area at two most narrow places of branch gas circuit (8) is less than main gas circuit (4) and is located at air inlet
(2) opening area of one end.
7. audio signal sample device according to claim 3, which is characterized in that be located at the two sides high pressure nozzle (4-3)
Partition (13) is at tip convex.
8. audio signal sample device according to claim 3 or 4, which is characterized in that block (6) circlewise, inner hole
Taper hole section (28) by being located at the straight hole section (27) of upstream and positioned at downstream is formed by connecting, and taper hole section (28) downstream opening is less than upper
Trip opening, block (6) upstream end end face at the circular conical surface (29) external towards block (6), the upstream end end face of block (6) and its
Medial surface is crossed to form sharp annular arris (30), annular arris (30) and high pressure nozzle (4-3) face or is located at high pressure spray
In the diffusion region for the air-flow that mouth (4-3) sprays.
9. audio signal sample device according to claim 1, which is characterized in that also set up outside the inner housing (1)
There is the signal sending assembly (22) of the audio signal for sending audio collection device (9) acquisition, the audio collection device (9) includes
Sound pick-up (9-1), circuit board (9-2) and output data line (9-3) interconnected, the signal sending assembly (22) be with it is defeated
The processor (11) of data line (9-3) connection out, the power supply (10) and wireless signal transmitting module being connect with processor (11)
(12)。
10. the method based on the detection lung function of audio signal sample device described in claim 1, which is characterized in that first by sound
The collected audio signal of frequency collector is sent to audio analysis device (20), by audio analysis device (20) by the audio signal
The map of sound power and time is formed, and the lung function based on audio is further calculated according to the relationship of sound power and time
Test item FEV1 ', PEF ' and FEV1 '/FVC ' value, then according to proportionality coefficient by the pulmonary function test (pft) project based on audio
FEV1 ', PEF ' and FEV1 '/FVC ' value are converted to pulmonary function test (pft) project FEV1, PEF and FEV1/ based on gas flow
The value of FVC, the final lung function data for obtaining tester.
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