阅读说明：本技术 一种基于视觉识别的绝缘材料热老化试验装置及试验方法 (Insulation material thermal aging test device and test method based on visual identification ) 是由 方振邦 骆星智 叶飞 王勇 邢明军 陈国宏 缪春辉 张洁 赵骞 滕越 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种基于视觉识别的绝缘材料热老化试验装置,涉及热延伸试验技术领域,包括装置本体、摄像识别系统、试样夹持部件；所述装置本体包括基座和位于基座上的支架,所述摄像系统包括摄像系统和识别系统,所述试样夹持部件安装在支架上,所述摄像系统设置在基座上且正对着所述试样夹持部件,所述识别系统集成在所述基座内,所述识别系统与摄像系统通信连接。本发明能够在高温条件下通过摄像头对试样进行拍照,将图形信息通过处理芯片和缓存芯片进行图片模型比对,获取试样伸长长度数据后,传输至远程服务器,避免了检测人员高温操作风险,提高了检测的精度。(The invention discloses an insulating material thermal aging test device based on visual identification, which relates to the technical field of thermal extension tests and comprises a device body, a camera identification system and a sample clamping component, wherein the camera identification system is arranged on the device body; the device body comprises a base and a support positioned on the base, the camera system comprises a camera system and an identification system, the sample clamping component is installed on the support, the camera system is arranged on the base and faces the sample clamping component, the identification system is integrated in the base, and the identification system is in communication connection with the camera system. The invention can shoot the sample through the camera under the high temperature condition, compare the image information with the image model through the processing chip and the cache chip, and transmit the data to the remote server after acquiring the elongation length data of the sample, thereby avoiding the high temperature operation risk of the detection personnel and improving the detection precision.)

1. A thermal aging test device for an insulating material based on visual identification is characterized by comprising a device body, a camera identification system and a sample clamping component; the device body comprises a base (1) and a support (2) located on the base (1), the camera system comprises a camera system and an identification system, the sample clamping component is installed on the support (2), the camera system is arranged on the base (1) and faces the sample clamping component, the identification system is integrated in the base (1), and the identification system is in communication connection with the camera system.

2. The insulation material thermal aging test device based on visual identification according to claim 1, wherein the camera system comprises a thermal insulation layer, and a high temperature resistant camera (3) and a light source compensation module (4) which are arranged in the thermal insulation layer; the identification system comprises a power supply (5), a processing module (6), a cache module (7), a storage module (8) and a WiFi output module (9), the signal output end of the high-temperature-resistant camera (3) is connected with the signal input end of the cache module (7), the signal output end of the cache module (7) and the storage module (8) is connected with the signal input end of the processing module (6), the processing module (6) is connected with the WiFi output module (9) in a two-way communication mode, the signal output end of the processing module (6) is connected with a light source compensation module (4), and the processing module (6) is electrically connected with the power supply module (5).

3. The insulation material thermal aging test device based on visual identification according to claim 2, wherein the sample holding member comprises an upper chuck (10) and a lower chuck (11), the upper chuck (10) is fixed on the bracket (2), and the upper chuck (10) and the lower chuck (11) are respectively used for holding the upper end and the lower end of the sample to be tested.

4. The insulation material thermal aging test device based on visual identification according to claim 3, wherein a weight (12) is connected to the lower end of the lower chuck (11).

5. A test method based on the insulation material thermal aging test device based on visual identification according to any one of claims 1 to 4, characterized by comprising the following steps:

(1) marking two marking lines in the middle of a sample to be detected, wherein the distance between the lines is h and the unit is mm; connecting a sample to be tested with the top of the bracket (2) through an upper chuck (10), connecting a lower chuck (11) with a weight (12), and calculating the weight of the weight according to GB/T2921.21;

(2) starting the oven to a specified temperature;

(3) starting a power supply module (5) of the camera shooting recognition system, starting a processing module (6) to further start, starting timing by a time relay, setting the time relay to be 5-10min, sending the test device into an oven, and controlling the camera shooting recognition system to enter a dormant state by the processing module;

(4) the timing of the time relay is stopped, the processing module wakes up the camera identification system, the light source compensation module (4) is turned on, and the high-temperature resistant camera (3) starts to collect the distance between the marking lines of the sample to be detected;

(5) the high-temperature resistant camera (3) stores the acquired image information into the cache module (7), the processing module (6) reads the image information after receiving an instruction that the image of the cache module (7) is stored, and after the processing module (6) reads the image information, the processing module calls an image model in the storage module (8) to compare the image information to obtain the distance data between the marked lines of the sample to be detected;

(6) the processing module (6) opens the wifi output module (9), the obtained data are sent to the wifi output module (9) through the serial port, the wifi output module (9) sends the data to the terminal server, and the extension condition of the to-be-detected sample under the conditions of high temperature and load is obtained;

(7) after the processing module (6) receives the signal fed back by the wifi output module (9) and finishes sending, the camera shooting recognition system is controlled to sleep; otherwise, the processing module (6) controls the camera shooting recognition system to continue waiting;

(8) opening the oven, cutting off the sample to be tested at the lower chuck (11), and keeping the sample to be tested in the oven for 3-5 min; and then taking out the test device from the oven, cooling to room temperature, taking down the sample to be tested, measuring the distance between the marked lines again, and obtaining the extension condition of the sample to be tested under the cooling condition.

Technical Field

The invention relates to the technical field of thermal extension tests, in particular to an insulating material thermal aging test device and a test method based on visual identification.

Background

The thermosetting crosslinked polyethylene material is widely applied to various power equipment as an insulating material, such as power cables, overhead insulated conductors, transformers and the like, and after the insulating material is used for a long time, the insulating material can be aged and damaged under the influence of current heating and external environmental factors, so that the safe and stable operation of a power system is influenced. The thermal aging performance of the insulating material is usually indirectly measured by the technical parameter of 'thermal elongation', the test simulates the change of elongation of the material after short-time thermal aging under the conditions of high temperature and load to show the plasticity and permanent deformability of the material, and if the deformation exceeds the standard value under the conditions of load and heat, the performance of the insulating material can be damaged, and equipment failure can be caused in severe cases.

The thermal extension test needs to prepare an insulating material into a dumbbell sample and then measure the elongation of the dumbbell sample under high temperature and load conditions, the existing method mainly depends on manual work to extend a steel ruler into an oven or measure the elongation of the dumbbell sample outside an observation window under the high temperature condition, the test process depends on manual operation, and the detection safety and precision are low.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides an insulating material thermal aging test device and a test method based on visual identification.

The technical scheme adopted by the invention is as follows:

a thermal aging test device for an insulating material based on visual identification is characterized by comprising a device body, a camera identification system and a sample clamping component; the device body comprises a base and a support positioned on the base, the camera system comprises a camera system and an identification system, the sample clamping component is installed on the support, the camera system is arranged on the base and faces the sample clamping component, the identification system is integrated in the base, and the identification system is in communication connection with the camera system.

Further, the insulation material thermal aging test device based on visual identification is characterized in that the camera system comprises a thermal insulation layer, a high temperature resistant camera and a light source compensation module, wherein the high temperature resistant camera and the light source compensation module are arranged in the thermal insulation layer; the identification system comprises a power supply, a processing module, a cache module, a storage module and a WiFi output module, wherein the signal output end of the high-temperature resistant camera is connected with the signal input end of the cache module, the signal output end of the cache module and the signal output end of the storage module are connected with the signal input end of the processing module, the processing module is in two-way communication connection with the WiFi output module, the signal output end of the processing module is connected with the light source compensation module, and the processing module is electrically connected with the power supply module.

Further, the insulation material thermal aging test device based on visual identification is characterized in that the sample clamping component comprises an upper chuck and a lower chuck, the upper chuck and the lower chuck are respectively used for clamping the upper end and the lower end of a sample to be tested on a bracket fixed by the upper chuck.

Further, the insulation material thermal aging test device based on visual identification is characterized in that the lower end of the lower chuck is connected with a weight.

A thermal aging test method of an insulating material based on visual identification is characterized by comprising the following steps:

(1) marking two marking lines in the middle of a sample to be detected, wherein the distance between the lines is h and the unit is mm; connecting a sample to be tested with the top of the bracket through an upper chuck, connecting a lower chuck with a weight, and calculating the weight of the weight according to GB/T2921.21;

(2) starting the oven to a specified temperature;

(3) starting a power supply module of the camera shooting recognition system, starting a processing module, starting timing by a time relay, setting the time relay to be 5-10min, sending the test device into an oven, and controlling the camera shooting recognition system to enter a dormant state by the processing module;

(4) the timing of the time relay is stopped, the processing module wakes up the camera identification system, the light source compensation module is opened, and the high-temperature resistant camera starts to collect the distance between the marking lines of the sample to be detected;

(5) the high-temperature resistant camera stores the acquired image information into the cache module, the processing module reads the image information after receiving an instruction stored in the image of the cache module, and the processing module calls an image model in the storage module to compare the image information after reading the image information to obtain distance data between the marked lines of the sample to be tested;

(6) the processing module opens the wifi output module, the obtained data are sent to the wifi output module through the serial port, the wifi output module sends the data to the terminal server, and the extension condition of the to-be-detected sample under the conditions of high temperature and load is obtained;

(7) after the processing module receives the signal fed back by the wifi output module and finishes sending, controlling the camera shooting recognition system to sleep; otherwise, the processing module controls the camera shooting recognition system to continue waiting;

(8) opening the oven, cutting off the sample to be tested at the lower chuck, and keeping the sample to be tested in the oven for 3-5 min; and then taking out the test device from the oven, cooling to room temperature, taking down the sample to be tested, measuring the distance between the marked lines again, and obtaining the extension condition of the sample to be tested under the cooling condition.

The invention has the advantages that:

the invention can shoot the sample through the camera under the high temperature condition, compare the image information with the image model through the processing chip and the cache chip, and transmit the data to the remote server after acquiring the elongation length data of the sample, thereby avoiding the high temperature operation risk of the detection personnel and improving the detection precision.

The invention adopts the No. 5 battery as the power supply of the camera shooting identification system, avoids the external power supply, the camera shooting identification system is provided with a heat insulation layer, the highest operation temperature can reach 300 ℃, the processing module is provided with a storage module and a cache module, and the processing speed and the storage capacity of the system are improved.

According to the invention, the processing module transmits the numerical value after identifying the shot picture without transmitting the whole picture, so that the transmission efficiency is improved; aiming at the condition of poor sight line in the oven, the invention is provided with light source compensation, thereby improving the photographing quality.

Drawings

Fig. 1 is a schematic structural diagram of an insulation material thermal aging test device based on visual identification according to the present invention.

Fig. 2 is a schematic block diagram of the camera recognition system of the present invention.

In the figure: the device comprises a base 1, a support 2, a high-temperature-resistant camera 3, a light source supplementing module 4, a power module 5, a processing module 6, a cache module 7, a storage module 8, a WiFi output module 9, an upper chuck 10, a lower chuck 11, weights 12 and a dumbbell sample 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1: taking dumbbell test specimens as an example.

A thermal aging test device for an insulating material based on visual identification comprises a device body, a camera identification system and a sample clamping component; the device body includes base 1 and the support 2 that is located on the base 1, and camera system includes camera system and identification system, and sample clamping member installs on support 2, and camera system sets up on base 1 and just faces sample clamping member, and identification system is integrated in base 1, and identification system and camera system communication are connected.

The camera system comprises a heat insulation layer, a high temperature resistant camera 3 and a light source compensation module 4, wherein the high temperature resistant camera 3 and the light source compensation module are arranged in the heat insulation layer; the identification system comprises a power supply 5, a processing module 6, a cache module 7, a storage module 8 and a WiFi output module 9, the signal output end of the high-temperature resistant camera 3 is connected with the signal input end of the cache module 7, the signal output ends of the cache module 7 and the storage module 8 are connected with the signal input end of the processing module 6, the processing module 6 is connected with the WiFi output module 9 in a panic communication mode, the signal output end of the processing module 6 is connected with a light source compensation module 4, and the processing module 6 is electrically connected with the power supply module 5.

The sample clamping component comprises an upper clamping head 10 and a lower clamping head 11, wherein the upper clamping head 10 is fixed on the bracket 2, and the upper clamping head 10 and the lower clamping head 11 are respectively used for clamping the upper end and the lower end of a dumbbell sample 13.

The lower end of the lower chuck 11 is connected with a weight 12.

A thermal aging test method of an insulating material based on visual identification comprises the following steps:

(1) marking two marking lines in the middle of the dumbbell sample 13, wherein the line-to-line distance is h, the unit is mm, and the value of h is 20 mm; connecting the dumbbell test sample with the top of the bracket 2 through an upper chuck 10, connecting a lower chuck 11 with a weight 12, and calculating the weight of the weight according to GB/T2921.21;

(2) starting the oven to a specified temperature;

(3) starting a power module 5 of the camera shooting recognition system, starting a processing module 6, starting timing by a time relay, setting the time relay to be 10min, sending the test device into an oven, and controlling the camera shooting recognition system to enter a dormant state by the processing module;

(4) the time relay stops timing, the processing module wakes up the camera identification system, the light source compensation module 4 is turned on, and the high-temperature resistant camera 3 starts to collect the distance between the marked lines of the dumbbell sample;

(5) the high-temperature resistant camera 3 stores the acquired image information into the cache module 7, the processing module 6 reads the image information after receiving an instruction of the cache module 7 for storing the image information, and the processing module 6 calls an image model in the storage module 8 for comparison after reading the image information to acquire the distance data between the dumbbell sample marking lines;

(6) the processing module 6 opens the wifi output module 9, the obtained data are sent to the wifi output module 9 through the serial port, the wifi output module 9 sends the data to the terminal server, and the elongation condition of the dumbbell test sample under the conditions of high temperature and load is obtained;

(7) after the processing module 6 receives the signal fed back by the wifi output module 9 and finishes sending, controlling the camera shooting recognition system to sleep; otherwise, the processing module 6 controls the camera shooting recognition system to continue waiting;

(8) opening the oven, cutting off the dumbbell test sample at the lower chuck 11, and keeping the dumbbell test sample in the oven for 5 min; and then taking out the test device from the oven, cooling to room temperature, taking down the dumbbell test sample, measuring the distance between the marked lines again, and obtaining the elongation condition of the dumbbell test sample under the cooling condition.

In the embodiment, the power module 5 adopts a No. 5 battery, so that the portability of the device is improved, and an external power supply is avoided; the highest working temperature of the high-temperature resistant camera 3 reaches 300 ℃, and picture information can be transmitted to the processing module 6; the processing module 6 adopts a model matching algorithm to visually identify the image, and the storage module 8 is responsible for storing the required image model. The processing module 6 controls the power supply of the high-temperature resistant camera 3, the light source compensation module 4 and the WiFi output module 9 through the time relay, after the time relay reaches the set time, the processing module 6 starts the camera shooting recognition system 2, the WiFi output module 9 is connected with the processing module 6 through a feedback signal, and after the processing module 6 obtains a signal that the WiFi output module 9 finishes data transmission, the dormancy of the camera shooting recognition system is controlled.

The device is applied to the oven in a matched manner, is connected with a remote server, and transmits the extension length data of the insulating material at high temperature and under load by using a visual identification technology, so that the detection precision and safety are improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.