A method for measuring the thickness of the base metal of a corrugated beam steel guardrail

Abstract

This invention relates to a method for measuring the thickness of the base metal of a corrugated beam steel guardrail. The measuring device mainly consists of a main structure, a data acquisition system, a display system, an operation button system, a plate thickness display device, a measurement adjustment device, and measurement acquisition and analysis software. Compared with the traditional method of using a micrometer and coating thickness gauge, which involves two separate measurements after determining the position, this device, based on the principle of a micrometer screw gauge and magnetic thickness measurement technology, achieves integrated measurement of the base metal thickness of the corrugated beam steel guardrail to meet actual testing needs. This avoids introducing errors, making the testing process simpler, more efficient, and more accurate, and has good applicability.

Description

Technical Field

[0001] This invention relates to the field of quality inspection equipment technology, specifically to a method for measuring the thickness of the base metal of a corrugated beam steel guardrail. Based on the principle of a micrometer screw gauge and magnetic thickness measurement technology, this method achieves integrated measurement of the base metal thickness of a corrugated beam steel guardrail to meet actual inspection needs. Background Technology

[0002] In recent years, with the rapid development of my country's economy, the construction of expressways has accelerated, and the number of motor vehicles and drivers nationwide has increased rapidly. Expressway management has become increasingly arduous and complex, requiring constant attention to new problems and challenges. The quality and performance of traffic safety facilities is a crucial area in this process. As the total length of highways in operation across the country continues to increase, newly built expressway traffic safety facilities require final acceptance testing, while operational sections need regular quality inspections to ensure they meet highway operation requirements. Corrugated steel guardrails are particularly important among road traffic safety facilities, serving as both barriers and protectors. When vehicles collide with them, the corrugated steel guardrails, with their excellent impact resistance and energy absorption, are not easily destroyed and provide excellent protection for vehicles and occupants.

[0003] The current main method for inspecting the thickness of the base metal of corrugated beam steel guardrails involves first determining the inspection location, then using a micrometer to measure the overall thickness of the guardrail at that location, marking the location, and then using a coating thickness gauge to measure the coating thickness on both sides of the marked point. The base metal thickness value at the inspection point is then calculated. However, this method is cumbersome and requires accurate marking of both sides of the inspection point. Especially when inspecting guardrail posts or conducting large-scale sampling, it is difficult for the thickness value of a single inspection point to correspond one-to-one with the coating thickness value. This introduces significant human error into the measurement data, ultimately affecting the quality assessment of the corrugated beam steel guardrail. Summary of the Invention

[0004] To address the current problems in measuring the thickness of the base metal of corrugated beam steel guardrails, this patent proposes a novel method for measuring the base metal thickness. Based on the needs of different testing scenarios, it combines the principle of a micrometer screw gauge with magnetic thickness measurement technology, realizing integrated measurement of the base metal thickness of corrugated beam steel guardrails, making the testing more efficient, accurate, and easy to operate.

[0005] A method for measuring the thickness of the base metal of a corrugated beam steel guardrail. The measuring device includes: a data acquisition system, a measurement adjustment device, and measurement acquisition and analysis software. The data acquisition system consists of a double-layered axial structure at both ends. The outer layer structure, used for overall plate thickness detection, has one fixed end and the other adjustable end. Both ends of the inner layer structure are movable. When the beam to be measured is locked, both ends of the inner layer structure are simultaneously pushed towards the beam to measure the coating thickness on both sides. The measurement adjustment device includes a main adjustment and a supplementary adjustment mechanism to perform coarse and fine adjustments during overall plate thickness measurement. The measurement acquisition and analysis software acquires the overall thickness value, the double-sided coating thickness value, the base metal thickness value, and the data acquisition location information, and performs analysis, calculation, and storage.

[0006] Determine the beam or column to be measured, select the detection position, and then place the acquisition system on both sides of the surface to be measured. First, use the main adjustment mechanism in the measurement adjustment device for coarse adjustment. The fixed end of the outer structure of the acquisition system contacts the beam to be measured, and the other end of the outer structure of the acquisition system moves towards the fixed end at a constant speed. When it is about to make contact, use the supplementary adjustment mechanism in the measurement adjustment device for fine adjustment, so that the outer structure of the acquisition system continues to tighten until the ratchet makes a sound and locks. At this time, the reading result is the overall thickness value L of the beam to be measured. At the same time, both ends of the inner structure of the acquisition system move towards the contact surface of the beam to be measured at a constant speed. When the contact pressure value reaches the threshold, the coating thickness measurement is started in stages, and the coating thickness values ​​H1 and H2 on both sides are recorded respectively. Then, the base metal thickness H can be obtained by calculation. After unlocking, the main adjustment mechanism in the measurement adjustment device releases the beam to be measured and proceeds to the next position point measurement.

[0007] This invention proposes a method for measuring the thickness of the base metal of corrugated beam steel guardrails. Compared with the traditional method of using a micrometer and coating thickness gauge to measure the thickness in two steps after determining the position, this device is based on the principle of a micrometer screw gauge and magnetic thickness measurement technology. It achieves integrated measurement of the base metal thickness of corrugated beam steel guardrails to meet actual testing needs, avoids introducing errors, and makes the testing process simpler, more efficient, and more accurate, with good applicability. Attached Figure Description

[0008] Figure 1 This is a structural diagram of the corrugated beam steel guardrail base metal thickness measuring device system in this invention.

[0009] Figure 2 This is a schematic diagram of the internal structure of the detection device in this invention.

[0010] Figure 3 This is a schematic diagram of the measurement principle of the detection device in this invention.

[0011] In the picture:

[0012] 1-Main structure, 21-First measuring end, 22-Second measuring end, 3-Display system, 41-Lock button, 42-Test button, 43-Page forward button, 44-Page backward button, 45-Confirm button, 51-Coarse reading component, 52-Fine reading component, Main adjustment component-61, Supplementary adjustment component-62;

[0013] 2-Coating thickness measurement connection structure, 3L-Overall thickness measurement connection structure, 4-Central connector, A1-Support end, A2-Moving acquisition end, (A3, A4)-Fixing bolts; B1-First inner layer component, B2-Second inner layer component, B3-Coating thickness test transmitter of first inner layer component B1, B4-Coating thickness test transmitter of second inner layer component B2, B5-Pushing component of first inner layer component, B6-Power component of first inner layer component, (B7, B8)-First built-in guide rail, B9-Pushing component of second inner layer component B2, B10-Power component of second inner layer component B2, (B11, B12)-Second built-in guide rail, B13-Linkage device, B14-Connection channel;

[0014] L - the beam / slab under test, J - the beam / slab under partial test. Detailed Implementation

[0015] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a method for measuring the thickness of the base metal of a corrugated beam steel guardrail according to the present invention:

[0016] Example:

[0017] Combination Figure 1 As shown, Figure 1 This is a structural diagram of the corrugated beam steel guardrail base metal thickness measuring device system of the present invention. 1 represents the main structure; the data acquisition system includes 21 and 22; 3 represents the display system; the operation button system includes 41, 42, 43, 44, and 45; the plate thickness display device includes 51 and 52; and 5 represents the measurement and adjustment device, including 61 and 62.

[0018] As shown Figure 1 The central section (1) forms the main structure, upon which all systems and components are connected. (See diagram.) Figure 1 Models 21 and 22 are the data acquisition system, mainly composed of a double-layered axial structure at both ends. The outer layer is primarily used for overall plate thickness detection. The outer layer is divided into two ends, A and B. End A is fixed, and the overall plate thickness is determined by adjusting the position of end B. The inner layer is also divided into two ends, A and B. After locking the beam under test, both ends A and B of the inner layer are pushed towards the beam under test simultaneously to measure the coating thickness on both sides.

[0019] As shown Figure 1The third part is the display system, which can display the overall thickness value, double-sided coating thickness value, base metal thickness value, and data acquisition location information after the data acquisition is completed. It can also query historical data acquisition.

[0020] As shown Figure 1 The operation button system is mainly used for inputting the location information of the collected data and querying historical collected data. Among them, 41 is the lock button, used to lock and unlock after the overall beam and slab thickness value test is completed; 42 is the test button, which is used to start the detection of the coating thickness on both sides of the beam and slab after locking; 43 is the forward page key and 44 is the backward page key, used for switching positions and searching historical data; 45 is the confirmation button, used for confirming the searched and entered information.

[0021] As shown Figure 1 The plate thickness display device in the middle can subjectively read the collected results, and the actual collected values ​​will be directly displayed through the display system; among them, 51 is the coarse reading component and 52 is the fine reading component.

[0022] As shown Figure 1 The measuring and adjusting device is mainly used to detect the overall thickness of the beam slab. First, it is coarsely adjusted by the main adjusting component 61. When it is about to contact the beam slab being measured, it is further tightened by the knob of the supplementary adjusting component 62. When the ratchet makes a sound, press the locking button. At this time, the reading result is the overall thickness value L of the beam slab being measured.

[0023] The measurement and analysis software analyzes and calculates the collected real-time data to obtain the base metal thickness value. The location information can be sequentially extended by the station number after the first collection of the project group is determined. After the collection is completed, the collected data, analysis data and location information are stored.

[0024] Combination Figure 2 As shown, Figure 2 This is a schematic diagram of the internal structure of the detection device in this invention. 1 represents the main structure, 2 represents the coating thickness measurement connection structure, 3L represents the overall thickness measurement connection structure, and 4 represents the central connector. The overall thickness measurement system includes A1 to A6, and the coating thickness measurement system includes B1 to B14.

[0025] As shown Figure 2 The main structure is 1, and all systems and components are connected to it, providing support for the other components.

[0026] As shown Figure 2 2 is the coating thickness measurement connection structure, which mainly connects the coating thickness measurement system and the central connector 4. When the test button is pressed after locking, the coating thickness measurement connection structure is triggered through the central connector, and the coating acquisition program is started.

[0027] As shown Figure 2The 3L section is the overall thickness measurement connection structure, which mainly connects the overall thickness measurement system and the central connector 4. When the overall thickness measurement system completes the acquisition, it will transmit the acquired data to the central connector 4. When locked and the test button is pressed, the coating thickness measurement signal will pass through the central connector and then start the coating thickness measurement system.

[0028] As shown Figure 2 4 is the central connector, which mainly connects the coating thickness measurement connection structure 2 and the overall thickness measurement connection structure 3L, and plays a linkage role between the overall thickness measurement system A and the coating thickness measurement system B.

[0029] As shown Figure 2 The overall thickness measurement system includes A1 to A6;

[0030] A1 is the outer layer structure of the entire device acquisition system. When measuring the overall thickness value, A1 is the support end and remains in place.

[0031] A2 is the outer layer structure of the entire acquisition system. When measuring the overall thickness, A2 is the moving acquisition end. First, use the main adjustment component 61 in the measurement adjustment device for coarse adjustment. When the A1 end contacts the beam plate being measured, the outer layer structure A2 end of the acquisition system moves towards the A1 end at a constant speed. When it is about to contact, use the supplementary adjustment knob A6 in the measurement adjustment device for fine adjustment, so that the outer layer structure of the acquisition system continues to tighten. When the ratchet makes a sound, press the lock button. At this time, the distance between A1 and A2 is the overall thickness value of the beam plate being measured, and the reading result is L.

[0032] A3 and A4 are fixing bolts that connect the data acquisition system and measurement adjustment device to the main structure;

[0033] The measuring and adjusting device is mainly used to detect the overall thickness of the beam and slab. First, it is coarsely adjusted by the main adjusting component 61. When it is about to contact the beam and slab being measured, it is further tightened by the knob of the supplementary adjusting component 62. When the ratchet makes a sound, press the locking button. At this time, the reading result is the overall thickness value L of the beam and slab being measured.

[0034] As shown Figure 2 The intermediate coating thickness measurement system includes B1 to B14;

[0035] B1 is the first inner layer component. When the coating thickness measurement is started, B1 will move at a constant speed towards the beam plate being measured by relying on the built-in guide rails B7 and B8. When the contact pressure value reaches the threshold, the movement will stop.

[0036] B2 is the second inner layer component. When the coating thickness measurement is started, B2 will move at a constant speed towards the beam plate being measured by relying on the built-in guide rails B11 and B12. When the contact pressure value reaches the threshold, it will stop moving.

[0037] B3 is the coating thickness test transmitter of the first inner layer component B1. When B1 reaches the threshold and stops moving, B3 will be activated in time-sharing mode to emit electromagnetic waves and measure the coating thickness value of the beam plate in contact with B3.

[0038] B4 is the coating thickness test transmitter of the second inner layer component B2. When B2 reaches the threshold and stops moving, B4 will be activated in time-sharing mode to emit electromagnetic waves and measure the coating thickness value of the beam plate in contact with B4.

[0039] B5 is the driving component of the inner layer structure B1. When the coating thickness measurement is started, B5 will advance at a constant speed.

[0040] B6 is the power component of the inner structure B1, with a built-in small stepper motor. When the coating thickness measurement is started, B6 will provide a uniform thrust to B5. When the resistance value is sensed and the resistance value reaches the threshold, it will enter the state holding state.

[0041] B7 and B8 are the first built-in guide rails of the inner structure B1, used for horizontal movement;

[0042] B9 is the driving component of the second inner layer component B2. When the coating thickness measurement is started, B9 will advance at a constant speed.

[0043] B10 is the power component of the second inner layer component B2. It has a built-in small stepper motor. When the coating thickness measurement is started, B10 will provide a uniform thrust to B9. When the resistance value is sensed and the resistance value reaches the threshold, it will enter the state holding state.

[0044] B11 and B12 are the second built-in guide rails of the second inner layer component B2, used for horizontal movement;

[0045] B13 is the linkage device between the inner layer structures B1 and B2 in the coating thickness measurement system, used for signal synchronization and real-time data acquisition and uploading;

[0046] B14 is a connection channel, mainly used for the transmission of power and control signals between the inner layers of the coating thickness measurement system;

[0047] Combination Figure 3 As shown, Figure 3 This is a schematic diagram illustrating the measurement principle of the detection device in this invention. L represents the beam plate being measured, and J represents a portion of the beam plate being measured.

[0048] As shown Figure 3 In the figure, L represents the beam plate being measured. The double-wave beam steel guardrail is used as an example in the figure. The measurement process of the base metal thickness of the triple-wave beam steel guardrail and guardrail post is the same.

[0049] As shown Figure 3In the figure, J represents a portion of the beam being tested. As shown, the distance H1 between AB represents the coating thickness on the upper surface of the beam, the distance H2 between CD represents the coating thickness on the lower surface of the beam, and the distance L between AD represents the overall thickness of the beam. From the figure, the thickness H of the metal substrate in a single test should be:

[0050] H = L - (H1 + H2)

[0051] The coating thickness on both sides was measured multiple times at different times to avoid introducing measurement errors.

[0052] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Various changes that can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for measuring the thickness of the base metal of a corrugated beam steel guardrail, characterized in that, The measurement method is based on a measurement device, which includes: a main structure, a data acquisition system, a measurement adjustment device, and measurement acquisition and analysis software. The acquisition system consists of a double-layered axial structure at both ends, used for overall plate thickness detection. One end of the outer layer is fixed, while the other end is movable and adjustable. Both ends of the inner layer are movable. When the beam under test is locked, both ends of the inner layer are simultaneously pushed towards the beam to measure the coating thickness on both sides. The acquisition system is connected to the main structure. The acquisition system also includes a coating thickness measurement system, comprising a first inner layer component mounted on a first built-in track and a second inner layer component mounted on a second built-in track. The coating thickness testing transmitter of the first inner layer component emits electromagnetic waves to measure the coating thickness value H1 at the location of the beam under test in contact with the first inner layer component. The coating thickness testing transmitter of the second inner layer component emits electromagnetic waves to measure the coating thickness value H2 at the location of the beam under test in contact with the second inner layer component. The measurement and adjustment device includes a main adjustment mechanism and a supplementary adjustment mechanism to complete the coarse and fine adjustments during the overall plate thickness measurement; the measurement and adjustment device is connected based on the main structure. The measurement, acquisition, and analysis software collects the overall thickness value, the thickness values ​​of the coatings on both sides, the thickness value of the base metal, and the data location information, and then analyzes, calculates, and stores the data. The method includes the following steps: Determine the beam or column to be measured, select the detection position, and then place the acquisition system on both sides of the surface to be measured. First, use the main adjustment mechanism in the measurement adjustment device for coarse adjustment. The fixed end of the outer structure of the acquisition system contacts the beam to be measured, and the other end of the outer structure of the acquisition system moves towards the fixed end at a constant speed. When it is about to make contact, use the supplementary adjustment mechanism in the measurement adjustment device for fine adjustment, so that the outer structure of the acquisition system continues to tighten until the ratchet makes a sound and locks. At this time, the reading result is the overall thickness value L of the beam to be measured. At the same time, both ends of the inner structure of the acquisition system move towards the contact surface of the beam to be measured at a constant speed. When the contact pressure value reaches the threshold, the coating thickness measurement is started in stages, and the coating thickness values ​​H1 and H2 on both sides are recorded respectively. Then, the base metal thickness H can be obtained by calculation. After unlocking, the main adjustment mechanism in the measurement adjustment device releases the beam to be measured and proceeds to the next position point measurement.

Images