Testing device and method for monitoring tensile process of low-temperature root system in real time
By designing a test device including a low-temperature constant temperature box, tensile testing machine and workstation, the problem of ineffective control of the low-temperature root tensile test temperature and lack of real-time monitoring in the prior art is solved, and the tensile process of low-temperature root tensile is realized. Fast and real-time monitoring improves trial success rate and provides detailed data and image support.
Patent Information
- Application Number
- CN202411688399.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-02-21
AI Technical Summary
The existing low-temperature root tensile testing devices and methods cannot effectively and quickly control the root tensile testing process, and lack real-time monitoring functions, which limits the study of deformation of the root tensile drawing process.
A test device including a low-temperature constant temperature box, a tensile tester and a workstation was designed to provide a low-temperature constant temperature environment through the constant temperature chamber, and combine the tensile data acquisition unit and the imaging unit to realize real-time monitoring of the tensile process of the low-temperature root system.
It realizes rapid temperature control and real-time monitoring of the tensile process of low-temperature roots, saves test time, improves the test success rate, and provides detailed data and image support for deformation and fracture of the root pulling process.
Smart Images
Figure CN119492637A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of root tensile strength testing, and in particular to a testing device and method for real-time monitoring of a low-temperature root tensile strength process. Background Art
[0002] Slope ecological protection technology can reduce the damage to the ecological environment caused by engineering construction to a great extent, and can also achieve good ecological benefits. Under the action of external forces, the friction between the soil and the roots will cause the roots to stretch and deform. Therefore, the size of the tensile resistance of the roots of different vegetation is an important indicator for evaluating the slope protection ability of the vegetation roots.
[0003] At present, there is a lack of data and instruments for the tensile strength of vegetation roots under the influence of low temperatures at home and abroad. In cold and arid areas, negative temperatures are an inevitable process for vegetation root-soil complexes. Most of the current test systems for measuring root tensile strength are carried out at room temperature. The existing low-temperature root tensile test devices and methods require a large space for temperature control, and cannot effectively and quickly control the temperature of the root tensile test process, which increases the time of the low-temperature root pull-out test and restricts the test rate. In addition, the existing equipment does not have the function of real-time monitoring of the test process, which limits the research on the deformation of the root pull-out process.
[0004] Therefore, it is necessary to design a testing device and method that is highly practical and can record tension and images in real time to monitor the low-temperature root tensile process in real time. Summary of the invention
[0005] The object of the present invention is to provide a testing device and method for real-time monitoring of the low-temperature root tensile process, so as to solve the problems raised in the above-mentioned background technology.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a testing device and method for real-time monitoring of the tensile process of low-temperature roots, comprising a low-temperature constant temperature box, a tensile testing machine and a workstation, the tensile testing machine is provided with a constant temperature control unit and a tensile data acquisition unit, the constant temperature control unit is arranged in the middle of the tensile data acquisition unit, the constant temperature control unit comprises a constant temperature chamber and a silicone sheet, the constant temperature chamber is arranged as a whole in a hollow circular column, the silicone sheets are respectively arranged at the upper and lower side openings of the constant temperature chamber, a cross hole is opened through the middle position of the silicone sheet, a liquid outlet and a liquid inlet are respectively provided at one end of the constant temperature chamber, a liquid outlet hose and a liquid inlet hose are respectively provided on the low-temperature constant temperature box, the liquid outlet hose and the liquid inlet hose are respectively connected to the liquid outlet and the liquid inlet, the constant temperature chamber is fixedly installed on the tensile testing machine through a fixing part, and a temperature monitoring collection unit and an imaging unit are provided in the constant temperature chamber.
[0007] According to the above technical scheme, the tensile testing machine includes a testing machine base, an operation panel, a support module, a beam module and a loading module, the operation panel is arranged on the front wall of the testing machine base, the support module includes a left stroke support and a right stroke support, the left stroke support and the right stroke support are symmetrically arranged at the upper end of the testing machine base, the beam module includes an upper beam and a lower beam, the upper beam is fixedly mounted on the left stroke support and the right stroke support, the lower beam is movably mounted on the left stroke support and the right stroke support through a limiting module, the loading module includes a servo motor and an output shaft, the servo motor is fixedly installed at the center position of the upper end of the testing machine base, the output end of the servo motor is fixedly mounted with the output shaft and the output shaft is threadedly connected in the lower beam.
[0008] According to the above technical solution, the limit module includes an upper limiter, a lower limiter and a limit sensor. The limit sensor is fixedly installed on the right end of the lower cross beam. The upper limiter and the lower limiter are respectively movably mounted on the right travel support. The upper limiter and the lower limiter are respectively arranged at the upper and lower ends of the limit sensor.
[0009] According to the above technical solution, the tension data acquisition unit includes a tension sensor, a disc, a rigid clamp and a tension data acquisition instrument. The tension sensor is fixedly installed at the middle position of the lower end of the upper crossbeam, the disc is fixedly installed at the middle position of the upper end of the lower crossbeam, the rigid clamp is mirror-imaged at the upper and lower ends of the constant temperature chamber, the rigid clamp at the upper end is fixedly installed at the lower end of the tension sensor, and the rigid clamp at the lower end is fixedly installed at the upper end of the disc. The tension data acquisition instrument is fixedly installed on the iron sheet extending to the right from the top of the right stroke pillar by fastening bolts, and the tension sensor, the tension data acquisition instrument and the workstation are electrically connected in sequence through wires.
[0010] According to the above technical solution, the temperature monitoring and collection unit includes a temperature sensor and a temperature data collector. A temperature measuring hole is opened through the right side wall of the constant temperature chamber, and a card slot is opened on the inner wall of the constant temperature chamber below the temperature measuring hole. The temperature sensor is fixedly installed in the card slot, and the temperature data collector is arranged between the temperature sensor and the workstation. The temperature sensor, the temperature data collector and the workstation are electrically connected in sequence through wires.
[0011] According to the above technical solution, the imaging unit includes an endoscopic camera group and a photo button. A photo hole is opened in the constant temperature chamber. The endoscopic camera group is fixedly installed in the photo hole. The photo button is arranged between the endoscopic camera group and the workstation. The endoscopic camera group, the photo button and the workstation are electrically connected in sequence through wires.
[0012] According to the above technical solution, the fixing part includes a support plate and a fixing ring, a clearance opening is opened through the middle of the support plate, and the clearance opening is composed of a rectangular through hole and a circular through hole, the constant temperature chamber is located in the circular through hole, the fixing ring is welded to the outer wall of the constant temperature chamber and is fixedly installed on the upper end of the support plate by fastening bolts, grooves are opened on both sides of the support plate, the left stroke support and the right stroke support are respectively located in the corresponding grooves, positioning holes are opened through the front and rear sides of the grooves, and the positioning holes are fixedly connected by fastening bolts.
[0013] According to the above technical solution, the workstation is installed with tension processing software, temperature acquisition software and video recording software.
[0014] According to the above technical solution, the following steps are included: a. Trim the root system of the target diameter into a suitable gauge length, pass it through the upper and lower silicone sheets of the constant temperature chamber, and fix the exposed ends of the root system with rigid clamps respectively; b. Set the low temperature thermostat to the required temperature for the test; c. When the temperature data received by the workstation from the temperature data collector through the electrical connection line is the same as the temperature required for the test, open the video recording software of the workstation and start recording the video of the test; d. Manually control the servo motor to rotate clockwise or counterclockwise through the operation panel on the front side of the tensile testing machine, thereby driving the lower crossbeam to rise or fall, which can facilitate the adjustment of the height of the rigid clamp below, and conveniently clamp the root system (9). When the bottom of the clamped root system drops, a tensile force is generated downward, and the tensile force is transmitted to the tensile sensor above; e. Manually operate the operation panel on the front side of the tensile testing machine to control the reversal of the servo motor and its speed, thereby controlling the descending rate of the rigid fixture at the upper end of the lower beam, thereby achieving natural stretching of the root system under low temperature conditions; f. The tension sensor transmits the tension data to the tension data acquisition instrument in real time through the electrical connection line, and the tension data acquisition instrument transmits the collected data to the workstation through the electrical connection line; g. When the tension processing software in the workstation recognizes that the root system is broken, the servo motor is controlled to stop running through the operation panel on the front side of the tensile testing machine, and then the recording of the test process is stopped; h. Finally, the workstation adjusts the frequency of collecting tension data and processes the test data to draw a tension curve, thereby expressing the tensile strength of the frozen roots and the change in force during the root tensile process. The video taken can be exported to express the deformation process and fracture of the roots during pulling.
[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) The constant temperature chamber provides a low temperature and constant temperature environment for the plant roots, and provides a small range of low temperature space, which can quickly cool down the test space, save test time and make the test environment temperature closer to the test target temperature; (2) The clamping ends of the plant roots are in a room temperature environment, which can reduce the possibility that the plant roots become brittle in a low temperature environment and are crushed by the clamps, thereby increasing the success rate of the test; (3) The servo motor controls the descending rate of the lower beam, and the tension sensor can be used to monitor the change of tension in real time, providing data support for the root tensile test; (4) The imaging unit uses an endoscope camera group and video recording software to record the root stretching process, providing imaging support for the study of root stretching experiments; (5) Through the combined use of workstations, temperature sensors, tension sensors, and endoscope camera groups, the functions of image monitoring, temperature monitoring, and tension data collection of the low-temperature root stretching process are realized. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the main view of the constant temperature chamber of the present invention; Figure 3 1 is a top view schematic diagram of the constant temperature chamber of the present invention; Figure 4 It is a schematic structural diagram of the fixing member of the present invention; Figure 5 is a schematic diagram of the first arrangement mode of the endoscope camera head group of the present invention; Figure 6 is a schematic diagram of the second arrangement mode of the endoscope camera head group of the present invention; In the figure: 1. Low temperature constant temperature box, 1-1. Liquid outlet hose, 1-2. Liquid inlet hose, 2. Tensile testing machine, 2-1. Testing machine base, 2-2. Operation panel, 2-3. Support module, 2-3-1. Left stroke support, 2-3-2. Right stroke support, 2-4. Beam module, 2-4-1. Upper beam, 2-4-2. Lower beam, 2-5. Loading module, 2-5-1. Servo motor, 2-5-2. Output shaft, 2-6. Limit module, 2-6-1. Upper limiter, 2-6-2. Lower limiter, 2-6-3. Limit sensor, 3. Workstation, 4. Constant temperature control unit, 4-1. Constant temperature chamber, 4-1-1. Liquid outlet, 4-1- 2. Liquid inlet, 4-1-3. Temperature measurement hole, 4-1-4. Card slot, 4-1-5. Camera hole, 4-2 Silicone sheet, 5. Tension data acquisition unit, 5-1. Tension sensor, 5-2. Disc, 5-3. Rigid fixture, 5-4. Tension data collector, 6. Fixing part, 6-1. Support plate, 6-2. Fixing ring, 6-3. Make way, 6-3-1. Rectangular through hole, 6-3-2. Circular through hole, 6-4. Groove, 6-5. Positioning hole, 7. Temperature monitoring and collection unit, 7-1. Temperature sensor, 7-2. Temperature data collector, 8. Imaging unit, 8-1. Endoscope camera assembly, 8-2. Photo button, 9. Root system. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] See also Figure 1-6The present invention provides a technical solution: a testing device and method for real-time monitoring of the low-temperature root tensile process, comprising a low-temperature constant temperature box 1, a tensile testing machine 2 and a workstation 3, the tensile testing machine 2 is provided with a constant temperature control unit 4 and a tensile data acquisition unit 5, the constant temperature control unit 4 is arranged in the middle of the tensile data acquisition unit 5, the constant temperature control unit 4 comprises a constant temperature chamber 4-1 and a silicone sheet 4-2, the constant temperature chamber 4-1 is arranged as a whole in a hollow circular column, the silicone sheet 4-2 is respectively arranged at the upper and lower side openings of the constant temperature chamber 4-1, A cross hole is formed through the middle of the silicone sheet 4-2, a liquid outlet 4-1-1 and a liquid inlet 4-1-2 are respectively formed at one end of the constant temperature chamber 4-1, a liquid outlet hose 1-1 and a liquid inlet hose 1-2 are respectively formed on the low temperature constant temperature box 1, the liquid outlet hose 1-1 and the liquid inlet hose 1-2 are respectively connected to the liquid outlet 4-1-1 and the liquid inlet 4-1-2, the constant temperature chamber 4-1 is fixedly mounted on the tensile testing machine 2 through a fixing member 6, and a temperature monitoring and collecting unit 7 and an imaging unit 8 are provided in the constant temperature chamber 4-1; When the present application is in use, a low-temperature constant temperature environment is provided to the plant root system mainly through a constant temperature control unit 4. The constant temperature chamber 4-1 is configured as a hollow circular column as a whole. The silicone sheets 4-2 are respectively arranged at the upper and lower side openings of the constant temperature chamber 4-1, so as to form a low-temperature constant temperature test chamber for the root system 9, and provide a small-scale low-temperature space, which can quickly cool down the low-temperature constant temperature test chamber, thereby saving test time and making the test environment temperature closer to the test target temperature. By setting the low-temperature constant temperature in conjunction with the low-temperature constant temperature box 1, a low-temperature environment required for a low-temperature tensile test is provided for the root system 9 inside the low-temperature constant temperature test chamber. The constant temperature chamber 4-1 is connected to the low-temperature constant temperature box 1. After the temperature of the refrigerant is set by the low-temperature constant temperature box 1, it flows through the liquid inlet hose 1-2 and then enters the cavity of the constant temperature chamber 4-1 through the liquid inlet 4-1-2, quickly cools down the low-temperature constant temperature test chamber, and then flows back to the low-temperature constant temperature box 1 through the liquid outlet 4-1-1 and the liquid outlet hose 1-1, completing the cycle. During the tensile test of the root system 9, both ends of the root system 9 are held and fixed by the tensile testing machine 2, and the middle is located in the constant temperature chamber 4-1. The clamped ends of the root system 9 are in a room temperature environment, which can reduce the situation where the root system 9 becomes brittle in a low temperature environment and is crushed by the clamp, thereby improving the success rate of the tensile test of the root system 9; During the tensile test of the root system 9, the tensile data is collected by the tensile data collection unit 5, and the change of the tensile force can be monitored in real time, providing data support for the tensile test of the root system 9; the low temperature monitoring inside the low temperature constant temperature test chamber is realized by the temperature monitoring collection unit 7, and the temperature change is monitored in real time; the root system tensile process is photographed by the imaging unit 8, providing imaging support for the research of the tensile test of the root system 9; all test data will be transmitted to the workstation 3 for summary; Specifically, the tensile testing machine 2 includes a testing machine base 2-1, an operation panel 2-2, a support module 2-3, a beam module 2-4 and a loading module 2-5, wherein the operation panel 2-2 is arranged on the front wall of the testing machine base 2-1, the support module 2-3 includes a left-stroke support 2-3-1 and a right-stroke support 2-3-2, and the left-stroke support 2-3-1 and the right-stroke support 2-3-2 are symmetrically arranged at the upper end of the testing machine base 2-1, and the beam module 2-4 includes an upper beam 2-4-1 and a lower beam 2-4-2, and the upper beam 2-4-1 is fixed to the front wall of the testing machine base 2-1. Sleeved on the left stroke support 2-3-1 and the right stroke support 2-3-2, the lower cross beam 2-4-2 is movably sleeved on the left stroke support 2-3-1 and the right stroke support 2-3-2 through the limit module 2-6, the loading module 2-5 includes a servo motor 2-5-1 and an output shaft 2-5-2, the servo motor 2-5-1 is fixedly installed at the center position of the upper end of the testing machine base 2-1, the output end of the servo motor 2-5-1 is fixedly installed with the output shaft 2-5-2 and the output shaft 2-5-2 is threadedly connected in the lower cross beam 2-4-2; The tensile testing machine 2 includes a testing machine base 2-1, an operation panel 2-2, a support module 2-3, a beam module 2-4 and a loading module 2-5. The testing machine base 2-1 provides support for the entire device. The support module 2-3, the beam module 2-4 and the loading module 2-5 are controlled by the operation panel 2-2. The upper beam 2-4-1, the lower beam 2-4-2, the left stroke support 2-3-1, the right stroke support 2-3-2, the servo motor 2-5-1 and the output shaft 2-5-2 are all common technical means in the technical field. They will not be described in detail here. Just select the appropriate model according to the needs. Specifically, the limit module 2-6 includes an upper limiter 2-6-1, a lower limiter 2-6-2 and a limit sensor 2-6-3, the limit sensor 2-6-3 is fixedly mounted on the right end of the lower cross beam 2-4-2, the upper limiter 2-6-1 and the lower limiter 2-6-2 are movably sleeved on the right travel support 2-3-2, and the upper limiter 2-6-1 and the lower limiter 2-6-2 are respectively arranged at the upper and lower ends of the limit sensor 2-6-3; The upper limiter 2-6-1, the lower limiter 2-6-2 and the limit sensor 2-6-3 can be used to limit the displacement of the lower beam 2-4-2. When the output shaft 2-5-2 of the servo motor 2-5-1 is controlled to rotate clockwise or counterclockwise through the test machine panel 2-2, the lower beam 2-4-2 is controlled to rise or fall, and the maximum displacement is limited to avoid collision interference when it moves up and down. Specifically, the tension data acquisition unit 5 includes a tension sensor 5-1, a disc 5-2, a rigid fixture 5-3 and a tension data acquisition instrument 5-4. The tension sensor 5-1 is fixedly installed at the middle position of the lower end of the upper beam 2-4-1, and the disc 5-2 is fixedly installed at the middle position of the upper end of the lower beam 2-4-2. The rigid fixture 5-3 is mirror-imaged at the upper and lower ends of the constant temperature chamber 4-1. The upper rigid fixture 5-3 is fixedly installed at the lower end of the tension sensor 5-1, and the lower rigid fixture 5-3 is fixedly installed at the upper end of the disc 5-2. The tension data acquisition instrument 5-4 is fixedly installed on the iron sheet extending to the right from the top of the right stroke support 2-3-2 by fastening bolts. The tension sensor 5-1, the tension data acquisition instrument 5-4 and the workstation 3 are electrically connected in sequence through wires; Through the arrangement of the tension sensor 5-1, the disk 5-2, the rigid clamp 5-3 and the tension data collector 5-4, the two ends of the root system 9 are clamped and fixed by the rigid clamps 5-3, and the upper and lower rigid clamps 5-3 are respectively arranged directly above and directly below the constant temperature chamber 4-1, so that the root system 9 can be clamped and fixed stably and conveniently, and the tension data collector 5-4 transmits the tension data to the workstation 3; Specifically, the temperature monitoring and collecting unit 7 includes a temperature sensor 7-1 and a temperature data collector 7-2. A temperature measuring hole 4-1-3 is provided through the right wall of the constant temperature chamber 4-1. A card slot 4-1-4 is provided on the inner wall of the constant temperature chamber 4-1 and below the temperature measuring hole 4-1-3. The temperature sensor 7-1 is fixedly installed in the card slot 4-1-4. The temperature data collector 7-2 is arranged between the temperature sensor 7-1 and the workstation 3. The temperature sensor 7-1, the temperature data collector 7-2 and the workstation 3 are electrically connected in sequence through wires. Through the setting of the temperature sensor 7-1 and the temperature data collector 7-2, the temperature sensor 7-1 is set in the card slot 4-1-4, and the card slot 4-1-4 is made of rubber material, which improves the accuracy of temperature measurement of the temperature sensor 7-1; Specifically, the imaging unit 8 includes an endoscope camera group 8-1 and a photo button 8-2. A photo hole 4-1-5 is provided in the constant temperature chamber 4-1. The endoscope camera group 8-1 is fixedly installed in the photo hole 4-1-5. The photo button 8-2 is arranged between the endoscope camera group 8-1 and the workstation 3. The endoscope camera group 8-1, the photo button 8-2 and the workstation 3 are electrically connected in sequence through wires. Through the setting of the endoscope camera group 8-1 and the camera button 8-2, the entire stretching process of the root system 9 can be monitored by video. The camera hole 4-1-5 is the same size as the endoscope camera, which can facilitate the horizontal placement of the endoscope camera. The lens is facing the center of the constant temperature chamber 4-1 where the sample is placed. The camera button 8-2 can control the endoscope camera group 8-1 to record video or take photos. Specifically, the fixing member 6 includes a support plate 6-1 and a fixing ring 6-2. A clearance opening 6-3 is opened through the middle of the support plate 6-1. The clearance opening 6-3 is composed of a rectangular through hole 6-3-1 and a circular through hole 6-3-2. The constant temperature chamber 4-1 is located in the circular through hole 6-3-2. The fixing ring 6-2 is welded to the outer wall of the constant temperature chamber 4-1 and is fixedly installed on the upper end of the support plate 6-1 by fastening bolts. Grooves 6-4 are opened on both sides of the support plate 6-1. The left stroke support 2-3-1 and the right stroke support 2-3-2 are respectively located in the corresponding grooves 6-4. Positioning holes 6-5 are opened through the front and rear sides of the grooves 6-4. The positioning holes 6-5 are fixedly connected by fastening bolts. The circular through hole 6-3-2 accommodates the constant temperature chamber 4-1, and the rectangular through hole 6-3-1 facilitates the disassembly and assembly of the liquid inlet 4-1-2. The fixing ring 6-2 is welded to the outer wall of the constant temperature chamber 4-1 and is an integrated structure with the constant temperature chamber 4-1. The constant temperature chamber 4-1 is fixed to the support plate 6-1 with fastening bolts through the two fixing holes on the fixing ring 6-2. The support plate 6-1 is tilted and placed between the left stroke pillar 2-3-1 and the right stroke pillar 2-3-2 and then laid flat. The grooves 6-4 at both ends of the support plate 6-1 can be stuck on the left stroke pillar 2-3-1 and the right stroke pillar 2-3-2, and then fixed to the left stroke pillar 2-3-1 and the right stroke pillar 2-3-2 with fastening bolts through the positioning holes 6-5 at both ends. The grooves 6-4 at both ends of the support plate 6-1 are relatively thin, which is convenient for slight deformation when fastening bolts are used to fix the support plate 6-1 better. Specifically, the workstation 3 is installed with tension processing software, temperature acquisition software and video recording software; Specifically, the following steps are included: a. Trim the root system 9 of the target diameter into a suitable gauge length, pass it through the upper and lower silicone sheets 4-2 of the constant temperature chamber 4-1, and fix the exposed ends of the root system 9 with rigid clamps 5-3 respectively; b. Set the low temperature thermostat 1 to the temperature required for the test; c. When the temperature data received by the workstation 3 from the temperature data collector 7-2 through the electrical connection line is the same as the temperature required for the test, the video recording software of the workstation 3 is opened to start recording the video of the test; d. Manually control the servo motor 2-5-1 to rotate clockwise or counterclockwise through the operation panel 2-2 on the front side of the tensile testing machine 2, thereby driving the lower crossbeam 2-4-2 to rise or fall, which can facilitate the adjustment of the height of the lower rigid clamp 5-3 and conveniently clamp the root system 9. When the bottom of the clamped root system 9 drops, a pulling force is generated downward, and the pulling force is transmitted to the upper tension sensor 5-1 at the same time; e. Manually operate the operation panel 2-2 on the front side of the tensile testing machine 2 to control the reversal and speed of the servo motor 2-5-1, thereby controlling the descending speed of the rigid clamp 5-3 at the upper end of the lower beam 2-4-2, thereby achieving natural stretching of the root system 9 under low temperature conditions; f. The tension sensor 5-1 transmits the tension data to the tension data collector 5-4 in real time through the electrical connection line, and the tension data collector 5-4 transmits the collected data to the workstation 3 through the electrical connection line; g. When the tension processing software in the workstation 3 recognizes that the root system 9 is broken, the servo motor 2-5-1 is controlled to stop running through the operation panel 2-2 on the front side of the tension testing machine 2, and then the recording of the test process is stopped; h. Finally, the workstation 3 adjusts the frequency of collecting tension data and processes the test data to draw a tension curve, thereby expressing the tensile strength of the frozen root system 9 and the change in force during the tensile process of the root system 9. The captured video can be exported to express the deformation process and fracture of the root system 9 during the pulling process.
[0019] Working principle: Example 1
[0020] When the present application is in use, a low-temperature constant temperature environment is provided to the plant root system mainly through a constant temperature control unit 4. The constant temperature chamber 4-1 is configured as a hollow circular column as a whole. The silicone sheets 4-2 are respectively arranged at the upper and lower side openings of the constant temperature chamber 4-1, so as to form a low-temperature constant temperature test chamber for the root system 9, and provide a small-scale low-temperature space, which can quickly cool down the low-temperature constant temperature test chamber, thereby saving test time and making the test environment temperature closer to the test target temperature. By setting the low-temperature constant temperature in conjunction with the low-temperature constant temperature box 1, a low-temperature environment required for a low-temperature tensile test is provided for the root system 9 inside the low-temperature constant temperature test chamber. The constant temperature chamber 4-1 is connected to the low-temperature constant temperature box 1. After the temperature of the refrigerant is set by the low-temperature constant temperature box 1, it flows through the liquid inlet hose 1-2 and then enters the cavity of the constant temperature chamber 4-1 through the liquid inlet 4-1-2, quickly cools down the low-temperature constant temperature test chamber, and then flows back to the low-temperature constant temperature box 1 through the liquid outlet 4-1-1 and the liquid outlet hose 1-1, completing the cycle. During the tensile test of the root system 9, the two ends of the root system 9 are clamped and fixed by two rigid clamps 5-3 on the tensile testing machine 2, and the middle is located in the constant temperature chamber 4-1. The clamped ends of the root system 9 are in a room temperature environment, which can reduce the situation where the root system 9 becomes brittle in a low temperature environment and is crushed by the clamp, thereby improving the success rate of the tensile test of the root system 9; During the tensile test of the root system 9, through the arrangement of the tensile sensor 5-1, the disc 5-2, the rigid clamp 5-3 and the tensile data acquisition instrument 5-4, the two ends of the root system 9 are clamped and fixed by the rigid clamps 5-3, and the upper and lower rigid clamps 5-3 are respectively arranged directly above and directly below the constant temperature chamber 4-1, so that the root system 9 can be clamped and fixed stably and conveniently. The tensile data acquisition unit 5 is used to collect the tensile data, and the change of the tensile force can be monitored in real time, providing data support for the tensile test of the root system 9. The tensile data acquisition instrument 5-4 transmits the tensile data to the workstation 3; The low temperature monitoring inside the low temperature constant temperature test chamber is realized by the temperature monitoring and collecting unit 7, and the temperature change is monitored in real time. The temperature sensor 7-1 and the temperature data collector 7-2 are set, and the temperature sensor 7-1 is set in the card slot 4-1-4. The card slot 4-1-4 is made of rubber material to improve the accuracy of the temperature measurement of the temperature sensor 7-1; The root stretching process is photographed by the imaging unit 8 to provide imaging support for the research of the root 9 stretching test. The endoscope camera group 8-1 and the camera button 8-2 are set to monitor the entire stretching process of the root 9. The camera hole 4-1-5 is the same size as the endoscope camera, which can facilitate the horizontal placement of the endoscope camera. The lens is facing the center of the constant temperature chamber 4-1 where the sample is placed. The camera button 8-2 can control the endoscope camera group 8-1 to record video or take photos. Figure 5 As shown, three endoscopic cameras are provided in the present application, the horizontal projection angle between every two endoscopic cameras is 120°, and the three cameras are distributed at different heights in the constant temperature chamber 4-1. Example 2
[0021] The difference between this embodiment and embodiment 1 lies in the arrangement of the endoscope camera group 8-1. This embodiment provides two arrangements of the endoscope camera group 8-1. The arrangement method 1 is as described in embodiment 1. In arrangement method 2, a total of nine endoscope cameras are arranged, three endoscope cameras are arranged on each layer, and the angle between the two endoscope cameras on each layer is 120°. The number and arrangement angle of the endoscope cameras can be adjusted according to the size of the constant temperature chamber 4-1 and observation needs.
[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A testing device and method for real-time monitoring of the tensile process of a low-temperature root system, comprising a low-temperature constant temperature box (1), a tensile testing machine (2) and a workstation (3), characterized in that: The tensile testing machine (2) is provided with a constant temperature control unit (4) and a tensile data acquisition unit (5). The constant temperature control unit (4) is arranged in the middle of the tensile data acquisition unit (5). The constant temperature control unit (4) comprises a constant temperature chamber (4-1) and a silicone sheet (4-2). The constant temperature chamber (4-1) is arranged as a whole in the form of a hollow circular column. The silicone sheet (4-2) is respectively arranged at the upper and lower side openings of the constant temperature chamber (4-1). A cross hole is provided in the middle of the silicone sheet (4-2). The constant temperature chamber (4-1) is provided with a plurality of holes. A liquid outlet (4-1-1) and a liquid inlet (4-1-2) are respectively provided at the ends of the thermostatic chamber (1); a liquid outlet hose (1-1) and a liquid inlet hose (1-2) are respectively provided on the thermostatic chamber (1); the liquid outlet hose (1-1) and the liquid inlet hose (1-2) are respectively connected to the liquid outlet (4-1-1) and the liquid inlet (4-1-2); the thermostatic chamber (4-1) is fixedly mounted on the tensile testing machine (2) via a fixing member (6); and a temperature monitoring and collecting unit (7) and an imaging unit (8) are provided in the thermostatic chamber (4-1).
2. A testing device and method for real-time monitoring of the low-temperature root tensile process according to claim 1, characterized in that: The tensile testing machine (2) comprises a testing machine base (2-1), an operation panel (2-2), a support module (2-3), a crossbeam module (2-4) and a loading module (2-5), wherein the operation panel (2-2) is arranged on the front wall of the testing machine base (2-1), the support module (2-3) comprises a left-stroke support (2-3-1) and a right-stroke support (2-3-2), wherein the left-stroke support (2-3-1) and the right-stroke support (2-3-2) are symmetrically arranged at the upper end of the testing machine base (2-1), and the crossbeam module (2-4) comprises an upper crossbeam (2-4-1) and a lower crossbeam (2-4-2), wherein the upper crossbeam (2-4-1) is fixed to the front wall of the testing machine base (2-1), wherein ...5) comprises a lower crossbeam (2-4-2) and a lower crossbeam (2-4-1). The fixed sleeve is arranged on the left stroke support (2-3-1) and the right stroke support (2-3-2); the lower cross beam (2-4-2) is movably sleeved on the left stroke support (2-3-1) and the right stroke support (2-3-2) through a limit module (2-6); the loading module (2-5) comprises a servo motor (2-5-1) and an output shaft (2-5-2); the servo motor (2-5-1) is fixedly mounted at the center position of the upper end of the testing machine base (2-1); the output end of the servo motor (2-5-1) is fixedly mounted with the output shaft (2-5-2), and the output shaft (2-5-2) is threadedly connected in the lower cross beam (2-4-2).
3. A testing device and method for real-time monitoring of the low-temperature root tensile process according to claim 2, characterized in that: The limit module (2-6) comprises an upper limiter (2-6-1), a lower limiter (2-6-2) and a limit sensor (2-6-3); the limit sensor (2-6-3) is fixedly mounted on the right end of the lower cross beam (2-4-2); the upper limiter (2-6-1) and the lower limiter (2-6-2) are respectively movably mounted on the right travel support (2-3-2); the upper limiter (2-6-1) and the lower limiter (2-6-2) are respectively arranged at the upper and lower ends of the limit sensor (2-6-3).
4. A testing device and method for real-time monitoring of the low-temperature root tensile process according to claim 1, characterized in that: The tension data acquisition unit (5) comprises a tension sensor (5-1), a disc (5-2), a rigid clamp (5-3) and a tension data acquisition instrument (5-4); the tension sensor (5-1) is fixedly mounted at the middle position of the lower end of the upper crossbeam (2-4-1); the disc (5-2) is fixedly mounted at the middle position of the upper end of the lower crossbeam (2-4-2); the rigid clamp (5-3) is mirror-imaged at the upper and lower ends of the constant temperature chamber (4-1); the upper rigid clamp (5-3) is fixedly mounted at the lower end of the tension sensor (5-1); the lower rigid clamp (5-3) is fixedly mounted at the upper end of the disc (5-2); the tension data acquisition instrument (5-4) is fixedly mounted on an iron sheet extending to the right from the top of the right travel support (2-3-2) by means of fastening bolts; the tension sensor (5-1), the tension data acquisition instrument (5-4) and the workstation (3) are electrically connected in sequence by means of wires.
5. A testing device and method for real-time monitoring of the low-temperature root tensile process according to claim 1, characterized in that: The temperature monitoring and collecting unit (7) comprises a temperature sensor (7-1) and a temperature data collector (7-2); a temperature measuring hole (4-1-3) is provided through the right side wall of the constant temperature chamber (4-1); a card slot (4-1-4) is provided on the inner wall of the constant temperature chamber (4-1) and below the temperature measuring hole (4-1-3); the temperature sensor (7-1) is fixedly installed in the card slot (4-1-4); the temperature data collector (7-2) is arranged between the temperature sensor (7-1) and the workstation (3); and the temperature sensor (7-1), the temperature data collector (7-2) and the workstation (3) are electrically connected in sequence via wires.
6. A testing device and method for real-time monitoring of the low-temperature root tensile process according to claim 1, characterized in that: The imaging unit (8) comprises an endoscope camera group (8-1) and a camera button (8-2); a camera hole (4-1-5) is provided in the constant temperature chamber (4-1); the endoscope camera group (8-1) is fixedly installed in the camera hole (4-1-5); the camera button (8-2) is arranged between the endoscope camera group (8-1) and the workstation (3); the endoscope camera group (8-1), the camera button (8-2) and the workstation (3) are electrically connected in sequence via wires.
7. A testing device and method for real-time monitoring of the low-temperature root tensile process according to claim 1, characterized in that: The fixing member (6) comprises a support plate (6-1) and a fixing ring (6-2); a clearance opening (6-3) is provided through the middle of the support plate (6-1); the clearance opening (6-3) is composed of a rectangular through hole (6-3-1) and a circular through hole (6-3-2); the constant temperature chamber (4-1) is located in the circular through hole (6-3-2); the fixing ring (6-2) is welded to the outer wall of the constant temperature chamber (4-1) and is fixedly mounted on the upper end of the support plate (6-1) by means of fastening bolts; grooves (6-4) are provided on both sides of the support plate (6-1); the left travel support (2-3-1) and the right travel support (2-3-2) are respectively located in the corresponding grooves (6-4); positioning holes (6-5) are provided through the front and rear sides of the grooves (6-4); the positioning holes (6-5) are fixedly connected by means of fastening bolts.
8. A testing device and method for real-time monitoring of the low-temperature root tensile process according to claim 1, characterized in that: The workstation (3) is installed with tension processing software, temperature acquisition software and video recording software.
9. A testing device and method for real-time monitoring of the low-temperature root tensile process according to any one of claims 1 to 8, characterized in that: The following steps are involved: a. Trim the root system (9) of the target diameter into a suitable gauge length, pass it through the upper and lower silicone sheets (4-2) of the constant temperature chamber (4-1), and fix the exposed ends of the root system (9) with rigid clamps (5-3) at the upper and lower ends respectively; b. Set the low temperature thermostat (1) to the required test temperature; c. When the temperature data received by the workstation (3) from the temperature data collector (7-2) through the electrical connection line is the same as the temperature required for the test, the video recording software of the workstation (3) is turned on to start recording the video of the test; d. Manually control the servo motor (2-5-1) to rotate clockwise or counterclockwise through the operation panel (2-2) on the front side of the tensile testing machine (2), thereby driving the lower crossbeam (2-4-2) to rise or fall, so as to facilitate the adjustment of the height of the lower rigid clamp (5-3) and conveniently clamp the root system (9). When the bottom of the clamped root system (9) descends, a pulling force is generated downward, and the pulling force is transmitted to the upper tensile sensor (5-1); e. manually operating the operation panel (2-2) on the front side of the tensile testing machine (2) to control the reversal of the servo motor (2-5-1) and its speed, thereby controlling the descending speed of the rigid clamp (5-3) at the upper end of the lower beam (2-4-2), thereby achieving natural stretching of the root system (9) under low temperature conditions; f. The tension sensor (5-1) transmits the tension data to the tension data acquisition device (5-4) in real time through the electrical connection line, and the tension data acquisition device (5-4) transmits the collected data to the workstation (3) through the electrical connection line; g. When the tension processing software in the workstation (3) recognizes that the root system (9) is broken, the servo motor (2-5-1) is controlled to stop running through the operation panel (2-2) on the front side of the tension testing machine (2), and then the recording of the test process is stopped; h. Finally, the workstation (3) adjusts the frequency of collecting tension data and processes the test data to draw a tension curve, thereby expressing the tensile strength of the frozen root system (9) and the change in force during the tensile process of the root system (9). The video taken can be exported to express the deformation process and fracture of the root system (9) during the pulling process.