CN118645034A - Automated experimental device for droplet impact on flexible surface in low temperature environment - Google Patents

Automated experimental device for droplet impact on flexible surface in low temperature environment Download PDF

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CN118645034A
CN118645034A CN202410682699.8A CN202410682699A CN118645034A CN 118645034 A CN118645034 A CN 118645034A CN 202410682699 A CN202410682699 A CN 202410682699A CN 118645034 A CN118645034 A CN 118645034A
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low temperature
temperature environment
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droplet
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胡松涛
丁玺佳
史熙
彭志科
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Shanghai Jiao Tong University
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    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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    • G01N2021/8411—Application to online plant, process monitoring

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Abstract

一种低温环境下的液滴冲击柔性表面自动化实验装置，包括：控制模块以及分别与之相连的液滴生成模块、冲击模块、低温环境生成模块和冲击行为观测模块，其中：控制模块输出控制指令并采集实验信息，液滴生成模块和冲击模块依次上下相对设置，低温环境生成模块设置于冲击模块的外部，冲击行为观测模块正对冲击模块。本发明采用工控机统筹控制，能够自动化地开展低温液滴冲击实验，用光电融合方法进行测量，提高实验的准确性、稳定性与效率。

An automated experimental device for droplet impact on a flexible surface in a low-temperature environment includes: a control module and a droplet generation module, an impact module, a low-temperature environment generation module and an impact behavior observation module respectively connected thereto, wherein: the control module outputs control instructions and collects experimental information, the droplet generation module and the impact module are arranged in sequence up and down, the low-temperature environment generation module is arranged outside the impact module, and the impact behavior observation module is directly opposite to the impact module. The present invention adopts an industrial computer for overall control, can automatically carry out low-temperature droplet impact experiments, uses a photoelectric fusion method for measurement, and improves the accuracy, stability and efficiency of the experiment.

Description

Automatic experiment device for impact of liquid drops on flexible surface in low-temperature environment
Technical Field
The invention relates to a technology in the field of physical experiments, in particular to an automatic experimental device for impact of liquid drops on a flexible surface in a low-temperature environment.
Background
The drop impact behavior of the low-temperature surface is commonly found in the icing process of an airplane and the spray impact of an internal combustion engine in an ultra-cold environment, so that the surface of a part is easily frozen, the interaction of the interface environment is damaged, and the normal use of the part is influenced. The flexible design of the impacted surface can obviously reduce the solid-liquid contact time, endow the surface of the part with hydrophobic anti-icing property, and has important significance for the research of the part without additional energy consumption. However, the measurement of impact behavior is limited to optical measurement methods such as high-speed cameras and laser-induced fluorescence, and the like, and problems of structural shielding and environmental interference are faced. In addition, the impact behavior of low-temperature liquid drops can be influenced by various factors such as liquid drop size, impact speed, impact angle, surface flexibility, ambient temperature and the like, and under the conditions of large experimental quantity and multiple variables, the existing experimental device has the following problems: firstly, the low-temperature environment is uneven and stable, and reliable experimental conditions are difficult to provide; secondly, the repeated experiment process is tedious and time-consuming, and human errors are easy to introduce.
Disclosure of Invention
Aiming at the defects that the generation of liquid drops under a low-temperature environment, the flexibility of an impacted surface and the electrical measurement of the impact of the liquid drops on the flexible surface cannot be realized in the prior art, the invention provides an automatic experimental device for the impact of the liquid drops on the flexible surface under the low-temperature environment, which adopts the overall control of an industrial personal computer, can automatically develop a low-temperature liquid drop impact experiment, uses a photoelectric fusion method for measurement, and improves the accuracy, the stability and the efficiency of the experiment.
The invention is realized by the following technical scheme:
The invention relates to an automatic experiment device for impact of liquid drops on a flexible surface in a low-temperature environment, which comprises the following components: the device comprises a control module, and a liquid drop generating module, an impact module, a low-temperature environment generating module and an impact behavior observing module which are respectively connected with the control module, wherein: the control module outputs a control instruction and collects experimental information, and the control module is respectively connected with the droplet generation module, the impact module, the low-temperature environment generation module and the impact behavior observation module, wherein: the liquid drop generating module and the impact module are arranged up and down in sequence oppositely, the low-temperature environment generating module is arranged outside the impact module, and the impact behavior observing module is opposite to the impact module.
The liquid drop generating module comprises: to strike liquid, liquid splendid attire container, liquid extrusion equipment and liquid drop position appearance guiding mechanism, wherein: the liquid to be impacted is contained in a liquid containing container and extruded by liquid extrusion equipment; the liquid extrusion device and the liquid drop position and posture adjusting mechanism are connected through a connecting piece, and liquid drops with different sizes, impact speeds and impact angles are generated by adjusting the liquid extrusion device and the liquid drop position and posture adjusting mechanism.
The impact module includes: a surface to be impacted, and a surface pose adjusting mechanism and an additional component respectively connected with the surface to be impacted, wherein: the surface to be impacted is connected with the detection table through the surface pose adjusting mechanism, and the liquid to be impacted is impacted at a proper position of the surface to be impacted through adjusting the surface pose adjusting mechanism.
The surface to be impacted comprises a hydrophobic coating, a film layer, a cavity layer, an electrode layer and a basal layer which are sequentially arranged from top to bottom, wherein: the edge of the film layer is fixed above a cavity layer of the rigid frame, a closed cavity communicated with the additional component is formed in the middle of the cavity layer, and the surface morphology, mechanical property and hydrophilic-hydrophobic characteristic of the surface to be impacted can be flexibly adjusted in real time by adjusting the output air pressure of the additional component.
The low-temperature environment generation module comprises: low temperature environment case, cold source, radiator, low temperature constant temperature tank, environment refrigerant, dry gas, fan and hygrothermograph, wherein: the cold source is located inside the low-temperature environment box, the radiator is attached to the cold source, heat generated by the cold source is taken away, the radiator is connected with the low-temperature constant temperature tank, the medium in the radiator is kept at low temperature by the low-temperature constant temperature tank, the environment refrigerant is located inside the low-temperature environment box, the environment temperature inside the low-temperature environment box is reduced, the drying gas is introduced into the low-temperature environment box, the environment humidity inside the low-temperature environment box is reduced, so that the impact behavior observation is prevented from being influenced by the condensation of water vapor, the air flow inside the low-temperature environment box is accelerated by the fan, the uniform low-temperature environment can be built quickly, the temperature and the humidity inside the low-temperature environment box are monitored by the hygrothermograph in real time, and a feedback link of a control system is formed.
The impact behavior observation module comprises: high-speed camera, light source, camera position appearance guiding mechanism and electricity measuring equipment, wherein: the high-speed camera shoots the action of impacting the surface to be impacted of the liquid to be impacted in the low-temperature environment box from two angles simultaneously, the light source is matched with the high-speed camera to provide the brightness of the shot object, the high-speed camera is connected with the light source through the camera pose adjusting mechanism and the environment, and the high-speed camera can clearly and accurately shoot the action of impacting the low-temperature liquid drops through adjusting the pose adjusting mechanism. An electrical measurement device is connected to the electrode layer by a signal line to measure electrical characteristics during the impact behavior of the low temperature droplet.
Technical effects
The invention adopts the electrical measurement equipment as a supplementary measurement means of the high-speed camera to effectively avoid the problems of structural shielding and light interference faced by the optical measurement means. In experiments, the electrical measurement device can more accurately and conveniently measure characteristics such as the number of bouncing of liquid drops, and has resolution and data processing speed superior to those of a high-speed camera. Meanwhile, the automatic experimental device provides a uniform and stable low-temperature environment, and human errors are effectively reduced through the synergistic effect of the control module and each module.
Compared with the prior art, the invention improves the measurement accuracy of the characteristics such as the number of liquid drop bounces, avoids the structural shielding and the light interference which are possibly faced by an optical measurement mode, and accelerates the information acquisition and processing speed in the experimental process. The automatic experimental device provides a uniform and stable low-temperature environment, reduces the introduction of human errors, is beneficial to the accuracy and reliability of experimental results, and improves the stability and repeatability of experiments.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic view of the interior of the cryogenic environment tank;
FIG. 3 is a schematic view of a surface to be impacted;
In the figure: a hydrophobic coating, a film layer, a chamber layer 3, an electrode layer 4, a substrate layer 5, liquid to be impacted 11, a liquid container 12, liquid extrusion equipment 13, a connecting piece 14, a liquid drop pose adjusting mechanism 15, a surface to be impacted 21, a three-axis electric angular platform 22, a three-axis electric displacement platform 23, a positive pressure air pump 24, a negative pressure air pump 25, a multi-channel air pump 26, a low-temperature environment box 31, a cold source 32, a radiator 33, a low-temperature constant temperature tank 34, an environment refrigerant 35, a drying gas 36, a fan 37, a 38 hygrothermograph 41, a 42 high-speed camera 43 light source 44, 45, 46, 47, 48 camera pose adjusting mechanisms 49 electric measuring equipment and a 51 control module;
FIG. 4 is a schematic diagram of the behavior of a low temperature droplet shot by a high speed camera impacting a flexible surface;
Fig. 5 is a schematic diagram showing the behavior of the impact of the low-temperature liquid drop on the flexible surface, which is measured by the electrometer.
Detailed Description
As shown in fig. 1, an automated experiment device for impacting a flexible surface with a droplet in a low-temperature environment according to this embodiment includes: the control module 51, and the droplet generation module, the impact module, the low-temperature environment generation module and the impact behavior observation module respectively connected with the control module, wherein: the liquid drop generating module and the impact module are arranged up and down in sequence oppositely, the low-temperature environment generating module is arranged outside the impact module, and the impact behavior observing module is opposite to the impact module.
The control module sends control instructions to the liquid extrusion device 13, the liquid drop position and posture adjusting mechanism 15, the surface position and posture adjusting mechanisms 22 and 23, the additional components 24, 25 and 26, the cold source 32, the low-temperature constant-temperature tank 34, the fan 37, the high-speed cameras 41 and 42, the light source 43 and the camera position and posture adjusting mechanisms 44, 45, 46 and 47 respectively, and collects extrusion speed and height of the liquid extrusion device 13, the position and posture of the liquid drop position and posture adjusting mechanism 15, the positions and posture of the surface position and posture adjusting mechanisms 22 and 23, air pressure of the additional components 24, 25 and 26, temperature of the low-temperature constant-temperature tank 34, speed of the fan 37, temperature and humidity information collected by the hygrothermograph 38, image information collected by the high-speed cameras 41 and 42 and electrical information collected by the electrical measuring device 49.
The liquid drop generating module comprises: a liquid 11 to be impacted, a liquid container 12, a liquid extrusion device 13 and a pose adjusting mechanism 15, wherein: the liquid to be impacted is contained in a liquid containing container and extruded by liquid extrusion equipment; the liquid extrusion device is connected with the pose adjusting mechanism through the connecting piece, and fluids with different characteristics are formed by adjusting the liquid extrusion device and the pose adjusting mechanism.
As shown in fig. 2, the low-temperature environment generating module includes: a low temperature environment box 31, a cold source 32, a radiator 33, a low temperature constant temperature tank 34, an environment refrigerant 36, a fan 37 and a hygrothermograph 38, wherein: the cold source 32 is located inside the low-temperature environment box 31, the radiator 33 is attached to the cold source 32, heat generated by the cold source 32 is taken away, the radiator 33 is connected with the low-temperature constant-temperature groove 34, the medium in the radiator 33 is kept low temperature by the low-temperature constant-temperature groove 34, the environment refrigerant 35 is located inside the low-temperature environment box 31, the environment temperature inside the low-temperature environment box is reduced, the drying gas 36 is introduced into the low-temperature environment box, and the environment humidity inside the low-temperature environment box is reduced, so that impact behavior observation is prevented from being influenced by water vapor condensation.
The low-temperature environment box 31 is a thick-wall acrylic box with a certain heat insulation effect, a region can be divided in a room-temperature environment, a low-temperature environment with controllable temperature is created, the small-size transparent low-temperature environment box is favorable for reducing energy consumption, stabilizing the environment and relieving the limitation on the size of a camera, the influence of water vapor condensation on camera observation is avoided by introducing dry nitrogen, heat convection is enhanced by a fan, and the problem of nonuniform temperature in the low-temperature environment box is avoided.
The cold source 32 in this embodiment is a semiconductor refrigeration sheet.
The radiator 33 described in the present embodiment is a water-cooled radiator.
The ambient refrigerant 36 in this embodiment is liquid nitrogen and the drying gas is nitrogen.
As shown in fig. 1 and 2, the impact module includes: a surface 21 to be impacted and a surface pose adjustment mechanism and an additional component respectively connected with the surface 21 to be impacted, wherein: the surface to be impacted is connected with the detection table through the surface pose adjusting mechanism, and the liquid to be impacted is impacted at a proper position of the surface to be impacted through adjusting the surface pose adjusting mechanism.
As shown in fig. 2, the surface pose adjusting mechanism includes: a three-axis electric angular stage 22 and a three-axis electric displacement stage 23 which are disposed in this order below the surface 21 to be impacted.
The additional component comprises: a multi-path air pump 26 and a positive pressure air pump 24 and a negative pressure air pump 25 respectively connected with the multi-path air pump.
As shown in fig. 3, the surface to be impacted 21 includes: the hydrophobic coating 1, the film layer 2, the chamber layer 3, the electrode layer 4 and the substrate layer 5 are sequentially arranged from top to bottom, wherein: the edge of the film layer 2 is fixed above the cavity layer 3 serving as a rigid frame, a closed cavity communicated with the additional component is formed in the middle of the cavity layer 3, and the surface morphology, mechanical property and hydrophile-hydrophobic property of the surface to be impacted are flexibly adjusted in real time by adjusting the output air pressure of the additional component.
The film layer 2 described in this embodiment is a polydimethylsiloxane film.
The electrode layer in this embodiment is copper foil.
The impact behavior observation module adopts an electrical measurement device as a supplementary measurement means of the high-speed camera, effectively avoids the problems of structural shielding and light interference faced by the optical measurement means, has resolution and data processing speed superior to those of the high-speed camera when measuring droplet characteristics (such as droplet bounce times), and comprises: high-speed cameras 41, 42, a light source 43, a camera pose adjustment mechanism 44, and an electrical measurement device 45, wherein: the high-speed cameras 41, 42 shoot the action of impacting the liquid to be impacted on the surface to be impacted in the low-temperature environment box from two angles at the same time, the light source 43 is matched with the high-speed cameras to provide the brightness of the shot object, the high-speed cameras and the light source are connected with the environment through the camera pose adjusting mechanism 44, and the high-speed cameras can clearly and accurately shoot the action of impacting the low-temperature liquid drops by adjusting the camera pose adjusting mechanism.
The high-speed camera described in this embodiment is a binocular high-speed camera.
The electrical measurement device 45 in this embodiment is an electrometer or an oscilloscope, and through a sensor fusion technology, the problems of structural shielding and light interference faced by high-speed camera measurement are compensated by using electrical signals.
The control module comprises: impact behavior control unit, temperature control unit and flexible surface control unit, wherein: the temperature control unit changes the power of a cold source, the set temperature of a low-temperature constant-temperature tank and the speed of a fan according to temperature and humidity information acquired by a hygrothermograph, the temperature and humidity in the low-temperature environment tank are controlled in a closed loop mode through a PID method, the impact behavior control unit adjusts the extrusion speed and the extrusion height of the liquid extrusion device through a motor according to the expected impact speed, the impact angle, the impact position and the like input by an experimenter, the pose of the liquid drop pose adjusting mechanism and the pose of the surface pose adjusting mechanism, and the flexible surface control unit realizes different forms of a flexible surface through changing the opening and closing, the positive and the negative and the size of air pressure of an additional component according to the expected surface form input by the experimenter.
Through specific practical experiments, in the environment of the temperature of 20 ℃ below zero, the diameter of the liquid drop of 2mm and the impact height of 60mm, the icing phenomenon of the liquid drop shot by the high-speed camera and shot by the high-speed camera on the flexible surface shown in figure 4 and the liquid drop bouncing behavior in the impact process measured by the electrometer shown in figure 5 are obtained through the device, wherein each group of negative peaks and positive peaks represent one bounce, and the gradual reduction of the peak value of the current peak represents the gradual reduction of the bouncing amplitude.
Compared with the prior art, the device adopts the electrical measurement equipment as a supplementary measurement means of the high-speed camera, so that the problems of structural shielding and light interference faced by the optical measurement means are effectively avoided, and the device has better resolution and data processing speed than the high-speed camera when measuring characteristics such as the number of liquid drop bounces. Through the experimental apparatus of automation, provide even stable low temperature environment, reduced human error.
The foregoing embodiments may be partially modified in numerous ways by those skilled in the art without departing from the principles and spirit of the invention, the scope of which is defined in the claims and not by the foregoing embodiments, and all such implementations are within the scope of the invention.

Claims (9)

1.一种低温环境下的液滴冲击柔性表面自动化实验装置，其特征在于，包括：控制模块以及分别与之相连的液滴生成模块、冲击模块、低温环境生成模块和冲击行为观测模块，其中：液滴生成模块和冲击模块依次上下相对设置，低温环境生成模块设置于冲击模块的外部，冲击行为观测模块正对冲击模块；1. An automated experimental device for droplet impacting a flexible surface under a low temperature environment, characterized in that it comprises: a control module and a droplet generation module, an impact module, a low temperature environment generation module and an impact behavior observation module respectively connected thereto, wherein: the droplet generation module and the impact module are arranged opposite to each other in sequence, the low temperature environment generation module is arranged outside the impact module, and the impact behavior observation module is directly opposite to the impact module; 所述的液滴生成模块包括：待冲击液体、液体盛装容器、液体挤出设备和位姿调整机构，其中：待冲击液体盛装在液体盛装容器中，由液体挤出设备挤出；液体挤出设备经连接件连接于位姿调整机构，通过调节液体挤出设备和位姿调整机构形成具有不同特征的流体。The droplet generation module includes: a liquid to be impacted, a liquid container, a liquid extrusion device and a posture adjustment mechanism, wherein: the liquid to be impacted is contained in the liquid container and is extruded by the liquid extrusion device; the liquid extrusion device is connected to the posture adjustment mechanism via a connecting piece, and fluids with different characteristics are formed by adjusting the liquid extrusion device and the posture adjustment mechanism. 2.根据权利要求1所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的低温环境生成模块包括：低温环境箱、冷源、散热器、低温恒温槽、环境制冷剂、风扇和温湿度计，其中：冷源位于低温环境箱内部，散热器附于冷源，将冷源所产生的热量带离，散热器与低温恒温槽相连接，低温恒温槽使散热器中的介质保持低温，环境制冷剂位于低温环境箱内部，将低温环境箱内部的环境温度降低，干燥气体通入低温环境箱，将低温环境箱内部的环境湿度降低，以避免水蒸气凝结影响冲击行为观测。2. According to the automated experimental device for droplet impact on flexible surface in low temperature environment in claim 1, it is characterized in that the low temperature environment generation module comprises: a low temperature environment box, a cold source, a radiator, a low temperature constant temperature bath, an environmental refrigerant, a fan and a thermometer and hygrometer, wherein: the cold source is located inside the low temperature environment box, the radiator is attached to the cold source to take away the heat generated by the cold source, the radiator is connected to the low temperature constant temperature bath, the low temperature constant temperature bath keeps the medium in the radiator at a low temperature, the environmental refrigerant is located inside the low temperature environment box to reduce the ambient temperature inside the low temperature environment box, dry gas is introduced into the low temperature environment box to reduce the ambient humidity inside the low temperature environment box to avoid water vapor condensation affecting the impact behavior observation. 3.根据权利要求1或2所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的冲击模块包括：待冲击表面以及分别与之相连的表面位姿调整机构和附加组件，其中：待冲击表面通过表面位姿调整机构与检测台连接，通过调节表面位姿调整机构，使得待冲击液体冲击在待冲击表面的合适位置。3. According to the automated experimental device for droplet impact on flexible surface in low temperature environment in claim 1 or 2, it is characterized in that the impact module comprises: a surface to be impacted and a surface posture adjustment mechanism and additional components respectively connected thereto, wherein: the surface to be impacted is connected to the detection platform through the surface posture adjustment mechanism, and by adjusting the surface posture adjustment mechanism, the liquid to be impacted impacts the appropriate position of the surface to be impacted. 4.根据权利要求3所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的待冲击表面包括：由上而下依次设置的疏水涂层、薄膜层、腔室层、电极层和基底层，其中：薄膜层的边缘固定于作为刚性框架的腔室层上方，腔室层中间形成与附加组件相连通的密闭腔室，通过调节附加组件的输出气压，实时柔性调整待冲击表面的表面形态、力学性能和亲疏水特性。4. The automated experimental device for droplet impact on flexible surface under low temperature environment according to claim 3 is characterized in that the surface to be impacted comprises: a hydrophobic coating, a thin film layer, a chamber layer, an electrode layer and a base layer arranged in sequence from top to bottom, wherein: the edge of the thin film layer is fixed above the chamber layer which serves as a rigid frame, and a closed chamber connected to the additional component is formed in the middle of the chamber layer, and the surface morphology, mechanical properties and hydrophilic and hydrophobic properties of the surface to be impacted can be flexibly adjusted in real time by adjusting the output air pressure of the additional component. 5.根据权利要求4所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的薄膜层为聚二甲基硅氧烷薄膜；所述的电极层为铜箔。5. The automated experimental device for droplet impact on flexible surface in low temperature environment according to claim 4, characterized in that the film layer is a polydimethylsiloxane film; and the electrode layer is a copper foil. 6.根据权利要求5所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的控制模块分别向液体挤出设备、液滴位姿调整机构、表面位姿调整机构附加组件、冷源、低温恒温槽、风扇、高速相机光源、相机位姿调整机构、发出控制指令并采集液体挤出设备的挤出速度与高度，液滴位姿调整机构的位姿，表面位姿调整机构、的位姿，附加组件的气压，低温恒温槽的温度，风扇的速度，温湿度计采集到的温湿度信息，高速相机、采集到的图像信息，电学测量设备采集到的电学信息。6. According to the automated experimental device for droplet impact on flexible surface under low temperature environment as described in claim 5, it is characterized in that the control module respectively sends control instructions to the liquid extrusion equipment, droplet posture adjustment mechanism, surface posture adjustment mechanism additional components, cold source, low temperature constant temperature bath, fan, high-speed camera light source, camera posture adjustment mechanism, and collects the extrusion speed and height of the liquid extrusion equipment, the posture of the droplet posture adjustment mechanism, the posture of the surface posture adjustment mechanism, the air pressure of the additional components, the temperature of the low temperature constant temperature bath, the speed of the fan, the temperature and humidity information collected by the thermometer and hygrometer, the image information collected by the high-speed camera, and the electrical information collected by the electrical measuring equipment. 7.根据权利要求6所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的表面位姿调整机构包括：依次设置于待冲击表面下的三轴电动角位台和三轴电动位移台。7. The automated experimental device for droplet impact on flexible surface in low temperature environment according to claim 6 is characterized in that the surface posture adjustment mechanism comprises: a three-axis electric angular position table and a three-axis electric displacement table which are sequentially arranged under the surface to be impacted. 8.根据权利要求1所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的冲击行为观测模块包括：高速相机光源、相机位姿调整机构和电学测量设备，其中：高速相机、从两个角度同时拍摄待冲击液体在低温环境箱内冲击待冲击表面的行为，光源与高速相机配套使用以提供被拍摄物的亮度，高速相机与光源通过相机位姿调整机构与环境连接，通过调节相机位姿调整机构使得高速相机清晰准确地拍摄到低温液滴冲击行为。8. According to the automated experimental device for droplet impact on flexible surface in low temperature environment in claim 1, it is characterized in that the impact behavior observation module comprises: a high-speed camera light source, a camera posture adjustment mechanism and an electrical measurement device, wherein: the high-speed camera simultaneously photographs the behavior of the liquid to be impacted impacting the surface to be impacted in the low temperature environment box from two angles, the light source is used in conjunction with the high-speed camera to provide brightness for the object to be photographed, the high-speed camera and the light source are connected to the environment through the camera posture adjustment mechanism, and the camera posture adjustment mechanism is adjusted so that the high-speed camera can clearly and accurately photograph the low-temperature droplet impact behavior. 9.根据权利要求1或8所述的低温环境下的液滴冲击柔性表面自动化实验装置，其特征是，所述的控制模块包括：冲击行为控制单元、温度控制单元以及柔性表面控制单元，其中：温度控制单元根据温湿度计采集到的温湿度信息，改变冷源的功率、低温恒温槽的设定温度与风扇的速度，用PID方法闭环控制低温环境箱内的温湿度，冲击行为控制单元根据输入的期望冲击速度、冲击角度、冲击位置，通过电机调整液体挤出设备的挤出速度与高度，液滴位姿调整机构的位姿，表面位姿调整机构的位姿，柔性表面控制单元根据实验人员输入的期望表面形态，通过更改附加组件的气压开闭、正负、大小，实现柔性表面的不同形态。9. The automated experimental device for droplet impact on flexible surface in low temperature environment according to claim 1 or 8 is characterized in that the control module comprises: an impact behavior control unit, a temperature control unit and a flexible surface control unit, wherein: the temperature control unit changes the power of the cold source, the set temperature of the low temperature constant temperature bath and the speed of the fan according to the temperature and humidity information collected by the thermometer and hygrometer, and uses the PID method to close-loop control the temperature and humidity in the low temperature environment box; the impact behavior control unit adjusts the extrusion speed and height of the liquid extrusion equipment, the posture of the droplet posture adjustment mechanism, and the posture of the surface posture adjustment mechanism through a motor according to the input expected impact speed, impact angle, and impact position; the flexible surface control unit realizes different forms of the flexible surface by changing the air pressure opening and closing, positive and negative, and size of the additional components according to the expected surface morphology input by the experimenter.
CN202410682699.8A 2024-05-29 2024-05-29 Automated experimental device for droplet impact on flexible surface in low temperature environment Pending CN118645034A (en)

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