A portable pluggable electronic nose system

Abstract

The utility model discloses a portable pluggable electronic nose system belongs to electronic nose technical field, especially relates to, the problem that the use cost is high caused by the smell sensor of existing electronic nose system is not easy to disassemble and replace is solved, specific including sensor circuit board and electronic nose mainboard, be provided with sensor assembly on sensor circuit board, and the signal processing circuit is integrated on electronic nose mainboard, sensor circuit board and electronic nose mainboard between through physical pluggable interface connection. In the utility model, when the performance of single or multiple sensors in sensor assembly declines or is damaged, only need to pull down sensor circuit board from electronic nose mainboard through physical pluggable interface, and then replace new sensor circuit board, easy to maintain, and the use cost is reduced significantly. In addition, when carrying out the smell detection of different scenes, also can replace through the physical pluggable interface and pull down sensor circuit board, make the whole electronic nose system suitable for a variety of application scenarios, and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of electronic nose technology, and in particular to a portable pluggable electronic nose system. Background Technology

[0002] An electronic nose system is a gas detection device that mimics the biological olfactory mechanism. It uses a multi-sensor array to identify and analyze volatile gas components and is widely used in environmental monitoring, food safety, medical diagnostics, and industrial safety. In recent years, with the development of the Internet of Things and portable devices, higher demands have been placed on the miniaturization, maintainability, and cost control of electronic noses.

[0003] Most electronic nose systems on the market today adopt an integrated design, with the sensor module and signal processing circuitry fixedly packaged on the same motherboard. This design has the following significant drawbacks:

[0004] 1. High maintenance costs: Odor sensors are easily damaged components, and prolonged exposure to complex gas environments can lead to decreased sensitivity or failure. Traditional integrated electronic noses require replacing the entire mainboard when the odor sensor fails, resulting in wasted resources and significantly increased maintenance costs.

[0005] 2. Insufficient flexibility: Different application scenarios require different types or numbers of odor sensors, such as metal oxide, electrochemical and PID sensors; however, existing electronic nose systems are difficult to quickly replace odor sensor combinations, resulting in low equipment reuse rate and high cost.

[0006] 3. Limited portability: The high-density integration of the odor sensor and processing circuit increases the motherboard area, which is not conducive to the miniaturization of the device, especially in wearable or mobile scenarios where it is less adaptable.

[0007] Therefore, in view of the above-mentioned defects of existing electronic nose systems, this utility model proposes a portable pluggable electronic nose system. Utility Model Content

[0008] To address the shortcomings of existing technologies, this invention provides a portable, pluggable electronic nose system, which solves the problem of high operating costs caused by the difficulty in disassembling and replacing odor sensors in existing electronic nose systems.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A portable, pluggable electronic nose system includes a sensor circuit board and an electronic nose main board. The sensor circuit board is equipped with sensor components, and the electronic nose main board integrates signal processing circuitry. The sensor circuit board and the electronic nose main board are connected by a physical pluggable interface.

[0011] In this solution, the sensor assembly is integrated onto the sensor circuit board, serving as an independently replaceable consumable unit. When the performance of one or more sensors in the sensor assembly deteriorates or fails, the sensor circuit board can simply be removed from the electronic nose's mainboard via a physical pluggable interface, and a new sensor circuit board can be replaced. This simplifies maintenance and significantly reduces operating costs. Furthermore, when different sensor assemblies are required for odor detection in different scenarios, the old sensor circuit board can also be removed via the physical pluggable interface and replaced with a suitable one. This makes the entire electronic nose system suitable for various application scenarios and convenient to use.

[0012] Furthermore, the physically pluggable interface includes a pin header connector disposed on the sensor circuit board and a female header connector disposed on the electronic nose motherboard; the pin header connector and the female header connector are plugged in.

[0013] In this solution, the mating connection of the pin header connector and the female header connector enables the rapid separation and assembly of the sensor circuit board and the electronic nose motherboard, forming a replaceable modular structure.

[0014] Furthermore, the sensor assembly includes multiple odor sensors, all of which are integrated on a sensor circuit board.

[0015] In this solution, multiple gas sensors can be combined in different types or quantities according to the needs of the detection scenario.

[0016] Furthermore, the signal processing circuit includes an operational amplifier module, a microprocessor, a power supply regulator module, and a serial communication module integrated on the sensor circuit board; the odor sensor is electrically connected to the operational amplifier module, the operational amplifier module is electrically connected to the microprocessor, the microprocessor is electrically connected to the serial communication module, and the serial communication module is connected to the host computer.

[0017] The serial communication module is also electrically connected to the power supply regulator module, which in turn is electrically connected to the odor sensor and the microprocessor.

[0018] In this solution, an odor sensor is used to collect odor signals and transmit them to an operational amplifier module. The odor signals are then transmitted to the microprocessor's eight ADC sampling channels for analog-to-digital conversion via the operational amplifier module, and finally transmitted to the host computer via a serial communication module. The host computer provides an initial voltage of 5V through the serial communication module, which is then converted to 3.3V and 2.5V by a power supply regulator module to power the microprocessor and odor sensor, respectively.

[0019] Furthermore, eight odor sensors are integrated on the sensor circuit board;

[0020] The operational amplifier module includes eight independent operational amplifier channels, which amplify the signals from the eight odor sensors respectively.

[0021] Furthermore, the sensor circuit board is 66mm long and 65mm wide.

[0022] Furthermore, the electronic nose motherboard is 137mm long and 99mm wide.

[0023] The portable, pluggable electronic nose system of this invention has the following advantages:

[0024] Ease of maintenance and cost control. The sensor circuit board and the electronic nose mainboard are connected via a physically pluggable interface; the sensor circuit board is an independent consumable, and only the sensor circuit board needs to be replaced when it is damaged. In the entire electronic nose system, the sensor circuit board accounts for less than 20% of the system cost, while the electronic nose mainboard accounts for 80% of the system cost. Therefore, the electronic nose mainboard can be reused, which can significantly reduce long-term maintenance costs.

[0025] It has strong scene adaptability. When performing odor detection in different scenarios, users can freely replace the sensor circuit board equipped with different types of odor sensors (such as those dedicated to CO, VOCs, and H2S) according to their detection needs, without having to repurchase the entire electronic nose system, thus improving the reusability of the device and reducing user costs.

[0026] Ultimately portable design. The sensor circuit board and electronic nose mainboard are designed with separate structures to optimize space utilization. The electronic nose mainboard integrates high-density circuitry, and the sensor circuit board is also miniaturized, realizing the miniaturization of the electronic nose system and making it easy to carry.

[0027] Connection reliability and compatibility. The pin header and female header connectors provide a stable mechanical structure and electrical connection, support hot-swapping operations, and avoid data packet loss; the standardized interface protocol ensures the universality of different sensor circuit boards. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a portable pluggable electronic nose system according to the present invention;

[0029] Figure 2 This is a structural schematic diagram of a portable, pluggable electronic nose system according to this utility model from another perspective.

[0030] Figure 3 This is a signal flow diagram of a portable, pluggable electronic nose system according to the present invention.

[0031] Figure label:

[0032] 1. Sensor circuit board; 2. Electronic nose mainboard; 3. Odor sensor; 4. Pin header connector; 5. Female header connector; 6. Serial communication module; 7. Operational amplifier module; 8. Microprocessor; 9. Power supply regulator module; Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0034] like Figure 1 and Figure 2 As shown, this embodiment provides a portable, pluggable electronic nose system. In this system, the sensor assembly is integrated onto a sensor circuit board 1, serving as an independently replaceable consumable unit. When the sensor assembly's performance degrades or is damaged, only the sensor circuit board 1 needs to be replaced. Specifically, this portable, pluggable electronic nose system includes:

[0035] Sensor circuit board 1, electronic nose mainboard 2, sensor assembly, signal processing circuit and physical pluggable interface;

[0036] The system comprises a sensor circuit board 1 housing sensor components and an electronic nose mainboard 2 integrating signal processing circuitry. The sensor circuit board 1 and the electronic nose mainboard 2 are connected via a physically pluggable interface. When the performance of one or more sensors in the sensor components deteriorates or fails, simply unplug the sensor circuit board 1 from the electronic nose mainboard 2 via the physically pluggable interface and replace it with a new one. This simplifies maintenance and significantly reduces operating costs. Furthermore, when different sensor components are required for odor detection in different scenarios, the old sensor circuit board 1 can be unplugged via the physically pluggable interface and replaced with a suitable one. The electronic nose mainboard 2, as a reusable core functional unit, continues to operate after the sensor circuit board 1 is replaced, making the entire electronic nose system suitable for various application scenarios and easy to use.

[0037] The physical pluggable interface includes a pin header connector 4 on the sensor circuit board 1 and a female header connector 5 on the electronic nose main board 2. The pin header connector 4 and the female header connector 5 are connected to each other to enable the sensor circuit board 1 and the electronic nose main board 2 to be quickly separated and combined to form a replaceable modular structure.

[0038] The pin header connector 4 is located on one side edge of the sensor circuit board 1, and the female header connector 5 is located on the edge of the electronic nose main board 2 corresponding to the pin header connector 4.

[0039] As a preferred embodiment, the pin header connector 4 and the female header connector 5 adopt an industrial standard pin header-female header connector with a pitch of 2.5mm to ensure the stability of the connection and the reliability of electrical conduction.

[0040] The sensor assembly includes multiple odor sensors 3, all integrated on the sensor circuit board 1. In practical applications, different types or quantities of the multiple gas sensors can be combined according to the requirements of the detection scenario.

[0041] The signal processing circuit includes an operational amplifier module 7, a microprocessor 8, a power supply regulator module 9, and a serial communication module 6 integrated on the sensor circuit board 1. The odor sensor 3 is electrically connected to the operational amplifier module 7, the operational amplifier module 7 is electrically connected to the microprocessor 8, the microprocessor 8 is electrically connected to the serial communication module 6, and the serial communication module 6 is connected to the host computer. The serial communication module 6 is also electrically connected to the power supply regulator module 9, and the power supply regulator module 9 is electrically connected to both the odor sensor 3 and the microprocessor 8.

[0042] The preferred host computer is a mobile phone, which is powered by the phone and displays the collected sensor data on the mobile phone, which is beneficial to the portability of the whole device.

[0043] The sensor circuit board 1 integrates eight odor sensors 3; the operational amplifier module 7 includes eight independent operational amplifier channels, which amplify the signals of the eight odor sensors 3 respectively.

[0044] As a preferred embodiment, the sensor circuit board 1 has a length of 66mm and a width of 65mm.

[0045] As a preferred embodiment, the electronic nose motherboard 2 has a length of 137mm and a width of 99mm.

[0046] As a preferred embodiment, the operational amplifier module 7 is an LMV324; a single LMV324 has 4 channels, and in this embodiment, two LMV324s are used to form 8 channels.

[0047] As a preferred embodiment, the microprocessor 8 is an STM32F103RCT6.

[0048] As a preferred embodiment, the power supply regulator module 9 is model AMS1117-3.3 and AMS1117-2.5; wherein, AMS1117-3.3 is used to convert 5V voltage to 3.3V, and AMS1117-2.5 is used to convert 5V voltage to 2.5V.

[0049] As a preferred embodiment, the pin header connector 4 and the female header connector 5 can be 2×9P connectors.

[0050] The working principle of this embodiment is as follows:

[0051] like Figure 3 As shown, when the portable pluggable electronic nose system provided in this embodiment is working, the odor sensor 3 is used to collect odor signals and transmit them to the operational amplifier module 7. The odor signals are transmitted to the eight ADC sampling channels of the microprocessor 8 through the operational amplifier module 7 to complete the analog-to-digital conversion, and the data is transmitted to the mobile phone through the serial communication module 6.

[0052] Meanwhile, the serial communication module 6 also serves as the power supply for the entire system. The mobile phone provides an initial voltage of 5V through the serial communication module 6, which is then converted into 3.3V and 2.5V by the power supply regulator module 9, respectively, to power the microprocessor 8 and the odor sensor 3.

[0053] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A portable, pluggable electronic nose system, characterized in that: It includes a sensor circuit board (1) and an electronic nose main board (2). The sensor circuit board (1) is provided with a sensor assembly, and the electronic nose main board (2) integrates a signal processing circuit. The sensor circuit board (1) and the electronic nose main board (2) are connected by a physical pluggable interface.

2. The portable pluggable electronic nose system according to claim 1, characterized in that: The physical pluggable interface includes a pin header connector (4) disposed on the sensor circuit board (1) and a female header connector (5) disposed on the electronic nose motherboard (2); the pin header connector (4) and the female header connector (5) are plugged in.

3. The portable pluggable electronic nose system according to claim 1, characterized in that: The sensor assembly includes multiple odor sensors (3), all of which are integrated on the sensor circuit board (1).

4. The portable pluggable electronic nose system according to claim 3, characterized in that: The signal processing circuit includes an operational amplifier module (7), a microprocessor (8), a power supply regulator module (9), and a serial communication module (6) integrated on the sensor circuit board (1); the odor sensor (3) is electrically connected to the operational amplifier module (7), the operational amplifier module (7) is electrically connected to the microprocessor (8), the microprocessor (8) is electrically connected to the serial communication module (6), and the serial communication module (6) is connected to the host computer; The serial communication module (6) is also electrically connected to the power supply regulator module (9), which is electrically connected to the odor sensor (3) and the microprocessor (8) respectively.

5. The portable pluggable electronic nose system according to claim 4, characterized in that: The sensor circuit board (1) integrates eight of the odor sensors (3); The operational amplifier module (7) includes 8 independent operational amplifier channels, which amplify the signals of the 8 odor sensors (3) respectively.

6. The portable pluggable electronic nose system according to any one of claims 1 to 5, characterized in that: The sensor circuit board (1) has a length of 66mm and a width of 65mm.

7. The portable pluggable electronic nose system according to any one of claims 1 to 5, characterized in that: The electronic nose motherboard (2) is 137mm long and 99mm wide.

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