Portable lung function detector
By employing a MEMS hot-film flow sensor and a fluid dynamics simulation airflow channel, the problems of large size, easy wear and tear, and low accuracy of portable pulmonary function instruments have been solved, achieving portable, low-cost, and high-precision pulmonary function testing.
Patent Information
- Application Number
- CN202422619945.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing portable pulmonary function instruments use turbine sensors that are large, easily worn, have low accuracy, are expensive, and have poor sealing.
Employing a MEMS hot-film flow sensor and an airflow channel designed according to fluid dynamics simulation, combined with a circuit control board and Bluetooth module, it achieves compact portability and high-precision measurement.
It achieves a compact structure, low cost, and high precision measurement for portable pulmonary function testing devices, suitable for rapid assessment of lung health.
Smart Images
Figure CN223601451U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a lung function detection equipment, concretely relates to a portable lung function detector. BACKGROUND
[0002] The lung function instrument currently used in market uses turbine type, pressure difference type, ultrasonic type sensor to test human exhaled gas flow rate, and the device volume is relatively large, is usually applied to hospital or physical examination place, needs to configure special detection personnel, data display or printing equipment. There are some portable lung function instruments in market, which usually adopt turbine type sensor, and the working principle is to utilize airflow to drive turbine blade rotation, measures impeller rotating speed through photoelectric pair tube or blade pair magnetic field cutting electric signal when the blade rotates, and measures flow rate. The turbine sensor volume is relatively large, and the turbine blade is fixed through precision bearing, which can cause abrasion after long-term use, influences detection precision, and needs to be replaced after long-time use; the measurement range of turbine sensor is relatively wide, and the detection precision is low for extremely low flow rate. The portable lung function instrument using turbine sensor has relatively large overall volume, and the overall sealing waterproofness is poor for facilitating installation of turbine sensor, and the price is also relatively expensive. SUMMARY
[0003] The utility model discloses a portable lung function detector, which is portable, compact and low in cost.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0005] A portable lung function detector, the detector includes a shell, an air flow channel is arranged in the shell, an installation groove is arranged on the side wall of the air flow channel, a flow sensor is fixed in the installation groove, and the head of the flow sensor extends into the air flow channel; one end of the air flow channel protrudes from the shell and is provided with a disposable mouthpiece, and the other end is provided with a dustproof plug.
[0006] The flow sensor is electrically connected to a circuit control board, the circuit control board is connected to a display screen, a power module and a control switch respectively, the display screen is installed on the shell and is used for displaying measurement data, the power module is used for providing power, and the control switch is a power on / off key of the detector.
[0007] Preferably, the air flow channel includes a front section, a middle section and a rear section, the front section is a thin-walled structure in a cylindrical shape, the rear section is a thin-walled structure in a round rectangular shape, and the middle section is a transition section, one end of which is connected to the front section, and the other end of which is connected to the rear section.
[0008] Preferably, the installation groove is located in the middle of the rear section.
[0009] Preferably, the inner surface of the air flow channel is smooth.
[0010] Preferably, the flow sensor is a MEMS hot film flow sensor.
[0011] Preferably, the circuit control board is further electrically connected with a Bluetooth module and a buzzer.
[0012] Preferably, the power module comprises a lithium battery and a type-c charging interface.
[0013] Preferably, the flow sensor and the circuit control board are further electrically connected with a sensor acquisition circuit and an analog-digital conversion circuit.
[0014] The portable lung function detector has the advantages that:
[0015] The portable lung function detector has the advantages that:
[0016] Further, the MEMS hot film flow sensor and the air flow channel conforming to the fluid mechanics simulation design are adopted, so that the measurement data are more accurate.
[0017] Further, the portable lung function detector is suitable for measuring the air volume through the lung in a unit time by testing the volume of air exhaled by a patient in a short time, such as maximum expiratory flow rate (PEF), forced vital capacity (FVC) and forced expiratory volume in one second (FEV1), and the like, and is used for evaluating the lung health and respiratory function of an individual. BRIEF DESCRIPTION OF DRAWINGS
[0018] Fig. 1 is a three-dimensional structural schematic view of a portable lung function detector of the utility model;
[0019] Fig. 2 is an exploded structural schematic view of a portable lung function detector of the utility model;
[0020] Fig. 3 is a local structural schematic view of a portable lung function detector of the utility model;
[0021] Fig. 4 is a circuit principle schematic view of a portable lung function detector of the utility model. DETAILED DESCRIPTION
[0022] The utility model will be described in further detail below in combination with the drawings and examples.
[0023] Reference is made to the drawings Figs. 1 to 4The application discloses a portable lung function detector, which comprises a shell, an air flow channel, a flow sensor, a disposable mouthpiece and a dustproof plug.
[0024] The flow sensor 5 is electrically connected with a circuit control board 8, the circuit control board 8 is connected with a display screen 9, a power module and a control switch 10, the display screen 9 is arranged in the shell and used for displaying measurement data, and sponge is filled between the display screen 9 and the circuit control board 8. The power module is used for providing power, and the control switch 10 is a switch key of the detector. The circuit control board 8 is a micro control unit containing a single-chip microcomputer or an FPGA.
[0025] The air flow channel 3 comprises a front section, a middle section and a rear section. The front section is a small-diameter cylindrical thin-wall structure and is connected with the disposable mouthpiece 6. The rear section is a circular-rectangular thin-wall structure, and the mounting groove 4 is arranged in the middle of the rear section. The middle section is a transition section and is connected with the front section at one end and connected with the rear section at the other end. In other words, the shape of the front end of the middle section is the same as that of the front section. The shape of the rear end of the middle section is the same as that of the rear section. The inner surface of the air flow channel 3 is smooth. The sizes of the various parts are smooth and the size of the disposable mouthpiece 6 is small, so that a user can conveniently blow air. When the blown air enters the front section of the air flow channel 3, the gas flow speed is relatively fast. After the air passes through the middle section and enters the rear section, the gas flow speed is reduced. The inner wall of the air flow channel is smooth, the blown air still maintains stability after entering the rear section and then contacts the flow sensor 5. After the flow sensor 5 measures the flow speed, a signal is transmitted to the circuit control board 8 to calculate real-time flow and display the real-time flow on the display screen 9.
[0026] The flow sensor 5 is a MEMS hot-film flow sensor 5. The MEMS hot-film flow sensor 5 measures the gas flow speed based on the heat conduction principle. The sensor has a small volume, a thickness less than 2 mm and an area less than 0.5 square millimeters, and is beneficial to the integration and miniaturization of the equipment. The sensor has high sensitivity and precision, high sensitivity under low flow speed working conditions, wide measurement range, fast response speed and a long service life.
[0027] The circuit control board 8 is also electrically connected with a Bluetooth module 11 and a buzzer 12, respectively, and the Bluetooth module 11 can facilitate communication with mobile phones, computers and other devices, so as to facilitate checking and sharing of detected data. The power module includes a lithium battery 13 and a type-c charging interface 14. A sensor acquisition circuit 15 and an analog-digital conversion circuit 16 are also electrically connected between the flow sensor 5 and the circuit control board 8.
[0028] In use, first install the disposable mouthpiece 6, remove the dust plug 7, press and hold the control switch 10, and the display screen 9 is lit, so that lung function detection can be started. After a user takes a deep breath, air is blown through the disposable mouthpiece 6 to the air flow channel 3, the exhaled gas passes through the air flow channel 3, and the gas passes through the flow sensor 5, which tests the gas flow rate in real time and outputs a signal. The signal data is processed and stored by the circuit control board 8, connected with a mobile phone and a computer through the Bluetooth module 11, and information transmission is performed. After detection is completed, the disposable mouthpiece 6 is removed, and the dust plug 7 is installed back.
[0029] The above describes a preferred embodiment of the utility model and the technical principle used thereby, and for those skilled in the art, any equivalent transformation, simple replacement and the like based on the technical scheme of the utility model without departing from the spirit and scope of the utility model are all within the protection scope of the utility model.
Claims
1. A portable spirometer, characterized by comprising: The detector comprises a shell, an air flow channel is arranged in the shell, a mounting groove is arranged on the side wall of the air flow channel, a flow sensor is fixed in the mounting groove, and the head of the flow sensor extends into the air flow channel; one end of the air flow channel protrudes from the shell and is provided with a disposable nozzle, and the other end is provided with a dustproof plug; The flow sensor is electrically connected to a circuit control board, the circuit control board is connected to a display screen, a power module and a control switch respectively, the display screen is arranged on the shell and is used for displaying measurement data, the power module is used for providing power, and the control switch is a power on / off key of the detector.
2. The portable spirometry apparatus of claim 1, wherein, The air flow channel comprises a front section, a middle section and a rear section, the front section is a thin-walled structure in a cylindrical shape, the rear section is a thin-walled structure in a round rectangular shape, and the middle section is a transition section, one end of which is connected to the front section and the other end of which is connected to the rear section.
3. The portable pulmonary function tester of claim 2, wherein, The mounting groove is arranged in the middle of the rear section.
4. The portable spirometry apparatus of claim 3, wherein the airway pressure sensor is a pressure transducer. The inner surface of the air flow channel is smooth.
5. The portable spirometry apparatus according to any one of claims 1 to 4, wherein The flow sensor is a MEMS hot film type flow sensor.
6. The portable spirometry device of claim 1, wherein, The circuit control board is further electrically connected to a Bluetooth module and a buzzer.
7. The portable spirometry device of claim 1, wherein, The power module comprises a lithium battery and a type-c charging interface.
8. The portable spirometry device of claim 1, wherein, The flow sensor and the circuit control board are further electrically connected to a sensor acquisition circuit and an analog-to-digital conversion circuit.