A visualization system and method for monitoring an electromagnetic environment in a space

Abstract

The application discloses a kind of visual system and method for monitoring electromagnetic environment in space, the system includes visual processing center and multiple visual detection devices arranged in different regions of monitoring space;The visual detection device includes wideband antenna, power detector, analog-digital converter, microcontroller, color-changing LED and RFID tag;The visual processing center includes central processing unit, display, RFID reader and writer with scanning range covering the entire monitoring space, and video image acquisition module with shooting range covering the entire monitoring space.The application has the advantages of miniaturization, low cost, low power consumption, visualization, and can be suitable for large volume data reading.

Description

Technical Field

[0001] This invention relates to electromagnetic environment monitoring, and in particular to a visualization system and method for monitoring the electromagnetic environment in space. Background Technology

[0002] Electromagnetic radiation can cause serious harm in a short period of time. Taking engine fuel as an example, electromagnetic radiation exceeding the threshold can ignite fuel on a microsecond scale, instantly causing severe consequences. Therefore, rapid and real-time electromagnetic environment monitoring methods are needed.

[0003] The electromagnetic environment is becoming increasingly complex in the context of intelligent connected vehicles. Taking the road environment faced by intelligent vehicles as an example, monitoring the spatial distribution of the electromagnetic environment in the entire panorama is the foundation for ensuring the safety of intelligent vehicles. Therefore, large-scale and low-cost monitoring methods are needed.

[0004] Therefore, under the new trend, there is an urgent need to study portable, visualized, fast-response, large-scale, and low-cost electromagnetic environment monitoring methods. Large-scale refers to distributed electromagnetic environment monitoring, which can achieve simultaneous monitoring of a large number of channels; this requires the portability and low cost of individual monitoring systems. Visualization refers to the physical implementation of color changes based on field strength, to meet the needs of rapid and intuitive display of field strength.

[0005] Commonly used electromagnetic radiation monitoring equipment includes spectrum analyzers, field strength meters, and microwave leakage detectors. Although they are powerful and have high measurement accuracy, they are limited by mobility and cost. In addition, due to budget and testing space constraints, it is difficult to provide large-scale detection, and the readings based on screen displays are often not intuitive enough.

[0006] Portable electromagnetic radiation monitoring devices strike a trade-off between system performance and size, offering advantages such as small size, low cost, and low power consumption. Therefore, the number of channels can be expanded by deploying multiple small systems using a distributed approach; however, how to expand this capacity remains a challenge. Wired transmission methods such as cables or fiber optics offer high reliability but compromise system portability. Achieving low-cost, high-efficiency networking of large-scale sensor networks using wireless methods is difficult. Furthermore, portable electromagnetic radiation monitoring devices also suffer from insufficiently intuitive display. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a visualization system and method for monitoring the electromagnetic environment in space, which has the advantages of miniaturization, low cost, low power consumption, visualization, and is suitable for large-volume data reading.

[0008] The objective of this invention is achieved through the following technical solution: a visualization system for monitoring the electromagnetic environment in space, comprising a visualization processing center and multiple visualization detection devices set in different areas of the monitoring space;

[0009] The visual detection device includes a broadband antenna, a power detector, an analog-to-digital converter, a microcontroller, a color-changing LED, and an RFID tag;

[0010] The broadband antenna is used to receive electromagnetic wave signals in its area and transmit them to a power detector. The power detector detects the electromagnetic wave signals output by the broadband antenna and outputs a level information reflecting the signal strength. The output level information is transmitted to a microcontroller via an analog-to-digital converter. The microcontroller converts the digital signal obtained from the level information into RGB values ​​and controls the color-changing LEDs to produce different colors based on the RGB values. Simultaneously, the digital signal obtained from the level information is written into an RFID tag.

[0011] The visualization processing center includes a central processing unit (CPU), a display, an RFID reader / writer with a scanning range covering the entire monitoring space, and a video image acquisition module with a shooting range covering the entire monitoring space. Both the RFID reader / writer and the video acquisition module are connected to the CPU, which is also connected to the display. The CPU transmits the video images acquired by the video image acquisition module to the display for visualization of the electromagnetic environment. Simultaneously, it transmits the digital signals of the tag numbers and voltage levels collected by the RFID readers in each visualization detection device to the display for precise display.

[0012] A visualization method for monitoring the electromagnetic environment in space includes the following steps:

[0013] S1. The visualization system is calibrated to obtain the RGB difference values ​​at each visualization detection device and transmit them to each visualization detection device;

[0014] S2. After calibration, begin collecting and processing the electromagnetic environment in the monitoring space;

[0015] S3. Information is collected using RFID readers and video image acquisition modules, and the electromagnetic environment is visualized.

[0016] The beneficial effects of this invention are as follows: This invention is used to monitor electromagnetic radiation in space. Compared with existing electromagnetic radiation monitoring equipment such as spectrum analyzers, field strength meters, and microwave leakage detectors, it has advantages in miniaturization, low cost, low power consumption, and visualization. Most importantly, its test data reading methods (image acquisition and RFID) are very suitable for reading large volumes of data. The system is highly efficient in visually representing field strength and can have a flexible, flat design to adapt to mobile scenarios and the need for detection on complex curved surfaces. It can be used in various occasions requiring electromagnetic radiation monitoring. For example, in gas stations, different colors are used depending on the sensitivity threshold of the fuel to electromagnetic radiation; when the threshold is exceeded, it turns red, serving as a warning.

[0017] These advantages of the unit system enable its large-scale, distributed deployment in the monitored environment, providing real-time and intuitive display of electromagnetic radiation intensity over a region. It visualizes and pixelates electromagnetic radiation, achieving high spatial resolution panoramic real-time radiation detection. This is of great significance for understanding the distribution of environmental electromagnetic radiation, rapidly locating radiation sources, and issuing warnings of electromagnetic hazards. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the principle of the present invention;

[0019] Figure 2 This is a schematic diagram of the visualization detection device of this application;

[0020] Figure 3 This is a flowchart of the method of the present invention. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0022] This invention achieves high spatial resolution, panoramic real-time radiation detection by arranging multiple electromagnetic environment sensing and visualization units in space, thereby enabling pixelated electromagnetic radiation detection. For example, arranging multiple electromagnetic sensing units in a room divides the space into a pixel grid. Each pixel changes color in real time according to the spatial field strength, reflecting the field strength distribution within a region. Then, by taking a picture, the RGB value of each unit can be obtained, thus acquiring the corresponding field strength value for each unit. An RFID chip is integrated into each visualization unit system. Leveraging the suitability of RFID technology for large-volume readings, after the field strength value is measured by a unit, the data from different units is read using an RFID reader. Specifically:

[0023] like Figures 1-2 As shown, a visualization system for monitoring the electromagnetic environment in space includes a visualization processing center and multiple visualization detection devices set in different areas of the monitoring space.

[0024] The visual detection device includes a broadband antenna, a power detector, an analog-to-digital converter, a microcontroller, a color-changing LED, and an RFID tag;

[0025] The broadband antenna is used to receive electromagnetic wave signals in its local area and transmit them to a power detector. The power detector detects the electromagnetic wave signals output by the broadband antenna and outputs a level information reflecting the signal strength. This level information is then transmitted to a microcontroller via an analog-to-digital converter. The microcontroller converts the digital signal obtained from the level information into RGB values ​​and controls the color-changing LEDs to produce different colors based on the RGB values. Simultaneously, it writes the digital signal obtained from the level information into an RFID tag.

[0026] The visualization processing center includes a central processing unit (CPU), a display, an RFID reader / writer with a scanning range covering the entire monitoring space, and a video image acquisition module with a shooting range covering the entire monitoring space. Both the RFID reader / writer and the video acquisition module are connected to the CPU, which is also connected to the display. The CPU transmits the video images acquired by the video image acquisition module to the display for visualization of the electromagnetic environment. Simultaneously, it transmits the digital signals of the tag numbers and voltage levels collected by the RFID readers in each visualization detection device to the display for precise display.

[0027] In embodiments of this application, the visualization detection device further includes a power module for powering the entire device. The video acquisition module includes a camera for capturing video images of the entire monitoring space.

[0028] In the embodiments of this application, the RFID tag includes an RFID chip with a communication interface, and the RFID chip is connected to a microprocessor through the communication interface. In this embodiment, the RFID chip may be an RFID chip with an SPI communication interface, such as the EM4325 chip or the ROCKY100 chip, or an RFID chip with a UART communication interface, such as the SIC4310, or an RFID chip with an I2C communication interface, such as the NT3H1101 or the N24RF64.

[0029] Each of the aforementioned RFID tags has a unique number; the visualization processing center also includes a memory connected to the central processing unit, used to store the location of each numbered RFID tag in the monitoring space; after receiving the RFID tag number and the voltage level information in the tag read by the RFID reader, the central processing unit finds the location corresponding to the tag number, and transmits the found location together with the tag number and the voltage level information in the tag to the display for display;

[0030] The visual detection device is arranged in a rectangular array in the monitoring space. The visual detection device has M rows and N columns, and a total of M*N devices. The position of the RFID tag in the monitoring space, that is, the position of the visual detection device in the detection and control, refers to the number of rows and columns of the visual detection device to which the RFID tag belongs in the rectangular array.

[0031] like Figure 3 As shown, a visualization method for monitoring the electromagnetic environment in space includes the following steps:

[0032] S1. The visualization system is calibrated to obtain the RGB difference values ​​at each visualization detection device and transmit them to each visualization detection device;

[0033] S2. After calibration, begin collecting and processing the electromagnetic environment in the monitoring space;

[0034] S3. Information is collected using RFID readers and video image acquisition modules, and the electromagnetic environment is visualized.

[0035] In step S1, the method for calibrating the visualization system and obtaining the RGB difference values ​​at each visualization detection device includes any of the following:

[0036] First, a standard radiation source is used to irradiate the detection space;

[0037] In each visual detection device within the monitored space, a broadband antenna receives electromagnetic wave signals from its local area and transmits them to a power detector. The power detector detects the electromagnetic wave signals output by the broadband antenna and outputs a level information reflecting the signal strength. This level information is then transmitted to a microcontroller via an analog-to-digital converter. The microcontroller converts the digital signal obtained from the level information into RGB values ​​and controls the color-changing LEDs to produce different colors based on the RGB values. Simultaneously, the digital signal obtained from the level information is written into an RFID tag.

[0038] In the visualization processing center, RFID readers scan the RFID tags in each visualization detection device to obtain the digital signal converted from the location of each visualization detection device in the monitoring space and the detected level information. This signal is then converted into RGB values ​​and transmitted to the central processing unit (CPU). The video image acquisition module acquires video images in the monitoring space and transmits them to the CPU. Based on the acquired video images, the CPU extracts the RGB values ​​of the location of each visualization detection device and the color displayed by the color-changing LED at that location. The CPU subtracts the RGB value of the color-changing LED extracted from the location of each visualization detection device from the RGB value of the converted RGB value at that location to obtain the RGB calibration value for each visualization detection device's location.

[0039] The visualization processing center writes the RGB calibration value of each visualization detection device's location into the RFID tag of that device using an RFID reader;

[0040] Second, the visualization processing center sets the digital signal of the level information at the location of each visualization detection device, and writes the set digital signal of the level information into the RFID tag of each visualization detection device through an RFID reader, and then converts the set digital signal of the level information into RGB values.

[0041] In each visual detection device, the microprocessor reads the digital signal of the level information in the RFID tag, converts it into RGB values, and then controls the color-changing LED to produce different colors according to the RGB values;

[0042] In the visualization processing center, the video image acquisition module acquires video images in the monitoring space and transmits them to the central processing unit. The central processing unit extracts the RGB values ​​of the location of each visualization detection device and the color displayed by the color-changing LED at that location based on the acquired video images in the monitoring space. Then, it subtracts the RGB value obtained by converting the digital signal of the set level information at the location of each visualization detection device into the RGB value of the color-changing LED at that location to obtain the RGB calibration value at the location of each visualization detection device.

[0043] The visualization processing center writes the RGB calibration value of each visualization detection device's location into the RFID tag of that device using an RFID reader.

[0044] Step S2 includes the following sub-steps:

[0045] S201. In each visual detection device, the microprocessor deletes the digital signal of the level information saved by the RFID tag during the calibration process, and only retains the RFID tag number, the position of the visual detection device in the monitoring space saved in the RFID tag, and the RGB calibration value.

[0046] S202. The power detector detects the antenna output signal and generates a level information, which corresponds to the magnitude of the electric field strength.

[0047] S203. The level information is input into the analog-to-digital converter and converted into a digital signal, which is then input into the microcontroller and stored. The microprocessor writes the digital signal obtained from the level information conversion into the RFID tag; the digital signal of the level information is converted into RGB value, and the RGB value is added to the RGB calibration value to obtain the calibrated RGB value. Then, the color-changing LED is controlled to produce different colors according to the calibrated RGB value.

[0048] Step S3 includes the following sub-steps:

[0049] S301. The central processing unit transmits the video images acquired by the video image acquisition module to the display for display, thereby realizing the visualization of the electromagnetic environment;

[0050] S302. The digital signals of the tag number and the level information in the tag collected and read by the RFID reader in each visual detection device are transmitted to the display to achieve accurate display of electromagnetic environment information.

[0051] In the embodiments of this application, during detection, the corresponding limit is found according to the operating frequency band, and then the relationship between the electric field strength E and the voltage Vr across the load connected to the antenna is calculated based on the antenna coefficient AF (which is related to the antenna and the direction of the incident wave).

[0052] Vr=E / AF;

[0053] Given the input impedance Rin of the load connected to the antenna, the input power Pin can be calculated as follows:

[0054] Pin = Vr² / Rin;

[0055] Pin(dBm)=10*log10(Pin / 1mW)

[0056] Since the system uses a logarithmic power detector, the relationship between the input power and the output level is O = A Pin + B (A and B are related to the power detector in the detection device, Pin is in dBm and O is in V). After determining the limiting electric field strength E, the system output level O can be calculated at this time.

[0057] The currently adopted STM32 has a 12-bit ADC, which can quantify the voltage level from 0V to the provided reference voltage Vref into 4096 parts. The provided reference voltage should be slightly greater than the voltage level corresponding to the limiting electric field strength.

[0058] Let the quantization level corresponding to the limiting electric field strength be Oq (0 < Oq ≤ 4095), and Oq = round[(O / Vref) * 4096 - 1]

[0059] Oq is determined to be red (RGB value 255, 0, 0), the quantization level at 3Oq / 4 is yellow (255, 255, 0), the quantization level at Oq / 2 is green (0, 255, 0), the quantization level at Oq / 4 is light blue (0, 255, 255), and the quantization level at 0 is dark blue (0, 0, 255)

[0060] Between these determined color level values, linearly insert the RGB values to obtain the corresponding RGB values for other level values, that is

[0061] When 3Oq / 4 < x < Oq, the R value = 255

[0062] The G value = 255 * (4 - 4x / Oq)

[0063] The B value = 0

[0064] When Oq / 2 < x < 3Oq / 4, the R value = 255 * (4x / Oq - 2)

[0065] The G value = 255

[0066] The B value = 0

[0067] When Oq / 4 < x < Oq / 2, the R value = 0

[0068] The G value = 255

[0069] The B value = 255 * (2 - 4x / Oq)

[0070] When 0 < x < Oq / 4, the R value = 0

[0071] The G value = 255 * (4x / Oq)

[0072] The B value = 255

[0073] In the embodiments of this application, a correspondence list between the digital signal of the level information and the RGB value can also be preset in advance, and then directly look up the table according to the digital signal of the level information to obtain the RGB value, completing the conversion from the level information to the RGB value.

[0074] Compared to existing electromagnetic radiation monitoring equipment such as spectrum analyzers, field strength meters, and microwave leakage detectors, the unit system (visual detection device) mainly improves the data display and export sections. It replaces the general LCD or OLED screen display with a color-changing LED display, which greatly reduces the size and power consumption and makes it more intuitive. The data export is achieved through wireless RFID technology, which avoids the spatial layout issues that need to be considered when using transmission lines and also consumes much less power than traditional wireless communication Bluetooth and Wi-Fi.

[0075] These improvements offer the advantages of miniaturization, low power consumption, and suitability for wide-area reading. Furthermore, because broadband and RFID antennas can be designed as planar structures, the system can be flexibly and flattened to adapt to mobile scenarios and the need for detection on complex curved surfaces. Combining this with RFID's suitability for reading large volumes of data, multiple sensing systems can be deployed in space for pixelated, visualized electromagnetic radiation detection, enabling simple, fast, and high spatial resolution panoramic real-time radiation detection.

[0076] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the methods described in the foregoing embodiments, such as changing the names of the methods. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A visualization system for monitoring the electromagnetic environment in space, characterized in that: It includes a visualization processing center and multiple visualization detection devices set in different areas of the monitoring space; The visualization detection device includes a broadband antenna, a power detector, an analog-to-digital converter, a microcontroller, a color-changing LED, and an RFID tag; The broadband antenna is used to receive the electromagnetic wave signal in the area where it is located and transmit it to the power detector. The power detector detects the electromagnetic wave signal output by the broadband antenna and outputs a level information reflecting the signal strength, and transmits the output level information to the microcontroller through the analog-to-digital converter. The microcontroller is used to convert the digital signal obtained from the level information into RGB values, and control the color-changing LED to produce different colors according to the RGB values. At the same time, write the digital signal obtained from the level information into the RFID tag; Let the quantization level information corresponding to the limiting electric field strength be Oq, 0 < Oq ≤ 4095, Oq = round[(O / Vref)*4096 - 1], where Vref is the reference voltage; At the level information Oq, it is red, and the RGB value is (255, 0, 0). At the level 3Oq / 4, it is yellow, and the RGB value is (255, 255, 0). At the level information Oq / 2, it is green, and the RGB value is (0, 255, 0). At the level information Oq / 4, it is light blue, and the RGB value is (0, 255, 255). At the level information 0, it is dark blue, and the RGB value is (0, 0, 255); Linearly insert the RGB values between the level values of the determined colors to obtain the corresponding RGB values of other level values, that is: When 3Oq / 4 < x < Oq, R value = 255; G value = 255*(4 - 4x / Oq); B value = 0; When Oq / 2 < x < 3Oq / 4, R value = 255*(4x / Oq - 2); G value = 255; B value = 0; When Oq / 4 < x < Oq / 2, R value = 0; G value = 255; B value = 255*(2 - 4x / Oq); When 0 < x < Oq / 4, R value = 0; G value = 255*(4x / Oq); B value = 255; The visualization processing center includes a central processor, a display, an RFID reader with a scanning range covering the entire monitoring space, and a video image acquisition module with a shooting range covering the entire monitoring space. The RFID reader and the video acquisition module are both connected to the central processor, and the central processor is also connected to the display. The central processor is used to transmit the video images collected by the video image acquisition module to the display for display to achieve the visualization display of the electromagnetic environment. At the same time, transmit the digital signals of the tag numbers and the level information in the tags collected and read by the RFID readers in each visualization detection device to the display for accurate display; Each of the aforementioned RFID tags has a unique number; the visualization processing center also includes a memory connected to the central processing unit, used to store the location of each numbered RFID tag in the monitoring space; after receiving the RFID tag number and the voltage level information in the tag read by the RFID reader, the central processing unit finds the location corresponding to the tag number, and transmits the found location together with the tag number and the voltage level information in the tag to the display for display; The visual detection device is arranged in a rectangular array in the monitoring space. The visual detection device has M rows and N columns, and a total of M*N devices. The position of the RFID tag in the monitoring space, that is, the position of the visual detection device in the detection and control, refers to the number of rows and columns of the visual detection device to which the RFID tag belongs in the rectangular array.

2. The visualization system for monitoring the electromagnetic environment in space according to claim 1, characterized in that: The video acquisition module includes a camera for capturing video images of the entire monitoring space.

3. A visualization method for monitoring the electromagnetic environment in space, based on the system described in any one of claims 1 to 2, characterized in that, Includes the following steps: S1. The visualization system is calibrated to obtain the RGB difference values ​​at each visualization detection device and transmit them to each visualization detection device; S2. After calibration, begin collecting and processing the electromagnetic environment in the monitoring space; S3. Information is collected using RFID readers and video image acquisition modules, and the electromagnetic environment is visualized.

4. The visualization method for monitoring the electromagnetic environment in space according to claim 3, characterized in that: In step S1, the method for calibrating the visualization system and obtaining the RGB difference values ​​at each visualization detection device includes any of the following: First, a standard radiation source is used to irradiate the detection space; In each visual detection device within the monitored space, a broadband antenna receives electromagnetic wave signals from its local area and transmits them to a power detector. The power detector detects the electromagnetic wave signals output by the broadband antenna and outputs a level information reflecting the signal strength. This level information is then transmitted to a microcontroller via an analog-to-digital converter. The microcontroller converts the digital signal obtained from the level information into RGB values ​​and controls the color-changing LEDs to produce different colors based on the RGB values. Simultaneously, the digital signal obtained from the level information is written into an RFID tag. In the visualization processing center, RFID readers scan the RFID tags in each visualization detection device to obtain the digital signal converted from the location of each visualization detection device in the monitoring space and the detected level information. This signal is then converted into RGB values ​​and transmitted to the central processing unit (CPU). The video image acquisition module acquires video images in the monitoring space and transmits them to the CPU. Based on the acquired video images, the CPU extracts the RGB values ​​of the location of each visualization detection device and the color displayed by the color-changing LED at that location. The CPU subtracts the RGB value of the color-changing LED extracted from the location of each visualization detection device from the RGB value of the converted RGB value at that location to obtain the RGB calibration value for each visualization detection device's location. The visualization processing center writes the RGB calibration value of each visualization detection device's location into the RFID tag of that device using an RFID reader; Second, the visualization processing center sets the digital signal of the level information at the location of each visualization detection device, and writes the set digital signal of the level information into the RFID tag of each visualization detection device through an RFID reader, and then converts the set digital signal of the level information into RGB values. In each visual detection device, the microprocessor reads the digital signal of the level information in the RFID tag, converts it into RGB values, and then controls the color-changing LED to produce different colors according to the RGB values; In the visualization processing center, the video image acquisition module acquires video images in the monitoring space and transmits them to the central processing unit; the central processing unit extracts the location of each visualization detection device and the RGB value of the color-changing LED display at that location based on the acquired video images in the monitoring space. Then, the RGB value obtained by converting the digital signal of the level information set at the location of each visual detection device into the RGB value of the color-changing LED displayed at the location of the visual detection device is subtracted to obtain the RGB calibration value at the location of each visual detection device. The visualization processing center writes the RGB calibration value of each visualization detection device's location into the RFID tag of that device using an RFID reader.

5. The visualization method for monitoring the electromagnetic environment in space according to claim 3, characterized in that: Step S2 includes the following sub-steps: S201. In each visual detection device, the microprocessor deletes the digital signal of the level information saved by the RFID tag during the calibration process, and only retains the RFID tag number, the position of the visual detection device in the monitoring space saved in the RFID tag, and the RGB calibration value. S202. The power detector detects the antenna output signal and generates a level information, which corresponds to the magnitude of the electric field strength. S203. The level information is input into the analog-to-digital converter and converted into a digital signal, which is then input into the microcontroller and stored. The microprocessor writes the digital signal obtained from the level information conversion into the RFID tag. The digital signal of the level information is converted into RGB value, and the RGB value is added to the RGB value to obtain the calibrated RGB value. Then, the color-changing LED is controlled to produce different colors according to the calibrated RGB value.

6. The visualization method for monitoring the electromagnetic environment in space according to claim 3, characterized in that: Step S3 includes the following sub-steps: S301. The central processing unit transmits the video images acquired by the video image acquisition module to the display for display, thereby realizing the visualization of the electromagnetic environment; S302. The digital signals of the tag number and the level information in the tag collected and read by the RFID reader in each visual detection device are transmitted to the display to achieve accurate display of electromagnetic environment information.

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