An alcohol gas concentration measuring device

Abstract

This invention relates to an alcohol gas concentration measuring device. Its features include a pressure sensor, an alcohol sensor, a bellows, a piezoelectric ceramic intake assembly, and a main controller housed within a casing. One end of the casing has a first air inlet pipe connected to the alcohol sensor, and the other end has a first air outlet connected to the first air inlet pipe. A pressure sensor is located at the end of the first air inlet pipe. The main controller is electrically connected to both ends of the main controller, which is connected to the alcohol sensor and the piezoelectric ceramic intake assembly via the bellows. This invention achieves accurate measurement and precise zeroing by using the piezoelectric ceramic intake assembly, which draws air in both directions through the piezoelectric ceramic plate. Furthermore, a bellows is added between the piezoelectric ceramic intake assembly and the alcohol sensor to prevent residual acidic liquid from corroding the electronic components.

Description

Technical Field

[0001] This utility model specifically relates to an alcohol gas concentration measuring device, belonging to the technical field of alcohol detectors. Background Technology

[0002] Currently, there are two sampling methods for alcohol analyzers: one is to use an electrochemical sensor and a quantitative gas pump or electromagnet gas pump for quantitative analysis. When gas flows through the detection blowing pipe, the gas pump automatically draws in a quantitative amount of gas to the sensor, the analysis is completed, and then the gas is discharged from the sensor's inlet.

[0003] Another method uses an electrochemical sensor and a gas pump for qualitative analysis. The gas pump continuously draws a certain flow rate of gas and passes it through the sensor. The sensor analyzes whether the gas contains alcohol molecules, and then the excess gas is discharged from the pump end.

[0004] Both of these methods have fatal flaws. The first method can easily draw excessive alcohol gas molecules between the sensor and the gas pump, resulting in long-term alcohol residue and inaccurate system measurements.

[0005] In addition, continuous air extraction can easily draw a large amount of high-concentration alcohol molecules into the sensor, causing the sensor to malfunction or even become overloaded and rapidly degrade its response.

[0006] Therefore, in order to address the shortcomings of existing technologies, an alcohol gas concentration measuring device is proposed. Utility Model Content

[0007] The purpose of this invention is to provide an alcohol gas concentration measuring device to solve the problems mentioned in the background art.

[0008] This utility model achieves the above-mentioned objective through the following technical solution: an alcohol gas concentration measuring device, comprising a housing, characterized in that a pressure sensor, an alcohol sensor, a bellows, a piezoelectric ceramic intake assembly, and a main controller are disposed inside the housing; a first air inlet pipe is disposed at one end of the housing, the first air inlet pipe being connected to the alcohol sensor; a first air outlet is disposed at the other end of the housing, the first air inlet pipe being connected to the first air outlet; the pressure sensor is disposed at the end of the first air inlet pipe for sensing whether the user is blowing air; the two ends of the main controller are electrically connected to the alcohol sensor and the piezoelectric ceramic intake assembly, respectively; the alcohol sensor and the piezoelectric ceramic intake assembly are connected through the bellows, the bellows being used to store excess liquid to prevent corrosion of other electronic components.

[0009] Furthermore, the piezoelectric ceramic intake assembly includes a first piezoelectric ceramic plate and a second piezoelectric ceramic plate. The second piezoelectric ceramic plate is used to draw in gas in the forward direction for detection by the alcohol sensor, and the first piezoelectric ceramic plate is used to draw in air in the reverse direction to expel residual gas.

[0010] Furthermore, a second air intake pipe is provided at one end of the outer casing, which is connected to the piezoelectric ceramic air intake assembly for drawing in air.

[0011] Furthermore, a second vent is provided at the other end of the outer casing.

[0012] The beneficial effects of this utility model are:

[0013] This invention achieves accurate measurement and precise zeroing by setting up a piezoelectric ceramic suction component, which uses a piezoelectric ceramic plate in the component to draw air in both directions. At the same time, a corrugated tube is added between the piezoelectric ceramic suction component and the alcohol sensor to prevent residual acidic liquid from corroding electronic components. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention;

[0015] Figure 2 This is a top view of the present invention;

[0016] Figure 3 This is a side view of the present invention;

[0017] Figure 4 This is a schematic diagram of the modules of this utility model;

[0018] Figure 5 This is a schematic diagram of the airflow trajectory of the first piezoelectric ceramic sheet of this utility model;

[0019] Figure 6 This is a schematic diagram of the airflow trajectory of the second piezoelectric ceramic sheet of this utility model;

[0020] In the diagram: 100, Main controller; 101, Pressure sensor; 102, Alcohol sensor; 103, Piezoelectric ceramic intake assembly; 105, External communication interface; 106, Bellows; 107, First air inlet pipe; 108, First air outlet; 109, Second air inlet pipe; 110, Second air outlet; 111, First piezoelectric ceramic sheet; 112, Second piezoelectric ceramic sheet; 201, First drive circuit; 202, Amplification and filtering circuit; 203, Second drive circuit; 1, Housing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-6 As shown, Figures 1-6 An alcohol gas concentration measuring device according to the present invention is shown schematically.

[0023] An alcohol gas concentration measuring device includes a housing 1. The housing 1 contains a pressure sensor 101, an alcohol sensor 102, a bellows 106, a piezoelectric ceramic intake assembly 103, and a main controller 100. One end of the housing 1 has a first air inlet pipe 107 connected to the alcohol sensor 102. The other end of the housing 1 has a first air outlet 108 connected to the first air inlet pipe 107. The pressure sensor 101 is located at the end of the first air inlet pipe 107 to detect whether the user is exhaling. The two ends of the main controller 100 are electrically connected to the alcohol sensor 102 and the piezoelectric ceramic intake assembly 103, respectively. The alcohol sensor 102 and the piezoelectric ceramic intake assembly 103 are connected via the bellows 106, which stores excess liquid to prevent corrosion of other electronic components.

[0024] A bellows 106 is provided between the alcohol sensor 102 and the piezoelectric ceramic intake assembly 103 to prevent acidic substances from flowing out to the piezoelectric ceramic intake assembly 103 and thus corroding other electronic components.

[0025] The bellows 106 utilizes the capillary action and expansion retention adsorption principle of the bellows cavity to prevent the random occurrence of acidic liquid corrosion of downstream piezoelectric ceramics or air pump components. Similarly, if acidic liquid is retained and adsorbed in the bellows cavity during the test, it can be blown back to the sensor by reverse air blowing and discharged from the sensor's first air blowing port, which can effectively prevent acidic liquid from corroding downstream piezoelectric ceramics or air pump components.

[0026] Furthermore, the piezoelectric ceramic intake assembly 103 includes a first piezoelectric ceramic sheet 111 and a second piezoelectric ceramic sheet 112. The second piezoelectric ceramic sheet 112 is used to draw in gas in the forward direction for detection by the alcohol sensor 102, and the first piezoelectric ceramic sheet 111 is used to draw in air in the reverse direction to expel residual gas.

[0027] Among them, such as Figure 5-6As shown, when the pressure sensor 101 senses the flow of gas, the second piezoelectric ceramic plate 112 in the piezoelectric ceramic gas intake assembly 103 starts to work, drawing in a quantitative amount of gas into the sensor for analysis of the alcohol content in the gas. After the analysis is completed, the first piezoelectric ceramic plate 111 starts to work, drawing in clean air from the outside in the reverse direction to completely remove the residual gas in the device, achieving an absolute zero state inside the sampling device and ensuring the accuracy of each collection and analysis.

[0028] The piezoelectric ceramic intake component 103 draws in a fixed amount of gas through micro-vibration, controls the gas volume drawn in from the sensor each time, and serves as a driving element to convert electrical energy into mechanical energy through the piezoelectric effect, thereby achieving gas compression and emission.

[0029] Furthermore, one end of the outer casing 1 is also provided with a second air inlet pipe 109, which is connected to the piezoelectric ceramic air intake assembly 103 for drawing in air.

[0030] Furthermore, the other end of the outer casing 1 is also provided with a second vent 110.

[0031] The outer casing 1 is also provided with an external communication interface 105, which is used to realize data transmission and communication between devices or systems, and to ensure the stability and security of information exchange.

[0032] The main controller 100 is electrically connected to the pressure sensor via the drive circuit 201, electrically connected to the alcohol sensor 102 via the amplification and filtering circuit, and electrically connected to the piezoelectric ceramic inhalation assembly via the drive circuit 203.

[0033] The beneficial effects of this utility model are:

[0034] This invention utilizes a piezoelectric ceramic suction component 103 to perform forward and reverse air intake via the piezoelectric ceramic plate within the component, thereby achieving accurate measurement and precise zeroing. Additionally, a corrugated tube is provided between the piezoelectric ceramic suction component and the alcohol sensor to prevent residual acidic liquid from corroding electronic components.

[0035] The working principle of this utility model:

[0036] The user blows air into the first air inlet pipe, and the pressure sensor 101 detects whether the user is blowing air. When gas is detected flowing through the first air inlet pipe 107, most of the gas is discharged from the first air outlet 108. A portion of the gas is drawn into the sensor 102 by the vibration of the piezoelectric ceramic 112 in the piezoelectric ceramic suction assembly 103 to measure the alcohol content in the gas. After the analysis is completed, the excess gas is discharged from the second air outlet 110. The piezoelectric ceramic 111 in the other piezoelectric ceramic suction assembly 103 starts to vibrate and draws in clean air (gas without alcohol) from the second air inlet pipe 109 in the reverse direction to completely remove the residual gas in the sensor 102 and the corrugated pipe 106, achieving an absolute zero state inside the sampling system, thereby ensuring the accuracy of the next measurement.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An alcohol gas concentration measuring device comprising a housing, characterized by, The housing contains a pressure sensor, an alcohol sensor, a bellows, a piezoelectric ceramic inhalation assembly, and a main controller. One end of the housing has a first air inlet pipe connected to the alcohol sensor, and the other end has a first air outlet connected to the first air inlet pipe. The pressure sensor is located at the end of the first air inlet pipe to detect whether the user is exhaling. The main controller is electrically connected to the alcohol sensor and the piezoelectric ceramic inhalation assembly at both ends. The alcohol sensor and the piezoelectric ceramic inhalation assembly are connected via the bellows, which stores excess liquid to prevent corrosion of other electronic components.

2. An alcohol gas concentration measuring device as claimed in claim 1, characterized in that The piezoelectric ceramic intake assembly includes a first piezoelectric ceramic plate and a second piezoelectric ceramic plate. The second piezoelectric ceramic plate is used to draw in gas in the forward direction for detection by the alcohol sensor, and the first piezoelectric ceramic plate is used to draw in air in the reverse direction to remove residual gas.

3. An alcohol gas concentration measuring device as claimed in claim 2, characterized in that One end of the outer casing is also provided with a second air inlet pipe, which is connected to the piezoelectric ceramic air intake assembly for drawing in air.

4. An alcohol gas concentration measuring device as claimed in claim 3, characterized in that The other end of the outer casing is also provided with a second vent.

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