CN216955755U - Active excitation infrared thermal imaging building carbon fiber reinforcement nondestructive testing system - Google Patents

Abstract

The utility model discloses an active excitation infrared thermal imaging building carbon fiber reinforcement nondestructive testing system which mainly comprises an excitation source, an infrared thermal imager, a temperature sensor, a controller and a computer and works through an automatic temperature control system. The excitation source and the thermal infrared imager are arranged on the same side of the structure to be detected, one of the temperature sensors is arranged on the surface of a detection area of the structure to be detected, and the other temperature sensor is arranged in the surrounding environment of the structure to be detected. The system is simple in structure and high in accuracy, the trigger temperature difference value is preset during working, the starting and stopping of the excitation source are controlled by comparing the temperature difference value of the surface of the detection area of the structure to be detected and the surrounding environment with the preset trigger temperature difference value, the identification degree of the test is improved, the consistency of the surface temperature of the same building carbon fiber reinforcement project and multiple detection points (or the same detection point and different detection areas) is ensured, the accuracy of the system for testing the defect part is improved, and reliable data support is provided for transverse contrastive analysis of the detection result.

Description

An Active Excitation Infrared Thermal Imaging Building Carbon Fiber Reinforced Nondestructive Testing System

technical field

The utility model relates to the technical field of engineering detection, in particular to an active excitation infrared thermal imaging nondestructive detection system suitable for building carbon fiber reinforcement engineering.

Background technique

The construction process of carbon fiber reinforcement technology is simple, the construction period is short, and the efficiency is high. The material itself has high relative strength and light weight. There is almost no external pressure during the reinforcement process, and the original structure is hardly damaged. It can be used for flexural and shear reinforcement of concrete structures, and it is widely used in various industrial and civil buildings and structures for earthquake-proof, crack-proof and anti-corrosion reinforcement. Carbon fiber reinforcement technology saves time and effort, saves space, and has a good reinforcement effect. It can not only improve the service life of buildings, but also reduce the cost of reinforcement of buildings, and has broad application prospects.

Traditionally, the sticking quality of carbon fiber reinforcement is generally detected by hammering. By hammering every inch of carbon fiber cloth, it can detect whether there is a hollow between the carbon fiber cloth and the structure, so as to detect the degree of fit between the carbon fiber cloth and the structure. . Although this method is simple, it has a large workload, is easy to miss inspection, and is easy to cause damage to the structure.

Compared with the traditional detection technology, the non-contact, fast response, high precision and large detection range of infrared thermal imaging non-destructive testing technology has been widely used. Among them, the infrared thermal imaging non-destructive testing technology based on active excitation increases the radiation difference between the surface of the detection area and the surrounding environment by increasing the radiation level of the detection area, so as to obtain a heat map with more obvious temperature difference and improve the detection accuracy. At present, the commonly used active excitation infrared thermal imaging nondestructive testing systems or devices mostly achieve the purpose of increasing the radiation difference between the detection area and the surrounding environment by controlling the working time of the excitation source. Considering the factors such as large space, many detection points, and many detection areas of the same detection point, the test recognition degree of the above method is difficult to grasp, and it cannot guarantee the same building carbon fiber reinforcement project, multiple detection points (or The consistency of the surface temperature of the same detection point, different detection areas) is not conducive to the lateral comparative analysis of the detection results.

Utility model content

In order to solve the above problems, the utility model provides an active excitation infrared thermal imaging building carbon fiber reinforcement nondestructive testing system based on temperature control.

To achieve the above object, the utility model provides the following technical solutions:

An active excitation infrared thermal imaging building carbon fiber reinforcement nondestructive testing system is mainly composed of an excitation source, an infrared thermal imaging camera, a temperature sensor, a controller and a computer.

The excitation source is preferably one of halogen lamp excitation, laser excitation or ultrasonic excitation; one excitation source can be used in one detection process, or multiple excitation sources can be used as needed, and the excitation methods and structures of the multiple excitation sources can be used. , functions, etc. are exactly the same.

The infrared thermal imager and the excitation source are arranged on the same side of the structure to be detected, collect the temperature field changes on the surface of the detection area of the structure to be detected in real time, acquire a sequence of heat maps and transmit them to the computer in turn.

The temperature sensors include two types: one is a patch-type temperature sensor installed on the surface of the detection area of the structure to be detected, and the surface temperature of the detection area is collected in real time; ambient temperature. Both of the two temperature sensors can be a single temperature sensor, or can be expanded into a temperature sensor array according to the actual detection situation.

The controller is respectively connected with the excitation source, the infrared thermal imager and the temperature sensor through the circuit, and triggers the start and stop of the excitation source and the infrared thermal imager by comparing the temperature difference between the surface of the detection area and the surrounding environment and the preset trigger temperature difference value; It is connected to the computer through a bus, and the acquired temperature of the surface of the detection area and the surrounding environment is transmitted to the computer for record keeping.

The computer is respectively connected to the controller and the infrared thermal imager through a bus, receives the temperature data of the surface of the detection area and the surrounding environment uploaded by the controller and the heat map sequence uploaded by the infrared thermal imager, records and saves, and analyzes the obtained thermal image. The image sequence is processed and analyzed to obtain detailed information such as hollow drums in the inspection area, and realize non-contact non-destructive inspection of the structure to be inspected.

The positive effects of the present utility model are:

1. The active excitation infrared thermal imaging building carbon fiber reinforcement non-destructive testing system, based on temperature control, improves test recognition, ensures accuracy, and realizes the same building carbon fiber reinforcement project, multiple detection points (or the same detection point, different detection The purpose of the surface temperature consistency is to facilitate the lateral comparative analysis of the detection results.

2. The active excitation infrared thermal imaging building carbon fiber reinforced nondestructive testing system has simple structure and strong expansibility. The excitation source and temperature sensor can be expanded into excitation source array and temperature sensor array, and the data transmission mode can be expanded into wireless data transmission.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and are intended to be used for explaining The present invention should not be construed as a limitation of the present invention.

As shown in FIG. 1 , the active excitation infrared thermal imaging building carbon fiber reinforced nondestructive testing system provided by the present invention is mainly composed of an excitation source 1 , an infrared thermal imaging camera 2 , a temperature sensor, a controller 3 and a computer 4 .

The excitation source 1 is used to improve the radiation level of the surface of the detection area of the structure 7 to be detected, thereby increasing the radiation difference between it and the surrounding environment. The structure 7 detects changes in the temperature field on the surface of the area, acquires a sequence of heat maps and transmits them to the computer 4 in sequence. The temperature sensor includes a first temperature sensor 5 (or a first temperature sensor array 5) installed on the surface of the detection area of the structure to be inspected 7 and a second temperature sensor 6 (or a second temperature sensor array) installed in the surrounding environment of the structure to be inspected 7. 6) Two kinds.

The controller 3 is connected to the excitation source 1 , the infrared thermal imager 2 , the first temperature sensor 5 and the second temperature sensor 6 through lines, and is connected to the computer 4 through a bus. The controller 3 triggers the start and stop of the excitation source 1 and the infrared thermal imager 2 by comparing the temperature difference between the surface of the detection area of the structure to be detected 7 and the surrounding environment, and transmits the acquired temperature data of the surface of the detection area and the surrounding environment to the computer 4 for processing. record keeping.

The computer 4 is connected to the infrared thermal imager 2 through the bus mode, receives the heat map sequence uploaded by the infrared thermal imager 2, records and saves it, and processes and analyzes the obtained heat map sequence, thereby obtaining the inner empty space of the detection area of the structure to be detected 7. Drum and other detailed information to achieve non-contact non-destructive testing of the structure 7 to be tested.

When working, start the computer 4 and the controller 3, preset the trigger temperature difference value, the controller 3 starts the excitation source 1, the infrared thermal imager 2, the first temperature sensor 5 and the second temperature sensor 6, and the excitation source 1 sends out an excitation signal, The infrared thermal imager 2 collects the change of the surface temperature field in the detection area of the structure to be detected 7 and transmits it to the computer 4, while the first temperature sensor 5 collects the surface temperature of the detection area of the structure to be detected 7, and the second temperature sensor 6 collects the ambient temperature; Calculate and compare whether the temperature difference between the surface of the detection area and the surrounding environment reaches the preset trigger temperature difference, if so, the controller 3 controls the excitation source 1, the infrared thermal imager 2, the first temperature sensor 5 and the second temperature sensor 6 to stop working; Finally, the computer 4 processes and analyzes the obtained heat map sequence. After the inspection of this area is completed, move the device to the next inspection area, and repeat the above operation until the carbon fiber reinforcement inspection of the entire building is completed.

The utility model has the advantages of simple structure, high accuracy and strong expansibility, and works through an automatic temperature control system, so that the surface temperature of the same building carbon fiber reinforcement project and multiple detection points (or the same detection point and different detection areas) can be achieved. Consistency improves the recognition of the test and the accuracy of the system's testing of defective parts, and facilitates the horizontal comparative analysis of the test results.

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. , it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (6)

1. An active excitation infrared thermal imaging building carbon fiber reinforcement non-destructive testing system, characterized in that: comprising an excitation source (1), an infrared thermal imager (2), a controller (3) and a computer (4); The controller (3) is electrically connected with a first temperature sensor (5) and a second temperature sensor (6), the first temperature sensor (5) is installed on the surface of the detection area of the structure to be detected (7), the The second temperature sensor (6) is installed in the surrounding environment of the structure (7) to be detected. 2 . An active excitation infrared thermal imaging building carbon fiber reinforced nondestructive testing system according to claim 1 , wherein the excitation source ( 1 ) is selected from one of halogen lamp excitation, laser excitation or ultrasonic excitation. 3 . 3. An active excitation infrared thermal imaging building carbon fiber reinforced nondestructive testing system according to claim 1, characterized in that: the controller (3) communicates with the excitation source (1), the infrared thermal imager (2), The first temperature sensor (5) is connected with the second temperature sensor (6), and is connected with the computer (4) by means of a bus. 4. An active excitation infrared thermal imaging building carbon fiber reinforced nondestructive testing system according to claim 3, characterized in that: the infrared thermal imaging camera (2) is connected to the computer (4) through a bus. 5. An active excitation infrared thermal imaging building carbon fiber reinforced nondestructive testing system according to claim 1, characterized in that: the infrared thermal imaging camera (2) and the excitation source (1) are arranged on the side of the structure to be detected (7). same side. 6. An active excitation infrared thermal imaging building carbon fiber reinforced nondestructive testing system according to claim 1, characterized in that: the first temperature sensor (5) is a single sensor or a first temperature sensor array, and the second temperature sensor (5) is a single sensor or a first temperature sensor array. The sensor (6) is a single sensor or a second array of temperature sensors.

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