Multi-frequency-point low-power-consumption ultra-wideband radio frequency array near-field non-contact detection method and system

Abstract

The invention provides a multi-frequency-point low-power-consumption ultra-wideband radio frequency array near-field non-contact detection method and system, and relates to the technical field of ultra-wideband near-field detection, and the system comprises an MIMO array system which comprises an ultra-wideband signal transmitting module, an ultra-wideband signal receiving module, a transmit-receive conversion control module and an MIMO array. A plurality of symmetrical transmitting and receiving units of the MIMO array share the same MIMO physical array, wherein each array unit adopts a microstrip patch antenna; information transmission is carried out through a signal interface, and the MIMO array unit sequentially transmits ultra-wideband radio frequency signals to a near-field area, synchronously and sequentially receives echo signals of a measured object and carries out multi-frequency-point sampling; the ultra-wideband radio frequency detection signal is composed of a plurality of detection pulses, and the echo signal of each detection pulse is sampled at a plurality of frequency points. According to the multi-frequency-point low-power-consumption ultra-wideband radio frequency MIMO array near-field non-contact detection method disclosed by the invention, the detection data acquisition speed is improved.

Description

Technical Field

[0001] This disclosure relates to the field of near-field detection and recognition imaging technology of ultra-wideband radio frequency signal MIMO arrays, specifically to a method and system for non-contact near-field detection of multi-frequency low-power ultra-wideband radio frequency arrays. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] Ultra-wideband (UWB) technology originated from pulse radio (IR) research and was initially applied in military radar and communications. In recent years, UWB technology has gradually expanded into the detection field, utilizing its high resolution and strong penetration capabilities to achieve non-destructive testing.

[0004] Traditional near-field imaging technologies (such as X-rays and CT scans) pose a hazard of ionizing radiation to the human body. High-intensity and frequent use may lead to cancer risks. Furthermore, these technologies are characterized by large equipment size, high manufacturing and maintenance costs, technological monopoly barriers, and limited adaptability to various scenarios, making it difficult to meet the application needs of dynamic, high-precision, and harsh and complex environments.

[0005] Currently, UWB technology addresses these issues through its nanosecond-level narrow pulse and ultra-wide spectrum characteristics, enabling non-destructive testing. Its low power (-41.3dBm) and radio frequency signals (3.1–30.6GHz) can penetrate non-metallic media (such as walls and foam) to acquire three-dimensional information of specific targets, achieving non-contact detection, identification, and imaging of the object under test. Furthermore, its extremely narrow temporal pulse width (picosecond level) and centimeter-level spatial resolution make it suitable for identifying tiny targets (such as imaging a 10mm metal sheet). Combined with compact transceiver probes and confocal imaging algorithms, it supports multi-angle signal acquisition and dynamic calibration.

[0006] However, in complex, multi-reflection environments (such as metal-dense factories), UWB signals may cause ranging errors due to multipath effects (signals are superimposed after being reflected by different paths), requiring additional algorithms for correction, which increases computational complexity and makes the detection results less accurate. Summary of the Invention

[0007] To address the aforementioned issues, this disclosure proposes a multi-frequency, low-power, ultra-wideband radio frequency array near-field contactless detection method and system. The system employs a Ka-band 20.8GHz-28GHz ultra-wideband signal combined with a MIMO array for near-field detection, enabling rapid detection scanning, high-speed sampling and transmission of echo signals; and control and signal synchronization of the MIMO array.

[0008] According to some embodiments, the present disclosure adopts the following technical solutions: This disclosure presents a multi-frequency, low-power, ultra-wideband radio frequency (MIMO) array near-field detection system, comprising an ultra-wideband radio frequency (RF) signal transmission module, an ultra-wideband echo signal reception module, a transceiver control module, and a clock synchronization module. The MIMO array includes multiple identical array elements, each employing a microstrip patch antenna. The RF signal transmission and reception modules include signal interfaces and synchronization control interfaces. The MIMO array elements transmit ultra-wideband RF signals for near-field detection and acquire echo signals from the target. The ultra-wideband RF detection signal contains multiple ultra-wideband RF detection pulses. Multiple frequency points are sampled for each pulse in the echo signal, effectively improving the scanning speed of the MIMO array's ultra-wideband RF near-field detection, simplifying cumbersome calibration procedures, and effectively reducing interference from mechanical errors.

[0009] Furthermore, the ultra-wideband radio frequency signal transmission module includes an ultra-wideband radio frequency signal generation, frequency multiplication, power amplification, and power distribution unit, and the ultra-wideband radio frequency receiving module includes an LNA high-gain receiver, a mixer, a dynamic filter, and a gain control unit. Furthermore, the transceiver control module includes a clock synchronization signal, dynamic control of the transmit / receive conversion, and a micro-error adjustment unit; Furthermore, the Ka-band has 96 pairs of symmetrical transmit and receive MIMO array elements, with each pair of transmit or receive MIMO elements having an effective detection and data acquisition period of 10 milliseconds, and the lateral detection period of the MIMO array being 960 milliseconds. Furthermore, each pair of transmit-receive MIMO units contains 383 effective ultra-wideband radio frequency probe pulses in each detection process, with 300 radio frequency points sampled per pulse. Each MIMO array detection cycle collects 383×300×96 sets of data, taking 10 milliseconds; the lateral detection cycle of the MIMO array is 960 milliseconds. Furthermore, the MIMO antenna array has a scanning speed of 4 millimeters per second, and takes 125 seconds to complete a 1000 mm × 500 mm detection area; According to some embodiments, the present disclosure adopts the following technical solutions: A near-field non-contact detection method using a multi-frequency, low-power, ultra-wideband radio frequency array includes: The transmitting MIMO antenna array sequentially transmits ultra-wideband radio frequency pulse signals in the range of 20.8 GHz to 28 GHz, and the MIMO array receives the echo signals from the target under test. Each MIMO unit transmits 383 effective detection pulses at a time, and samples 300 frequency points for each detection pulse, completing a total of 383 sets of data acquisition. The MIMO array acquires 383 × 300 × 96 sets of data during the detection period, which are then amplified by an LNA and down-converted to the baseband. The data from the detected signals are processed, and imaging algorithms are used to create images.

[0010] According to some embodiments, the present disclosure adopts the following technical solutions: A computer program product includes a computer program that, when executed by a processor, implements the detection method of the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system.

[0011] According to some embodiments, the present disclosure adopts the following technical solutions: A non-transitory computer-readable storage medium is provided for storing computer instructions, which, when executed by a processor, implement the detection method of the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system.

[0012] According to some embodiments, the present disclosure adopts the following technical solutions: An electronic device includes a processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to perform a detection method for implementing the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system.

[0013] Compared with the prior art, the beneficial effects of this disclosure are as follows: This disclosed multi-frequency low-power ultra-wideband radio frequency array near-field detection system comprises an ultra-wideband radio frequency signal transmission module and a receiving module forming a MIMO array unit. The MIMO array includes multiple identical transceiver array units, signal interfaces, and synchronization control interfaces. The MIMO array unit transmits ultra-wideband radio frequency signals for near-field detection and acquires the echo signal of the target under test. The ultra-wideband radio frequency detection signal contains multiple ultra-wideband radio frequency detection pulses. Multiple frequency points are sampled for each pulse in the echo signal, effectively improving the scanning speed of the MIMO array's ultra-wideband radio frequency near-field detection, simplifying cumbersome calibration procedures, and effectively reducing interference from mechanical errors.

[0014] This disclosed multi-frequency low-power ultra-wideband radio frequency array near-field detection system includes a MIMO array comprising 96 pairs of symmetrical transmit and receive MIMO array elements in the Ka-band. The effective detection and sampling period for each pair of transmit and receive elements is 10 milliseconds; the lateral detection and sampling period of the MIMO array is 960 milliseconds; each pair of transmit and receive MIMO elements contains 383 effective ultra-wideband radio frequency detection pulses per detection process, with 300 radio frequency points sampled per pulse. Each MIMO array detection cycle acquires 383×300×96 sets of data, taking 10 milliseconds. The multi-frequency low-power ultra-wideband radio frequency MIMO array near-field detection system effectively improves the detection and scanning data acquisition speed and greatly shortens the sampling time. Attached Figure Description

[0015] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0016] Figure 1 This is the detection pulse data format of the embodiments of this disclosure; Detailed Implementation The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0017] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Example 1 One embodiment of this disclosure provides a multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system; the multi-frequency low-power ultra-wideband radio frequency MIMO array near-field non-contact detection system includes a MIMO array system, which includes an ultra-wideband signal transmission module, an ultra-wideband signal reception module, a transceiver conversion control module, and a MIMO antenna array. The MIMO antenna array has multiple transmitting unit arrays and multiple receiving unit arrays sharing the same MIMO physical array, wherein each array unit adopts a microstrip patch antenna; information is transmitted through a signal interface, and the MIMO antenna units sequentially transmit ultra-wideband radio frequency signals to the near-field detection area, and synchronously and sequentially collect the echo signals reflected by the object under test; the ultra-wideband radio frequency signal consists of multiple detection pulses, and the echo signal of each detection pulse is sampled at multiple frequencies.

[0020] Furthermore, the ultra-wideband radio frequency signal transmission module includes radio frequency signal generation, frequency multiplication, power amplification, and power distribution units. The MIMO array is a 20.8GHz-28GHz ultra-wideband Ka-band (7.2GHz bandwidth). The detection system comprises 383 probe pulses, with each pulse sampling 300 frequency points.

[0021] The ultra-wideband signal transmission module and ultra-wideband signal reception module are composed of 96 pairs of symmetrical MIMO array units for Ka-band transmission and reception. The effective ultra-wideband radio frequency signal transmission, echo signal reception, and signal sampling period of each pair of MIMO array units is 10 milliseconds, and the lateral detection period of the MIMO array is 960 milliseconds.

[0022] Each transmitted ultra-wideband radio frequency signal contains 383 effective probe pulses, with each pulse sampled at 300 frequency points. The MIMO antenna array detection period includes 383×300×96 sampled data, taking 10 milliseconds.

[0023] The MIMO antenna array has a scanning speed of 4 millimeters per second and takes 125 seconds to complete a 1000 mm × 500 mm detection area.

[0024] Furthermore, the ultra-wideband signal transmitting module includes a radio frequency signal generation, frequency multiplication, power amplification, and power distribution unit, while the ultra-wideband receiving module includes an LNA high-gain receiver, a mixer, a dynamic filter, and a gain control unit.

[0025] Furthermore, the transceiver control module includes a clock synchronization signal, dynamic control of the transmit / receive conversion, and a micro-error adjustment unit.

[0026] Example 2 One embodiment of this disclosure provides a near-field non-contact detection method using a multi-frequency low-power ultra-wideband radio frequency array, comprising: The MIMO array sequentially transmits ultra-wideband radio frequency signals in the range of 20.8 GHz to 28 GHz and receives the echo signals from the target under test. The ultra-wideband radio frequency signals contain 383 effective detection pulse signals. 300 frequency points of each pulse signal are sampled. The number of samples per MIMO array detection cycle is 383×300×96 groups, which are amplified by an LNA and then down-converted to the baseband. The data from the detected signals are processed, and imaging algorithms are used to create images.

[0027] As one embodiment, the above-mentioned multi-frequency low-power ultra-wideband near-field contactless detection method is implemented based on the following multi-frequency low-power ultra-wideband near-field contactless detection system, which includes: The MIMO array system includes an ultra-wideband signal transmission module, an ultra-wideband signal reception module, a transceiver conversion control module, and a MIMO array. Multiple symmetrical transmit and receive array elements share the same MIMO physical array, with each element employing a microstrip patch antenna. Information is transmitted through a signal interface. The MIMO antenna elements sequentially transmit ultra-wideband radio frequency signals to the near-field region, simultaneously and sequentially acquiring the reflected echo signals from the object under test. The ultra-wideband radio frequency signal consists of multiple ultra-narrow probe pulses, and the echo signal of each probe pulse is sampled at multiple frequency points.

[0028] Furthermore, the ultra-wideband signal transmission module includes RF signal generation, frequency doubling, power amplification, and power distribution units. The MIMO antenna array is a 20.8GHz-28GHz ultra-wideband Ka-band (7.2GHz bandwidth). Detection and data acquisition consist of 383 probe pulses, with 300 frequency points sampled per pulse.

[0029] The ultra-wideband signal transmission module and the ultra-wideband radio frequency signal MIMO array are 96 pairs of symmetrical transmission and reception array units in the Ka band. The effective detection, echo signal reception and acquisition period of each array unit is 10 milliseconds; the lateral detection period of each MIMO array is 960 milliseconds.

[0030] Each of these units transmits an ultra-wideband radio frequency signal containing 383 effective probe pulses each time. For each pulse of the corresponding echo signal, 300 frequency points are sampled. The MIMO array detection period includes 383×300×96 sampled data and takes 10 milliseconds.

[0031] The MIMO antenna array has a scanning speed of 4 millimeters per second and takes 125 seconds to complete a 1000 mm × 500 mm detection area.

[0032] Furthermore, the ultra-wideband signal transmitting module includes a radio frequency signal generation, frequency multiplication, power amplification, and power distribution unit, while the ultra-wideband receiving module includes an LNA high-gain receiver, a mixer, a dynamic filter, and a gain control unit.

[0033] Furthermore, the transceiver control module includes a clock synchronization signal, dynamic control of the transmit / receive conversion, and a micro-error adjustment unit.

[0034] As one example, existing imaging algorithms are used for imaging.

[0035] Example 3 One embodiment of this disclosure provides a computer program product, including a computer program that, when executed by a processor, implements the detection method of the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system.

[0036] Example 4 One embodiment of this disclosure provides a non-transitory computer-readable storage medium for storing computer instructions. When the computer instructions are executed by a processor, they implement the detection method of the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system.

[0037] Example 5 One embodiment of this disclosure provides an electronic device, including: a processor, a memory, and a computer program; wherein the processor is connected to the memory, and the computer program is stored in the memory. When the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to perform a detection method for implementing the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system.

[0038] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0039] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0040] While the specific embodiments of this disclosure have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this disclosure. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this disclosure are still within the scope of protection of this disclosure.

Claims

1. A multi-frequency, low-power, ultra-wideband radio frequency array near-field non-contact detection system, characterized in that, The system includes a MIMO array system, which comprises an ultra-wideband signal transmission module, an ultra-wideband signal reception module, a transceiver conversion control module, and a MIMO array. Multiple symmetrical transmit and receive units in the MIMO array share the same MIMO physical array, where each array unit employs a microstrip patch antenna. Information is transmitted through a signal interface. The MIMO antenna units sequentially transmit ultra-wideband radio frequency signals to the near-field region and simultaneously receive and sample the echo signals from the object under test. The ultra-wideband radio frequency signal consists of multiple ultra-narrow probe pulses, and the echo signal of each probe pulse is sampled at multiple frequency points.

2. The multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system as described in claim 1, characterized in that, The ultra-wideband signal transmitting module includes a radio frequency signal generation, frequency multiplication, power amplification, and power distribution unit; the ultra-wideband receiving module includes an LNA high-gain receiver, a mixer, a dynamic filter, and a gain control unit.

3. The multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system as described in claim 1, characterized in that, The transceiver control module includes a clock synchronization signal, dynamic control of the transmit / receive conversion, and a micro-error adjustment unit.

4. The multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system as described in claim 1, characterized in that, The ultra-wideband signal transmission module and ultra-wideband signal reception module are Ka-band 96 pairs of symmetrical MIMO arrays for transmission and reception. The effective detection, reception and sampling period of each pair of transmission or reception array units is 10 milliseconds, and the horizontal detection period of the entire MIMO array is 960 milliseconds.

5. The multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system as described in claim 1, characterized in that, Each transmitted ultra-wideband radio frequency signal contains 383 effective probe pulses, and the echo signal of each pulse is sampled at 300 frequency points. The MIMO array detection period includes 383×300×96 sampled data, which takes 10 milliseconds.

6. The multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system as described in claim 1, characterized in that, The MIMO antenna array has a scanning speed of 4 millimeters per second and takes 125 seconds to complete a 1000 mm × 500 mm detection area.

7. A detection method based on the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system according to any one of claims 1-6, characterized in that, include: The transmitting MIMO antenna array sequentially transmits ultra-wideband radio frequency pulse signals in the range of 20.8 GHz to 28 GHz, and the receiving MIMO array receives the echo signals from the target under test. Each ultra-wideband radio frequency signal contains 383 effective probe pulses, and the echo signal of each pulse is sampled at 300 frequency points. The MIMO array detects 383×300×96 groups of samples, which are then amplified by an LNA and down-converted to the baseband. The data from the detected signals are processed, and imaging algorithms are used to create images.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the detection method of the near-field non-contact detection system of the multi-frequency low-power ultra-wideband radio frequency array as described in claim 7.

9. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium is used to store computer instructions, which, when executed by a processor, implement the detection method of the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system as described in claim 7.

10. An electronic device, characterized in that, include: The device includes a processor, a memory, and a computer program; wherein the processor is connected to the memory, and the computer program is stored in the memory. When the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to perform the detection method of the multi-frequency low-power ultra-wideband radio frequency array near-field non-contact detection system as described in claim 7.

Images