Respiratory airflow monitoring device and physiological information acquisition system

Abstract

The utility model provides a respiratory airflow monitoring device and a physiological information acquisition system. According to the scheme, the respiratory airflow monitoring device comprises a humidity sensor, a radio frequency tag and a reader, the antenna, the temperature sensor and the power supply modulation circuit of the radio frequency tag are connected in sequence; the electric energy output of the power supply modulation circuit is used for supplying energy to the radio frequency tag; and radio frequency communication is carried out between the radio frequency tag and the reader.

Description

Technical Field

[0001] The utility model belongs to the technical field of physiological information collection, and in particular relates to a respiratory airflow monitoring device and a physiological information collection system. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The inventors have found that the existing direct contact respiratory airflow monitoring devices mainly include nasal pressure sensors and oral and nasal temperature sensors. Among them, the nasal pressure sensor requires a nasal airflow tube to be inserted into the nostrils, causing the patient to feel a foreign body sensation and poor comfort; the oral and nasal temperature sensor can monitor signals proportional to the temperature changes of the inhaled and exhaled air during breathing. Some oral and nasal temperature sensors also need to be inserted into the nostrils, which is less comfortable. Another part needs to be pasted between the mouth and nostrils, but can only measure one respiratory airflow signal; other non-contact respiratory airflow monitoring devices such as radar millimeter waves, cardiopulmonary bypass, etc. cannot directly obtain nasal airflow signals, but obtain nasal airflow signals by monitoring respiratory movements, and their monitoring accuracy is relatively low. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a respiratory airflow monitoring device and a physiological information acquisition system. The scheme provides a passive two-way respiratory airflow signal monitoring device based on a humidity sensor. By adopting radio frequency transmission signals and power supply, no battery power supply is required, and no need to insert it into the nostrils, it has the characteristics of small size and high comfort. At the same time, the scheme can monitor the airflow signals of two nostrils at the same time, especially when one nostril is blocked, which is of positive significance.

[0005] According to the first aspect of the embodiment of the utility model, a respiratory airflow monitoring device is provided, comprising a humidity sensor, a radio frequency tag and a reader; the antenna, temperature sensor and power modulation circuit of the radio frequency tag are connected in sequence; the electric energy output of the power modulation circuit is used to supply energy to the radio frequency tag; and radio frequency communication is performed between the radio frequency tag and the reader.

[0006] Furthermore, the humidity sensor includes a first humidity sensor and a second humidity sensor, and the first humidity sensor and the second humidity sensor are both connected to independent radio frequency tags.

[0007] Furthermore, the first humidity sensor and the second humidity sensor are respectively arranged under different nostrils.

[0008] Furthermore, the humidity sensor includes a first electrode and a second electrode, and a plurality of electrode columns are disposed on opposite sides of the first electrode and the second electrode, and the electrode columns of the first electrode and the electrode columns of the second electrode are arranged in an alternating manner.

[0009] Furthermore, silicon dioxide nanoparticles are filled between the first electrode and the second electrode.

[0010] Furthermore, a polyimide film is disposed on one side of the first electrode and the second electrode where no electrode column is disposed.

[0011] Furthermore, the signals received by the RFID tag antenna are sequentially transmitted through the decoder and the controller to the memory; the information stored in the memory is transmitted through the encoder and the load modulation chip to the RFID tag antenna, and is transmitted to the reader through the RFID tag antenna and the reader antenna.

[0012] Furthermore, the power modulation circuit may adopt a bridge circuit for rectification.

[0013] Furthermore, the electrode is a silver electrode.

[0014] According to a second aspect of an embodiment of the utility model, a physiological information acquisition system is provided, comprising the above-mentioned respiratory airflow monitoring device.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The utility model provides a respiratory airflow monitoring device and a physiological information acquisition system. The scheme provides a passive two-way respiratory airflow signal monitoring device based on a humidity sensor. By adopting radio frequency transmission signals and power supply, no battery power is required, and no need to insert it into the nostrils, it has the characteristics of small size and high comfort.

[0017] (2) The scheme can monitor the airflow signals of two nostrils simultaneously, which is of positive significance, especially when one nostril is blocked.

[0018] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 This is a schematic diagram of the placement of the respiratory airflow monitoring device of the utility model when it is implemented;

[0021] Figure 2 This is a schematic diagram of the structure of the humidity sensor described in the utility model;

[0022] Figure 3 This is a schematic diagram of the humidity sensor of the utility model;

[0023] Figure 4 This is a schematic diagram of the signal transmission structure of the utility model;

[0024] Among them, 1. Radio frequency tag; 2. Nose; 3. Humidity sensor; 4. Electrode; 5. Silica nanoparticles; 6. Polyimide film. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] Embodiment 1:

[0030] The purpose of this embodiment is to provide a respiratory airflow monitoring device.

[0031] like Figure 1 and Figure 4 As shown, a respiratory airflow monitoring device includes a humidity sensor 3, a radio frequency tag 1 and a reader; the antenna, temperature sensor 3 and power modulation circuit of the radio frequency tag 1 are connected in sequence; the power output of the power modulation circuit is used to supply energy to the radio frequency tag 1; radio frequency communication is performed between the radio frequency tag 1 and the reader.

[0032] In a specific implementation, the humidity sensor 3 includes a first humidity sensor and a second humidity sensor, and the first humidity sensor and the second humidity sensor are both connected to an independent radio frequency tag 1 .

[0033] In a specific implementation, the first humidity sensor and the second humidity sensor are respectively arranged under different nostrils. Specifically, the placement position of the respiratory airflow monitoring device is as follows: Figure 1 As shown, 2 represents a nose, 3 represents a humidity sensor, and the humidity sensor is arranged directly opposite to the nostril.

[0034] In a specific implementation, the humidity sensor includes a first electrode and a second electrode, and a plurality of electrode columns are disposed on opposite sides of the first electrode and the second electrode, and the electrode columns of the first electrode and the electrode columns of the second electrode are staggered.

[0035] In a specific implementation, silicon dioxide nanoparticles are filled between the first electrode and the second electrode.

[0036] In a specific implementation, a polyimide film is disposed on one side of the first electrode and the second electrode where no electrode column is disposed.

[0037] In a specific implementation, the signal received by the antenna of the RFID tag reaches the memory via the decoder and the controller in sequence; the information stored in the memory reaches the antenna of the RFID tag via the encoder and the load modulation chip, and is transmitted to the reader through the antenna of the RFID tag and the antenna of the reader.

[0038] Specifically, the structure of the humidity sensor is as follows: Figure 2 As shown, electrode 4 is a silver electrode, and a total of 10 electrode columns are arranged between the first electrode and the second electrode; the dotted arrow is the direction of the current, and silicon dioxide nanoparticles are filled between the first electrode and the second electrode. After the sensor is aligned with the nostrils, the moisture of the breathing airflow will pass along the dotted line, and the conductivity will be enhanced. The greater the humidity, the stronger the conductivity. Periodic breathing will cause the conductivity of the humidity sensor to change periodically.

[0039] In one or more embodiments, the humidity sensor has three layers such as Figure 3 As shown, a polyimide film 6 is used as a substrate, an electrode 4 is a silver electrode, and silicon dioxide nanoparticles 5 are filled between the first electrode and the second electrode.

[0040] In a specific implementation, the preparation process of the humidity sensor is as follows: first, the polyimide film is cleaned and the hydrophilicity is improved by using an ultraviolet ozone cleaning machine, and then the aluminum-silver cross electrode is prepared by a metal mask thermal evaporation method. Figure 2 After the polyimide film was ultrasonically cleaned with acetone and isopropanol, 50 μL of colloidal SiO2 was dropped and dried at 90°C.

[0041] In a specific implementation, the humidity sensor is powered by radio frequency, without the need for batteries or other power supplies, and a radio frequency tag is placed at a position such as Figure 1 As shown; respiratory airflow signal transmission is as follows Figure 4As shown, the MCU sends a signal instruction to the antenna 2 in the reader, and the antenna 2 transmits the signal and energy to the antenna 1. The humidity sensor is located between the power modulation and the antenna 1 (that is, the humidity sensor is set in the rectifier circuit part of the antenna 1, and the rectifier circuit can be rectified by a bridge circuit so that the energy of the entire circuit changes periodically with the respiratory airflow). After the sensor is aligned with the nostrils, the conductivity of the respiratory airflow is enhanced. The greater the humidity, the stronger the conductivity. Periodic breathing will cause the conductivity of the humidity sensor to change periodically, and the energy supply of the radio frequency tag will change periodically. The power supply is modulated to supply energy to the entire radio frequency tag. Antenna 1 transmits the timing signal to the decoder, decodes it, and sends it to the controller. The controller writes the data in the memory. The encoder encodes the data and modulates it to the antenna 1 through load modulation. The load modulation is adjusted according to the binary data stream, so that the size and phase of the electronic tag impedance change accordingly, thereby completing the modulation process. Antenna 1 transmits the respiratory airflow signal to the antenna 2 in the reader, amplifies the signal through the signal amplifier, transmits it to the bandpass filter for filtering, transmits it to the MCU, and transmits it to the host computer through the Bluetooth module.

[0042] Among them, the humidity sensor measures the humidity in the respiratory airflow, and the respiratory signal is a periodic signal, so the humidity of the airflow entering and exiting the stomata will change periodically. The humidity sensor measures the humidity and transmits the periodic signal of humidity change (i.e., the respiratory signal) to antenna 2 through antenna 1, and then transmits it to the host computer to obtain the respiratory signal, and monitor the respiratory airflow based on the acquired respiratory signal.

[0043] Embodiment 2:

[0044] The purpose of this embodiment is to provide a physiological information collection system, including the above-mentioned respiratory airflow monitoring device.

[0045] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A respiratory airflow monitoring device, characterized in that: It includes a humidity sensor, a radio frequency tag and a reader; the antenna, temperature sensor and power modulation circuit of the radio frequency tag are connected in sequence; the electric energy output of the power modulation circuit is used to supply energy to the radio frequency tag; and radio frequency communication is performed between the radio frequency tag and the reader.

2. A respiratory airflow monitoring device as claimed in claim 1, characterized in that: The humidity sensor comprises a first humidity sensor and a second humidity sensor, and both the first humidity sensor and the second humidity sensor are connected with independent radio frequency tags.

3. A respiratory airflow monitoring device as claimed in claim 2, characterized in that: The first humidity sensor and the second humidity sensor are respectively arranged under different nostrils.

4. A respiratory airflow monitoring device as claimed in claim 1, characterized in that: The humidity sensor comprises a first electrode and a second electrode. A plurality of electrode columns are arranged on opposite sides of the first electrode and the second electrode, and the electrode columns of the first electrode and the electrode columns of the second electrode are arranged alternately.

5. A respiratory airflow monitoring device as claimed in claim 4, characterized in that: Silicon dioxide nanoparticles are filled between the first electrode and the second electrode.

6. A respiratory airflow monitoring device as claimed in claim 4, characterized in that: A polyimide film is disposed on one side of the first electrode and the second electrode where no electrode column is disposed.

7. A respiratory airflow monitoring device as claimed in claim 1, characterized in that: The signals received by the antenna of the RFID tag are sequentially transmitted to the memory via the decoder and the controller; the information stored in the memory is transmitted to the antenna of the RFID tag via the encoder and the load modulation chip, and is transmitted to the reader via the antenna of the RFID tag and the antenna of the reader.

8. A respiratory airflow monitoring device as claimed in claim 1, characterized in that: The power modulation circuit may adopt a bridge circuit for rectification.

9. A respiratory airflow monitoring device as claimed in claim 4, characterized in that: The first electrode and the second electrode are silver electrodes.

10. A physiological information collection system, characterized in that: It comprises a respiratory airflow monitoring device as described in any one of claims 1-9.

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