Online detection device and method for Bockel hardness of composite material pipeline

Abstract

The invention provides a method and device for online detection of Barole hardness of a composite pipeline, the device comprises a support, a pressing needle, a driving mechanism and a sensing assembly, the driving mechanism is fixed on the support, a movable end of the driving mechanism is connected with the pressing needle and is used for driving the pressing needle to be close to or away from a detected object, and the sensing assembly is used for sensing the detected object. The sensing assembly comprises a laser distance measuring sensor and a pressure sensor, the laser distance measuring sensor is fixed to the support and is coaxial with the pressing needle, the detection end of the laser distance measuring sensor faces the pressing needle and is used for detecting the distance between the laser distance measuring sensor and the pressing needle, and the pressure sensor is embedded in the end, facing the object to be detected, of the pressing needle and is used for detecting the distance between the pressure sensor and the pressing needle. The pressure sensor is used for detecting pressure of the end portion of the pressing needle. The device is provided with a pressing needle, a driving mechanism and a sensing assembly, the driving mechanism is used for driving the pressing needle to be close to or away from a detected object, the sensing assembly comprises a laser distance measuring sensor and a pressure sensor, the laser distance measuring sensor is used for detecting the distance between the laser distance measuring sensor and the pressing needle, and the pressure sensor is used for detecting the distance between the pressing needle and the pressure sensor. And the pressure sensor is used for detecting the pressure of the end part of the pressing needle, so that during use, the whole equipment can be arranged on one side of a continuously wound pipeline to carry out continuous detection, the whole detection process does not need to stop the processing of the pipeline, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of hardness testing technology, and in particular to an online Barcol hardness testing device and method for composite material pipes. Background Technology

[0002] In the production of composite material pipes, resin-impregnated fibers need to be continuously wound around their surface. As the winding process continues, the fibers gradually solidify on the pipe surface. The hardness needs to be monitored in real time during the winding process.

[0003] The existing testing method is to directly measure with a Barcol hardness tester. However, this method has the following problems: the Barcol hardness tester (GB / T 3854) requires static pressure and relies on a rigid backing, so it cannot be used on continuously moving, uncured curved pipes, and is not suitable for continuously wound pipes. Summary of the Invention

[0004] In view of this, it is necessary to provide an online Barcol hardness testing device and method for composite material pipes, which can meet the needs of online hardness testing for continuously wound pipes.

[0005] This invention provides an online Barcol hardness testing device for composite material pipes, comprising: support; Press needle; A drive mechanism, fixed to the bracket, has its movable end connected to the pressure needle, used to drive the pressure needle closer to or further away from the object being tested; and The sensing component includes a laser rangefinder and a pressure sensor. The laser rangefinder is fixed on the bracket and coaxially arranged with the pressure needle, with its detection end facing the pressure needle for detecting the distance to the pressure needle. The pressure sensor is embedded in the end of the pressure needle facing the object being measured for detecting the pressure at the end of the pressure needle.

[0006] In other embodiments, the bracket extends to form a first fixed end and a second fixed end, the first fixed end and the second fixed end being located in the same plane, the drive mechanism being fixed on the first fixed end, and the laser rangefinder being fixed on the second fixed end.

[0007] In other embodiments, the tip of the pressure needle is a tungsten carbide cone with a diameter of 0.5–1 mm and a cone angle of 60°±5°.

[0008] In other embodiments, the drive mechanism includes a servo motor and a fixed arm. The servo motor is fixed to the first fixed end, the movable end of the servo motor is fixed to the fixed arm, and the other end of the fixed arm is fixed to the middle of the pressure needle.

[0009] In other embodiments, the first fixed end is provided with multiple layers of shock-absorbing pads, and the servo motor is disposed on the shock-absorbing pads. The function of the shock-absorbing pads is to resist the influence of vibration on the servo motor.

[0010] In other embodiments, a cleaning assembly is also included, which is disposed corresponding to the pressure needle. The cleaning assembly has a spray end facing the tip of the pressure needle for cleaning the tip of the pressure needle.

[0011] In other embodiments, the cleaning assembly includes a solvent tank, an infusion tube, and a nozzle. The solvent tank is fixed on the support, the nozzle is fixed on the support and faces the tip of the pressure needle, one end of the infusion tube is connected to the solvent tank, the other end of the infusion tube is connected to the nozzle, and the infusion tube is equipped with an on / off infusion pump.

[0012] In other embodiments, the bracket is provided with a third fixed end and a fourth fixed end, the solvent tank is fixed on the third fixed end, the fourth fixed end is correspondingly arranged with the second fixed end, and the nozzle is fixed on the fourth fixed end.

[0013] This invention also provides an online method for testing the Barcol hardness of composite material pipes, based on the online Barcol hardness testing device for composite material pipes described in any of the above claims, characterized by comprising the following steps: Install a Barcol online hardness testing device for composite material pipes; Calibrate the sensor data of the Barcol online hardness testing device for composite material pipes; The items to be tested are then inspected. The Barcol hardness of the tested item is calculated based on the test results.

[0014] In other embodiments, calibrating the sensor data of the Barcol hardness online testing device for composite material pipes includes the following steps: Composite material pipe samples with different degrees of curing were prepared; The online Barcol hardness testing device for composite pipes was used to simultaneously measure the same area of ​​composite pipe samples at different curing degrees with a standard Barcol hardness tester; the hardness value HBa of the composite pipe samples at different curing degrees was obtained, and the indentation depth Δl and pressure were recorded by the online testing device; The relationship between the hardness value HBa and the depth Δl and the magnitude of the pressure was fitted to form a formula.

[0015] The beneficial effects of this invention are as follows: This invention includes a support, a pressure needle, a driving mechanism, and a sensing assembly. The driving mechanism is fixed to the support, and its movable end is connected to the pressure needle, used to drive the pressure needle closer to or away from the object being tested. The sensing assembly includes a laser rangefinder and a pressure sensor. The laser rangefinder is fixed to the support and coaxially arranged with the pressure needle, its detection end facing the pressure needle, used to detect the distance to the pressure needle. The pressure sensor is embedded in the end of the pressure needle facing the object being tested, used to detect the pressure at the end of the pressure needle. In this invention, the pressure needle, driving mechanism, and sensing assembly are provided. The driving mechanism drives the pressure needle closer to or away from the object being tested. The sensing assembly includes a laser rangefinder and a pressure sensor. The laser rangefinder detects the distance to the pressure needle, and the pressure sensor detects the pressure at the end of the pressure needle. This allows the entire device to be placed on one side of a continuously wound pipe for continuous testing without stopping pipe processing, thus improving testing efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the Barcol hardness online testing device for composite material pipes in this invention; Figure 2 for Figure 1 A top view of the drive mechanism and sensing components; Wherein: 1-bracket; 11-first fixed end, 11a-shock-absorbing pad, 12-second fixed end; 13-third fixed end; 14-fourth fixed end; 2-pressure needle; 3-drive mechanism, 31-servo motor, 32-fixed arm; 4-sensing component, 41-laser rangefinder sensor, 42-pressure sensor; 5-cleaning component, 51-solvent tank, 52-infusion tube, 53-nozzle. Detailed Implementation

[0018] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0019] like Figure 1-2As shown, an embodiment of the present invention provides an online Barcol hardness testing device for composite material pipes, which includes: a support 1, an indenter 2, a drive mechanism 3, and a sensing component 4. The drive mechanism 2 is fixed on the support 1, and the movable end of the drive mechanism 2 is connected to the indenter 2 for driving the indenter 2 to move closer to or away from the object being tested. The sensing component 4 includes a laser rangefinder 41 and a pressure sensor 42. The laser rangefinder 41 is fixed on the support 1 and coaxially arranged with the indenter 2, and its detection end faces the indenter 2 for detecting the distance to the indenter 2. The pressure sensor 42 is embedded in the end of the indenter 2 facing the object being tested for detecting the pressure at the end of the indenter 2.

[0020] In use, the driving mechanism 3 drives the pressure needle 2 to contact the surface of the object being tested, reaching the initial state. At this time, the laser range sensor 41 measures the distance L1 between itself and the pressure needle 2. The driving mechanism 3 pushes the pressure needle 2 towards the object being tested, and the end of the pressure needle 2 contacts the surface of the object being tested and partially extends into the surface of the object being tested. The pressure sensor 42 detects the pressure at the end of the pressure needle 2. When the pressing force fed back by the pressure sensor 42 reaches the set pressure value K, the laser range sensor 41 measures the distance L2 between itself and the pressure needle 2. The driving mechanism 3 drives the pressure needle 2 to move away from the object being tested. Subsequently, the hardness value is calculated based on the distance L1, the distance L2, and the pressure value K.

[0021] In this invention, a pressure needle 2, a driving mechanism 3, and a sensing component 4 are provided. The driving mechanism 2 is used to drive the pressure needle 2 to move closer to or away from the object being tested. The sensing component 4 includes a laser rangefinder 41 and a pressure sensor 42. The laser rangefinder 41 is used to detect the distance to the pressure needle 2, and the pressure sensor 42 is used to detect the pressure at the end of the pressure needle 2. This allows the entire device to be set on one side of the pipe being continuously wound during use, enabling continuous testing without stopping the pipe processing, thus improving testing efficiency.

[0022] Specifically, the bracket 1 extends to form a first fixed end 11 and a second fixed end 12. The first fixed end 11 and the second fixed end 12 are located in the same plane. The driving mechanism 3 is fixed on the first fixed end 11, and the laser ranging sensor 41 is fixed on the second fixed end 12.

[0023] Specifically, the tip of the pressure needle 2 is a tungsten carbide cone with a diameter of 0.5–1 mm and a cone angle of 60°±5°. The purpose of this design is to avoid the tip of the pressure needle 2 being too sharp and directly piercing the resin layer of the tested item, thereby causing the resin layer to lose its functional role.

[0024] Specifically, the driving mechanism 3 includes a servo motor 31 and a fixed arm 32. The servo motor 31 is fixed to the first fixed end 11, and the movable end of the servo motor 31 is fixed to the fixed arm 32. The other end of the fixed arm 32 is fixed to the middle of the pressure needle 2. The purpose of setting the fixed arm 32 is to form a clearance area, enabling the laser range sensor 41 to detect the distance to the pressure needle 2. In use, the servo motor 31 drives the pressure needle 2 to move closer to or away from the object being measured via the fixed arm 32.

[0025] Furthermore, the first fixed end 11 is provided with multiple layers of shock-absorbing pads 11a, and the servo motor 31 is disposed on the shock-absorbing pads 11a. The function of the shock-absorbing pads 11a is to resist the influence of vibration on the servo motor 31.

[0026] Specifically, it also includes a cleaning component 5, which is disposed corresponding to the pressure needle 2. The cleaning component 5 has a spray end facing the tip of the pressure needle 2 and is used to clean the tip of the pressure needle 2.

[0027] Furthermore, the cleaning assembly 5 includes a solvent tank 51, an infusion tube 52, and a nozzle 53. The solvent tank 51 is fixed to the support 1, and the nozzle 53 is fixed to the support 1 and faces the tip of the pressure needle 2. One end of the infusion tube 52 is connected to the solvent tank 51, and the other end is connected to the nozzle 53. The infusion tube 52 is equipped with an on / off infusion pump. The solution in the solvent tank 51 is delivered to the nozzle 53 through the infusion tube 52. The nozzle 53 sprays the solution onto the tip of the pressure needle 2 to clean the pressure needle 2 and prevent resin residue from remaining on the nozzle 53.

[0028] Furthermore, the bracket 1 is provided with a third fixed end 13 and a fourth fixed end 14. The solvent tank 51 is fixed on the third fixed end 13, the fourth fixed end 14 is correspondingly arranged with the second fixed end 12, and the nozzle 53 is fixed on the fourth fixed end 14.

[0029] Furthermore, the solvent tank 51 is filled with organic solvent, which can effectively remove the resin remaining on the tip of the needle 2, thus preventing the resin remaining on the tip of the needle 2 from affecting the detection effect.

[0030] Furthermore, it also includes the processing module, which is electrically connected to the drive mechanism 3, the laser rangefinder 41, and the pressure sensor 42. The processing module receives the detection data from the laser rangefinder 41 and the pressure sensor 42, and controls the drive mechanism 3 to work and calculates the hardness value of the tested item based on the detection data from the laser rangefinder 41 and the pressure sensor 42.

[0031] This invention also provides an online method for testing the Barcol hardness of composite material pipes, which includes the following steps: S1, Install a Barcol hardness online testing device for composite material pipes; S2, calibrate the sensor data of the Barcol hardness online testing device for composite material pipes; S3, to test the item being tested; S4, calculate the hardness value of the tested item based on the test results.

[0032] Further steps for calibrating the sensor data of the Barcol hardness online testing device for composite material pipes include: S21, Prepare composite pipe samples with different degrees of curing; S22, using a composite material pipe Barcol hardness online testing device and a standard Barcol hardness tester to simultaneously measure the same area of ​​composite material pipe samples with different degrees of curing; obtaining the hardness value HBa of FRP samples with different degrees of curing, and the online testing device recording the indentation depth Δl and pressure magnitude; S23, fits to form the relationship between hardness value HBa and depth Δl and pressure magnitude.

[0033] Further steps in testing the items include: S31, the driving mechanism drives the pressure needle to contact the surface of the object being tested, reaching the initial state, and the laser range sensor measures the distance L1 between it and the pressure needle; S32, the driving mechanism pushes the pressure needle towards the object being tested. The end of the pressure needle contacts the surface of the object being tested and partially extends into the surface of the object being tested. When the pressure sensor feedback of the pressing force reaches the set pressure value, the laser rangefinder measures the distance L2 between itself and the pressure needle. S33, the driving mechanism drives the pressure needle to move away from the test object. Subsequently, Δl is calculated based on the distance L1 and distance L2. Combined with the previously fitted curve, the Barcol hardness of the test object can be calculated and analyzed.

[0034] The beneficial effects of this invention are: The present invention includes a bracket, a pressure needle, a driving mechanism, and a sensing component. The driving mechanism is fixed on the bracket, and its movable end is connected to the pressure needle for driving the pressure needle to move closer to or away from the object being tested. The sensing component includes a laser rangefinder and a pressure sensor. The laser rangefinder is fixed on the bracket and coaxially arranged with the pressure needle, and its detection end faces the pressure needle for detecting the distance to the pressure needle. The pressure sensor is embedded in the end of the pressure needle facing the object being tested for detecting the pressure at the end of the pressure needle.

[0035] In this invention, a pressure needle, a driving mechanism, and a sensing component are provided. The driving mechanism is used to drive the pressure needle to move closer to or away from the object being tested. The sensing component includes a laser rangefinder and a pressure sensor. The laser rangefinder is used to detect the distance to the pressure needle, and the pressure sensor is used to detect the pressure at the end of the pressure needle. This allows the entire device to be placed on one side of a pipe undergoing continuous winding during use, enabling continuous testing without stopping the pipe processing, thus improving testing efficiency.

[0036] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0037] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An online Barcol hardness testing device for composite material pipes, characterized in that, include: support; Press needle; A drive mechanism, fixed to the bracket, has its movable end connected to the pressure needle, used to drive the pressure needle closer to or further away from the object being tested; and The sensing component includes a laser rangefinder and a pressure sensor. The laser rangefinder is fixed on the bracket and coaxially arranged with the pressure needle, with its detection end facing the pressure needle for detecting the distance to the pressure needle. The pressure sensor is embedded in the end of the pressure needle facing the object being measured for detecting the pressure at the end of the pressure needle.

2. The online Barcol hardness testing device for composite material pipes as described in claim 1, characterized in that, The bracket extends to form a first fixed end and a second fixed end, the first fixed end and the second fixed end are located in the same plane, the driving mechanism is fixed on the first fixed end, and the laser ranging sensor is fixed on the second fixed end.

3. The online Barcol hardness testing device for composite material pipes as described in claim 1, characterized in that, The tip of the pressure needle is a tungsten carbide cone with a diameter of 0.5–1 mm and a cone angle of 60°±5°.

4. The online Barcol hardness testing device for composite material pipes as described in claim 1, characterized in that, The drive mechanism includes a servo motor and a fixed arm. The servo motor is fixed on the first fixed end, the movable end of the servo motor is fixed to the fixed arm, and the other end of the fixed arm is fixed to the middle of the pressure needle.

5. The online Barcol hardness testing device for composite material pipes as described in claim 4, characterized in that, The first fixed end is provided with multiple layers of shock-absorbing pads, and the servo motor is mounted on the shock-absorbing pads. The function of the shock-absorbing pads is to resist the influence of vibration on the servo motor.

6. The online Barcol hardness testing device for composite material pipes as described in claim 1, characterized in that, It also includes a cleaning assembly, which is disposed corresponding to the pressure needle. The cleaning assembly has a spray end facing the tip of the pressure needle for cleaning the tip of the pressure needle.

7. The online Barcol hardness testing device for composite material pipes as described in claim 6, characterized in that, The cleaning assembly includes a solvent tank, an infusion tube, and a nozzle. The solvent tank is fixed on the bracket, and the nozzle is fixed on the bracket and faces the tip of the pressure needle. One end of the infusion tube is connected to the solvent tank, and the other end of the infusion tube is connected to the nozzle. The infusion tube is equipped with an on / off infusion pump.

8. The online Barcol hardness testing device for composite material pipes as described in claim 7, characterized in that, The bracket is provided with a third fixed end and a fourth fixed end. The solvent tank is fixed on the third fixed end, the fourth fixed end is correspondingly arranged with the second fixed end, and the nozzle is fixed on the fourth fixed end.

9. A method for online detection of Barcol hardness in composite material pipes, applicable to the online Barcol hardness detection device for composite material pipes as described in any one of claims 1-8, characterized in that, Includes the following steps: Install a Barcol online hardness testing device for composite material pipes; The sensor data of the Barcol online hardness testing device are calibrated; The tested item was tested using the calibrated Barcol hardness online testing device; The Barcol hardness of the tested item is calculated based on the test results.

10. The method for online testing of Barcol hardness in composite material pipes as described in claim 9, characterized in that, The calibration of the sensor data of the online Barcol hardness testing device for composite material pipes includes: Composite material pipe samples with different degrees of curing were prepared; The same area of ​​composite pipe samples with different degrees of curing was measured simultaneously using a Barcol online hardness testing device for composite pipes and a standard Barcol hardness tester. Data such as the hardness value HBa, the indentation depth Δl of the line detection device, and the pressure magnitude of the composite material pipe samples with different curing degrees were obtained at the same point. The relationship between the hardness value HBa and the depth Δl and the magnitude of the pressure was fitted to form a formula.

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