Arch rod stress detection system and arch rod out-of-plane stability detection method

Abstract

The present invention relates to the field of greenhouse structure design, and provides an arch rod stress detection system and an arch rod out-of-plane stability detection method, comprising a frame for fixing the arch rod to be measured, a guide frame, the guide frame is provided with the skeleton to be measured, and the four corners of the guide frame are respectively connected with steel cables; a tension sensor is installed on the steel cable; an adjustment mechanism is respectively connected to the steel cable, and is used to adjust the tightness of the steel cable; a driver is installed on the frame and connected to the adjustment mechanism, and is used to adjust the length of the steel cable; a control module is connected to the tension sensor and the driver, receives the measurement data of the tension sensor and controls the operation of the driver. By constraining the deformation of the arch rod to be measured in the horizontal direction, the displacement and stress of the arch rod to be measured in the horizontal direction are dynamically and continuously detected. The length of the steel cable can also be adjusted by the driver to detect the constrained stress of the arch rod to be measured after deformation in the horizontal direction.

Description

Technical Field

[0001] The present invention relates to the technical field of stress detection, and in particular to an arch rod stress detection system and an arch rod out-of-plane stability detection method. Background Art

[0002] In the existing technology, lateral constraints on arch rods are mostly achieved by connecting circular tubes as longitudinal tie rods and then fixing them at both ends. If circular tubes are directly used as lateral constraints in tests, the influence of changes in the support length of the circular tubes on the stiffness may cause a mismatch between the stiffness of the lateral constraints in actual applications and distort the test results.

[0003] Due to the small cross-section, thin wall thickness, slenderness, and large span of the arch rod, the stiffness of the lateral restraint will have a significant impact on the test results. A variable stiffness lateral restraint device is urgently needed to achieve a realistic simulation of the longitudinal tie rod. Stiffness is a parameter that reflects the relationship between structural deformation and force. The stiffness of this device can be determined by the following formula: K = F / δ

[0004] Where: K is the stiffness, F is the resultant force in the horizontal direction, δ is the horizontal displacement, and the stiffness K is adjustable.

[0005] Existing technologies for arch rod stress detection usually focus on stress detection in the vertical direction of the arch rod. It is unable to measure the stress distribution in the horizontal direction of the arch rod under load conditions such as wind and snow, nor can it detect the constraint stress of the arch rod after horizontal deformation. Summary of the Invention

[0006] The present invention aims to address at least one of the technical problems existing in the related art. To this end, the present invention proposes an arch rod stress detection system. This system detects the horizontal constraint stress by constraining the horizontal deformation of the arch rod. Alternatively, the system can be controlled in parallel to cause the actuators to coordinately tighten or release the cables, thereby achieving a specific horizontal displacement of the arch rod and detecting the constraint stress after the arch rod is deformed.

[0007] The present invention also proposes a method for detecting the out-of-plane stability of an arch rod, which uses the above-mentioned arch rod stress detection system to perform stress detection on the arch rod to be detected.

[0008] An arch rod stress detection system according to an embodiment of the first aspect of the present invention includes a frame for fixing the arch rod to be tested;

[0009] A guide frame, wherein the arch rod to be measured is passed through the guide frame, and the four corners of the guide frame are respectively connected to steel cables;

[0010] a tension sensor, mounted on the steel cable;

[0011] Adjustment mechanisms, respectively connected to the steel cables, for adjusting the stretching and contraction of the steel cables;

[0012] a driver, mounted on the frame and connected to the adjustment mechanism, for adjusting the length of the steel cable;

[0013] The control module is connected to the tension sensor and the driver, receives measurement data from the tension sensor and controls the operation of the driver.

[0014] According to the arch rod stress detection system of an embodiment of the present invention, the greenhouse support detection system also includes a signal measuring instrument, which is used to collect and record the measurement data of each of the tension sensors and send it to the control module, so that the control module controls the operation of the driver.

[0015] According to the arch rod stress detection system of an embodiment of the present invention, an arch rod guide groove is opened in the middle of the guide frame for passing the arch rod to be tested; a row of freely rotatable support wheels are respectively installed on both sides of the arch rod guide groove.

[0016] According to the arch rod stress detection system of the embodiment of the present invention, the guide frame, the steel cable and the adjustment mechanism are respectively arranged in a same vertical plane in a group.

[0017] According to the arch rod stress detection system of an embodiment of the present invention, the guide frame, the steel cable and the adjustment mechanism are respectively installed at different vertical cross-sections of the arch rod to be measured to limit the horizontal deformation of the arch rod to be measured.

[0018] Furthermore, an embodiment of the present invention further provides a method for detecting out-of-plane stability of an arch rod, comprising: determining a guide frame installation point on the arch rod to be tested, installing the guide frame, inserting the arch rod to be tested into the guide frame, and fixing both ends of the arch rod to be tested to the frame;

[0019] Adjusting the adjustment mechanism to make the guide frame vertical, and recording the spatial coordinate information of the guide frame;

[0020] Applying tension to the arch rod to be measured to cause deformation of the arch rod to be measured, and recording measurement data of the tension sensor to determine the horizontal stress of each guide frame installation point on the arch rod to be measured;

[0021] The stress distribution of the arch rod to be measured is determined according to the horizontal stress of each guide frame installation point on the arch rod to be measured.

[0022] According to the method for detecting the out-of-plane stability of an arch rod according to an embodiment of the present invention, determining the guide frame installation point on the arch rod to be tested includes:

[0023] Determine the arc length of the arch rod to be measured, segment the arch rod to be measured according to preset intervals based on the measured arc length, and determine segmentation points;

[0024] The segmentation points are used as the guide frame installation points.

[0025] According to the method for detecting the out-of-plane stability of an arch rod according to an embodiment of the present invention, the method further includes:

[0026] A horizontal displacement distance is input into the control module, where the horizontal displacement distance is the deformation allowed to be generated by the arch rod to be measured in the horizontal direction. The control module determines the adjustment length information of the steel cable according to the spatial coordinate information and the horizontal displacement distance;

[0027] The driver adjusts the length of the steel cable according to the length adjustment information, so that the arch rod to be measured is deformed in the horizontal direction;

[0028] After the arch rod to be measured is stable, collecting the tension value measurement data of each tension sensor to determine the horizontal stress of each guide frame installation point on the arch rod to be measured;

[0029] The constraint stress distribution of the arch rod to be measured after deformation is determined based on the horizontal stress of each guide frame installation point on the arch rod to be measured.

[0030] According to the method for detecting the out-of-plane stability of an arch rod according to an embodiment of the present invention, determining the adjusted length information of the steel cable according to the spatial coordinate information and the horizontal displacement distance includes:

[0031] Determining the length of the first steel cable before the arch rod to be measured is deformed according to the spatial coordinate information;

[0032] Determining the length of the second steel cable after the arch rod to be measured is deformed according to the spatial coordinate information and the horizontal displacement distance;

[0033] The adjustment length information is determined according to the first steel cable length and the second steel cable length.

[0034] According to the method for detecting the out-of-plane stability of an arch rod according to an embodiment of the present invention, determining the horizontal stress at each guide frame installation point on the arch rod to be measured includes:

[0035] Determine the force direction of the steel cable after the arch rod to be measured is deformed according to the spatial coordinate information and the horizontal displacement distance,

[0036] The horizontal stress at each guide frame installation point on the arch rod to be measured is determined based on the force direction and the tension value measurement data.

[0037] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0038] An embodiment of the present invention provides an arch rod stress detection system, comprising a frame for fixing the arch rod to be measured, a guide frame, the arch rod to be measured is passed through the guide frame, and steel cables are connected to the four corners of the guide frame; a tension sensor is installed on the steel cable; an adjustment mechanism is respectively connected to the steel cable, and is used to adjust the stretching and tightening of the steel cable; a driver is installed on the frame and connected to the adjustment mechanism, and is used to adjust the length of the steel cable; a control module is connected to the tension sensor and the driver, receives the measurement data of the tension sensor and controls the operation of the driver. The driver tightens or releases the steel cable to maintain the pre-tightening force of the steel cable, so that the guide frame is kept in a fixed position in space, and at the same time, the tension sensor monitors the stress of the steel cable in real time, and dynamically and continuously detects the constraint stress of the arch rod to be measured in the horizontal direction. The control module and the driver can also collaboratively control the tightening or releasing of the steel cable to achieve deformation of the arch rod to be measured in the horizontal direction, and measure the constraint stress of the arch rod to be measured after deformation.

[0039] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 1 is a structural diagram of an arch rod stress detection system provided by an embodiment of the present invention;

[0042] Figure 2 1 is a schematic diagram of the installation of the arch rod stress detection system provided by an embodiment of the present invention;

[0043] Figure 3 is a structural diagram of a guide frame provided by an embodiment of the present invention;

[0044] Figure 4 This is a flow chart of the method for detecting the out-of-plane stability of an arch rod provided by an embodiment of the present invention. Figure 1 ;

[0045] Figure 5 This is a flow chart of the method for detecting the out-of-plane stability of an arch rod provided by an embodiment of the present invention. Figure 2 ;

[0046] Figure 6 4 is a diagram showing the calculation principle of the length adjustment information of the steel cable provided by an embodiment of the present invention.

[0047] Reference numerals:

[0048] 1. Framework;

[0049] 2. Guide frame; 21. Arch rod guide groove; 22. Support wheel;

[0050] 3. Steel cable;

[0051] 4. Tensile force sensor;

[0052] 5. Adjustment mechanism;

[0053] 6. Driver;

[0054] 7. Control module;

[0055] 8. Signal measuring instrument;

[0056] 9. Arch rod to be tested. DETAILED DESCRIPTION

[0057] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0058] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the embodiments of the present invention and to simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0060] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the reference terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, if there is no contradiction, a person of ordinary skill in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.

[0062] An embodiment of one aspect of the present invention, in combination with Figure 1 As shown, an arch rod stress detection system is provided, including a frame 1 for fixing an arch rod 9 to be measured, a guide frame 2, the arch rod 9 to be measured is passed through the guide frame 2, and the four corners of the guide frame 2 are respectively connected to steel cables 3; a tension sensor 4 is installed on the steel cable 3; an adjustment mechanism 5 is respectively connected to the steel cable 3, for adjusting the stretching and tightening of the steel cable 3; a driver 6 is installed on the frame 1 and connected to the adjustment mechanism 5, for adjusting the length of the steel cable 3; a control module 7 is connected to the tension sensor 4 and the driver 6, receives the measurement data of the tension sensor 4 and controls the operation of the driver 6. The steel cable 3 is tightened or released by the driver 6 to maintain the pre-tightening force of the steel cable 3, so that the guide frame 2 is kept in a fixed position in space. At the same time, the force condition of the steel cable 3 is monitored in real time by the tension sensor 4, and the constraint stress condition of the arch rod 9 to be tested in the horizontal direction is dynamically and continuously detected. The tightening or releasing of the steel cable 3 can also be coordinated by the control module 7 and the driver 6 to realize the deformation of the arch rod 9 to be tested in the horizontal direction and measure the constraint stress condition of the arch rod 9 to be tested after deformation.

[0063] It is understood that each of the four corners of the guide frame 2 is connected to a steel cable 3. Each steel cable 3 is equipped with a tension sensor 4 to measure the force applied to each steel cable 3. The end of each steel cable 3 is connected to an adjustment mechanism 5, which can adjust the tension of the steel cable 3 and apply a preload. Since it is impossible to ensure that the length of each steel cable 3 is exactly the right when installing the guide frame 2, the adjustment mechanism 5 is provided to manually adjust the length and tension of the steel cable 3 to facilitate installation. At the same time, the adjustment mechanism 5 is also connected to a driver 6, which can be controlled by a control module 7 to drive the adjustment mechanism 5 to adjust and achieve automatic adjustment of the steel cable length. The tension sensor 4 can collect, record, and transmit the tension information of the steel cable 3 to the control module 7 through a signal measuring instrument 8. The control module 7 can feedback the control position and control the action of the driver 6 according to the tension information and the preset tension target value.

[0064] In order to ensure the balanced force of the arch rod stress detection system and prevent the arch rod 9 to be tested from deflecting, Figure 2 As shown, the guide frame 2, the steel cable 3 and the adjustment mechanism 5 are arranged in a group and in the same vertical plane. The adjustment mechanism 5 maintains the preload in the steel cable 3, keeps the guide frame 2 stationary, and keeps the arch rod guide groove 21 in a vertical state. Furthermore, the driver 6 can be fixed to the frame 1.

[0065] It is understood that in order to obtain the stress constraint conditions at different locations on the arch rod 9 to be measured, multiple sets of arch rod stress detection systems can be installed at different locations on the arch rod 9 to be measured and integrated into the same signal measuring instrument 8 and control module 7 to obtain the stress constraint distribution of the entire arch rod 9 to be measured. The guide frames 2 are respectively installed at different vertical sections of the arch rod 9 to be measured to limit the horizontal deformation of the arch rod 9 to be measured.

[0066] In an alternative embodiment, in combination Figure 1 As shown, the arch rod stress detection system also includes a signal measuring instrument 8, which is used to collect and record the measurement data of each tension sensor 4 and send it to the control module 7, so that the control module 7 controls the operation of the driver 6. Optionally, the signal measuring instrument 8 is connected to the tension sensor 4 on each steel cable 3 respectively, and the measurement data of multiple tension sensors 4 are recorded, summarized and sent to the control module 7 by the signal measuring instrument 8. The control module 7 adjusts the operation of the driver 6 according to the received measurement data to adjust the length of the steel cable 3, so that the guide frame 2 maintains its original position unchanged or moves horizontally without deflection, thereby limiting the deformation of the arch rod 9 to be measured.

[0067] Optional, such as Figure 3As shown, the guide frame 2 has an arch guide groove 21 in the middle for inserting the arch rod 9 to be measured. A row of freely rotatable support wheels 22 are mounted on either side of the arch guide groove 21. Optionally, the width of the arch guide groove 21 is slightly larger than the cross-sectional width of the arch rod 9 to be measured to facilitate installation of the guide frame 2. Optionally, the support wheels 22 are arranged at equal intervals, with the spacing between two adjacent support wheels 22 being less than half the cross-sectional length of the arch rod 9 to be measured.

[0068] An embodiment of the present invention provides an arch rod stress detection system, comprising a frame 1 for fixing an arch rod 9 to be tested, a guide frame 2, wherein the arch rod 9 to be tested is passed through the guide frame 2, and steel cables 3 are connected to the four corners of the guide frame 2; a tension sensor 4 is mounted on the steel cable 3; an adjustment mechanism 5 is respectively connected to the steel cable 3 and used to adjust the extension and contraction of the steel cable 3; a driver 6 is mounted on the frame 1 and connected to the adjustment mechanism 5 and used to adjust the length of the steel cable 3; a control module 7 is connected to the tension sensor 4 and the driver 6, receives measurement data from the tension sensor 4 and controls the operation of the driver 6. The driver 6 tightens or releases the steel cable 3 to maintain the pre-tension of the steel cable 3, so that the guide frame 2 remains in a fixed position in space. At the same time, the tension sensor 4 monitors the stress of the steel cable 3 in real time, and dynamically and continuously detects the horizontal constraint stress of the arch rod 9 to be tested. The control module 7 and the driver 6 can also coordinately control the tightening or releasing of the steel cable 3 to achieve horizontal deformation of the arch rod 9 to be tested and measure the constraint stress of the deformed arch rod 9.

[0069] Another embodiment of the present invention provides a method for detecting the out-of-plane stability of an arch rod, which is applied to the above-mentioned arch rod stress detection device, referring to Figure 4 As shown, the arch rod out-of-plane stability detection method includes:

[0070] S401: Determine the installation point of the guide frame 2 on the arch rod 9 to be measured, install the guide frame 2, insert the arch rod 9 to be measured into the guide frame 2, and fix both ends of the arch rod 9 to be measured on the frame 1;

[0071] Alternatively, a method for determining the installation point of the guide frame 2 is to determine the arc length of the arch rod 9 to be measured, segment the arch rod 9 to be measured according to preset intervals based on the measured arc length, determine segmentation points, and use the segmentation points as the installation points of the guide frame 2. For example, the arc length of the arch rod 9 to be measured may be segmented at intervals of one meter, and the segmentation points may be used as the installation points of the guide frame 2. Alternatively, the segmentation may be performed at intervals of two meters, and this application does not impose any specific limitation on this.

[0072] S402: Adjust the adjustment mechanism 5 to make the guide frame 2 vertical, and record the spatial coordinate information of the guide frame 2;

[0073] Before the test, since it is impossible to ensure that the length of each steel cable 3 is exactly right during installation, the tensioning and releasing of each steel cable 3 can be manually adjusted through the adjustment mechanism 5, and the length of the steel cable 3 can be adjusted until the guide frame 2 is placed vertically and remains stationary, and the spatial coordinate information of the guide frame 2 is recorded. To facilitate subsequent analysis, the spatial coordinate information can be the coordinate information of the guide frame 2 relative to the frame 1.

[0074] S403: applying a tensile force to the arch rod 9 to be measured to deform the arch rod 9 to be measured, and recording the measurement data of the tensile sensor 4 to determine the horizontal stress of each installation point of the guide frame 2 on the arch rod 9 to be measured;

[0075] Simulate the stress conditions of the arch rod under load conditions such as wind and snow, apply tension to the arch rod 9 to be tested, cause the arch rod 9 to be tested to deform, and record the measurement data of each tension sensor 4 through the signal measuring instrument 8, and send the measurement data to the control module 7 for analysis, and then determine the horizontal stress of each guide frame 2 installation point on the arch rod 9 to be tested.

[0076] S404: Determine the stress distribution of the arch rod 9 to be measured based on the horizontal stress of each installation point of the guide frame 2 on the arch rod 9 to be measured.

[0077] In an alternative embodiment, reference Figure 5 As shown, the arch rod stress detection method also includes:

[0078] S501: Inputting a horizontal displacement distance into the control module 7, where the horizontal displacement distance is the deformation allowed to occur in the horizontal direction of the arch rod 9 to be measured, and the control module 7 determining the adjustment length information of the steel cable 3 according to the spatial coordinate information and the horizontal displacement distance;

[0079] Optionally, a method for determining the adjusted length information of the steel cable 3 is:

[0080] Determine the first steel cable length of the arch rod 9 to be measured before deformation according to the spatial coordinate information;

[0081] Determine the length of the second steel cable after the deformation of the arch rod 9 to be measured according to the spatial coordinate information and the horizontal displacement distance;

[0082] The adjustment length information is determined according to the first steel cable length and the second steel cable length.

[0083] Combine Figure 6 , the calculation formula for adjusting the length information is as follows:

[0084]

[0085]

[0086]

[0087]

[0088] Among them, the length of the first steel cable l n is the length of the steel cable before the arch rod 9 is deformed, and the length of the second steel cable l' n is the length of the steel cable after the deformation of the arch rod 9 to be measured, H is the vertical distance of the guide frame 2 relative to the frame 1, w is the horizontal distance of the guide frame 2 relative to the frame 1, and δω is the horizontal displacement distance of the guide frame 2.

[0089] S502: The driver 6 adjusts the length of the steel cable 3 according to the length adjustment information, so that the arch rod 9 to be measured is deformed in the horizontal direction;

[0090] After calculating the adjustment length information of each steel cable 3, the control module 7 generates a corresponding control signal and sends it to the corresponding driver 6. After receiving the control signal, the driver 6 works and further adjusts the length of the steel cable 3 by controlling the adjustment mechanism 5. Optionally, the driver 6 is a driving motor, and the adjustment mechanism 5 is a basket bolt or a similar structure. The output shaft of the driving motor is connected to the steel cable 3. The rotation of the driving motor drives the rotation of the output shaft to achieve the tightening or release of the steel cable 3, thereby achieving the purpose of adjusting the length of the steel cable 3, and then realizing the deformation of the arch rod 9 to be measured in the horizontal direction.

[0091] S503: After the arch rod 9 to be measured is stable, the tension value measurement data of each tension sensor 4 is collected to determine the horizontal stress of each installation point of the guide frame 2 on the arch rod 9 to be measured;

[0092] Optionally, the method for determining the horizontal stress at each installation point of the guide frame 2 on the arch rod 9 to be measured is:

[0093] According to the spatial coordinate information and the horizontal displacement distance, the force direction of the steel cable 3 after the arch rod 9 to be measured is determined,

[0094] According to the force direction and the tension value measurement data, a horizontal synthesis is performed according to the resultant force calculation formula to determine the horizontal stress of each installation point of the guide frame 2 on the arch rod 9 to be measured.

[0095] Specifically, when the arch rod 9 to be measured moves a preset horizontal displacement distance in the horizontal direction and reaches stability, the tension data of each steel cable 3 is obtained through the tension sensor 4, and then combined with the spatial coordinate information and horizontal displacement distance of the guide frame 2, the position of the guide frame 2 after deformation and the force direction of each steel cable 3 are determined, and the resultant force of the four steel cables 3 in the horizontal direction is calculated according to the calculation formula of the resultant force, and the horizontal force condition of each installation point of the guide frame 2 is obtained.

[0096] S504: Determine the constraint stress distribution of the arch rod 9 to be measured after deformation based on the horizontal stress at each installation point of the guide frame 2 on the arch rod 9 to be measured.

[0097] The constraint stress distribution of the deformed arch rod 9 is determined based on the horizontal stress at each guide frame 2 mounting point on the arch rod 9. Optionally, a display may be provided to display the constraint stress distribution of the deformed arch rod 9 on the display to improve visualization.

[0098] It should be noted that the order of the embodiments of the present application described above is for descriptive purposes only and does not represent the superiority or inferiority of the embodiments. The above description is of specific embodiments of this specification. In some cases, the actions or steps described in the specification can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0099] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that they may modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents; such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention and are therefore intended to be included within the scope of protection of this application.

Claims

1. An arch rod stress detection system, characterized in that: It comprises a frame (1) for fixing an arch rod (9) to be measured, A guide frame (2), wherein the arch rod (9) to be measured is passed through the guide frame (2), and the four corners of the guide frame (2) are respectively connected to steel cables (3); A tension sensor (4) is mounted on the steel cable (3); Adjustment mechanisms (5), respectively connected to the steel cables (3), for adjusting the stretching and contraction of the steel cables (3); A driver (6), mounted on the frame (1) and connected to the adjustment mechanism (5), for adjusting the length of the steel cable (3); a control module (7) connected to the tension sensor (4) and the driver (6), receiving measurement data from the tension sensor (4) and controlling the operation of the driver (6); An arch rod guide groove (21) is provided in the middle of the guide frame (2) for passing the arch rod (9) to be measured; a row of freely rotatable support wheels (22) are respectively installed on both sides of the arch rod guide groove (21).

2. The arch rod stress detection system according to claim 1, characterized in that: The arch rod stress detection system further includes a signal measuring instrument (8), which is used to collect and record the measurement data of each tension sensor (4) and send it to the control module (7), so that the control module (7) controls the operation of the driver (6).

3. The arch rod stress detection system according to claim 1 or 2, characterized in that: The guide frame (2), the steel cable (3) and the adjustment mechanism (5) are arranged in groups in the same vertical plane.

4. The arch rod stress detection system according to claim 1 or 2, characterized in that: The guide frame (2), the steel cable (3) and the adjustment mechanism (5) are respectively installed at different vertical cross sections of the arch rod (9) to be measured to limit the horizontal deformation of the arch rod (9) to be measured.

5. A method for detecting the out-of-plane stability of an arch rod, using the arch rod stress detection system according to any one of claims 1 to 4, characterized in that: The method comprises: Determining a guide frame installation point on the arch rod (9) to be measured, installing the guide frame (2), inserting the arch rod (9) to be measured into the guide frame (2), and fixing both ends of the arch rod (9) to be measured on the frame (1); Adjusting the adjustment mechanism (5) to make the guide frame (2) vertical, and recording the spatial coordinate information of the guide frame (2); Applying a tensile force to the arch rod (9) to be measured to cause the arch rod (9) to be measured to deform, and recording measurement data of the tensile force sensor (4) to determine the horizontal stress of each guide frame (2) installation point on the arch rod (9) to be measured; Determining the stress distribution of the arch rod (9) to be measured based on the horizontal stress of each guide frame (2) installation point on the arch rod (9) to be measured; The method further comprises: A horizontal displacement distance is input into the control module (7), wherein the horizontal displacement distance is the deformation allowed to be generated by the arch rod (9) to be measured in the horizontal direction, and the control module (7) determines the adjustment length information of the steel cable (3) based on the spatial coordinate information and the horizontal displacement distance; The driver (6) adjusts the length of the steel cable (3) according to the adjustment length information, so that the arch rod (9) to be measured is deformed in the horizontal direction; After the arch rod (9) to be measured is stabilized, the tension value measurement data of each tension sensor (4) is collected to determine the horizontal stress of each guide frame installation point on the arch rod (9) to be measured; The constraint stress distribution of the arch rod (9) to be measured after deformation is determined based on the horizontal stress of each guide frame installation point on the arch rod (9) to be measured.

6. The method for detecting the out-of-plane stability of an arch rod according to claim 5, characterized in that: Determining the guide frame installation point on the arch rod (9) to be measured includes: Determining the arc length of the arch rod (9) to be measured, segmenting the arch rod (9) to be measured according to preset spacing based on the measured arc length, and determining segmentation points; The segmentation points are used as the guide frame installation points.

7. The method for detecting the out-of-plane stability of an arch rod according to claim 6, characterized in that: Determining the adjusted length information of the steel cable (3) based on the spatial coordinate information and the horizontal displacement distance includes: Determining the first steel cable length of the arch rod (9) to be measured before deformation according to the spatial coordinate information; Determining the length of the second steel cable after the deformation of the arch rod (9) to be measured according to the spatial coordinate information and the horizontal displacement distance; The adjustment length information is determined according to the first steel cable length and the second steel cable length.

8. The method for detecting the out-of-plane stability of an arch rod according to claim 7, wherein: Determining the horizontal stress of each guide frame installation point on the arch rod (9) to be measured includes: Determining the force direction of the steel cable (3) after the arch rod (9) to be measured is deformed based on the spatial coordinate information and the horizontal displacement distance; The horizontal stress of each guide frame installation point on the arch rod (9) to be measured is determined based on the force direction and the tension value measurement data.

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