Monitoring device convenient for forest soil heterotrophic respiration measurement

Abstract

The invention discloses a monitoring device convenient for forest soil heterotrophic respiration measurement, which is characterized by comprising an intelligent gas flux measurement chamber, an analyzer and a processing mechanism, the processing mechanism comprises a rack assembly and an execution assembly; the machine frame assembly comprises a machine frame, symmetrical guide grooves are formed in the machine frame, and the machine frame is fixedly connected with a threaded cylinder. The executing assembly comprises symmetrical lifting frames, the symmetrical lifting frames are fixedly connected with U-shaped plates respectively, the U-shaped plates are fixedly connected with symmetrical guide transverse rods, and the symmetrical guide transverse rods penetrate through the sliding plates respectively. The invention relates to the technical field of monitoring, in particular to a monitoring device convenient for forest soil heterotrophic respiration measurement. The technical problem to be solved by the invention is to provide the monitoring device convenient for forest soil heterotrophic respiration measurement, after a quadrat is selected, grooving is conveniently realized, then a plastic film is extruded into a groove, and subsequent measurement and monitoring are conveniently realized.

Description

Technical Field

[0001] The invention relates to the field of monitoring technology, in particular to a monitoring device for measuring heterotrophic respiration of forest soil. Background Art

[0002] The portable soil respiration meter is an efficient and multifunctional soil testing tool that can monitor soil respiration and related parameters in real time, including changes in the concentration of gases such as carbon dioxide, water vapor, nitrous oxide, and methane in the soil, as well as environmental parameters such as temperature, humidity, and atmospheric pressure. The simultaneous monitoring of these parameters provides researchers with comprehensive and accurate data support, which helps to deeply analyze the complex mechanism of soil respiration.

[0003] At present, there is still a lack of a device that can facilitate grooving after selecting the sample plot, and then squeeze the plastic film into the groove to facilitate subsequent measurement and monitoring. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a monitoring device which is convenient for measuring heterotrophic respiration of forest soil, so that after selecting a sample plot, it is convenient to make grooves, and then squeeze a plastic film into the grooves, so as to facilitate subsequent measurement and monitoring.

[0005] The present invention adopts the following technical solutions to achieve the invention objectives:

[0006] A monitoring device for measuring heterotrophic respiration of forest soil, characterized in that it comprises: a gas flux intelligent measurement chamber, an analyzer and a processing mechanism; the processing mechanism comprises a frame assembly and an execution assembly; the frame assembly comprises a frame, the frame is provided with symmetrical guide grooves, and the frame is fixedly connected to a threaded cylinder; the execution assembly comprises a symmetrical lifting frame, the symmetrical lifting frames are respectively fixedly connected to U-plates, the U-plates are fixedly connected to symmetrical guide cross bars, the symmetrical guide cross bars pass through slides respectively, the slides are fixedly connected to mounting vertical bars, and the mounting vertical bars are fixedly connected to extrusion columns; the symmetrical lifting frames are respectively fixedly connected to guide cylinders, the symmetrical lifting frames are respectively fixedly connected to the upper ends of vertical springs, the symmetrical vertical springs are respectively fixedly connected to transverse guide blocks, and the symmetrical transverse guide blocks are respectively fixedly connected to the guide cylinders. The guide vertical rods are fixedly connected, and the symmetrical vertical springs are respectively looped around the corresponding guide vertical rods, and the symmetrical guide vertical rods are respectively arranged in the corresponding guide cylinders; the symmetrical transverse guide blocks are respectively provided with guide transverse rods, and the symmetrical transverse guide blocks are respectively fixedly connected with transverse springs, and the symmetrical transverse springs are respectively looped around the corresponding guide transverse rods, and the symmetrical transverse springs and the symmetrical guide transverse rods are respectively fixedly connected with the mounting vertical plates; the symmetrical mounting vertical plates are respectively rotatably connected with the symmetrical parallel rods, and the extrusion columns contact the parallel rods on the upper side; the parallel rods on the lower side are detachably fixedly connected with the first mounting bar, and the first mounting bar is fixedly connected with the saw blade cover, and the saw blade is installed in the saw blade cover; the parallel rods on the lower side are detachably fixedly connected with the first mounting plate, and the first mounting plate is fixedly connected with the extrusion roller.

[0007] As a further limitation of the present technical solution, the U-plate is fixedly connected to the arc plate, the arc plate is fixedly connected to the dual-axis motor, the upper output shaft of the dual-axis motor is fixedly connected to the screw, the screw is threadedly connected to the threaded barrel, the lower output shaft of the dual-axis motor is fixedly connected to the crank, the crank is fixedly connected to the power circular shaft, the power circular shaft is arranged in a movable groove, and the movable groove is fixedly connected to the slide plate.

[0008] As a further limitation of this technical solution, its method of use is as follows:

[0009] S1: Install the gas flux intelligent measurement chamber and the analyzer;

[0010] S2: Select a 1m×1m sample plot and use the equipment to make the saw blade dig a suitable depth on the four sides of the sample plot;

[0011] S3: Replace the squeezing roller, lay the plastic film on one of the grooves of the dug edge, with the middle of the plastic film on the groove, so that the squeezing roller squeezes the plastic film into the groove alternately;

[0012] S4: All four edges execute S3 to achieve root elimination and isolation.

[0013] S5: operating the gas flux intelligent measurement chamber and the analyzer to monitor heterotrophic respiration.

[0014] As a further limitation of the present technical solution, the length of the plastic film in S3 is equal to the length of the groove, and the width is greater than twice the depth of the groove, so that there is just enough left after pressing down.

[0015] As a further limitation of the technical solution, the mounting vertical plate and the parallel rods form a parallelogram mechanism. When the extrusion column reciprocates, the two sides of the parallel rods are alternately pressed down while gradually moving downward, solving the time-consuming and labor-intensive problem of manual grooving and pressing in plastic film.

[0016] As a further limitation of the present technical solution, the contact point between the parallel rod and the extrusion column constitutes a movable fulcrum of the lever. When alternately extruding the plastic film or grooving, power × the distance from the fulcrum to the line of action of the power = resistance × the distance from the fulcrum to the line of action of the resistance, that is, power × power arm = resistance × resistance arm.

[0017] As a further limitation of the technical solution, the U-plate is provided with a notch corresponding to the mounting vertical rod.

[0018] As a further limitation of the technical solution, the symmetrical lifting frames are respectively fixedly connected to guide blocks, and the symmetrical guide blocks are respectively nested in the corresponding guide grooves.

[0019] As a further limitation of the technical solution, the frame is fixedly connected to symmetrical mounting plates, and the symmetrical mounting plates are respectively bearing-connected to the axles of the double wheels.

[0020] As a further limitation of the technical solution, the frame is fixedly connected to a handle.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are:

[0022] 1. The gas flux intelligent measurement chamber of this device has built-in CO2 sensors, H2O sensors and CH4 sensors to monitor relevant soil data. The synchronous monitoring of these parameters provides comprehensive and accurate data support for scientific researchers, which helps to deeply analyze the complex mechanism of soil respiration.

[0023] 2. This device uses a dual-axis motor and a screw and a threaded barrel to achieve the downward movement of the actuator as a whole; the contact point between the parallel rod and the extrusion column constitutes the active fulcrum of the lever. When alternately extruding the plastic film or grooving, the power × the distance from the fulcrum to the line of action of the power = resistance ×

[0024] The distance from the fulcrum to the line of action of the resistance, that is, power × power arm = resistance × resistance arm; the vertical plate and the parallel rods are installed to form a parallelogram mechanism. When the extrusion column reciprocates, the two sides of the parallel rods are alternately pressed down and gradually move downward, which solves the time-consuming and labor-intensive problem of manual grooving and pressing in plastic film.

[0025] 3. The gap in the groove is not large, and it is difficult to lower the plastic film when it is inserted manually. It needs to be inserted alternately from left to right. This equipment simulates manual operation and solves the problem of too much resistance and difficulty in lowering.

[0026] 4. The double-wheel design enables the machine to dig while moving, which can significantly improve its mobility and flexibility, making it easier to operate and use in different locations and environments. The wheel design can also reduce friction and resistance, improving the efficiency of the equipment. In addition, the wheels can also enhance the stability and durability of the equipment, extend its service life, and bring users a more convenient and efficient use experience.

[0027] 5. When encountering greater resistance, the alternating downward pressure and gradual movement of the device can better achieve buffering and prevent ordinary saw blades from getting stuck or blocked when encountering greater resistance when moving in a straight line. At the same time, pressure sensors can be set on the first mounting plate, parallel rods and other structures. When encountering greater pressure, the device is set to slow down or stop moving downward, and repeatedly perform alternating left and right pressure until thicker tree roots are cut off. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 .

[0029] Figure 2 The three-dimensional structure of the processing mechanism of the present invention is shown in FIG. Figure 1 .

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the execution component of the present invention.

[0031] Figure 4 It is a schematic diagram of the partial three-dimensional structure of the execution component of the present invention.

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the rack assembly of the present invention.

[0033] Figure 6 The three-dimensional structure of the processing mechanism of the present invention is shown in FIG. Figure 2 .

[0034] Figure 7 The three-dimensional structure of the processing mechanism of the present invention is shown in FIG. Figure 3 .

[0035] Figure 8 The three-dimensional structure of the present invention is shown in FIG. Figure 2 .

[0036] In the figure: 1. gas flux intelligent measurement chamber, 2. analyzer, 3. handle, 4. frame, 5. threaded cylinder, 6. guide cylinder, 7. mounting plate, 8. double wheels, 9. saw blade, 10. saw blade cover, 11. first mounting bar, 12. lifting frame, 13. guide groove, 14. screw, 15. dual-axis motor, 16. arc plate, 17. guide vertical rod, 18. vertical spring, 19. horizontal guide block, 20. guide cross rod, 21. cross spring, 22. extrusion roller, 23. first mounting plate, 24. parallel rod, 25. mounting vertical plate, 26. U plate, 27. guide cross rod, 28. guide block, 29. crank, 30. moving groove, 31. power circular shaft, 32. slide plate, 33. mounting vertical rod, 34. extrusion column. DETAILED DESCRIPTION

[0037] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0038] The present invention comprises: a gas flux intelligent measurement chamber 1, an analyzer 2 and a processing mechanism; the processing mechanism comprises a frame assembly and an execution assembly; the frame assembly comprises a frame 4, the frame 4 is provided with a symmetrical guide groove 13, the frame 4 is fixedly connected to a threaded cylinder 5; the execution assembly comprises a symmetrical lifting frame 12, the symmetrical lifting frame 12 is respectively fixedly connected to a U-plate 26, the U-plate 26 is fixedly connected to a symmetrical guide cross bar 27, the symmetrical guide cross bar 27 passes through a slide plate 32, the slide plate 32 is fixedly connected to a mounting vertical rod 33, the mounting vertical rod 33 is fixedly connected to an extrusion column 34; the symmetrical lifting frame 12 is respectively fixedly connected to a guide cylinder 6, the symmetrical lifting frame 12 is respectively fixedly connected to the upper end of a vertical spring 18, the symmetrical vertical spring 18 is respectively fixedly connected to a horizontal guide block 19, the symmetrical horizontal guide block 19 is respectively fixedly connected to a guide vertical rod 17, the symmetrical vertical spring The springs 18 are respectively looped around the corresponding guide vertical rods 17, and the symmetrical guide vertical rods 17 are respectively arranged in the corresponding guide cylinders 6; the symmetrical transverse guide blocks 19 are respectively provided with guide transverse rods 20, and the symmetrical transverse guide blocks 19 are respectively fixedly connected with transverse springs 21, and the symmetrical transverse springs 21 are respectively looped around the corresponding guide transverse rods 20, and the symmetrical transverse springs 21 and the symmetrical guide transverse rods 20 are respectively fixedly connected with the mounting vertical plates 25; the symmetrical mounting vertical plates 25 are respectively rotatably connected with the symmetrical parallel rods 24, and the extrusion columns 34 contact the upper parallel rods 24; the lower parallel rods 24 are detachably fixedly connected to the first mounting strip 11, and the first mounting strip 11 is fixedly connected to the saw blade cover 10, and the saw blade 9 is installed in the saw blade cover 10; the lower parallel rods 24 are detachably fixedly connected to the first mounting plate 23, and the first mounting plate 23 is fixedly connected to the extrusion roller 22.

[0039] In this embodiment, the U-plate 28 is fixedly connected to the arc plate 16, the arc plate 16 is fixedly connected to the dual-axis motor 15, the upper output shaft of the dual-axis motor 15 is fixedly connected to the screw 14, the screw 14 is threadedly connected to the threaded cylinder 5, the lower output shaft of the dual-axis motor 15 is fixedly connected to the crank 29, the crank 29 is fixedly connected to the power circular shaft 31, the power circular shaft 31 is arranged in the movable groove 30, and the movable groove 30 is fixedly connected to the slide plate 32.

[0040] The mounting vertical plate 25 and the parallel rod 24 form a parallelogram mechanism. When the extrusion column 34 reciprocates, the two sides of the parallel rod 24 are alternately pressed down and gradually moved downward, thereby solving the time-consuming and laborious problem of manually digging grooves and pressing in plastic films.

[0041] In this embodiment, the contact point between the parallel rod 24 and the extrusion column 34 constitutes a movable fulcrum of the lever. When alternately extruding the plastic film or grooving, power×the distance from the fulcrum to the power action line=resistance×the distance from the fulcrum to the resistance action line, that is, power×power arm=resistance×resistance arm.

[0042] The U plate 26 is provided with a notch corresponding to the mounting vertical rod 33 .

[0043] The symmetrical lifting frames 12 are respectively fixedly connected to the guide blocks 28 , and the symmetrical guide blocks 28 are respectively embedded in the corresponding guide grooves 13 .

[0044] The frame 4 is fixedly connected to the handle 3 .

[0045] The workflow of this embodiment is:

[0046] Move the device to a suitable location.

[0047] First, the saw blade 9 is used to make a groove, and the dual-axis motor 15 is controlled to rotate. The dual-axis motor 15 drives the screw 14 to rotate. The screw 14 cooperates with the threaded barrel 5 to realize the downward movement of the actuator as a whole, so that the guide block 28 moves downward along the guide groove 13. The dual-axis motor 15 drives the crank 29 to rotate, and the crank 29 drives the power circular shaft 31 to move in the moving groove 30. The moving groove 30 drives the slide plate 32 to move along the guide cross bar 27. The slide plate 32 drives the installation vertical rod 33 to move. The installation vertical rod 33 drives the extrusion column 34 to move, so that the extrusion column 34 drives the upper parallel rod 24 to swing, and the upper parallel rod 24 drives the installation vertical rod 25 to swing. The installation vertical rod 25 drives the guide cross bar 20 to swing back and forth and move along the transverse guide block 19 at the same time. The installation vertical rod 25 drives the transverse spring 21 to move, and the guide cross bar 20 drives the transverse guide block 19 to move. The transverse guide block 19 drives the guide vertical rod 17 to move, and the transverse guide block 19 drives the vertical spring 18 to move, so that the two ends of the parallel rod 24 are alternately lifted and lowered, and the lower parallel rod 24 drives the first mounting bar 11, the saw blade cover 10 and the two ends of the saw blade 9 to alternately move downward to realize grooving.

[0048] The middle position of the plastic film is placed on the groove, and then the squeezing roller 22 is used to alternately raise and lower the two ends of the squeezing roller 22 to squeeze the plastic film into the groove.

[0049] In this embodiment, after digging to a suitable depth, the next position is moved to dig.

[0050] The following embodiments are also included: the frame 4 is fixedly connected to a symmetrical mounting plate 7, and the symmetrical mounting plates 7 are respectively connected to the axles of the double wheels 8 by bearings.

[0051] The workflow of this embodiment is:

[0052] One side automatically rises and falls continuously, while the other side slowly pushes forward, making it easier to cut grooves and insert plastic film.

[0053] In this embodiment, the method of use is as follows:

[0054] S1: installing the gas flux intelligent measurement chamber 1 and the analyzer 2, wherein the gas flux intelligent measurement chamber 1 is connected to the analyzer 2 via cables, pipes, etc.;

[0055] S2: Select a 1m×1m sample plot, use the equipment to make the saw blade 9 dig a suitable depth on the four sides of the sample plot;

[0056] S3: Replace the squeezing roller 22, lay the plastic film on one of the grooves of the dug edge, with the middle of the plastic film on the groove, so that the squeezing roller 22 squeezes the plastic film into the groove alternately;

[0057] S4: All four edges execute S3 to achieve root elimination and isolation.

[0058] S5: operating the gas flux intelligent measurement chamber 1 and the analyzer 2 to monitor heterotrophic respiration.

[0059] The length of the plastic film in S3 is equal to the length of the groove, and the width is greater than twice the depth of the groove, so that there is just enough left after pressing down.

[0060] Also included are the following embodiments:

[0061] S1: installing the gas flux intelligent measurement chamber 1 and the analyzer 2, wherein the gas flux intelligent measurement chamber 1 is connected to the analyzer 2 via cables, pipes, etc.;

[0062] S2: Select a 1m×1m sample plot, use the equipment to make the saw blade 9 dig a suitable depth on the four sides of the sample plot;

[0063] In this embodiment, no wheels are provided, and the device is placed in one position to dig to a suitable depth, and then the device is returned to its position and moved to the next position to dig;

[0064] S3: Replace the squeezing roller 22, lay the plastic film on one of the grooves of the dug edge, with the middle of the plastic film on the groove, so that the squeezing roller 22 squeezes the plastic film into the groove alternately;

[0065] S4: All four edges execute S3 to achieve root elimination and isolation.

[0066] S5: operating the gas flux intelligent measurement chamber 1 and the analyzer 2 to monitor heterotrophic respiration.

[0067] The length of the plastic film in S3 is equal to the length of the groove, and the width is greater than twice the depth of the groove, so that there is just enough left after pressing down.

[0068] Gas flux intelligent measurement chamber 1 has built-in: CO2 sensor, H2O sensor and CH4 sensor.

[0069] CO2 sensor, also known as carbon dioxide sensor, is mainly used to detect the concentration of carbon dioxide in the air. The following is a detailed introduction to the models and principles of CO2 sensors:

[0070] There are many different types of CO2 sensors. Here are some common models and their features:

[0071] Aosong ACD10:

[0072] It is an infrared high-precision and large-range CO2 gas concentration detection module.

[0073] It is suitable for various occasions that need to detect carbon dioxide concentration, such as environmental monitoring.

[0074] MH-Z19D:

[0075] Infrared carbon dioxide gas sensor with high accuracy and stability.

[0076] SCD30:

[0077] Imported original air quality sensor, suitable for high-precision measurement.

[0078] It is often used in environmental monitoring stations, laboratories and other places where accurate measurement of carbon dioxide concentration is required.

[0079] NDIR infrared sensor:

[0080] Adopting the non-dispersive infrared (NDIR) principle, it has the characteristics of low power consumption and long life.

[0081] Suitable for carbon dioxide concentration monitoring in smart homes, fresh air systems and other occasions.

[0082] FS00306:

[0083] It is suitable for CO2 concentration detection in pipelines, tunnels, atmosphere monitoring, animal husbandry and other occasions.

[0084] With high precision and stability, it can meet the needs of different fields.

[0085] The working principle of CO2 sensor is mainly based on the following technologies:

[0086] Non-dispersive infrared (NDIR) principle:

[0087] This is one of the most common principles in CO2 sensors. It uses the absorption characteristics of carbon dioxide to infrared light of a specific wavelength to detect carbon dioxide concentration.

[0088] When infrared light passes through a gas containing carbon dioxide, the carbon dioxide molecules absorb infrared light of a specific wavelength, causing the light intensity to weaken. By measuring the change in light intensity, the concentration of carbon dioxide can be calculated.

[0089] NDIR sensors are usually composed of an infrared light source, an optical element, and a photodetector. The infrared light source emits infrared light of a specific wavelength, which passes through the optical element and irradiates the gas to be measured. After the carbon dioxide molecules in the gas to be measured absorb part of the infrared light, the remaining infrared light is received by the photodetector and converted into an electrical signal. By processing this electrical signal, the concentration value of carbon dioxide can be obtained.

[0090] Electrochemical principle:

[0091] Some CO2 sensors work on the principle of electrochemistry. This type of sensor is based on redox reactions. When carbon dioxide molecules pass through the sensor layer, they undergo redox reactions with the active substances on the sensor layer, generating current signals. By measuring the size of this current signal, the concentration of carbon dioxide can be calculated.

[0092] Optical scattering principle:

[0093] Some CO2 sensors also use the principle of optical scattering to detect CO2 concentration. When CO2 molecules pass through the sensor, they scatter the light emitted by the light source. By measuring the intensity or directional changes of the scattered light, the concentration of CO2 can be inferred. However, this principle is relatively rarely used in CO2 sensors.

[0094] Capacitor principle:

[0095] Capacitive CO2 sensors usually consist of two electrodes and a dielectric layer. When carbon dioxide molecules pass through the sensor, they react chemically with the active substances in the dielectric layer, causing a change in capacitance in the dielectric layer. By measuring the change in capacitance, the concentration of carbon dioxide can be calculated. However, CO2 sensors based on this principle are not common in the market.

[0096] H2O sensor, also known as moisture sensor or humidity sensor, is mainly used to detect moisture content or humidity. The following is a detailed introduction to H2O sensor models and principles:

[0097] There are many types of H2O sensors, and different brands and manufacturers offer their own unique models and specifications. Here are some common H2O sensor models and their features:

[0098] Leuze LSS 55.H2O series;

[0099] Photoelectric sensor, can be used for the identification of aqueous liquids.

[0100] With high precision and stability, it is suitable for a variety of application scenarios.

[0101] American H2O company high temperature absolute humidity sensor 303

[0102] Patented sensor technology for precise humidity measurement in high temperature and harsh conditions.

[0103] In-situ measurement, heated probe and special ceramic surface filter ensure that the sensor is suitable for high dust and high humidity environments.

[0104] Other makes and models;

[0105] Such as Omron MEMS differential pressure sensor, CYW series submersible level transmitter, NPA series millivolt pressure sensor, etc. Although these sensors may not be specifically used for humidity measurement, they can also be used as a means of detecting moisture or humidity in certain applications.

[0106] The working principle of H2O sensor is mainly based on the following technologies:

[0107] Capacitive principle:

[0108] Capacitive humidity sensors usually consist of two electrodes and a layer of dielectric material. When water molecules in the air are adsorbed on the dielectric material, the capacitance value of the dielectric material will change, so the humidity can be detected by measuring the change in capacitance value.

[0109] Resistive principle:

[0110] Resistive humidity sensors usually use a special humidity-sensitive material whose resistance value changes with humidity. By measuring the change in resistance value, the humidity can be calculated.

[0111] Principle of electrolysis:

[0112] The electrolytic humidity sensor generates hydrogen and oxygen by electrolyzing water, and estimates the humidity based on the amount of electricity consumed during the electrolysis process. This method is usually used for high-precision and wide-range humidity measurement.

[0113] Dew point method principle:

[0114] Dew point humidity sensors calculate humidity by measuring the dew point temperature in the air. The dew point temperature is the temperature at which the water vapor in the air reaches saturation. By measuring the dew point temperature and comparing it with the ambient temperature, the humidity can be calculated.

[0115] Optical scattering method:

[0116] Some H2O sensors also use the principle of optical scattering to detect moisture content. When light passes through a medium containing water molecules, the water molecules scatter the light, and the moisture content can be inferred by measuring the intensity or direction change of the scattered light.

[0117] CH4 sensor, also known as methane sensor, is mainly used to detect the concentration of methane gas in the air. The following is a detailed introduction to the models and principles of CH4 sensors:

[0118] There are many types of CH4 sensors. Here are some common models and their features:

[0119] MH-440D;

[0120] The detection is done using the non-dispersive infrared (NDIR) principle.

[0121] The measuring range is 5% vol (optional within 100% vol range).

[0122] The power supply is 35V DC, and the signal output is 0.42V DC and UART communication output.

[0123] It has good selectivity, no oxygen dependence, stable performance and long life.

[0124] Built-in temperature sensor for temperature compensation.

[0125] MH-742B;

[0126] The non-dispersive infrared (NDIR) principle is also used for detection.

[0127] High sensitivity, high resolution and long service life.

[0128] It is non-toxic and resistant to water vapor interference.

[0129] It is widely used in fire detection, explosive gas detection and other fields.

[0130] C-Series;

[0131] Such as C-50, C-100, C-200 and other models, the range ranges from 5%vol to 100%vol.

[0132] The accuracy is ±5% FS and the resolution varies from 0.001% vol to 0.1% vol.

[0133] It adopts the non-dispersive infrared (NDIR) detection principle and the product is small in size.

[0134] Built-in temperature compensation, output analog voltage signal and digital TTL signal.

[0135] The working principle of CH4 sensor is mainly based on the following technologies:

[0136] Non-dispersive infrared (NDIR) principle:

[0137] The non-dispersive infrared sensor uses the absorption characteristics of methane gas to infrared light of a specific wavelength to detect the methane concentration.

[0138] When infrared light passes through a gas containing methane, methane absorbs specific wavelengths of infrared light, causing the light intensity to weaken.

[0139] By measuring changes in light intensity, the concentration of methane can be calculated.

[0140] Catalytic combustion principle:

[0141] Some methane sensors work on the principle of catalytic combustion.

[0142] In the sensor, methane burns with oxygen in the air on a catalytic element, generating heat.

[0143] By measuring the change in heat or the change in resistance of the catalytic element, the concentration of methane can be calculated.

[0144] Thermal conductivity principle:

[0145] The thermal conductivity principle sensor uses the difference in thermal conductivity between methane and air to detect methane concentration.

[0146] When methane gas passes through the sensor, the temperature distribution inside the sensor will change due to the difference in thermal conductivity between methane and air.

[0147] By measuring the change in temperature distribution, the concentration of methane can be calculated.

[0148] It also includes the following embodiments: The gas flux intelligent measurement chamber 1 of the device has built-in CO2 sensors, H2O sensors and CH4 sensors to detect relevant soil data, etc. The synchronous monitoring of these parameters provides comprehensive and accurate data support for scientific researchers, which helps to deeply analyze the complex mechanism of soil respiration.

[0149] It also includes the following embodiments: the device adopts a dual-axis motor 15 and a screw rod 14 threadedly connected to the threaded barrel 5 to realize the overall downward movement of the actuator assembly; the contact point between the parallel rod 24 and the extrusion column 34 constitutes a movable fulcrum of the lever. When alternately extruding the plastic film or grooving, power × the distance from the fulcrum to the power action line = resistance × the distance from the fulcrum to the resistance action line, that is, power × power arm = resistance × resistance arm; the vertical plate 25 and the parallel rod 24 are installed to form a parallelogram mechanism. When the extrusion column 34 reciprocates, the two sides of the parallel rod 24 are alternately pressed down and gradually moved downward, which solves the problem of time-consuming and labor-intensive manual grooving and pressing of plastic film.

[0150] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A monitoring device for measuring heterotrophic respiration of forest soil, characterized in that: include: A gas flux intelligent measurement chamber (1), an analyzer (2) and a processing mechanism; The processing mechanism includes a frame component and an execution component; The frame assembly comprises a frame (4), the frame (4) is provided with symmetrical guide grooves (13), and the frame (4) is fixedly connected to the threaded cylinder (5); The actuator assembly comprises symmetrical lifting frames (12), the symmetrical lifting frames (12) are respectively fixedly connected to U plates (26), the U plates (26) are respectively fixedly connected to symmetrical guide cross bars (27), the symmetrical guide cross bars (27) respectively pass through slide plates (32), the slide plates (32) are fixedly connected to mounting vertical bars (33), and the mounting vertical bars (33) are fixedly connected to extrusion columns (34); The lifting frames (12) are symmetrically fixedly connected to the guide cylinders (6), the lifting frames (12) are symmetrically fixedly connected to the upper ends of the vertical springs (18), the vertical springs (18) are symmetrically fixedly connected to the transverse guide blocks (19), the transverse guide blocks (19) are symmetrically fixedly connected to the guide vertical rods (17), the vertical springs (18) are symmetrically sleeved on the corresponding guide vertical rods (17), and the guide vertical rods (17) are symmetrically arranged in the corresponding guide cylinders (6); The symmetrical transverse guide blocks (19) are respectively provided with guide cross bars (20); the symmetrical transverse guide blocks (19) are respectively fixedly connected to transverse springs (21); the symmetrical transverse springs (21) are respectively sleeved around the corresponding guide cross bars (20); the symmetrical transverse springs (21) and the symmetrical guide cross bars (20) are respectively fixedly connected to the mounting vertical plates (25); The symmetrical mounting vertical plates (25) are rotatably connected to the symmetrical parallel rods (24), and the extrusion columns (34) contact the upper parallel rods (24); The parallel rod (24) at the lower side is detachably fixedly connected to a first mounting bar (11), the first mounting bar (11) is fixedly connected to a saw blade cover (10), and a saw blade (9) is installed in the saw blade cover (10); The parallel rod (24) on the lower side is detachably fixedly connected to the first mounting plate (23), and the first mounting plate (23) is fixedly connected to the squeezing roller (22).

2. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 1, characterized in that: The U plate (28) is fixedly connected to the arc plate (16), the arc plate (16) is fixedly connected to the dual-axis motor (15), the upper output shaft of the dual-axis motor (15) is fixedly connected to the screw rod (14), the screw rod (14) is threadedly connected to the threaded barrel (5), the lower output shaft of the dual-axis motor (15) is fixedly connected to the crank (29), the crank (29) is fixedly connected to the power circular shaft (31), the power circular shaft (31) is arranged in the movable groove (30), and the movable groove (30) is fixedly connected to the slide plate (32).

3. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 2, characterized in that: Here’s how to use it: S1: installing the gas flux intelligent measurement chamber (1) and the analyzer (2); S2: Select a 1m×1m sample plot, use the equipment to make the saw blade (9) dig a suitable depth on the four sides of the sample plot; S3: replacing the squeezing roller (22), laying the plastic film on one of the grooves of the dug edge, with the middle of the plastic film on the groove, so that the squeezing roller (22) can squeeze the plastic film into the groove alternately; S4: All four edges execute S3 to achieve root elimination and isolation. S5: operating the gas flux intelligent measurement chamber (1) and the analyzer (2) to monitor heterotrophic respiration.

4. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 3, characterized in that: The length of the plastic film in S3 is equal to the length of the groove, and the width is greater than twice the depth of the groove, so that there is just enough left after pressing down.

5. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 3, characterized in that: The mounting vertical plate (25) and the parallel rod (24) form a parallelogram structure. When the extrusion column (34) reciprocates, the two sides of the parallel rod (24) are alternately pressed down while gradually moving downward, thereby solving the time-consuming and laborious problem of manually digging grooves and pressing in plastic films.

6. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 5, characterized in that: The contact point between the parallel rod (24) and the extrusion column (34) constitutes a movable fulcrum of the lever. When the plastic film is alternately extruded or slotted, power×the distance from the fulcrum to the line of action of the power=resistance×the distance from the fulcrum to the line of action of the resistance, that is, power×power arm=resistance×resistance arm.

7. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 6, characterized in that: The U plate (26) is provided with a notch corresponding to the mounting vertical rod (33).

8. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 7, characterized in that: The symmetrical lifting frames (12) are respectively fixedly connected to the guide blocks (28), and the symmetrical guide blocks (28) are respectively nested in the corresponding guide grooves (13).

9. The monitoring device for facilitating the measurement of heterotrophic respiration of forest soil according to claim 1, characterized in that: The frame (4) is fixedly connected to a symmetrical mounting plate (7), and the symmetrical mounting plates (7) are respectively bearing-connected to the axles of the double wheels (8).

10. The monitoring device for measuring heterotrophic respiration of forest soil according to claim 7, characterized in that: The frame (4) is fixedly connected to the handle (3).

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