Dispersing type intelligent force measuring support and jacking-free replacement method for load-bearing sensor

Abstract

The invention discloses a dispersed intelligent force measuring support and a jacking-free replacement method for a load-bearing sensor, and the method comprises the following steps: S1, installing a temporary support on the side surface of the intelligent force measuring support, and carrying out the adjustment to enable the top surface of the support to be closely attached to a structure; s2, the limiting of the limiting mechanism on the adjusting mechanism is relieved, the height of the intelligent force measuring support is automatically and gradually reduced under the action of the upper load until the temporary support is borne, and the intelligent force measuring support and the internal sensor are unloaded; s3, taking out the to-be-replaced and / or to-be-calibrated sensor, and installing a new and / or calibrated sensor; s4, the adjusting mechanism is changed to the initial position, the adjusting mechanism drives the intelligent force measuring support to the original height, the intelligent force measuring support bears, and the temporary support is unloaded; and S5, the limiting mechanism is fixed, the temporary support is taken out, and replacement and / or calibration of the sensor are / is completed. According to the invention, the stress uniformity of each area in the plane of the support can be directly monitored, and the replacement of the sensor can be realized without jacking the beam body.

Description

Technical Field

[0001] This invention relates to the field of force measurement technology for engineering structure supports, specifically to a distributed intelligent force measurement support and a method for replacing load-bearing sensors without jacking up. Background Technology

[0002] As the main force-transmitting components directly connecting the superstructure and substructure, the changes in the forces acting on the supports can largely reflect the overall operational status of the structure. Collecting vertical reaction force monitoring data from the supports can provide a technical basis for structural health monitoring. With the increasing construction of infrastructure such as transportation and buildings in my country, monitoring the static and dynamic vertical loads on supports is of significant practical importance for structural operation.

[0003] Traditional force-measuring supports measure a total vertical reaction force, making it difficult to monitor the uniformity of force distribution in different areas within the support plane. This means that even if current monitoring technology indicates that the overall force distribution of the support is reasonable, it is still difficult to guarantee whether the force distribution in different areas within the support is uniform. Furthermore, force-measuring supports require sensing elements to measure the magnitude of the force. However, under long-term operating conditions, these sensing elements are prone to aging and damage, requiring manual replacement. Currently, the sensing elements are installed inside the force-measuring device. Due to the limited internal space, the upper beam must be lifted to a certain height to replace the sensor, resulting in inconvenience and low replacement efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a distributed intelligent force measuring support and a method for replacing load-bearing sensors without jacking up, which can directly monitor the uniformity of force in each area within the plane of the support, and at the same time, the sensor can be replaced without jacking up the beam.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution: A method for replacing a load cell without lifting it includes the following steps: S1: Install temporary supports on the side of the intelligent force-measuring support; adjust to ensure that the top surface of the support is in close contact with the structure; S2: Release the limit mechanism from the adjustment mechanism. Under the action of the upper load, the height of the intelligent force measuring support will automatically and gradually decrease until the temporary support bears the load. The intelligent force measuring support and the internal sensor will be unloaded. S3: Remove the sensor to be replaced and / or calibrated, and install the new and / or calibrated sensor; S4: Change the adjustment mechanism to the initial position. The adjustment mechanism drives the intelligent force measuring support to the original height. The intelligent force measuring support bears the load, and the temporary support is unloaded. S5: Fix the limiting mechanism, remove the temporary support, and complete the sensor replacement and / or calibration.

[0006] In this solution, when the sensor needs to be replaced or calibrated, temporary supports are first arranged around the support. Then, the limiting mechanism is released from the restriction on the adjustment mechanism. The support is allowed to fall to its height under the action of the upper load, allowing the temporary supports to take over the load. The support is unloaded so that the sensor can be replaced. The sensor replacement process does not require lifting the beam and will not change the stress distribution of the beam, ensuring the safety of the beam when replacing the force measuring element. The sensor replacement is simple, quick and efficient.

[0007] Optionally, the limiting mechanism restricts the displacement of the adjusting mechanism, thereby limiting the height of the intelligent force measuring support.

[0008] Optionally, the temporary support is a jack, and at least two temporary supports are arranged around the intelligent force measuring support.

[0009] A distributed intelligent force-measuring support includes a support body, an adjustment mechanism for adjusting the height of the support, and a limiting mechanism for limiting the displacement of the adjustment mechanism. Multiple sensors for monitoring the force on the support body in different areas of the plane are distributed between the adjustment mechanism and the support body.

[0010] Optionally, the support body is positioned above the adjustment mechanism, and multiple sensors are distributed between the support body and the adjustment mechanism.

[0011] Optionally, the adjustment mechanism includes a base plate, a top plate, and adjustment blocks. Multiple sensors are distributed between the top surface of the top plate and the bottom surface of the support body. The adjustment blocks are symmetrically distributed between the bottom surface of the top plate and the top surface of the base plate. The top surface of the adjustment block and the bottom surface of the top plate are in oblique-straight-plane contact, and the bottom surface of the adjustment block and the top surface of the base plate are in flat-straight-plane contact. The limiting mechanism is located between the two adjustment blocks.

[0012] Optionally, the top surface of the top plate has a basin, the lower end of the support body is located in the basin, and the side wall of the basin is provided with an assembly channel for loading and unloading sensors, the assembly channel being distributed in a cross shape.

[0013] Optionally, the sensor is a load-bearing sensor, and at least three sensors are provided, evenly distributed within the pelvic cavity.

[0014] Optionally, the limiting mechanism includes a first wedge and a second wedge. The surfaces of the first and second wedges are in oblique contact. The first wedge is in flat contact with the left adjustment block, and the second wedge is in flat contact with the right adjustment block. The ends of the first and second wedges are provided with fixing plates, which are bolted to the bottom plate and the top plate.

[0015] Optionally, the length of the first wedge is greater than the length of the second wedge, and the small end of the first wedge extends to the outside of the support body.

[0016] The beneficial effects of this invention are as follows: 1. In this invention, when the sensor needs to be replaced or calibrated, a temporary support is first arranged around the support, and then the limitation mechanism on the adjustment mechanism is released. The support is allowed to fall to its height under the action of the upper load, allowing the temporary support to take over the load. The support is unloaded so that the sensor can be replaced. The sensor replacement process does not require lifting the beam and will not change the force distribution of the beam, ensuring the safety of the beam when replacing the force measuring element. The sensor replacement is simple and quick, and the replacement efficiency is higher.

[0017] 2. This scheme uses multiple force sensors to directly measure force, which is a direct measurement method. The testing accuracy is directly related to the sensors. The resultant force of all sensors is the vertical force on the support, and the force on each sensor reflects the uniformity of the force on the support in the plane. Compared with traditional force-measuring supports, such as those that measure strain or wavelength by arranging force-measuring bodies, or those that use wedge-shaped surfaces for conversion, which are all indirect force-measuring methods, even if the sensor data is accurate, it is still necessary to ensure that the conversion relationship between the vertical force on the support and the sensor readings is accurate, which involves many influencing factors. This innovative scheme avoids the influence of these factors, and the force measurement principle is clear and simple. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the method flow of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the half-section structure of the present invention; Figure 4 This is a diagram showing the distribution of sensors on the top plate.

[0019] Reference numerals: 1-Support body, 2-Sensor, 3-Top plate, 4-Adjusting block, 5-Bottom plate, 6-Limiting mechanism, 7-Pelvis, 8-Control system, 9-Fixing plate, 10-First wedge strip, 11-Second wedge strip, 12-Assembly channel. 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.

[0023] Example 1 A method for replacing a load cell without lifting it includes the following steps: S1: Install temporary supports on the side of the intelligent force-measuring support; adjust to ensure that the top surface of the support is in close contact with the structure; S2: Release the limit mechanism 6 from the adjustment mechanism. Under the action of the upper load, the height of the intelligent force measuring support will automatically and gradually decrease until the temporary support bears the load. The intelligent force measuring support and the internal sensor 2 will be unloaded. S3: Remove the sensor 2 to be replaced and / or calibrated, and install the new and / or calibrated sensor 2; S4: Change the adjustment mechanism to the initial position. The adjustment mechanism drives the intelligent force measuring support to the original height. The intelligent force measuring support bears the load, and the temporary support is unloaded. S5: Fix the limiting mechanism 6, remove the temporary support, and complete the replacement and / or calibration of sensor 2.

[0024] Furthermore, the limiting mechanism 6 restricts the displacement of the adjusting mechanism, thereby limiting the height of the intelligent force measuring support.

[0025] Furthermore, the temporary support is a jack, and at least two temporary supports are arranged circumferentially around the intelligent force measuring support.

[0026] In this embodiment, as Figure 1As shown, when sensor 2 needs to be replaced or calibrated, temporary supports (not shown in the figure) are first arranged around the support. These supports can be arranged symmetrically on both sides of the support or in a cross shape to ensure even stress distribution later. The temporary supports are jacks, and their top surfaces are in close contact with the bottom surface of the superstructure (beam). Then, the limiting mechanism 6 is released from its restriction on the adjustment mechanism, and the support gradually decreases in height under the upper load, achieving self-fall. After the support height decreases, the temporary supports take over the load, thus unloading the support. After the force system conversion is completed, the sensor to be replaced and / or calibrated can be retrieved along the designated channel. Device 2, reinstall the new sensor 2 and / or the calibrated sensor 2. After the sensor 2 is installed, adjust the position of the limiting mechanism 6 and change the position of the adjusting mechanism to the initial state. This causes the adjusting mechanism to gradually increase the height of the support until it returns to the initial state. At this time, the temporary support is unloaded, and the support is loaded again. Then, fix the limiting mechanism and finally remove the temporary support to complete the replacement and / or calibration of sensor 2. The entire sensor 2 replacement process does not require lifting the beam and will not change the force distribution of the beam, ensuring the safety of the beam when replacing the force measuring element. The replacement of sensor 2 is simple, quick, and more efficient.

[0027] Example 2 A distributed intelligent force measuring support includes a support body 1, an adjustment mechanism for adjusting the height of the support, and a limiting mechanism 6 for limiting the displacement of the adjustment mechanism. Multiple sensors 2 are distributed between the adjustment mechanism and the support body 1 to monitor the force on the support body 1 in different areas of the plane.

[0028] In this embodiment, the support body 1 can be a pot bearing, a spherical bearing, a hyperboloid vibration isolation bearing, a friction pendulum bearing, or a rubber bearing. Multiple sensors 2 are used to achieve regional force sensing within the plane of the support, which can accurately obtain the pressure distribution data (such as pressure value and coordinates of the point of application) of each area within the plane of the support body 1. Compared with the traditional single-point force measuring device that measures a total vertical force, the mechanical data dimension of this solution is improved. It can monitor whether the force in each area within the plane of the support is uniform. The sum of the force data measured by each sensor 2 is the overall force of the support, while the individual data of each sensor 2 reflects the force situation in different areas. It can monitor both the overall force situation and the force situation in individual areas. The adjustment mechanism is linked with the sensors 2 and can automatically adjust the support height based on real-time force data to achieve dynamic balance. The failure of a single sensor 2 does not affect the overall monitoring, and the system can still maintain its functional integrity.

[0029] Furthermore, the support body 1 is positioned above the adjustment mechanism, and multiple sensors 2 are distributed between the support body 1 and the adjustment mechanism.

[0030] Specifically, multiple sensors 2 can communicate with an external control system 8, which can provide real-time mechanical data to the control system 8 so that the control system 8 can analyze the stress on each area of ​​the support body 1 and determine the uniformity of stress in each area within the support plane, thereby evaluating the overall state of the support and the beam. Based on the evaluation results, the control adjustment mechanism can then automatically adjust the height of the support body 1.

[0031] Furthermore, the adjustment mechanism includes a base plate 5, a top plate 3, and adjustment blocks 4. Multiple sensors 2 are distributed between the top surface of the top plate 3 and the bottom surface of the support body 1. The adjustment blocks 4 are symmetrically distributed between the bottom surface of the top plate 3 and the top surface of the base plate 5. The top surface of the adjustment block 4 and the bottom surface of the top plate 3 are in oblique straight-plane contact, and the bottom surface of the adjustment block 4 and the top surface of the base plate 5 are in flat straight-plane contact. The limiting mechanism 6 is located between the two adjustment blocks 4.

[0032] Specifically, such as Figure 2 As shown, sensor 2 is pressed between the bottom surface of the support body 1 and the top surface of the top plate 3, which can accurately measure the vertical force in each area of ​​the plane of the support body 1. The top plate 3 and the bottom surface form an adjustment cavity. Two wedge-shaped adjustment blocks 4 are symmetrically distributed in the adjustment cavity. The adjustment blocks 4 have oblique straight contact with the bottom surface of the top plate 3 and flat contact with the top surface of the bottom plate 5. The top surfaces of the two adjustment blocks 4 together form an inverted V-shaped surface. When the two adjustment blocks 4 are relatively close, the height of the top plate 3 increases, and vice versa. The change in the height of the top plate 3 causes the height of the support body 1 to change. The limiting mechanism 6 is set between the opposite end faces of the two adjustment blocks 4 to limit the two adjustment blocks 4 from getting relatively close after the height adjustment is completed, so as to ensure the stability after the height adjustment. The top and bottom surfaces of the adjustment blocks 4 are provided with wear-resistant polytetrafluoroethylene plates, which extend the service life of the adjustment blocks 4 and reduce the friction coefficient of the sliding of the adjustment blocks 4, making the height change of the top plate 3 more flexible.

[0033] Furthermore, the top surface of the top plate 3 has a basin 7, the lower end of the support body 1 is located in the basin 7, and the side wall of the basin 7 is provided with an assembly channel 12 for loading and unloading the sensor 2. The assembly channel 12 is distributed in a cross shape.

[0034] Specifically, a basin 7 is located on the top surface of the top plate 3. The lower part of the support body 1 is located inside the basin 7, and the sensor 2 is also located inside the basin 7. The basin 7 can limit the support body in the horizontal plane, preventing the support body 1 from detaching from the top plate 3 and causing a beam fall accident. At the same time, an assembly channel 12 is provided in a cross shape on the side wall of the basin 7. The assembly channel 12 is connected to the basin 7, and three sensors 2 are located between the relatively distributed assembly channels 12. The assembly channels 12 are channels for the later replacement of the sensors 2.

[0035] Furthermore, the sensor 2 is a load-bearing sensor 2, and there are at least three sensors 2, which are evenly distributed in the pelvic cavity 7.

[0036] Specifically, such as Figure 4 As shown, in this embodiment, sensor 2 is a load-bearing sensor. A total of five sensors 2 are arranged on the bottom surface of the support body 1. One sensor is set in the middle position, and the other four are distributed in a cross shape around the middle sensor 2. In this way, the five sensors 2 can monitor the force on the middle part of the support body 1 and the force on the four surrounding areas. Then, based on the force data of the five areas, the uniformity of the force on the support body 1 in the plane is determined. The sum of the forces on the five sensors 2 is the magnitude of the vertical force borne by the support body 1.

[0037] Furthermore, the limiting mechanism 6 includes a first wedge 10 and a second wedge 11. The surfaces of the first wedge 10 and the second wedge 11 that face each other are in oblique contact. The first wedge 10 is in flat contact with the left adjustment block 4, and the second wedge 11 is in flat contact with the right adjustment block 4. The ends of the first wedge 10 and the second wedge 11 are provided with fixing plates 9, and the fixing plates 9 are bolted to the bottom plate 5 and the top plate 3.

[0038] Furthermore, the length of the first wedge 10 is greater than the length of the second wedge 11, and the small end of the first wedge 10 extends to the outside of the support body 1.

[0039] Specifically, such as Figure 2 and Figure 3 As shown, the limiting mechanism 6 consists of two wedge-shaped bars, namely the first wedge 10 and the second wedge 11. The first wedge 10 is located on the left side, and the second wedge 11 is located on the right side. The opposing surfaces of the two wedge bars are in oblique contact. The left side of the first wedge 10 is in flat contact with an adjusting block 4, and the right side of the second wedge 11 is in flat contact with another adjusting block 4. The relative sliding of the two wedge bars can restore or release the limiting effect on the two adjusting blocks 4. When there is no need to replace the sensor 2, the two wedge bars are connected to the bottom plate 5 and the top plate 3 through the fixing plate 9. In this way, under the action of the upper load, the two wedge bars will not move relative to each other, and thus the two adjusting blocks 4 will not move relative to each other, so that the height of the support body 1 will not change.

[0040] The length of the first wedge 10 is greater than the length of the second wedge 11. The small end of the first wedge 10 is located outside the support body 1. When the two wedges slide relative to each other, there can be a long sliding slope between the first wedge 10 and the second wedge 11. When the sensor 2 needs to be replaced, the bolts between the fixing plate 9 and the bottom plate 5 and the top plate 3 can be removed. Under the action of the upper load, the first wedge 10 and the second wedge 11 slide relative to each other along their length direction. The first wedge 10 and the second wedge 11 move outward relative to each other. At this time, the limit on the two adjusting blocks 4 is released. The two adjusting blocks 4 move closer to each other under the action of the upper load, and the height of the support body 1 gradually decreases. It can fall by itself without power until the temporary supports on both sides of the support body 1 bear the load.

[0041] The specific replacement method for sensor 2 of the present invention is as follows: When sensor 2 needs to be replaced or calibrated, temporary supports are first arranged around the support. Then, the bolts between the fixing plate 9 and the bottom plate 5, the top plate 3, and the top plate 3 and the bottom plate 5 are removed. At this time, the limiting effect of the first wedge strip 10 and the second wedge strip 11 on the two adjusting blocks 4 is released. Under the action of the upper load (mainly the gravity of the beam), the first wedge strip 10 and the second wedge strip 11 slide outward relative to each other, causing the two adjusting blocks 4 to move closer to each other. This causes the height of the support body 1 to gradually decrease under the action of the upper load, achieving self-fall. After the support height decreases, the temporary supports take over the load. At this time, the support is unloaded. After the force system conversion is completed, the sensor 2 to be replaced and / or calibrated can be taken out along the assembly channel 12. After installing the new sensor 2 and / or the calibrated sensor 2, adjust the positions of the first wedge strip 10 and the second wedge strip 11 so that they slide inward relative to each other, thereby causing the two adjusting blocks 4 to move away from each other. This gradually increases the height of the support until it returns to its initial state. Then, reconnect the fixing plate 9 to the base plate 5 and the top plate 3 with bolts. Tighten the bolts between the base plate 5 and the top plate 3. At this time, the temporary support is unloaded, and the support is loaded again. Finally, remove the temporary support to complete the replacement and / or calibration of the sensor 2. The entire sensor 2 replacement process does not require lifting the beam and does not change the stress distribution of the beam, ensuring the safety of the beam when replacing the force measuring element. The replacement of the sensor 2 is simple, quick, and more efficient.

[0042] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for replacing a load-bearing sensor without lifting, characterized in that, The following steps are involved: S1: Install temporary supports on the side of the intelligent force measuring support and adjust them to ensure that the top surface of the support is in close contact with the structure; S2: Release the limit mechanism (6) from the adjustment mechanism. Under the action of the upper load, the height of the intelligent force measuring support will automatically and gradually decrease until the temporary support bears the load. The intelligent force measuring support and the internal sensor (2) will be unloaded. S3: Remove the sensor (2) to be replaced and / or calibrated, and install the new and / or calibrated sensor (2). S4: Change the adjustment mechanism to the initial position. The adjustment mechanism drives the intelligent force measuring support to the original height. The intelligent force measuring support bears the load, and the temporary support is unloaded. S5: Fix the limiting mechanism (6), remove the temporary support, and complete the replacement and / or calibration of the sensor (2).

2. The method for replacing a load-bearing sensor without lifting, as described in claim 1, is characterized in that... The limiting mechanism (6) restricts the displacement of the adjusting mechanism, thereby limiting the height of the intelligent force measuring support.

3. The method for replacing a load-bearing sensor without lifting, as described in claim 1, is characterized in that... The temporary support is a jack, and at least two temporary supports are installed around the intelligent force measuring support.

4. A distributed intelligent force-measuring support for a load-bearing sensor replacement method without jacking, as described in any one of claims 1-3, characterized in that, It includes a support body (1), an adjustment mechanism for adjusting the height of the support, and a limiting mechanism (6) for limiting the displacement of the adjustment mechanism. Multiple sensors (2) for monitoring the force on the support body (1) in different areas of the plane are distributed between the adjustment mechanism and the support body (1).

5. A distributed intelligent force-measuring support according to claim 4, characterized in that, The support body (1) is positioned above the adjustment mechanism, and multiple sensors (2) are distributed between the support body (1) and the adjustment mechanism.

6. A distributed intelligent force-measuring support according to claim 4, characterized in that, The adjustment mechanism includes a base plate (5), a top plate (3), and adjustment blocks (4). Multiple sensors (2) are distributed between the top surface of the top plate (3) and the bottom surface of the support body (1). The adjustment blocks (4) are symmetrically distributed between the bottom surface of the top plate (3) and the top surface of the base plate (5). The top surface of the adjustment block (4) and the bottom surface of the top plate (3) are in oblique straight-plane contact, and the bottom surface of the adjustment block (4) and the top surface of the base plate (5) are in flat straight-plane contact. The limiting mechanism (6) is located between the two adjustment blocks (4).

7. A distributed intelligent force-measuring support according to claim 6, characterized in that, The limiting mechanism (6) includes a first wedge (10) and a second wedge (11). The surfaces of the first wedge (10) and the second wedge (11) are in oblique contact. The first wedge (10) is in flat contact with the left adjustment block (4), and the second wedge (11) is in flat contact with the right adjustment block (4). The ends of the first wedge (10) and the second wedge (11) are provided with fixing plates (9). The fixing plates (9) are bolted to the bottom plate (5) and the top plate (3).

8. A distributed intelligent force-measuring support according to claim 6, characterized in that, The top surface of the top plate (3) has a basin (7), and the lower end of the support body (1) is located inside the basin (7). The side wall of the basin (7) is provided with an assembly channel (12) for loading and unloading the sensor (2), and the assembly channel (12) is distributed in a cross shape.

9. A distributed intelligent force-measuring support according to claim 4, characterized in that, The sensor (2) is a load-bearing sensor, and there are at least three sensors (2) evenly distributed in the pelvic cavity (7).

10. A distributed intelligent force-measuring support according to claim 7, characterized in that, The length of the first wedge (10) is greater than the length of the second wedge (11), and the small end of the first wedge (10) extends to the outside of the support body (1).

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