Intelligent cable / rod internal force in-situ calibration method and device

Abstract

The invention discloses an intelligent cable / rod internal force in-situ calibration method and device, and the method comprises the following steps: S1, installing a counterforce support at the outer side of an anchoring section of a bearing cable / rod; s2, applying power to slowly adjust the stroke of the counter-force support in the cable / rod direction, and promoting the counter-force support to bear loads step by step; s3, after the counter-force support bears the load, continuously applying power to slowly adjust the stroke of the counter-force support in the cable / rod direction, and collecting the resultant force of the counter-force support in real time; and S4, according to the mechanical equilibrium relation of the cable / rod axial force, the anchoring section stress and the reaction support resultant force, the force value of the reaction support resultant force and the smooth transition section in the time curve is obtained, namely, the actual stress of the cable / rod in the current state is obtained, the actual stress is the actual stress standard value of the cable / rod before calibration, and the actual stress standard value is used for calibrating the monitoring value. According to the invention, in-situ calibration of stress of the cable / rod can be realized, and value traceability of monitoring data is realized.

Description

Technical Field

[0001] This invention relates to engineering fields such as bridges, buildings, wind power, and hydropower. Specifically, it relates to a method and device for in-situ calibration of internal forces in intelligent cables / rods. Background Technology

[0002] Cables / rods are key force-transmitting components in structures. For example, large building roof structures are anchored by cables / rods. Due to material degradation, limitations in construction techniques, and overload operation, cables / rods inevitably have some defects. To accurately assess the safety of cable structures, obtaining precise anchoring forces is crucial.

[0003] Cables / rods are tension members subjected to long-term loads. Once installed, it is very difficult to detect the tension (cable force). Therefore, the existing technology directly installs force sensors on the cables / rods to monitor the force on them in real time. However, this method cannot achieve in-situ calibration, and the monitoring data cannot be traced back to its source. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent cable / rod internal force in-situ calibration method and device, which can perform in-situ calibration of monitored cable / rod force data and realize traceability of the monitored data.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution: S1: Install a counter-energy adjustment stroke or a counter-force support that adjusts the stroke and monitors the internal force on the outside of the anchorage section of the cable / rod bearing the load; S2: Apply power to slowly adjust the stroke of the reaction support along the cable / rod direction, so that the reaction support gradually bears the load; S3: After the reaction support bears the load, continue to apply power to slowly adjust the stroke of the reaction support along the cable / rod direction, and collect the resultant force of the reaction support in real time; S4: Based on the mechanical balance relationship between the axial force of the cable / rod, the force of the anchorage section, and the resultant force of the reaction support, obtain the force value of the smooth transition section in the resultant force of the reaction support and the time curve, which is the actual force of the cable / rod under the current state. This actual force is the standard value of the actual force of the cable / rod before calibration, and this standard value of the actual force is used to calibrate the monitoring value.

[0006] In this scheme, when it is necessary to calibrate the force data of the cable / rod under load, a reaction support is first installed on the outside of the anchorage section of the cable / rod. The anchorage section is an existing technology for connecting the cable / rod to the building, and it bears tensile force. After the reaction support is installed, its initial state is zero force. A reaction support that can monitor internal forces and adjust its stroke is connected in series at one end of the reaction support adjacent to the cable / rod. The reaction support itself can monitor internal forces and adjust its stroke along the cable / rod axis. The tensile force on the cable / rod is along the cable / rod axis. Initially, the reaction support does not bear load in the cable / rod axis direction. Then, by applying power to the reaction support, its stroke along the cable / rod axis direction is changed. As the load increases, the height of the reaction support gradually increases and it begins to push against the reaction support. The reaction support transfers the pushing force of the reaction support to the anchorage section. As the reaction support gradually begins to bear the load, the tension in the anchorage section gradually decreases. The reaction support collects the resultant force of the cable / rod axial direction in real time as the power increases. The smooth transition section refers to a period of time in which the resultant force is in a smooth transition section. During this period, the resultant force can be considered to remain basically unchanged. At this time, the tension in the anchorage section is zero, and the tensile load of the cable / rod is just fully applied to the reaction support. At this time, the resultant force is the tension in the cable / rod. The resultant force during this period is the actual standard value of the cable / rod before calibration. This actual standard value of the force is used to calibrate the monitoring value.

[0007] Optionally, the reaction support includes a reaction frame and a measurement and control device connected in series at the end of the reaction frame. The reaction frame and / or the measurement and control device can adjust the stroke or adjust the stroke and monitor the internal force. Power is applied to slowly adjust the stroke of the reaction support, causing the reaction support to gradually bear the load. After the reaction support bears the load, power is continued to be applied to slowly adjust the stroke of the reaction support along the cable / rod axis. The resultant force data in the cable / rod axis direction is collected in real time, and the relationship curve between the resultant force and time is obtained. Based on the relationship curve between the resultant force and time, the standard value of the resultant force when it is in a smooth transition within a time period is obtained. The tension of the cable / rod is obtained from the mechanical principles and equilibrium relationship as the calculated force value for that time period. Then, based on the mechanical equilibrium relationship of the cable / rod force, the anchorage section force, and the reaction support force when the resultant force is constant or relatively stable, the actual force standard value of each point is used to calibrate the corresponding monitoring value.

[0008] Optionally, the resultant force is the resultant force on the reaction support along the cable / rod axis, and the tension on the cable / rod is equal to the sum of the force on the reaction support and the tension on the anchorage section. When the reaction support is initially installed, the force is zero, and the tension on the cable / rod is equal to the tension on the anchorage section. After the stroke of the monitoring and control device increases and it bears the load until the monitored resultant force remains unchanged or relatively stable, the force on the anchorage section is zero. At this time, the tension on the cable / rod is completely balanced by the reaction support. After the stroke of the monitoring and control device continues to increase, the tension on the cable / rod is equal to the difference between the force on the reaction support and the pressure on the anchorage section.

[0009] Optionally, the reaction support consists of a first reaction plate, a second reaction plate, and screws. First, the first reaction plate is installed on one side of the anchoring section, and then the second reaction plate is installed on the other side of the anchoring section. The first reaction plate is sleeved on the cable / rod, and then the first reaction plate and the second reaction plate are connected by two screws. The measurement and control device is connected in series to the screw on the outside of the first reaction plate.

[0010] Optionally, a first nut located outside the measuring and control device is installed on the screw. The first nut restricts the displacement on one side of the measuring and control device. Second nuts located on both sides of the second reaction plate are installed on the screw. Power is applied to the measuring and control device to change its stroke along the cable / rod axis. The measuring and control device acts on the first reaction plate in the opposite direction of the force on the cable / rod and begins to gradually bear force until the resultant force collected by the measuring and control device remains unchanged or relatively stable within a certain period of time, at which point the application of power is stopped.

[0011] The intelligent cable / rod internal force in-situ calibration device includes a reaction support installed on the outside of the cable / rod anchorage section and a measurement and control device connected in series with the reaction support near one end of the cable / rod, which can adjust the stroke or monitor the internal force and adjust the stroke. The measurement and control device is a hydraulic basin structure, a wedge block structure, or a jack. After the stroke of the measurement and control device changes along the cable / rod axis, it acts on the reaction support in the opposite direction of the cable / rod force to gradually bear the load.

[0012] Optionally, the cable / rod is a sling, and the anchoring section includes a cable head, a connecting screw, and an ear plate. One end of the cable head is connected to the sling, and the other end is threaded to the connecting screw. The end of the connecting screw away from the sling is threaded to the ear plate, and the end of the ear plate away from the sling is connected to the building. The reaction support includes a first reaction plate, a second reaction plate, and a screw. The first reaction plate is sleeved on the sling and located outside the cable head. The second reaction plate is located at the outer end of the ear plate. The screw passes through the first reaction plate and the second reaction plate. One end of the screw is provided with a first locking nut located outside the first reaction plate, and the other end is provided with two second locking nuts located on both sides of the second reaction plate. The measurement and control device is connected in series between the first locking nut and the first reaction plate.

[0013] Optionally, the measurement and control device includes a first top plate and a first bottom plate sleeved on the sling. The first top plate and the first bottom plate form an annular basin. A suitable force-measuring elastomer is provided in the basin. A first pressure sensor is provided on the side wall of the basin. The working end of the first pressure sensor passes through the side wall of the basin and contacts the side wall of the force-measuring elastomer. A guide plate is provided on the side of the force-measuring elastomer adjacent to the first reaction plate. A hydraulic chamber is formed between the guide plate and the inner wall of the basin. An oil injection channel connected to the hydraulic chamber is provided on the side wall of the basin. A sealing bolt is provided at the inlet end of the oil injection channel.

[0014] Optionally, the measurement and control device includes a second top plate and a second bottom plate sleeved on the sling. An adjustment cavity is formed between the second top plate and the second bottom plate. Two adjustment blocks are symmetrically distributed in the adjustment cavity about the axis of the sling. The adjustment blocks are in oblique straight contact with the side wall of the second top plate and in straight contact with the side wall of the second bottom plate. A second pressure sensor is provided between the two adjustment blocks.

[0015] Optionally, the first reaction plate is composed of two symmetrical semicircular plates, with a semicircular hole in the middle of the straight edge of each semicircular plate. When the two semicircular plates are joined together, the two semicircular holes form a circular hole, and the sling is located inside the circular hole. The two semicircular plates are locked together by anchor bolts. The second reaction plate is composed of two symmetrical rectangular plates. When the two rectangular plates are joined together, they are clamped to the outer end of the ear plate and locked together by anchor bolts.

[0016] The beneficial effects of this invention are as follows: In existing technologies, when a cable / rod is under stress, if the tension is to be detected, the cable / rod needs to be unloaded first, and then sensors and monitoring systems need to be installed for detection. The unloading operation is cumbersome, resulting in low efficiency of stress detection.

[0017] In this invention, when it is necessary to calibrate the force on a cable / rod under load, a reaction support is first installed on the outside of the anchorage section of the cable / rod. After the reaction support is installed, its initial force is zero, and the anchorage section initially bears the tension of the cable / rod. The tension on the cable / rod is equal to the tension on the anchorage section. A measuring and control device that can monitor internal forces and adjust its travel is connected in series at one end of the reaction support near the cable / rod. The measuring and control device can monitor internal forces and adjust its own travel along the cable / rod axis. The tension on the cable / rod is along the cable / rod axis. Initially, the measuring and control device does not bear any load in the cable / rod axis direction. Then, by applying power to the measuring and control device, its travel along the cable / rod axis direction is changed. As the power increases, the height of the measuring and control device gradually increases and begins to push the reaction support. The force support transmits the jacking force of the monitoring and control device to the anchorage section. As the monitoring and control device gradually begins to bear the load, the tension in the anchorage section gradually decreases. The monitoring and control device collects the resultant force of the cable / rod axial direction in real time as the power continuously increases, until the resultant force remains constant or relatively stable for a certain period of time. At this time, the tension in the anchorage section is zero, and the tension load of the cable / rod is exactly applied to the reaction support. The resultant force at this time is the tension in the cable / rod. The resultant force within this period of time is the actual standard value of the cable / rod force before calibration. This actual standard value of the force is used to calibrate the monitoring value. Then, based on the mechanical balance relationship of the cable / rod force, the anchorage section force, and the reaction support force before and after the resultant force is constant or relatively stable, the actual standard value of the force at each point is used to calibrate the corresponding monitoring value. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the method flow of the present invention; Figure 2 This is a structural diagram of the reaction support, monitoring and control device, and slings after assembly. Figure 3 for Figure 2 The right view; Figure 4 for Figure 2 The left view; Figure 5 This is a structural diagram of the two semicircular plates after they are joined together. Figure 6 This is a structural diagram of a measurement and control device; Figure 7 for Figure 6 A magnified view of a section at point A in the middle; Figure 8 This is another structural diagram of the measurement and control device; Figure 9 This is a graph of the resultant force versus time.

[0019] Reference numerals: 1-Sling, 2-Anchoring section, 201-Sling head, 202-Connecting screw, 203-Ear plate, 3-Measurement and control device, 4-First reaction plate, 401-Semicircular plate, 402-Semicircular hole, 403-Circular hole, 5-Second reaction plate, 501-Rectangular plate, 6-Screw, 7-First locking nut, 8-Second locking nut, 9-Anchoring bolt, 10-First pressure sensor, 11-Sealing bolt, 12-First top plate, 13-First bottom plate, 14-Force measuring elastic body, 15-Guide plate, 16-Hydraulic chamber, 17-Basin cavity, 18-Second top plate, 19-Second bottom plate, 20-Adjusting block, 21-Second pressure sensor. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0023] The in-situ calibration method for internal forces in intelligent cables / rods includes the following steps: S1: Install a counter-energy adjustment stroke or a counter-force support that adjusts the stroke and monitors the internal force on the outside of the anchorage section 2 of the cable / rod. S2: Apply power to slowly adjust the stroke of the reaction support along the cable / rod direction, so that the reaction support gradually bears the load; S3: After the reaction support bears the load, continue to apply power to slowly adjust the stroke of the reaction support along the cable / rod direction, and collect the resultant force of the reaction support in real time; S4: Based on the mechanical balance relationship between the axial force of the cable / rod, the force on the anchorage section 2, and the resultant force of the reaction support, the force value of the resultant force of the reaction support and the smooth transition section in the time curve is obtained, which is the actual force of the cable / rod under the current state. This actual force is the standard value of the actual force of the cable / rod before calibration, and this standard value of the actual force is used to calibrate the monitoring value.

[0024] In this embodiment, as Figure 1 and Figure 2As shown, in this embodiment, the cable / rod is a sling 1. The sling 1 bears tension, and the direction of the tension is along the axis of the sling 1. When it is necessary to test the stress of the sling 1 under load, a reaction bracket is first installed on the outside of the anchoring section 2 of the sling 1. The anchoring section 2 is a prior art for connecting the sling 1 to the building. The anchoring section 2 includes a cable head 201, a connecting screw 202, and an ear plate 203. One end of the cable head 201 is fixedly connected to the sling 1, and the other end is threaded to the left end of the connecting screw 202. The right end of the connecting screw 202 is threaded to the ear plate 203. The right end of the ear plate 203 can be connected to the building or to another section of the sling 1. The left end of the reaction support is located outside the cable head 201 and is attached to the end of the cable head 201. The left end of the reaction support is sleeved on the sling 1. The right end of the reaction support is connected and fixed to the right end of the ear plate 203. The control device 3 is connected in series to the left end of the reaction support. Under the action of external force, the left end of the reaction support can generate a tendency to move relative to the sling 1. The control device 3 adopts a hydraulic basin 17 structure, a wedge block, or a jack. The height of the control device 3 can be adjusted by injecting hydraulic oil, or by the relative movement of the wedge block, or by directly adjusting the height through the jack. The control device 3 can monitor the force and adjust its own height.

[0025] Initially, anchorage section 2 fully bears the tension of sling 1, while the reaction support experiences zero force. The tension in anchorage section 2 is equal to the tension in sling 1, and this tension is along the axis of sling 1. Initially, the control device 3 does not bear any load along the axis of sling 1. Then, by applying power to the control device 3, its travel along the axis of sling 1 (i.e., its height along the axis of sling 1) is changed. As the power increases, the travel of the control device 3 along the axis of sling 1 gradually increases and begins to push against the reaction support. The reaction support transmits the pushing force of the control device 3 to the cable head 201 of anchorage section 2. As the control device 3 gradually opens... As the load begins to be borne, the tension on the anchorage section 2 gradually decreases. The monitoring and control device 3 collects the resultant force along the axis of the sling 1 in real time as the power increases. The smooth transition section refers to the period when the resultant force remains unchanged or relatively stable, or when there is a smooth transition. This period is relatively short. At this time, the tension on the anchorage section 2 is zero, and the tension of the sling 1 acts entirely on the reaction support. The tension of the sling 1 is equal to the force on the reaction support. The resultant force detected by the monitoring and control device 3 at this time is the tension on the sling 1. The resultant force within this period is the actual standard value of the cable / rod before calibration. This actual standard value of the force is used to calibrate the monitoring value.

[0026] Furthermore, the reaction support includes a reaction frame and a measurement and control device 3 connected in series at the end of the reaction frame. The reaction frame and / or the measurement and control device 3 can adjust the stroke or adjust the stroke and monitor the internal force. Power is applied to slowly adjust the stroke of the reaction support, causing the reaction support to gradually bear the load. After the reaction support bears the load, power is continued to be applied to slowly adjust the stroke of the reaction support along the cable / rod axis. The resultant force data in the cable / rod axis direction is collected in real time, and the relationship curve between the resultant force and time is obtained. Based on the relationship curve between the resultant force and time, the standard value of the resultant force when it is constant or in a smooth transition within a time period is obtained. The tension of the sling 1 is obtained as the calculated force value within this time period based on the mechanical principles and equilibrium relationship. Then, based on the mechanical equilibrium relationship of the cable / rod force, the anchorage section 2 force, and the reaction support force when the resultant force is constant or relatively stable, the actual force standard value of each point is used to calibrate the corresponding monitoring value.

[0027] Furthermore, the resultant force is the resultant force on the reaction support along the cable / rod axis. The tension on the sling 1 is equal to the sum of the force on the reaction support and the tension on the anchoring section 2. When the reaction support is initially installed, the force is zero, and the tension on the sling 1 is equal to the tension on the anchoring section 2. After the stroke of the measuring and control device 3 increases and it bears the load until the monitored resultant force remains unchanged or relatively stable, the force on the anchoring section 2 is zero, and the tension on the sling 1 is equal to the force on the reaction support. After the stroke of the measuring and control device 3 continues to increase, the tension on the sling 1 is equal to the difference between the force on the reaction support and the pressure on the anchoring section 2.

[0028] Specifically, when the measurement and control device 3 begins to be subjected to force, the data of resultant force versus time are collected in real time, and a curve showing the relationship between resultant force and time is obtained. This curve is divided into three stages: Phase 1: The tension on sling 1 is equal to the sum of the force on the reaction support and the tension on the anchorage section 2. Initially, the force on the reaction support is zero, and the tension on sling 1 is equal to the tension on the anchorage section 2.

[0029] After the power is applied, as the travel of the measuring and control device 3 in the axial direction of the sling 1 increases, a jacking force will be generated on the reaction support. This jacking force is transmitted to the cable head 201 and the connecting screw 202 of the anchoring section 2. As the travel of the measuring and control device 3 gradually increases, the reaction support intervenes in the force system of the anchoring section 2, and the tension on the connecting screw 202 gradually decreases. The resultant force detected by the measuring and control device 3 in this stage is the sum of the tension on the connecting screw 202 and the force on the reaction support. In this stage, the resultant force and time are in an upward slope segment.

[0030] Second stage: The power continues to increase until the thread clearance between the connecting screw 202 and the cable head 201 and ear plate 203 changes from the right to the left. During this stage, the connecting screw 202 gradually transitions from a tensile state to a compressive state, and the resultant force and time are in a linear and gradual transition period (e.g., Figure 9 (As shown in the smooth section), when the tension on the connecting screw 202 becomes zero, the reaction support fully bears the tension of the sling 1. The resultant force detected by the measuring and control device 3 is the force on the reaction support. The resultant force during this time period is the actual standard value of the cable / rod before calibration. This actual standard value of the force is used to calibrate the monitoring value. Then, based on the mechanical balance relationship of the cable / rod force, the anchorage section 2 force, and the reaction support force before and after the resultant force is constant or relatively stable, the actual standard value of the force at each point is used to calibrate the corresponding monitoring value.

[0031] Third stage: Power continues to be applied, the stroke of the measuring and control device 3 continues to increase, and the load measured by the measuring and control device 3 also gradually increases. At this time, the connecting screw 202 begins to be compressed. The load measured by the measuring and control device 3 in this stage is the difference between the pressure on the connecting screw 202 and the force on the reaction support. Moreover, the pressure on the connecting screw 202 continues to increase, and the curve is another rising sloping line segment.

[0032] Furthermore, the reaction support is composed of a first reaction plate 4, a second reaction plate 5, and a screw 6. First, the first reaction plate 4 is installed to one side of the anchoring section 2, and then the second reaction plate 5 is installed to the other side of the anchoring section 2. The first reaction plate 4 is sleeved on the sling 1, and then the first reaction plate 4 and the second reaction plate 5 are connected by two screws 6. The measurement and control device 3 is connected in series to the screw 6 on the outside of the first reaction plate 4.

[0033] Furthermore, a first nut located outside the measuring and control device 3 is installed on the screw 6. The first nut restricts the displacement of one side of the measuring and control device 3. Second nuts located on both sides of the second reaction plate 5 are installed on the screw 6. Power is applied to the measuring and control device 3 to change its stroke along the axis of the sling 1. The measuring and control device 3 acts on the first reaction plate 4 in the opposite direction of the force on the sling 1 and begins to gradually bear force until the resultant force collected by the measuring and control device 3 remains unchanged or relatively stable within a certain period of time, at which point the application of power is stopped.

[0034] One screw 6 corresponds to one measuring and control device 3. More than two screws 6 can be set. The resultant force monitored by the measuring and control device 3 refers to the sum of the forces on multiple screws 6 on the reaction frame.

[0035] like Figure 2 As shown, the intelligent cable / rod internal force in-situ calibration device includes a reaction support installed on the outside of the anchoring section 2 of the cable 1 and a measurement and control device 3 connected in series with the reaction support near one end of the cable 1, which can monitor the internal force and adjust the stroke. The measurement and control device 3 is a hydraulic basin structure, a wedge block structure, or a jack. After the stroke of the measurement and control device 3 changes along the axial direction of the cable 1, it acts on the reaction support in the opposite direction of the force on the cable 1 and begins to gradually bear the load.

[0036] One screw 6 corresponds to one measuring and control device 3. More than two screws 6 can be set. The resultant force monitored by the measuring and control device 3 refers to the sum of the forces on multiple screws 6 on the reaction support.

[0037] Furthermore, the sling 1 is a sling 1, and the anchoring section 2 includes a sling head 201, a connecting screw 202, and an ear plate 203. One end of the sling head is connected to the sling 1, and the other end is threadedly connected to the connecting screw 202. The end of the connecting screw 202 away from the sling 1 is threadedly connected to the ear plate 203. The end of the ear plate 203 away from the sling 1 is connected to the building. The reaction support includes a first reaction plate 4, a second reaction plate 5, and a screw 6. The first reaction plate 4 is sleeved on the sling 1 and located outside the sling head 201. The second reaction plate 5 is located at the outer end of the ear plate 203. The screw 6 passes through the first reaction plate 4 and the second reaction plate 5. One end of the screw 6 is provided with a first locking nut 7 located outside the first reaction plate 4, and the other end is provided with two second locking nuts 8 located on both sides of the second reaction plate. The measurement and control device 3 is connected in series between the first locking nut 7 and the first reaction plate 4.

[0038] Furthermore, the first reaction plate 4 is composed of two symmetrical semicircular plates 401. The semicircular plate 401 has a semicircular hole 402 in the middle of its straight edge. After the two semicircular plates 401 are closed, the two semicircular holes 402 form a circular hole 403. The sling 1 is located in the circular hole 403. The two semicircular plates 401 are locked together by anchor bolts 9. The second reaction plate 5 is composed of two symmetrical rectangular plates 501. After the two rectangular plates 501 are closed, they are clamped to the outer end of the ear plate 203 and locked together by anchor bolts 9.

[0039] Specifically, such as Figure 4 and Figure 5 As shown, the first reaction plate 4 is composed of two semicircular plates 401 arranged symmetrically on the left and right sides. A semicircular hole 402 is provided in the middle of the straight edge of each semicircular plate 401. When the two first reaction plates 4 are closed, a circular hole 403 is formed in the middle, allowing the sling 1 to pass through. The two semicircular plates 401 directly clamp the sling 1 and are then locked by anchor bolts 9 at the upper and lower ends. The right side of the first reaction plate 4 contacts the left end of the cable head 201. Figure 3 As shown, the second reaction plate 5 is composed of two vertically symmetrical rectangular plates 501. After the two rectangular plates 501 are closed, they are locked to the right end of the ear plate 203 by anchor bolts 9. Two parallel screws 6 are inserted between the first reaction plate 4 and the second reaction plate 5. The two screws 6 are located on both sides of the sling 1 and are parallel to the axis of the sling 1. The measuring and control device 3 is connected in series to the left end of the connecting screw 202 and is located on the left side of the first reaction plate 4. The first locking nut 7 is threaded to the left end of the connecting screw 202 to prevent the measuring and control device 3 from slipping out. Two second locking nuts 8, located on both sides of the second reaction plate 5 respectively, are threaded to the right end of the connecting screw 202 to achieve the fixed installation of the entire reaction support.

[0040] Furthermore, the measurement and control device 3 includes a first top plate 12 and a first bottom plate 13 sleeved on the sling 1. The first top plate 12 and the first bottom plate 13 form an annular basin 17. A suitable force-measuring elastic body 14 is provided in the basin 17. A first pressure sensor 10 is provided on the side wall of the basin 17. The working end of the first pressure sensor 10 passes through the side wall of the basin 17 and contacts the side wall of the force-measuring elastic body 14. A guide plate 15 is provided on the side of the force-measuring elastic body 14 adjacent to the first reaction plate 4. A hydraulic chamber 16 is formed between the guide plate 15 and the inner wall of the basin 17. An oil injection channel connected to the hydraulic chamber 16 is provided on the side wall of the basin 17. A sealing bolt 11 is provided at the inlet end of the oil injection channel.

[0041] Specifically, such as Figure 6 and Figure 7 As shown, the measurement and control device 3 has a hydraulic basin 17 structure. The device includes a first top plate 12 and a first bottom plate 13. Both the top plate 12 and the bottom plate 13 have through holes in their middle sections to allow the connecting screw 202 to pass through. The top plate 12 and the bottom plate 13 form a concave-convex fit structure, resulting in an annular basin 17. A sealing ring is provided between the bottom plate 13 and the top plate 12. A force-measuring elastic body 14 is provided inside the basin 17. An annular guide plate 15 is provided at the right end of the force-measuring elastic body 14. The force-measuring elastic body 14 is also annular, and sealing rings are provided on both its inner and outer walls. The guide plate 15 and the right side wall of the basin 17 form an annular hydraulic... The hydraulic chamber 16 is provided, and an oil injection channel (not shown in the figure) is provided on the outer wall of the basin 17 to communicate with the hydraulic chamber 16. The inlet end of the oil injection channel is provided with a suitable sealing bolt 11. At the same time, a first pressure sensor 10 is provided on the outer wall of the basin 17. The first pressure sensor 10 senses the deformation of the side wall of the force measuring elastic body 14 to detect the force on the measuring and control device 3 along the axis of the sling 1. By injecting hydraulic oil into the hydraulic chamber 16, the height of the measuring and control device 3 along the axis of the sling 1 can be changed. The first locking nut 7 on the left side limits the first top plate 12. The force generated by the hydraulic pressure will act on the first reaction plate 4 through the first bottom plate 13 and then be transmitted to the connecting screw 202.

[0042] The detection principle of the measuring and control device 3 is as follows: Unscrew the sealing bolt 11 and inject hydraulic oil into the oil pressure chamber 16 through the oil injection channel. The travel of the measuring and control device 3 along the axis of the sling 1 increases, and it gradually begins to bear load. The tension on the connecting screw 202 gradually decreases. The load measured by the force measuring body at this stage is the sum of the tension on the connecting screw 202 and the force on the reaction support. Continue injecting hydraulic oil, and the travel of the measuring and control device 3 continues to increase until the thread clearance of the connecting screw 202 changes from the right to the left. At this stage, the connecting screw 202 gradually transitions from a tensile state to a compressive state. During this process, the resultant force and time curves show a smooth transition. In this stage, the load measured by the first pressure sensor 10 of the control device 3 is: the force on the reaction support, the force on the connecting screw 202 is zero, and the tension on the sling 1 is the resultant force detected by the control device 3, which is the force on the reaction support. As hydraulic oil continues to be injected, the stroke of the control device 3 continues to increase, the connecting screw 202 begins to be compressed, and the pressure gradually increases. In this stage, the load measured by the first pressure sensor 10 is: the difference between the pressure on the connecting screw 202 and the force on the reaction support.

[0043] Furthermore, the measurement and control device 3 includes a second top plate 18 and a second bottom plate 19 sleeved on the sling 1. An adjustment cavity is formed between the second top plate 18 and the second bottom plate 19. Two adjustment blocks 20 are symmetrically distributed in the adjustment cavity about the axis of the sling 1. The adjustment blocks 20 are in oblique straight contact with the side wall of the second top plate 18 and in straight contact with the side wall of the second bottom plate 19. A second pressure sensor 21 is provided between the two adjustment blocks 20.

[0044] Specifically, such as Figure 8 As shown, the measuring and control device 3 is a wedge-shaped height adjustment measuring and control device 3. The relative movement of the two adjusting blocks 20 can change the distance between the second top plate 18 and the second bottom plate 19, thereby changing the travel of the measuring and control device 3 along the axis of the sling 1. The force detected by the second pressure sensor 21 can be converted by the adjusting block 20 to obtain the force on the measuring and control device 3 along the axis of the sling 1.

[0045] The detection principle of the measuring and control device 3 is as follows: The hydraulic jack increases the distance between the two adjusting blocks 20, increasing the stroke of the measuring and control device 3 along the axis of the sling 1 and gradually introducing load. The tension on the connecting screw 202 gradually decreases. The load detected at this stage is the sum of the tension on the connecting screw 202 and the force on the reaction support. As the two adjusting blocks 20 continue to move away from each other, the stroke of the measuring and control device 3 continues to increase until the thread clearance of the connecting screw 202 changes from the right to the left. At this stage, the connecting screw 202 gradually transitions from a tensile state to a compressive state. During the process, the resultant force and time curves detected show a smooth transition period. During this stage, the load measured by the second pressure sensor 21 of the measurement and control device 3 is: the force on the reaction support, the force on the connecting screw 202 is zero, and the tension on the sling 1 is the resultant force detected by the measurement and control device 3, which is the force on the reaction support. As the distance between the two adjusting blocks 20 continues to increase, the stroke of the measurement and control device 3 continues to increase, and the connecting screw 202 begins to be compressed, and the pressure gradually increases. During this stage, the load measured by the second pressure sensor 21 is: the difference between the pressure on the connecting screw 202 and the force on the reaction support.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for in-situ calibration of internal forces in intelligent cables / rods, characterized in that, Includes the following steps: S1: Install a counter-energy adjustment stroke or a counter-force support for adjusting the stroke and monitoring the internal force on the outside of the anchorage section (2) of the cable / rod bearing; S2: Apply power to slowly adjust the stroke of the reaction support along the cable / rod direction, so that the reaction support gradually bears the load; S3: After the reaction support bears the load, continue to apply power to slowly adjust the stroke of the reaction support along the cable / rod direction, and collect the resultant force of the reaction support in real time; S4: Based on the mechanical balance relationship between the axial force of the cable / rod, the force of the anchorage section (2) and the resultant force of the reaction support, the force value of the resultant force of the reaction support and the smooth transition section in the time curve is obtained, which is the actual force of the cable / rod under the current state. This actual force is the standard value of the actual force of the cable / rod before calibration. This standard value of the actual force is used to calibrate the monitoring value.

2. The in-situ calibration method for internal forces of intelligent cables / rods according to claim 1, characterized in that, The reaction support includes a reaction frame and a measurement and control device (3) connected to the end of the reaction frame. The reaction frame and / or the measurement and control device (3) can adjust the stroke or adjust the stroke and monitor the internal force. Apply power to slowly adjust the stroke of the reaction support, so that the reaction support gradually bears the load. After the reaction support bears the load, continue to apply power to slowly adjust the stroke of the reaction support along the cable / rod axis. Collect the resultant force data along the cable / rod axis in real time and obtain the resultant force versus time curve. Based on the resultant force versus time curve, obtain the standard value of the resultant force when it is in a smooth transition period. Obtain the tension of the cable / rod as the calculated force value during this period based on the mechanical principle and balance relationship. Then, based on the mechanical balance relationship of the cable / rod force, the anchorage section (2) force, and the reaction support force when the resultant force is constant or changes smoothly, realize the actual force standard value of each point to calibrate the corresponding monitoring value.

3. The in-situ calibration method for internal forces of intelligent cables / rods according to claim 1, characterized in that, The tension on the cable / rod is equal to the sum of the force on the reaction support and the tension on the anchorage section (2); when the reaction support is initially installed, the force is zero, and the tension on the cable / rod is equal to the tension on the anchorage section (2); after the stroke of the control device (3) increases and it bears the load until the monitored resultant force remains unchanged or relatively stable, the force on the anchorage section (2) is zero. At this time, the tension on the cable / rod is completely balanced by the reaction support; after the stroke of the control device (3) continues to increase, the tension on the cable / rod is equal to the difference between the force on the reaction support and the pressure on the anchorage section (2).

4. The in-situ calibration method for internal forces of intelligent cables / rods according to claim 1, characterized in that, The reaction support consists of a first reaction plate (4), a second reaction plate (5), and a screw (6). First, the first reaction plate (4) is installed on one side of the anchoring section (2), and then the second reaction plate (5) is installed on the other side of the anchoring section (2). The first reaction plate (4) is sleeved on the cable / rod, and then the first reaction plate (4) and the second reaction plate (5) are connected by two screws (6). The measurement and control device (3) is connected in series on the screw (6) outside the first reaction plate (4).

5. The in-situ calibration method for internal forces of intelligent cable / rod according to claim 4, characterized in that, Install a first nut on the screw (6) located outside the measuring and control device (3). The first nut restricts the displacement of the measuring and control device (3) on one side. Install a second nut on the screw (6) located on both sides of the second reaction plate (5). Apply power to the measuring and control device (3) to change its stroke along the cable / rod axis. The measuring and control device (3) acts on the first reaction plate (4) in the opposite direction of the cable / rod force and begins to gradually receive force until the resultant force collected by the measuring and control device (3) remains unchanged or relatively stable within a certain period of time, and then stop applying power.

6. An intelligent cable / rod internal force in-situ calibration device, based on the intelligent cable / rod internal force in-situ calibration method according to any one of claims 1-5, characterized in that, It includes a reaction support installed on the outside of the anchoring section (2) of the sling (1) and a measuring and control device (3) connected in series at the end of the reaction support, which can adjust the stroke or monitor the internal force and adjust the stroke. The measuring and control device (3) is a hydraulic basin structure, a wedge block structure or a jack. After the stroke of the measuring and control device (3) changes along the cable / rod axis, it acts on the reaction support in the opposite direction of the cable / rod force to gradually bear the load.

7. The intelligent cable / rod internal force in-situ calibration device according to claim 6, characterized in that, The anchoring section (2) includes a cable head (201), a connecting screw (202), and an ear plate (203). One end of the cable head (201) is connected to the sling (1), and the other end is threaded to the connecting screw (202). The end of the connecting screw (202) away from the sling (1) is threaded to the ear plate (203). The end of the ear plate (203) away from the sling (1) is connected to the building. The reaction support includes a first reaction plate (4), a second reaction plate (5), and a screw (6). The first reaction plate... (4) The second reaction plate (5) is set on the outside of the cable head (201) and is sleeved on the cable (1). The screw (6) passes through the first reaction plate (4) and the second reaction plate (5). One end of the screw (6) is provided with a first locking nut (7) located outside the first reaction plate (4), and the other end is provided with two second locking nuts (8) located on both sides of the second reaction plate (5). The measurement and control device (3) is connected in series between the first locking nut (7) and the first reaction plate (4).

8. The intelligent cable / rod internal force in-situ calibration device according to claim 7, characterized in that, The measuring and control device (3) includes a first top plate (12) and a first bottom plate (13) sleeved on the sling (1). The first top plate (12) and the first bottom plate (13) form an annular basin (17). A suitable force measuring elastomer (14) is provided in the basin (17). A first pressure sensor (10) is provided on the side wall of the basin (17). The working end of the first pressure sensor (10) passes through the side wall of the basin (17) and contacts the side wall of the force measuring elastomer (14). A guide plate (15) is provided on the side of the force measuring elastomer (14) adjacent to the first reaction plate (4). A hydraulic chamber (16) is formed between the guide plate (15) and the inner wall of the basin (17). An oil injection channel connected to the hydraulic chamber (16) is provided on the side wall of the basin (17). A sealing bolt (11) is provided at the inlet end of the oil injection channel.

9. The intelligent cable / rod internal force in-situ calibration device according to claim 7, characterized in that, The measurement and control device (3) includes a second top plate (18) and a second bottom plate (19) sleeved on the sling (1). An adjustment cavity is formed between the second top plate (18) and the second bottom plate (19). Two adjustment blocks (20) are symmetrically distributed in the adjustment cavity with the axis of the sling (1) as the axis. The adjustment blocks (20) are in oblique straight contact with the side wall of the second top plate (18) and in straight contact with the side wall of the second bottom plate (19). A second pressure sensor (21) is provided between the two adjustment blocks (20).

10. The intelligent cable / rod internal force in-situ calibration device according to claim 7, characterized in that, The first reaction plate (4) is composed of two symmetrical semicircular plates (401). The semicircular plate (401) has a semicircular hole (402) in the middle of its straight edge. After the two semicircular plates (401) are closed, the two semicircular holes (402) form a circular hole (403). The sling (1) is located in the circular hole (403). The two semicircular plates (401) are locked together by anchor bolts (9). The second reaction plate (5) is composed of two symmetrical rectangular plates (501). After the two rectangular plates (501) are closed, they are clamped to the outer end of the ear plate (203) and locked together by anchor bolts (9).

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