Multi-band ultrahigh frequency detection device and method and computer readable storage medium

Abstract

The embodiment of the invention discloses a multi-band ultrahigh frequency detection device, a multi-band ultrahigh frequency detection method and a computer readable storage medium. The multi-band ultrahigh frequency detection device comprises an ultrahigh frequency sensor, a front-end processing module and an acquisition module. The ultrahigh frequency sensor is used for collecting an electric signal sent by a measured object. The front-end processing module comprises a band-pass filter circuit and a detection filter circuit, and the band-pass filter circuit is used for separating the electric signal into multiple sub-band signals of different wavebands; the detection filter circuit is used for collecting effective content in each sub-band signal to obtain a detection signal. And the acquisition module is used for converting the multiple paths of detection signals into ultrahigh-frequency acquisition information and uploading the ultrahigh-frequency acquisition information, and the ultrahigh-frequency acquisition information is used for representing the working condition state of the detected object. Therefore, the ultrahigh frequency acquisition information under different frequency bands can be effectively acquired, and synchronous acquisition of the ultrahigh frequency acquisition information of multiple independent frequency bands can be realized.

Description

Technical Field

[0001] This application belongs to the technical field, and in particular relates to a multi-band ultra-high frequency detection device, a multi-band ultra-high frequency detection method, and a computer-readable storage medium. Background Technology

[0002] Gas-insulated switchgear (GIS) and other gas-insulated equipment inevitably develops insulation defects during production, transportation, assembly, and operation, such as conductor sharpness or scratches, floating potential, or abnormal insulator surfaces. These defects can cause partial discharge under the influence of an electric field, and even insulation breakdown under overvoltage. Partial discharge detection, as an effective means of detecting insulation defects, plays an important role in the insulation assessment and diagnosis of power equipment. Based on the physical phenomena of charge movement, electromagnetic wave propagation, sound wave propagation, and light radiation caused by partial discharge, various partial discharge measurement methods have been developed, including pulse current method, ultra-high frequency (UHF) method, ground wave method, ultrasonic method, and optical method. Ultrasonic detection technology mainly detects partial discharge signals in the frequency range of 20kHz to 200kHz. High-frequency current transformers mainly measure pulse current signals in the frequency band of 3MHz to 30MHz through high-frequency coils (HFCT). Ground wave (TEV) detection technology is mainly for the frequency range of 3MHz to 100MHz, while ultra-high frequency (UHF) detection technology is applied in the frequency range of 300MHz to 2GHz. UHF detection technology boasts excellent characteristics such as high sensitivity and strong anti-interference capabilities, and is widely used in online partial discharge monitoring systems for GIS. However, existing equipment can only acquire signals from a single frequency band for UHF, resulting in unsatisfactory detection performance. Even when acquiring multiple signals, signal interference between them is difficult to avoid. How to acquire multi-band UHF information to improve detection efficiency and accuracy is a technical problem that urgently needs to be solved by those skilled in the art.

[0003] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0004] Based on this, it is necessary to address the above problems by proposing a multi-band UHF detection device, a multi-band UHF detection method, and a computer-readable storage medium, which can realize the synchronous acquisition of UHF information from multiple independent frequency bands.

[0005] The technical problem solved by this application is achieved by the following technical solution:

[0006] This application provides a multi-band ultra-high frequency (UHF) detection device, including an UHF sensor, a front-end processing module, and an acquisition module: the UHF sensor, the front-end processing module, and the acquisition module are connected sequentially; the UHF sensor consists of an antenna and a dielectric substrate, which are overlapped, and the antenna is used to acquire electrical signals emitted by the object under test; the front-end processing module includes a band-pass filter circuit and a detector filter circuit, which are connected sequentially, the band-pass filter circuit includes n band-pass filters, and the detector filter circuit includes n detection channels, where n is an integer greater than 1; the band-pass filter circuit is used to separate the electrical signal into n sub-band signals of different frequency bands, and transmit the sub-band signals to the corresponding detection channels in the detector filter circuit through the band-pass filters; the detector filter circuit is used to acquire the effective content in each sub-band signal to obtain a detection signal, and transmit it to the acquisition module; the acquisition module includes n conversion units, used to convert multiple detection signals into UHF acquisition information and upload it, the UHF acquisition information being used to characterize the operating status of the object under test.

[0007] In an optional embodiment of this application, the antenna is made of a conductive material and the dielectric substrate is made of an insulating material; the thickness of the first material of the antenna is lower than the thickness of the second material of the insulating material; the conductor setting parameters are calculated based on the thickness of the first material, the thickness of the second material, the conductor angular growth rate, and the conductor angle; the antenna and the dielectric substrate are set according to the conductor setting parameters so that the antenna and the dielectric substrate overlap to form a preset shape.

[0008] In an optional embodiment of this application, the front-end processing module further includes: a filtering and amplifying circuit; the filtering and amplifying circuit includes an acquisition unit and a processing unit, which are connected sequentially; the acquisition unit is connected to an ultra-high frequency sensor and is used to acquire the electrical signal collected by the ultra-high frequency sensor and process the electrical signal to obtain a preprocessed signal, the preprocessed signal being within a preset ultra-high frequency range; the preprocessed signal is transmitted to the processing unit; the processing unit is used to perform preprocessing operations on the preprocessed signal to obtain a frequency band signal, the preprocessing operations including at least one of noise reduction and gain; and the frequency band signal is sent to a bandpass filter circuit, the frequency band signals acquired by each bandpass filter being the same.

[0009] In an optional embodiment of this application, the detection and filtering circuit includes: a radio frequency gain element and a radio frequency detection element; the radio frequency gain element is used to suppress the sub-band signal from a very high frequency signal to a low frequency signal of a preset frequency; the radio frequency detection element is used to convert the sub-band signal into a DC voltage signal; and the sub-band signal processed by the radio frequency gain element and the radio frequency detection element is marked as a detection signal.

[0010] In an optional embodiment of this application, the multi-band ultra-high frequency detection device further includes: a host computer; the host computer is used to acquire ultra-high frequency acquisition information uploaded by the acquisition module, process the ultra-high frequency acquisition information, and determine whether there is an abnormality in the detected area of ​​the object being tested.

[0011] This application also provides a multi-band ultra-high frequency (UHF) detection method, applied to the multi-band UHF detection device as described above, comprising the following steps: an UHF sensor acquires the electrical signal emitted by the object under test and sends it to a front-end processing module; a bandpass filter circuit in the front-end processing module separates the electrical signal into n sub-band signals, the sub-band signals having different frequency bands, where n is an integer greater than 1; a detector filter circuit in the front-end processing module processes each sub-band signal to obtain a detection signal, the detection signal being the valid content within the sub-band signal; an acquisition module acquires all detection signals, converts the detection signals into UHF acquisition information, and uploads it, the UHF acquisition information being used to characterize the operating state of the object under test.

[0012] In an optional embodiment of this application, the front-end processing module further includes: a filtering and amplifying circuit; before the bandpass filtering circuit in the front-end processing module separates the electrical signal into n sub-frequency band signals, the method further includes: processing the electrical signal through the filtering and amplifying circuit to obtain a pre-processed signal, the pre-processed signal being within a preset ultra-high frequency range; the filtering and amplifying circuit performing a pre-processing operation on the pre-processed signal, the pre-processing operation including at least one of noise reduction and gain; marking the pre-processed signal as a frequency band signal, and simultaneously sending the frequency band signal to the bandpass filtering circuit to obtain the sub-frequency band signals.

[0013] In an optional embodiment of this application, the detection and filtering circuit in the front-end processing module processes each sub-frequency band signal to obtain a detection signal, including: suppressing the sub-frequency band signal from a very high frequency signal to a low frequency signal of a preset frequency; converting the sub-frequency band signal into a DC voltage signal; and marking the processed sub-frequency band signal as a detection signal.

[0014] In an optional embodiment of this application, the multi-band ultra-high frequency detection device further includes: a host computer; after converting the detection signal into ultra-high frequency acquisition information and uploading it, the method further includes: the host computer acquiring the ultra-high frequency acquisition information and processing the ultra-high frequency acquisition information to determine whether there is an abnormality in the detected area of ​​the object being tested.

[0015] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method as described above.

[0016] The embodiments of this application have the following beneficial effects:

[0017] This application can effectively acquire UHF acquisition information under different frequency bands and can realize the synchronous acquisition of UHF acquisition information in multiple independent frequency bands.

[0018] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it according to the contents of the specification, and to make the above and other objects, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] in:

[0021] Figure 1 This is a first structural schematic diagram of a multi-band ultra-high frequency detection device provided in one embodiment;

[0022] Figure 2 This is a schematic diagram of the device structure of an ultra-high frequency sensor provided in one embodiment;

[0023] Figure 3 This is a second structural schematic diagram of a multi-band ultra-high frequency detection device provided in one embodiment;

[0024] Figure 4 This is a schematic diagram of the third structure of a multi-band ultra-high frequency detection device provided in one embodiment;

[0025] Figure 5 This is a fourth structural schematic diagram of a multi-band ultra-high frequency detection device provided in one embodiment;

[0026] Figure 6 This is a flowchart illustrating a multi-band ultra-high frequency detection method provided in one embodiment;

[0027] Figure 7 This is a schematic block diagram of the structure of a computer device provided in one embodiment. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] Existing equipment can only acquire signals from a single frequency band for UHF signals, resulting in unsatisfactory detection performance. Even when acquiring multiple signals, signal interference between them is difficult to avoid. To address the problem of the inability to independently and synchronously acquire UHF signals, this application proposes a multi-band UHF detection device. For a clear description of the multi-band UHF detection device provided in this embodiment, please refer to... Figures 1-5 .

[0030] A multi-band ultra-high frequency (UHF) detection device 100 includes an UHF sensor 110, a front-end processing module 120, and a data acquisition module 130. The UHF sensor 110, front-end processing module 120, and data acquisition module 130 are connected sequentially. The UHF sensor 110 consists of an antenna 111 and a dielectric substrate 112, which are overlapped. The antenna 111 is used to acquire electrical signals emitted by the object under test. The front-end processing module 120 includes a bandpass filter circuit 121 and a detector filter circuit 122, which are connected sequentially. The bandpass filter circuit 121 includes n bandpass filters 121a. The detection and filtering circuit 122 includes n detection channels 122a, where n is an integer greater than 1; the bandpass filter circuit 121 is used to separate the electrical signal into n sub-frequency band signals of different frequency bands, and transmit the sub-frequency band signals to the corresponding detection channels 122a in the detection and filtering circuit 122 through the bandpass filter 121a; the detection and filtering circuit 122 is used to collect the effective content in each sub-frequency band signal to obtain the detection signal, and transmit it to the acquisition module 130; the acquisition module 130 includes an n-channel conversion unit 131, which is used to convert the multiple detection signals into UHF acquisition information and upload it. The UHF acquisition information is used to characterize the working condition of the object under test.

[0031] In one embodiment, for ease of explanation, the multi-band ultra-high frequency detection device 100 of this embodiment architecture can be referred to Figure 1 .like Figure 1The first structure of the multi-band ultra-high frequency (UHF) detection device 100 shown includes an UHF sensor 110, a front-end processing module 120, and a data acquisition module 130. The UHF sensor 110 consists of an antenna 111 and a dielectric substrate 112, which are overlapped. The antenna 111 is used to acquire electrical signals emitted by the object under test. The specific structures of the antenna 111 and the dielectric substrate 112 will be detailed later and will not be elaborated here. Furthermore, the UHF sensor 110 can also be configured to conform to the shape of the object's outer shell, such as a circle, thereby acquiring more electrical signals leaked from the outer surface of the object under test (e.g., GIS).

[0032] Furthermore, the front-end processing module 120 includes a bandpass filter circuit 121 and a detection filter circuit 122. The bandpass filter circuit 121 and the detection filter circuit 122 are connected sequentially. The bandpass filter circuit 121 includes n bandpass filters 121a, and the detection filter circuit 122 includes n detection channels 122a, where n is an integer greater than 1. That is, the number of bandpass filters 121a corresponds one-to-one with the number of detection channels 122a. In this embodiment, for ease of explanation, combined with... Figure 1 n is set to 3. Further, the bandpass filter circuit 121 is used to separate the electrical signal into n sub-band signals of different frequency bands, and transmits the sub-band signals to the corresponding detection channel 122a within the detection filter circuit 122 through the bandpass filter 121a. The bandpass filter circuit 121 separates the electrical signal into sub-band signals of different frequency bands through different bandpass filters 121a; the number of sub-band signals that can be separated depends on the number of bandpass filters 121a configured in the bandpass filter circuit 121. Furthermore, the bandpass filters 121a are different from each other, specifically in that their passbands are different. In this embodiment, specifically: the first bandpass filter 121a has a passband of 300MHz-600MHz, the second bandpass filter 121a has a passband of 600MHz-900MHz, and the third bandpass filter 121a has a passband of 900MHz-1.2GHz. This allows the bandpass filter circuit 121 to separate ultra-high frequency electrical signals of different bands and transmit them to the detector filter circuit 122. Furthermore, it can be seen that the bandpass filters 121a are independent of each other; therefore, they acquire the same signal but process it in different ways, resulting in independent and non-interfering signal passbands. By splitting one signal into multiple signals, different signals can be acquired independently, without interference, and synchronously, improving acquisition efficiency and accuracy.

[0033] The detection channel 122a within the detection and filtering circuit 122 corresponds one-to-one with the bandpass filter 121a of the bandpass circuit, enabling the detection and filtering circuit 122 to acquire the effective content within each sub-frequency band signal to obtain a detection signal, which is then transmitted to the acquisition module 130. In a preferred embodiment, the pulse response time of the detection signal output by the detection and filtering circuit 122 is no higher than 20ns, and the frequency of the output low-frequency signal is no higher than 100MHz.

[0034] The acquisition module 130 includes an n-channel conversion unit 131, as referenced. Figure 1 Paper jams occur, and the conversion unit 131 corresponds one-to-one with the bandpass filter 121a and the detection channel 122a. It processes multiple detection signals, specifically converting them into UHF acquisition information and uploading it. This UHF acquisition information is used to characterize the operating state of the object under test. The conversion unit 131 can be composed of a multi-channel A / D module with n channels, each channel synchronously acquiring and processing the pulse voltage signal output from the front-end processing module 120.

[0035] In one embodiment, the antenna 111 is made of a conductive material and the dielectric substrate 112 is made of an insulating material; the thickness of the first material of the antenna 111 is lower than the thickness of the second material of the insulating material; the conductor setting parameters are calculated based on the thickness of the first material, the thickness of the second material, the conductor angular growth rate and the conductor angle, and the antenna 111 and the dielectric substrate 112 are set according to the conductor setting parameters so that the antenna 111 and the dielectric substrate 112 overlap to form a preset shape.

[0036] In one embodiment, the specific structure of the ultra-high frequency sensor 110 can be referred to... Figure 2 . Figure 2 The diagram below shows the device structure of the ultra-high frequency sensor 110. Preferably, the antenna 111 is fabricated by etching one side of the substrate. The conductive material of the antenna 111 can be copper-plated tin conductor with a thickness of 0.03 mm; the insulating material of the substrate can be epoxy resin with a thickness of 1 mm.

[0037] The antenna 111 and the dielectric substrate 112 are stacked together, specifically spiraling into a double-armed Archimedean spiral conductor. The conductor configuration parameters for setting the shape of each arm of the spiral conductor can be obtained by the following formula:

[0038] R(θ)=r0+kθ (1)

[0039] Where r0 is the initial radius of the helical conductor, k is the angular growth rate of the helical conductor, and θ is the angle of the helical conductor. Preferably, the conductor settings can be: initial radius of 0.5 mm, angular growth rate of 0.5, and number of turns of 10.

[0040] In one embodiment, the front-end processing module 120 further includes: a filtering and amplifying circuit 123; the filtering and amplifying circuit 123 includes an acquisition unit 123a and a processing unit 123b, which are connected sequentially; the acquisition unit 123a is connected to the ultra-high frequency sensor 110 and is used to acquire the electrical signal collected by the ultra-high frequency sensor 110, and process the electrical signal to obtain a preprocessed signal, which is within a preset ultra-high frequency range; the preprocessed signal is transmitted to the processing unit 123b; the processing unit 123b is used to perform preprocessing operations on the preprocessed signal to obtain a frequency band signal, the preprocessing operations including at least one of noise reduction and gain; and the frequency band signal is sent to the bandpass filter circuit 121, wherein the frequency band signals acquired by each bandpass filter 121a are the same.

[0041] In one embodiment, for ease of explanation of the structure of the multi-band ultra-high frequency detection device 100 with filter amplification circuit 123, please refer to... Figure 3 , Figure 3 This is a second structural schematic diagram of the multi-band ultra-high frequency detection device 100. The front-end processing module 120 also includes a filter amplification circuit 123. Further, as shown... Figure 3 As shown, the filter amplifier circuit 123 is positioned before the bandpass filter circuit 121 and the detector filter circuit 122, and is connected to the bandpass filter circuit 121.

[0042] Furthermore, the filter amplification circuit 123 includes an acquisition unit 123a and a processing unit 123b, which are connected sequentially. Both the acquisition unit 123a and the processing unit 123b are single-channel configurations. Specifically, the acquisition unit 123a is connected to the UHF sensor 110 and is used to acquire the electrical signal collected by the UHF sensor 110 and process the electrical signal to obtain a pre-processed signal within a preset UHF frequency range. That is, although the UHF sensor 110 can primarily acquire UHF electrical signals, some interference and noise still exist. Therefore, the acquisition unit 123a can extract the electrical signal within a set operating center wavelength range to determine the pre-processed signal within the preset UHF frequency band. The operating center wavelength of the acquisition unit 123a can be 800MHz, and the bandwidth of the acquired pre-processed signal can be 300MHz-1.2GHz.

[0043] The processing unit 123b may consist of an RF gain element 122c, which performs preprocessing operations on the preprocessed signal to obtain a frequency band signal. The preprocessing operations include at least one of noise reduction and gain adjustment, i.e., gaining the preprocessed signal, filtering out initial noise from the preprocessed signal, etc. In a preferred embodiment, the gain is not less than 20 dB. The preprocessed frequency band signal can then be distributed to each bandpass filter 121a for subsequent processing, and it is understood that the frequency band signal acquired by each bandpass filter 121a is the same as that acquired by the others.

[0044] In one embodiment, the detection and filtering circuit 122 includes: an RF gain element 122c and an RF detector element 122d; the RF gain element 122c is used to suppress the sub-band signal from a very high frequency signal to a low frequency signal of a preset frequency; the RF detector element 122d is used to convert the sub-band signal into a DC voltage signal; and the sub-band signal processed by the RF gain element 122c and the RF detector element 122d is marked as a detection signal.

[0045] In one embodiment, for ease of explanation of the structure of the multi-band ultra-high frequency detection device 100 with RF gain element 122c and RF detection element 122d, please refer to... Figure 4 , Figure 4 This is a schematic diagram of the third structure of the multi-band ultra-high frequency detection device 100. The detection and filtering circuit 122 includes: an RF gain element 122c and an RF detection element 122d. Figure 4 and Figure 1 As can be seen from the comparison, Figure 4 The detection channel 122a is omitted. This arrangement is because the RF gain element 122c and the RF detector element 122d can be included within the detection channel 122a, functioning as internal modules of the detection channel 122a; alternatively, they can be located outside the detection channel 122a, functioning as parallel functional modules. There are no specific limitations; they can be arbitrarily set according to the actual situation. Therefore, the description is as follows... Figure 4 The diagram shows the architecture.

[0046] Furthermore, the RF gain element 122c and the RF detector element 122d function to provide interference suppression and convert the ultra-high frequency sub-band signal into a low-frequency signal output. Specifically, the RF gain element 122c is used to suppress the sub-band signal from an ultra-high frequency signal to a low-frequency signal of a preset frequency; the RF detector element 122d is used to convert the sub-band signal into a DC voltage signal. The processed sub-band signal is then marked as a detection signal and delivered to the acquisition module 130 for processing. Regarding the processing effect, in a preferred embodiment, the detection signal has a pulse response time of no more than 20 ns and an output low-frequency signal frequency of no more than 100 MHz.

[0047] In one embodiment, the multi-band ultra-high frequency detection device 100 further includes a host computer 140; the host computer 140 is used to acquire ultra-high frequency acquisition information uploaded by the acquisition module 130, process the ultra-high frequency acquisition information, and determine whether there is an abnormality in the inspected area of ​​the object under test.

[0048] In one embodiment, for ease of explanation of the structure of the multi-band ultra-high frequency detection device 100 with host computer 140, please refer to... Figure 5 , Figure 5 This is a schematic diagram of the fourth structure of the multi-band ultra-high frequency detection device 100. (See diagram below.) Figure 5 As shown, the multi-band UHF detection device 100 also includes a host computer 140, which is connected to the acquisition module 130. The host computer 140 acquires UHF acquisition information uploaded by the acquisition module 130, processes the UHF acquisition information, and determines whether there are any anomalies in the inspected area of ​​the tested object. The host computer 140 can be a mobile terminal or a server, among other devices. Specifically, the mobile terminal can take the form of, but is not limited to, mobile phones, tablets, personal digital assistants (PDAs), mobile internet devices (MIDs), and wearable devices (such as smartwatches). Applications (such as apps) on the mobile terminal can process and display relevant information and perform corresponding operations, thereby improving efficiency.

[0049] Furthermore, the host computer 140 can connect to the acquisition module 130 via wireless communication technology. Wireless communication technologies may include, but are not limited to: Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (W-CDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Bluetooth, Wireless Fidelity (WiFi) (such as IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and / or IEEE 802.11n standards), Voice over Internet Protocol (VoIP), Worldwide Interoperability for Microwave Access (Wi-Max), other protocols for email, instant messaging, and short messages, and any other suitable communication protocols, even those not yet developed.

[0050] Therefore, the multi-band UHF detection device 100 provided in this application can effectively acquire UHF acquisition information under different frequency bands and can realize the synchronous acquisition of UHF acquisition information under multiple independent frequency bands. For acquiring and detecting multi-band UHF signals of gas-insulated combined electrical appliances discharge, experimental results show that the UHF detection results are reliable, and it can effectively acquire UHF information under different frequency bands, enabling the synchronous acquisition of UHF signals under multiple independent frequency bands.

[0051] The specific architecture of the multi-band UHF detection device 100 has been detailed above, but it is known that the device requires a corresponding method to complete data acquisition. Therefore, this application proposes a multi-band UHF detection method applied to the multi-band UHF detection device 100. For a clear description of the method provided in this application, please refer to [reference needed]. Figures 1-6 This includes steps S110 to S130.

[0052] Step S110: The ultra-high frequency sensor 110 collects the electrical signal emitted by the object under test and sends it to the front-end processing module 120.

[0053] In one embodiment, an ultra-high frequency sensor 110 is disposed on the outer surface of the object under test. If the GIS (Gas Insulated Switchgear) under test has insulation defects, it will cause partial discharge under the action of an electric field. This partial discharge can be captured by the ultra-high frequency sensor 110 in the form of an electrical signal. After repeating the process on the outer surface of the object under test several times, a sufficiently rich amount of electrical signal can be collected. The electrical signal is then transmitted to the front-end processing module 120 for processing, converting it into a signal format that can be used for analysis.

[0054] Step S120: The bandpass filter circuit 121 in the front-end processing module 120 separates the electrical signal into n sub-frequency band signals. The sub-frequency band signals have different frequency bands, and n is an integer greater than 1. The detector filter circuit 122 in the front-end processing module 120 processes each sub-frequency band signal to obtain a detection signal. The detection signal is the valid content within the sub-frequency band signal.

[0055] In one embodiment, the front-end processing module 120 further includes a filter amplification circuit 123. Step S120: Before the bandpass filter circuit 121 in the front-end processing module 120 separates the electrical signal into n sub-band signals, the method further includes: processing the electrical signal through the filter amplification circuit 123 to obtain a pre-processed signal, the pre-processed signal being within a preset ultra-high frequency range; the filter amplification circuit 123 performing a pre-processing operation on the pre-processed signal, the pre-processing operation including at least one of noise reduction and gain adjustment; marking the pre-processed signal as a frequency band signal, and simultaneously sending the frequency band signal to the bandpass filter circuit 121 to obtain the sub-band signals.

[0056] In one embodiment, reference Figure 1 , Figure 3 The multi-band ultra-high frequency detection device 100 shown includes a multi-channel bandpass filter circuit 121 and a detection filter circuit 122, and a filter amplifier circuit 123 may be provided before the bandpass filter circuit 121. Specifically, when the front-end processing module 120 obtains the electrical signal collected by the ultra-high frequency sensor 110, it can be handed over to the filter amplifier circuit 123 for operation.

[0057] Firstly, the signals collected and analyzed in this application are ultra-high frequency (UHF) signals. Therefore, a filtering process is required to remove signals outside the UHF frequency band, thereby obtaining a preprocessed signal within a preset UHF frequency range. In a preferred embodiment, the bandwidth of the acquired preprocessed signal can be 300MHz-1.2GHz.

[0058] Secondly, the preprocessed signal needs to be preprocessed to improve its effective content and remove useless interference. Therefore, the preprocessing operation includes at least one of noise reduction and gain, that is, gaining the preprocessed signal, filtering out the initial noise of the preprocessed signal, etc. In a preferred embodiment, the gain is not less than 20dB.

[0059] After the above processing, the signal can be marked as a frequency band signal. This frequency band signal can then be copied multiple times, with each copy identically passed to the bandpass filter circuit 121 to complete subsequent operations. It is worth noting that, as referenced... Figure 1 , Figure 3 The bandpass filter circuit 121 shown includes n bandpass filters 121a, and in fact, the frequency band signals accepted by each bandpass filter 121a are exactly the same as each other.

[0060] In one embodiment, the bandpass filters 121a are different from each other, specifically in that their passbands are different. Specifically, in this embodiment, the first bandpass filter 121a has a passband of 300MHz-600MHz, the second bandpass filter 121a has a passband of 600MHz-900MHz, and the third bandpass filter 121a has a passband of 900MHz-1.2GHz. This allows the bandpass filter circuit 121 to separate ultra-high frequency electrical signals of different bands and transmit them to the detector filter circuit 122. Furthermore, it can be seen that the bandpass filters 121a are independent of each other; therefore, they acquire the same signal but process it in different ways, resulting in independent and non-interfering passbands. By dividing one into many, different signals can be acquired independently, without interference, and synchronously, improving acquisition efficiency and accuracy.

[0061] In one embodiment, the detection and filtering circuit 122 in the front-end processing module 120 processes each sub-band signal to obtain a detection signal, including: suppressing the sub-band signal from a very high frequency signal to a low frequency signal of a preset frequency; converting the sub-band signal into a DC voltage signal; and marking the processed sub-band signal as a detection signal.

[0062] In one embodiment, the detection channel 122a within the detection filter circuit 122 corresponds one-to-one with the bandpass filter 121a of the bandpass circuit, enabling the detection filter circuit 122 to acquire the effective content within each sub-frequency band signal to obtain a detection signal, which is then transmitted to the acquisition module 130. In a preferred embodiment, the pulse response time of the detection signal output by the detection filter circuit 122 is no higher than 20ns, and the frequency of the output low-frequency signal is no higher than 100MHz.

[0063] Further, the detection and filtering circuit 122 includes: an RF gain element 122c and an RF detector element 122d. The RF gain element 122c and the RF detector element 122d function to provide interference suppression and convert the ultra-high frequency sub-band signal into a low-frequency signal output. Specifically, the RF gain element 122c is used to suppress the sub-band signal from an ultra-high frequency signal to a low-frequency signal of a preset frequency; the RF detector element 122d is used to convert the sub-band signal into a DC voltage signal. The processed sub-band signal is then marked as a detection signal and delivered to the acquisition module 130 for processing. Regarding the processing effect, in a preferred embodiment, the detection signal has a pulse response time of no more than 20 ns and an output low-frequency signal frequency of no more than 100 MHz.

[0064] Step S130: The acquisition module 130 acquires all detection signals, converts the detection signals into UHF acquisition information and uploads it. The UHF acquisition information is used to characterize the working condition of the object under test.

[0065] In one embodiment, the conversion unit 131 of the acquisition module 130 can be composed of a multi-channel A / D component, with n channels. Each channel synchronously acquires and processes the pulse voltage signal output by the front-end processing module 120. This converts each sub-frequency band signal into analyzable UHF acquisition information.

[0066] In one embodiment, the multi-band ultra-high frequency detection device 100 further includes a host computer 140; after converting the detection signal into ultra-high frequency acquisition information and uploading it, the method further includes: the host computer 140 acquiring the ultra-high frequency acquisition information and processing the ultra-high frequency acquisition information to determine whether there is an abnormality in the inspected area of ​​the object being tested.

[0067] In one embodiment, the UHF acquisition information can be uploaded to a host computer 140. The host computer 140 can be a computing device with memory and a processor, such as a mobile terminal. By processing the UHF acquisition information using a preset method, it can be determined whether there are any abnormalities in the inspected area of ​​the tested object. The determination process may include, but is not limited to, determining whether the corresponding values ​​are within a preset range, whether the rate of change is abnormal, etc. This application does not limit how the host computer 140 makes these determinations.

[0068] Therefore, this application can effectively acquire UHF acquisition information under different frequency bands and can realize the synchronous acquisition of UHF acquisition information in multiple independent frequency bands.

[0069] Figure 7 An internal structural diagram of a computer device in one embodiment is shown. This computer device can specifically be a terminal or a server. Figure 7As shown, the computer device includes a processor, memory, and network interface connected via a system bus. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and may also store a computer program. When executed by the processor, this computer program enables the processor to implement a multi-band ultra-high frequency (UHF) detection method. The internal memory may also store a computer program, which, when executed by the processor, enables the processor to implement the multi-band UHF detection method. Those skilled in the art will understand that… Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0070] In one embodiment, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the steps of the method described above.

[0071] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A multi-band ultra-high frequency detection device, characterized in that, It includes an ultra-high frequency sensor, a front-end processing module, and a data acquisition module: the ultra-high frequency sensor, the front-end processing module, and the data acquisition module are connected in sequence; The ultra-high frequency sensor consists of an antenna and a dielectric substrate, which are arranged in an overlapping manner. The antenna is used to collect electrical signals emitted by the object under test. The front-end processing module includes a bandpass filter circuit and a detection filter circuit, which are connected sequentially. The bandpass filter circuit includes n bandpass filters, and the detection filter circuit includes n detection channels, where n is an integer greater than 1. The bandpass filter circuit is used to separate the electrical signal into n sub-frequency band signals of different frequency bands, and transmit the sub-frequency band signals to the corresponding detection channels in the detection filter circuit through the bandpass filters. The detection filter circuit is used to acquire the effective content within each sub-frequency band signal to obtain a detection signal, and transmit it to the acquisition module. The acquisition module includes an n-channel conversion unit, which is used to convert the multiple detection signals into UHF acquisition information and upload it. The UHF acquisition information is used to characterize the working condition of the object under test.

2. The multi-band ultra-high frequency detection device as described in claim 1, characterized in that, The antenna is made of a conductive material, and the dielectric substrate is made of an insulating material. The thickness of the first material of the antenna is lower than the thickness of the second material of the insulating material; Conductor setting parameters are calculated based on the thickness of the first material, the thickness of the second material, the conductor angular growth rate, and the conductor angle. The antenna and the dielectric substrate are set according to the conductor setting parameters, so that the antenna and the dielectric substrate overlap to form a preset shape.

3. The multi-band ultra-high frequency detection device as described in claim 1, characterized in that, The front-end processing module further includes: a filtering and amplification circuit; The filter amplification circuit includes an acquisition unit and a processing unit, which are connected sequentially. The acquisition unit is connected to the ultra-high frequency sensor and is used to acquire the electrical signal collected by the ultra-high frequency sensor, process the electrical signal to obtain a preprocessed signal, the preprocessed signal being within a preset ultra-high frequency range; and transmit the preprocessed signal to the processing unit. The processing unit is configured to perform preprocessing operations on the preprocessed signal to obtain a frequency band signal, the preprocessing operations including at least one of noise reduction and gain; and to send the frequency band signal to the bandpass filter circuit, wherein the frequency band signal obtained by each of the bandpass filters is the same as that of each other.

4. The multi-band ultra-high frequency detection device as described in claim 1, characterized in that, The detection and filtering circuit includes: an RF gain element and an RF detection element; The radio frequency gain element is used to suppress the sub-band signal from an ultra-high frequency signal to a low frequency signal of a preset frequency. The radio frequency detector element is used to convert the sub-band signal into a DC voltage signal; The sub-band signal processed by the radio frequency gain element and the radio frequency detection element is labeled as the detection signal.

5. The multi-band ultra-high frequency detection device as described in claim 1, characterized in that, The multi-band ultra-high frequency detection device also includes: a host computer; The host computer is used to acquire the UHF acquisition information uploaded by the acquisition module, process the UHF acquisition information, and determine whether there is an anomaly in the inspected area of ​​the tested object.

6. A multi-band ultra-high frequency detection method, characterized in that, The multi-band ultra-high frequency detection device as described in claim 1 includes the following steps: The ultra-high frequency sensor collects the electrical signals emitted by the object under test and sends them to the front-end processing module; The bandpass filter circuit in the front-end processing module separates the electrical signal into n sub-frequency band signals, where the frequency bands of the sub-frequency band signals are different from each other, and n is an integer greater than 1; the detection filter circuit in the front-end processing module processes each sub-frequency band signal to obtain a detection signal, which is the valid content within the sub-frequency band signal; The acquisition module acquires all the detection signals, converts the detection signals into UHF acquisition information and uploads it. The UHF acquisition information is used to characterize the working condition of the object under test.

7. The multi-band ultra-high frequency detection method as described in claim 6, characterized in that, The front-end processing module further includes: a filtering and amplification circuit; Before the bandpass filter circuit in the front-end processing module separates the electrical signal into n sub-band signals, the method further includes: The electrical signal is processed by the filtering and amplification circuit to obtain the preprocessed signal, which is within a preset ultra-high frequency range. The filtering and amplifying circuit performs a preprocessing operation on the preprocessed signal, the preprocessing operation including at least one of noise reduction and gain reduction; The preprocessed signal is marked as a frequency band signal, and the frequency band signal is simultaneously sent to the bandpass filter circuit to obtain the sub-frequency band signal.

8. The multi-band ultra-high frequency detection method as described in claim 6, characterized in that, The detection and filtering circuit within the front-end processing module processes each segment of the sub-frequency band signal to obtain a detection signal, including: The sub-band signal is suppressed from an ultra-high frequency signal to a low frequency signal of a preset frequency; Convert the sub-band signal into a DC voltage signal; The processed sub-band signal is labeled as the detection signal.

9. The multi-band ultra-high frequency detection method as described in claim 6, characterized in that, The multi-band ultra-high frequency detection device also includes: a host computer; After converting the detection signal into UHF acquisition information and uploading it, the method further includes: The host computer acquires the UHF acquisition information and processes the UHF acquisition information to determine whether there are any abnormalities in the inspected area of ​​the tested object.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method as described in any one of claims 6 to 9.

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