A pressure scanning measurement system and scanning method for nanocomposite coating fields

Abstract

This invention provides a pressure scanning measurement system and method for a nanocomposite material spraying field. It primarily addresses the need for pre-calibration of the manufacturing system before the formal fabrication of nanocomposite films using additive manufacturing technology, thereby eliminating potential production problems. The invention involves arranging a series of tube arrays in the spraying field, connecting these arrays to sensors, using a measurement module to obtain the pressure values ​​at the locations of the tube arrays, and using a scanning module to change the positions of the tube arrays within the spraying field. Finally, based on the measured pressure data, imaging can be performed to obtain the two-dimensional or three-dimensional pressure distribution of the spraying field. The pressure distribution image obtained using the method proposed in this invention can be used to determine whether the spray gun is functioning properly, thus achieving pre-calibration of the spraying manufacturing system. This provides a solution for the stable fabrication of high-quality nanocomposite films.

Description

Technical Field

[0001] This invention belongs to the field of nanocomposite material spraying technology, specifically relating to a method for pressure scanning measurement of nanocomposite material spraying field. Background Technology

[0002] Nanocomposites, due to their superior enhanced properties, are widely used in fields such as flexible sensing, structural protection, and electromagnetic shielding of equipment. In these applications, nanocomposites primarily function in the form of thin films. Additive manufacturing technology is an advanced method for preparing nanocomposite films, with inkjet printing and spraying being two typical processes.

[0003] Inkjet printing offers high manufacturing precision, but it places extremely high demands on nanocomposite inks. For example, nanocomposite inks must be filtered through microporous membranes before printing; otherwise, the printhead is easily clogged. This requirement prevents many inks using materials such as carbon nanotubes, carbon nanofibers, and graphene nanosheets as nanofillers from being inkjet printed into films, even though these nanofillers often possess superior properties. This severely limits the development of high-performance nanocomposite films.

[0004] Before formally fabricating nanocomposite films using additive manufacturing technology, the manufacturing system must be pre-tested to eliminate potential production problems; otherwise, manufacturing damage may occur in the film. For example, in inkjet printing, a high-speed camera is typically used to measure droplets before actual printing, and then the ink droplet morphology is optimized by adjusting process parameters. In contrast, with spray coating, operators usually rely on experience to adjust the spray gun before actual spraying. Improper adjustment can clog the printhead, leading to film rejection. Furthermore, improper adjustment can also cause problems such as overspray or bounce.

[0005] While the spraying process can be adjusted visually, such as using a high-speed camera to capture the spray flow field and obtaining information like the atomization cone angle and droplet size through image processing, this method is susceptible to ambient light, has high equipment costs, and low computational efficiency. Other methods, such as laser particle size analyzers and phase Doppler anemometers, are even more expensive and have lower computational efficiency. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a pressure scanning measurement system and scanning method for nanocomposite spraying fields. This invention can obtain the two-dimensional and three-dimensional pressure distribution of the spraying field, assist in the pre-adjustment of the spraying manufacturing system, and thus realize the stable preparation of high-performance nanocomposite film.

[0007] The technical solution adopted by this invention to solve its technical problem is a nanocomposite material spraying pressure field scanning measurement system, including a spraying field, a spray gun, a tube array, a measurement module, a scanning module, and a host computer; the spray gun is arranged in the spraying field; the scanning module includes a motion platform, a driver, a controller, and a first power module; the controller is connected to the driver; the driver is connected to the motor of the motion platform; the first power module is connected to both the driver and the controller to provide power; the direction, displacement, and speed parameters of the motion platform are set by the controller; the measurement module includes a sensor, a conditioner, an analog-to-digital converter, a microcontroller, a transceiver, and a second power module; the sensor is connected to the conditioner; the conditioner is connected to the analog-to-digital converter; the analog-to-digital converter is connected to the microcontroller; The microcontroller is connected to the transceiver; the transceiver is connected to the host computer; the second power module is connected to the sensor, conditioner, analog-to-digital converter, microcontroller, and transceiver to provide power support; the measurement module consists of one sensor and one conditioner as a group; the tube array includes a clamp and a T-tube; the T-tube is a T-shaped three-way tube; one end of the straight tube of the T-tube is open for introducing compressed air and nanocomposite material droplets; the other end of the straight tube of the T-tube is provided with a sleeve to allow the nanocomposite material to be deposited inside the T-tube; the branch port of the T-tube is provided with an air tube; the air tube is connected to the measurement interface of the sensor; the top surface of the clamp is provided with a through hole; the T-tube is placed in the through hole; the end of the T-tube with the sleeve is inserted into the through hole; the clamp is used to install the T-tube and fix it to the motion platform.

[0008] Furthermore, the sensor includes a measurement interface and a normally open interface; the normally open interface has no connection.

[0009] Furthermore, the measurement module also includes several sets of sensors and conditioners.

[0010] Furthermore, the top surface of the fixture has several through holes.

[0011] Furthermore, the several through holes on the top surface of the fixture are arranged linearly.

[0012] Furthermore, the sensor is an SM5651; the conditioner is an NSA2860; the analog-to-digital converter is an AD7606; the microcontroller is an STM32F103ZET6; and the transceiver is an nRF24L01.

[0013] A scanning measurement method using a nanocomposite material spraying pressure field scanning measurement system includes the following steps: setting the tube array directly below the spray gun, translating the motion platform in the horizontal plane, obtaining pressure data inside the T-tube in the horizontal plane using the sensor, and drawing a two-dimensional pressure distribution image of the nanocomposite material spraying field based on the obtained pressure data using the host computer.

[0014] A scanning measurement method using a nanocomposite material spraying pressure field scanning measurement system includes the following steps: changing the distance between the spray gun and the tube array, the sensor obtaining pressure data in the T-shaped tube in the direction perpendicular to the horizontal plane, and the host computer drawing a three-dimensional pressure distribution image of the nanocomposite material spraying field based on the obtained pressure data.

[0015] The beneficial effects of this invention are as follows: This invention discloses a method for scanning and measuring the pressure field of nanocomposite material spraying atomization. By arranging a series of tube arrays in the spraying field and connecting the tube arrays to sensors, a measurement module obtains the pressure value at the location of the tube arrays, and a scanning module changes the position of the tube arrays in the spraying field. Finally, based on the measured pressure data, imaging can be performed to obtain the two-dimensional or three-dimensional pressure distribution of the spraying field. The pressure distribution image measured using the method proposed in this invention can be used to determine whether the spray gun is working properly, achieving pre-tuning of the spraying manufacturing system. Attached Figure Description

[0016] Figure 1 A schematic diagram of the composition of a pressure scanning measurement system for a nanocomposite coating field.

[0017] Figure 2 A schematic diagram showing the installation of key components in a pressure scanning measurement system for nanocomposite coating fields.

[0018] Figure 3 For T-type transistors in a transistor array;

[0019] Figure 4 For measurement modules;

[0020] Figure 5 Coordinate definition diagram for pressure scanning measurement system of nanocomposite spraying field;

[0021] Figure 6 The images are two-dimensional pressure distribution images; where (a) is the image before debugging and (b) is the image after debugging.

[0022] Figure 7 A three-dimensional pressure distribution image;

[0023] Among them, 1-robotic arm, 2-spray gun, 3-tube array, 4-clamp, 5-measuring module, 6-motion platform, 7-T-tube with open straight pipe port, 8-T-tube with sealed straight pipe port, 9-T-tube branch port, 10-sensor measurement interface, 11-sensor normally open interface, and h is the distance between the spray gun and the tube array. Detailed Implementation

[0024] The technical solution adopted by the present invention to solve its technical problem is a nanocomposite material spraying pressure field scanning measurement system, including a spraying field, a spray gun, a tube array, a measurement module, a scanning module and a host computer;

[0025] Spray guns are installed in the spraying area;

[0026] The scanning module includes a motion platform, a driver, a controller, and a first power module; the controller is connected to the driver; the driver is connected to the motor of the motion platform; the first power module is connected to both the driver and the controller to provide power; the controller sends pulse signals to the driver, and the driver provides power to the motor of the motion platform based on the pulse signals to drive the motion platform to start moving; the direction, displacement, and speed parameters of the motion platform are set by the controller.

[0027] The measurement module includes a sensor, a conditioner, an analog-to-digital converter (ADC), a microcontroller, a transceiver, and a second power module. The sensor is connected to the conditioner; the conditioner is connected to the ADC; the ADC is connected to the microcontroller; the microcontroller is connected to the transceiver; and the transceiver is connected to a host computer. The second power module provides power to the sensor, conditioner, ADC, microcontroller, and transceiver. Each measurement module consists of one sensor and one conditioner. The sensor outputs an analog electrical signal, which is converted by the conditioner and then acquired by the ADC. The microcontroller receives the acquired data from the ADC and sends it to the transceiver, which ultimately transmits the data to the host computer.

[0028] The sensor includes a measurement interface and a normally open interface; the normally open interface has no connection.

[0029] The measurement module also includes several sets of sensors and conditioners;

[0030] The tube array includes a clamp and a T-tube; the T-tube is a T-shaped three-way tube; one end of the straight tube of the T-tube is open for introducing compressed air and nanocomposite material droplets; the other end of the straight tube of the T-tube is provided with a sleeve to allow the nanocomposite material to be deposited inside the T-tube; the branch port of the T-tube is provided with an air tube; the air tube is connected to the measurement interface of the sensor.

[0031] The fixture has a through hole on its top surface; a T-shaped tube is installed inside the through hole; one end of the T-shaped tube with a sleeve is inserted into the through hole; the fixture is used to install the T-shaped tube and fix it to the motion platform.

[0032] The top surface of the fixture has several through holes; the several through holes on the top surface of the fixture are arranged linearly.

[0033] The sensor is SM5651; the conditioner is NSA2860; the analog-to-digital converter is AD7606; the microcontroller is STM32F103ZET6; and the transceiver is nRF24L01.

[0034] A scanning measurement method using a nanocomposite material spraying pressure field scanning measurement system is employed. The tube array is positioned directly below the spray gun, and the motion platform is moved horizontally. The sensor obtains the pressure data inside the T-tube on the horizontal plane. Based on the obtained pressure data, a two-dimensional pressure distribution image of the nanocomposite material spraying field is plotted.

[0035] A scanning measurement method using a nanocomposite material spraying pressure field scanning measurement system is employed. By changing the distance between the spray gun and the tube array, the sensor obtains pressure data in the T-shaped tube in the direction perpendicular to the horizontal plane. Based on the obtained pressure data, a three-dimensional pressure distribution image of the nanocomposite material spraying field is plotted.

[0036] The present invention will be further described below with reference to the accompanying drawings and examples.

[0037] Figure 1 This diagram illustrates a pressure scanning measurement method for a nanocomposite material spraying field. To achieve pressure scanning measurement in a spraying field, a measurement module for acquiring pressure data and a scanning module for changing the position of the tube array need to be designed. The measurement module includes a sensor, conditioner, analog-to-digital converter (ADC), microcontroller, transceiver, and power supply. The sensor outputs an analog electrical signal corresponding to the pressure at the location of the tube array. This analog signal is converted by the conditioner and then acquired by the ADC. The microcontroller receives the acquired data from the ADC and sends it to the transceiver. The transceiver ultimately transmits the data to a host computer, which performs pressure distribution imaging based on the pressure data. The power supply powers the measurement module. The scanning module consists of a motion platform, driver, controller, and power supply. A rotational motion platform is used to change the position of the tube array. The direction, displacement, and speed of the platform's motion can be set by the controller. The controller sends pulse signals to the driver based on the set parameters. The driver then powers the motor of the motion platform based on these pulse signals to start the motion platform's movement. The power supply primarily powers the driver and controller.

[0038] Figure 2 This is a schematic diagram of the installation of a pressure scanning measurement method for nanocomposite coating fields. The spray gun is mounted on a robotic arm, and the tube array is located directly below the spray gun. Both the tube array and the measurement module are mounted on a fixture, which in turn is mounted on a motion platform. The tube array consists of two or more T-shaped tubes arranged in a straight line. Figure 3This is a T-shaped tube in the tube array. Each T-shaped tube has three ports, the direction of which is defined as the normal direction of the port's outlet surface. Two ports with parallel directions are directly connected. The direction of the third port is perpendicular to the directions of the two directly connected ports, and the third port is a branch port of the T-shaped tube. The open port of the straight-through port 1 is used to introduce compressed air and nanocomposite material droplets. The closed port of the straight-through port 2 is fitted with a sleeve to allow the nanocomposite material to deposit inside the T-shaped tube. The third port is connected to the sensor in the measurement module through an air tube. The position of the T-shaped tube is defined as the center coordinate of the outlet surface of the upward-facing straight-through port 1. Figure 4 The measurement module is shown. Each sensor in the measurement module has two interfaces: a measurement interface and a normally open interface. The measurement interface is connected to the third interface of the T-tube through a trachea, while the normally open interface remains open and unconnected.

[0039] Figure 5 This is a coordinate definition diagram for the pressure scanning measurement method in a nanocomposite spraying field. When the motion platform rotates in the XOY plane, the two-dimensional pressure distribution in the spraying field can be obtained. By driving the robotic arm to move, the height h between the spray gun and the tube array can be adjusted. By adjusting the height h and driving the motion platform to rotate in the XOY plane at each h, the three-dimensional pressure distribution in the spraying field can be obtained.

[0040] This invention provides a design example. Pressure measurement is performed using an SM5651 sensor, which outputs a voltage signal corresponding to the pressure. Since the voltage signal is very weak, each SM5651 sensor is connected to an NSA2860 conditioner to amplify its output signal. The amplified voltage signal is acquired by an AD7606 analog-to-digital converter. The AD7606 has eight parallel acquisition channels, indicating that a tube array consisting of eight T-tubes can be set up in the spraying area. An STM32F103ZET6 processor is selected as the core of the measurement module. The STM32F103ZET6 receives the data acquired by the AD7606 and sends the data to an nRF24L01 wireless transceiver, which then transmits the data to the host computer. The measurement module is powered by a lithium battery. To meet the different power supply requirements of various devices, HT7133, HT7150, and SX1308 chips are used to implement voltage conversions of 3.3V (STM32F103ZET6), 5.0V (AD7606 and nRF24L01), and 18.0V (NSA2860), respectively. It is important to emphasize that each NSA2860 regulator not only transforms the output signal of the SM5651 sensor but also provides current excitation to drive the SM5651 sensor. Figure 4The measurement module shown was used, and a rotating motion platform was employed to scan and measure the pressure of the nanocomposite spraying field, obtaining... Figure 4 The two-dimensional pressure distribution is shown. Figure 6 The two-dimensional pressure distribution is shown with and without adjustment of the spray gun, demonstrating that the pressure distribution measured by the method of this invention can be used to assist in the pre-tuning of the spraying manufacturing system, thereby achieving the stable preparation of high-performance nanocomposite films. Figure 5 The experiment demonstrates how adjusting the height h and driving the motion platform to rotate in the XOY plane at each h point can yield the three-dimensional pressure distribution in the spraying field.

Claims

1. A pressure scanning measurement system for a nanocomposite material spraying field, characterized in that: The system includes a spraying area, spray guns, a pipe array, a measurement module, a scanning module, and a host computer. The spray guns are installed within the spraying area. The scanning module includes a motion platform, a driver, a controller, and a first power module. The controller is connected to the driver; the driver is connected to the motor of the motion platform; the first power module is connected to both the driver and the controller to provide power. The direction, displacement, and speed parameters of the motion platform are set via the controller. The measurement module includes a sensor, a conditioner, an analog-to-digital converter (ADC), a microcontroller, a transceiver, and a second power module. The sensor is connected to the conditioner; the conditioner is connected to the ADC; the ADC is connected to the microcontroller; the microcontroller is connected to the transceiver; and the transceiver is connected to the host computer. The second power module is connected to the sensor, conditioner, analog-to-digital converter, microcontroller, and transceiver to provide power support. The measurement module consists of one sensor and one conditioner as a group. The tube array includes a clamp and a T-tube. The T-tube is a T-shaped three-way tube. One end of the straight tube of the T-tube is open for introducing compressed air and nanocomposite material droplets. The other end of the straight tube of the T-tube is sealed to allow the nanocomposite material to deposit inside the T-tube. An air tube is installed at the branch port of the T-tube. The air tube connects to the sensor's measurement interface. A through hole is provided on the top surface of the clamp. The T-tube is installed inside the through hole. One end of the T-tube with the sealed end is inserted into the through hole. The clamp is used to install the T-tube and fix it to the motion platform.

2. The pressure scanning measurement system for a nanocomposite material spraying field according to claim 1, characterized in that: The sensor includes a measurement interface and a normally open interface; the normally open interface has no connection.

3. The pressure scanning measurement system for a nanocomposite material spraying field according to claim 1, characterized in that: The measurement module also includes several sets of sensors and conditioners.

4. The pressure scanning measurement system for a nanocomposite material spraying field according to claim 1, characterized in that: The top surface of the fixture has several through holes.

5. The pressure scanning measurement system for a nanocomposite material spraying field according to claim 1, characterized in that: The clamp has several through holes on its top surface arranged in a linear pattern.

6. The pressure scanning measurement system for a nanocomposite material spraying field according to claim 1, characterized in that: The sensor is SM5651; the conditioner is NSA2860; the analog-to-digital converter is AD7606; the microcontroller is STM32F103ZET6; and the transceiver is nRF24L01.

7. A scanning method using the pressure scanning measurement system for a nanocomposite material spraying field as described in any one of claims 1 to 6, characterized in that: The tube array is positioned directly below the spray gun, allowing the motion platform to translate horizontally. The sensor obtains pressure data inside the T-tube on the horizontal plane, and the host computer generates a two-dimensional pressure distribution image of the nanocomposite material spraying field based on the obtained pressure data.

8. The scanning method of the pressure scanning measurement system for a nanocomposite material spraying field according to claim 7, characterized in that: By changing the distance between the spray gun and the tube array, the sensor obtains pressure data in the direction perpendicular to the horizontal plane inside the T-tube. Based on the obtained pressure data, the host computer draws a three-dimensional pressure distribution image of the nanocomposite material spraying field.

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