Automatic soil thermal cracking gas collection and analysis device

Abstract

The utility model discloses an automatic soil thermal cracking gas collection and analysis device which comprises a support frame, a temperature control box and a gas analysis chamber are arranged in the support frame, and a cracking furnace is mounted at the top of the support frame. A quartz three-way pipe in the cracking furnace is provided with a quartz boat, a first electromagnetic valve and a second electromagnetic valve which are respectively connected with a vacuum pump, a first gas conveying hose and a second gas conveying hose; and the gas analysis chamber comprises a gas sensor and is connected with the three-way electromagnetic valve through a third gas conveying hose. The device is integrated with a sensor signal processing module, a sensor signal acquisition module based on an FPGA (Field Programmable Gate Array) and a gas circuit automatic control module based on an Arduino singlechip. A cracking furnace is used for cracking a soil sample, a gas sensor is used for analyzing gas components, all the modules cooperate to convert and collect sensor signals and transmit the signals to an upper computer for predicting soil nutrients, meanwhile, opening and closing of a gas path are automatically controlled, and full-process automatic operation from cracking, gas transmission, gas component analysis and gas exhaust to soil nutrient analysis is achieved.

Description

Technical Field

[0001] This utility model relates to the field of soil analysis technology, specifically to an automated soil pyrolysis gas collection and analysis device. Background Technology

[0002] Soil nutrient testing is a fundamental task in modern agriculture and environmental protection. Its core function is to scientifically assess soil fertility and provide a basis for agricultural management, ecological protection, and rational resource utilization.

[0003] Traditional methods for soil nutrient testing mostly employ chemical analysis, which is generally cumbersome, time-consuming, costly, and potentially destructive. This not only results in lengthy and inefficient testing procedures but also poses risks to personnel due to the use of chemical reagents, and increases the environmental risks associated with laboratory wastewater and waste disposal. Therefore, driven by both precision agriculture and green analysis technologies, there is an urgent need to develop an automated soil pyrolysis gas collection and analysis device based on machine olfaction technology to achieve efficient soil nutrient detection. Utility Model Content

[0004] The purpose of this utility model is to provide an automated soil pyrolysis gas collection and analysis device to solve the problems mentioned in the background art, such as the cumbersome operation, high cost, long time consumption, high destructiveness, and potential harm to testing personnel caused by chemical analysis methods. To solve the above technical problems, this utility model provides the following technical solution: an automated soil pyrolysis gas collection and analysis device, including a support frame, a temperature control box installed inside the support frame, the temperature control box being connected to a pyrolysis furnace via a dedicated connecting cable, a pyrolysis furnace installed on the top of the support frame, a quartz three-way tube installed inside the pyrolysis furnace, a quartz boat for carrying the soil to be tested being placed inside the quartz three-way tube, a first solenoid valve and a second solenoid valve respectively installed at the left and right ends of the quartz three-way tube, the outlet of the first solenoid valve being installed at the inlet of a first gas delivery hose, the outlet of the first gas delivery hose being installed at the inlet of a vacuum pump, the inlet of the second solenoid valve being installed at the outlet of a second gas delivery hose, a gas analysis chamber inside the support frame, a gas sensor installed inside the gas analysis chamber, and the bottom of the gas analysis chamber... The outlet end of the first gas supply hose is installed at the inlet end of the third gas supply hose, and the outlet end of the third gas supply hose is installed at the inlet end of the three-way solenoid valve. The exhaust end of the three-way solenoid valve is equipped with an exhaust pipe, and the outlet end of the three-way solenoid valve is installed at the inlet end of the second gas supply hose. A sensor signal processing module is installed inside the support frame. The signal input end of the sensor signal processing module is connected to the gas sensor, and the signal output end of the sensor signal processing module is connected to the signal input end of the FPGA-based sensor signal acquisition module. The signal output end of the FPGA-based sensor signal acquisition module is connected to the display screen. An Arduino-based gas circuit automation control module is installed inside the support frame. The Arduino-based gas circuit automation control module is connected to the first solenoid valve, the second solenoid valve, the three-way solenoid valve, and the vacuum pump, respectively.

[0005] Preferably, a temperature control box is installed at one end of the support frame, and the control signal output terminal of the temperature control box is connected to the pyrolysis furnace via a dedicated connection line.

[0006] Preferably, a quartz plug is installed at the unconnected gas supply end of the quartz tee.

[0007] Preferably, the outlet end of the first gas delivery hose is fixedly connected to the inlet end of the gas analysis chamber.

[0008] Preferably, the inlet end of the second air supply hose is fixedly connected to the outlet end of the three-way solenoid valve.

[0009] Preferably, the exhaust end of the three-way solenoid valve is fixedly connected to an exhaust pipe.

[0010] Preferably, the gas sensor is connected to the sensor signal processing module using a ribbon cable.

[0011] Preferably, the sensor signal processing module is connected to the FPGA-based sensor signal acquisition module using a ribbon cable.

[0012] Preferably, the FPGA-based sensor signal acquisition module is connected to the display screen using an HDMI cable.

[0013] Preferably, the first solenoid valve, the second solenoid valve, the three-way solenoid valve, and the vacuum pump are each connected to the air circuit automation control module based on an Arduino microcontroller using ribbon cables.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0015] This invention involves removing the quartz plug from a quartz tee tube, placing a soil sample into a quartz boat, and then placing the soil sample into the quartz tee tube, resealing it with the quartz plug. The soil sample is then subjected to pyrolysis in a pyrolysis furnace. After a period of pyrolysis, the furnace stops heating. At this point, an Arduino-based automated gas path control module controls the first solenoid valve, activating the vacuum pump. The vacuum pump allows the pyrolysis gas to flow, which then flows into the gas analysis chamber through a first gas delivery hose. The gas sensor detects the target gas, and the sensitive resistor within the sensor generates a response. The sensor signal processing module converts the resistance signal into a voltage signal, which is then connected via a ribbon cable to an FPGA-based... The sensor signal acquisition module displays the data on an external display screen via the sensor signal processing module. Gas flows through the third gas delivery hose to the three-way solenoid valve, then through the second gas delivery hose connected to the three-way solenoid valve. The second solenoid valve outside the second gas delivery hose is opened, allowing the gas to return to the quartz three-way tube, thus achieving gas circulation. After acquisition, the exhaust pipe of the three-way solenoid valve is opened, allowing the entire system to exhaust. Simultaneously, the FPGA-based sensor signal acquisition module saves the data and inputs it into the host computer. The host computer uses algorithms to extract features from the data, reduce the dimensionality of the feature space, and apply pattern recognition algorithms to predict soil nutrients. Through these steps, the entire process from pyrolysis, gas delivery, gas composition analysis, exhaust to soil nutrient analysis is automated. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This is a perspective view of the quartz tee tube of this utility model;

[0018] Figure 3 This is a cross-sectional view of the overall process of this utility model;

[0019] Figure 4 This is the data processing procedure of this utility model;

[0020] The components include: 1. Support frame; 11. Pyrolysis furnace; 12. Quartz tee tube; 13. First gas delivery hose; 14. Second gas delivery hose; 15. First solenoid valve; 16. Second solenoid valve; 17. Gas analysis chamber; 18. Gas sensor; 19. Third gas delivery hose; 101. Three-way solenoid valve; 102. Temperature control box; 103. Sensor signal processing module; 104. FPGA-based sensor signal acquisition module; 105. Display screen; 106. Arduino-based gas circuit automation control module; 107. Vacuum pump. 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] This utility model provides the following technical solution:

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4An automated soil pyrolysis gas collection and analysis device includes a support frame 1. A temperature control box 102 is installed inside the support frame 1. The temperature control box 102 is connected to a pyrolysis furnace 11 via a dedicated connecting cable. The pyrolysis furnace 11 is mounted on top of the support frame 1. A quartz three-way tube 12 is installed inside the pyrolysis furnace 11. A quartz boat for carrying the soil to be tested can be placed inside the quartz three-way tube 12. A first solenoid valve 15 and a second solenoid valve 16 are respectively installed at the left and right ends of the quartz three-way tube 12. The outlet of the first solenoid valve 15 is installed at the inlet of a first gas delivery hose 13. The outlet of the first gas delivery hose 13 is installed at the inlet of a vacuum pump 107. The inlet of the second solenoid valve 16 is installed at the outlet of a second gas delivery hose 14. A gas analysis chamber 17 is located inside the support frame 1. A gas sensor 18 is installed inside the gas analysis chamber 17. The bottom outlet of the gas analysis chamber 17 is installed at the inlet of a third gas delivery hose 19. The outlet of 19 is installed at the inlet of the three-way solenoid valve 101. The exhaust end of the three-way solenoid valve 101 is equipped with an exhaust pipe. The outlet of the three-way solenoid valve 101 is installed at the inlet of the second gas delivery hose 14. A sensor signal processing module 103 is installed inside the support frame 1. The signal input of the sensor signal processing module 103 is connected to the gas sensor 18. The signal output of the sensor signal processing module 103 is connected to the signal input of the FPGA-based sensor signal acquisition module 104. The signal output of the FPGA-based sensor signal acquisition module 104 is connected to the display screen 105. An Arduino-based gas circuit automation control module 106 is installed inside the support frame 1. The Arduino-based gas circuit automation control module 106 is connected to the first solenoid valve 15, the second solenoid valve 16, the three-way solenoid valve 101, and the vacuum pump 107.

[0024] Using the above technical solution, the soil sample is placed into a quartz boat by removing the quartz plug from the quartz three-way tube 12. The quartz boat then carries the soil sample into the quartz three-way tube 12, where the quartz plug is reinserted and sealed. The soil sample is then subjected to pyrolysis in the pyrolysis furnace 11. After a period of pyrolysis, the pyrolysis furnace 11 stops heating. At this time, the gas path automation control module 106, based on an Arduino microcontroller, controls the first solenoid valve 15, and the vacuum pump 107 is opened. The vacuum pump 107 allows the pyrolysis gas to flow, and the pyrolysis gas flows into the gas analysis chamber 17 through the first gas delivery hose 13. The gas to be tested is detected by the gas sensor 18. The sensitive resistor in the gas sensor 18 generates a response, and the sensor signal processing module 103 processes the resistance signal into a voltage signal. The voltage signal converted by the gas sensor signal processing module 103 is then connected to the FPG-based... The sensor signal acquisition module 104 of A displays data on an external display screen 105. Gas flows through the third gas delivery hose 19 to the three-way solenoid valve 101, then through the second gas delivery hose 14 connected to the three-way solenoid valve 101. The second solenoid valve 16 outside the second gas delivery hose 14 is opened, allowing the gas to reach the quartz three-way tube 12 again, realizing the circulation of pyrolysis gas. After the acquisition is completed, the exhaust pipe of the three-way solenoid valve 101 is opened, allowing the entire system to exhaust. At the same time, the FPGA-based sensor signal acquisition module 104 saves the data and inputs it into the host computer. The host computer uses algorithms to extract features from the data, reduce the dimensionality of the feature space, and apply pattern recognition algorithms to predict soil nutrients. Through the above steps, the entire process from pyrolysis, gas delivery, gas composition analysis, exhaust to soil nutrient analysis is automated.

[0025] Specifically, a temperature control box 102 is installed at one end of the support frame 1, and the control signal output terminal of the temperature control box 102 is connected to the wire of the pyrolysis furnace 11.

[0026] Through the above technical solution, the heating power of the pyrolysis furnace 11 can be precisely adjusted through the temperature control box 102 to adapt to the thermal pyrolysis requirements of different soil types.

[0027] Specifically, a quartz plug is installed at the unconnected gas supply end of the quartz tee tube 12.

[0028] The above technical solution can seal the quartz tee tube 12 by setting a quartz plug, thereby improving the sealing performance.

[0029] Specifically, the outlet end of the first gas delivery hose 13 is fixedly connected to the inlet end of the gas analysis chamber 17.

[0030] Through the above technical solution, the connection between the first gas delivery hose 13 and the gas analysis chamber 17 allows the pyrolysis gas to enter the gas analysis chamber 17 along the first gas delivery hose 13.

[0031] Specifically, the inlet end of the second air supply hose 14 is fixedly connected to the outlet end of the three-way solenoid valve 101.

[0032] The above technical solution facilitates the connection between the second gas delivery hose 14 and the first gas delivery hose 13 by setting the three-way solenoid valve 101, thus ensuring airtightness.

[0033] Specifically, the exhaust end of the three-way solenoid valve 101 is fixedly connected to an exhaust pipe.

[0034] The above technical solution allows the gas to be discharged after the analysis is completed through the exhaust pipe.

[0035] Specifically, the gas sensor 18 is connected to the sensor signal processing module 103 using a ribbon cable.

[0036] Through the above technical solution, the gas sensor 18 detects the gas to be measured, and the sensitive resistor inside the gas sensor 18 generates a response, which is then processed into a voltage signal by the sensor signal processing module.

[0037] Specifically, the sensor signal processing module 103 is connected to the FPGA-based sensor signal acquisition module 104 using a ribbon cable.

[0038] The voltage signal converted by the sensor signal processing module 103 can be acquired through the above technical solution.

[0039] Specifically, the FPGA-based sensor signal acquisition module 104 is connected to the display screen 105 using an HDMI cable.

[0040] The above technical solution enables the visualization of data acquired by the FPGA-based sensor signal acquisition module 104, facilitating data analysis and comparison.

[0041] Specifically, solenoid valve 15, first solenoid valve 16, three-way solenoid valve 101, and vacuum pump 107 are connected to the Arduino microcontroller-based pneumatic automation control module 106 via ribbon cables.

[0042] With the above technical solution, operators can be freed from manually controlling the opening and closing of valves and the gas flow rate. By setting the valve and air pump operating parameters, all functions can be completed automatically.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated soil pyrolysis gas collection and analysis device, comprising a support frame (1), characterized in that: A temperature control box (102) is installed inside the support frame (1). The temperature control box (102) is connected to the pyrolysis furnace (11) via a dedicated connecting cable. The pyrolysis furnace (11) is installed on the top of the support frame (1). A quartz tee tube (12) is installed inside the pyrolysis furnace (11). A quartz boat for carrying the soil to be tested can be placed inside the quartz tee tube (12). A first solenoid valve (15) and a second solenoid valve (16) are installed at the left and right ends of the quartz tee tube (12), respectively. The first solenoid valve... The outlet of (15) is installed at the inlet of the first gas delivery hose (13), the outlet of the first gas delivery hose (13) is installed at the inlet of the vacuum pump (107), the inlet of the second solenoid valve (16) is installed at the outlet of the second gas delivery hose (14), the support frame (1) has a gas analysis chamber (17) inside, a gas sensor (18) is installed inside the gas analysis chamber (17), the bottom outlet of the gas analysis chamber (17) is installed at the inlet of the third gas delivery hose (19), the third The outlet end of the gas delivery hose (19) is installed at the inlet end of the three-way solenoid valve (101). An exhaust pipe is installed at the outlet end of the three-way solenoid valve (101). The outlet end of the three-way solenoid valve (101) is installed at the inlet end of the second gas delivery hose (14). A sensor signal processing module (103) is installed inside the support frame (1). The signal input end of the sensor signal processing module (103) is connected to the gas sensor (18), and the signal output end of the sensor signal processing module (103) is connected to an FPGA-based... The sensor signal acquisition module (104) is connected to the signal input terminal, and the FPGA-based sensor signal acquisition module (104) is connected to the display screen (105). The support frame (1) is equipped with an Arduino microcontroller-based automatic air circuit control module (106), which is connected to the first solenoid valve (15), the second solenoid valve (16), the three-way solenoid valve (101), and the vacuum pump (107).

2. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: A temperature control box (102) is installed at one end of the support frame (1), and the control signal output terminal of the temperature control box (102) is connected to the pyrolysis furnace (11) through a dedicated connection line.

3. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The quartz tee (12) has a quartz plug installed at the end not connected to the gas pipeline.

4. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The outlet end of the first gas delivery hose (13) is fixedly connected to the inlet end of the gas analysis chamber (17).

5. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The inlet end of the second air supply hose (14) is fixedly connected to the outlet end of the three-way solenoid valve (101).

6. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The exhaust end of the three-way solenoid valve (101) is fixedly connected to an exhaust pipe.

7. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The gas sensor (18) is connected to the sensor signal processing module (103) via a ribbon cable.

8. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The sensor signal processing module (103) is connected to the FPGA-based sensor signal acquisition module (104) via a ribbon cable.

9. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The FPGA-based sensor signal acquisition module (104) is connected to the display screen (105) using an HDMI cable.

10. The automated soil pyrolysis gas collection and analysis device according to claim 1, characterized in that: The first solenoid valve (15), the second solenoid valve (16), the three-way solenoid valve (101), and the vacuum pump (107) are connected to the air circuit automation control module (106) based on the Arduino microcontroller using ribbon cables.

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