Deicing device and test method for coupling low-interface toughness coating with piezoelectricity

Abstract

The invention provides a low-interface toughness coating coupling piezoelectric deicing device and a test method. The device comprises a signal generator (1), a power supply (2), a power amplifier (3), a piezoelectric plate (4), a substrate plate (5), a low interface toughness coating (6), a fixed bottom plate (7), a clamping device (8), a fixing device (9) and a vibration meter (10). The invention further relates to a testing method of the device. The device can fully show the state of the ice layer on the surface of the sample, the interface change and the fragmentation or falling process when the coating and the piezoelectric vibration act at the same time; according to the invention, the comprehensive deicing performance of the coupling piezoelectricity of the low-interface toughness coating can be accurately evaluated; the deicing device for coupling the low-interface-toughness coating with the piezoelectricity is easy to build, simple to operate and high in applicability, can quantitatively evaluate the anti-icing / deicing performance of the sample at multiple angles, and provides technical support for development of the field of low-energy-consumption, large-area and efficient deicing.

Description

Technical Field

[0001] The present invention relates to the technical field of deicing materials; in particular, it relates to a deicing device coupling a low interfacial toughness coating and piezoelectricity and a testing method therefor. Background Art

[0002] Icing is one of the problems that have a significant impact on the flight safety of aircraft. A large number of supercooled droplets in clouds will freeze on the surface of the aircraft. The ice layer adhering to the wing will significantly reduce the lift of the aircraft and at the same time increase the difficulty of flight control, which has become a major safety hazard that cannot be ignored in the aviation field.

[0003] Regarding the icing problem on the surface of the aircraft, researchers have proposed a variety of anti / deicing methods, such as active deicing strategies represented by thermal deicing and mechanical deicing, and passive anti-icing strategies represented by superhydrophobic surfaces and low interfacial toughness coatings. Both strategies have their unique anti / deicing advantages, but are limited by their respective disadvantages. Therefore, in recent years, the active-passive coupled anti / deicing system has received a great deal of attention, effectively solving the deficiencies of high energy consumption and low deicing efficiency of the two.

[0004] Among them, piezoelectric deicing, as an active deicing method with relatively low energy consumption, utilizes the inverse piezoelectric effect. By applying an external electric field to the piezoelectric element, it is forced to vibrate. When the vibration frequency reaches the natural frequency of the sample, the vibration effect is enhanced, and the ice layer is fragmented or shed under the mechanical shear action; due to its low solid-ice interfacial fracture toughness, the low interfacial toughness coating induces the initiation, propagation and coalescence of microcracks at the solid-ice interface. When the ice layer area reaches a certain size, due to the unique crack propagation and fracture mode, the external force required for deicing will remain a fixed value and will not increase with the increase of the icing size, having a significant advantage in large-area deicing. Therefore, coupling a low interfacial toughness coating with piezoelectric vibration can effectively achieve high-efficiency and low-energy large-area deicing.

[0005] For the research on deicing by coupling a low interfacial toughness coating and piezoelectricity, there is a lack of specific deicing test devices, and conventional testing methods often can only conduct single performance evaluations on the adhesion strength of the coating and the piezoelectric deicing time, etc., and cannot conduct comprehensive performance tests on the coupled components. Therefore, in response to the need for efficiently and accurately evaluating the deicing effect of coupling a low interfacial toughness coating and piezoelectricity, it is urgent to establish a corresponding deicing device and its testing method to provide technical support for the active-passive coupled anti / deicing technology on the surface of the aircraft. Summary of the Invention

[0006] The purpose of the present invention is to provide a deicing device coupling a low interfacial toughness coating and piezoelectricity and a testing method therefor.

[0007] The present invention is achieved by the following technical solutions:

[0008] The present invention relates to an ice removal device that couples a low-interface toughness coating with piezoelectricity, comprising: a signal generator 1, a power supply 2, a power amplifier 3, a piezoelectric sheet 4, a base substrate 5, a low-interface toughness coating 6, a fixed base plate 7, a clamping device 8, a fixing device 9, and a vibration measuring instrument 10;

[0009] The low-interface toughness coating 6 is disposed on the front surface of the base substrate 5, and the piezoelectric sheet 4 is adhered to the back surface of the base substrate 5. The positive and negative electrodes of the piezoelectric sheet 4 are connected to the power amplifier 3 through wires;

[0010] The clamping device 8 is fixed to the fixed base plate 7 through a movable fixture and is used for clamping the base substrate 5;

[0011] The clamping device 8 is composed of four identical fixtures fixed to the fixed base plate 7 by screws. The fixtures are movable to adjust the clamping degree of the base substrate 5;

[0012] The bottom of the fixing device 9 is fixed to the fixed base plate 7, and its upper end is connected to the vibration measuring instrument 10 to ensure that the measuring end of the vibration measuring instrument 7 remains horizontal, eliminating the influence of its own gravity on the results.

[0013] Preferably, the low-interface toughness coating 6 is any low-interface toughness material such as porous PDMS, PDMA, or PTFE.

[0014] Preferably, the thickness of the low-interface toughness coating 6 is 50 μm.

[0015] Preferably, the material of the piezoelectric sheet 4 is any piezoelectric ceramic such as PZT-4, PZT-5, or PZT-8.

[0016] Preferably, the thickness of the piezoelectric sheet 4 is 0.2 mm.

[0017] Preferably, the size of the piezoelectric sheet 4 is 30 mm × 40 mm.

[0018] Preferably, the base substrate 5 is an aluminum alloy material substrate.

[0019] Preferably, the probe of the vibration measuring instrument 10 is disk-shaped.

[0020] The present invention also relates to a test method for the aforementioned ice removal device that couples a low-interface toughness coating with piezoelectricity, comprising the following steps:

[0021] Step 1: Adhere the piezoelectric sheet 4 to the back surface of the base substrate 5 coated with the low-interface toughness coating 6, and freeze ice on the surface of the coating;

[0022] Step 2: Fix the specimen with ice frozen in Step 1 using the clamping device 8, and connect the piezoelectric sheet 4 to the power amplifier 3 connected to the signal generator 1 through wires;

[0023] Step 3: Turn on the power supply 2, adjust the signal generator 1 to input a signal of a certain frequency, and adjust the power amplifier 3 to apply a certain voltage to the piezoelectric sheet 4.

[0024] Step 4: Start the timer and record the time when the surface ice cubes fall off.

[0025] Step 5: Place the vibration measuring instrument 10 on the fixing device 9, ensure that the measuring end is horizontal, and the probe of the vibration measuring instrument 10 is in contact with the surface of the low interface toughness coating 6, and record the data of the vibration measuring instrument 10. Continue to adjust the input frequency of the signal generator 1 and record the change of the data of the vibration measuring instrument 10.

[0026] Preferably, in Step 3, the frequency input by the signal generator is 1500 Hz.

[0027] Preferably, in Step 3, the voltage applied by the power amplifier is 100 V or 200 V.

[0028] Preferably, in Step 5, the data provided by the vibration measuring instrument is the vibration acceleration.

[0029] From the perspective of the combined application of active de-icing and passive anti-icing, the present invention proposes a de-icing device and a testing method for a low interface toughness coating coupled with piezoelectric de-icing, which can effectively carry out de-icing tests, and at the same time can evaluate the de-icing performance from multiple angles, quantitatively and accurately, providing technical support for the research on low-energy large-area de-icing.

[0030] The present invention has the following advantages:

[0031] (1) The de-icing device of the low interface toughness coating coupled with piezoelectricity involved in the present invention can visually display the de-icing process, that is, fully display the state of the ice layer on the specimen surface, the interface change, and the process of fragmentation or shedding when the coating and piezoelectric vibration act simultaneously.

[0032] (2) The present invention can simultaneously conduct de-icing tests and surface vibration intensity tests on specimens of low interface toughness coating coupled with piezoelectricity. Instead of separately testing and evaluating the performance of coating anti-icing and piezoelectric de-icing, it accurately evaluates the comprehensive de-icing performance of low interface toughness coating coupled with piezoelectricity.

[0033] (3) The de-icing device of the low interface toughness coating coupled with piezoelectricity involved in the present invention is easy to build, simple to operate, and has strong applicability. It can evaluate the anti- / de-icing performance of specimens from multiple angles quantitatively, providing technical support for the development of the fields of low energy consumption, large area, and high efficiency de-icing. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of a de-icing device for a low interface toughness coating coupled with piezoelectricity involved in the present invention;

[0035] Figure 2It is a flow chart of the test method involved in the present invention;

[0036] Figure 3 It is a curve graph of the vibration effect on the surface of the specimen at different frequencies;

[0037] Annotation of the attached figure: 1 is a signal generator, 2 is a power supply, 3 is a power amplifier, 4 is a piezoelectric sheet, 5 is a base substrate, 6 is a low interfacial toughness coating, 7 is a fixed base plate, 8 is a clamping device, 9 is a fixing device, and 10 is a vibration measuring instrument. Detailed implementation manners

[0038] The present invention will be described in detail below in conjunction with specific embodiments. It should be noted that the following embodiments are only further descriptions of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0039] Embodiment 1

[0040] This embodiment relates to a de-icing device coupling piezoelectric with a low interfacial toughness coating, as shown in Figure 1 shown; it includes: a signal generator 1, a power supply 2, a power amplifier 3, a piezoelectric sheet 4, a base substrate 5, a low interfacial toughness coating 6, a fixed base plate 7, a clamping device 8, a fixing device 9, and a vibration measuring instrument 10;

[0041] The piezoelectric sheet 4 is pasted on the back of the base substrate 5, and the positive and negative poles of the piezoelectric sheet 4 are respectively connected to the power amplifier 3 through wires.

[0042] The clamping device 8 is fixed on the fixed base plate 7 by four identical clamps through screws, and the clamps are movable to adjust the clamping degree of the base substrate 5.

[0043] The bottom of the fixing device 9 is fixed on the fixed base plate 7, and the upper end is used to fix the handle of the vibration measuring instrument 10 to ensure that the measuring end of the vibration measuring instrument 7 remains horizontal and eliminate the influence of its own gravity on the result.

[0044] The piezoelectric sheet 4 is PZT-4.

[0045] The base substrate 5 is an aluminum alloy material substrate.

[0046] The low interfacial toughness coating 6 is a porous PDMS coating.

[0047] The probe of the vibration measuring instrument 10 is disc-shaped.

[0048] This embodiment also relates to a test method for the aforementioned de-icing device coupling piezoelectric with a low interfacial toughness coating, as shown in Figure 2 shown, and the specific steps are as follows:

[0049] Step 1: Paste a PZT-4 piezoelectric sheet with dimensions of 30 mm × 40 mm and a thickness of 0.2 mm on the back of the base substrate covered with a low-interface toughness porous PDMS coating, and freeze an ice block of 10 mm × 10 mm × 10 mm on the surface of the coating;

[0050] Step 2: Fix the specimen with an ice block frozen in Step 1 using the clamping device 8, and connect the piezoelectric sheet and the power amplifier 3 connected to the signal generator 1 through wires;

[0051] Step 3: Turn on the power supply 2, adjust the signal generator 1 to input a signal with a frequency of 1500 Hz, and adjust the power amplifier 3 to apply a voltage of 100 V to the piezoelectric sheet;

[0052] Step 4: Start the timer and record the time when the surface ice block falls off as 32 s;

[0053] Step 5: Place the vibration measuring instrument on the fixing device 9, ensure that the measuring end is horizontal, and the probe is in contact with the surface of the low-interface toughness coating, and record the acceleration shown by the vibration measuring instrument 10 as 39.8 m / s 2 , continue to adjust the input frequency of the signal generator 1, and record the data change of the vibration measuring instrument 10. The results are shown in Figure 3 shown.

[0054] Example 2

[0055] This example relates to a de-icing device coupling piezoelectric with a low-interface toughness coating, as shown in Figure 1 shown; it includes: a signal generator 1, a power supply 2, a power amplifier 3, a piezoelectric sheet 4, a base substrate 5, a low-interface toughness coating 6, a fixed base plate 7, a clamping device 8, a fixing device 9, and a vibration measuring instrument 10;

[0056] The piezoelectric sheet 4 is pasted on the back of the base substrate 5, and the positive and negative poles are respectively connected to the power amplifier 3 through wires.

[0057] The clamping device 8 is fixed on the fixed base plate 7 by four identical clamps through screws. The clamps are movable to adjust the clamping degree of the base substrate 5.

[0058] The bottom of the fixing device 9 is fixed on the fixed base plate 7, and the upper end is used to fix the handle of the vibration measuring instrument 10 to ensure that the measuring end of the vibration measuring instrument 7 is horizontal and eliminate the influence of its own gravity on the results.

[0059] The piezoelectric sheet 4 is PZT-5.

[0060] The base substrate 5 is an aluminum alloy material substrate.

[0061] The low-interface toughness coating 6 is a porous PDMS coating.

[0062] The probe of the vibration meter 10 is disc-shaped.

[0063] This embodiment also relates to a test method for the ice removal device with low interface toughness coating coupled with piezoelectricity as described above. As shown in Figure 2 the specific steps are as follows:

[0064] Step 1: Paste a PZT-5 piezoelectric sheet with dimensions of 30 mm × 40 mm and a thickness of 0.2 mm on the back of the base substrate covered with a low interface toughness porous PDMS coating, and freeze an ice block of 10 mm × 10 mm × 10 mm on the coating surface;

[0065] Step 2: Fix the specimen with the ice block in Step 1 using the clamping device 8, and connect the piezoelectric sheet and the power amplifier 3 connected to the signal generator 1 through wires;

[0066] Step 3: Turn on the power supply 2, adjust the signal generator 1 to input a signal with a frequency of 1500 Hz, and adjust the power amplifier 3 to apply a voltage of 100 V to the piezoelectric sheet;

[0067] Step 4: Start the timer and record the time when the ice on the surface falls off as 54 s;

[0068] Step 5: Place the vibration meter on the fixing device 9, ensure that the measuring end is horizontal, and the probe is in contact with the surface of the low interface toughness coating, and record the acceleration shown by the vibration meter 10 as 27.5 m / s 2 .

[0069] Embodiment 3

[0070] This embodiment relates to an ice removal device with low interface toughness coating coupled with piezoelectricity. As shown in Figure 1 it includes: a signal generator 1, a power supply 2, a power amplifier 3, a piezoelectric sheet 4, a base substrate 5, a low interface toughness coating 6, a fixing base plate 7, a clamping device 8, a fixing device 9, and a vibration meter 10;

[0071] The piezoelectric sheet 4 is pasted on the back of the base substrate 5, and the positive and negative poles are respectively connected to the power amplifier 3 through wires.

[0072] The clamping device 8 is fixed on the fixing base plate 7 by four identical clamps through screws, and the clamps are movable to adjust the clamping degree of the base substrate 5.

[0073] The bottom of the fixing device 9 is fixed on the fixing base plate 7, and the upper end is used to fix the handle of the vibration meter 10 to ensure that the measuring end of the vibration meter 7 is horizontal and eliminate the influence of its own gravity on the result.

[0074] The piezoelectric sheet 4 is PZT-4.

[0075] The base substrate 5 is an aluminum alloy material substrate.

[0076] The low interface toughness coating 6 is a PTFE coating.

[0077] The probe of the vibration meter 10 is disc-shaped.

[0078] This embodiment also relates to a test method for the aforementioned low interface toughness coating coupled piezoelectric deicing device, see Figure 2 The specific steps are as follows:

[0079] Step 1: A 30 mm × 40 mm, 0.2 mm thick PZT-4 piezoelectric sheet is attached to the back of a substrate coated with a low-interfacial-toughness porous PDMS coating, and a 10 mm × 10 mm × 10 mm ice cube is frozen on the coating surface.

[0080] Step 2: Fix the sample with ice cubes frozen in step 1 with a clamping device 8, and connect the piezoelectric piece to the power amplifier 3 connected to the signal generator 1 through a wire;

[0081] Step 3: Turn on the power supply 2, adjust the signal generator 1 to input a signal with a frequency of 1500 Hz, and adjust the power amplifier 3 to apply a voltage of 100 V to the piezoelectric piece;

[0082] Step 4: Start the timer and record the time for the surface ice to fall off as 77 seconds;

[0083] Step 5: Place the vibrometer on the fixture 9, ensure that the measuring end remains horizontal and the probe contacts the surface of the low interface toughness coating, and record the acceleration displayed by the vibrometer 10 as 20.6 m / s 2 .

[0084] Example 4

[0085] This embodiment relates to a de-icing device with a low interface toughness coating coupled with piezoelectricity. Figure 1 As shown; including: a signal generator 1, a power supply 2, a power amplifier 3, a piezoelectric piece 4, a base plate 5, a low interface toughness coating 6, a fixed base plate 7, a clamping device 8, a fixing device 9, and a vibrometer 10;

[0086] The piezoelectric sheet 4 is attached to the back of the base plate 5, and the positive and negative electrodes are connected to the power amplifier 3 through wires respectively.

[0087] The clamping device 8 is fixed to the fixed base plate 7 by four identical clamps through screws. The clamps are movable to adjust the degree of clamping of the base plate 5.

[0088] The bottom of the fixing device 9 is fixed on the fixed base plate 7, and the upper end is used to fix the handle of the vibration meter 10 to ensure that the measuring end of the vibration meter 7 remains horizontal and eliminate the influence of its own gravity on the result.

[0089] The piezoelectric sheet 4 is PZT-4.

[0090] The base substrate 5 is an aluminum alloy material substrate.

[0091] The low interface toughness coating 6 is a porous PDMS coating.

[0092] The probe of the vibration measuring instrument 10 is disc-shaped.

[0093] This embodiment also relates to a test method for the de-icing device with low interface toughness coating coupled with piezoelectricity as described above. As shown in Figure 2 it is shown, and the specific steps are as follows:

[0094] Step 1: Paste a PZT-4 piezoelectric sheet with dimensions of 30mm×40mm and a thickness of 0.2mm on the back of the base substrate covered with a low interface toughness porous PDMS coating, and freeze an ice block of 10mm×10mm×10mm on the surface of the coating.

[0095] Step 2: Fix the specimen with the ice block in Step 1 using the clamping device 8, and connect the piezoelectric sheet and the power amplifier 3 connected to the signal generator 1 through a wire.

[0096] Step 3: Turn on the power supply 2, adjust the signal generator 1 to input a signal with a frequency of 1500Hz, and adjust the power amplifier 3 to apply a voltage of 200V to the piezoelectric sheet.

[0097] Step 4: Start the timer and record the time when the ice on the surface falls off as 19s.

[0098] Step 5: Place the vibration measuring instrument on the fixing device 9, ensure that the measuring end is horizontal, and the probe is in contact with the surface of the low interface toughness coating, and record the acceleration shown by the vibration measuring instrument 10 as 56.3m / s 2 .

[0099] In summary, the de-icing device with low interface toughness coating coupled with piezoelectricity involved in the present invention can visually display the de-icing process, that is, fully display the state of the ice layer on the specimen surface, the interface change, and the process of fragmentation or shedding when the coating and piezoelectric vibration act simultaneously; the present invention can simultaneously perform de-icing tests and surface vibration intensity tests on specimens with low interface toughness coating coupled with piezoelectricity, and accurately evaluate the comprehensive de-icing performance of the low interface toughness coating coupled with piezoelectricity; the de-icing device with low interface toughness coating coupled with piezoelectricity involved in the present invention is easy to build, simple to operate, and has strong applicability, and can quantitatively evaluate the anti / de-icing performance of the specimen from multiple angles, providing technical support for the development of the fields of low energy consumption, large area, and high-efficiency de-icing.

[0100] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A de-icing device coupling piezoelectricity with a low-interface toughness coating, characterized in that, Including: A signal generator (1), a power supply (2), a power amplifier (3), a piezoelectric sheet (4), a base substrate (5), a low interfacial toughness coating (6), a fixing base plate (7), a clamping device (8), a fixing device (9), and a vibration measuring instrument (10); The positive and negative electrodes of the piezoelectric sheet (4) are connected to the power amplifier 3 through wires; a low interfacial toughness coating (6) is provided on the front surface of the base substrate (5), and the piezoelectric sheet (4) is pasted on its back surface; The clamping device (8) is fixed to the fixing base plate (7) through a movable fixture and is used to clamp the base substrate (5); The bottom of the fixing device (9) is fixed to the fixing base plate (7), and its upper end is connected to the vibration measuring instrument (10).

2. The ice removal device with a low-interface toughness coating-coupled piezoelectric as described in claim 1, characterized in that, The low interfacial toughness coating (6) is one of low interfacial toughness materials such as porous PDMS, PDMA, or PTFE.

3. The de-icing device with a low-interface toughness coating coupled with piezoelectricity according to claim 1, characterized in that, The thickness of the low interfacial toughness coating (6) is 50 μm.

4. The de-icing device with a low-interface toughness coating-coupled piezoelectric as claimed in claim 1, wherein The material of the piezoelectric sheet (4) is one of piezoelectric ceramics such as PZT-4, PZT-5, or PZT-8.

5. The de-icing device with a low-interface toughness coating-coupled piezoelectric as described in claim 1, characterized in that The thickness of the piezoelectric sheet (4) is 0.2 mm.

6. The ice removal device with a low-interface toughness coating-coupled piezoelectric as described in claim 1, characterized in that, The size of the piezoelectric sheet (4) is 30 mm × 40 mm.

7. The ice removal device with a low-interface toughness coating-coupled piezoelectric as described in claim 1, characterized in that, The base substrate (5) is an aluminum alloy material substrate.

8. The de-icing device with a low-interface toughness coating-coupled piezoelectric as claimed in claim 1, wherein The probe of the vibration measuring instrument (10) is disc-shaped.

9. A testing method for a low-interface toughness coating-coupled piezoelectric de-icing device as described in claim 1, characterized in that, Including the following steps: Step 1, paste the piezoelectric sheet (4) on the back surface of the base substrate (5) with a low interfacial toughness coating (6) on the front surface, and freeze ice cubes on the surface of the low interfacial toughness coating (6); Step 2, fix the sheet specimen with ice cubes frozen in Step 1 using the clamping device (8), and connect the piezoelectric sheet (4) to the power amplifier (3) connected to the signal generator (1) through wires; Step 3, turn on the power supply (2), adjust the signal generator (1) to input a signal of a certain frequency, and adjust the power amplifier (3) to apply a certain voltage to the piezoelectric sheet (4); Step 4, start the timer and record the time when the surface ice cubes fall off; Step 5, place the vibration measuring instrument (10) on the fixing device (9), ensure that the measuring end is horizontal, and the probe of the vibration measuring instrument (10) is in contact with the surface of the low interfacial toughness coating (6), record the data of the vibration measuring instrument (10), continue to adjust the input frequency of the signal generator (1), and record the change in the vibration acceleration of the vibration measuring instrument (10).

10. The test method of the low-interface toughness coating-coupled piezoelectric de-icing device according to claim 9, characterized in that In Step 3, the frequency input by the signal generator (1) is 1500 Hz; the voltage applied by the power amplifier (3) to the piezoelectric sheet (4) is 100 V or 200 V.

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