CN107219333B - Exhaled gas detection system and detection method - Google Patents
Exhaled gas detection system and detection method Download PDFInfo
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- CN107219333B CN107219333B CN201710359290.2A CN201710359290A CN107219333B CN 107219333 B CN107219333 B CN 107219333B CN 201710359290 A CN201710359290 A CN 201710359290A CN 107219333 B CN107219333 B CN 107219333B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/00584—Control arrangements for automatic analysers
- G01N35/00594—Quality control, including calibration or testing of components of the analyser
- G01N35/00693—Calibration
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Abstract
The present invention relates to detection technique fields, provide a kind of exhaled gas detection system, comprising: first flow sensor, for acquiring the data on flows of exhaled gas；Sampling pump is used for collection part exhaled gas；Gas sensor with described using pump connection, and detects the exhaled gas that sampling pump is collected into；Processor is connect with the first flow sensor and the sampling pump；Storage medium stores a plurality of instruction in the storage medium, and described instruction makes the processor receive the first flow sensor collected data on flows when being executed by the processor, and controls the collection voltage for inputting the sampling pump.The present invention also provides a kind of exhaled gas detection methods.Detection system of the invention can collect voltage according to the flow real-time control of exhaled gas, and then constant by the flow that the exhaled gas that voltage maintains sampling pump to collect is collected in control, improve the accuracy of detection.
Description
Technical field
The present invention relates to a kind of detection technique fields, and in particular to a kind of exhaled gas detection system and detection method.
Background technique
The gas of people's exhalation includes the multiple compounds such as oxygen, carbon dioxide, nitric oxide, exhaled gas as blood,
Urine is the same, can largely reflect the health information of human body.Therefore, the component of exhaled gas, content are carried out
Detection has important medical significance.
It is at present usually to be detected using equipment such as chemical sensor, photoelectric sensors to the exhaled gas of people.But people
Respiratory be generally divided into expiration phase and expiratory phase, the gas of expiration phase and expiratory phase exhalation flow there are one
Determine the fluctuation of degree, this just will affect the accuracy of exhaled gas detection；The less gas of content carries out in exhaled gas
When detection, accuracy is lower.The prior art generallys use the disperse of by-pass flow aperture or the mode of increase sampling pump extraction gas carries out
Sampling, but by-pass flow aperture disperse usually requires time progress disperse in one minute or so, causes detection time long；And respiratory
The variation of middle exhaled gas flow will lead to the sampling flow fluctuation of sampling pump, so that exhaled gas detection accuracy is low.
Long for existing exhaled gas detection time, the low problem of detection accuracy, the present invention provides a kind of expiratory airs
Physical examination examining system and detection method, in exhaled gas detection system be arranged sampling pump and to input sample pump collection voltage into
Row control, it is constant by adjusting the flow for collecting the exhaled gas that voltage maintains the sampling pump to collect, so as to avoid because exhaling
The fluctuation of exhaled gas flow is influenced caused by testing result during suction, improves the accuracy to exhaled gas detection.
Summary of the invention
The purpose of the present invention is to provide a kind of exhaled gas detection system and detection methods, for solving in respiratory
The low problem of detection accuracy caused by the flowed fluctuation of exhaled gas.
It is an object of the present invention to provide a kind of exhaled gas detection systems, comprising:
First flow sensor, for acquiring the data on flows of exhaled gas；
Sampling pump is used for collection part exhaled gas；
Gas sensor with described using pump connection, and detects the exhaled gas that sampling pump is collected into；
Processor passes through circuit connection with the first flow sensor and the sampling pump；
Storage medium stores a plurality of instruction in the storage medium, and described instruction makes institute when being executed by the processor
It states processor and receives the collected data on flows of first flow sensor, and control the collection electricity for inputting the sampling pump
Pressure.
Further, calibration gas output flow-voltage curve is also stored in the storage medium, described instruction is by institute
State when processor executes that corresponding voltage value determines in calibration gas output flow-voltage curve according to the data on flows
The collection voltage；Calibration gas output flow-the voltage curve are as follows: the stream for the calibration gas for maintaining the sampling pump to collect
When measuring constant, the relation curve between the flow of the calibration gas and the voltage of the input sampling pump is exported；Or,
The detection system further includes calibration unit, and the calibration unit includes calibration gas source and second flow sensor；
The calibration gas source is used to export the calibration gas of different flow；The second flow sensor is received for acquiring the sampling pump
The flow of the calibration gas collected.
Further, the detection system further include calibration the end PC, the end calibration PC respectively with the processor, calibration
Gas source and the connection of second flow sensor；The calibration end PC is used to control the stream of the calibration gas of the calibration gas source output
Amount, the voltage of the sampling pump is inputted by processor control, and receives the stream of the second flow sensor acquisition
Measure data.
Further, the first flow sensor is pressure sensor or flow sensor.
Further, the detection system further includes exhaust tube, and the first flow sensor is set in the exhaust tube；
The sampling pump is used for the exhaled gas that collection part is flowed through out of described exhaust tube.
Further, the gas sensor is semiconductor gas sensor, electrochemical gas sensor, catalytic combustion type
Gas sensor, thermal conductivity gas sensor, infrared gas sensor or solid-state electrolyte gas sensor.
Second object of the present invention is to provide a kind of detection method of above-mentioned exhaled gas detection system, including following
Step:
S1, the data on flows that exhaled gas is acquired by the first flow sensor；
S2, the collection voltage that the sampling pump is inputted according to data on flows control；
S3, it is detected by the exhaled gas that the gas sensor is collected into the sampling pump.
Further, the step S2 the following steps are included:
S21, according to the data on flows acquired in step S1 in calibration gas output flow-voltage curve corresponding voltage
Value determines the collection voltage；
Calibration gas output flow-the voltage curve are as follows: when the flow for the gas for maintaining the sampling pump to collect is constant,
Export the relation curve between the flow of the calibration gas and the voltage of the input sampling pump；
S22, Xiang Suoshu sampling pump input the collection voltage.
Further, the detection method further includes step S0: exporting the calibration gas of different flow, is collected with sampling pump
Partial collimation gas, by adjusting the flow perseverance for the calibrating gas that the voltage for inputting the sampling pump maintains the sampling pump to collect
It is fixed, obtain calibrating gas output flow-voltage curve.
The present invention is carried out by the way that sampling pump is arranged in exhaled gas detection system, and to the collection voltage of input sample pump
It automatically controls, it is constant by adjusting the flow for collecting the exhaled gas that voltage maintains sampling pump to collect, so as to avoid because of breathing
Exhaled gas flow fluctuation in the process is influenced caused by testing result, improves the accuracy to exhaled gas detection；Meanwhile
The present invention determines dynamic electric voltage by the data on flows that calibration gas output flow-voltage curve and first flow sensor acquire,
And real-time control is carried out to voltage is collected, operating procedure is simple, and the time detected to exhaled gas is short.
Detailed description of the invention
Fig. 1 is the structure chart of detection system in first embodiment of the invention.
Fig. 2 is the structure chart of detection system in second embodiment of the invention.
Fig. 3 is the structure chart of detection system in third embodiment of the invention.
Fig. 4 is the flow diagram of detection method in fourth embodiment of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with drawings and the embodiments,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
With reference to Fig. 1, first embodiment of the invention provides a kind of exhaled gas detection system, comprising:
Exhaust tube 110, including collecting terminal 111 and outlet side 112；The collecting terminal 111 is used to collect the exhalation of tester
Gas, the outlet side 112 are connected to outside；
First flow sensor 120, for acquiring the data on flows of exhaled gas in exhaust tube 110；
Sampling pump 130 flows through the exhaled gas of exhaust tube 110 for collection part；
Gas sensor 140 130 is connect with described using pump, and the exhaled gas that the sampling pump 130 is collected into
Row detection；
Processor 150 passes through circuit connection with the first flow sensor 120 and sampling pump 130；
Storage medium 160 stores a plurality of instruction in the storage medium 160, and described instruction is held by the processor 150
So that the processor 150 is received the first flow sensor 120 collected data on flows when row, and controls and adopted described in input
The collection voltage of sample pump 130.
Detection system provided in this embodiment when in use, exhale from collecting terminal 110 into exhaust tube 100 by the mouth of subject
Gas, first flow sensor 120 collect the data on flows for flowing through the exhaled gas of exhaust tube 110；Sampling pump 130 and exhaust tube
It is connected between 110 by pipeline, is collected into the exhaled gas that part flows through exhaust tube 110；Gas sensor 140 is to sampling pump
130 exhaled gas being collected into are detected, it is hereby achieved that the information of exhaled gas.
Further, the first flow sensor 120 includes but is not limited to pressure sensor, flow sensor.When
It is pressure by the data on flows that first flow sensor 120 detects when one flow sensor 120 is pressure sensor；When
It is flow velocity by the data on flows that first flow sensor 120 detects when first flow sensor 120 is flow sensor.
Further, the gas sensor include but is not limited to semiconductor gas sensor, electrochemical gas sensor,
Catalytic combustion method gas sensor, thermal conductivity gas sensor, infrared gas sensor, solid-state electrolyte gas sensor.
In the use process of detection system, the type of gas sensor can be selected according to the detection demand to exhaled gas.
The detection system of the present embodiment, processor 150 is by executing the instruction being stored in storage medium 160, to input
The collection voltage of the sampling pump 130 carries out automatically controlling, and then controls the flow for the exhaled gas that sampling pump 130 is collected into,
When the flow for the exhaled gas that sampling pump 130 is collected into remains constant, it can be improved gas sensor 140 and detect exhaled gas
The accuracy of information.
Further, calibration gas output flow-voltage curve, described instruction are also stored in the storage medium 160
It is exported according to the collected data on flows of the first flow sensor 120 in calibration gas when being executed by the processor 150
Corresponding voltage value determines collection voltage in flow-voltage curve.
Specifically, the calibration gas output flow-voltage curve are as follows: the calibration gas for maintaining the sampling pump to collect
When flow is constant, the relation curve between the flow of the calibration gas and the voltage of the input sampling pump is exported.
Since the voltage swing of input sample pump directly affects the gas flow that sampling pump is collected into, pass through calibration
Gas outflow amount-voltage curve and by the collected data on flows of first flow sensor 120, can determine collection electricity
Pressure.The collection voltage for inputting the sampling pump 130 is dynamically controlled by processor 150, thus in the detection to exhaled gas
The collected gas flow rate constant of sampling pump 130 can be maintained in journey, and then improves the standard that detection system detects exhaled gas
True property；In addition, the detection system of this programme may be implemented to automatically control to voltage is collected, detection time is short.
For calibration gas output flow-voltage curve acquisition time, the present invention has no specifically limited, can be use
The exhaust tube and sampling pump of same size obtain calibration gas output flow-voltage curve, then in the identical rule of batch production
The detection system of lattice uses same calibration gas output flow-voltage curve.It is also possible to individually obtain the detection system used
Calibration gas output flow-voltage curve.
For the calibration gas output flow-voltage curve for individually obtaining the detection system used, as shown in Fig. 2, this hair
Bright to propose second embodiment, compared with first embodiment, the detection system of the present embodiment further includes calibration unit, the calibration
Unit includes calibration gas source 271 and second flow sensor 272；The calibration gas source 271 can be from collection terminal 211 to exhaust tube
The calibration gas of output different flow in 210；The second flow sensor 272 is collected into for acquiring the sampling pump 230
Calibration gas flow.
The detection system of the present embodiment in use, first passes through calibration unit and obtains calibration gas output flow-electricity
It buckles line.Specifically, the calibration gas of different flow is exported into exhaust tube 210 from collection terminal 211 using calibration gas source 271,
Remain constant by adjusting the flow that the voltage for inputting the sampling pump 230 detects second flow sensor 272, so as to
To obtain calibration gas output flow-voltage curve.
Further, the calibration gas source 271, second flow sensor 272 are connected by circuit and the processor 250
It connects, the processor 250 can automatically control the flow for the calibration gas that the calibration gas source 271 exports；It can also connect simultaneously
The collected flow of the second flow sensor 272 is received, and automatically obtains calibration gas output flow-voltage curve.
Further, the calibration unit of the present embodiment is detachable structure.The detection system of this programme is obtaining calibration gas
After body output flow-voltage curve, calibration unit can be removed from the detection system, this programme simplifies detection system
Operating procedure.
The present invention can also calibrate gas source and second flow sensor using the control of the independent end calibration PC, as shown in figure 3,
Third embodiment of the invention provides a kind of exhaled gas detection system, compared with second embodiment, the calibration list of the present embodiment
Member further includes the calibration end PC 373；The end calibration PC 373 by circuit respectively with processor 350, calibration gas source 371, second
Quantity sensor 372 connects.
The present embodiment can control the flow for the calibration gas that the calibration gas source 271 exports by calibrating the end PC；Pass through
Processor control inputs the voltage of the sampling pump 330；It is collected that the second flow sensor 272 can also be received simultaneously
Data on flows, and automatically obtain calibration gas output flow-voltage curve.Compared with second embodiment, the present embodiment is using only
The vertical end calibration PC controls calibration unit, no longer needs to the instruction of additional designs control calibration unit on storage medium, simplifies place
The process that reason device executes instruction.
Fourth embodiment of the invention provides a kind of detection method of exhaled gas detection system, as shown in figure 4, include with
Lower step:
S1, the data on flows that exhaled gas is acquired by the first flow sensor；
S2, the collection voltage that the sampling pump is inputted according to data on flows control；
S3, it is detected by the exhaled gas that the gas sensor is collected into the sampling pump.
This programme is by adjusting voltage is collected, and the exhaled gas flow that sampling pump can be made to collect is constant, so that right
The detection of exhaled gas by exhaled gas flow influence of fluctuations, does not improve the accuracy of detection.
Further, the step S2 the following steps are included:
S21, according to the data on flows acquired in step S1 in calibration gas output flow-voltage curve corresponding voltage
Value determines the collection voltage；
Calibration gas output flow-the voltage curve are as follows: when the flow for the gas for maintaining the sampling pump to collect is constant,
Export the relation curve between the flow of the calibration gas and the voltage of the input sampling pump；
S22, Xiang Suoshu sampling pump input the collection voltage.
This programme is according to calibration gas output flow-voltage curve and by the collected flow number of first flow sensor
According to can determine collection voltage；Collecting voltage by control can maintain the flow of the collected exhaled gas of sampling pump 130 permanent
It is fixed, so that being improved not by exhaled gas flow influence of fluctuations in respiratory to expiratory air physical examination to the detection of exhaled gas
The accuracy of survey.
In an alternative em bodiment, the detection method further includes step S0: the calibration gas of different flow is exported, with adopting
Sample pumps collection part calibration gas, the calibrating gas for maintaining the sampling pump to collect by adjusting the voltage for inputting the sampling pump
Flow it is constant, obtain calibrating gas output flow-voltage curve.
The foregoing is merely better embodiments of the invention, are not intended to limit the invention, all of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within spirit and principle.
Claims (5)
1. a kind of exhaled gas detection system characterized by comprising
First flow sensor, for acquiring the data on flows of exhaled gas；
Sampling pump is used for collection part exhaled gas；
Gas sensor is connect with the sampling pump, and the exhaled gas being collected into the sampling pump detects；
Processor passes through circuit connection with the first flow sensor and the sampling pump；
Storage medium stores a plurality of instruction in the storage medium, and described instruction makes described when being executed by the processor
It manages device and receives the collected data on flows of first flow sensor, and control and input the collection voltage of the sampling pump and make to adopt
The flow for the exhaled gas that sample pump is collected into remains constant；
Calibration unit, the calibration unit include calibration gas source and second flow sensor, and the calibration gas source is for exporting not
With the calibration gas of flow, the second flow sensor is used to acquire the flow for the calibration gas that the sampling pump is collected into；
The end PC is calibrated, the end calibration PC is connect with the processor, calibration gas source and second flow sensor respectively, described
The calibration end PC is used to control the flow of the calibration gas of the calibration gas source output, by adopting described in processor control input
The voltage of sample pump, and receive the data on flows of the second flow sensor acquisition.
2. exhaled gas detection system according to claim 1, which is characterized in that the first flow sensor is pressure
Sensor or flow sensor.
3. exhaled gas detection system according to claim 1, which is characterized in that the detection system further includes exhaling
Pipe, the first flow sensor are set in the exhaust tube；The sampling pump is flowed through for collection part from the exhaust tube
Exhaled gas.
4. exhaled gas detection system according to claim 1, which is characterized in that the gas sensor is semiconductor gas
Body sensor, electrochemical gas sensor, catalytic combustion method gas sensor, thermal conductivity gas sensor, infrared gas pass
Sensor or solid-state electrolyte gas sensor.
5. a kind of detection method of exhaled gas detection system according to claim 1, which is characterized in that including following step
It is rapid:
S0, the calibration gas for exporting different flow are adopted with the sampling pump collection part calibration gas by adjusting described in input
The flow for the calibrating gas that the voltage of sample pump maintains the sampling pump to collect is constant, and it is bent to obtain calibrating gas output flow-voltage
Line；
S1, the data on flows that exhaled gas is acquired by the first flow sensor；
S21, according to the data on flows acquired in step S1, corresponding voltage value is true in calibration gas output flow-voltage curve
The fixed collection voltage；
S22, Xiang Suoshu sampling pump input the collection voltage, and the flow for the exhaled gas for being collected into the sampling pump is constant；
S3, it is detected by the exhaled gas that the gas sensor is collected into the sampling pump.
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| CN112697976B (en) * | 2020-12-18 | 2022-11-29 | 汉威科技集团股份有限公司 | Gas circuit flow real-time dynamic adjusting method, system and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203465233U (en) * | 2013-09-27 | 2014-03-05 | 无锡市尚沃医疗电子股份有限公司 | Handheld expiration analyzer |
| CN103800012A (en) * | 2014-01-13 | 2014-05-21 | 深圳市理邦精密仪器股份有限公司 | Method and device for stabilizing sampling gas flow in respiratory monitoring |
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| JP5067698B2 (en) * | 2008-06-03 | 2012-11-07 | 日本光電工業株式会社 | Flow measurement system and biological information monitor |
| CN104237132B (en) * | 2014-09-03 | 2017-09-22 | 深圳市理邦精密仪器股份有限公司 | The method and device of intelligent school zero monitored for breathing gas |
| CN104784793B (en) * | 2015-04-14 | 2017-10-10 | 深圳市科曼医疗设备有限公司 | The lambda sensor automatic calibrating method of lung ventilator and lung ventilator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203465233U (en) * | 2013-09-27 | 2014-03-05 | 无锡市尚沃医疗电子股份有限公司 | Handheld expiration analyzer |
| CN103800012A (en) * | 2014-01-13 | 2014-05-21 | 深圳市理邦精密仪器股份有限公司 | Method and device for stabilizing sampling gas flow in respiratory monitoring |
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Address after: Longgang District of Shenzhen City, Guangdong province 518116 Longgang Street Community 6 new road bridge Baolong Baolong Industrial Park building B building 1-3 floor Patentee after: Shenzhen meimeimeichuangyi Medical Technology Co., Ltd Address before: Longgang District of Shenzhen City, Guangdong province 518116 Longgang Street Community 6 new road bridge Baolong Baolong Industrial Park building B building 1-3 floor Patentee before: MEHOW INNOVATIVE Ltd. |
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