Effector ablation perforation time measurement device and method

Abstract

The application discloses an effector ablation perforation time measuring device and a measuring method, and solves the technical problems of high cost, difficult layout, easy interference and easy damage in the common measuring method for measuring the ablation perforation time in the effector ablation process; the first diffuse reflection plate and the second diffuse reflection plate are arranged in the annular cavity to form a diffuse reflection cavity, which can greatly reduce the number of photoelectric detectors required for measuring the ablation perforation time; for an effector with a diameter of 300 mm, the number of photoelectric detectors required for measuring the ablation perforation time is more than 200 according to the interval of 15 mm without using the diffuse reflection cavity, and only a few photoelectric detectors are needed after the diffuse reflection cavity is used, and the cost can be saved.

Description

Technical Field

[0001] This invention relates to an ablation time measuring device in an ablation experiment, specifically to an effect material ablation perforation time measuring device and method. Background Technology

[0002] In ablation experiments, the ablation perforation time is a crucial parameter. One approach is to use a high-speed camera to capture the ablation process and then analyze the video images frame by frame to determine the ablation perforation time. This method is relatively intuitive, but the camera images are easily affected by flames and smoke. Furthermore, when the application environment involves strong impacts and vibrations, the high-speed camera needs vibration isolation, increasing structural complexity. Additionally, high-speed cameras are expensive, increasing costs, and there is a risk of damage during ablation experiments. To prevent camera damage, the camera cannot be placed too close to the effector. In some confined spaces, the placement of the equipment becomes extremely difficult.

[0003] Another approach is to use photodetectors to detect the light intensity before and after the effector, and determine the ablation time by the transition edge of the light intensity signal. This method has a relatively compact structure, but because the effector area is relatively large (typically reaching 300mm in diameter) and the ablation location is uncertain, a relatively dense photodetector array must be used over a large area to accurately detect the signal. As the density of the photodetector array increases, the number of photodetectors used increases rapidly, significantly increasing costs. At the same time, the layout and wiring of the signal acquisition system becomes much more difficult, making the design extremely challenging. In addition, since the photodetector array is placed directly behind the effector, it is also highly susceptible to contamination or even damage, resulting in high maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems of high cost, difficult layout, susceptibility to interference, and easy damage to equipment in conventional measurement methods for measuring ablation perforation time during the ablation process of effect material, and to provide an effect material ablation perforation time measuring device and method.

[0005] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0006] A device for measuring the time of ablation and perforation of an effector, characterized in that it includes an annular cavity, a first diffuse reflection plate, a second diffuse reflection plate, an external photodetector, an internal photodetector, a photoelectric signal acquisition circuit board, an electrical connector, and a host computer.

[0007] An annular protrusion is provided in the middle of the inner wall of the annular cavity. The first diffuse reflection plate and the second diffuse reflection plate are respectively disposed in the annular cavity and are located at the front and rear ends of the annular protrusion to form a diffuse reflection cavity. The end where the first diffuse reflection plate is located is the front end, and the end where the second diffuse reflection plate is located is the rear end.

[0008] The annular cavity has a stepped hole with the larger end facing forward. The external photodetector is installed inside the larger end of the stepped hole and is connected to the photoelectric signal acquisition circuit board through a wire installed inside the smaller end of the stepped hole.

[0009] The first diffuse reflective plate has an array of light-transmitting holes, and the effector is disposed at the front end of the annular cavity and is attached to and connected to the first diffuse reflective plate.

[0010] The second diffuse reflective plate has a sampling aperture array, and the internal photodetector is disposed within the sampling aperture array and connected to the photoelectric signal acquisition circuit board via wires; the photoelectric signal acquisition circuit board is disposed within the rear end of the annular cavity;

[0011] One end of the electrical connector is connected to the photoelectric signal acquisition circuit board, and the other end is connected to the host computer. The host computer analyzes the output signals of the external photoelectric detector and the internal photoelectric detector, and determines the ablation and perforation time of the effector.

[0012] Furthermore, it also includes an annular pressure plate;

[0013] The inner diameter of the annular pressure plate is smaller than the outer diameter of the effector, and the difference between the inner diameter and the outer diameter of the effector is 1.5mm to 2.5mm.

[0014] The annular pressure plate is located at the front end of the annular cavity and is used to compress the effector.

[0015] Furthermore, a rear cover plate is connected to the rear end of the annular cavity. The rear cover plate is a circular flat plate with a diameter equal to the outer diameter of the annular cavity. A square protruding shell is provided at the center of the side of the circular flat plate facing away from the annular cavity. The square protruding shell is used to install an electrical connector.

[0016] Furthermore, the materials of the annular cavity, the first diffuse reflective plate, the second diffuse reflective plate, and the rear cover plate are all hard aluminum.

[0017] Furthermore, there are four stepped holes, which are equally spaced at the front end of the annular cavity, and an external photodetector is installed in each stepped hole.

[0018] Furthermore, the diameter of each light-transmitting hole in the light-transmitting hole array is 5mm~10mm, and the interval between adjacent light-transmitting holes is 12mm~15mm;

[0019] Each sampling hole in the sampling hole array has a diameter of 5mm to 10mm, and the interval between adjacent sampling holes is 70mm to 90mm.

[0020] Furthermore, the opposing sides of the first and second diffuse reflective plates are both sandblasted to improve the surface diffuse reflectance characteristics.

[0021] A method for measuring the ablation and perforation time of an effector, characterized in that it uses the aforementioned device for measuring the ablation and perforation time of an effector, and includes the following steps:

[0022] Step 1: Cut the object to be tested into a circle with a diameter equal to that of the first diffuse reflection plate, and place it close to the first diffuse reflection plate;

[0023] Step 2: Place the exposed side of the object to be tested in the optical path, and use the host computer to collect the output signals of the external photodetector and the internal photodetector through the photoelectric signal acquisition circuit board;

[0024] Step 3: Use the host computer to analyze the output signals of the external and internal photodetectors, and determine the ablation and perforation time of the effector based on the changes in the output signals of the external and internal photodetectors.

[0025] Further, in step 3, determining the ablation and perforation time of the effect material based on the changes in the output signals of the external and internal photodetectors specifically involves:

[0026] By comparing the transition times of the output signals from the external and internal photodetectors, the difference between the two transition times is the ablation and perforation time of the effector.

[0027] Furthermore, before step 1, the light-transmitting hole array on the first diffuse reflective plate is cleaned.

[0028] Compared with the prior art, the present invention has the following beneficial technical effects:

[0029] 1. The present invention provides an ablation perforation time measuring device and method for an effect material. By setting the first diffuse reflection plate and the second diffuse reflection plate in an annular cavity to form a diffuse reflection cavity, the number of photodetectors required for ablation perforation time measurement can be greatly reduced. For an effect material with a diameter of 300mm, without using a diffuse reflection cavity, based on an estimated interval of 15mm, the number of photodetectors required to measure the ablation perforation time exceeds 200. With the diffuse reflection cavity of the present invention, only a dozen or even fewer photodetectors are needed, which can save costs.

[0030] 2. The present invention provides an ablation and perforation time measurement device and method for effect objects, which reduces the design difficulty of the circuit and can measure the ablation and perforation time of effect objects that are moving / vibrating or whose light irradiation point is uncertain, and has high practicality.

[0031] 3. The present invention provides an effector ablation and perforation time measurement device and method, which reduces the design difficulty of the circuit and improves the reliability of the equipment.

[0032] 4. The present invention provides an effector ablation perforation time measurement device and measurement method, which isolates the photodetector from the effector by designing the diffuse reflection cavity, thereby avoiding the photodetector from being contaminated by smoke and dust or damaged by ablation.

[0033] 5. The device and method for measuring the ablation and perforation time of an effect object provided by the present invention do not have high requirements for the processing accuracy and installation accuracy of the device. The diffuse reflection surfaces of the first and second diffuse reflection plates only need to be treated by conventional sandblasting, without the need for special process treatment, which is easy to implement and can save costs and processing time.

[0034] 6. The device for measuring the ablation and perforation time of an effector provided by the present invention has a relatively compact structure, is resistant to impact and vibration, and can be applied in experimental scenarios with strong impact and vibration. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of an embodiment of the device for measuring the ablation and perforation time of an effector according to the present invention;

[0036] Figure 2 This is a cross-sectional view of an embodiment of the device for measuring the ablation and perforation time of an effector according to the present invention;

[0037] Figure 3 This is an exploded view of an embodiment of the ablation and perforation time measuring device for an effector according to the present invention;

[0038] Figure 4 This is a schematic diagram of the front end structure of the annular cavity in an embodiment of the effector ablation and perforation time measuring device of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the first diffuse reflection plate in an embodiment of the effector ablation and perforation time measuring device of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the second diffuse reflection plate in an embodiment of the effector ablation and perforation time measuring device of the present invention;

[0041] Figure 7In one embodiment of the method for measuring the ablation and perforation time of an effect material according to the present invention, the voltage change waveform over time is obtained by analyzing the output signals of the external photodetector and the internal photodetector.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1-Annular cavity, 11-Annular boss, 12-Stepped hole; 2-First diffuse reflection plate, 21-Light transmission hole array; 3-Second diffuse reflection plate, 31-Sampling hole array; 4-External photodetector; 5-Internal photodetector; 6-Photoelectric signal acquisition circuit board; 7-Annular pressure plate; 8-Effect material; 9-Rear cover plate, 91-Square raised hollow shell, 92-Electrical connector, 93-Host computer. Detailed Implementation

[0044] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0045] This embodiment provides a device for measuring the time of ablation and perforation of an effector, such as... Figure 1 , Figure 2 and Figure 3 As shown, it includes an annular cavity 1, an annular boss 11, a first diffuse reflection plate 2, a light-transmitting hole array 21, a second diffuse reflection plate 3, a sampling hole array 31, an external photodetector 4, an internal photodetector 5, a photoelectric signal acquisition circuit board 6, an annular pressure plate 7, a rear cover plate 9, a square raised hollow shell 91, an electrical connector 92, and a host computer 93.

[0046] The annular cavity 1 has an annular protrusion 11 in the middle of its inner wall. The first diffuse reflection plate 2 and the second diffuse reflection plate 3 are respectively disposed in the annular cavity 1 and are located at both ends of the annular protrusion 11 to form a diffuse reflection cavity. The annular protrusion 11 limits the first diffuse reflection plate 2 and the second diffuse reflection plate 3. The end where the first diffuse reflection plate 2 is located is the front end, and the end where the second diffuse reflection plate 3 is located is the rear end.

[0047] In order to improve the surface diffuse reflection characteristics, in this embodiment, the opposite sides of the first diffuse reflection plate 2 and the second diffuse reflection plate 3 are both sandblasted.

[0048] like Figure 4As shown, the front end of the annular cavity 1 is provided with stepped holes 12. There are four stepped holes 12, which are equally spaced at the front end of the annular cavity 1. An external photodetector 4 is installed in each stepped hole 12. The external photodetector 4 is installed in the end of the stepped hole 12 with the larger diameter, and is connected to the photoelectric signal acquisition circuit board 6 through the wire installed in the stepped hole 12. The external photodetector 4 receives the light signal in the external environment and transmits it to the photoelectric signal acquisition circuit board 6.

[0049] Alternatively, a slot extending towards the central axis of the annular cavity 1 can be opened at the smaller end of the stepped hole 12, and the wire can pass through the inner cavity of the annular cavity 1 to connect to the photoelectric signal acquisition circuit board 6.

[0050] like Figure 5 As shown, a light-transmitting hole array 21 is provided on the first diffuse reflection plate 2. The diameter of each light-transmitting hole in the light-transmitting hole array 21 is 5mm~10mm, and the spacing between the light-transmitting holes is 12mm~15mm. The effect material 8 is disposed at the front end of the annular cavity 1 and is attached to the first diffuse reflection plate 2. When the effect material 8 is burned through, the external light signal enters the diffuse reflection cavity through the light-transmitting hole array 21 for diffuse reflection.

[0051] like Figure 6 As shown, a sampling hole array 31 is provided on the second diffuse reflection plate 3. The diameter of each sampling hole in the sampling hole array 31 is 5mm~10mm, and the spacing between the sampling holes is 70mm~90mm. An internal photodetector 5 is set in the sampling hole array 31 and is connected to the photoelectric signal acquisition circuit board 6 through wires. The internal photodetector 5 collects the diffuse reflection light signal, and the photoelectric signal acquisition circuit board 6 collects the output signal of the internal photodetector 5.

[0052] One end of the electrical connector 92 is connected to the photoelectric signal acquisition circuit board 6, and the other end is connected to the host computer 93. The photoelectric signal acquisition circuit board 6 inputs the output signal of the external photoelectric detector 4 and the output signal of the internal photoelectric detector 5 to the host computer 93. The host computer 93 analyzes the output signals of the external photoelectric detector 4 and the internal photoelectric detector 5 and determines the ablation and perforation time of the effector.

[0053] This embodiment also provides a method for measuring the ablation and perforation time of an effector, including the following steps:

[0054] Step 1: Clean the light-transmitting hole array 21 on the first diffuse reflection plate 2, cut the test effect 8 into a circle with a diameter equal to that of the first diffuse reflection plate 2, place it close to the first diffuse reflection plate 2, and use the annular pressure plate 7 to press the test effect 8.

[0055] Step 2: Place the exposed side of the test object 8 in the optical path. The host computer 93 collects the output signals of the external photodetector 4 and the internal photodetector 5 through the photoelectric signal acquisition circuit board 6.

[0056] Step 3: The host computer 93 analyzes the output signals of the external photodetector 4 and the internal photodetector 5, and compares the transition times of the output signals of the external photodetector 4 and the internal photodetector 5. The difference between the two transition times is the ablation and perforation time of the effector. The result is as follows: Figure 7 As shown.

[0057] Figure 7 The green line represents the voltage-time waveform obtained from the analysis of the output signal of the internal photodetector 5, and the blue line represents the voltage-time waveform obtained from the analysis of the output signal of the external photodetector 4. Based on the two waveforms, the ablation and perforation time of the effector can be determined to be 15s.

[0058] This embodiment provides an ablation perforation time measurement device and method for an effect object. It can realize a diffuse reflection cavity by setting two layers of diffuse reflection plates, and can also isolate the photodetector from the effect object, avoiding the photodetector from being contaminated by smoke or dust or damaged by ablation. This greatly reduces the number of photodetectors required for ablation perforation time measurement, saves costs, and also greatly reduces the design difficulty of the circuit and improves the reliability of the equipment.

[0059] This embodiment provides an ablation perforation time measurement device and method for effect objects, which can measure the ablation perforation time of moving / vibrating effect objects without requiring a fixed position or stable environment, thus having higher practicality.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A device for measuring the time of ablation and perforation of an effector, characterized in that: It includes an annular cavity (1), a first diffuse reflective plate (2), a second diffuse reflective plate (3), an external photodetector (4), an internal photodetector (5), a photoelectric signal acquisition circuit board (6), an electrical connector (92), and a host computer (93); The annular cavity (1) has an annular protrusion (11) in the middle of its inner wall. The first diffuse reflection plate (2) and the second diffuse reflection plate (3) are respectively disposed in the annular cavity (1) and are located at the front and rear ends of the annular protrusion (11) to form a diffuse reflection cavity. The end where the first diffuse reflection plate (2) is located is the front end, and the end where the second diffuse reflection plate (3) is located is the rear end. The annular cavity (1) has a stepped hole (12) with the large end located at the front side. The external photodetector (4) is located in the large end of the stepped hole (12) and is connected to the photoelectric signal acquisition circuit board (6) through a wire located in the small end of the stepped hole (12). The first diffuse reflective plate (2) has a light-transmitting hole array (21), and the effect material (8) is disposed at the front end of the annular cavity (1) and is attached to the first diffuse reflective plate (2); The second diffuse reflective plate (3) is provided with a sampling hole array (31), and the internal photodetector (5) is set in the sampling hole array (31) and connected to the photoelectric signal acquisition circuit board (6) through wires; the photoelectric signal acquisition circuit board (6) is set in the rear end of the annular cavity (1); One end of the electrical connector (92) is connected to the photoelectric signal acquisition circuit board (6), and the other end is connected to the host computer (93). The host computer (93) analyzes the output signals of the external photoelectric detector (4) and the internal photoelectric detector (5) and determines the ablation and perforation time of the effector.

2. The device for measuring the ablation and perforation time of an effector according to claim 1, characterized in that: It also includes an annular pressure plate (7); The inner diameter of the annular pressure plate (7) is smaller than the outer diameter of the effector (8), and the difference between the inner diameter and the outer diameter of the effector (8) is 1.5 mm to 2.5 mm. The annular pressure plate (7) is located at the front end of the annular cavity (1) and is used to press the effect material (8).

3. The device for measuring the ablation and perforation time of an effector according to claim 1, characterized in that: The rear end of the annular cavity (1) is connected to a rear cover plate (9). The rear cover plate (9) is a circular flat plate with a diameter equal to the outer diameter of the annular cavity (1). A square protruding shell (91) is provided at the center of the side of the circular flat plate facing away from the annular cavity (1). The square protruding shell (91) is used to install an electrical connector (92).

4. The device for measuring the time of ablation and perforation of an effector according to claim 1, characterized in that: The materials of the annular cavity (1), the first diffuse reflective plate (2), the second diffuse reflective plate (3), and the rear cover plate (9) are all hard aluminum.

5. The device for measuring the ablation and perforation time of an effector according to claim 1, characterized in that: There are four stepped holes (12), which are equally spaced at the front end of the annular cavity (1). An external photodetector (4) is installed in each stepped hole (12).

6. The device for measuring the ablation and perforation time of an effector according to claim 1, characterized in that: The diameter of each light-transmitting hole in the light-transmitting hole array (21) is 5mm~10mm, and the interval between adjacent light-transmitting holes is 12mm~15mm. The diameter of each sampling hole in the sampling hole array (31) is 5mm~10mm, and the interval between adjacent sampling holes is 70mm~90mm.

7. The device for measuring the time of ablation and perforation of an effector according to claim 1, characterized in that: The opposite sides of the first diffuse reflective plate (2) and the second diffuse reflective plate (3) are both sandblasted to improve the surface diffuse reflective properties.

8. A method for measuring the ablation and perforation time of an effector, characterized in that, Using the effector ablation perforation time measuring device according to any one of claims 1-7, the method includes the following steps: Step 1: Cut the test effect object (8) into a circle with a diameter equal to that of the first diffuse reflection plate (2) and place it close to the first diffuse reflection plate (2); Step 2: Place the exposed side of the test object (8) in the optical path, and use the host computer (93) to collect the output signals of the external photodetector (4) and the internal photodetector (5) through the photoelectric signal acquisition circuit board (6); Step 3: Use the host computer (93) to analyze the output signals of the external photodetector (4) and the internal photodetector (5), and determine the ablation time of the effector based on the changes in the output signals of the external photodetector (4) and the internal photodetector (5).

9. The method for measuring the ablation and perforation time of an effector according to claim 8, characterized in that, In step 3, determining the ablation and perforation time of the effect material based on the changes in the output signals of the external photodetector (4) and the internal photodetector (5) specifically involves: Compare the transition times of the output signals of the external photodetector (4) and the internal photodetector (5). The difference between the two transition times is the ablation and perforation time of the effector.

10. The method for measuring the ablation and perforation time of an effector according to claim 8, characterized in that, Before step 1, the light-transmitting hole array (21) on the first diffuse reflective plate (2) is also cleaned.

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