CN211825803U

CN211825803U - Device for detecting debonding defect inside engine blade by scanning halogen lamp

Info

Publication number: CN211825803U
Application number: CN202020568245.5U
Authority: CN
Inventors: 刘玉波; 张宏顺; 张思思; 王程; 唐庆菊
Original assignee: Heilongjiang University of Science and Technology
Current assignee: Heilongjiang University of Science and Technology
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-10-30
Anticipated expiration: 2030-04-16

Abstract

The utility model relates to a scanning formula halogen lamp detects device of the inside debonding defect of engine blade. At present, the performance of the engine blade of the space shuttle directly influences the performance of the shuttle, and the defects of internal debonding, surface cracks and the like are easily generated when the engine blade is used in a high-temperature high-pressure high-strength environment for a long time. A device for detecting debonding defects inside engine blades by using a scanning halogen lamp comprises the following components: the thermal excitation system comprises a data acquisition card (28), a light modulator (26), a halogen lamp, a concave lens (19) and a convex lens (18), wherein the input end of the data acquisition card is connected with the output end of a computer, the output end of the data acquisition card is connected with the input end of the light modulator, and the output end of the light modulator is connected with the input end of the halogen lamp. The utility model discloses be applied to infrared thermal wave nondestructive test field, be applied to the aerospace field simultaneously.

Description

Device for detecting debonding defect inside engine blade by scanning halogen lamp

The technical field is as follows:

the utility model relates to a scanning formula halogen lamp detects device of the inside debonding defect of engine blade.

Background art:

in recent years, with the rapid development of aerospace industry, the engine blade of a space shuttle becomes more important, the performance of the engine blade directly influences the performance of the shuttle, the engine blade is very easy to generate defects such as internal debonding and surface cracks when being used in a high-temperature, high-pressure and high-strength environment for a long time, and if the engine blade cannot be detected in time, the flight safety of the space shuttle is influenced, even flight accidents are caused, and serious economic loss is caused. The effective detection of the structure and performance of the engine blade has become a research hotspot in all countries around the world. The engine blade is of an irregular curved surface structure, and a good detection effect is difficult to obtain by conventional nondestructive detection, so that certain challenge is brought to the nondestructive detection of the engine blade.

The utility model has the following contents:

the utility model aims at providing a scanning formula halogen lamp detects device and detection method of the inside debonding defect of engine blade mainly is applicable to infrared thermal wave nondestructive test field, is applied to the aerospace field simultaneously, concretely relates to scanning formula halogen lamp detects device of the inside debonding defect of engine blade.

The above purpose is realized by the following technical scheme:

a device for detecting debonding defects inside engine blades by using a scanning halogen lamp comprises the following components: thermal excitation system, imaging system, test piece scanning system and image processing and analytic system, thermal excitation system in by data acquisition card, light modulator, halogen lamp, concave lens, convex lens constitute, wherein the halogen lamp includes first halogen lamp and second halogen lamp, the data acquisition card input link to each other with the computer output, data acquisition card output link to each other with the light modulator input, the light modulator output link to each other with the halogen lamp input, the light beam that the halogen lamp produced, after the refraction through convex lens after the reflection of concave lens, can produce 2 mm's simulation laser spot with the light gathering in the surface department of engine blade.

The device for detecting the debonding defect inside the engine blade by the scanning halogen lamp is characterized in that the imaging system consists of a computer and a thermal infrared imager, the input end of the thermal infrared imager is connected with the output end of the computer through a twisted pair, the output end of the computer is completely in communication connection with the input end of the thermal infrared imager, and the computer triggers the thermal infrared imager to collect the surface temperature of the engine blade and transmits the temperature data to the computer through the twisted pair.

The device for detecting the debonding defect inside the engine blade by the scanning halogen lamp is characterized in that a test piece scanning system comprises a controller, a motor driver, a power amplifier, an alternating current motor, an input shaft, an output shaft, a first straight cylindrical gear, a second straight cylindrical gear, a speed reducer, a test piece clamp and a lifter, wherein the input shaft is connected with the alternating current motor, the input shaft drives the first straight cylindrical gear to rotate, the first straight cylindrical gear is meshed with the second straight cylindrical gear, and the second straight cylindrical gear drives the output shaft to rotate.

According to the device for detecting the debonding defect in the engine blade by the scanning halogen lamp, a tested piece rotates under the rotation of the output shaft and the speed reducer, the tested piece is placed on the test piece clamp, and the tested piece ascends or descends under the action of the lifter.

The device for detecting the debonding defect inside the engine blade by the scanning halogen lamp is characterized in that the image processing and analyzing system is mainly used for completing main functions by a computer, and the computer is mainly used for setting the waveform, pulse width and power of a pulse signal, the working and stopping instructions of an alternating current motor, the state of a lifter and the sampling time, sampling frequency and picture frame number of an infrared thermal imager and triggering the collection of the infrared thermal imager.

The utility model has the advantages that:

1. the utility model discloses the reflection principle of light on concave lens can know, and the nature of focusing to another focus can produce a focus light beam, simulation laser excitation facula when light is sent from a focus. The utility model discloses in adopt array halogen lamp to produce the focus light beam, through convex lens's effect, will focus in the light beam concentrates on the local very little region. Under the effect through concave lens and convex lens, can concentrate on the test piece surface of engine blade with the light beam that two halogen lamps generated alone, the simulation laser facula, the rotation of motor drives engine blade through drive mechanism's effect and rotates, can carry out the detection of all-round scanning formula to engine blade, and two halogen lamps can be controlled alone simultaneously. The utility model discloses have the local concentrated heating's of laser function concurrently to there are low cost, safer advantage.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1: computer, 2: first conductive line, 3: controller, 4: second conductive line, 5: motor driver, 6: third conductive line, 7: power amplifier, 8: fourth conductive line, 9: alternating current motor, 10: input shaft, 11: first right circular cylindrical gear, 12: second right circular cylindrical gear, 13: output shaft, 14: speed reducer, 15: fifth wire, 16: lifter, 17: first halogen lamp, 18: convex lens, 19: concave lens, 20: second halogen lamp, 21: sixth conductive line, 22: test piece, 23: specimen holder, 24: thermal infrared imager, 25: seventh conductive line 26: dimmer, 27: eighth conductive line, 28: data acquisition card, 29: ninth wire, 30: a twisted pair.

The specific implementation mode is as follows:

example 1:

the technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and all modifications or equivalent replacements of the technical solution of the present invention are included in the protection scope of the present invention without departing from the spirit and scope of the technical solution of the present invention.

Referring to fig. 1, the embodiment of the present invention: the embodiment provides a device and a method for detecting debonding defects inside an engine blade by using a scanning halogen lamp, as shown in fig. 1, the device comprises: thermal excitation system, imaging system, test piece scanning system, image processing and analysis system.

The thermal excitation device comprises a first halogen lamp 17, a convex lens 18, a concave lens 19, a second halogen lamp 20, a dimmer 26 and a data acquisition card 28. The thermal excitation source is a light beam generated by a halogen lamp alone. The first halogen lamp 17 and the second halogen lamp 20 are placed 40 to 50cm, preferably 50cm, in front of the left and right of the concave lens 19. The convex lens 18 is placed 10-20cm, preferably 15cm, directly in front of the middle of the concave lens 19. The tested piece 22 is arranged right opposite to the thermal infrared imager 24, and the tested piece 22 is arranged 5-10cm, preferably 5cm, right in front of the liquid convex lens 18. The halogen lamp is used for heating so that the heat of the light beam is transferred to the surface of the test piece 22.

The imaging system consists of a thermal infrared imager 24 and a computer 1, wherein the thermal infrared imager 24 can collect infrared rays emitted by the tested piece 22 and can not be seen by human eyes, and the infrared rays are converted into a visible infrared image sequence. The thermal infrared imager 25 is fixed right in front of the tested piece 22, so that the front-back distance between the tested piece 22 and the lens of the thermal infrared imager 24 is kept between 30cm and 50cm, preferably 50 cm. The input of the infrared thermal image 24 is connected to the output of the computer 1 via a twisted pair 30.

The test piece scanning system is composed of a controller 3, a motor driver 5, a power amplifier 7, an alternating current motor 9, an input shaft 10, a first right circular cylinder gear 11, a second right circular cylinder gear 12, an output shaft 13, a speed reducer 14, a lifter 16 and a test piece clamp 23. The controller 3 controls the motor to start and stop. The motor driver 5 controls the motor to rotate and adjust the rotating speed. The power amplifier 7 adjusts the power of the engine and improves the working efficiency. The input shaft 10 is connected with the alternating current motor 9, the input shaft 10 drives the first right circular cylindrical gear 11 to rotate, the first right circular cylindrical gear 11 is meshed with the second right circular cylindrical gear 12, and the second right circular cylindrical gear 12 drives the output shaft 13 to rotate. The test piece 22 is rotated by the rotation of the output shaft 13 and the reduction gear 14. The specimen 22 is placed on the specimen holder 23, and the specimen 22 is raised or lowered by the elevator 16.

The image processing and analyzing system is mainly used for completing the functions by a computer 1; the computer 1 is mainly used for setting the waveform, pulse width and power of the pulse signal, the instructions for the operation and stop of the alternating current motor 9, the state of the lifter 16, the sampling time, sampling frequency and picture frame number of the thermal infrared imager 24 and triggering the acquisition of the thermal infrared imager 24. And meanwhile, the system is used for receiving original data collected by the thermal infrared imager 24, processing images, comparing and analyzing the data, removing noise and interference, and controlling the rotation of a motor and the working state of the elevator.

Example 2:

the embodiment provides a device and a method for detecting debonding defects inside engine blades by using a scanning halogen lamp, and the method comprises the following specific implementation steps:

the first step is as follows: the respective components of the apparatus according to the first embodiment are sequentially placed, the laboratory bench is constructed, and the first halogen lamp 17 and the second halogen lamp 20 are adjusted in position so that the concave lens 19 is 40 to 50cm in front of the left side of the first halogen lamp 17 and 40 to 50cm in front of the right side of the second halogen lamp 20, preferably 50 cm. The positions of the convex lens 18 and the concave lens 19 are adjusted, the convex lens 18 is 10-20cm in front of the middle of the concave lens 19, and the 15cm. tested piece 22 is preferably 5-10cm in front of the liquid convex lens 18. Preferably 5cm.

The second step is that: and adjusting the position of the thermal infrared imager 24 to keep the front-back distance between the position of the tested piece 22 and the lens of the thermal infrared imager 24 between 30cm and 50cm, preferably 50 cm.

The third step: the tested piece 22 is placed on the test piece clamp 23, and the central position of the tested piece 22 is located at the same height position as the lens of the thermal infrared imager 24.

The fourth step: the thermal infrared imager 24 is turned on and the focal length is adjusted so that a clear thermal infrared image of the tested object 22 is displayed on the display screen of the computer 19.

The fifth step: the circuit was connected in turn and the power was switched on, starting the experimental set-up, as shown in figure 1.

And a sixth step: the first halogen lamp 17 and the second halogen lamp 20 are preheated, and after the preheating, the first halogen lamp 17 and the second halogen lamp 20 are turned on, so that the reflection on the concave lens 19 forms a simulated laser spot with a diameter of 4mm on the surface of the engine blade after the refraction by the convex lens 18.

The seventh step: the computer 1 is operated to operate the ac motor 9 to drive the first spur gear 11 and the second spur gear 12. The test piece 22 is rotated by the rotation of the output shaft 13 and the reduction gear 14 and is raised or lowered by the lifter 16.

Eighth step: after the thermal excitation and the rotational scanning are finished, the thermal infrared imager 24 collects the image data of the tested piece 22 and transmits the image data to the computer 1 for data processing.

Claims

1. A device for detecting debonding defects inside engine blades by using a scanning halogen lamp comprises the following components: thermal excitation system, imaging system, test piece scanning system and image processing and analysis system, characterized by: the thermal excitation system comprises a data acquisition card, a light modulator, a halogen lamp, a concave lens and a convex lens, wherein the halogen lamp comprises a first halogen lamp and a second halogen lamp, the input end of the data acquisition card is connected with the output end of a computer, the output end of the data acquisition card is connected with the input end of the light modulator, the output end of the light modulator is connected with the input end of the halogen lamp, and light beams generated by the halogen lamp can be focused on the surface of the engine blade to generate 2mm simulated laser spots after being reflected by the concave lens and refracted by the convex lens.

2. The apparatus for detecting debonding defects inside an engine blade by using a scanning halogen lamp as claimed in claim 1, wherein: the imaging system is composed of a computer and a thermal infrared imager, wherein the input end of the thermal infrared imager is connected with the output end of the computer through a twisted pair, the output end of the computer is in complete communication connection with the input end of the thermal infrared imager, and the computer triggers the thermal infrared imager to collect the surface temperature of the engine blade and transmits the temperature data to the computer through the twisted pair.

3. The apparatus for detecting debonding defects inside an engine blade by using a scanning halogen lamp as claimed in claim 2, wherein: the test piece scanning system comprises a controller, a motor driver, a power amplifier, an alternating current motor, an input shaft, an output shaft, a first right circular cylinder gear, a second circular cylinder gear, a speed reducer, a test piece clamp and a lifter, wherein the input shaft is connected with the alternating current motor and drives the first right circular cylinder gear to rotate, the first right circular cylinder gear is meshed with the second right circular cylinder gear, and the second right circular cylinder gear drives the output shaft to rotate.

4. The apparatus for detecting debonding defects inside an engine blade by using a scanning halogen lamp as claimed in claim 3, wherein: the tested piece rotates under the rotation of the output shaft and the speed reducer, the tested piece is placed on the test piece clamp, and the tested piece rises or falls under the action of the lifter.

5. The apparatus for detecting debonding defects inside an engine blade by using a scanning halogen lamp as claimed in claim 4, wherein: the image processing and analyzing system is mainly used for setting the waveform, pulse width and power of a pulse signal, instructions for working and stopping the alternating current motor, the state of the lifter and the sampling time, sampling frequency and picture frame number of the thermal infrared imager and triggering the acquisition of the thermal infrared imager.