Experimental device and experimental method for real-time temperature detection of multiple points of smoldering ember

Abstract

The application discloses a moxa cone smoldering multi-point real-time temperature detection experimental device and method, which comprises a temperature measurement experiment table, an annular base is arranged on the temperature measurement experiment table, a moxa cone combustion base is arranged at the center of the annular base, the moxa cone combustion base is used for fixing a moxa cone, a plurality of rotating sliding tables are arranged on the annular base, each rotating sliding table can move along the circumference of the annular base and move along the radial direction of the annular base, and a vertical single-group temperature measurement module and a vertical needle row temperature measurement module are arranged on the top of each rotating sliding table; the vertical single-group temperature measurement module comprises a single-path temperature detection assembly, and the single-path temperature detection assembly can move up and down in the vertical direction; and the vertical needle row temperature measurement module comprises a multi-path temperature measurement module assembly, and the multi-path temperature measurement module assembly can move up and down in the vertical direction.

Description

Technical Field

[0001] This invention relates to the field of temperature detection technology, and in particular to a device and experimental method for detecting the overall multi-point temperature during the smoldering of moxa cones. Background Technology

[0002] Currently, there is a lack of dedicated experimental equipment for testing the temperature field during the smoldering process of moxa cones. There are two main methods for determining the temperature of smoldering moxa cones: First, contact measurement, which involves using temperature sensors to contact the burning material of the moxa cone for temperature detection. Second, non-contact temperature measurement, which uses infrared thermal imaging and other methods to test the temperature field of the burning cone. The first method measures the internal gas phase temperature during the smoldering process of the moxa cone, requiring multiple small temperature sensors. Even slight fluctuations in the experiment, whether caused by human intervention or environmental factors, can cause fluctuations in the sensor positions, leading to measurement deviations. The second method measures the surface temperature of the burning cone based on the infrared energy radiated by the material itself, but it is difficult to monitor the specific temperatures at multiple points within the combustion process in real time. Summary of the Invention

[0003] This invention focuses on the research of contact temperature measurement experimental device for moxa cones, and proposes an experimental device and method that can realize multi-point, real-time temperature detection, providing detailed data for equivalent simulation and quantitative equivalent analysis of the entire smoldering process.

[0004] The technical solution adopted in this invention is as follows:

[0005] An experimental device for real-time temperature detection of smoldering moxa cones at multiple points includes a temperature measuring platform. An annular base is positioned on the platform, and a moxa cone combustion base is located at the center of the platform to hold the moxa cone. Multiple rotating slides are mounted on the annular base, each capable of moving circumferentially along the platform. A temperature measuring device is positioned on the top of each slide. The measuring device can move radially along the slides, and one or more independently configured single-channel temperature detection components are mounted on it. Each single-channel temperature detection component can move vertically, and a temperature sensor or steel needle can be inserted into the head of each component. The steel needle is pre-inserted into a hole in the moxa cone, and the temperature sensor is inserted into that hole. The insertion depth of the temperature sensor or steel needle into the moxa cone is adjustable.

[0006] As a further technical solution, the moxa cone combustion base includes a three-jaw chuck and a combustion base. The three-jaw chuck is used to fix the moxa cone when drilling holes, and the combustion base is used to fix the moxa cone when measuring temperature.

[0007] As a further technical solution, a thermal imager is also included. The thermal imager is set on the outside of the temperature measurement experimental platform and mainly measures the dynamic temperature change of the surface of the moxa cone for comparison of experimental results.

[0008] As a further technical solution, a ring tooth and a slide table are provided on the circumferential direction of the top surface of the annular base. A gear and a slide groove are provided at the bottom of the rotating slide table. The gear is connected to a rotation adjustment knob provided on the outer ring of the annular base, and the gear meshes with the ring tooth. The slide groove cooperates with the slide table, and a locking knob is also provided on the inner side of the bottom of the rotating slide table. The locking knob fixes the position of the rotating slide table from the radial direction of the annular base.

[0009] As a further technical solution, a rack and a slide are provided on the top surface of the rotating slide. Both the rack and the slide are arranged along the radial direction of the annular base. A gear and a groove are provided at the bottom of the vertical single-group temperature measuring module and the vertical needle array temperature measuring module. The gear meshes with the rack and the groove cooperates with the slide.

[0010] As a further technical solution, the temperature measuring device comprises a rack, a housing, a radially moving handwheel, and a single-channel temperature detection component. A rack and a slide groove are vertically arranged inside the housing. The single-channel temperature detection component moves vertically along the slide groove by cooperating with the slide groove on both sides of a vertical slider. A gear is arranged on the side of the single-channel temperature detection component, connected to the vertical adjusting handwheel, and meshing with the rack to achieve vertical movement of the single-channel temperature detection component.

[0011] As a further technical solution, the single-channel temperature detection component includes a temperature sensor or steel needle, a connector, a linear motion motor, a vertical slider, and a vertical adjustment handwheel; wherein the temperature sensor or steel needle is inserted into the connector, the connector is fixed to the linear motion motor by welding, the rear end of the housing of the linear motion motor is connected to the vertical motion slide, and a gear shaft mounting hole is provided on the vertical slide for mounting gear three.

[0012] As a further technical solution, the temperature measuring device is also equipped with a locking mechanism to lock its position on the rotating slide.

[0013] As a further technical solution, scale values ​​are also provided on the sides of the annular base and the rotating slide; sheet-shaped temperature sensors are provided on the top and bottom of the moxa cone to detect the temperature of the top and bottom of the moxa cone.

[0014] Secondly, based on the aforementioned experimental device for real-time temperature detection at multiple points during the smoldering of moxa cones, the specific detection method is as follows:

[0015] Step 1: Move the temperature measuring device to the outermost end of the rotating slide, and install a steel needle at the front end of each single-channel temperature detection component. Move the rotating slide to a suitable angle according to the measurement arrangement and lock the rotating slide. The position of the steel needle overlaps with the position of the thermocouple probe inserted into the moxa cone on the moxa cone. The inner diameter of the steel needle is larger than the outer diameter of the thermocouple probe.

[0016] Step 2: Move the temperature measuring device to the inside of the rotating slide until the tip of the steel needle touches and is fixed to the moxa cone; then, according to the required depth for temperature measurement at each point, control each steel needle to drill a hole into the moxa cone.

[0017] After drilling in step 3, move the temperature measuring device to the outermost end of the rotating slide again and remove the steel needle.

[0018] Step 4: Insert the moxa cone into the combustion base according to the drilling angle. Install a temperature sensor at the front end of each single-channel temperature detection component. Fine-tune the angle of the rotating slide to allow the temperature sensor to smoothly enter the hole on the moxa cone. Then fix the rotating slide. Move the temperature measuring device to the inside of the rotating slide. Stop when the front end of the temperature sensor reaches the drilling depth. Finally, ignite the moxa cone and read the temperature at each point of the burning moxa cone through the temperature acquisition card connected to the temperature sensor.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention enables the temperature measuring device to move circumferentially around the moxa cone by setting up an annular base, a rotating slide, and a driving device, thereby achieving temperature detection at any point on the circumference of the moxa cone. Simultaneously, the temperature measuring device can also move radially via the rotating slide and driving device, enabling temperature detection of moxa cones of different diameters. Furthermore, one or more single-channel temperature detection components can be set as needed, and these components can also move vertically, thus enabling temperature detection at any position on the moxa cone. The temperature measuring device can also fix a perforated steel needle, achieving both pre-measurement drilling and temperature measurement. In short, this device ensures that the distribution design of the temperature sensors guarantees real-time acquisition of key temperature values ​​during smoldering, providing accurate temperature values ​​for modeling, simulation, and quantitative equivalent analysis.

[0021] 2. The entire control of this invention adopts a knob + gear and rack system. By rationally arranging the positions of the gears, racks, and knobs, the size of the entire device is reduced while ensuring a certain level of stability and accuracy (its accuracy can reach 0.01mm). This allows the entire device to be used to detect the temperature of tiny components such as moxa cones. Currently, similar devices are relatively large and cannot be used for temperature detection of tiny components such as moxa cones.

[0022] 3. The single-channel temperature detection component in the temperature measuring device adopts a modular design, which can increase the number of single-channel temperature detection components as needed. The pre-drilled design reduces damage to the temperature sensor during the experiment, reduces the natural convection of air around the moxa cone during the smoldering process, and extends the service life of the temperature sensor; at the same time, the drilling depth is controllable.

[0023] 4. In this invention, the top and bottom temperatures of the moxa cone are measured by a sheet sensor. The sheet sensor is used in combination with this invention to achieve temperature detection of the moxa cone. It also includes a thermal imager, which is set on the outside of the temperature measurement experimental platform. The thermal imager mainly measures the dynamic temperature change of the radiating surface of the moxa cone and is used to compare the experimental results with the data detected by the temperature sensor. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0025] Figure 1 This is an overall layout diagram of the temperature measuring device proposed in this invention;

[0026] Figure 2 This is an assembly diagram of the temperature measuring device proposed in this invention;

[0027] Figure 3 This is a schematic diagram of the vertical single-group temperature measurement module of the present invention;

[0028] Figure 4 This is a schematic diagram of the single-channel temperature detection component of the present invention;

[0029] Figure 5 This is a schematic diagram of the vertical needle array temperature measurement module of the present invention;

[0030] Figure 6 This is a schematic diagram of a rotary slide.

[0031] Figures 7(a) and 7(b) are schematic diagrams of the temperature measurement module, measuring points, and sensor distribution;

[0032] Figure 8 This is a schematic diagram of the temperature acquisition process;

[0033] In the diagram: 1. Tripod; 2. Infrared thermal imager; 3. Temperature measurement experimental platform; 4. Computer; 5. Experimental platform frame; 3-1. Moxa cone combustion base; 3-2. Moxa cone; 3-3. Vertical single-group temperature measurement module; 3-4. Single-channel temperature detection component; 3-5. Vertical needle array temperature measurement module; 3-6. Circular base; 3-7. Rotary slide.

[0034] 3-3-1 rack, 3-3-2 housing, 3-3-3 radial movement handwheel, 3-3-4 locking screw;

[0035] 3-4-1 Drilled steel needle / sensor, 3-4-2 Connecting port, 3-4-3 Miniature through linear screw stepper motor, 3-4-4 Connecting piece, 3-4-5 Vertical slider, 3-4-6 Vertical adjustment handwheel, 3-4-7 Gear;

[0036] 3-5-1 Radial locking mechanism;

[0037] 3-7-1 Rotary adjustment knob, 3-7-2 Dovetail platform, 3-7-3 Main slide body, 3-7-4 Locking knob, 3-7-5 Gear. Detailed Implementation

[0038] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this invention proposes an experimental device for real-time temperature detection of smoldering moxa cones at multiple points.

[0043] In a typical embodiment of the present invention, such as Figure 1 As shown, this experimental platform is used for real-time temperature detection during the burning of moxa cones. The measuring device can consist of a vertical single-group temperature measuring module and / or a vertical needle array temperature measuring module, enabling the measurement of the vertical and horizontal multi-point combustion temperature of the moxa cones. Specifically, the main function of the vertical needle array temperature measuring module is to detect the temperature of the moxa cones at different heights, while the main function of the vertical single-group temperature measuring module is to detect the temperature of a single point on the moxa cone. By combining the vertical needle array temperature measuring module and the vertical single-group temperature measuring module, the temperature of any point on the moxa cone can be detected. Of course, if only single-point temperature detection of the moxa cone is required, multiple vertical single-group temperature measuring modules can be set up. If multiple groups of temperatures in multiple directions are to be detected simultaneously, multiple needle array temperature measuring modules can be set up simultaneously.

[0044] Furthermore, the temperature measuring module is connected to a rotating slide via a rack and pinion mechanism, allowing it to move radially along the rack. The annular base has a rack, and the rotating slide can rotate around the moxa cone along the rack. The overall layout is as follows: Figure 1 As shown, it consists of a tripod 1, an infrared thermal imager 2, a temperature measuring experimental platform 3, a computer 4, an experimental platform frame 5, a data acquisition card, an Ethernet cable, and connecting wires. The data acquisition card, Ethernet cable, and connecting wires are located between the computer and the temperature sensor and are not shown or labeled in the figure. The infrared thermal imager 2 is mounted on the tripod 1 and mainly measures the dynamic temperature change of the radiating surface of the moxa cone, which is used to compare with the results detected by the temperature measuring experimental platform 3. The temperature measuring experimental platform 3 mainly measures the temperature change inside the moxa cone. This invention combines two measurement methods and compares experimental data to more accurately test the dynamic changes of the entire smoldering process of the moxa cone.

[0045] like Figure 2As shown, the temperature measuring experimental platform 3 in this embodiment mainly consists of a detachable moxa cone combustion base 3-1, a moxa cone 3-2, a vertical single-group temperature measuring module 3-3, a single-channel temperature detection component 3-4, a vertical needle array temperature measuring module 3-5, an annular base 3-6, and a rotating slide 3-7. The detachable moxa cone combustion base 3-1 is installed at the center of the annular base 3-6. The rotating slide 3-7 is set on the annular base 3-6, and the vertical single-group temperature measuring module 3-3 and / or the vertical needle array temperature measuring module 3-5 are set on the rotating slide 3-7. Each vertical single-group temperature measuring module 3-3 and the vertical needle array temperature measuring module 3-5 is equipped with a single-channel temperature detection component 3-4. This invention realizes the movement of the vertical single-group temperature measuring module 3-3 and / or the vertical needle array temperature measuring module 3-5 around the moxa cone in the circumferential direction by setting the annular base, the rotating slide, and the driving device, thereby realizing the movement of the moxa cone. Temperature detection at any point along the circumference of the moxa cone; simultaneously, the vertical single-group temperature measurement module 3-3 and / or the vertical needle array temperature measurement module 3-5 can also move radially via a rotating slide and drive device to achieve temperature detection of moxa cones of different diameters; moreover, one or more single-channel vertical single-group temperature measurement modules 3-3 and / or vertical needle array temperature measurement modules 3-5 can be set as needed, and the single-channel temperature detection component can also move vertically, thus enabling temperature detection at any position of the moxa cone. Furthermore, the vertical single-group temperature measurement module 3-3 and / or vertical needle array temperature measurement module 3-5 can also fix perforated steel needles, achieving both pre-measurement perforation and temperature measurement; in short, this device ensures that the distribution design of the temperature sensors guarantees real-time acquisition of key temperature values ​​during smoldering, providing accurate temperature values ​​for modeling, simulation, and quantitative equivalent analysis.

[0046] Specifically, the top of the annular base 3-6 is provided with ring teeth. By setting the ring teeth on the top surface of the annular base 3-6, the size of the entire device can be reduced in the diameter direction, and the stability of the entire rotary slide can be ensured. Furthermore, to precisely control the position of the slide, scale values ​​are also provided on the circumference of the outer surface of the annular base 3-6. Further, to ensure the stability of the movement, the annular base 3-6 of this application is also provided with a dovetail platform. The dovetail platform cooperates with the dovetail groove at the bottom of the rotary slide 3-7 to achieve guiding and limiting functions.

[0047] Furthermore, in this embodiment, three rotary slides 3-7 are schematically provided. The specific number of slides installed can be set according to the needs. In this embodiment, a vertical needle array temperature measuring module 3-5 is installed on one of the rotary slides 3-7; vertical single-group temperature measuring modules 3-3 are installed on the other two rotary slides 3-7; or, furthermore, vertical needle array temperature measuring modules 3-5 are installed on all three rotary slides 3-7. The specific installation can be set according to the needs.

[0048] Furthermore, the dovetail groove below each rotating slide 3-7 is connected to the dovetail platform of the annular base 3-6, and multiple rotating slides 3-7 can be distributed around the moxa cone along the dovetail platform.

[0049] Specifically, such as Figure 6 As shown, the rotary slide 3-7 consists of a rotary adjustment knob 3-7-1, a dovetail platform 3-7-2, a slide body 3-7-3, a locking knob 3-7-4, and a gear 3-7-5. The dovetail platform 3-7-2 and gear 3-7-5 are located at the bottom of the slide body 3-7-3. The locking knob 3-7-4 is located on the inner side of the dovetail platform 3-7-2, and the rotary adjustment knob 3-7-1 is located on the outer side. The locking knob 3-7-4 and the rotary adjustment knob 3-7-1 are positioned opposite each other. The locking knob 3-7-4 fixes the position of the rotary slide 3-7 in the radial direction, and the rotary adjustment knob 3-7-1 is also positioned in the radial direction, thus fixing the rotary slide 3-7 in the circumferential direction. The rotary adjustment knob 3-7-1 is connected to the gear 3-7-5, which meshes with the annular rack on the base. Rotating the adjustment knob 3-7-1 drives the gear 3-7-4 to move along the annular rack on the base, thus driving the rotary slide to rotate to the designated position. Furthermore, the dovetail platform 3-7-2 is fixedly connected to the slide body 3-7-3 by four screws. The locking knob 3-7-4 is used to fix the rotary slide 3-7 radially along the annular base 3-6, avoiding the influence of minor vibrations during drilling and feeding on the overall measurement accuracy. In use, the dovetail groove at the bottom of the rotary slide engages with the dovetail platform on the base, the gear meshes with the annular rack on the base, and rotating the handwheel drives the gear to mesh with the rack, thus driving the rotary slide to rotate.

[0050] Furthermore, along the radial direction of the annular base 3-6, a rack is also provided on the top of the rotary slide 3-7. This rack engages with the gears at the bottom of the vertical single-group temperature measuring module 3-3 and the vertical needle row temperature measuring module 3-5 to realize the movement of the vertical single-group temperature measuring module 3-3 and the vertical needle row temperature measuring module 3-5 in the radial direction. Furthermore, in order to enable the vertical single-group temperature measuring module 3-3 and the vertical needle row temperature measuring module 3-5 to move smoothly and steadily in the radial direction, the top surface of the rotary slide 3-7 is designed with a structure that is higher on the outside and lower on the inside.

[0051] Furthermore, the vertical single-group temperature measuring module 3-3 and the vertical needle array temperature measuring module 3-5 are connected to the dovetail platform on their respective rotating slides 3-7 via the dovetail groove below, and move radially along the dovetail platform. The moxa cone combustion base 3-1 and the perforated three-jaw chuck are fixed to the annular base through three through holes, screws, and nuts.

[0052] The three-jaw chuck is mounted on a circular base. The moxa cone is placed into the groove in the center of the jaws and secured with the jaws to prevent movement during drilling. To prevent the three-jaw chuck from affecting the combustion of the moxa cone, the three-jaw chuck is removed when measuring the combustion temperature, and only the combustion base 3-1 is used. The cylindrical shape makes it easier to keep the moxa cone perpendicular to the ground, ensuring the burning surface is always parallel to its cross-section. This ensures uniform combustion along the axial direction and avoids measurement errors caused by a tilted burning surface. To maintain experimental results similar to clinical practice, the upper part of the replaceable base provides a constant temperature heating function, keeping the bottom temperature of the moxa cone at the same temperature as human skin, i.e., 36.5℃.

[0053] Furthermore, such as Figure 3 As shown, the vertical single-group temperature measuring module 3-3 in this embodiment consists of a rack 3-3-1, a housing 3-3-2, a radial moving handwheel 3-3-3, a locking screw 3-3-4, a vertical slider 3-4-5, and a single-channel temperature detection component 3-4. A rack 3-3-1 and a sliding groove are vertically arranged inside the housing 3-3-2 of the temperature measuring component. The single-channel temperature detection component 3-4 cooperates with the sliding groove of the housing 3-3-2 via the two sides of the vertical slider 3-4-5, allowing it to move vertically along the sliding groove. A gear 3-4-7 is arranged on the side of the single-channel temperature detection component 3-4, which is connected to the vertical adjusting handwheel 3-4-6 and meshes with the vertically arranged rack 3-3-1 of the temperature measuring component, thus enabling the single-channel temperature detection component 3-4 to move vertically.

[0054] Furthermore, a gear is installed at the bottom of the housing 3-3-2, and the gear is connected to the radial movement handwheel 3-3-3. A rack is installed at the top of the rotary slide 3-7, and the rack meshes with the gear at the bottom of the housing 3-3-2. The vertical single-unit temperature measuring module 3-3 can be moved radially by the radial movement handwheel 3-3-3. When the single-unit temperature measuring module 3-3 moves to the designated position, its position in the vertical direction can be fixed by the locking screw 3-3-4. Specifically, the locking screw 3-3-4 is located on the housing 3-3-2, passes through the housing 3-3-2, and is inserted into the vertical slider 3-4-5 to fix the single-unit temperature measuring module 3-3.

[0055] Furthermore, the structure of the vertical needle array temperature measurement module 3-5 is basically the same as that of the vertical single-group temperature measurement module 3-3 mentioned above, and will not be described in detail here. The difference is that the vertical needle array temperature measurement module 3-5 has multiple temperature detection components 3-4.

[0056] All the racks are made with nickel-plated copper, making them corrosion-resistant, oxidation-resistant, and more durable. The adjusting screws adjust the slider position, using vernier calipers for accurate readings down to 0.01mm. A vertical scale ensures a constant distance between the smoldering temperature detection units, preventing temperature measurement accuracy from being affected by distance differences.

[0057] Furthermore, the single-channel temperature detection components 3-4 are as follows: Figure 4 As shown, the device consists of a perforated steel needle / sensor 3-4-1, a connecting port 3-4-2, a miniature through-type linear screw stepper motor 3-4-3, a connecting piece 3-4-4, a vertical slider 3-4-5, and a vertical adjustment handwheel 3-4-6. The perforated steel needle / sensor is inserted into the connecting port 3-4-2 and fixed to the miniature through-type linear screw stepper motor 3-4-3 by welding. The housing of the miniature through-type linear screw stepper motor 3-4-3 is fixed to the vertical sliding table 3-4-5 via the connecting piece 3-4-4. A gear shaft mounting hole is provided on the vertical sliding table 3-4-5 for mounting a gear. The up-and-down movement of the single-channel temperature detection component 3-4 is achieved through the meshing of the gear and rack. The miniature through-type linear screw stepper motor 3-4-3 drives the perforated steel needle / sensor 3-4-1 to move back and forth. The motor accuracy is controlled by controlling the step angle, thereby controlling its insertion depth. The connecting port 3-4-2 has a groove to facilitate the embedding and fixing of the sensor.

[0058] To minimize gaps caused by sensor insertion, micro thermocouples with an outer diameter no greater than 0.5 mm and a temperature measurement range no less than 1000℃ are used. Multiple thermocouples can be fixed using a fixed vertical adjustment handwheel, and the distance between them can be adjusted according to the user's needs. The ends of the thermocouples are then connected via compensating wires. The connection between the two can be a plug-in connector or a permanent connector. The connected compensating wires are then connected to the input terminal of the temperature acquisition card for data acquisition.

[0059] In operation, the miniature through-type linear screw stepper motor in the single-channel temperature detection component feeds the drilling needle and thermocouple, while the gear and rack engagement enables the vertical movement of the single-channel temperature detection component. When in use, turning the handwheel engages the gear and rack, moving the single-channel temperature detection component up and down along the slide. Once the designated height is reached, the miniature through-type linear screw stepper motor controls the radial movement of the drilling needle / thermocouple along the moxa cone, thus completing the drilling / temperature measurement.

[0060] The vertical needle array temperature measuring device 3-5 adds multiple temperature measuring components to the existing vertical single-group temperature measuring component. Each single-channel temperature detection component can move independently up and down in the vertical direction, and can simultaneously measure up to 5 temperature values ​​of the moxa cone in the vertical direction. The radial locking mechanism 3-5-1 for the temperature measuring components is described in detail below. Figure 6Furthermore, the perforated steel needles / sensors can be designed in different lengths, and by designing them in different lengths, the same vertical needle array temperature measuring device 3-5 can achieve temperature detection at different positions.

[0061] When in use, rotating the vertical adjustment handwheel 3-4-6 drives the gear to rotate. The meshing of the gear and rack drives the vertical moving slide to move vertically, thus allowing the single-channel temperature detection component to move vertically as a whole. During movement, the vertical height of the slider can be accurately positioned according to the vertical scale and scale block.

[0062] The process of drilling holes in the moxa cone before temperature measurement: Use the radial movement handwheel to move the vertical needle array temperature measurement module 3-5 and the vertical single-group temperature measurement module 3-3 to the outermost end, and install the drilling steel needle 3-4-1 on the front end of the single-channel temperature detection component 3-4. Then, rotate the rotary adjustment knob 3-7-1 to move the vertical needle array temperature measurement module 3-5 and the vertical single-group temperature measurement module 3-3 to the appropriate angle according to the measurement arrangement. Rotate the locking knob 3-7-4 to lock the slide. The position of the hollow steel needle required for drilling overlaps with the position of the thermocouple probe inserted into the moxa cone, and the inner diameter of the hollow steel needle is larger than the outer diameter of the thermocouple probe.

[0063] When drilling with a single feed, the moxa cone is quite compact, making overall feeding difficult and easily damaging its structure. It's also impossible to precisely control the drilling depth of each steel needle, potentially leading to insufficient, inconsistent, or large deviations in drilling depth. This invention uses a miniature through-type linear lead screw stepper motor to drive the steel needles for drilling. Each miniature through-type linear lead screw stepper motor drives one drilling steel needle, making drilling easy, depth controllable, with stable and high precision, without damaging the overall structure of the moxa cone.

[0064] Temperature measurement process;

[0065] Rotate the radial movement handwheel to move the vertical needle array temperature sensor module 3-5 and the vertical single-group temperature sensor module 3-3 inwards until the tip of the steel needle touches the moxa cone. Then, rotate the locking knob 3-5-1 to lock it in place. Based on the required depth for temperature measurement at each point, control the miniature through-type linear lead screw stepper motor to drill inwards. After drilling, rotate the locking knob 3-5-1 to unlock the device. Use the radial movement handwheel to move the vertical needle array temperature sensor module 3-5 and the vertical single-group temperature sensor module 3-3 to the outermost position and remove the drilled steel needle. Replace the steel needle with a thermocouple for subsequent smoldering temperature detection.

[0066] Temperature measurement point distribution. Because the moxa cone is a symmetrical small cone with a higher center temperature, the temperature measurement probe distribution is designed as shown in Figures 7(a) and 7(b) in order to measure the center temperature, surface temperature, and to obtain as much detail as possible about the cross-sectional temperature:

[0067] This distribution method reduces the number of probes, lowering the possibility of large errors in measurement results due to damage to the moxa cone structure; at the same time, it can obtain a more comprehensive temperature distribution across the combustion cross section, thereby obtaining the wavelength distribution range of the radiation spectrum. A schematic diagram of the horizontal cross-sectional temperature measurement is shown in Figure 7(a), and an axial cross-sectional view is shown in Figure 7(b).

[0068] Figure 7(a) shows a horizontal surface profile of the moxa cone. The five small rectangles in the figure represent the insertion positions of the five vertical needle array temperature measurement modules on the moxa cone. The three hollow dots ○ on the outer ring represent the three chip thermocouple sensors set at the bottom of the moxa cone. Referring to Figure 7(b), chip thermocouple sensors are also set at the top of the moxa cone. By setting chip thermocouple sensors at the top and bottom of the moxa cone, the temperature at the top and bottom of the moxa cone can be detected.

[0069] Furthermore, each vertical needle array temperature measurement module includes multiple temperature sensors, as shown in Figure 7(b). The solid dot ● indicates the depth of the perforated steel needles or thermocouple probes of the five vertical needle array temperature measurement modules. Four single-channel temperature detection components 3-4 are inserted into the center of the moxa cone to detect the temperature on the central axis of the moxa cone. Eight single-channel temperature detection components 3-4 are inserted into the 1 / 2 radius position to detect the temperature at that position. Eight single-channel temperature detection components 3-4 are inserted into the side of the moxa cone to detect its side temperature.

[0070] The temperature measurement procedure is as follows:

[0071] First, insert the moxa cone 3-2 into the combustion base 3-1 according to the drilling angle. Install thermocouples 3-4-1 at the front end of each single-channel temperature sensing component 3-4. Use the rotating adjustment knob 3-7-1 to fine-tune the angle of the rotating slide 3-7, ensuring the thermocouples 3-4-1 smoothly enter the holes on the moxa cone. Use the locking knob 3-5-1 to secure the slide. Next, rotate the radial movement handwheel 3-3-3 to move the vertical needle array temperature sensing module 3-5 and the vertical single-group temperature sensing module 3-3 inwards along the dovetail platform 3-7-2, stopping when the thermocouple front ends reach the drilling depth. Finally, ignite the moxa cone and read the temperature at various points during combustion using a temperature acquisition card connected to the thermocouples.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An experimental device for real-time temperature detection at multiple points during the smoldering of moxa cones, characterized in that, Including temperature measurement test bench, An annular base is provided on the temperature measuring experimental platform. A moxa cone burning base is located at the center of the annular base, used to fix the moxa cone. Multiple rotating slides are provided on the annular base, each capable of moving circumferentially along the base. A temperature measuring device is located on the top of each rotating slide. The temperature measuring device can move radially along the rotating slide, and one or more independently configured single-channel temperature detection components are mounted on it. Each single-channel temperature detection component can move up and down, and a steel needle and a temperature sensor are sequentially inserted into the head of each component. The steel needle is used to pre-insert a hole in the moxa cone before temperature measurement, and the temperature sensor is used to replace the steel needle and insert into the hole after insertion. The insertion depth of the temperature sensor or steel needle into the moxa cone is adjustable.

2. The experimental device for real-time temperature detection of smoldering moxa cones at multiple points as described in claim 1, characterized in that, The moxa cone combustion base includes a three-jaw chuck and a combustion base. The three-jaw chuck is used to fix the moxa cone when drilling holes and inserting the sensor; the combustion base is used to fix the moxa cone when measuring temperature.

3. The experimental device for real-time temperature detection of smoldering moxa cones at multiple points as described in claim 1, characterized in that, It also includes a thermal imager, which is set on the outside of the temperature measurement experimental platform and mainly measures the dynamic temperature change of the surface of the moxa cone for comparison of experimental results.

4. The experimental device for real-time temperature detection of smoldering moxa cones at multiple points as described in claim 1, characterized in that, A ring tooth and a slide are provided on the top surface of the annular base in the circumferential direction. A gear and a slide groove are provided at the bottom of the rotating slide. The gear is connected to a rotation adjustment knob on the outer ring of the annular base and meshes with the ring tooth. The slide groove cooperates with the slide. A locking knob is also provided on the inner side of the bottom of the rotating slide. The locking knob fixes the position of the rotating slide from the radial direction of the annular base.

5. The experimental device for real-time temperature detection of smoldering moxa cones at multiple points as described in claim 1, characterized in that, A rack and a slide are provided on the top surface of the rotating slide. Both the rack and the slide are arranged along the radial direction of the annular base. A gear and a groove are provided at the bottom of the vertical single-group temperature measuring module and the vertical needle array temperature measuring module. The gear meshes with the rack and the groove engages with the slide.

6. The experimental device for real-time temperature detection of smoldering moxa cones at multiple points as described in claim 1, characterized in that, The temperature measuring device consists of a rack, a housing, a radially moving handwheel, and a single-channel temperature detection component. A rack and a slide groove are vertically arranged inside the housing. The single-channel temperature detection component moves vertically along the slide groove via the interaction of the two sides of a vertical slider. A gear is located on the side of the single-channel temperature detection component, connected to the vertical adjusting handwheel, and meshes with the rack to enable vertical movement of the single-channel temperature detection component.

7. Such rights want The experimental device for real-time temperature detection of smoldering moxa cones at multiple points, as described in claim 6, is characterized in that... The single-channel temperature detection component includes a temperature sensor or steel needle, a connector, a linear motion motor, a vertical slider, and a vertical adjustment handwheel; wherein the temperature sensor or steel needle is inserted into the connector, the connector is fixed to the linear motion motor by welding, the rear end of the housing of the linear motion motor is connected to the vertical motion slide, and a gear shaft mounting hole is provided on the vertical slide for mounting gear three.

8. The experimental device for real-time temperature detection of smoldering moxa cones at multiple points as described in claim 1, characterized in that, The temperature measuring device is also equipped with a locking mechanism to lock its position on the rotating slide.

9. The experimental device for real-time temperature detection of smoldering moxa cones at multiple points as described in claim 1, characterized in that, The sides of the annular base and the rotating slide are also provided with scale values; A sheet-like temperature sensor is installed at the top and bottom of the moxa cone to detect the temperature at the top and bottom of the moxa cone.

10. The experimental method of the multi-point real-time temperature detection experimental device for smoldering moxa cones as described in any one of claims 1-9, characterized in that, as follows: Step 1: Move the temperature measuring device to the outermost end of the rotating slide, and install a steel needle at the front end of each single-channel temperature detection component. Move the rotating slide to a suitable angle according to the measurement arrangement and lock the rotating slide. The position of the steel needle overlaps with the position of the thermocouple probe inserted into the moxa cone on the moxa cone. The inner diameter of the steel needle is larger than the outer diameter of the thermocouple probe. Step 2: Move the temperature measuring device to the inside of the rotating slide until the tip of the steel needle touches and is fixed to the moxa cone; then, according to the required depth for temperature measurement at each point, control each steel needle to drill a hole into the moxa cone. After drilling in step 3, move the temperature measuring device to the outermost end of the rotating slide again and remove the steel needle. Step 4: Insert the moxa cone into the combustion base according to the drilling angle. Install a temperature sensor at the front end of each single-channel temperature detection component. Fine-tune the angle of the rotating slide to allow the temperature sensor to smoothly enter the hole on the moxa cone. At this point, fix the rotating slide. Move the temperature measuring device to the inside of the rotating slide. Stop when the front end of the temperature sensor reaches the drilling depth. Finally, ignite the moxa cone and read the temperature at each point of the burning moxa cone through the temperature acquisition card connected to the temperature sensor.

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