Method and system for dynamically adjusting radar transmit power, portable imaging system

Abstract

This invention discloses a method for dynamically adjusting radar transmit power, comprising the steps of: using a transmitting device to scan the environment under test through a transmit beam; using a receiving device to receive echo signals reflected by targets in the environment under test; using an analog-to-digital converter to convert the echo signals into digital signals to statistically analyze the distance and echo intensity of the targets; using a control module to set a transmit power threshold value based on the distance and echo intensity, and to calculate a transmit power configuration based on the transmit power threshold value; and generating a control signal based on the transmit power configuration; and using an attenuator to adjust the transmit power used by the transmitting device when scanning the targets based on the control signal. This invention also discloses a system for dynamically adjusting radar transmit power and a portable imaging system.

Description

Technical Field

[0001] This invention relates to an imaging system and imaging method, and more particularly to a method and system for dynamically adjusting radar transmit power in terahertz, Asia-Pacific hertz, millimeter wave and optical modes, as well as a portable imaging system. Background Technology

[0002] Terahertz imaging technology is a detection technique that uses electromagnetic waves with frequencies ranging from 0.1 THz to 10 THz for imaging. It combines electrical and optical characteristics. Terahertz imaging does not require direct contact and does not cause structural damage to the material under test, thus possessing unique advantages in materials inspection and imaging.

[0003] Terahertz waves have the ability to penetrate non-metallic materials, such as plastics, fibers, ceramics, and composite materials, and can be absorbed and reflected by different materials. Furthermore, through reflection imaging and semi-transparent imaging, terahertz imaging technology can detect the internal structure of materials to identify defects such as cracks and damage, and can also analyze material properties and structure.

[0004] In industries such as rail, aviation, and infrastructure (e.g., cracks in bridges and tunnels), the testing and analysis of materials and structures are particularly important. For example, fatigue cracks in aircraft materials can directly affect the structural integrity and strength of an aircraft. Therefore, each aircraft needs to be inspected every 750 flight hours on average. If cracks in an aircraft are not detected early, they could endanger flight safety.

[0005] Currently, the industry's demand for testing technology mainly focuses on high efficiency, high precision, and ease of operation. Requirements include that the testing system should be able to detect a variety of defects, such as delamination, delamination, dents, cracks, holes, water seepage, melting, and lightning strikes.

[0006] However, current terahertz imaging systems are large, and many of the objects to be inspected are also large components, making inspection difficult and cumbersome. Furthermore, terahertz technology may not be perfect in some detection situations; for example, terahertz technology is more suitable for detecting dents on thin structures, resulting in insufficient detection completeness.

[0007] As can be seen from the above, conventional imaging detection systems need improvement. Summary of the Invention

[0008] The main objective of this invention is to provide a portable imaging system to improve the speed, accuracy, and convenience of structural inspection.

[0009] To achieve the above objectives, in one embodiment of the present invention, a method for dynamically adjusting radar transmission power is provided, comprising the following steps: S10: Using a transmitting device to scan a test environment by emitting a beam; S20: Use a receiving device to receive the echo signal reflected by a target object in the environment under test; S30: Use an analog-to-digital converter to capture the echo signal and convert it into a digital signal in order to statistically analyze the distance to the target object and the echo intensity; S40: Use a control module to set a transmit power threshold value based on the distance and the echo intensity; S50: Use this control module to calculate a transmit power configuration based on the transmit power threshold value; S60: Use the control module to generate a control signal according to the transmit power configuration; and S70: Using an attenuator, the transmitting device adjusts the transmission power used when scanning the target object according to the control signal.

[0010] In one embodiment of the present invention, in step S10, a phase control module is used to adjust the beam angle of the transmitting device.

[0011] In one embodiment of the present invention, in step S20, there are multiple targets, and the receiving device is used to receive the echo signal reflected by each of the multiple targets; and in step S30, the distance and echo intensity of each of the multiple targets are statistically analyzed.

[0012] In one embodiment of the present invention, step S80 is further included: using a monitoring module to monitor and analyze the signal-to-noise ratio of the receiving device to obtain a signal-to-noise ratio result, and evaluating the effect of the transmission power based on the signal-to-noise ratio result.

[0013] In one embodiment of the present invention, when the signal-to-noise ratio result is lower than a target value, the control module is made to adjust the transmission power configuration, thereby adjusting the transmission power of the transmitting device.

[0014] In one embodiment of the present invention, when the transmitting device is continuously used to scan the environment under test and a plurality of signal-to-noise ratio results are continuously obtained, the decision on whether to adjust the current transmitting power configuration is based on the previously obtained signal-to-noise ratio result.

[0015] To achieve the above objectives, in another embodiment of the present invention, a system for dynamically adjusting radar transmit power for performing the method described above is provided, comprising: a transmitting device for scanning a target environment by transmitting a beam; a receiving device for receiving an echo signal reflected by a target object in the target environment; an analog-to-digital converter electrically connected to the receiving device for capturing the echo signal and converting it into a digital signal to statistically analyze the distance and echo intensity of the target object; a control module electrically connected to the analog-to-digital converter for setting a transmit power threshold value based on the distance and the echo intensity, calculating a transmit power configuration based on the transmit power threshold value, and generating a control signal based on the transmit power configuration; and an attenuator electrically connected to the control module for adjusting the transmit power used by the transmitting device when scanning the target object according to the control signal.

[0016] In one embodiment of the present invention, a phase control module is further included, electrically connected to the transmitting device, for adjusting the beam angle of the transmitting device.

[0017] In one embodiment of the present invention, a monitoring module is further included for monitoring and analyzing the signal-to-noise ratio of the receiving device to obtain a signal-to-noise ratio result, and evaluating the effect of the transmission power based on the signal-to-noise ratio result.

[0018] To achieve the above objectives, in another embodiment of the present invention, a portable imaging system is provided for performing the method of dynamically adjusting radar transmission power as described above. The system includes: a handheld detection component comprising a body and a probe assembly disposed on the body, and including a radar element and an image capturing element. The radar element is selected from the group consisting of terahertz radar elements, Asia-Pacific hertz radar elements, and millimeter-wave radar elements. The radar element includes: an oscillator, a frequency synthesizer, a phase control module, a power amplifier, an attenuator, a transmitting device, a receiving device, an analog-to-digital converter, and a digital front-end. The oscillator and the frequency synthesizer are used to generate a power output between 30 and 300 kHz. A carrier wave in the GHz band (millimeter wave, Asia-Pacific Hertz, terahertz band) is used. A phase control module receives the carrier wave and adjusts its phase. A power amplifier is electrically connected to the phase control module to amplify the phase-adjusted carrier wave. An attenuator is electrically connected to the power amplifier to adjust the transmission power used by the transmitting device when scanning the target object according to a control signal. The transmitting device is electrically connected to the attenuator to transmit the carrier wave to a test environment at the transmission power. A receiving device receives the echo signal reflected by a target object in the test environment. An analog-to-digital converter is electrically connected to the receiving device to receive the echo signal. The signal is converted into a digital signal, and the digital front end is electrically connected to the analog-to-digital converter for processing the digital signal; and a host is electrically connected to the handheld detection component and includes a control module for receiving and analyzing the processed digital signal from the digital front end to obtain an imaging result, wherein the analog-to-digital converter is also used to statistically analyze the distance and echo intensity of the target object based on the digital signal; and the control module is also used to set a transmission power threshold value based on the distance and the echo intensity, calculate a transmission power configuration based on the transmission power threshold value, and generate the control signal based on the transmission power configuration.

[0019] In one embodiment of the present invention, the host further includes a monitoring module for monitoring and analyzing the signal-to-noise ratio of the receiving device to obtain a signal-to-noise ratio result, and evaluating the effect of the transmission power based on the signal-to-noise ratio result.

[0020] In one embodiment of the present invention, the host further includes a hardware / software switching module for switching between a hardware beam switching mode, a software beam switching mode, and a hybrid mode to adjust the carrier. In the hardware beam switching mode, the hardware / software switching module activates the transmitting device to switch the carrier to a desired beam direction. In the software beam switching mode, the control module calculates the phase offset of the transmitting device, and the phase control module adjusts the phase of the carrier according to the phase offset to make the carrier beam face the desired beam direction. In the hybrid mode, the transmitting device is first activated to switch the carrier to the desired beam direction, and then the control module calculates the phase offset of the transmitting device, and the phase control module adjusts the phase of the carrier according to the phase offset.

[0021] The beneficial effects of this invention are as follows: In the method for dynamically adjusting radar transmit power, an attenuator is added to the transmitting end (e.g., radar antenna) and the front end of the power amplifier to provide the function of dynamically modulating the transmit power, thereby improving the signal-to-noise ratio according to environmental requirements. Furthermore, the effect of power adjustment is evaluated and verified by the signal-to-noise ratio at the receiving end. If the signal-to-noise ratio does not reach the ideal value, the power configuration is further optimized based on the latest data, continuously improving the adaptability and accuracy of the transmit power, forming a dynamically optimized closed-loop control process. This cycle repeats continuously, ensuring that the system can maintain optimal performance in dynamic environments. In addition, the portable imaging system of this invention, through its portable structure, makes its application more flexible in terms of time and location. Furthermore, by using terahertz / Asia-Pacific hertz / millimeter-wave radar as the core sensor, supplemented by cameras and structured light sensors, the image detection provided by the camera can simultaneously detect the position and category of multiple objects in an image or video, while structured light has high accuracy in depth sensing. Therefore, the completeness, efficiency and accuracy of planar damage analysis, penetrating internal damage detection and advanced material structure analysis are improved, which can be widely used in aircraft maintenance, rail maintenance and building structure inspection and other fields. Attached Figure Description

[0022] Figure 1 A three-dimensional schematic diagram of a portable imaging system according to one embodiment of the present invention; Figure 2 This is a block diagram of a portable imaging system according to an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating the operation flow of a portable imaging system according to an embodiment of the present invention. Figure 4 A flowchart illustrating a method for dynamically adjusting radar transmit power according to one embodiment of the present invention; and Figure 5 This is a flowchart of a method for dynamically adjusting radar transmit power according to another embodiment of the present invention.

[0023] Figure label: 100: Portable imaging system; 1: Handheld detection component; 11: Ontology; 113: Camera; 114: Structured light; 115: Radar; 1151: Oscillator; 1152: Frequency synthesizer; 1153: Phase control module; 1154: Power amplifier; 1155: Launching device; 1156: Receiving device; 1157: Low-noise amplifier; 1158: Intermediate frequency processing module; 1159: Analog to Digital Converter; 1160: Digital front end; 116: First control interface; 117: Attenuator; 12: Probe assembly; 121: Receiver antenna array; 122: Transmitting antenna array; 2: Host computer; 21: Bus; 22: Motherboard; 221: Control module; 2211: Single-chip system; 2212: Random Access Memory; 2213: Hard drive; 2214: Graphics Processor; 222: Display module; 223: Second control interface; 224: Monitoring module; 225: Hardware / Software Switching Module; 23: Charging port; A: Transformer; B: Battery; P1: Power supply module; P2: External power supply; S10 to S80: Steps of the method for dynamically adjusting radar transmission power according to the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Furthermore, to better illustrate the present invention, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that the present invention can be practiced without certain specific details.

[0025] Unless otherwise stated herein, the singular forms “a” and “the” used in the specification and the appended claims include the numerals. Unless otherwise stated herein, the term “or” used in the specification and the appended claims includes the meaning of “and / or”.

[0026] Reference Figure 1 According to one embodiment of the present invention, a portable imaging system 100 includes: a handheld detection component 1 and a host 2.

[0027] Reference Figures 1 to 3 The handheld detection component 1 includes a body 11 and a probe assembly 12. The probe assembly 12 is disposed on the body 11 and includes an image capturing element, such as a camera 113 (e.g., a complementary metal-oxide-semiconductor, CMOS sensor) and a radar element, namely, radar 115, wherein the radar element is selected from the group consisting of terahertz radar elements, Asia-Pacific hertz radar elements, and millimeter-wave radar elements. The radar 115 includes: an oscillator 1151, a frequency synthesizer 1152, a phase control module 1153, a power amplifier 1154, a transmitter 1155, a receiver 1156, a low-noise amplifier 1157, an intermediate frequency processing module 1158, an analog-to-digital converter 1159, a digital front-end 1160, and an attenuator 117.

[0028] Reference Figure 3The oscillator 1151 and the frequency synthesizer 1152 are used to generate carrier waves ranging from 30 to 300 GHz (e.g., 30, 40, 50, 60, 70, 80, 90, 100, 200, 300 GHz). The phase control module 1153 is used to receive the carrier wave and adjust its phase. Specifically, the phase control module 1153 adjusts the phase of the transmitted and received signals through phase shifting and beam control techniques to achieve beamforming and scanning functions, enabling the radar to detect in a specific direction. The power amplifier 1154 is electrically connected to the phase control module 1153 and is used to amplify the phase-adjusted carrier wave. The attenuator 117 is electrically connected to the power amplifier 1154 and is used to adjust the transmission power used by the transmitting device when scanning the target object according to a control signal. The transmitting device 1155 is electrically connected to the attenuator 117 and is used to transmit the carrier wave to a test environment at the transmission power. In this embodiment, the transmitting device 1155 is a transmitting antenna, and a transmitting device array 122 is formed at one end of the main body 11. The receiving device 1156 is a receiving antenna for receiving an echo signal (reflected signal) reflected by the target object, and a receiving device array 121 is formed at that end of the main body 11. The portable imaging system of the present invention improves gain and reduces half-power beamwidth by using an array antenna, thereby providing more accurate data during C-Scan scanning. The low-noise amplifier 1157 is electrically connected to the receiving device 1156 for receiving and amplifying the echo signal. The intermediate frequency processing module 1158 is electrically connected to the low-noise amplifier 1157 for converting the amplified echo signal into a more easily processed intermediate frequency signal. The analog-to-digital converter (ADC) 1159 is electrically connected to the intermediate frequency processing module 1158 to convert the intermediate frequency signal into a digital signal, and is also used to statistically analyze the distance and echo intensity of the target object based on the digital signal. Optionally, the ADC 1159 can be an SS ADC. The digital front end 1160 is electrically connected to the ADC 1159 to process the digital signal, and finally outputs it to the host 2 through a data interface for further analysis.

[0029] Reference Figure 2The probe assembly 12 may also include a structured light element, namely, a structured light 114, electrically connected to the radar 115 and the camera 113. Preferably, the structured light element may include an infrared emitter, an infrared camera module, and so on. The principle is mainly to emit a light spot with a specific pattern onto the object, and then receive the light pattern encoding on the object surface via the camera, thereby comparing the similarities and differences with the original projected light spot, and calculating the three-dimensional coordinates of the object using the triangulation principle, which is suitable for sensing short-range measurements.

[0030] The probe assembly 12 may further include a first control interface 116, electrically connected to the radar 115, the camera 113, and the structured light 114, for controlling the coupling of the radar 115, the camera 113, and the structured light 114. In this embodiment, the first control interface 116 may be an SPI (Serial Peripheral Interface Bus) or an I2C interface.

[0031] Reference Figure 1 and Figure 2 The host 2 can be electrically connected to the handheld detection component 1 via, for example, its bus 21, and also includes a motherboard 22 and a charging port 23. The motherboard 22 is disposed inside the host 2, and the charging port 23 is formed on the lower side of the host 2. The motherboard 22 includes: a control module 221, a display module 222, a second control interface 223, an (internal) power module P1, a monitoring module 224, and a hardware / software switching module 225.

[0032] Reference Figure 2The control module 221 is used to receive and analyze the processed digital signal from the digital front end 1160 to obtain an imaging result. Furthermore, the control module 221 is also used to set a transmit power threshold value based on the distance and the echo intensity, calculate a transmit power configuration based on the transmit power threshold value, and generate the control signal based on the transmit power configuration. Specifically, the control module 221 may include: a system on a chip (SoC) 2211 for processing digital signals, analog signals, and mixed signals, etc.; random-access memory (RAM) 2212 for storing data (e.g., digital signals from the handheld detection device 1) and having short-term fast access capabilities; a hard disk 2213 for storing data; and a graphics processing unit (GPU) 2214 to improve the performance of various types of workloads, such as image processing, analysis, and accelerated computing. The components within the control module 221 together form the core computing unit and are connected to external devices through the second control interface 223. For example, after a target is detected by radar, its data is transmitted to the control module 221 through the first control interface 116 for SAR imaging calculation, and the imaging result is imaged on a touch-sensitive display (not shown) disposed on one side of the host 2 via the display module 222 electrically connected to the control module 221.

[0033] Reference Figure 2 The power module P1 is electrically connected to the control module 221 and includes a charging module (not shown), a battery B, and a voltage regulator module (not shown) for providing power to the handheld detection component 1 and the host 2. Specifically, the voltage regulator module provides a constant and stable voltage to the battery B, which can be a rechargeable battery. An external power source P2 provides power through a transformer A (e.g., an AC transformer) and charges the battery B, enabling the portable imaging system 100 to have both direct external power supply and internal power supply (the battery B). The internal power supply ensures the stable operation of the portable imaging system 100 under portability requirements.

[0034] The second control interface 223 is electrically connected to the control module 221 and is used to control the coupling of multiple components within the control module 221. In this embodiment, the second control interface 223 may be an SPI (Serial Peripheral Interface Bus) or an I2C interface.

[0035] The monitoring module 224 monitors and analyzes the signal-to-noise ratio (SNR) of the receiving device to obtain an SNR result, and evaluates the effectiveness of the transmit power based on the SNR result. When the SNR result is lower than a target value, the control module adjusts the transmit power configuration, thereby adjusting the transmit power of the transmitting device. While continuously scanning the environment under test using the transmitting device and continuously obtaining multiple SNR results, the decision to adjust the current transmit power configuration is based on the previously obtained SNR result.

[0036] The hardware / software switching module 225 is used to switch between a hardware beam switching mode, a software beam switching mode, and a hybrid mode to adjust the beam direction of the carrier. The hardware beam switching mode is suitable for fixed or predetermined directions, the software beam switching mode is suitable for dynamic or high-precision requirements, and the hybrid mode is suitable for complex environments, such as multiple targets or large-area coverage requirements. Preferably, the hardware / software switching module 225 selects the appropriate switching mode according to the requirements and notifies the system user when necessary. In the hardware beam switching mode, the hardware / software switching module 225 activates the transmitting device (e.g., antenna layer) to quickly switch the carrier to the desired beam direction. Specifically, in this mode, the hardware / software switching module 225 first determines the direction to be switched to, then activates the corresponding antenna combination or changes the layer configuration to quickly switch the beam direction. In the software beam switching mode, the control module 221 calculates the phase offset of the transmitting device 1155, such as the phase offset of each antenna element, and the phase control module 1153 adjusts the phase of the carrier according to the phase offset to make the carrier beam oriented towards the desired beam direction. Preferably, in this mode, the phase offset can be continuously updated in response to continuously changing directions, and the beam can be dynamically adjusted in real time. In the hybrid mode, the transmitting device is first activated to roughly switch the carrier to the desired beam direction, and then the control module 221 calculates the phase offset of the transmitting device 1155, and the phase control module 1153 adjusts the phase of the carrier according to the phase offset to achieve precise beam alignment and direction control. Preferably, when beam requirements change frequently or multiple directions need to be covered, the hardware / software switching module 225 automatically switches between the hardware beam switching mode and the software beam switching mode. Preferably, the hardware / software switching module 225 is used to continuously monitor the operating status of the transmitting device, such as the antenna, to check phase deviation and beam pointing, and to perform automatic correction. Furthermore, the hardware / software switching module 225 dynamically adjusts the ratio of hardware beam switching mode to software beam switching mode based on the current beam stability, in order to balance switching speed and accuracy.

[0037] Reference Figure 4A method for dynamically adjusting radar transmit power using a portable imaging system 100 as described above, according to one embodiment of the present invention, includes the following steps: S10: A transmitting device is used to scan a test environment by emitting a beam. Optionally, in step S10, the beam angle of the transmitting device is adjusted using a phase control module according to the following formula to perform an all-around scan of the surrounding environment:

[0038] in θ n Let θ be the nth scanning angle, θ0 be the initial angle, and Δθ be the scanning interval.

[0039] S20: A receiving device is used to receive the echo signal reflected by a target object in the environment under test. Optionally, in step S20, there are multiple targets, and the receiving device is used to receive the echo signal reflected by each of the multiple targets.

[0040] S30: The echo signal is captured using an analog-to-digital converter and converted into a digital signal to statistically analyze the distance and echo intensity of the target object. Optionally, in step S30, the distance and echo intensity of each of the plurality of target objects are statistically analyzed. Specifically, the received signal data is digitized using an analog-to-digital converter to extract data corresponding to each Range Bin, which includes the distance and echo intensity of the target object. Furthermore, the scanned data is analyzed, and the distance and echo intensity of each target object are determined by analyzing the reflection characteristics of each target object. The target distance can be the wave crest position, where the target distance is calculated using the echo time, as follows:

[0041] in t represents the echo time. c is the speed of light.

[0042] S40: A control module is used to set a transmit power threshold value based on the distance and the echo intensity. Specifically, power thresholds are set for different ranges based on the target distance and signal strength, as shown in the following formula: when the target distance is far and the signal strength is low, attenuation is reduced to increase transmit power. When the target distance is close and the signal strength is high, attenuation is increased to reduce transmit power, avoiding excessive energy consumption or interference.

[0043]

[0044] in P max At maximum transmission power, Pmin For minimum transmission power, P opt For optimal transmission power, S RB The strength of the reflected signal.

[0045] S50: Use the control module to calculate a transmit power configuration based on the transmit power threshold value. Optionally, the power configuration is determined based on A-Scan data.

[0046] The required transmission power is calculated using the following formula:

[0047] in, Environmental degradation coefficient, max This is the maximum transmission power.

[0048] The attenuator parameters are determined based on the calculation results when setting the variable attenuation value:

[0049] in, dB This is the attenuation value, ensuring the transmission power meets the optimal setting.

[0050] S60: The control module generates a control signal based on the transmit power configuration. Specifically, the control module calculates the appropriate control voltage. Ctrl, as shown below:

[0051] in, 1 and 2 represents the system correction coefficient.

[0052] S70: An attenuator is used to adjust the transmission power employed by the transmitting device when scanning the target object according to the control signal, as follows:

[0053] in, in represents the input power. out represents the power after adjustment by the attenuator.

[0054] Reference Figure 5According to another embodiment of the present invention, a method for dynamically adjusting radar transmit power using the portable imaging system described above includes, in addition to the aforementioned steps S10 to S70, step S80: using a monitoring module to monitor and analyze the signal-to-noise ratio (SNR) of the receiving device to obtain an SNR result, and evaluating the effectiveness of the transmit power based on the SNR result. When the SNR result is lower than a target value, the control module adjusts the transmit power configuration, thereby adjusting the transmit power of the transmitting device. Selectively, while continuously scanning the environment under test using the transmitting device and continuously obtaining a plurality of SNR results, the decision to adjust the current transmit power configuration is based on the previously obtained SNR result.

[0055] Although the present invention has been disclosed with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art may make various modifications and alterations without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for dynamically adjusting radar transmit power, characterized in that, Includes the following steps: S10: Using a transmitting device to scan a test environment by emitting a beam; S20: Use a receiving device to receive the echo signal reflected by a target object in the environment under test; S30: Use an analog-to-digital converter to capture the echo signal and convert it into a digital signal in order to statistically analyze the distance to the target object and the echo intensity; S40: Use a control module to set a transmit power threshold value based on the distance and the echo intensity; S50: Use the control module to calculate a transmit power configuration based on the transmit power threshold value; S60: Use the control module to generate a control signal according to the transmit power configuration; as well as S70: Using an attenuator, the transmitting device adjusts the transmission power used when scanning the target object according to the control signal.

2. The method as described in claim 1, characterized in that, In step S10, a phase control module is used to adjust the beam angle of the transmitting device.

3. The method as described in claim 1, characterized in that, In step S20, there are multiple targets, and the receiving device is used to receive the echo signal reflected by each of the multiple targets; and in step S30, the distance and echo intensity of each of the multiple targets are statistically analyzed.

4. The method as described in claim 1, characterized in that, It also includes step S80: using a monitoring module to monitor and analyze the signal-to-noise ratio of the receiving device to obtain a signal-to-noise ratio result, and evaluating the effect of the transmission power based on the signal-to-noise ratio result.

5. The method as described in claim 4, characterized in that, When the signal-to-noise ratio result is lower than a target value, the control module adjusts the transmission power configuration, thereby adjusting the transmission power of the transmitting device.

6. The method as described in claim 4, characterized in that, While continuously scanning the environment under test using the transmitting device and continuously obtaining multiple signal-to-noise ratio results, the decision on whether to adjust the current transmitting power configuration is based on the previously obtained signal-to-noise ratio result.

7. A system for dynamically adjusting radar transmit power for performing the method of dynamically adjusting radar transmit power as described in claim 1, characterized in that, Include: A transmitting device for scanning a test environment by emitting a beam; A receiving device for receiving an echo signal reflected by a target object in the environment under test; An analog-to-digital converter, electrically connected to the receiving device, is used to capture an echo signal and convert it into a digital signal in order to statistically analyze the distance to the target object and the echo intensity. A control module, electrically connected to the analog-to-digital converter, is used to set a transmit power threshold value based on the distance and the echo intensity, calculate a transmit power configuration based on the transmit power threshold value, and generate a control signal based on the transmit power configuration. as well as An attenuator, electrically connected to the control module, is used to adjust the transmission power used by the transmitting device when scanning the target object according to the control signal.

8. The system as described in claim 7, characterized in that, It also includes a phase control module electrically connected to the transmitting device for adjusting the beam angle of the transmitting device.

9. The system as described in claim 7, characterized in that, It also includes a monitoring module for monitoring and analyzing the signal-to-noise ratio of the receiving device to obtain a signal-to-noise ratio result, and evaluating the effect of the transmission power based on the signal-to-noise ratio result.

10. A portable imaging system for performing the method of dynamically adjusting radar transmit power as described in claim 1, characterized in that, Include: A handheld detection component includes a main body and a probe assembly. The probe assembly is disposed on the main body and includes a radar element and an image capturing element. The radar element is selected from the group consisting of terahertz radar elements, Asia-Pacific hertz radar elements, and millimeter-wave radar elements. The radar element includes: an oscillator, a frequency synthesizer, a phase control module, a power amplifier, an attenuator, a transmitting device, a receiving device, an analog-to-digital converter, and a digital front end. The oscillator and the frequency synthesizer are used to generate 30 to 300... A GHz carrier wave is used; a phase control module receives the carrier wave to adjust its phase; a power amplifier is electrically connected to the phase control module to amplify the phase-adjusted carrier wave; an attenuator is electrically connected to the power amplifier to adjust the transmission power used by the transmitting device when scanning the target object according to a control signal; the transmitting device is electrically connected to the attenuator to transmit the carrier wave to a test environment at the transmission power; a receiving device receives the echo signal reflected by a target object in the test environment; an analog-to-digital converter is electrically connected to the receiving device to convert the echo signal into a digital signal; and a digital front-end is electrically connected to the analog-to-digital converter to process the digital signal. as well as A host computer, electrically connected to the handheld detection component, includes a control module for receiving and analyzing the processed digital signal from the digital front end to obtain an imaging result. The analog-to-digital converter is also used to statistically analyze the distance and echo intensity of the target object based on the digital signal; and the control module is also used to set a transmission power threshold value based on the distance and the echo intensity, calculate a transmission power configuration based on the transmission power threshold value, and generate the control signal based on the transmission power configuration.

11. The portable imaging system as described in claim 10, characterized in that, The host also includes a monitoring module for monitoring and analyzing the signal-to-noise ratio of the receiving device to obtain a signal-to-noise ratio result, and evaluating the effect of the transmission power based on the signal-to-noise ratio result.

12. The portable imaging system as described in claim 10, characterized in that, The host also includes a hardware / software switching module for switching between a hardware beam switching mode, a software beam switching mode, and a hybrid mode to adjust the carrier. In the hardware beam switching mode, the hardware / software switching module activates the transmitting device to switch the carrier to the desired beam direction. In the software beam switching mode, the control module calculates the phase offset of the transmitting device, and the phase control module adjusts the phase of the carrier according to the phase offset to make the carrier beam face the desired beam direction. In the hybrid mode, the transmitting device is first activated to switch the carrier to the desired beam direction, and then the control module calculates the phase offset of the transmitting device, and the phase control module adjusts the phase of the carrier according to the phase offset.

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