CN112229805A - Medical gas detection system and method - Google Patents
Medical gas detection system and method Download PDFInfo
- Publication number
- CN112229805A CN112229805A CN202011056021.7A CN202011056021A CN112229805A CN 112229805 A CN112229805 A CN 112229805A CN 202011056021 A CN202011056021 A CN 202011056021A CN 112229805 A CN112229805 A CN 112229805A
- Authority
- CN
- China
- Prior art keywords
- gas
- detection
- laser
- detected
- optical absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The embodiment of the application discloses a system and a method for detecting medical gas. The system comprises: the gas leading-in device is used for leading in gas to be measured; the gas detection device is used for carrying out laser spectrum detection on the gas to be detected; the gas collecting and discharging device is used for collecting or discharging the gas of the gas detection device; the data processing device is used for determining parameters of the detection target gas according to the spectrum signals obtained by the laser spectrum detection; and the control device is used for controlling each device in the detection process. By executing the scheme provided by the application, the scheme provided by the application can realize more efficient and accurate detection of specific components in the gas discharged by a human body without purifying and concentrating the gas by introducing a laser detection technology, thereby providing a basis for medical diagnosis; moreover, compared with other detection technologies, the technology of the scheme is more stable, the anti-interference capability is strong, and the detection result cannot be interfered due to different external environments.
Description
Technical Field
The embodiment of the application relates to the technical field of medical detection, in particular to a medical gas detection system and method.
Background
With the progress of human society and the development of science and technology, published research in the fields of medicine and biology shows that when the metabolism of human tissue cells changes, a trace amount of Volatile Organic Compounds (VOCs) can appear in respiratory gas, and the pathological changes of the tissue cells of different body parts have different VOC expression profiles, so that the detection of gas components in the respiratory gas of a human body can form the VOC expression profiles containing different gas components, and the detection can be used for judging whether the tissue cells of different body parts of the human body are pathological changes, thereby having important significance in monitoring the health state of the human body and diagnosing diseases.
The existing means for detecting specific trace components in human body exhaust mainly adopts a chromatographic technology in a chemical process, and the means has obvious disadvantages in detection, high actual use cost and is not beneficial to large-scale popularization. Each detection operation step in the chromatographic detection process is complicated, and the repeatability of the test result on trace gas is poor; meanwhile, the detection technology generally needs to concentrate and purify the gas containing specific trace components before testing, and corresponding equipment needs to be additionally matched, so that the overall detection steps and cost are increased.
Disclosure of Invention
The embodiment of the application provides a system and a method for detecting medical gas, and by introducing a laser detection technology, specific components in gas discharged by a human body can be detected more efficiently and accurately, so that a basis is provided for medical diagnosis; moreover, compared with other detection technologies, the technology of the scheme is more stable, the anti-interference capability is strong, and the detection result cannot be interfered due to different external environments.
In a first aspect, an embodiment of the present application provides a medical gas detection system, including:
the gas leading-in device is used for leading in gas to be measured;
the gas detection device is connected with the gas leading-in device through a gas guide tube and is used for carrying out laser spectrum detection on the gas to be detected;
the gas collecting and discharging device is connected with the gas detection device through a gas guide tube and is used for collecting or discharging gas of the gas detection device;
the data processing device is electrically connected with the gas detection device and used for receiving a spectrum signal obtained by performing laser spectrum detection on the gas to be detected so as to determine the parameters of the target gas to be detected in the gas to be detected;
and the control device is electrically connected with the gas leading-in device, the gas detection device, the gas collecting and discharging device and the data processing device and is used for controlling each device in the detection process of the gas to be detected.
Further, the gas introduction device includes:
the gas nozzle is used for being connected with a bearing device of gas to be detected;
and the air suction pump is used for introducing the gas to be detected into the gas detection device.
Further, the gas detection apparatus includes:
and the optical absorption cell is used for performing laser spectrum absorption detection on the gas to be detected.
Further, the gas detection apparatus further includes:
the laser emitter is used for emitting laser with a preset wave band to the gas to be measured in the optical absorption cell;
the laser detector is used for detecting a spectral intensity signal of the laser absorbed by the gas to be detected;
correspondingly, the data processing device is specifically configured to record an intensity signal of laser light of a preset waveband emitted by the laser emitter, and receive the intensity signal of the laser light detected by the laser detector, so as to determine a parameter of a target gas to be detected in the gas to be detected.
Further, the control device is specifically configured to:
and controlling a preset wave band of laser emitted by a laser emitter in the gas detection device.
Further, a pressure intensity detection unit is arranged in the optical absorption cell; the air inlet end and the air outlet end of the optical absorption cell are respectively provided with a controllable valve;
the control device is specifically configured to: controlling a controllable valve at the air outlet end of the optical absorption cell to be closed, and controlling a controllable valve at the air inlet end of the optical absorption cell to be opened;
the control device is further configured to: and controlling the gas introduction device to introduce the gas to be detected until the pressure detection unit detects that the target pressure is reached, stopping introducing the gas to be detected, and controlling the controllable valve at the gas inlet end to be closed.
Further, the gas detection apparatus includes: the device comprises at least two optical absorption cells, wherein a pressure intensity detection unit is arranged in each optical absorption cell; the air inlet end and the air outlet end of each optical absorption cell are respectively provided with a controllable valve;
the control device is specifically configured to: and determining that the same preset wave band is adopted by the laser emitted by the laser emitter in the gas detection device so as to perform parameter detection on the same detection target gas for the gas to be detected.
Further, the gas detection apparatus includes: the device comprises at least two optical absorption cells, wherein a pressure intensity detection unit is arranged in each optical absorption cell; the air inlet end and the air outlet end of each optical absorption cell are respectively provided with a controllable valve;
the control device is specifically configured to: determining that at least two preset wave bands are adopted by laser emitted by a laser emitter in the gas detection device so as to perform parameter detection on at least two detection target gases for the gas to be detected.
In a second aspect, an embodiment of the present application provides a method for detecting a medical gas, which can be applied to the above system for detecting a medical gas, and the method includes:
determining a detection target gas in the gas to be detected;
determining a preset wave band of the emitted laser according to a preset relation between a predetermined detection target gas and a laser wave band;
and determining parameters of the detection target gas in the gas to be detected according to the received intensity signal of the laser and the emitted intensity signal of the laser.
Further, the parameter of the detection target gas in the gas to be detected includes the concentration of the detection target gas in the gas to be detected.
According to the detection system and method for the medical gas, the gas to be detected is introduced through the gas introduction device, the gas detection device performs laser spectrum detection, the gas collection and discharge device performs collection or discharge of the gas detection device, the data processing device receives a spectrum signal obtained by performing laser spectrum detection on the gas to be detected so as to determine parameters of a detection target gas in the gas to be detected, and the control device performs control on each device in the detection process of the gas to be detected. According to the technical scheme, the laser detection technology is introduced, purification and concentration treatment on gas are not needed, and specific components in gas discharged by a human body can be detected more efficiently and accurately, so that the aim of providing basis for medical diagnosis is fulfilled; moreover, compared with other detection technologies, the technology of the scheme is more stable, the anti-interference capability is strong, and the detection result cannot be interfered due to different external environments.
Drawings
Fig. 1 is a schematic structural diagram of a medical gas detection system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the working principle of an optical absorption cell provided in the second embodiment of the present application;
FIG. 3 is a schematic view of the working principle of controlling the gas inlet and outlet provided by the third embodiment of the present application;
fig. 4 is a flow chart of medical gas detection according to the fourth embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a schematic structural diagram of a medical gas detection system according to an embodiment of the present application, which is applicable to a case where specific components in human body exhaust gas are detected, so as to provide a basis for medical diagnosis. For example, if hydrogen is a result of fermentation of carbohydrates, dietary fibers, and the like remaining in the large intestine, hydrogen can be regarded as a sign of human dyspepsia; acetone is produced by the metabolism of fatty acids in the absence of glucose in blood, and can be used as an index for diagnosing diseases such as diabetes and obesity. The medical gas detection system can execute the medical gas detection method provided by the embodiment of the application.
Specifically, as shown in fig. 1, the medical gas detection system includes:
a gas introduction device 1 for introducing a gas to be measured;
the gas detection device 2 is connected with the gas leading-in device 1 through a gas guide tube and is used for carrying out laser spectrum detection on gas to be detected;
the gas collecting and discharging device 3 is connected with the gas detection device 2 through a gas guide tube and is used for collecting or discharging gas of the gas detection device 2;
the data processing device 4 is electrically connected with the gas detection device 2 and is used for receiving a spectrum signal obtained by performing laser spectrum detection on the gas to be detected so as to determine the parameters of the target gas to be detected in the gas to be detected;
and a control device 5 electrically connected to the gas introduction device 1, the gas detection device 2, the gas exhaust/collection device 3, and the data processing device 4, for controlling the devices in the detection process of the gas to be measured.
In this embodiment, the gas to be measured may be gas collected in the air bag or the gas cylinder and discharged when the patient to be measured breathes, or may be gas directly blown into the gas introduction device 1 by the patient through the gas guide tube.
The gas guide pipe is used for guiding gas at one position to a pipeline at another position, and can be a metal gas guide pipe or a nonmetal gas guide pipe, such as a stainless steel gas guide pipe or a rubber gas guide pipe and the like, and special setting can be carried out on pressure bearing capacity, corrosion resistance and the like at the position without limitation.
On the basis of the above technical solution, optionally, the gas introducing device 1 includes at least one combination of a gas nozzle and a suction pump. The gas nozzle is used for being connected with a bearing device of gas to be measured, and can be a rubber gas nozzle, a metal gas nozzle and the like; and a getter pump for introducing the gas to be measured into the gas detection device 2. The getter pump may perform pumping operation or stop operation under the control of the control signal, and a negative pressure may be formed at a suction port of the pump to allow gas to be sucked into the gas detection device 2 under the action of the gas pressure. Preferably, the air suction pump is a micro air suction pump, which does not need lubricating oil and vacuum pump oil like a large vacuum pump, does not pollute working media, and has small volume and low noise.
An air bag or an air bottle filled with gas to be detected can be connected to the air faucet, and when detection is started, the gas to be detected is guided into the gas detection device 2 through the air faucet and the air suction pump to be subjected to laser spectrum absorption detection.
The principle of laser spectrum detection is to measure the absorption spectrum of the gas to be detected, and because the specific absorption peak frequencies of different gas molecules to light are different, and the absorption frequency width of the gas molecules to light is far greater than the frequency width of the laser, the type and concentration of trace gas can be determined by calculating the degree of absorption of the laser with specific wavelength. Compared with the traditional detection means, the laser spectrum detection method has the advantages of simplicity and convenience in operation, high stability, capability of carrying out real-time detection, capability of omitting the treatment process of concentration and purification of gas, high analysis sensitivity, high test efficiency and the like.
In this embodiment, optionally, the gas detection device 2 includes at least one optical absorption cell, and is configured to perform laser spectral absorption detection on the gas to be detected. Alternatively, when there are a plurality of optical absorption cells, the volume of each optical absorption cell is fixed. By fixing the volume of the optical absorption cell, the laser absorption degree deviation caused by different volumes in the spectrum detection process can be avoided, so that the accuracy of the detection result is improved.
Optionally, the gas collecting and exhausting device 3 comprises at least one air pump for collecting or exhausting the gas of the gas detecting device 2 to ensure the harmless treatment. The air pump can perform pumping work or stop working under the control of the control signal, and negative pressure can be formed at an air pumping port of the air pump, so that air is pumped out of the air detection device 2 under the action of air pressure. Preferably, the air pump is a miniature air pump, which does not need lubricating oil and vacuum pump oil like a large vacuum pump, does not pollute working media, and has small volume and low noise.
Specifically, the tail pipe can be connected to an air bag or an air bottle to realize tail gas collection, and the air bag or the air bottle is uniformly treated; or the tail pipe can be connected to an exhaust pipeline which meets the medical standard and directly exhausted.
During the detection process, the data processing device 4 collects the gas absorption spectrum signals generated by the gas detection device 2 and processes the signals to obtain the type and concentration of the tested gas.
Optionally, the data processing device 4 may include a phase-locked amplifying module, an analog-to-digital conversion module, and a central processing unit.
The phase-locked amplification module can be arranged on the surface of an optical absorption cell of the gas detection device 2 and connected with a detector, and specifically can be respectively connected with each unit of a detector array; the analog-to-digital conversion module is connected with the phase-locked amplification module; and the central processing unit is connected with the analog-to-digital conversion module.
Specifically, for each unit of the detector array, each detector unit is connected with the central processing unit after being sequentially connected with the phase-locked amplifying and analog-to-digital conversion module. The phase-locked amplification module is used for amplifying and filtering output voltage signals of all units of the detector array, the analog-to-digital conversion module is used for converting the amplified and filtered signals into digital signals, and the central processing unit processes the digital signals so as to identify gas components and judge the concentration of the components contained in the gas to be detected.
In this embodiment, the control device 5 may adopt a microprocessor or a single chip microcomputer or other common microprocessor chip to control the gas introducing device 1, the gas detecting device 2, the gas collecting and discharging device 3 and the data processing device 4, and interact with human through an operation interface, and the operation process may be manually set or may automatically run through program logic.
According to the technical scheme, in a medical gas detection system, gas to be detected is guided in through a gas guide-in device, a gas detection device carries out laser spectrum detection, a gas collection and discharge device collects or discharges gas of the gas detection device, a data processing device receives a spectrum signal obtained by laser spectrum detection of the gas to be detected so as to determine parameters of a detection target gas in the gas to be detected, and a control device controls the devices in the detection process of the gas to be detected.
Example two
Fig. 2 is a schematic diagram of the working principle of the optical absorption cell provided in the second embodiment of the present invention, and further optimization is performed on the basis of the second embodiment, specifically optimization is performed as follows:
according to the system in the above embodiment, the gas detection apparatus further includes:
the laser emitter is used for emitting laser with a preset wave band to the gas to be measured in the optical absorption cell;
the laser detector is used for detecting a spectral intensity signal of the laser absorbed by the gas to be detected;
correspondingly, the data processing device 4 is specifically configured to record an intensity signal of laser light of a preset waveband emitted by the laser emitter, and receive the intensity signal of the laser light detected by the laser detector, so as to determine a parameter of the target gas to be detected in the gas to be detected.
The control device 5 is specifically configured to:
and controlling a preset wave band of laser emitted by a laser emitter in the gas detection device.
As shown in fig. 2, the gas detection apparatus further includes:
a laser emitter 222 for emitting laser of a preset waveband to the gas to be measured in the optical absorption cell 22;
a laser detector 223 for detecting a spectral intensity signal of the laser absorbed by the gas to be detected;
accordingly, the data processing device 4 is specifically configured to record the intensity signal of the laser light emitted by the laser emitter 222 in the preset wavelength band, and receive the intensity signal of the laser light detected by the laser detector 223, so as to determine the parameter of the target gas to be detected in the gas to be detected.
The control device 5 is specifically configured to control a preset waveband of laser emitted by the laser emitter 222 in the gas detection device.
In this embodiment, the laser emitter 222 is controlled by the control device 5 to control working parameters, such as a switching state, a working current, a working temperature (achieved by controlling the TEC in the laser emitter 222), a working frequency, and the like, and may be a packaged semiconductor DFB laser, a DBR laser, a tunable laser, and the like, or may be an optical fiber connected to a light source from the outside.
Optionally, the laser detector 223 is controlled by the control device 5 to control working parameters, such as a switching state, a working voltage, a working temperature (implemented by controlling the TEC in the detector 223), and the like, the laser detector 223 in each optical absorption cell 22 needs to be configured according to the wavelength of the corresponding laser emitter 222, and the detection range should include all working wavelengths and working powers of the corresponding laser emitters 222, so that a Si detector, an InGaAs detector, an APD, and the like can be selected and used correspondingly. The signals measured by the laser detector 223 are collected by the data processing device 4 and are subjected to subsequent data processing work by the data processing device 4.
The laser detector 223 may be a single device or a plurality of array units. Preferably, each cell of the array comprises: filter elements and corresponding detector chips.
In the optical absorption cell 22, the operating parameters of the corresponding laser detector 223 are configured according to the actually required wavelength of the laser emitter 222. The laser emitter can be controlled to emit the wave band corresponding to the target gas more accurately, and the detected parameters of the target gas are more accurate.
EXAMPLE III
Fig. 3 is a schematic view of the working principle of controlling the gas inlet and outlet according to the third embodiment of the present invention, which is further optimized based on the third embodiment, and a specific description of the gas inlet and outlet control process is given. As shown in fig. 3, the method specifically includes:
the optical absorption cell 22 is provided with a pressure intensity detection unit 221;
the air inlet end and the air outlet end of the optical absorption cell 22 are respectively provided with a controllable valve;
the control device 5 is specifically used for controlling the closing of the controllable valve 23 at the air outlet end of the optical absorption cell 22 and controlling the opening of the controllable valve 21 at the air inlet end of the optical absorption cell 22; and is also used for controlling the gas introducing device 1 to introduce the gas to be measured until the pressure detection unit 221 detects that the target pressure is reached, stopping introducing the gas to be measured, and controlling the gas inlet end controllable valve 21 to be closed.
The target pressure may be a set pressure, optionally, different pressure values may be set for different target gases, and the target pressure may also be set to a fixed value for any target gas.
In the scheme, the pressure detection unit controls the pressure, so that a more accurate detection result can be obtained, and more accurate basic data can be provided for medical analysis.
Firstly, the optical absorption cell 22 can be pumped to a vacuum state through the air suction pump 31 and the air outlet end controllable valve 23, and then the air outlet end controllable valve 23 and the air suction pump 31 are closed in sequence; thirdly, the control device 5 opens the getter pump 12 and the inlet controllable valve 21, the gas in the gas bag or the gas cylinder is pumped into the optical absorption cell 22, when the pressure detection unit 221 detects that the optical absorption cell 22 reaches the set target pressure, the pressure signal is transmitted to the data processing device 4 and then transmitted to the control device 5, and the control device 5 controls to close the inlet controllable valve 21 and the getter pump 12, so that the optical absorption cell 22 is in the sealed state under the target pressure.
In this embodiment, optionally, the gas detection device 2 includes at least two optical absorption cells 22, and a pressure detection unit 221 is disposed in each optical absorption cell 22; the air inlet end and the air outlet end of each optical absorption cell 22 are respectively provided with a controllable valve; the control device 5 is specifically configured to determine that the laser emitted by the laser emitter 222 in the gas detection device 2 adopts the same preset waveband, so as to perform parameter detection on the same detection target gas for the gas to be detected.
By expanding the number of the gas detection devices 2 and configuring the gas detection devices accordingly, multiple groups of gas detection devices 2 can work simultaneously, multiple detections of the same component in a gas sample can be realized, and multiple results can be averaged, so that the result parameters are more accurate.
In this embodiment, optionally, the gas detection device 2 includes at least two optical absorption cells 22, and a pressure detection unit 221 is disposed in each optical absorption cell 22; the air inlet end and the air outlet end of each optical absorption cell 22 are respectively provided with a controllable valve; the control device 5 is specifically configured to determine that laser emitted by the laser emitter 222 in the gas detection device 2 adopts at least two preset wave bands, so as to perform parameter detection on at least two detection target gases for the gas to be detected.
Through the quantity and the corresponding configuration of extension gaseous leading-in device 1 and gas detection device 2, can make multiunit gaseous leading-in device 1 and gas detection device 2 simultaneous workings, realize detecting multiunit gas simultaneously for it is more high-efficient to detect.
In this embodiment, the gas to be measured enters from the gas introducing device 1, flows through the gas detecting device 2, and is collected or discharged by the gas collecting and discharging device 3.
The gas introduction device 1 comprises a combination of at least one gas nozzle 11 and a getter pump 12 for introducing the gas to be measured into the subsequent gas detection device 2. The air nozzle 11 can be a plastic air nozzle or a metal air nozzle; the getter pump 12 can form a negative pressure at the suction port of the pump, so that gas is sucked into the gas detection device 2 by the gas pressure. Preferably, the getter pump 12 is a micro getter pump, unlike a large vacuum pump requiring lubricating oil and vacuum pump oil, which does not pollute the working medium, and has a small volume and low noise.
The gas detection device 2 comprises at least one optical absorption cell 22, each optical absorption cell 22 has a fixed volume, and the two ends except the gas inlet and outlet are in a sealed state and are used for introducing gas to be detected for detection; the front and back air inlet and outlet ends of each optical absorption cell 22 are respectively provided with an air inlet end controllable valve 21 and an air outlet end controllable valve 23, and the valves can be electrically operated.
The gas collecting and discharging device 3 comprises at least one air pump 31 for collecting or discharging the gas of the gas detection device 2 so as to ensure harmless treatment; the air pump 31 can be a miniature air pump, the tail gas collection can be an air bag or an air bottle, and the like, and the tail pipe can be connected with an exhaust pipeline which meets the medical standard by directly exhausting the tail gas.
Preferably, the getter pump 12 of the gas introducing means 1, the inlet side controllable valve 21 and the outlet side controllable valve 23 of the gas detecting means 2, and the getter pump 31 of the gas collecting and discharging means 3 are controlled by signals given by the control means 5, and the necessary mutual locking logic is set by the control means 5 in view of safety.
Optionally, the medical gas detection system may be configured with an interactive interface. The interactive interface is a channel for information exchange between people and the computer, a user inputs information to the computer through the interactive interface and operates the computer, and the computer provides information for the user through the interactive interface for reading, analysis and judgment.
Specifically, taking the detection process of the gas exhausted by respiration of a certain diabetic to be detected as an example, the detection operation flow of the medical gas detection system based on the laser spectrum is described as follows:
firstly, connecting an air bag or an air bottle which collects exhaled air to an air faucet 11;
secondly, an instruction is issued manually or automatically by a program through an interactive interface, the control device 5 starts the air suction pump 31 and the air outlet end controllable valve 23, the optical absorption cell 22 is pumped to a vacuum state, and then the air outlet end controllable valve 23 and the air suction pump 31 are closed in sequence;
and thirdly, issuing an instruction manually or automatically by a program through an interactive interface, starting the air suction pump 12 and the air inlet end controllable valve 21 by the control device 5, pumping the gas in the gas bag or the gas cylinder into the optical absorption cell 22, and closing the air inlet end controllable valve 21 and the air suction pump 12 in sequence when the pressure intensity detection unit 221 detects that the optical absorption cell 22 reaches a corresponding set pressure intensity, wherein the optical absorption cell 22 is in a sealing state under the set pressure intensity state.
Fourthly, instructions are issued manually or automatically through an interactive interface, the control device 5 controls the data processing device 4, the laser emitter 222 and the detector 223 to test the gas for the acetone, and a test result is fed back;
fifthly, after the result is confirmed to be correct and stored, an instruction is issued manually or automatically through a program through an interactive interface, and the control device 5 starts the air suction pump 31 and the air outlet end controllable valve 23 to discharge the gas in the optical absorption cell 22 to the gas collecting and discharging device 3.
According to the technical scheme of the embodiment, the pressure intensity of the optical absorption cell 222 is set through the pressure intensity detection unit 221 and the corresponding control assembly, so that the detection process of the specific gas component to be detected works in the optimal state, and the precision and the stability of laser spectrum absorption detection are improved; utilize controlling means 5 to carry out high-efficient management to the gas that needs to detect, a plurality of gaseous compositions that await measuring in the accessible a plurality of optical absorption cells 22 are simultaneously detected in the gas, also can make single optical absorption cell 22 leading-in gas that awaits measuring in turn in order to detect different gaseous compositions, effectively utilize gas, make trace gas testing process nimble more convenient, improved work efficiency.
Example four
Fig. 4 is a flowchart of a medical gas detection method according to a fourth embodiment of the present invention, which can be executed by the medical gas detection system and can improve detection efficiency.
Specifically, as shown in fig. 4, the method includes:
and S410, determining a detection target gas in the gas to be detected.
The gas to be measured may be a gas discharged from the breath of the patient to be measured, and the target gas may be a gas corresponding to the disease to be measured. Specifically, when a patient to be tested is preliminarily diagnosed as having diabetes and acetone is produced by metabolism of fatty acids in the case where the blood is deficient in glucose, it is possible to determine acetone as an index for diagnosing diabetes, that is, a target gas.
And S420, determining a preset wave band for emitting laser according to a preset relation between the preset detection target gas and the laser wave band.
Different gas molecules have different specific absorption peak frequencies to light, and the laser wave bands set when different target gases are detected are different. Preferably, the preset relationship between the gas and the laser wave band may be preset and stored in a preset relationship library. After the target gas is determined, the corresponding laser wave band can be automatically matched from the preset relation library, or the selected laser wave band can be manually set directly through an interactive interface after the laser wave band is determined by a worker according to the target gas.
And S430, determining parameters of the target gas to be detected in the gas to be detected according to the intensity signal of the received laser and the intensity signal of the emitted laser.
The parameter of the detection target gas in the gas to be detected includes the content or concentration of the detection target gas in the gas to be detected.
Because the specific absorption peak frequencies of different gas molecules to light are different and the absorption frequency width of the gas molecules to light is far larger than the frequency width of laser, the species and the concentration of trace gas can be determined by calculating the absorption degree of the laser with specific wavelength.
By introducing the laser detection technology, the method can more efficiently and accurately detect the specific components in the gas discharged by the human body, thereby providing a basis for medical diagnosis; moreover, compared with other detection technologies, the technology of the scheme is more stable, the anti-interference capability is strong, and the detection result cannot be interfered due to different external environments.
The gas detection method can be executed by the medical gas detection system provided by any embodiment of the application, and has corresponding execution processes and beneficial effects.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (10)
1. A medical gas detection system, comprising:
the gas leading-in device is used for leading in gas to be measured;
the gas detection device is connected with the gas leading-in device through a gas guide tube and is used for carrying out laser spectrum detection on the gas to be detected;
the gas collecting and discharging device is connected with the gas detection device through a gas guide tube and is used for collecting or discharging gas of the gas detection device;
the data processing device is electrically connected with the gas detection device and used for receiving a spectrum signal obtained by performing laser spectrum detection on the gas to be detected so as to determine the parameters of the target gas to be detected in the gas to be detected;
and the control device is electrically connected with the gas leading-in device, the gas detection device, the gas collecting and discharging device and the data processing device and is used for controlling each device in the detection process of the gas to be detected.
2. The system of claim 1, wherein the gas introduction device comprises:
the gas nozzle is used for being connected with a bearing device of gas to be detected;
and the air suction pump is used for introducing the gas to be detected into the gas detection device.
3. The system of claim 1, wherein the gas detection device comprises:
and the optical absorption cell is used for performing laser spectrum absorption detection on the gas to be detected.
4. The system of claim 3, wherein the gas detection device further comprises:
the laser emitter is used for emitting laser with a preset wave band to the gas to be measured in the optical absorption cell;
the laser detector is used for detecting a spectral intensity signal of the laser absorbed by the gas to be detected;
correspondingly, the data processing device is specifically configured to record an intensity signal of laser light of a preset waveband emitted by the laser emitter, and receive the intensity signal of the laser light detected by the laser detector, so as to determine a parameter of a target gas to be detected in the gas to be detected.
5. The system according to claim 4, characterized in that said control means are particularly adapted to:
and controlling a preset wave band of laser emitted by a laser emitter in the gas detection device.
6. The system according to claim 3, wherein a pressure detection unit is arranged in the optical absorption cell; the air inlet end and the air outlet end of the optical absorption cell are respectively provided with a controllable valve;
the control device is specifically configured to: controlling a controllable valve at the air outlet end of the optical absorption cell to be closed, and controlling a controllable valve at the air inlet end of the optical absorption cell to be opened;
the control device is further configured to: and controlling the gas introduction device to introduce the gas to be detected until the pressure detection unit detects that the target pressure is reached, stopping introducing the gas to be detected, and controlling the controllable valve at the gas inlet end to be closed.
7. The system of claim 3, wherein the gas detection device comprises: the device comprises at least two optical absorption cells, wherein a pressure intensity detection unit is arranged in each optical absorption cell; the air inlet end and the air outlet end of each optical absorption cell are respectively provided with a controllable valve;
the control device is specifically configured to: and determining that the same preset wave band is adopted by the laser emitted by the laser emitter in the gas detection device so as to perform parameter detection on the same detection target gas for the gas to be detected.
8. The system of claim 3, wherein the gas detection device comprises: the device comprises at least two optical absorption cells, wherein a pressure intensity detection unit is arranged in each optical absorption cell; the air inlet end and the air outlet end of each optical absorption cell are respectively provided with a controllable valve;
the control device is specifically configured to: determining that at least two preset wave bands are adopted by laser emitted by a laser emitter in the gas detection device so as to perform parameter detection on at least two detection target gases for the gas to be detected.
9. A method for detecting a medical gas based on the medical gas detection system according to any one of claims 1 to 8, the method comprising:
determining a detection target gas in the gas to be detected;
determining a preset wave band of the emitted laser according to a preset relation between a predetermined detection target gas and a laser wave band;
and determining parameters of the detection target gas in the gas to be detected according to the received intensity signal of the laser and the emitted intensity signal of the laser.
10. The method of claim 9, wherein the parameter of the detection target gas in the test gas comprises a concentration of the detection target gas in the test gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011056021.7A CN112229805A (en) | 2020-09-29 | 2020-09-29 | Medical gas detection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011056021.7A CN112229805A (en) | 2020-09-29 | 2020-09-29 | Medical gas detection system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112229805A true CN112229805A (en) | 2021-01-15 |
Family
ID=74120475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011056021.7A Pending CN112229805A (en) | 2020-09-29 | 2020-09-29 | Medical gas detection system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112229805A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698850A (en) * | 2016-01-28 | 2016-06-22 | 武汉大学 | An experiment system and an experiment method used for studying dielectric barrier discharge processing of SF[6] gases |
| CN106442404A (en) * | 2016-09-28 | 2017-02-22 | 曲阜师范大学 | Real-time on-line multi-component monitoring optical system for stable gas isotopes |
| CN106802288A (en) * | 2017-03-22 | 2017-06-06 | 河北大学 | Gas-detecting device and method based on tunable laser and super continuous spectrums laser |
| CN106872402A (en) * | 2017-03-22 | 2017-06-20 | 河北大学 | Gas-detecting device and method based on super continuous spectrums laser |
| CN110927100A (en) * | 2019-11-26 | 2020-03-27 | 宁波海尔欣光电科技有限公司 | System for measuring gas flux and method of measuring gas flux |
| CN110954503A (en) * | 2019-12-18 | 2020-04-03 | 中国科学院合肥物质科学研究院 | In-situ online detection device for laser spectrum of seawater dissolved gas |
| CN210347454U (en) * | 2019-07-19 | 2020-04-17 | 宁波海尔欣光电科技有限公司 | Gas concentration analyzer |
| CN211347925U (en) * | 2019-12-31 | 2020-08-25 | 厦门大学 | Gas concentration measuring device |
| CN111707634A (en) * | 2020-06-30 | 2020-09-25 | 华南理工大学 | Multi-channel gas concentration detection system and method based on mid-infrared absorption spectrum |
-
2020
- 2020-09-29 CN CN202011056021.7A patent/CN112229805A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698850A (en) * | 2016-01-28 | 2016-06-22 | 武汉大学 | An experiment system and an experiment method used for studying dielectric barrier discharge processing of SF[6] gases |
| CN106442404A (en) * | 2016-09-28 | 2017-02-22 | 曲阜师范大学 | Real-time on-line multi-component monitoring optical system for stable gas isotopes |
| CN106802288A (en) * | 2017-03-22 | 2017-06-06 | 河北大学 | Gas-detecting device and method based on tunable laser and super continuous spectrums laser |
| CN106872402A (en) * | 2017-03-22 | 2017-06-20 | 河北大学 | Gas-detecting device and method based on super continuous spectrums laser |
| CN210347454U (en) * | 2019-07-19 | 2020-04-17 | 宁波海尔欣光电科技有限公司 | Gas concentration analyzer |
| CN110927100A (en) * | 2019-11-26 | 2020-03-27 | 宁波海尔欣光电科技有限公司 | System for measuring gas flux and method of measuring gas flux |
| CN110954503A (en) * | 2019-12-18 | 2020-04-03 | 中国科学院合肥物质科学研究院 | In-situ online detection device for laser spectrum of seawater dissolved gas |
| CN211347925U (en) * | 2019-12-31 | 2020-08-25 | 厦门大学 | Gas concentration measuring device |
| CN111707634A (en) * | 2020-06-30 | 2020-09-25 | 华南理工大学 | Multi-channel gas concentration detection system and method based on mid-infrared absorption spectrum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070229818A1 (en) | Apparatus and method for monitoring breath acetone and diabetic diagnostics | |
| CN201263678Y (en) | Novel device for analyzing infrared end-tidal carbon dioxide concentration | |
| CN111638282A (en) | Portable detection equipment and detection method for rapid screening of liver diseases | |
| JP6781762B2 (en) | Red blood cell lifespan measurement method and equipment | |
| CN112229805A (en) | Medical gas detection system and method | |
| CN114113283A (en) | Expired gas collection system and mass spectrometry device | |
| CN104964944B (en) | A kind of two-way infrared spectrum analysis system and its detection method | |
| CN1085662A (en) | Fluid analysis | |
| CN109752344A (en) | A kind of portable non-methane total hydrocarbons concentration detector and detection method | |
| CN109374913B (en) | Liquid path system device and control method | |
| JP4452783B2 (en) | Cirrhosis test method and apparatus using breath analysis apparatus | |
| CN113588579B (en) | Blood ion concentration detection device and method, and calcium ion concentration detection method | |
| CN109856381A (en) | A kind of division of endocrinology's diabetes fast testing apparatus | |
| CN204903382U (en) | Gaseous molecular concentration's of human expiration sign nature paramagnetic of on -line measuring device | |
| CN113189023A (en) | Method and system for measuring trace components of expired air by spectroscopy | |
| CN216013139U (en) | CO2 breath isotope detector | |
| CN220084705U (en) | High-sensitivity alcohol content detection device | |
| CN114910437A (en) | Measurement method and system for eliminating interference of CO2 in gas sample on CO concentration measurement | |
| CN114487190B (en) | Medical human body exhale VOC gas detection device based on light PID sensor | |
| CN206114517U (en) | Infrared oil smoke monitoring system | |
| CN216847477U (en) | Raman device for gas analysis | |
| CN212932390U (en) | Air chamber of ultraviolet fluorescence analyzer | |
| CN217878896U (en) | On-line trace monitoring device | |
| KR102540284B1 (en) | Optic breath analysis apparatus | |
| CN113984691B (en) | Waste gas and waste liquid centralized collection and discharge module for gas-phase molecular absorption spectrometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |