A modularly integrated gas data acquisition instrument with multiple sensors

Abstract

This utility model belongs to the field of sensor technology, specifically a multi-sensor modular integrated gas data acquisition instrument, comprising: a main cylinder, which is detachably connected by multiple outer cylinders; an inner cavity, disposed within the main cylinder, including a detection chamber for installing a gas pretreatment unit and a control chamber for installing a main control board and a communication module, wherein the detection chamber and the control chamber are isolated by a pressure balancing valve; and a top cover, connected to the main cylinder, equipped with a switch, buttons, a communication interface, and the electronic module for data acquisition, processing, and transmission. This utility model, through its mechanically connected multiple outer cylinders and dual-chamber structure of the inner cavity, facilitates equipment maintenance; and through multi-sensor fusion technology combined with a dynamic environmental temperature and humidity compensation algorithm, effectively reduces cross-sensitivity and baseline drift problems.

Description

Technical Field

[0001] This utility model belongs to the field of sensor technology, specifically a multi-sensor modular integrated gas data acquisition instrument. Background Technology

[0002] Traditional electrochemical / semiconductor gas sensors: These sensors use electrochemical principles or metal oxide semiconductor materials to detect gas concentration and are commonly used for industrial field monitoring. The sensors are buried directly underground or collect gas through conduits, relying on wired data transmission to ground terminals. Laboratory-based gas chromatography analysis: This involves periodically collecting underground gas samples and sending them to a laboratory for high-precision component analysis using gas chromatography (GC) or mass spectrometry (MS). This requires manual operation and offline data processing. Wireless sensor network (WSN) monitoring systems: These systems deploy multiple distributed gas sensor nodes, networked using wireless communication protocols such as ZigBee and LoRa, to achieve regional gas concentration monitoring. Some systems integrate temperature and humidity compensation algorithms. Monitoring platforms combining the Internet of Things (IoT) and AI: These platforms centrally process data from multiple nodes through a cloud platform, combining machine learning algorithms to predict gas diffusion trends. Some systems support remote alarm functions on mobile devices.

[0003] Problems and shortcomings of existing technologies: Limitations of traditional sensors:

[0004] Insufficient sensitivity and interference resistance: Electrochemical sensors are susceptible to fluctuations in underground temperature and humidity, leading to baseline drift; semiconductor sensors exhibit cross-sensitivity to multiple gases, resulting in a high false alarm rate. Lifespan and maintenance costs: Long-term underground burial of sensors makes them vulnerable to corrosion and moisture intrusion, causing rapid electrode aging and frequent replacement, resulting in high maintenance costs. Wired transmission limitations: Reliance on cable data transmission leads to complex wiring that is susceptible to damage from geological activity, making it unsuitable for large-scale distributed monitoring needs. Utility Model Content

[0005] To address the problems existing in the above-mentioned background technology, this utility model proposes a multi-sensor modular integrated gas data acquisition instrument.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A modularly integrated gas data acquisition instrument with multiple sensors includes a mechanical housing and an electronic module installed within the mechanical housing. The housing includes:

[0008] The main body is composed of multiple detachable outer cylinders connected together;

[0009] The inner cavity, located within the main cylinder, includes a detection chamber for installing a gas pretreatment unit and a control chamber for installing a main control board and a communication module, and the detection chamber and the control chamber are isolated by a pressure balance valve.

[0010] The top cover, connected to the main cylinder, is equipped with a switch, buttons, and a communication interface;

[0011] The electronic module includes:

[0012] A multi-gas sensor array is connected to the main control chip via an I2C bus and is installed at the front end of the detection chamber, directly contacting the pre-treated gas at the air inlet.

[0013] Environmental sensors, including temperature and humidity sensors and barometric pressure sensors integrated via I2C interface, and water depth sensors that convert signals via chip;

[0014] The main control microcontroller is electrically connected to a communication module and a power module, which are used to coordinate the data acquisition, communication, positioning and power management of various sensors.

[0015] Preferably, the main cylinder includes a first outer cylinder, a second outer cylinder, a third outer cylinder, and a fourth outer cylinder, which can be sequentially threaded together to form a whole.

[0016] Preferably, the top cover is threaded to the top of the first outer cylinder, and the bottom of the first outer cylinder is provided with internal and external threads. The external thread is used to connect with the second outer cylinder, and the internal thread is used to connect with the upper end of the inner cavity. The bottom of the second outer cylinder is threaded to one end of the third outer cylinder, and the other end of the third outer cylinder is threaded to the fourth outer cylinder. The first outer cylinder, the second outer cylinder, the third outer cylinder, and the fourth outer cylinder form an internally hollow cavity structure to accommodate the inner cavity.

[0017] Preferably, the gas pretreatment unit uses a dust and moisture filter, which is installed in the front of the detection chamber.

[0018] Preferably, the fourth outer cylinder is provided with an air inlet, the position of which corresponds to the working end of the dust and moisture filter, so that the gas entering the detection chamber through the air inlet is completely processed by the dust and moisture filter.

[0019] Preferably, the microcontroller is an AIR780EG microcontroller.

[0020] Preferably, the temperature and humidity sensor is SPL06-001.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] The equipment is easy to maintain due to its mechanically connected multi-outer cylinder and double-compartment internal cavity structure.

[0023] By using multi-sensor fusion technology (such as complementary electrochemical sensing and infrared spectroscopy analysis) and combined with dynamic compensation algorithms for environmental temperature and humidity, the problems of cross sensitivity and baseline drift can be effectively reduced. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the cover structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal cavity structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the first outer cylinder structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the second outer cylinder structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the third outer cylinder structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the fourth outer cylinder structure of this utility model. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] A modularly integrated gas data acquisition instrument with multiple sensors includes a mechanical housing and an electronic module, with the electronic module installed inside the housing.

[0032] The outer casing includes:

[0033] Main body, reference Figure 3-6 It consists of four detachable outer cylinders, specifically:

[0034] It is composed of a first outer cylinder 6, a second outer cylinder 3, a third outer cylinder 4, and a fourth outer cylinder 5. The top of the first outer cylinder is provided with an M86 internal thread 601, and the bottom is provided with an M46 external thread A602 and an M35 internal thread (not shown in the figure). One end of the second outer cylinder 3 is provided with an M46 internal thread A301, and the other end is provided with an M46 external thread B302. The M46 internal thread A301 is connected to the M46 external thread A602. One end of the third outer cylinder 4 is provided with an M46 internal thread B401, and the other end is provided with an M46 external thread C402. The M46 external thread B302 is connected to the M46 internal thread B401. One end of the fourth outer cylinder 5 is provided with an M46 internal thread C501, and the M46 external thread C402 is connected to the M46 internal thread C501. An air inlet (shown in the figure but not marked) is also provided on the fourth outer cylinder. The position of the air inlet corresponds to the working end of the dust and moisture filter, so that the gas entering the detection chamber through the air inlet is completely processed by the dust and moisture filter.

[0035] refer to Figure 2 The inner cavity 2, located within the main cylinder, includes a detection chamber 201 for installing the gas pretreatment unit and a control chamber 200 for installing the main control board and communication module. The detection chamber and the control chamber are isolated by a pressure balancing valve. One end of the inner cavity 202 has an M35 external thread 202, which connects to the M35 internal thread at the bottom of the first outer cylinder 6.

[0036] It should be noted that the control compartment 200 is provided with threaded holes for installing the main control board and communication module, and the detection compartment is provided with threaded holes for installing the dust and dehumidification filter.

[0037] refer to Figure 1 The top cover 1 is connected to the main cylinder and is equipped with a switch, buttons, a communication interface, and a handle. Its mounting end has an M86 external thread 101, which connects to an M86 internal thread 601.

[0038] The electronic module includes:

[0039] A multi-gas sensor array is connected to the main control chip via an I2C bus and installed at the front end of the detection chamber, directly contacting the pre-treated gas at the air inlet; environmental sensors include a temperature and humidity sensor and a pressure sensor integrated via an I2C interface, and a water depth sensor whose signal is converted via a chip; the main control microcontroller is electrically connected to a communication module and a power module, used to coordinate the data acquisition, communication, positioning and power management of each sensor.

[0040] It should be noted that the top cover has a built-in waterproof ring, and all interfaces, such as RS485 and USB, use silicone sealing plugs. An O-ring seal is installed between the top cover and the outer cylinder.

[0041] Working principle:

[0042] An air pump draws underground gas into the detection chamber through the inlet. The air pump can be installed in a suitable location within the housing, such as the top of the first outer cylinder. The gas then undergoes pretreatment through a dust and moisture filter to remove particulate matter and moisture. After pretreatment, the gas is distributed to various sensors. The electrochemical / infrared sensors output analog signals based on the gas characteristics, which are converted into digital signals by an ADC and then acquired and processed by the main control chip (air780G). This principle is similar to the signal acquisition and processing principles of existing sensors and will not be elaborated upon here.

[0043] Finally, the main control chip calculates the gas concentration through a multi-sensor fusion algorithm (dynamically compensating for temperature and humidity interference). Under normal conditions, the data is uploaded to the ground terminal via RS485. In wireless mode, the data is compressed by the 4G module and uploaded to the cloud.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-sensor modular integrated gas data acquisition instrument comprising a mechanical housing and an electronics module mounted within said mechanical housing, characterized by, The outer casing includes: The main body is composed of multiple detachable outer cylinders connected together; The inner cavity (2) is located inside the main cylinder and includes a detection chamber (201) for installing a gas pretreatment unit and a control chamber (200) for installing a main control board and a communication module. The detection chamber and the control chamber are isolated by a pressure balance valve. Top cover (1), connected to the main cylinder, is equipped with a switch, button and communication interface; The electronic module includes: A multi-gas sensor array is connected to the main control chip via an I2C bus and is installed at the front end of the detection chamber, directly contacting the pre-treated gas at the air inlet. Environmental sensors, including temperature and humidity sensors and barometric pressure sensors integrated via I2C interface, and water depth sensors that convert signals via chip; The main control microcontroller is electrically connected to a communication module and a power module, which are used to coordinate the data acquisition, communication, positioning and power management of various sensors.

2. A multi-sensor modular integrated gas data acquisition instrument according to claim 1, wherein, The main cylinder includes a first outer cylinder, a second outer cylinder, a third outer cylinder, and a fourth outer cylinder, which can be sequentially threaded together to form a whole.

3. A multi-sensor modular integrated gas data acquisition instrument according to claim 2, wherein, The top cover (1) is threaded to the top of the first outer cylinder (6). The bottom of the first outer cylinder is provided with an internal thread and an external thread (602). The external thread (602) is used to connect with the second outer cylinder (3), and the internal thread is used to connect with the upper end of the inner cavity (2). The bottom of the second outer cylinder (3) is threaded to one end of the third outer cylinder (4), and the other end of the third outer cylinder (4) is threaded to the fourth outer cylinder (5). The first outer cylinder, the second outer cylinder, the third outer cylinder, and the fourth outer cylinder form an internally hollow cavity structure to accommodate the inner cavity.

4. A multi-sensor modular integrated gas data acquisition instrument as claimed in claim 2, wherein, The gas pretreatment unit uses a dust and moisture filter, which is installed in the front of the detection chamber (201).

5. A multi-sensor modular integrated gas data acquisition instrument according to claim 4, characterized in that, The fourth outer cylinder is provided with an air inlet, the position of which corresponds to the working end of the dust and moisture filter, so that the gas entering the detection chamber through the air inlet is completely processed by the dust and moisture filter.

6. A multi-sensor modular integrated gas data acquisition instrument according to claim 1, wherein, The microcontroller used is the AIR780EG microcontroller.

7. The multi-sensor modular integrated gas data acquisition instrument of claim 1, wherein, The temperature and humidity sensor used is SPL06-001.

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