A temperature-controlled electronic nose gas chamber convenient to disassemble

Abstract

The utility model belongs to gas detection technical field discloses a kind of temperature control electronic nose air chamber of convenient disassembly, main part is equipped with detection cavity, and the air inlet and the air outlet of the communication detection cavity are separately provided, gas cover is detachably sealed and installed in the opening end of main part, it is convenient to disassemble, circuit board is installed in the side of gas cover close to opening end and located detection cavity, to guarantee the sealing property of detection cavity, the side of circuit board is arranged heating film connected in control component, gas sensor unit and temperature sensor, the gas to be examined enters detection cavity by air inlet, is discharged along air outlet by gas route, gas sensor unit will detection signal be transmitted to control component, monitoring and collecting gas condition, temperature sensor detects detection cavity temperature, and will detection signal be transmitted to control component, control component receives and calculates the heating power required to control detection cavity in preset range, control heating film adjusts to corresponding heating power, to improve sensing performance, to improve detection precision further.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a temperature-controlled electronic nose air chamber that is easy to disassemble. Background Technology

[0002] An electronic nose is an electronic system that uses the response patterns of a gas sensor array to identify odors. The core components of an electronic nose are the sensor array and a sealed gas chamber. Various sensors are housed together in a compact, sealed gas chamber. When the sample gas enters the gas chamber, it causes changes in the electrical characteristics of each sensor array. Simultaneously, through circuit conditioning and amplification, the characteristic changes of the sensors are transmitted to the sampling circuit.

[0003] Existing electronic nose air chambers typically attach a sealed metal cover directly to the circuit board on which the sensor array is mounted. A sealing gasket is placed between the metal cover and the circuit board, and the metal cover is fixed to the circuit board with screws. This results in poor airtightness. In addition, gas sensors are temperature-sensitive devices, and their output signals drift with changes in ambient temperature. Existing electronic nose air chambers cannot provide a relatively stable temperature detection environment for gas sensors, resulting in poor sensing performance. Utility Model Content

[0004] The purpose of this invention is to provide a temperature-controlled electronic nose air chamber that is easy to disassemble, has high airtightness, and can effectively improve sensing performance.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A temperature-controlled electronic nasal air chamber that is easy to disassemble includes:

[0007] The detection component includes a main body, an air cover, a circuit board, and a heating film. The main body has a detection chamber and an air inlet and an air outlet that are spaced apart and communicate with the detection chamber. One side of the main body is an open end. The air cover is detachably and sealed to the open end of the main body. The circuit board is installed on the side of the air cover near the open end and located in the detection chamber. A heating film is laid on one side of the circuit board, and a gas sensor unit and a temperature sensor are inserted on one side of the circuit board.

[0008] The control component is connected to the heating film, the gas sensor unit, and the temperature sensor. The control component is used to receive and process the detection signal from the gas sensor unit and control the heating power of the heating film based on the detection signal from the temperature sensor.

[0009] Preferably, the detection component further includes a sealing gasket, which is sandwiched between the air cap and the open end of the main body, and the sealing gasket is arranged around the open end.

[0010] Preferably, the main body has an internal mounting board rail, the circuit board is horizontally mounted on the air cover, the circuit board has a slot along its width, the slot extends to the side of the circuit board away from the air cover, and the slot is limited to the board rail.

[0011] Preferably, both the air inlet and the air outlet are located on the side of the main body away from the opening end.

[0012] Preferably, the air inlet and the air outlet are spaced apart in the vertical direction, and the height of the air inlet is lower than the height of the circuit board, while the height of the air outlet is higher than the height of the circuit board.

[0013] Preferably, a connecting plate is circumferentially mounted on the open end of the main body, the sealing gasket is sandwiched between the connecting plate and the air cover, and a plurality of bolts are circumferentially spaced, with one end of each bolt passing through the air cover, the sealing gasket and the connecting plate in sequence before being fixed.

[0014] Preferably, the bolt is a treasury bolt.

[0015] Preferably, the control component includes a microprocessor unit, a temperature acquisition unit, and a signal acquisition unit. The temperature sensor is connected to the temperature acquisition unit, the temperature acquisition unit and the heating film are both connected to the microprocessor unit, and the gas sensor unit is connected to the signal acquisition unit.

[0016] Preferably, the easily detachable temperature-controlled electronic nose air chamber also includes a cable, the temperature sensor is connected to the temperature acquisition unit via the cable, the gas sensor unit has its signal conditioned via the circuit board, the circuit board is connected to the signal acquisition unit via the cable, and the heating film is connected to the microprocessor unit via the cable.

[0017] Preferably, the circuit board is equipped with several sensor sockets, the gas sensor unit includes several gas sensors, and the temperature sensor and several of the gas sensors are inserted into the corresponding sensor sockets.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a temperature-controlled electronic nose air chamber that is easy to disassemble, including a detection component and a control component. The detection component includes a main body, an air cover, a circuit board, and a heating film. The main body has a detection chamber with an air inlet and an air outlet that are spaced apart and communicate with the detection chamber. One side of the main body is an open end. The air cover is detachably and sealed at the open end of the main body for easy disassembly. The circuit board is installed on the side of the air cover near the open end and located in the detection chamber to ensure the sealing of the detection chamber. A heating film is laid on one side of the circuit board, and a gas sensor unit and a temperature sensor are inserted on the other side of the circuit board. The heating film, the gas sensor unit, and the temperature sensor are all connected to the control component. The gas to be detected enters the detection chamber through the air inlet and passes through one side of the circuit board along the gas path. During this process, the detection signal from the gas sensor unit is processed by the conditioning circuit and amplification circuit on the circuit board and then transmitted to the control component to monitor the gas detection. The temperature sensor detects the temperature of the detection chamber and transmits the detection signal to the control component. The control component receives and calculates the heating power required to control the detection chamber within a preset range, and controls the heating film to adjust to the corresponding heating power to improve sensing performance and thus improve detection accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a temperature-controlled electronic nasal air chamber that is easy to disassemble, provided by an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the circuit board structure provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the detection component provided in an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Main body; 11. Air inlet; 12. Air outlet; 13. Board guide rail; 14. Connecting plate; 2. Air cover; 3. Circuit board; 31. Slot; 4. Heating film; 5. Gas sensor unit; 6. Temperature sensor; 7. Sealing gasket; 8. Bolt; 9. Control components; a. Cable. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] This embodiment provides a temperature-controlled electronic nose air chamber that is easy to disassemble, has high airtightness, and can effectively improve sensing performance.

[0030] Please see Figures 1 to 3 A temperature-controlled electronic nose air chamber that is easy to disassemble includes a detection component, which includes a main body 1, an air cover 2, a circuit board 3, and a heating film 4. The main body 1 and the air cover 2 form a sealed and detachable connection structure to facilitate disassembly for maintenance of the internal sensor components. The circuit board 3 is installed on the air cover 2, and after the connection between the main body 1 and the air cover 2 is completed, the circuit board 3 is located inside the main body 1 to ensure high airtightness. At the same time, the heating film 4 is laid on the circuit board 3 to provide a detection environment with small temperature changes, effectively improving the sensing performance.

[0031] For example, the main body 1 is provided with a detection chamber, and one side of the main body 1 is an open end. The gas cover 2 is detachably and sealedly installed on the open end of the main body 1 to form a closed space. The circuit board 3 is installed on the side of the gas cover 2 near the open end. A gas sensor unit 5 is inserted into one side of the circuit board 3. After the installation of the main body 1 and the gas cover 2 is completed, the circuit board 3 is located in the detection chamber, which facilitates gas detection through the gas sensor unit 5 inserted into one side of the circuit board 3.

[0032] Optionally, to ensure the airtightness of the detection chamber, the detection assembly also includes a sealing gasket 7. The sealing gasket 7 is annular and is arranged around the opening end. The sealing gasket 7 is sandwiched between the air cover 2 and the opening end of the main body 1 to ensure the airtightness of the detection chamber.

[0033] This embodiment also includes a connecting plate 14 circumferentially installed at the open end of the main body 1. Please refer to [link / reference]. Figure 3 The outer edge of the connecting plate 14 is circumferentially connected to the open end of the main body 1, and the inner edge extends inward to clamp the sealing gasket 7 between the connecting plate 14 and the air cover 2. The air cover 2, the sealing gasket 7 and the connecting plate 14 are pre-drilled with circumferentially spaced mounting holes. Several bolts 8 are circumferentially spaced, and one end of the bolts 8 is passed through the mounting holes on the air cover 2, the sealing gasket 7 and the connecting plate 14 in sequence and then fixed, thereby tightly connecting the main body 1, the sealing gasket 7 and the air cover 2.

[0034] Preferably, the air cap 2, the sealing gasket 7, and the connecting plate 14 each have six pre-drilled mounting holes spaced circumferentially, suitable for the use of six bolts 8. More preferably, the bolts 8 are swivel bolts 8. Further preferably, the bolts 8 are butterfly swivel bolts 8.

[0035] Furthermore, the gas sensor unit 5 includes several gas sensors arranged in an array, and several sensor sockets are installed on one side of the circuit board 3, with several gas sensors inserted into the corresponding sensor sockets.

[0036] Furthermore, to improve the structural stability of the circuit board 3, this embodiment also installs a board guide rail 13 inside the main body 1. Correspondingly, the circuit board 3 is horizontally mounted on the air cover 2, and a slot 31 is formed on the circuit board 3 along its width direction. The slot 31 extends to the side of the circuit board 3 away from the air cover 2. When the end of the slot 31 away from the air cover 2 is aligned with the board guide rail 13, as the air cover 2 is fastened to the opening end of the main body 1, the slot 31 gradually engages with and is positioned within the board guide rail 13. It should be noted that the board guide rail 13 is a commonly used device in the prior art, and its structure will not be described in detail here.

[0037] In this embodiment, an air inlet 11 and an air outlet 12 are spaced apart on the main body 1. Both the air inlet 11 and the air outlet 12 are connected to the detection chamber. The gas to be tested enters the detection chamber through the air inlet 11, passes through the gas sensor unit 5 on one side of the circuit board 3 along the gas path in the detection chamber, and is then discharged from the air outlet 12. The detection of the gas to be tested is completed through this process.

[0038] In some feasible embodiments, both the air inlet 11 and the air outlet 12 are located on the side of the main body 1 away from the outlet end, thereby limiting the gas path of the gas to be tested in the detection chamber, ensuring that the gas to be tested entering the detection chamber through the air inlet 11 can flow smoothly through the gas sensor unit 5 on one side of the circuit board 3, and improving the reliability of the detection results.

[0039] In some feasible embodiments, the air inlet 11 and the air outlet 12 are vertically spaced, with the height of the air inlet 11 lower than the height of the circuit board 3 and the height of the air outlet 12 higher than the height of the circuit board 3. This arrangement further defines the gas path of the gas to be tested in the detection chamber. That is, the gas to be tested entering the detection chamber through the air inlet 11 flows around the top of the circuit board 3 from the bottom and then exits from the air outlet 12, thereby ensuring that the gas sensor unit 5 can flow through one side of the circuit board 3, further improving the reliability of the detection results.

[0040] The easily detachable temperature-controlled electronic nose chamber provided in this embodiment also has a heating film 4 laid on one side of the circuit board 3. The heating film 4 controls the temperature inside the detection chamber by heating, which can indirectly control the gas to be detected to reach the set temperature, providing an environment with small temperature changes for the gas sensor, preventing the output signal of the gas sensor from drifting significantly with changes in ambient temperature, effectively improving the sensing performance, and thus improving the detection accuracy of the gas sensor.

[0041] It should be noted that the heating film 4 and several gas sensors are located on the same side of the circuit board 3. The heating film 4 is provided with multiple perforations to avoid several sensor sockets on one side of the circuit board 3.

[0042] Furthermore, a temperature sensor 6 is also installed on one side of the circuit board 3. The temperature sensor 6 is also inserted into the corresponding sensor socket, and the temperature inside the detection chamber is detected by the temperature sensor 6.

[0043] The easily detachable temperature-controlled electronic nose air chamber provided in this embodiment also includes a control component 9. The heating film 4, the gas sensor unit 5, and the temperature sensor 6 are all connected to the control component 9. The control component 9 can receive the detection signal from the gas sensor unit 5 and can also control the heating power of the heating film 4 according to the detection signal from the temperature sensor 6, so as to control the temperature of the detection chamber within a preset range.

[0044] The control component 9 includes a microprocessor unit, a temperature acquisition unit, and a signal acquisition unit. Temperature sensor 6 is connected to the temperature acquisition unit, and both the temperature acquisition unit and the heating film 4 are connected to the microprocessor unit. Gas sensor unit 5 is connected to the signal acquisition unit. Through this setup, temperature sensor 6 measures the temperature of the detection chamber and transmits the detection signal to the temperature acquisition unit. The microprocessor unit receives the signal from the temperature acquisition unit, calculates the heating power required to control the detection chamber within a preset range, and controls the heating film 4 to adjust to the corresponding heating power. The detection signal from gas sensor unit 5 is processed by the conditioning and amplification circuits on circuit board 3 and then transmitted to the signal acquisition unit for monitoring and acquiring the signals from each gas sensor.

[0045] Furthermore, the easily detachable temperature-controlled electronic nose air chamber also includes cable a, temperature sensor 6 is connected to temperature acquisition unit via cable a, gas sensor unit 5 has its signal conditioned via circuit board 3, circuit board 3 is connected to signal acquisition unit via cable a, and heating film 4 is connected to microprocessor unit via cable a.

[0046] The easily detachable temperature-controlled electronic nose air chamber provided in this embodiment allows the gas to be tested to enter the detection chamber through the air inlet 11 and pass along the air path to one side of the circuit board 3. During this process, the temperature sensor 6 measures the temperature of the detection chamber and transmits the detection signal to the temperature acquisition unit via cable a. The microprocessor unit receives the temperature acquisition unit and calculates the heating power required to control the detection chamber within a preset range. It then controls the heating film 4 to adjust to the corresponding heating power via cable a. The detection signal from the gas sensor unit 5 is processed by the conditioning circuit and amplification circuit on the circuit board 3 and then transmitted to the signal acquisition unit via cable a. This allows for the monitoring and acquisition of signals from each gas sensor, thereby ensuring airtightness. Furthermore, because the conditioning circuit is similar to the gas sensor, it has excellent sensing performance and high detection accuracy.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A temperature-controlled electronic nasal air chamber that is easy to disassemble, characterized in that, include: The detection component includes a main body (1), an air cover (2), a circuit board (3), and a heating film (4). The main body (1) has a detection chamber and an air inlet (11) and an air outlet (12) that communicate with the detection chamber are spaced apart. One side of the main body (1) is an open end. The air cover (2) is detachably and sealed to the open end of the main body (1). The circuit board (3) is installed on the side of the air cover (2) near the open end and located in the detection chamber. A heating film (4) is laid on one side of the circuit board (3). A gas sensor unit (5) and a temperature sensor (6) are inserted on one side of the circuit board (3). The control component (9) is connected to the heating film (4), the gas sensor unit (5) and the temperature sensor (6). The control component (9) is used to receive and process the detection signal of the gas sensor unit (5) and control the heating power of the heating film (4) according to the detection signal of the temperature sensor (6).

2. The easily detachable temperature-controlled electronic nose air chamber according to claim 1, characterized in that, The detection assembly also includes a sealing gasket (7), which is sandwiched between the air cap (2) and the opening end of the main body (1), and the sealing gasket (7) is arranged around the opening end.

3. The easily detachable temperature-controlled electronic nose air chamber according to claim 1, characterized in that, The main body (1) has an internal mounting board rail (13), the circuit board (3) is horizontally mounted on the air cover (2), the circuit board (3) has a slot (31) along its width direction, the slot (31) extends to the side of the circuit board (3) away from the air cover (2), and the slot (31) is limited to the board rail (13).

4. The easily detachable temperature-controlled electronic nose air chamber according to claim 1, characterized in that, Both the air inlet (11) and the air outlet (12) are located on the side of the main body (1) away from the opening end.

5. The easily detachable temperature-controlled electronic nose air chamber according to claim 4, characterized in that, The air inlet (11) and the air outlet (12) are spaced apart in the vertical direction, and the height of the air inlet (11) is lower than the height of the circuit board (3), while the height of the air outlet (12) is higher than the height of the circuit board (3).

6. The easily detachable temperature-controlled electronic nose air chamber according to claim 2, characterized in that, A connecting plate (14) is circumferentially installed at the open end of the main body (1). The sealing gasket (7) is sandwiched between the connecting plate (14) and the air cover (2). Several bolts (8) are circumferentially spaced, and one end of the bolt (8) passes through the air cover (2), the sealing gasket (7) and the connecting plate (14) in sequence before being fixed.

7. The easily detachable temperature-controlled electronic nose air chamber according to claim 6, characterized in that, The bolt (8) is a treasury bolt (8).

8. The easily detachable temperature-controlled electronic nose air chamber according to claim 1, characterized in that, The control component (9) includes a microprocessor unit, a temperature acquisition unit and a signal acquisition unit. The temperature sensor (6) is connected to the temperature acquisition unit. The temperature acquisition unit and the heating film (4) are both connected to the microprocessor unit. The gas sensor unit (5) is connected to the signal acquisition unit.

9. A temperature-controlled electronic nose air chamber that is easy to disassemble according to claim 8, characterized in that, The easily detachable temperature-controlled electronic nose air chamber also includes a cable (a), the temperature sensor (6) is connected to the temperature acquisition unit through the cable (a), the gas sensor unit (5) is conditioned by the circuit board (3), the circuit board (3) is connected to the signal acquisition unit through the cable (a), and the heating film (4) is connected to the microprocessor unit through the cable (a).

10. A detachable temperature-controlled electronic nose air chamber according to any one of claims 1-9, characterized in that, The circuit board (3) is equipped with several sensor sockets, the gas sensor unit (5) includes several gas sensors, and the temperature sensor (6) and several of the gas sensors are inserted into the corresponding sensor sockets.

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