A method for replacing an operating period force measuring support sensor and a method for calibrating an operating period force measuring support

Abstract

This invention discloses a method for replacing a force-measuring support sensor during operation and a method for calibrating a force-measuring support during operation, relating to the field of rail transit engineering technology. The method for replacing the force-measuring support sensor during operation involves changing the force between the force-measuring probe and the sensor to replace the sensor, thus ensuring the inheritance of data before and after sensor replacement. The method for calibrating the force-measuring support during operation involves applying a known force load to the force-measuring probe, changing the force between the probe and the sensor, and using the standard loading force value at the load point and the corresponding monitoring force value to calibrate the sensor. After calibration, the force-measuring support completely returns to its pre-calibration state, ensuring the accuracy and authenticity of the calibration results. The calibration process is simple and easy to operate, and does not affect the force-measuring accuracy of the force-measuring support itself.

Description

Technical Field

[0001] This invention relates to the field of rail transit engineering technology, specifically to a method for replacing force-measuring support sensors during operation and a method for calibrating force-measuring supports during operation. Background Technology

[0002] The main methods for replacing existing force-measuring support sensors are as follows:

[0003] 1. Add an inclined plane to reduce the resistance when the sensor constraint force is released;

[0004] 2. Remove the constraint structure of the sensor;

[0005] 3. Manually replace the sensor;

[0006] 4. For force-measuring supports that are not independent modules, the bridge must be lifted and the supports replaced.

[0007] The above methods for replacing sensors have the following problems:

[0008] 1. Replacing the sensor is complex, and the process involves continuous external force applied to the sensor, affecting its accuracy.

[0009] 2. The structure contradicts other core functions of the force-measuring support, thus failing to achieve the expected results;

[0010] 3. Data from before and after sensor replacement cannot be inherited;

[0011] 4. Operation needs to be interrupted and the entire force-measuring support needs to be replaced, and the cost of replacing the sensor is relatively high;

[0012] 5. The status of the sensor after replacement cannot be determined.

[0013] The existing calibration methods for force-measuring supports mainly include the following:

[0014] 1. By analyzing the relationship between the additional force and the actual load, and the monitored load value when the additional force is applied, the relationship between the actual load and the monitored value is obtained, thereby achieving the calibration of the vertical force.

[0015] 2. By applying an additional force to the force plate, adjust the position of the sensor until the additional force is the same as the monitored value, thus calibrating the sensor.

[0016] The above calibration method for force-measuring supports has the following problems:

[0017] 1. It is impossible to rule out the interference of other structures of the force measuring support on the calibration results during the calibration process;

[0018] 2. The expected results of force-measuring support calibration cannot be achieved;

[0019] 3. The calibration process for force measuring supports is complex. Summary of the Invention

[0020] (a) Technical problems to be solved

[0021] This invention provides a method for replacing force-measuring support sensors during operation, which solves the problems of data not being inherited before and after replacement and the high cost of replacing sensors in existing force-measuring support sensors. It also provides a calibration method for force-measuring support during operation, which solves the problems of inaccurate calibration results, complex calibration process, and impact on the accuracy of force measurement in existing force-measuring support calibration methods.

[0022] (II) Technical Solution

[0023] The technical solution for replacing the force-measuring support sensor during operation provided by this invention is as follows:

[0024] The force transmission path when the force measuring support measures force is as follows: the support load acts on the force measuring plate, the force measuring plate transmits the load to one end of the force measuring probe, and the other end of the force measuring probe contacts the sensor;

[0025] Includes the following steps:

[0026] S1: Apply a load to the force probe to unload the force between the force probe and the sensor until the monitored force value no longer changes, then stop applying the load to the force probe and fix the force probe.

[0027] S2: After removing the sensor, install the calibrated sensor;

[0028] S3: Unload the load acting on the force probe, and the force probe re-contacts the sensor until the monitored force value no longer changes.

[0029] During the sensor replacement process, the force between the force probe and the sensor is unloaded and restored after the sensor is installed, without affecting the force state between the force probe and the force plate. After the sensor is replaced, the monitoring data before the sensor replacement is completely and accurately inherited.

[0030] Replacing the sensors does not require lifting the bridge, dismantling the load-bearing supports, or disrupting bridge operations. The method for replacing the sensors is simple and easy to operate, greatly reducing the cost of replacing the sensors.

[0031] Preferably, in step S1, the load applied to the force probe does not exceed the range of the monitored force value before the sensor was replaced.

[0032] Preferably, the load is applied and unloaded at a uniform speed to the force probe.

[0033] Preferably, the position of the sensor remains fixed in steps S1 and S3.

[0034] Preferably, in step S2, when installing the sensor, the relative position of the sensor and the force probe is finely adjusted until the monitored force value drifts around zero until it stabilizes at 0, at which point the sensor installation is complete.

[0035] The technical solution for the calibration method of the force-measuring support during operation provided by this invention is as follows:

[0036] The force transmission path when the force measuring support measures force is as follows: the support load acts on the force measuring plate, the force measuring plate transmits the load to one end of the force measuring probe, and the other end of the force measuring probe contacts the sensor;

[0037] Includes the following steps:

[0038] S1: Determine the load range to be applied to the force probe;

[0039] S2: Apply a load uniformly to the force probe, move the force probe away from the sensor during the forward movement and move it closer to the sensor during the return movement, select several load recording points, and record the standard loading force value and the monitoring force value corresponding to each load point.

[0040] S3: The sensor calibration is formed based on the standard loading force value of each load point and the change value of the monitoring force value corresponding to each load point in step S2 above.

[0041] The process of the force probe moving away from the sensor during its forward movement and moving closer to the sensor during its return movement is a process of unloading and restoring the force between the force probe and the sensor. It does not affect the force state between the force plate and the force probe. The entire calibration process has no impact on the accuracy of the monitoring data. After calibration, the force support is completely restored to its state before calibration. There are no other interferences during the forward and return load processes of the force probe, ensuring the accuracy and authenticity of the force support calibration results.

[0042] Preferably, the position of the sensor remains fixed.

[0043] Preferably, in step S2, the load applied to the force probe does not exceed the load range determined in step S1.

[0044] Preferably, step S2 is repeated three times.

[0045] (III) Beneficial Effects

[0046] In summary, this invention provides a method for replacing force support sensors during operation. By unloading and restoring the force between the force probe and the sensor, the integrity and accuracy of the monitoring data before and after sensor replacement are ensured, without affecting the force state between the force probe and the force plate. The state of the sensor after replacement is confirmed by fine-tuning the relative position of the sensor and the force probe, further ensuring the integrity and accuracy of the monitoring data before and after sensor replacement, while greatly saving the cost of sensor replacement.

[0047] This invention provides a calibration method for a force-measuring support during operation. The calibration is achieved by moving the force-measuring probe away from the sensor during its forward movement and moving it closer to the sensor during its return movement. After calibration, the force-measuring support is completely restored to its state before calibration, and the calibration process is free from other interferences, ensuring the accuracy and authenticity of the force-measuring support calibration results. The calibration process is simple and easy to operate, and does not affect the force-measuring accuracy of the force-measuring support itself. Attached Figure Description

[0048] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram illustrating the steps of the method for replacing the force-measuring support sensor during the operation period, as provided in the embodiments of this application.

[0050] Figure 2 A schematic diagram illustrating the steps of the operational force-measuring support calibration method provided in this application embodiment. Detailed Implementation

[0051] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0052] Example of a method for replacing force-measuring support sensors during operation:

[0053] like Figure 1 As shown, a method for replacing the sensor of a force-measuring support during operation is described. The force transmission path when the force-measuring support measures force is as follows: the support load acts on the force-measuring plate, the force-measuring plate transmits the load to one end of the force-measuring probe, and the other end of the force-measuring probe contacts the sensor.

[0054] The sensor replacement method includes the following steps:

[0055] S1: Apply a load to the force probe to unload the force between the force probe and the sensor until the monitored force value no longer changes, then stop applying the load to the force probe and fix the force probe.

[0056] S2: After removing the sensor, install the calibrated sensor;

[0057] S3: Unload the load acting on the force probe, and the force probe re-engages with the sensor until the monitored force value no longer changes.

[0058] In step S1, the load applied to the force probe does not exceed the range of the monitored force value before the sensor was replaced.

[0059] In steps S1 and S3, the position of the sensor remains fixed.

[0060] In step S2, when installing the sensor, fine-tune the relative position of the sensor and the force probe until the monitored force value drifts around zero until it stabilizes at 0. At this point, the sensor installation is complete.

[0061] Apply and unload the load uniformly to the force probe.

[0062] By applying a load to the force probe to unload the force between the force probe and the sensor, the force value no longer changes, indicating that the sensor is not under force. The force between the force probe and the sensor has been completely unloaded, and there is no relative displacement between the force probe and the sensor, which does not affect the force state between the force probe and the force plate. At this point, stop applying the load to the force probe and fix the force probe to ensure that the force state between the force probe and the force plate remains stable. This also avoids the impact on the monitoring value when the sensor is replaced.

[0063] After installing the calibrated sensor, unload the load acting on the force probe, release the force probe, and the force probe will re-contact the sensor. If the monitored force value no longer changes, it means that the force probe has been completely released, and the force probe and sensor have returned to the state before the sensor was replaced.

[0064] The fixed position of the sensor ensures the accuracy of the monitored force value and avoids misjudging the degree of applied and unloaded load.

[0065] When installing the sensor, due to processing and instrument errors, the monitored value may not be exactly at zero after installation. By fine-tuning the relative position of the sensor and the force probe, the zero point is shifted left and right until it stabilizes at 0, indicating that the sensor has been installed correctly. At this point, the force probe is released. By adjusting the relative position of the sensor and the force probe instead of directly setting the monitored force value to zero, the monitoring data before the sensor was replaced is completely and accurately inherited.

[0066] Example 1 of the calibration method for the force-measuring bearing during the operation period:

[0067] As Figure 2 shown, a calibration method for the force-measuring bearing during the operation period. The force transmission path when the force-measuring bearing measures force is as follows: The bearing load acts on the force-measuring plate, the force-measuring plate transmits the load to one end of the force-measuring probe, and the other end of the force-measuring probe contacts the sensor.

[0068] The calibration method for the force-measuring bearing includes the following steps:

[0069] S1: Determine the load range applied to the force-measuring probe.

[0070] S2: Apply a load to the force-measuring probe at a constant speed, move the force-measuring probe away from the sensor during the forward stroke and move it closer to the sensor during the return stroke, select several load recording points, and record the standard loading force values at each load point and the monitored force values corresponding to each load point.

[0071] S3: Calibrate the sensor based on the change values between the standard loading force values and the monitored force values at each load point in step S2 above.

[0072] Step S2 is repeated three times.

[0073] The position of the sensor remains fixed.

[0074] The load applied to the force-measuring probe does not exceed the load range determined in step S1.

[0075] There are two ways to determine the load range. The first is to record the initial monitored force value. If the initial monitored force value is A0, A0 is the load range. The monitored force value during the process of applying a load to the force-measuring probe at a constant speed is A, and the load applied to the force-measuring probe at a constant speed is B. The specific value of B is set according to the needs of the calibration of the force-measuring bearing, and B ≤ A0.

[0076] During the forward stroke operation, when B < A0, stop loading when the load B is applied to the force-measuring probe at a constant speed, record the A value and B value at this time, select several load recording points during the loading process, record the standard loading force values at each load point, such as B1, B2, B3, B4, B5, and at the same time record the monitored force values corresponding to each load point, such as A1, A2, A3, A4, A5. The change values of the corresponding monitored force values are C1, C2, C3, C4, C5, where C1 = A0 - A1, C2 = A0 - A2, C3 = A0 - A3, C4 = A0 - A4, C5 = A0 - A5, and so on.

[0077] B1, B2, B3, B4, B5 and C1, C2, C3, C4, C5 form the calibration of the sensor.

[0078] If the full range to be calibrated for the force measuring support is A0, when applying a load B to the force measuring probe at a uniform speed, the loading should be stopped when the monitored force value A no longer changes, and record the A value and B value at this time. Similarly, during the loading process, select several load recording points, and record the standard loading force values at each load point and the monitored force values corresponding to each load point.

[0079] During the return stroke actuation process, it is equivalent to reducing the load value previously applied to the force measuring probe. During the process of reducing the load value, the loading force value after the load reduction is used as the standard loading force value, rather than the reduced load force value. For example, if the known force value of the load applied to the force measuring probe before the load reduction is M, and the known force value of the reduced load is N, then the change value of F and the monitored force value form the calibration of the sensor, where F = M - N. Similarly, during the return stroke actuation process, select several load recording points, and record the standard loading force values at each load point and the monitored force values corresponding to each load point.

[0080] The process actuation process can be carried out first or the return stroke actuation process can be carried out first.

[0081] Example 2 of the calibration method for the force measuring support during the operation period:

[0082] The main difference from Example 1 lies in the method of confirming the load range. The second method of determining the load range is to first record the initial monitored force value A0, and then apply a load P to the force measuring probe until the monitored force value no longer changes. At this time, the load P is the determined load range.

[0083] During the process actuation process, when B < P, apply the load to the force measuring probe at a uniform speed until the load B is reached and then stop loading.

[0084] If the full range to be calibrated for the force measuring support is P, similarly, apply the load to the force measuring probe at a uniform speed until the load B is reached and then stop loading. At this time, B = P.

[0085] To avoid inaccurate data caused by the influence of the change in the position of the sensor on the monitored force value, the position of the sensor remains fixed.

[0086] During the process of the force measuring probe moving away from the sensor during the process actuation and moving closer to the sensor during the return stroke actuation, it is a process of unloading and restoring the force between the force measuring probe and the sensor without other interference, which does not affect the force-bearing state between the force measuring plate and the force measuring probe, has no impact on the accuracy of the monitored data, ensures the accuracy and authenticity of the calibration result of the force measuring support. After the calibration is completed, the force measuring support completely returns to the state before calibration, and the force measuring support immediately resumes normal use.

[0087] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0088] It should be understood that this application is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method of replacing an in-service load cell sensor, comprising: The force transmission path of the force measuring support when measuring force is: the support load acts on the force measuring plate, the force measuring plate transmits the load to one end of the force measuring probe, and the other end of the force measuring probe contacts the sensor; The method comprises the following steps: S1: uniformly applying a load to the force measuring probe, the load being not more than the monitoring force value range before the sensor is replaced, unloading the force between the force measuring probe and the sensor until the monitoring force value no longer changes, stopping applying the load to the force measuring probe, and fixing the force measuring probe; S2: installing the calibrated sensor after the sensor is removed: S3: uniformly unloading the load acting on the force measuring probe, the force measuring probe re-contacting the sensor until the monitoring force value no longer changes, indicating that the force measuring probe has been completely released, and the monitoring data before the sensor is replaced is completely and accurately inherited after the sensor is replaced.

2. The method of claim 1, wherein, In the steps S1 and S3, the position of the sensor is fixed and unchanged.

3. A method of replacing an operating period load cell sensor according to any one of claims 1-2, characterized in that, In the step S2, when the sensor is installed, the relative position of the sensor and the force measuring probe is finely adjusted until the monitoring force value drifts around zero until the monitoring force value is stable at 0, and the installation of the sensor is completed.

4. A method of calibrating an in-service load cell, characterized by ,The force transmission path of the force measuring support when measuring force is: the support load acts on the force measuring plate, the force measuring plate transmits the load to one end of the force measuring probe, and the other end of the force measuring probe contacts the sensor; The method comprises the following steps: S1: determining the load range applied to the force measuring probe; S2: uniformly applying a load to the force measuring probe, the force measuring probe moving away from and returning to the sensor, selecting a plurality of load recording points, and recording the standard load force value of each load point and the corresponding monitoring force value of each load point; S3: forming a sensor calibration according to the change value of the standard load force value of each load point and the corresponding monitoring force value of each load point in the above step S2.

5. A method of calibrating an in-service load cell according to claim 4, wherein, The position of the sensor is fixed and unchanged.

6. The method of claim 4, wherein, In the step S2, the load applied to the force measuring probe is not more than the load range determined in the step S1.

7. The calibration method of the force measuring support in the operation period according to any one of claims 4-6, wherein The step S2 is repeated three times.

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