Spherical suspended gas detector and its detection method

Abstract

This invention relates to a spherical suspended gas detector, comprising: an elliptical base, a housing, and a top cover. The housing is hollow and fixedly mounted on the base, and the top cover is fitted over the top of the housing. A human-machine interface unit is mounted on the housing, and a spherical absorption cell is disposed inside the housing. A suspension unit is disposed inside the spherical absorption cell, and a sample introduction unit is disposed at the bottom of the spherical absorption cell. Optical path detection units are disposed on both sides of the spherical absorption cell, and a signal acquisition and processing unit and a voltage regulator unit are disposed side-by-side on the left side of the spherical absorption cell. This invention also relates to a corresponding detection method. The spherical suspended gas detector and its detection method of this invention have advantages such as high accuracy, short detection time, and low cost, which can greatly improve medical diagnostic efficiency and have significant research and development value and considerable development potential.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology for medical devices, and more particularly to the field of trace gas optical detection technology, specifically to a spherical suspended gas detector and its detection method. Background Technology

[0002] The traditional Chinese medicine diagnostic method of "observation, auscultation, inquiry, and palpation"—diagnosing diseases by judging the smell of breath—has a long history of research. Modern medicine has also proven that volatile organic compounds (VOCs) expelled from the human body are closely related to human metabolism. Statistics show that the gases expelled by the human body contain trace amounts of more than 250 kinds of VOCs, among which the concentrations of hydrogen sulfide, methanethiol, dimethyl sulfide, acetone, isoprene, ammonia, methane, and ethane contain a wealth of physiological, pathological, and cancer information. Achieving rapid diagnosis of organs and tissues such as the gastrointestinal tract, liver, lungs, respiratory tract, and blood is a highly promising non-invasive detection technology. Some experts hope that breath testing can be combined with CT scans to reduce unnecessary biopsies. This makes it one of the most effective and best methods among today's high-tech clinical diagnostic tools (including invasive colonoscopy). Breath testing for Helicobacter pylori has already been applied clinically, and nitric oxide, as a test indicator for the effectiveness of anti-inflammatory treatment for asthma, has been approved by the US FDA (Sikoff P.E., 2004).

[0003] Currently, the most mature and efficient laser absorption spectroscopy is an analytical technique for detecting volatile gases emitted by the human body. It leverages the unique "fingerprint absorption spectra" of molecules, enabling quantitative analysis and qualitative identification of molecular components. However, while traditional White and Heriot-Lewis cells offer significant advantages, they suffer from complex optical path adjustment, bulky structures, and difficult maintenance. Their high-reflectivity endoscopes are expensive, requiring complex stabilization devices, resulting in poor system stability. Furthermore, these detection cells require thorough rinsing, disinfection, and drying with high-purity nitrogen after each measurement to prevent residual contamination from causing measurement errors and residual viruses from causing cross-infection.

[0004] However, to establish a one-to-one correlation between specific diseases and human exhaled breath, detecting only a single exhaled molecule is far from sufficient. Furthermore, exhaled breath contains not only extremely low concentrations of disease biomarkers but also a wide variety of species. Current technology is limited to detecting breath from the mouth and nose, and there is no detection scheme that simultaneously detects the odor of exhaled gases and their corresponding diseases. The metabolic levels and physiological conditions of different individuals vary at different times, leading to fluctuations and changes in the content and composition of VOCs. The lack of standardized sampling procedures in respiratory sampling is also a major factor contributing to poor reproducibility of results, further limiting the clinical application of breath biopsy. Therefore, a technology capable of analyzing multiple types of exhaled VOCs (exhaled, flatulent, and emitted from skin and hair) will be more comprehensive and important. Measuring a wider range of gas molecules will provide sufficient large-sample information to identify more specific biomarkers for gas odors and their correlation with physiological indicators of diseases. To achieve more accurate qualitative and quantitative analysis of exhaled VOCs, it is necessary to rationally design and optimize the sampling instruments and devices, and to develop detectors and methods that are more comprehensive, highly sensitive, accurate, and have a high signal-to-noise ratio for the human body, thus breaking through application bottlenecks. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spherical suspended gas detector and its detection method with high sensitivity, high accuracy and high signal-to-noise ratio.

[0006] The present invention addresses the shortcomings of existing laser detection methods, such as high cost, large size, single wavelength, and lack of multi-gas simultaneous detection methods.

[0007] One of the objectives is to provide a gas detector that detects "oral and nasal gases + intestinal gas + skin and odors";

[0008] The second objective is to provide a spherical gas absorption cell that employs a combination of a "spherical outer shell and an arc-shaped light reflector";

[0009] The third objective is to provide a sample handling solution that employs a design that "encapsulates the gas sample + eliminates the need for cleaning the instrument chamber";

[0010] The fourth objective is to provide a sample operation scheme that employs "blowing up spherical suspension + descent suction recovery";

[0011] Fifthly, to provide a disease detection and cancer screening solution that employs intelligent "laser trace detection + comprehensive analysis and evaluation".

[0012] To address these issues, this invention provides a detector and method for identifying diseases based on the odor of human body excrement. It employs a gas diffuse reflection absorption cell with suspension technology and a spherical dome structure to extend the optical path, thus solving the aforementioned problems. Furthermore, the refractive index of the laser reflective layer is greater than that of the inner wall of the absorption cell cavity, significantly improving the optical path / cavity size ratio. This allows for the online detection of the concentration of marker gases in human excrement. The detector and method feature a more compact overall structure, simpler operation, higher time resolution, lower cost, smaller size, and lighter weight, making it of significant practical value in developing miniaturized, low-power, and lightweight multi-component gas detectors and applications. It is believed that this device will be well-received by health-conscious individuals, as its simple, efficient, economical, durable, and suitable for large-scale application.

[0013] To achieve the above objectives, the spherical suspended gas detector and its detection method of the present invention are as follows:

[0014] The main feature of this spherical suspended gas detector is that the gas detector includes:

[0015] The base, housing, and top cover are elliptical in shape. The housing is hollow and fixedly mounted on the base. The top cover is fitted onto the top of the housing.

[0016] The casing is equipped with a human-machine interface unit, and a spherical absorption cell is installed inside the casing. A suspension unit is installed inside the spherical absorption cell. A sample injection unit is also installed on the upper side of the spherical absorption cell. Optical path detection units are installed on both the left and right sides of the spherical absorption cell. A signal acquisition and processing unit and a voltage regulator unit are also arranged side by side on the left side of the spherical absorption cell.

[0017] Preferably, the top cover is also equipped with an ID card reader, a body temperature sensor, a video sensor, a computer module, a communication module, and a social security card reader. The ID card reader and social security card reader are used to verify the identity of the person being tested; the body temperature sensor is used to detect the body temperature data of the person being tested; the video sensor is used to detect the physical characteristics of the person being tested; and the computer module and communication module are used to send the acquired information to the user terminal and a cloud-based big data center for storage.

[0018] Preferably, the human-computer interaction unit is embedded on the front surface of the outer side of the housing, and consists of a touch control screen equipped with a speaker module and a voice module. It is used to display the various functional operation interfaces of the current gas detector, and to display and broadcast the selectable options and the corresponding functional detection results.

[0019] Preferably, the spherical absorption cell is a low-temperature controlled absorption cell, consisting of a light reflector with an inner spherical shell. The light reflector is made of polyurethane foam ceramic material with an open three-dimensional mesh skeleton structure, and an inlet is provided on the lower front side for detecting various leaked gases from the human body. The spherical shell is a precision-cast sphere of aluminum alloy comprising an upper hemisphere and a lower hemisphere. A first concave-convex groove and a second concave-convex groove are respectively provided on the plane at the diameter meshing point of the upper and lower hemispheres. The first and second concave-convex grooves are used to tightly fit the upper and lower hemispheres together. A first concave gripper is provided above the first concave-convex groove, and a second concave gripper is provided below the second concave-convex groove. Furthermore, an activated carbon filter layer is provided at the top center of the upper hemisphere shell, and a circular exhaust port is provided above the activated carbon filter layer; a movable hollow metal bracket is provided on the lower hemisphere shell, which is used to support and fix the light reflector; an air inlet with an activated carbon layer filtering the air is provided on the back of the lower hemisphere shell, which is used to allow the spherical absorption pool to draw in filtered gas; a recovery port is provided at the bottom center of the lower hemisphere shell, which is used to recover waste detection samples, and a soap recovery box is provided below the recovery port; a support frame is provided on the bottom side of the lower hemisphere shell, which is used to fix the spherical absorption pool on the base of the gas detector.

[0020] Preferably, the spherical absorption cell has an upper through-hole on the upper right side of the upper hemisphere shell. The optical aperture of the upper through-hole has an incident angle of 15° to allow the light reflector to perform multiple reflections. The upper through-hole is used to emit incident laser light from different angles. The spherical absorption cell has a lower through-hole on the lower left side of the lower hemisphere shell. The incident laser light is diffusely reflected multiple times by the diffuse reflection surface of the polyurethane foam ceramic material inside the spherical absorption cell and then converges to the lower through-hole before being emitted.

[0021] Preferably, the levitation unit includes an electric heating element, a semiconductor cooling element, an exhaust fan, and a lifting fan; wherein,

[0022] The electric heating element and the semiconductor cooling element are used to adjust the temperature and humidity inside the spherical absorption cell;

[0023] The exhaust fan is located between the activated carbon filter layer of the upper hemisphere shell and the circular exhaust port, and is used to control the lifting and suspension of the gas sample being tested.

[0024] The lifting fans are located on the left and right sides of the lower part of the lower hemisphere shell to provide upward support for the gas sample to be tested.

[0025] Preferably, the suspension unit further includes a spiral air curtain, which further includes an air curtain tube, a tee connector, a small through hole, a rotating windshield, an air pump, and a rotating component; wherein,

[0026] The air curtain tube is formed by cutting four hollow arc-shaped bends and connecting them with four T-joints. The edge interface of the T-joints is used to connect to the air outlet of the air pump. The side plane and outer surface of the air curtain tube and the T-joints are respectively provided with two rows of small through holes that are equidistantly distributed and obliquely set towards the outlet along the tangent of the arc-shaped bend. The rotating windshield is a semi-circular rotating module, which is set inside the air curtain tube. It is used to prevent the spiral air curtain from blocking the flow of the sample to be tested to the center of the spherical absorption cell through rotation control. The air pump is used to provide the air force to generate the air curtain. The air curtain tube, T-joints, rotating windshield and air pump are all sleeved and fixed on the hollow annular plane of the rotating component and are integrally fixed on the hollow metal bracket.

[0027] Preferably, the suspension unit further includes a temperature and humidity controller and a power regulator module. Both the temperature and humidity controller and the power regulator module are located on the left side of the spherical absorption cell. The temperature and humidity controller adjusts the temperature and humidity values ​​within the spherical absorption cell by controlling the electric heating element or the semiconductor cooling element, and displays the values ​​on a liquid crystal digital panel. The power regulator module monitors the control data acquired by the temperature and humidity controller to control the rise and fall of the temperature inside the spherical absorption cell, and controls the operating power of the exhaust fan to accelerate the extraction of sample waste gas when the gas detector reaches the extraction stage.

[0028] Preferably, the sample introduction unit includes a soap bubble module, wherein,

[0029] The soap bubble module specifically includes: a soap solution storage tank, a soap solution slow-penetrating device, a soap solution heater, a foaming loop, and a funnel-shaped foaming outlet; the soap solution storage tank is disposed on the spherical absorption pool and connected to the soap solution slow-penetrating device; the lower end of the soap solution slow-penetrating device is connected to the foaming loop; the soap solution heater is a graphene heating film attached to the soap solution slow-penetrating device; and the foaming loop is attached to the funnel-shaped foaming outlet.

[0030] The soap solution storage container is an irregularly shaped tank with a concave arc shape at the bottom that fits into the outer arc of the upper hemisphere shell. Both sides are flush with the diameter of the spherical absorption pool. The soap solution slow-penetrating device is a flat plastic part arranged in two rows. The foaming loop is a leaf-shaped structure with the loop spreading inward, which is used to guide and support the soap solution film penetration and formation. The trumpet-shaped foaming port is located on the side wall of the lower hemisphere shell.

[0031] Preferably, the sample introduction unit further includes: gas path filter material and gas path accessories, wherein the gas path filter material and gas path accessories are combined and disposed inside the horn-shaped bubbling port; wherein,

[0032] The gas path filter material specifically includes several absorbent cottons and a porous material. The absorbent cottons are used to adsorb water vapor in the filtered gas, and the porous material is a metal-organic porous material FJI-H14, which is used to adsorb carbon dioxide in the filtered gas.

[0033] The aforementioned air circuit accessories specifically include a disposable nozzle, a disposable plastic stop valve, a plastic check valve, and an air extraction sleeve. The disposable nozzle is located on the upper part of the absorbent cotton. The disposable plastic stop valve is located on the front insertion module of the air circuit accessories, and the front insertion module is connected to the absorbent cotton. The plastic check valve is located on the rear insertion module of the air circuit accessories, and the rear insertion module is connected to the porous material.

[0034] Preferably, the sample introduction unit further includes a monitoring module, a gas flow sensor, and a vacuum pump, wherein,

[0035] The monitoring module is a 1080P network monitoring camera, used to monitor the operation status of the soap bubble gas sample at different time stages in the spherical absorption pool.

[0036] The airflow sensor can limit the amount of gas input to control the flow rate of gas input by the subject in real time, thereby controlling the volume of the soap bubble gas sample.

[0037] The vacuum pump is equipped with an intake port and an exhaust port. The intake port is used to draw in the sample gas to be tested, and the exhaust port is used to remove the sample gas in the channel connected to the horn-shaped bubble opening.

[0038] Preferably, the optical path detection unit includes: a laser driver, a tunable laser, an optocoupler, a collimating lens, a focusing lens, and a photodetector, wherein...

[0039] The laser driver adopts a time-division driving method and is located at the bottom right side of the spherical absorption cell. The output terminal of the laser driver is connected to the input control terminals of several tunable lasers and is used to drive the tunable lasers to detect the laser intensity of the gas to be detected.

[0040] Several tunable lasers are disposed at the bottom right side of the spherical absorption cell, and each tunable laser is connected to a corresponding collimating lens, and each collimating lens is disposed on the optocoupler.

[0041] The optocoupler is located on the upper right side of the spherical absorption cell and is used to collimate and output the light beam after optical path coupling through the collimating lens to the spherical absorption cell.

[0042] Several collimating lenses are disposed on the upper right side of the spherical absorption cell and on the output port of the optocoupler. The collimating point of the collimating lens is aligned with the upper through hole on the upper right side of the spherical absorption cell, and is used to collimate the coupled laser beam into the spherical absorption cell. The laser output by the tunable laser will be adjusted by the collimating lenses.

[0043] Several of the aforementioned focusing lenses are disposed on the lower left side of the spherical absorption cell and the light inlet of the corresponding photodetector, and the focusing point of the focusing lens is aligned with the lower left through hole of the spherical absorption cell.

[0044] Several photodetectors are disposed at the rear end of the corresponding focusing lens for detecting laser light penetrating the interior of the spherical absorption cell.

[0045] Preferably, the signal acquisition and processing unit has multiple digital input channels and analog output channels. The digital input channels are used to convert the analog drive signals generated by the computer module into digital signals and input them into the tunable laser. The analog output channels are used to provide signal input to the photodetector.

[0046] The voltage regulator unit is used to provide a stable voltage source for the gas detector.

[0047] This method uses a spherical suspended gas detector for detection and processing. The method includes the aforementioned spherical suspended gas detector, and its main feature is that the method includes the following steps:

[0048] (1) Establish a standard model for screening disease information sets by detecting body odor, and establish a healthy human body odor database and an abnormal human body odor database in the standard model;

[0049] (2) The subject should sit facing the spherical suspended gas detector until breathing is stable;

[0050] (3) Start the human-computer interaction unit, the floating unit, the signal acquisition and processing unit, and the voltage regulator unit;

[0051] (4) Empty the internal pipes of the detector, start the vacuum pump, and input the filtered gas into the vacuum pump, airflow sensor, front plug-in module, horn bubbler and spherical absorption cell in the sample injection unit channel through the activated carbon filter layer to clean the residual gas in the sample injection unit; at the same time, start the exhaust fan to clean and exhaust the gas remaining in the spherical absorption cell.

[0052] (5) Start the soap liquid heater of the soap bubble module, and when it reaches 33°C, gradually let the soap liquid drip onto the foaming loop;

[0053] (6) Select the required detection method and corresponding connector according to the options currently displayed by the human-computer interaction unit;

[0054] (7) Prepare the gas sample to be tested;

[0055] (8) The soap bubble gas sample is suspended by a suspension unit;

[0056] (9) After the soap bubbles are introduced, the monitoring module in the spherical absorption cell will send the monitoring signal to the tunable laser so that the laser can be coupled into the spherical absorption cell after being collimated by the collimating lens.

[0057] (10) The incident beam entering the spherical absorption cell forms a uniform light field through direct and diffuse reflection and interacts with the gas to be measured; the laser emitted through the spherical absorption cell is focused by the focusing lens through multiple transmissions to the photodetector for optical path detection processing, and the calculated characteristic peak frequency is imported into the computer module.

[0058] (11) The collected body odor of the test subject is compared and verified with the healthy human body odor database and the abnormal human body odor database.

[0059] (12) The comparison results are sent to the human-computer interaction unit through the computer module and communicated in the form of video or voice.

[0060] (13) The collected detection results and verification results are sent to the user terminal via the GSM network through the communication module, and sent to the big data center for data storage via the data network;

[0061] (14) After the detection is completed, the spherical suspended gas detector will automatically load the extraction and recovery program of soap bubble waste liquid and sample waste gas to carry out environmental cleaning.

[0062] The spherical suspended gas detector and its detection method of the present invention employ a spherical gas absorption cell, which makes the overall structure of the spectral system simpler and more compact, significantly reducing volume, weight, power consumption and cost. It has the advantages of high accuracy, short time, low cost, long optical path, small volume, simple structure, good stability, strong practicality, economic applicability and easy mass production, which can greatly improve medical diagnosis efficiency and has great research and development value and considerable development space. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of the structure of a spherical suspended gas detector according to the present invention.

[0064] Figure 2 This is a schematic diagram of the spherical shell of the spherical gas absorption cell provided in an embodiment of the present invention.

[0065] Figure 3 This is a schematic diagram of the upper hemisphere shell of the spherical gas absorption cell provided in an embodiment of the present invention.

[0066] Figure 4 This is a schematic diagram of the structure of the light reflector of the spherical gas absorption cell provided in an embodiment of the present invention.

[0067] Figure 5 This is a schematic diagram of the structure of the metal bracket of the spherical gas absorption cell provided in an embodiment of the present invention.

[0068] Figure 6 This is a schematic diagram of the lower hemisphere shell of the spherical gas absorption cell provided in an embodiment of the present invention.

[0069] Figure 7 This is a schematic diagram of the structure of the suspension unit in the spherical gas absorption pool provided in an embodiment of the present invention.

[0070] Figure 8 This is a schematic diagram of the spiral air curtain in the spherical gas absorption pool provided in an embodiment of the present invention.

[0071] Figure 9 This is a schematic diagram of the sample introduction unit in the spherical gas absorption cell provided in an embodiment of the present invention.

[0072] Figure 10 This is a schematic diagram of the gas path filter material and gas path accessories in the spherical gas absorption tank provided in an embodiment of the present invention.

[0073] Figure 11 This is another structural schematic diagram of the gas path filter material and gas path accessories in the spherical gas absorption pool provided in an embodiment of the present invention.

[0074] Figure 12 This is a schematic diagram of the structure of a disposable nozzle in a spherical gas absorption tank provided in an embodiment of the present invention.

[0075] Figure 13 This is a schematic diagram of the structure of the gas extraction sleeve in the spherical gas absorption pool provided in an embodiment of the present invention.

[0076] Figure 14 This is a schematic diagram of the structure of the plastic check valve in the spherical gas absorption tank provided in an embodiment of the present invention.

[0077] Figure 15 This is a schematic diagram showing the gradual shrinkage of a soap bubble sample in a spherical gas absorption cell provided in an embodiment of the present invention.

[0078] Figure 16 This is a schematic diagram of the optical path detection unit in the spherical gas absorption cell provided in an embodiment of the present invention.

[0079] Figure 17 This is a schematic diagram of the circuit control relationship in a gas detector provided in an embodiment of the present invention.

[0080] Figure Labels

[0081] 1. Base 2. Housing 3. Top Cover 3-1. ID Card Reader 3-2. Body Temperature Sensor 3-3. Video Sensor 3-4. Computer Module 3-5. Communication Module 3-6. Social Security Card Reader 4. Human-Computer Interaction Unit 4-1. Speaker Module 4-2. Voice Module 4-3. Touch Control Screen 5. Spherical Absorption Cell 6. Suspension Unit 7. Sample Injection Unit 8. Optical Path Detection Unit 9. Signal Acquisition and Processing Unit 10. Regulated Power Supply Unit 11. Light Reflector 11-1. Sample Inlet 12. Spherical Hollow Shell 13. Upper Hemisphere Shell 14. Lower Hemisphere Shell 15. First Concave-convex Slot 16. Second Concave-convex Slot 17. First Inwardly Concave Grip 18. Second Inwardly Concave Grip 19. Activated Carbon Filter Layer 20. Circular Exhaust Vent 21. Hollow Metal Bracket 22. Air Inlet 23. Recycling Port 24. Soap Liquid Recycling Box 25. Support Frame 26. Upper Through Hole 27. Lower Through Hole 28-1. Electric Heating Plate

[0082] 28-2 Semiconductor cooling chip 29 Exhaust fan 30 Blowing fan 31 Spiral air curtain 31-1 Air curtain round tube 31-2 T-connector 31-3 Small through hole 31-4 Rotating windshield 31-5 Air pump 31-6 Small through hole 32 Temperature and humidity controller 33 Power regulator module 34 Soap bubble sample 36 Soap bubble module 36-1 Soap solution storage 36-2 Soap solution slow infiltration device 36-3 Soap solution heater 36-4 Bubble ring 36-5 Horn-shaped bubble outlet

[0083] 37 Air Filter Media; 37-1 Absorbent Cotton; 37-2 Porous Material; 38 Air Accessories

[0084] 38-1 Disposable mouthpiece; 38-2 Disposable plastic stop valve; 38-3 Plastic check valve; 38-4 Suction tube sleeve; 38-5 Front connector module; 38-6 Rear connector module; 39 Monitoring module; 40 Airflow sensor

[0085] 41 Vacuum pump 43 Laser driver 44 Tunable laser

[0086] 45 Optocoupler 46 Collimating lens 47 Focusing lens 48 Photodetector 49 Circuit control unit Detailed Implementation

[0087] To more clearly describe the technical content of the present invention, the following description is provided in conjunction with specific embodiments.

[0088] Before describing the embodiments of the present invention in detail, it should be noted that, in the following, the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0089] Please see Figure 1 As shown, the spherical suspended gas detector includes:

[0090] The device consists of an elliptical base 1, a housing 2, and a top cover 3. The housing 2 is hollow and is fixedly mounted on the base 1. The top cover 3 is fitted onto the top of the housing 2.

[0091] The housing 2 is provided with a human-machine interaction unit 4, and a spherical absorption cell 5 is provided inside the housing 2. A suspension unit 6 is provided inside the spherical absorption cell 5. A sample injection unit 7 is also provided on the front side of the spherical absorption cell 5. Optical path detection units 8 are provided on both the left and right sides of the spherical absorption cell 5. A signal acquisition and processing unit 9 and a voltage regulator unit 10 are also arranged side by side on the left side of the spherical absorption cell 5.

[0092] In a preferred embodiment of the present invention, the top cover 3 is further provided with an ID card reader 3-1, a body temperature sensor 3-2, a video sensor 3-3, a computer module 3-4, a communication module 3-5, and a social security card reader 3-6. The ID card reader 3-1 and the social security card reader 3-6 are used to verify the identity of the person being tested; the body temperature sensor 3-2 is used to detect the body temperature data of the person being tested; the video sensor 3-3 is used to detect the physical characteristics of the person being tested; and the computer module 3-4 and the communication module 3-5 are used to send the acquired information to the user terminal and the cloud big data center for storage.

[0093] In a preferred embodiment of the present invention, the human-computer interaction unit 4 is embedded on the front surface of the outer side of the housing 2, and consists of a touch control screen 4-3 equipped with a speaker module 4-1 and a voice module 4-2. It is used to display the various functional operation interfaces of the current gas detector, and to display and broadcast the selectable options and the corresponding functional detection results.

[0094] In a preferred embodiment of the present invention, the spherical absorption cell 5 is a low-temperature controlled absorption cell, consisting of a light reflector 11 with an inner spherical shell 12. The light reflector 11 is made of polyurethane foam ceramic material with an open three-dimensional mesh skeleton structure, and an inlet 11-1 is provided on the lower front side. The inlet 11-1 is used to detect various leaked gases from the human body. The spherical shell 12 is a precision-cast sphere made of aluminum alloy, comprising an upper hemisphere 13 and a lower hemisphere 14. A first concave-convex groove 15 and a second concave-convex groove 16 are respectively provided on the plane at the diameter meshing point of the upper hemisphere 13 and the lower hemisphere 14. The first concave-convex groove 15 and the second concave-convex groove 16 are used to tightly fit the upper hemisphere 13 and the lower hemisphere 14 together. A first concave gripper 17 is provided above the first concave-convex groove 15, and a second concave gripper 17 is provided below the second concave-convex groove 16. Two concave grippers 18; and an activated carbon filter layer 19 is provided at the top center of the upper hemisphere shell 13, and a circular exhaust port 20 is provided above the activated carbon filter layer 19; a movable hollow metal bracket 21 is provided on the lower hemisphere shell 14, and the hollow metal bracket 21 is used to support and fix the light reflector 11; an air inlet 22 with an activated carbon layer filtering air is provided on the back of the lower hemisphere shell 14, and the air inlet 22 is used to allow the spherical absorption pool 5 to draw in filtered gas; a recovery port 23 is provided at the bottom center of the lower hemisphere shell 14, and the recovery port 23 is used to recover the waste detection sample, and a soap liquid recovery box 24 is provided below the recovery port 23; a support frame 25 is provided on the bottom side of the lower hemisphere shell 14, and the support frame 25 is used to fix the spherical absorption pool 5 on the base 1 of the gas detector.

[0095] In a preferred embodiment of the present invention, the spherical absorption cell 5 has an upper through hole 26 on the upper right side of the upper hemisphere shell 13. The optical aperture of the upper through hole 26 has an incident angle of 15° to satisfy the multiple reflection processing of the light reflector 11. The upper through hole 26 is used to emit incident laser from different angles. The spherical absorption cell 5 has a lower through hole 27 on the lower left side of the lower hemisphere shell 14. The incident laser is diffusely reflected multiple times by the diffuse reflection surface of the polyurethane foam ceramic material inside the spherical absorption cell 5 and then converges to the lower through hole 27 before being emitted.

[0096] In a preferred embodiment of the present invention, the levitation unit 6 includes an electric heating element 28-1, a semiconductor cooling element 28-2, an exhaust fan 29, and a lifting fan 30; wherein...

[0097] The electric heating element 28-1 and the semiconductor cooling element 28-2 are disposed on the side of the bottom of the spherical absorption cell 5 to control the temperature and humidity inside the spherical absorption cell 5.

[0098] The exhaust fan 29 is disposed between the activated carbon filter layer 19 and the circular exhaust port 20 of the upper hemispherical shell 13, and is used to control the lifting and suspension of the gas sample to be tested.

[0099] The lifting fan 30 is located on the left and right sides of the lower part of the lower hemisphere shell 14 to provide upward support for the gas sample to be tested.

[0100] In practical applications, the temperature is appropriately increased by the electric heating element 28-1 to allow water vapor to evaporate, or the temperature is decreased by the semiconductor cooling element 28-2 to increase the humidity within the spherical absorption cell 5. This is to prevent the soap bubble sample 34 from rapidly bursting due to excessively high temperature or low humidity within the spherical absorption cell 5. Simultaneously, because the gas molecules detected in this technical solution exhibit strong absorption characteristics for specific wavelengths of light, when using a deuterium lamp as the ultraviolet light source for measurement, gases such as NO and C3H8O show strong absorption bands in the 200nm–250nm wavelength range, while water molecules and other gases show almost no absorption.

[0101] In a preferred embodiment of the present invention, the suspension unit 6 further includes a spiral air curtain 31, which further includes an air curtain tube 31-1, a three-way connector 31-2, a small through hole 31-3, a rotating windshield 31-4, an air pump 31-5, and a rotating component 31-6; wherein...

[0102] The air curtain tube 31-1 is formed by inserting four hollow arc-shaped bends into four T-joints 31-2. The edge interface of the T-joints 31-2 is used to connect to the air outlet of the air pump 31-5. The side plane and outer surface of both the air curtain tube 31-1 and the T-joints 31-2 are provided with two rows of equidistantly distributed, obliquely arranged through holes 31-3 along the tangent of the arc-shaped bend towards the outlet. The rotating windshield 31-4 is a semi-circular rotating module, which is located on the... The inner side of the spiral air curtain tube 31-1 is controlled by rotation to prevent the spiral air curtain 31 from blocking the flow of the sample to be tested to the center of the spherical absorption cell 5; the air pump 31-5 is used to provide the air force for the spiral air curtain 31 to generate the air curtain; the spiral air curtain tube 31-1, the three-way connector 31-2, the rotating windshield 31-4 and the air pump 31-5 are all sleeved and fixed on the hollow annular plane of the rotating component 31-6, and are integrally fixed on the hollow metal bracket 21.

[0103] In a preferred embodiment of the present invention, the suspension unit 6 further includes a temperature and humidity controller 32 and a power regulator module 33. The temperature and humidity controller 32 and the power regulator module 33 are both located on the left side of the spherical absorption pool 5. The temperature and humidity controller 32 adjusts the temperature and humidity values ​​inside the spherical absorption pool 5 by controlling the electric heating element 28-1 or the semiconductor cooling element 28-2, and displays the values ​​through a liquid crystal digital panel. The power regulator module 33 controls the rise and fall of the internal temperature of the spherical absorption pool 5 by monitoring the control data obtained by the temperature and humidity controller 32, and controls the working power of the exhaust fan 29 to accelerate the exhaust of sample waste gas when the gas detector reaches the exhaust stage.

[0104] In a preferred embodiment of the present invention, the sample introduction unit 7 includes a soap bubble module 36, wherein...

[0105] The soap bubble module 36 specifically includes: a soap solution storage unit 36-1, a soap solution slow-penetrating device 36-2, a soap solution heater 36-3, a foaming loop 36-4, and a trumpet-shaped foaming outlet 36-5; the soap solution storage unit 36-1 is disposed on the spherical absorption pool 5 and connected to the soap solution slow-penetrating device 36-2; the lower end of the soap solution slow-penetrating device 36-2 is connected to the foaming loop 36-4; the soap solution heater 36-3 is a graphene heating film attached to the soap solution slow-penetrating device 36-2; and the foaming loop 36-4 is attached to the trumpet-shaped foaming outlet 36-5.

[0106] The soap solution storage container 36-1 is an irregularly shaped tank with a concave arc shape at the bottom that fits against the outer arc of the upper hemisphere shell 13. Both sides are flush with the diameter of the spherical absorption pool 5. The soap solution slow-penetrating device 36-2 is a flat plastic part arranged in two rows. The foaming loop 36-4 is a leaf-shaped structure with the loop spreading inward, which is used to guide and support the soap solution film penetration and formation. The trumpet-shaped foaming port 36-5 is located on the side wall of the lower hemisphere shell 14.

[0107] In a preferred embodiment of the present invention, the sample introduction unit 7 further includes: a gas path filter material 37 and a gas path accessory 38, wherein the gas path filter material 37 and the gas path accessory 38 are combined and disposed inside the horn-shaped bubbling port 36-5; wherein...

[0108] The gas filter material 37 specifically includes several absorbent cottons 37-1 and a porous material 37-2. The absorbent cottons 37-1 are used to adsorb water vapor in the filtered gas, and the porous material 37-2 is a metal-organic porous material FJI-H14, which is used to adsorb carbon dioxide in the filtered gas.

[0109] The air circuit accessory 38 specifically includes a disposable nozzle 38-1, a disposable plastic stop valve 38-2, a plastic check valve 38-3, and an air extraction sleeve 38-4. The disposable nozzle 38-1 is located on the upper part of the absorbent cotton 37-1. The disposable plastic stop valve 38-2 is located on the front insertion module 38-5 of the air circuit accessory 38, and the front insertion module 38-5 is connected to the absorbent cotton 37-1. The plastic check valve 38-3 is located on the rear insertion module 38-6 of the air circuit accessory 38, and the rear insertion module 38-6 is connected to the porous material 37-2.

[0110] In a preferred embodiment of the present invention, the sample introduction unit 7 further includes a monitoring module 39, a gas flow sensor 40, and a vacuum pump 41, wherein...

[0111] The monitoring module 39 is a network monitoring 1080P camera used to monitor the operation status of the soap bubble gas sample at different time stages in the spherical absorption pool 5.

[0112] The airflow sensor 40 can limit the amount of gas input to control the flow rate of the gas input by the subject in real time, thereby controlling the volume of the soap bubble gas sample.

[0113] The vacuum pump 41 is provided with an air intake port and an exhaust port. The air intake port is used to draw in the sample gas to be tested, and the exhaust port is used to remove the sample gas in the channel connected to the horn bubble port 36-5.

[0114] In a preferred embodiment of the present invention, the optical path detection unit 8 includes: a laser driver 43, a tunable laser 44, an optocoupler 45, a collimating lens 46, a focusing lens 47, and a photodetector 48, wherein...

[0115] The laser driver 43 adopts a time-division driving method and is located at the bottom right side of the spherical absorption cell 5. The output end of the laser driver 43 is connected to the input control end of several tunable lasers 44 to drive the tunable lasers 44 to detect the laser intensity of the gas to be detected.

[0116] Several tunable lasers 44 are disposed at the bottom right side of the spherical absorption cell 5, and each tunable laser 44 is connected to a corresponding collimating lens 46, and each collimating lens 46 is disposed on the optocoupler 45.

[0117] The optocoupler 45 is located at the upper right side of the spherical absorption cell 5 and is used to collimate and output the light beam after optical path coupling processing to the spherical absorption cell 5 through the collimating lens 46.

[0118] Several collimating lenses 46 are disposed on the upper right side of the spherical absorption cell 5 and on the light output port of the optocoupler 45. The collimating point of the collimating lens 46 is aligned with the upper through hole 26 on the upper right side of the spherical absorption cell 5, and is used to collimate the coupled laser beam into the spherical absorption cell 5. The laser output by the tunable laser 44 will be adjusted by the collimating lens 46.

[0119] Several of the aforementioned focusing lenses 47 are disposed on the lower left side of the spherical absorption cell 5 and the light inlet of the corresponding photodetector 48, and the focusing point of the focusing lens 47 is aligned with the lower through hole 27 on the lower left side of the spherical absorption cell 5.

[0120] Several photodetectors 48 are disposed at the rear end of the corresponding focusing lens 47 for detecting laser light that penetrates the interior of the spherical absorption cell 5.

[0121] In a preferred embodiment of the present invention, the signal acquisition and processing unit 9 has multiple digital input channels and analog output channels. The digital input channels are used to convert the analog drive signals generated by the computer module 3-4 into digital signals and input them into the tunable laser 44. The analog output channels are used to provide signal input to the photodetector 48.

[0122] The voltage regulator unit 10 is used to provide a stable voltage source for the gas detector.

[0123] The method for detection and processing using a spherical suspended gas detector includes the aforementioned spherical suspended gas detector, and comprises the following steps:

[0124] (1) Establish a standard model for screening disease information sets by detecting body odor, and establish a healthy human body odor database and an abnormal human body odor database in the standard model;

[0125] (2) The subject should sit facing the spherical suspended gas detector until breathing is stable;

[0126] (3) Start the human-computer interaction unit 4, the floating unit 6, the signal acquisition and processing unit 9 and the voltage regulator unit 10;

[0127] (4) Empty the internal pipes of the detector, start the vacuum pump 41, and input the filtered gas into the vacuum pump 41, airflow sensor 40, front plug-in module 38-5, horn bubbler 36-5 and spherical absorption cell 5 in the sample injection unit 7 through the activated carbon filter layer 19 to clean the residual gas in the sample injection unit 7; at the same time, start the exhaust fan 29 to clean and exhaust the gas remaining in the spherical absorption cell 5.

[0128] (5) Start the soap liquid heater 36-3 of the soap bubble module 36, and when it reaches 33°C, gradually let the soap liquid drip onto the foaming loop (36.4);

[0129] (6) Select the required detection method and corresponding connector according to the options currently displayed by the human-computer interaction unit 4;

[0130] (7) Prepare the gas sample to be tested;

[0131] (8) The soap bubble gas sample is suspended by the suspension unit 6;

[0132] (9) After the soap bubbles are introduced, the monitoring module 39 in the spherical absorption pool 5 will send the monitoring signal to the tunable laser 44, so that the laser can be coupled into the spherical absorption pool 5 after being collimated by the collimating lens 46.

[0133] (10) The incident beam entering the spherical absorption cell 5 forms a uniform light field through direct and diffuse reflection and interacts with the gas to be tested; the laser emitted through the spherical absorption cell 5 is multi-channel focused by the focusing lens 47 to the photodetector 48 for optical path detection processing, and the calculated characteristic peak frequency is imported into the computer module 3-4.

[0134] (11) The collected body odor of the test subject is compared and verified with the healthy human body odor database and the abnormal human body odor database.

[0135] (12) The comparison results are sent to the human-computer interaction unit 4 through computer module 3-4 and communicated in the form of video or voice.

[0136] (13) The collected detection results and verification results are sent to the user terminal via the GSM network through the communication module 3-5, and sent to the big data center for data storage via the data network;

[0137] (14) After the detection is completed, the spherical suspended gas detector will automatically load the extraction and recovery program of soap bubble waste liquid and sample waste gas to carry out environmental cleaning.

[0138] Please see Figure 1 As shown below, the spherical suspended gas detector of this technical solution will be further described in detail. It includes: an elliptical detector base 1, a housing 2 and a top cover 3, as well as a human-machine interaction unit 4, a spherical absorption cell 5, a wind-driven suspension unit 6, a sample introduction unit 7, an optical path detection unit 8, a signal acquisition and processing unit 9, a voltage regulator unit 10, and a customer mobile terminal and a big data center.

[0139] The top cover 3 is fitted onto the base 1 and the housing 2, and together they form the outer shell of the gas detector.

[0140] The top cover 3 houses an ID card reader 3-3, a body temperature sensor 3-2, a video sensor 3-3, a computer module 3-4, a communication module 3-5, and a social security card reader 3-6. The ID card reader 3-1 and the social security card reader 3-6 are used to verify the identity and benefits of the person being tested. The body temperature sensor 3-2 and the video sensor 3-3 are used to detect the body temperature data and physical characteristics of the person being tested. The computer module 3-4 and the communication module 3-5 send the analysis and processing results to the customer's mobile phone and a big data center for storage via the network.

[0141] The human-computer interaction unit 4 is attached to the outside of the elliptical major axis housing 2 of the detector, and is used to display the operation interface of the gas detector, display the available options and the detection results.

[0142] The spherical absorption pool 5 is disposed on the base 1 and inside the housing 2 to form an integrated cavity for direct collection and gas detection of diseases;

[0143] The suspension unit 6 is disposed inside the spherical absorption cell 5 and is used to provide levitation force for the gas sample being detected.

[0144] The sample introduction unit 7 is located directly below the spherical absorption cell 5 and is used to input the gas sample for detection.

[0145] The optical path detection unit 8 is disposed on the left and right sides of the spherical absorption cell 5 and is disposed together on the base 1 and inside the housing 2, and is used to detect the sample concentration in the spherical absorption cell 5.

[0146] The signal acquisition and processing unit 9 and the voltage regulator unit 10 are located on the left side of the spherical absorption cell 5, above the base 1, and inside the housing 2. The signal acquisition and processing unit 9 is used to convert the input analog signal into a digital signal, and then the computer module 3-4 analyzes and processes the acquired digital signal in real time through the signal analysis circuit. The voltage regulator unit 10 is used to provide stable power to the detector.

[0147] The computer module 3-4, communication module 3-5, human-computer interaction unit 4, spherical absorption cell 5, suspension unit 6, sample introduction unit 7, optical path detection unit 8, and signal acquisition and processing unit 9 in the gas detector are all electrically connected to the voltage regulator unit 10; the communication module 3-5 is connected and communicates with the customer's mobile phone and big data center through the network.

[0148] Please see Figure 1 As shown, the human-machine interaction unit 4 consists of an arc-shaped touch control screen 4-3 with a speaker module 4-1 and a voice module 4-2. The human-machine interaction unit 4 is attached to the outer surface of the housing 2 and is electrically connected to the computer module 3-4 and the voltage regulator unit 9. The human-machine interaction unit 4 is used to display the operation interface and parameters of various components of the gas detector. At the same time, according to the guidance of the operation interface on the screen of the human-machine interaction unit 4, the prompts of the speaker module 4-1 and the voice module 4-2, the selected application can be viewed and the corresponding options can be selected on the operation interface. After the operation, the corresponding detection results will be displayed on the screen of the human-machine interaction unit 4.

[0149] The spherical absorption cell 5, such as Figure 2 As shown, it is composed of a light reflector 11 fitted inside a spherical shell 12. The spherical absorption cell 5 is a low-temperature controlled absorption cell (refer to a similar desktop stainless steel low-temperature controlled absorption cell volume fraction calibration device), and adopts a detection mode that encapsulates trace gas samples. The influence of its gas absorption transmittance is less than 0.05%, and the influence on the inverted volume fraction will not exceed 0.70%, thus meeting the needs of volume fraction calibration.

[0150] The spherical absorption cell 5 (e.g.) Figure 3As shown, on the inner and outer layers of the light reflector 11 and the spherical shell 12, an optical aperture with a φ5mm upper through-hole 26 is formed on the upper right side, with an angle of 15° satisfying the multiple reflection law within the light reflector 11. The upper right side of this aperture is a straight through-hole for emitting incident laser light, which is then transmitted and collimated before being incident on. The optical path entrance on the right side is connected to the collimating lens 46 and the output end of the optocoupler 45. On the lower left side, a φ5mm lower through-hole 27 is formed, which is a straight through-hole for transmitting and reflecting multiple-reflection laser light. The optical path exit on the left side is connected to the focusing lens and the input end of the photodetector. The laser light can enter from different angles on the upper right side of the spherical absorption cell 5, and after multiple diffuse reflections through the diffuse reflection surface of the polyurethane foam ceramic material, it converges to the lower through-hole 27 of the spherical absorption cell 5 and exits. The light reflector 11 and the spherical shell 12 constitute a spherical absorption cell 5 that integrates direct sampling, gas detection, and disease measurement.

[0151] The light reflector 11, such as Figure 3 As shown, a polyurethane foam ceramic material with a pore size of 100um to 5mm, a porosity of 70% to 90%, and an open-cell three-dimensional mesh skeleton structure is used. It is cast into a ring-shaped light reflector 11 with an outer diameter of φ200, a height of 160mm, and a wall thickness of 15mm. The light reflector 11 has a sample inlet 11-1 on the lower front side. The reflectivity of this material is greater than 98% in the 250-1500nm range and greater than 95% in the 250-2200nm range. After repeated direct illumination at small angles and diffuse reflection over a wide range, the optical path can reach more than 12m, making it suitable for detecting various leaked gases from the human body.

[0152] The spherical hollow shell 12, as Figure 4 As shown, the sphere is precision cast from aluminum alloy with an inner diameter of φ200+1mm and a wall thickness of 12mm. It has an upper hemisphere shell 13 and a lower hemisphere shell 14. The meshing planes of the upper and lower hemispheres are respectively provided with a first concave-convex groove 15 and a second concave-convex groove 16 for the precision fitting of the two hemispheres. The outer surfaces of the upper and lower hemispheres are respectively provided with a first concave gripper 17 and a second concave gripper 18 for gripping and assembling the sphere. The top center of the upper hemisphere shell 13 is provided with an activated carbon filter layer 19 of φ80mm and a circular exhaust port 20 at the top of the upper hemisphere shell 13.

[0153] The lower hemispherical shell 14, as Figure 5 , Figure 6The device is shown with a movable hollow metal bracket 21 for supporting and fixing the light reflector 11; its back is provided with an air inlet 22 with an activated carbon layer for filtering air, which is 60mm long and 40mm high, for the entry of filtered gas into the spherical absorption pool 5; its bottom center is provided with a φ70mm recycling port 23 for recycling waste detection samples; its bottom inner side is provided with a soap liquid recycling box 24; and its bottom lower side is provided with a circular support frame 25 for fixing the spherical absorption pool 5 on the base 1 of the detector.

[0154] The levitation unit 6, such as Figure 7 As shown, it includes an electric heating element 28-1, a semiconductor cooling element 28-2, an exhaust fan 29, a blower fan 30, a spiral air curtain 31, a temperature and humidity controller 32, and a power regulator module 33. The 12V electric heating element 28-1 and the semiconductor cooling element 28-2 are attached to the bottom side of the spherical absorption pool to control the temperature and humidity inside the spherical absorption pool.

[0155] The exhaust fan 29 is an adjustable power exhaust fan and an activated carbon filter layer 6211 below it. The exhaust fan 29 is located at the top center of the spherical absorption pool 5. When the gas sample to be tested enters, it uses a lower power to lift and suspend the gas sample. After the gas sample is detected, the power regulator module 33 is used to increase the power to exhaust and clear the sample waste gas in the spherical absorption pool 5 after the detection is completed.

[0156] The lifting fan 30 uses a set of two miniature cooling fans. The lifting fan 6-22 is located on the left and right sides inside the front of the lower hemisphere 5-4 of the spherical absorption cell 5, and is used to provide upward support to the gas sample to be tested.

[0157] The spiral air curtain 31, as Figure 8 As shown, it includes: an air curtain tube 31-1, a tee connector 31-2, a small through hole 31-3, a rotating windshield 31-4, an air pump 31-5, and a rotating component 31-6;

[0158] The air curtain tube 31-1 is formed by cutting four hollow arc-shaped bends and connecting them with four T-joints 31-2. The edge interface of the T-joints 31-2 is used to connect to the air outlet of the air pump 31-3. The side plane and outer surface of the air curtain tube 31-1 and the T-joints 31-2 are respectively provided with two rows of equidistantly distributed, φ5mm small through holes 31-3 obliquely towards the outlet along the tangent of the arc-shaped bend. The rotating wind deflector 31-4 is a semi-circular rotating module, which is set inside the air curtain tube 31-1 and located on the straight movement path of the sample to be tested. It is used to prevent the spiral air curtain 31 from blocking the sample to be tested from drifting towards the center of the spherical absorption pool 5. The rotating windshield 31-4 is a module that is electrically controlled to rotate mechanically. It is electrically linked with the lifting fan 30. When the lifting fan 30 starts blowing air, the rotating windshield 31-4 immediately rotates to seal and block the air curtain tube 31-1 in the floating path of the sample under test. Conversely, when the lifting fan 30 stops blowing air, the rotating windshield 31-4 immediately moves to stop blocking, and the air curtain tube 31-1 can restore the annular spiral air curtain 31, which will keep the sample under test suspended in the center of the spherical absorption cell 5.

[0159] The air pump 31-5 is a 555b type air pump, used to provide the air force for generating the air curtain to the air curtain tube 31-1; the air curtain tube 31-1 is connected to the three-way connector 31-2, the rotating windshield 31-4 and the air pump 31-5 and then fixed on the hollow annular plane of the lightweight rotating component 31-6, and then together fixed on the plane of the metal bracket 21.

[0160] The rotating component 31-6 adopts a lightweight slewing bearing, which drives the spiral air curtain 31 and the air pump 31-5 to rotate continuously and uniformly, thereby transforming the oblique airflow blown out from the small through holes 31-3 on the air curtain tube 31-1 into a spirally rising rotating air curtain, ultimately forming a suspension of the gas sample to be tested in the center of the spherical absorption cell 5.

[0161] The operation and function of the aforementioned levitation unit 6:

[0162] (1) Boost: First, the exhaust fan 29, the lifting fan 30, and the spiral air curtain 31 in the spherical absorption cell 5 are started simultaneously. After the gas sample to be tested is generated and floats up, the two lifting fans 30 blow out the airflow obliquely upward on both sides of the gas sample to be tested, causing the gas sample to be tested to accelerate towards the central area of ​​the spherical absorption cell 5.

[0163] (2) Anti-obstruction: The spiral air curtain 31 is fixed with an arc-shaped rotating windshield 31-4 at the path of the gas sample to be tested drifting toward the spherical absorption pool 5, which is used to block the airflow curtain of the spiral air curtain 31 from causing the gas sample to drift and deviate.

[0164] (3) Locking: After the gas sample to be tested drifts into the center of the spherical absorption pool 5, it will be blocked and controlled by the airflow curtain of the spiral wind curtain 31 and the fence-like obstruction of the lifting fan 30, and thus remain in the center of the spherical absorption pool 5.

[0165] (4) Floating: When the gas sample being tested floats into the center of the spherical absorption pool 5, it will rotate and float horizontally under the support and control of the spiral upward airflow generated by the spiral wind curtain 31.

[0166] (5) Cleaning: When the gas sample being tested remains at the center of the spherical absorption cell 5 for more than ten seconds, under the irradiation of the detection laser and the blowing of the spiral airflow, the gas sample will gradually degas, dehydrate, wrinkle, and shrink. At this time, the exhaust fan 29 will generate a continuously increasing upward suction airflow at the top of the gas sample, which is used to gradually counteract the weightlessness and sag of the gas sample caused by the reduction of buoyancy, and also to completely exhaust the residual gas in the spherical absorption cell 5 to avoid interfering with the next detection result.

[0167] The temperature and humidity controller 32 is located on the left side of the spherical absorption pool 5 and on the base 1. It uses a microcontroller as the control core and a high-performance intelligent temperature and humidity sensor to simultaneously measure and control the temperature and humidity signals inside the spherical absorption pool 5. It adjusts the temperature and humidity values ​​by controlling the exhaust fan 29 and the heating element 28-1 or the semiconductor cooling element 28-2 inside the spherical absorption pool 5, and realizes the LCD digital display. The upper and lower limits of temperature and humidity can also be set and displayed by the buttons on the panel of the intelligent temperature and humidity controller 32. Thus, the spherical absorption pool 5 can automatically start the fan or heater according to the usage conditions to automatically adjust the actual temperature and humidity inside the sphere being measured.

[0168] The power regulator module 33 is located on the left side of the spherical absorption cell 5 and on the base 1. It adopts a high-power thyristor electronic voltage regulator to adjust the power of the electric heating element 28-1 and the semiconductor cooling element 28-2 according to the monitoring data of the intelligent temperature and humidity controller 32, so as to control the rise and fall of the temperature in the spherical absorption cell 5. When the program enters the extraction stage after the gas sample is detected, the power of the extraction fan 29 will be increased by adjusting to quickly extract the escaped sample waste gas from the gradually shrinking soap bubble.

[0169] The soap bubble sample 34, such as Figure 7 , Figure 14 As shown, a soap bubble containing a gas sample, with a diameter of φ100mm, is used to scan and detect the entire process of "generation, drifting in, detection, shrinkage, and recovery" within the spherical absorption cell 5.

[0170] The injection unit 7 (e.g.) Figure 9 As shown, it includes: a soap bubble module 36, a gas path filter material 37 and a gas path accessory 38, a monitoring module 39, a gas flow sensor 40, and a vacuum pump 41. The sample injection unit 7 is located on the bottom front of the lower hemisphere shell 14 of the spherical absorption cell 5 and below the human-machine interaction unit 4. The sample injection unit 7 is used to generate the soap bubble gas sample.

[0171] The soap bubble module 36 includes ① soap liquid storage 36-1, ② soap liquid slow-diffusion device 36-2, ③ soap liquid heater 36-3, ④ foaming coil 36-4, and ⑤ trumpet-shaped foaming nozzle 36-5, as shown in the table below:

[0172]

[0173]

[0174] Air filter media 37 and air accessories 38

[0175] (1) Use absorbent cotton 37-1 and air circuit accessories 38 (such as...) Figure 10 , Figure 11 , Figure 12 Applications and effects (as shown):

[0176] Accessories: ① Disposable mouthpiece 38-1

[0177] ②Evacuation tube sleeve with semi-circular end cap 38-4

[0178] ③ Front connector module 38-5 equipped with "disposable plastic stop valve 38-2";

[0179] Application: ① Direct blowing: Insert the soap into your lips and blow air into the air passage of the soap vent 36-5;

[0180] ② Indirect air extraction: Insert into the oral cavity and extract air into the air passage of the soap funnel foaming port 36-5;

[0181] Close to the body, into the air passage of the soap's foaming nozzle 36-5, from the groin area outside the body.

[0182] (Or draw gas in through the armpit, hair, or skin);

[0183] Effect: The absorbent cotton 37-1 is used to absorb H2O water vapor in the gas, avoiding affecting the measurement accuracy and preventing cross-contamination;

[0184] (2) Use porous material 37-2 and air passage accessories 38 (such as...) Figure 10 , Figure 13 Applications and effects (as shown):

[0185] Gas circuit accessories: Rear plug-in module 38-6 equipped with "plastic check valve 38-3";

[0186] Application: Direct absorption of gas introduced into the gas path of the soap horn foaming port 36-5;

[0187] Effect: The porous material 37-2 is a metal-organic porous material FJI-H14, which is used to adsorb carbon dioxide gas in the gas. It has ultra-high adsorption performance for CO2 and efficient CO2 catalytic conversion at normal temperature and pressure. It can be used repeatedly without deactivation.

[0188] The monitoring module 39 is a 1080P network monitoring camera, which is set at the upper and lower corners of the annular light reflection ring to monitor the operation status of the soap bubble gas sample in the spherical absorption pool 5 at different time stages.

[0189] The airflow sensor 40 uses an Omron D6F-P-MEMS gas flow sensor (DC3.1V, 0~0.1L / min) to limit the amount of gas input and control the soap bubble volume to 40~45mm3. It is used to control the flow rate of the gas input by the subject in real time, thereby controlling the volume of the soap bubble gas sample.

[0190] The vacuum pump 41 uses three mini vacuum pumps of Hailin Company D08 (5V), which are small in size (40*17*23.5mm) and low in power consumption, making them particularly suitable for portable equipment. The vacuum pump 7-6 in this case is used to draw in "sample gas" via its suction port and to purge "sample gas from the channel" via its exhaust port.

[0191] The airflow sensor 40, vacuum pump 41, and circuit control unit 49 are electrically connected.

[0192] The optical path detection unit 8 (such as...) Figure 15 As shown, it includes a laser driver and N lasers, where N is a tunable laser consisting of integers greater than 1, an optocoupler, a collimating lens, a focusing lens, and a photodetector.

[0193] The laser driver 43 is located at the bottom right side of the spherical absorption cell 5. The output terminal of the laser driver 43 is connected to the input control terminal of each of the tunable lasers 44. The laser driver 43 adopts a time-division driving method to drive multiple tunable lasers 44 to detect the laser intensity of the gas to be detected.

[0194] The tunable laser 44 is located at the bottom right side of the spherical absorption cell 5, at the front end of the collimating lens 46, and its output is connected to the input of the optocoupler 45. To reduce noise interference and detect multi-component gases, the tunable laser 44 is used as the excitation source for the absorption spectral signals of different gas molecules. Different types of lasers are selected by setting the wavelength range of the fingerprint absorption spectrum center of different detection objects according to the spectral range. Using the wavelength modulation spectral technology in Table 1 (Table 2, or Table 3), the tunable laser 44 can generate lasers of multiple wavelengths, each wavelength corresponding to the absorption peak of a characteristic gas in the mixed gas of the soap bubble to be tested in the diffuse reflection cell. The tunable laser 44 will achieve extremely high-speed modulation through its front panel RF interface.

[0195] The tunable laser 44 described in this technical solution is located at the bottom right side of the spherical absorption cell 5 and at the front end of the laser driver 43. The tunable laser 8-2 is composed of N (N≥2) deuterium-tungsten halide combined light sources, integrating a radio frequency excitation deuterium lamp source for ultraviolet light and a tungsten halide source source for visible / near-infrared light. The lasers in the tunable laser array receive corresponding scanning signals and then generate and provide ultraviolet / visible / near-infrared laser beams of corresponding wavelengths, as well as continuous output spectra in the ultraviolet / visible / near-infrared bands. Each combined light source can produce a stable output spectrum of ~200-1100nm.

[0196] The optocoupler 45 is located on the upper right side of the spherical absorption cell 5, at the front end of the tunable laser 44, and its input end is connected to N lasers 44 respectively. The optocoupler 45 couples each beam into a single beam, and its output end is connected to the collimating lens 46. It is used to receive ultraviolet (infrared) laser beams of the corresponding wavelength band, couple them into a single ultraviolet (infrared) laser beam, and then the collimating lens 46 collimates and outputs the coupled beam to the spherical absorption cell 5. The incident light undergoes an absorption process in the spherical absorption cell 5 by interacting with the gas to be measured.

[0197] All collimating lenses 46 are disposed on the upper right side of the spherical absorption cell 5 and at the light output port of the optocoupler 45. The collimating point of the collimating lens 46 is aligned with the upper through hole 26 at the upper right end of the spherical absorption cell 5. The laser beam of the ultraviolet / visible / near-infrared laser 44 is collimated and output into the spherical absorption cell 5 through the adjustment of the collimating lens 46, directly transmitting through the gas sample to be tested and forming continuous diffuse reflection.

[0198] The focusing lenses 47 are all located on the lower left side of the sphere of the spherical absorption cell 5 and at the light inlet of each photodetector 48. Their focusing points are aligned with the lower through-hole 27 at the lower end of the spherical absorption cell 5. The light beam undergoes multiple diffuse reflections of the gas sample to be tested in the spherical absorption cell 5 to generate resonance, which causes a change in the emitted laser spectrum. After being focused, the light beam is transmitted to the photodetector 48 for collection and photoelectric conversion.

[0199] The photodetectors 48 are all located on the lower left side of the spherical absorption cell 5 and at the rear end of the focusing lens 47. The wavelength response range of the photodetectors 48 can simultaneously cover the wavelength output range of the tunable laser 44. They are used to detect the corresponding laser after penetrating the gas sample to be tested in the spherical absorption cell 5, and the exponential decay curve of its light signal intensity over time (the circuit control unit 8-7 turns off the optocoupler 45) to generate spectral data.

[0200] The circuit control unit 49 includes an intelligent control module, an ID card reader 3-1, a body temperature sensor 3-2, a video sensor 3-3, a computer module 3-4, a communication module 3-5, a social security card reader 3-6, a human-machine interaction unit 4, an electric heating element 28-1, a semiconductor cooling element 28-2, an exhaust fan 29, a spiral air curtain 30, a blower fan 31, a temperature and humidity controller 32, a power regulator module 33, a monitoring module 39, an airflow sensor 40, a vacuum pump 41, a laser driver 43, a tunable laser 44, and a photodetector 48. The intelligent control module controls the above electrical appliances to turn on or off by outputting control signals, thereby controlling the continuous gas analysis process.

[0201] The signal acquisition and processing unit 9 (such as...) Figure 1 As shown, the sensor is positioned on the lower left side of the spherical absorption cell 5 and at the rear end of the photodetector 45. The output of the photodetector 45 is connected to the signal acquisition and processing unit 9, and the output of the signal acquisition and processing unit 9 is connected to the computer module 3-4. The amplitude information is extracted from the spectral signal of the laser output attenuation to the set intensity time interval to determine the parameters of the concentration of the target characteristic gas, thereby detecting the corresponding disease information in the trace gas to be tested.

[0202] The computer module 3-4 (e.g.) Figure 1 As shown, the detector is housed in the top cover 3, which contains a software-programmed digital signal output module. The digital signal output module includes a sawtooth wave for driving laser wavelength tuning and a sine wave for laser wavelength modulation. The digital signal output module transmits signals through multiple channels.

[0203] The communication modules 3-5 (e.g.) Figure 1The detector (as shown) is installed in the top cover 3 and is used to send the information of the detection results collected by the detector to the customer's mobile phone via the GSM network for real-time information, and to send it to the big data center via the Internet for storing personal medical records and historical data.

[0204] In a specific embodiment of the present invention (please refer to Table 1), the ultraviolet spectral deuterium lamp light source penetrates the soap bubble gas in the spherical absorption cell and is used to detect volatile VOC gases such as isoprene, acetone, and nitric oxide in Table 1, and methanethiol in Table 2. By detecting a variety of characteristic gases, the condition of the respiratory organs of the test subject can be determined, and early lung cancer can be detected!

[0205] The tungsten halide light source of the infrared spectrum penetrates the soap bubble gas in the spherical absorption cell and is used to detect volatile VOC gases such as carbon monoxide and ethane in Table 1, and hydrogen sulfide, ammonia, and methane in Table 2. By detecting a variety of characteristic gases, the condition of the digestive tract organs of the test subject can be determined, and the presence of early-stage stomach cancer or intestinal cancer can be detected!

[0206] In this embodiment (see Table 1): The subject sits facing the detector. After turning on the detector, they insert a disposable mouthpiece 38-1 into the front insertion module 38-5, and then blow air forcefully through the mouthpiece 38-1 with their lips. The exhaled air is filtered by the absorbent cotton 37-1 in the front insertion module 38-5 to remove H2O, and then CO2 is adsorbed by the porous material 37-2 in the rear insertion module 38-6. After passing through the airflow sensor 40 to control the air intake, the air enters the horn-shaped bubble outlet 36-5, and then gradually blows out soap bubbles with a diameter of φ100 mm, which then drift into the spherical absorption pool 5 for detection.

[0207]

[0208] In a specific embodiment of the present invention (see Table 2): After the subject faces the detector and starts the detector in a seated position, one end of a disposable air tube is inserted into the front connector module 38-5, and the other end of the air tube is connected to the mouthpiece 38-1 and inserted into the mouth. The vacuum pump draws in the air. The air drawn out is filtered by the absorbent cotton 37-1 in the front connector module 38-5 to remove H2O, and then CO2 is adsorbed by the porous material 37-2 in the rear connector module 38-6. After passing through the airflow sensor 40 to control the air intake, the air enters the horn-shaped bubble outlet 36-5, and then gradually blows out soap bubbles with a diameter of φ100 mm, which float into the spherical absorption pool 5 for detection.

[0209]

[0210] This case, based on the spherical suspended gas detector and detection method of the first embodiment, employs another "tunable mid-infrared quantum cascade laser" to detect a COVID-19 biomarker by detecting four volatile VOCs in the breath: ethyl butyrate, butyraldehyde, isopropanol, and acetone. The detection method (briefly described) is as follows:

[0211] To eliminate interference from other gases in the oral cavity, the tunable mid-infrared quantum cascade laser emits lasers of different wavelengths (see Table 3). The concentration of substances in the gas can be calculated using a computer unit, determining the concentrations and values ​​of ethyl butyrate, butyraldehyde, isopropanol, and acetone present in the gas. Since the concentration of ethyl butyrate in the breath of COVID-19 patients is higher than that of healthy individuals, while the concentrations of butyraldehyde, acetone, and isopropanol are lower, testing the concentrations of these substances in exhaled breath is used to determine whether the subject has contracted COVID-19.

[0212] In one specific embodiment of the present invention (see Table 3), this invention employs a laser array and various components of leaked gases from the human body.

[0213] The real-time collaborative detection method for content establishes a single quantitative relationship between the laser wavelength and the absorption peak wavelength of the gas to be measured, thereby detecting the direct relationship between a certain gas molecule (or several molecules) in the outlet gas and a certain disease (or several diseases) (cancer).

[0214] In this embodiment (please refer to Table 3): After the subject and the detector are seated back-to-back and the detector is activated, one end of an air tube is inserted into the front insertion module 38-5, and the other end of the air tube is connected to a semi-elliptical plastic suction sleeve 38 inserted into the groin of the subject's back and buttocks. After the subject exhales, the vacuum pump 41 draws in air for sampling. After exhalation, H2O is filtered out by the absorbent cotton 37-1 in the front insertion module 38-5, and CO2 is adsorbed by the porous material 37-2 in the rear insertion module 38-6. After passing through the airflow sensor 40 to control the air intake, the air enters the horn-shaped bubble outlet 36-5, and then gradually blows out soap bubbles with a diameter of φ100 mm, which float into the spherical absorption pool 5 for detection.

[0215]

[0216] Nitric oxide (NO) is a biological regulator produced by the body and plays an important role in various physiological and pathological processes. Clinical medicine has proven that CO and NO are biomarkers for respiratory infections and asthma.

[0217] Detecting diseases, tumors, and halitosis through exhalation is based on the fact that unique volatile organic compounds (VOCs) produced by the metabolism of healthy and cancerous cells, as well as by the metabolism of oral (intestinal) flora and proteins, can be exhaled. The production mechanism of cancer-related VOCs may involve early-stage cancerous changes at the gene and cellular levels, leading to metabolic alterations in cellular enzymatic pathways.

[0218] Some patients with peptic ulcers, chronic gastritis, or functional dyspepsia may experience halitosis and the emission of abnormally foul-smelling gases. The main substances present in the body are volatile sulfur compounds, such as hydrogen sulfide (H₂S), ethanethiol, ethyl thiocyanate, diethyl disulfide, dimethyl sulfide ((CH₃)₂S), and methanethiol (CH₃SH or methanethiol). Some Gram-negative bacteria are associated with the production of volatile sulfur compounds from sulfur-containing substrates in food or saliva, such as *Fokiebacterium foetida*, *Porphyromonas gingivalis*, *Actinomyces actinomycetes*, and *Prevotella intermedia*.

[0219] Helicobacter pylori is more likely to cause bad breath and stomach ulcers, and it also produces foul-smelling gases such as ammonia, hydrogen sulfide, and methanethiol by decomposing urea. Methanethiol is a foul-smelling substance produced when organic components such as amino acids and methionine are decomposed. Hydrogen sulfide and methanethiol are important causes of bad breath. After reacting with stomach acid in the stomach, Helicobacter pylori decomposes into ammonia, which is a biomarker of Helicobacter pylori infection. It is associated with chronic gastritis, acute gastritis, and duodenal ulcers. Legumes contain specific carbohydrates that cannot be digested by the small intestine. After being processed in the large intestine, they produce gases such as hydrogen and methane. Methane is associated with intestinal diseases such as colorectal cancer, diverticulosis, irritable bowel syndrome, and inflammatory bowel disease.

[0220] Medical research shows that human exhaled air contains a mixture of nitrogen (N2), oxygen (O2), carbon dioxide (CO2), water vapor (H2O), volatile organic compounds (such as isoprene, ethane, pentane, and acetone), and other typical non-volatile substances, as well as inert gases. It also contains many other gases with characteristic VOC concentrations in the ppm or even ppb range. In fact, human exhaled air contains thousands of molecules released into the air, which can provide a wide range of information about diseases. Normally, endogenous VOCs in the human body flow from organs to the lungs via the bloodstream, enter the alveoli after gas exchange, and their concentration is not only quantitatively related to the corresponding gas molecules in the blood but also to the concentration of other molecules in the blood. This means that the composition and concentration of exhaled (intestinal or skin) air can reflect the body's metabolic function and disease state, and is ultimately expelled from the body through the mouth, nose, intestines, or skin.

[0221] Therefore, in the implementation of this case:

[0222] If the concentration of ammonia exhaled by a human body is around 2000 ppb (healthy people exhale about 200-500 ppb), it can be determined (which has been clinically verified) that the person is a patient with end-stage renal disease (the ammonia concentration after dialysis can reach between 200 ppb and 600 ppb).

[0223] Detecting acetone concentrations above 1.8 ppm, a hallmark of VOCs (healthy individuals exhale approximately 0.3-0.9 ppm), has become a highly effective and rapid method for the quick diagnosis of diabetes.

[0224] Detecting trace amounts of nitrogen oxides, acids, and ketones in exhaled (overflowing) breath can detect kidney and liver dysfunction, hepatic encephalopathy, asthma, and ulcer-related diseases.

[0225] Detecting carbon disulfide, acetylene, butane, and pentane in exhaled breath can help detect neurological diseases. The exhaled breath of lung cancer and early-stage breast cancer patients contains high concentrations of VOCs, namely acetone (C3H6O), isoprene (C5H8), and nitric oxide (NO), with concentrations of 0-2 ppmv, 50-200 ppbv, and 10-50 ppbv, respectively. Exhaled formaldehyde (formalin) can also serve as a biomarker for cancer diagnosis.

[0226] Human skin has three major glands: sweat glands, sebaceous glands, and serous glands, containing a total of 271 chemical substances. Armpit odor has 135 components, of which 30-40 can be identified. Based on their properties, these substances are categorized into hydrocarbons (H), aromatic compounds (AR), aldehydes (ALD), esters (ES), alcohols (ALC), ketones (K), ethers (ETH), phenols (PH), acids (AC), heteroatoms (HA), and halogenated hydrocarbons (HH). Using police dogs to identify and track human odor, and using instruments to analyze and identify human odor, is legally termed "olfactory discrimination"; smelling body odor to regulate emotions and detect diseases is medically termed "olfactory diagnosis." Human skin odor is also influenced and interfered with by factors such as genes, diet, emotions, environment, time, and endocrine function, causing variations in its composition and concentration. Therefore, each person has a unique and distinctive human odor, which can be detected by referring to the chemical names listed above.

[0227] In practical applications, this technical solution employs a spherical suspended gas detector method, which includes the following steps:

[0228] Step 1, Information Preparation: First, we will establish separate databases of body odor (oral cavity, body surface, excretion) for healthy individuals and databases of body odor for individuals with abnormalities, and establish a standard model for screening disease information sets by detecting body odor.

[0229] Step 2, Physical preparation: The subject sits upright in the seat opposite the gas detector until breathing is stable.

[0230] Step 3, Power-on preparation: The circuit control unit 49 is started and controlled respectively.

[0231] The human-machine interaction unit 4, temperature and humidity controller 32, power regulator module 33, circuit control unit 9, and voltage regulator 10 are described.

[0232] Step 4, Pipeline Preparation: Before extracting the soap bubble gas sample, purge the pipeline.

[0233] The vacuum pump 41 is started and the filtered gas is introduced into the vacuum pump 41, the airflow sensor 40, the plug-in module 38-5, the horn bubbler 36-5, and the spherical absorption cell 5 through the activated carbon filter layer 19 to clean the residual gas in the sample introduction unit 7; at the same time, the exhaust fan 29 is started to clean and exhaust the gas remaining in the spherical absorption cell 5.

[0234] Step 5, soap preparation: Turn on the soap heater 36-3, and when it reaches 33℃, it will gradually penetrate and drip into the foaming loop 36-4;

[0235] Step 6, Plugin Preparation: Based on the requirements of option 4 of the human-computer interaction unit, select the required detection method and corresponding connector.

[0236] ① Insert the plug of the disposable mouthpiece 38-1 into the front plug module 38-5, and then hold the mouthpiece 38-1 tightly and blow air forcefully (see the first embodiment and Table 1 for details);

[0237] Alternatively, insert the plug of the disposable suction tube into the front connector module 38-5, and then hold the disposable suction tube tightly in your mouth so that the vacuum pump 41 can draw air from the cavity (see the second embodiment and Table 2 for details).

[0238] Alternatively, ③ insert the plug of the vacuum tube sleeve 38-4 into the front plug module 38-5, and insert the other end of the vacuum tube sleeve 38-4 into the groin (or armpit, hair, or skin) when sitting, so that the vacuum pump 41 can extract the body odor (see the third embodiment and Table 3 for details).

[0239] Step 7, Sample Preparation: The circuit control unit 49 is then started and controlled respectively.

[0240] (a) Using the sampling method of the first type [or ②, ③] above, the water vapor and carbon dioxide in the gas sample to be tested are filtered out successively through the water-absorbing cotton 37-1 in the plug-in module 38-5 and the porous filter material 37-2 in the plug-in module 38-6;

[0241] (b) Gradually introduce the gas sample to be tested into the horn-shaped bubbling port 36-5, push the soap film on the bubbling loop 7-4 to continuously bubble and enlarge, and after the airflow sensor 40 senses that the preset air intake volume has been reached to form a spherical soap bubble prototype, immediately cut off the pipeline to stop the air intake.

[0242] (c) The mini vacuum pump 7-5 is immediately started to quickly input quantitative filtered gas, which is used to purge the gas remaining in the pipeline of the sample injection unit 7, and at the same time to help the gas sample of the soap bubble to be tested, which has been formed into a diameter of about φ100 mm, drift towards the center of the spherical absorption cell 5.

[0243] Step 8, Suspension Preparation: The circuit control unit 49 starts and controls the module 6 respectively.

[0244] Before the soap bubbles are introduced, the temperature and humidity controller 32 regulates the electric heating element 28-1 and the semiconductor cooling element 28-2 to ensure the temperature and humidity inside the spherical absorption pool 5.

[0245] The sample is introduced into the soap bubble, and the airflow from the two fans on the left and right pushes the soap bubble sample into the center of the spherical absorption pool 5.

[0246] After the soap bubbles are introduced, the spiral air curtain 31 generates an upward spiral wind force, which lifts and suspends the soap bubble gas sample.

[0247] Step 9, Optical Path Preparation: The circuit control unit 49 will activate the tunable laser 44.

[0248] After soap bubbles are introduced, the monitoring module 39 in the spherical absorption pool 5 immediately sends a signal to the tunable laser 44, so that the laser can be coupled into the spherical absorption pool 5 after being collimated by the collimating lens 46.

[0249] Step 10, Detection Preparation: The circuit control unit 49 controls the tunable laser 44.

[0250] The frequency output by the tunable laser 44 resonates with the spherical absorption cell 5. The incident laser beam continuously passes through the uniform light field formed by direct and diffuse reflection within the spherical absorption cell 5 and interacts with the gas to be tested.

[0251] The laser transmitted from the spherical absorption cell 5 is focused by the focusing lens 47 onto the photodetector 48. The photodetector 48 converts the received modulated laser signal into an electrical signal and sends it to the demodulation module for demodulation. The signal is then sent to the corresponding module for processing and calculation.

[0252] The gas sample to be tested is analyzed using laser detection technology to obtain the characteristic frequency peaks of each absorption spectrum. The characteristic peak frequencies are then imported into computer module 3-4. The concentration of the gas to be tested in the exhaled gas is measured by the absorption peaks of the obtained spectral wavelengths.

[0253] Step 11, Verification Preparation: Compare the body odor of the subject with the database and conduct disease screening. Based on the odor leaked from the subject's body, determine what disease or health problem the subject has.

[0254] Step 12, Preparation for Presentation: The computer module 3-4 will input the "detection and comparison results" into the human-computer interaction unit 4, and through video display and voice announcement, inform the subject of the possible health problems and diseases, as well as suggest personalized health management plans, by presenting the detection results and conclusions of the collected gas through video display and voice announcement.

[0255] Step 13, Data Preparation: The communication modules 3-5 will send the collected detection results to the customer's mobile phone via the GSM network to understand the real-time situation, and send them to the big data center via the Internet to save personal medical records and historical data.

[0256] Step Fourteen, Cleaning and Preparation: After the detection is completed, the extraction and recovery process of the soap bubble waste liquid and sample waste gas will begin.

[0257] The power adjustment module 33 will increase the power and increase the airflow of the exhaust fan 29 to quickly exhaust the gas sample. The leaked waste gas due to the rupture of soap bubbles is adsorbed and desorbed by the activated carbon filter layer 19, and the ruptured soap bubbles are recovered from the fall.

[0258] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0259] sequence name Similar products (using the same method) The product (method used) in this case The effect of this case 1 Absorption cell characteristics Spheres and cylinders (as a whole) Spherical shell assembly (outer shell + inner cover) More compact structure 2 Absorption tank material Stainless steel (polished) Foam ceramics (open-cell three-dimensional mesh skeleton) Durable and corrosion resistant 3 Absorption tank accessories Multiple rearview mirrors (complex adjustment) 3D mesh natural reflection (no debugging required) Simple and convenient 4 Absorption tank cleaning Each time (cleaning, disinfection, and drying) No contact required No need to clean the pool 5 Optical path characteristics Direct light, reflection (specular reflection) Direct sunlight, diffuse reflection (diffuse reflection from the enclosure) Longer optical path 6 Sampling sites Mouth and nose (blowing, exhaling) Mouth, nose, intestines, skin (blowing, breathing) More collection surfaces 7 Sampling method Air bags, absorption tanks (air blowing) Soap bubble wrap (soap bubble blowing) Strong anti-interference ability 8 Sample noise reduction Dual adsorption cell (background subtraction method) Filter media, modulation (adsorption, wavelength, band) Higher signal-to-noise ratio 9 Sample residence Fill the absorption tank (gas filling) Soap bubbles, trace amounts (spiral fan + top exhaust) Floating and in the middle 10 Sample input and output Pump valve (suction) Air pressure, fan, exhaust (blowing, suction) Drifting in and falling 11 Detection range Single item (single gas or disease) Multiple factors (various gases and cancer + viruses) Cancer and viruses 12 Detection mode Separate measurements (gas bags, gas pools) Centralized measurement (trace gas, multi-spectral) Get the results directly 13 Detection efficiency Disinfection, 50 minutes (intermittent) The test is complete in 10 minutes (continuous). High efficiency and low cost 14 Detection effect Tumors 6cm and above can be detected (hospital) This detector can detect tumors from 1 to 6 cm. Smaller and earlier 15 Project Investment Nitrogen gas + massive absorption pool Liquid soap + mini absorption tank Simple and low cost

[0260] This invention employs a spherical gas absorption cell, which makes the overall structure of the spectral system simpler and more compact, significantly reducing its size, weight, power consumption, and cost. It has the advantages of high precision, short time, low cost, long optical path, small volume, simple structure, good stability, strong practicality, economic applicability, and easy mass production. It can greatly improve medical diagnosis efficiency and has significant research and development value and considerable development potential.

[0261] This invention uses mid / near infrared bands to detect gases leaking from the human body, avoiding the influence of water vapor, carbon dioxide, etc.

[0262] The soap bubble used in this invention is formed by a thin soap film, similar to transparent cellophane. When a laser beam hits the soap film, a large amount of refraction and reflection will occur both inside and outside the film.

[0263] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0264] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution device.

[0265] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0266] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0267] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0268] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0269] The spherical suspended gas detector and its detection method of the present invention employ a spherical gas absorption cell, which makes the overall structure of the spectral system simpler and more compact, significantly reducing volume, weight, power consumption and cost. It has the advantages of high accuracy, short time, low cost, long optical path, small volume, simple structure, good stability, strong practicality, economic applicability and easy mass production, which can greatly improve medical diagnosis efficiency and has great research and development value and considerable development space.

[0270] In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A spherical suspended gas detector, characterized in that, The gas detector includes: The base (1), housing (2) and top cover (3) are elliptical in shape. The housing (2) is hollow and is fixedly mounted on the base (1). The top cover (3) is fitted on the top of the housing (2). The casing (2) is provided with a human-machine interaction unit (4), and a spherical absorption cell (5) is provided inside the casing (2). A suspension unit (6) is provided inside the spherical absorption cell (5). A sample injection unit (7) is also provided on the front side of the spherical absorption cell (5). Optical path detection units (8) are provided on both the left and right sides of the spherical absorption cell (5). A signal acquisition and processing unit (9) and a voltage regulator unit (10) are also arranged side by side on the left side of the spherical absorption cell (5). The spherical absorption cell (5) is a low-temperature controlled absorption cell, consisting of a light reflector (11) with an inner spherical shell (12). The light reflector (11) is made of polyurethane foam ceramic material with an open three-dimensional mesh skeleton structure, and an inlet (11-1) is provided on the lower front side. The inlet (11-1) is used to detect various leaked gases from the human body. The spherical shell (12) is a precision-cast sphere made of aluminum alloy material, which includes an upper hemisphere (13) and a lower hemisphere (14). Furthermore, a first concave-convex groove (15) and a second concave-convex groove (16) are respectively provided on the plane at the diameter meshing point of the upper hemisphere shell (13) and the lower hemisphere shell (14). The first concave-convex groove (15) and the second concave-convex groove (16) are used to tightly fit the upper hemisphere shell (13) and the lower hemisphere shell (14). A first concave gripper (17) is provided above the first concave-convex groove (15), and a second concave gripper (18) is provided below the second concave-convex groove (16). Furthermore, an activated carbon filter layer (19) is provided at the top center of the upper hemisphere shell (13), and a circular exhaust port (20) is provided above the activated carbon filter layer (19); a movable hollow metal bracket (21) is provided on the lower hemisphere shell (14), and the hollow metal bracket (21) is used to support and fix the light reflector (11); an air inlet (22) with an activated carbon layer filtering air is provided on the back of the lower hemisphere shell (14), and the air inlet (22) is used to supply air to the upper hemisphere shell (14). The spherical absorption pool (5) draws in filtered gas; a recovery port (23) is provided at the center of the bottom of the lower hemisphere shell (14), the recovery port (23) is used to recover the waste detection sample, and a soap liquid recovery box (24) is also provided at the bottom of the recovery port (23); a support frame (25) is also provided on the lower side of the bottom of the lower hemisphere shell (14), the support frame (25) is used to fix the spherical absorption pool (5) on the base (1) of the gas detector; The levitation unit (6) includes an electric heating element (28-1), a semiconductor cooling element (28-2), an exhaust fan (29), and a lifting fan (30); wherein, The electric heating element (28-1) and the semiconductor cooling element (28-2) are used to adjust the temperature and humidity inside the spherical absorption cell (5); The exhaust fan (29) is located between the activated carbon filter layer (19) and the circular exhaust port (20) of the upper hemispherical shell (13) to control the lifting and suspension of the gas sample to be tested; The lifting fan (30) is located on the left and right sides of the lower part of the lower hemispherical shell (14) to provide an upward supporting force to the gas sample to be tested; The sample introduction unit (7) includes a soap bubble module (36), wherein, The soap bubble module (36) specifically includes: a soap solution storage unit (36-1), a soap solution slow-penetrating device (36-2), a soap solution heater (36-3), a foaming loop (36-4), and a trumpet-shaped foaming port (36-5); the soap solution storage unit (36-1) is disposed on the spherical absorption pool (5) and connected to the soap solution slow-penetrating device (36-2); the lower end of the soap solution slow-penetrating device (36-2) is connected to the foaming loop (36-4); the soap solution heater (36-3) is a graphene heating film attached to the soap solution slow-penetrating device (36-2); the foaming loop (36-4) is attached to the trumpet-shaped foaming port (36-5). The soap liquid storage device (36-1) is an irregularly shaped tank with a concave arc shape at the bottom that fits against the outer arc of the upper hemisphere shell (13). Both sides are flush with the diameter of the spherical absorption pool (5). The soap liquid slow-penetrating device (36-2) is a flat plastic part arranged in two rows. The foaming loop (36-4) is a leaf-shaped structure with the loop spreading inward, which is used to provide guidance and support for the soap liquid film penetration and formation. The trumpet-shaped foaming port (36-5) is located on the side wall of the lower hemisphere shell (14).

2. The spherical suspended gas detector according to claim 1, characterized in that, The top cover (3) is also equipped with an ID card reader (3-1), a body temperature sensor (3-2), a video sensor (3-3), a computer module (3-4), a communication module (3-5), and a social security card reader (3-6). The ID card reader (3-1) and the social security card reader (3-6) are used to verify the identity of the person being tested. The body temperature sensor (3-2) is used to detect the body temperature data of the person being tested. The video sensor (3-3) is used to detect the physical characteristics of the person being tested. The computer module (3-4) and the communication module (3-5) are used to send the acquired information to the user terminal and the cloud big data center for storage.

3. The spherical suspended gas detector according to claim 1, characterized in that, The human-computer interaction unit (4) is embedded on the front surface of the outer side of the housing (2). It consists of a touch control screen (4-3) equipped with a speaker module (4-1) and a voice module (4-2). It is used to display the various function operation interfaces of the current gas detector and to display and broadcast the available options and the corresponding function detection results.

4. The spherical suspended gas detector according to claim 1, characterized in that, The spherical absorption cell (5) has an upper through hole (26) on the upper right side of the upper hemisphere shell (13). The optical aperture of the upper through hole (26) has an incident angle of 15° to satisfy the multiple reflection processing of the light reflector (11). The upper through hole (26) is used to emit incident laser from different angles. The spherical absorption cell (5) has a lower through hole (27) on the lower left side of the lower hemisphere shell (14). The incident laser is diffusely reflected multiple times by the diffuse reflection surface of the polyurethane foam ceramic material inside the spherical absorption cell (5) and then converges to the lower through hole (27) and is emitted.

5. The spherical suspended gas detector according to claim 1, characterized in that, The suspension unit (6) further includes a spiral air curtain (31), which further includes an air curtain tube (31-1), a three-way connector (31-2), a small through hole (31-3), a rotating windshield (31-4), an air pump (31-5), and a rotating component (31-6); wherein, The air curtain tube (31-1) is formed by inserting four hollow arc-shaped bends into four T-joints (31-2). The edge interface of the T-joints (31-2) is used to connect to the air outlet of the air pump (31-5). The side plane and outer surface of the air curtain tube (31-1) and the T-joints (31-2) are respectively provided with two rows of small through holes (31-3) that are equidistantly distributed and obliquely arranged towards the outlet along the tangent of the arc-shaped bend. The rotating windshield (31-4) is a semi-circular rotating module, which is set on the air curtain. Inside the circular tube (31-1), rotation control is used to prevent the spiral air curtain (31) from blocking the flow of the sample to be tested to the center of the spherical absorption pool (5); the air pump (31-5) is used to provide the wind force to generate the air curtain for the spiral air curtain (31); the air curtain circular tube (31-1), the three-way connector (31-2), the rotating wind deflector (31-4) and the air pump (31-5) are all sleeved and fixed on the hollow annular plane of the rotating component (31-6) and are integrally fixed on the hollow metal bracket (21).

6. The spherical suspended gas detector according to claim 1, characterized in that, The suspension unit (6) further includes a temperature and humidity controller (32) and a power regulator module (33). The temperature and humidity controller (32) and the power regulator module (33) are both located on the left side of the spherical absorption pool (5). The temperature and humidity controller (32) adjusts the temperature and humidity values ​​in the spherical absorption pool (5) by controlling the electric heating element (28-1) or the semiconductor cooling element (28-2), and displays the values ​​through the LCD digital panel. The power regulator module (33) controls the rise and fall of the internal temperature of the spherical absorption pool (5) by monitoring the control data obtained by the temperature and humidity controller (32), and controls the working power of the exhaust fan (29) when the gas detector reaches the exhaust stage to accelerate the exhaust of the sample waste gas.

7. The spherical suspended gas detector according to claim 1, characterized in that, The sample introduction unit (7) further includes: a gas path filter material (37) and a gas path accessory (38), wherein the gas path filter material (37) and the gas path accessory (38) are combined and disposed inside the horn-shaped bubbling port (36-5); wherein, The gas filter material (37) specifically includes several absorbent cottons (37-1) and a porous material (37-2). The absorbent cottons (37-1) are used to adsorb water vapor in the filtered gas, and the porous material (37-2) is a metal-organic porous material FJI-H14, which is used to adsorb carbon dioxide in the filtered gas. The air circuit accessory (38) specifically includes a disposable nozzle (38-1), a disposable plastic stop valve (38-2), a plastic check valve (38-3), and an air extraction sleeve (38-4). The disposable nozzle (38-1) is located on the upper part of the absorbent cotton (37-1). The disposable plastic stop valve (38-2) is located on the front plug-in module (38-5) of the air circuit accessory (38), and the front plug-in module (38-5) is connected to the absorbent cotton (37-1). The plastic check valve (38-3) is located on the rear plug-in module (38-6) of the air circuit accessory (38), and the rear plug-in module (38-6) is connected to the porous material (37-2).

8. The spherical suspended gas detector according to claim 1, characterized in that, The sample introduction unit (7) further includes a monitoring module (39), a gas flow sensor (40), and a vacuum pump (41), wherein, The monitoring module (39) is a network monitoring 1080P camera used to monitor the operation status of the soap bubble gas sample in the spherical absorption pool (5) at different time stages. The airflow sensor (40) can limit the amount of gas input to control the flow rate of the gas input by the subject in real time, thereby controlling the volume of the soap bubble gas sample. The vacuum pump (41) is provided with an air intake port and an exhaust port. The air intake port is used to draw in the sample gas to be tested, and the exhaust port is used to remove the sample gas in the channel connected to the horn bubble port (36-5).

9. The spherical suspended gas detector according to claim 4, characterized in that, The optical path detection unit (8) includes: a laser driver (43), a tunable laser (44), an optocoupler (45), a collimating lens (46), a focusing lens (47), and a photodetector (48), wherein, The laser driver (43) adopts a time-division driving method and is located at the bottom right side of the spherical absorption cell (5). The output end of the laser driver (43) is connected to the input control end of several tunable lasers (44) to drive the tunable lasers (44) to detect the laser intensity of the gas to be detected. Several tunable lasers (44) are disposed at the bottom right side of the spherical absorption cell (5), and each tunable laser (44) is connected to a corresponding collimating lens (46), and each collimating lens (46) is disposed on the optocoupler (45). The optocoupler (45) is located on the upper right side of the spherical absorption cell (5) and is used to collimate and output the light beam after optical path coupling through the collimating lens (46) into the spherical absorption cell (5). Several collimating lenses (46) are disposed on the upper right side of the spherical absorption cell (5) and on the light output port of the optocoupler (45). The collimating point of the collimating lens (46) is aligned with the upper through hole (26) on the upper right side of the spherical absorption cell (5) to collimate the laser beam output by coupling into the spherical absorption cell (5). The laser output by the tunable laser (44) will be adjusted by the collimating lens (46). Several of the aforementioned focusing lenses (47) are disposed on the lower left side of the spherical absorption cell (5) and the light inlet of the corresponding photodetector (48), and the focusing point of the focusing lens (47) is aligned with the lower through hole (27) on the lower left side of the spherical absorption cell (5). Several photodetectors (48) are disposed at the rear end of the corresponding focusing lens (47) for detecting laser light penetrating the interior of the spherical absorption cell (5).

10. The spherical suspended gas detector according to claim 9, characterized in that, The signal acquisition and processing unit (9) has multiple digital input channels and analog output channels. The digital input channels are used to convert the analog drive signals generated by the computer module (3-4) into digital signals and input them into the tunable laser (44). The analog output channels are used to provide signal input to the photodetector (48). The voltage regulator unit (10) is used to provide a stable voltage source for the gas detector.

11. A method for detection and processing using a spherical suspended gas detector, the method comprising the spherical suspended gas detector according to any one of claims 1 to 10, characterized in that, The method includes the following steps: (1) Establish a standard model for screening disease information sets by detecting body odor, and establish a healthy human body odor database and an abnormal human body odor database in the standard model; (2) The subject should sit facing the spherical suspended gas detector until breathing is stable; (3) Start the human-computer interaction unit (4), the floating unit (6), the signal acquisition and processing unit (9) and the voltage regulator unit (10); (4) Empty the internal pipes of the detector, start the vacuum pump (41), and input the filtered gas into the vacuum pump (41), airflow sensor (40), front plug-in module (38-5), horn bubbler (36-5) and spherical absorption cell (5) in the sample injection unit (7) through the activated carbon filter layer (19) to clean the residual gas in the sample injection unit (7); at the same time, start the exhaust fan (29) to clean and exhaust the gas remaining in the spherical absorption cell (5) and remove it completely. (5) Start the soap liquid heater (36-3) of the soap bubble module (36) and gradually drip the soap liquid onto the foaming loop (36-4) when it reaches 33°C; (6) Select the required detection method and corresponding connector according to the options currently displayed by the human-computer interaction unit (4); (7) Prepare the gas sample to be tested; (8) The soap bubble gas sample is suspended by the suspension unit (6); (9) After the soap bubbles are introduced, the monitoring module (39) in the spherical absorption pool (5) immediately sends the monitoring signal to the tunable laser (44), so that the laser can be coupled into the spherical absorption pool (5) after being collimated by the collimating lens (46). (10) The incident beam entering the spherical absorption cell (5) forms a uniform light field through direct and diffuse reflection and interacts with the gas to be tested; the laser emitted through the spherical absorption cell (5) is multi-path focused by the focusing lens (47) to the photodetector (48) for optical path detection processing, and the calculated characteristic peak frequency is imported into the computer module (3-4). (11) The collected body odor of the test subject is compared and verified with the healthy human body odor database and the abnormal human body odor database; (12) The comparison results are sent to the human-computer interaction unit (4) via the computer module (3-4) and communicated in the form of video or voice. (13) The collected detection results and verification results are sent to the user terminal via the GSM network through the communication module (3-5), and sent to the big data center for data storage via the data network; (14) After the detection is completed, the spherical suspended gas detector will automatically load the extraction and recovery program of soap bubble waste liquid and sample waste gas to carry out environmental cleaning.

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