Portable signal detection equipment based on FPGA (Field Programmable Gate Array)

Abstract

The utility model relates to the field of information detection, and provides FPGA-based portable signal detection equipment, which comprises a shell, an integrated conformal antenna, a signal demodulation module, an FPGA module, a communication module, a storage module, a power supply module, a touch display screen module and an audio output module. The device can receive and demodulate various types of broadcast and communication signals, such as FM / AM broadcast signals, DTMB terrestrial digital television signals and CMMB mobile multimedia broadcast signals, and comprehensively detect and process a physical layer, a code stream layer and an audio and video layer through the FPGA module. And meanwhile, the equipment has the function of transmitting detection data and alarm information back to a monitoring center, so that efficient signal detection and management are realized, and the accuracy and convenience of signal detection are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of information detection, and in particular to a portable signal detection device based on FPGA. BACKGROUND

[0002] Signal detection devices play an important role in modern communication and broadcasting fields. With the rapid development of wireless communication technology, various types of signals such as FM / AM broadcast signals, DTMB terrestrial digital television signals, and CMMB mobile multimedia broadcast signals are widely used. The diversity and complexity of these signals require detection devices to have efficient and accurate signal receiving and processing capabilities. Traditional signal detection devices are usually single-function, which cannot meet the simultaneous detection needs of multiple signal types, limiting their application range and flexibility. Currently, in order to meet the detection needs of multiple types of signals, the industry has adopted various technologies and means. Common methods include using independent receiving antennas to receive different types of signals, and then using dedicated demodulators and processors for signal processing. Another common way is to use high-integration multi-function chips to realize the reception and processing of multiple types of signals. In addition, some high-end devices are also equipped with large-capacity storage units and stable power systems to ensure long-term stable operation. However, these methods generally have problems such as large size, inconvenient operation, etc., which are difficult to meet the needs of portable application scenarios. The existing multi-type signal detection devices can solve the problem of signal receiving and processing to some extent, but there are still obvious shortcomings in actual application. For example, the overall structure of the device is relatively bulky, which is not convenient for carrying and on-site rapid deployment. At the same time, the connection and cooperative work between modules are not flexible enough, resulting in high operation complexity of the device. Therefore, a more compact, portable and efficient signal detection device is needed, which can realize the reception, demodulation, analysis and transmission of multiple types of signals in a small-sized device, thereby improving the practicality and convenience of the device. CONTENT OF THE UTILITY MODEL

[0003] In order to improve the above-mentioned problems of traditional signal detection devices in flexibility and convenience, the present application provides a portable signal detection device based on FPGA.

[0004] The portable signal detection device based on FPGA provided by the present application adopts the following technical scheme:

[0005] The portable signal detection device based on FPGA, characterized in that it comprises:

[0006] a shell,

[0007] An integrated conformal antenna mounted on the top of the shell for receiving and transmitting signals, including receiving FM / AM broadcast signals, DTMB terrestrial digital television signals and CMMB mobile multimedia broadcast signals, and receiving and transmitting communication signals;

[0008] and a signal demodulation module mounted inside the shell for receiving and demodulating multiple types of signals;

[0009] a signal demodulation module for receiving and demodulating multiple types of signals;

[0010] an FPGA module for analyzing and processing the received multiple types of signals;

[0011] a communication module for transmitting detection data and alarm information back to a monitoring center server and responding to configuration information;

[0012] a storage module for storing received audio and video signals;

[0013] a power supply module for supplying power to the integrated conformal antenna and each module inside the shell;

[0014] The signal demodulation module, the communication module, the storage module and the power supply module are coupled with the FPGA module.

[0015] By adopting the above technical solutions, the FPGA-based portable signal detection device can realize the functions of receiving, demodulating and analyzing multiple types of signals. Specifically, the integrated conformal antenna integrates the reception of FM / AM broadcast signals, DTMB terrestrial digital television signals and CMMB mobile multimedia broadcast signals and the reception and transmission of communication signals, so that the device has a wide signal coverage capability; the FPGA module can quickly and effectively detect the received various signals at the physical layer, code stream layer and audio and video layer to ensure signal quality and transmission efficiency; the communication module can timely transmit detection data and alarm information back to the monitoring center server and respond to configuration information, improving the real-time performance and reliability of the system; the storage module can save a large amount of received audio and video signals, facilitating subsequent data analysis and management; the power supply module ensures the continuous and stable operation of each part of the device, prolonging the working time of the device. The shell is compact and light, suitable for use in outdoor or mobile environments.

[0016] In some embodiments, a touch display screen module is mounted on the front of the shell and coupled with the FPGA module for displaying detection results and previewing audio and video signals.

[0017] By adopting the technical scheme, the FPGA-based portable signal detection device can install the touch display screen module on the front surface of the shell, the module is coupled with the FPGA module, and is used for displaying the detection result and previewing the audio and video signals. This design enables the user to intuitively view the working state of the device and the received audio and video content, thereby improving the user experience and operation convenience. Meanwhile, the touch display screen module can also serve as a man-machine interface, facilitating the user to perform various setting and control operations.

[0018] In some embodiments, an audio output module is further coupled with the FPGA module, and the audio output module is used for playing audio.

[0019] By adopting the technical scheme, the FPGA-based portable signal detection device not only can receive multiple types of signals and realize multifunctional signal receiving and transmitting through the integrated conformal antenna, but also has powerful signal demodulation, analysis processing and communication capabilities. In particular, after the audio output module is added, the received audio signals can be played in real time, thereby improving the user experience and the practicability of the device. Meanwhile, the touch display screen module displays the detection result and previews the audio and video signals, thereby further enhancing the man-machine interaction.

[0020] In some embodiments, the integrated conformal antenna includes a receiving antenna and a transmitting antenna, the receiving antenna includes an FM / AM broadcast signal receiving antenna, a DTMB terrestrial digital television signal receiving antenna and a CMMB mobile multimedia broadcast signal receiving antenna, and the transmitting antenna includes a 4G / 5G communication antenna, a WIFI communication antenna and a Beidou communication antenna.

[0021] By adopting the technical scheme, the FPGA-based portable signal detection device can realize multiple types of signal receiving and transmitting functions, the above design not only improves the multifunctionality of the device, but also enhances the signal coverage range and transmission efficiency. Meanwhile, multiple antennas are integrated in the integrated design, so that the device is more compact and portable, and is convenient to carry and use.

[0022] In some embodiments, the FM / AM broadcast signal receiving antenna receives signal frequencies of 76MHz-108MHz and 520KHz-1720KHz.

[0023] By adopting the above technical solution, the FM / AM broadcast signal receiving antenna can cover a wide range of frequency modulation and medium wave frequency ranges, ensuring that the device can receive a variety of broadcast signals, and improving the comprehensiveness and reliability of signal detection. Specifically: Frequency modulation 76MHz-108MHz: This frequency range covers the main frequency modulation bands around the world, enabling the device to receive high-quality frequency modulation broadcast signals in different regions; Medium wave 520KHz-1720KHz: This frequency range covers the standard medium wave broadcast frequency band, further expanding the application range of the device, enabling it to receive more broadcast content.

[0024] These features not only enhance the versatility of the device, but also improve the user experience.

[0025] In some embodiments, the DTMB terrestrial digital television signal receiving antenna and the CMMB mobile multimedia broadcast signal receiving antenna support single-carrier or multi-carrier signal input, and the receiving signal frequency is 470MHz-798MHz.

[0026] By adopting the above technical solution, the portable signal detection device based on FPGA can effectively receive DTMB terrestrial digital television signals. Specifically: Support single-carrier or multi-carrier signal input, making the device more compatible and flexible, and can adapt to different transmission standards and technical requirements in different regions. The receiving signal frequency is 470MHz-798MHz, covering the VHF and UHF frequency bands used in most areas of China, ensuring that the device can work normally in a wide geographical range. By connecting with the FPGA module, real-time monitoring, analysis and alarm functions can be realized, improving the accuracy and reliability of signal detection. In combination with other modules such as the touch display screen module and the audio output module, the detection results and preview audio and video signals can be displayed intuitively, enhancing user experience. In some embodiments, the FPGA module analyzes and processes the received multi-type signals, including physical layer, code stream layer and audio / video layer detection of the received multi-type signals, wherein:

[0027] Physical layer detection of the received multi-type signals includes monitoring of signal strength, signal quality, signal-to-noise ratio, bit error rate and lock state;

[0028] Code stream layer detection of the received multi-type signals includes real-time monitoring, analysis and alarm of the code stream layer, as well as providing index statistics of code stream structure, code rate, empty packet rate, effective bandwidth and PID bandwidth; Audio / video layer detection of the received multi-type signals includes real-time decoding of the selected program video and audio, and displaying the video and audio through the touch display screen module, and playing the audio through the audio output module.

[0029] By adopting the above technical solutions, the FPGA-based portable signal detection device can comprehensively and meticulously detect various types of signals.

[0030] The physical layer detection function can monitor signal strength, signal quality, signal-to-noise ratio, bit error rate, and locking state in real time, ensuring the quality and stability of signal transmission.

[0031] The code stream layer detection function not only realizes real-time monitoring and analysis, but also provides detailed code stream structure, code rate, empty packet rate, effective bandwidth, and PID bandwidth index statistics, which helps to quickly locate the problem.

[0032] The audio and video layer detection function realizes real-time decoding of the selected program video and audio, and displays the video and audio through the touch display screen module, and plays the audio through the audio output module, improving the user experience.

[0033] The above technical means significantly improves the accuracy and efficiency of signal detection, and enhances the reliability and practicality of the system.

[0034] In some embodiments, the FPGA module analyzes and processes the received multi-type signals, which further includes scanning and recording effective frequency points and program lists in the frequency range of 76MHz-108MHz and 520KHz-1720KHz, and sorting the frequency points according to signal strength and signal-to-noise ratio.

[0035] By adopting the above technical solutions, not only the automation degree of the device is improved, the demand for manual operation is reduced, but also the user can quickly obtain high-quality broadcast signal resources. At the same time, this intelligent frequency point management method helps to optimize the signal selection process and improve the user experience.

[0036] By adopting the above technical solutions, the FPGA-based portable signal detection device can realize efficient analysis and processing of various types of signals. Specifically, by transcoding the received video and audio signals, different formats of audio and video signals can be compatible with different terminal devices, improving the flexibility and adaptability of signal transmission and playback. This not only facilitates the user's experience, but also enhances the interoperability and scalability of the system.

[0037] In summary, the present application includes at least one of the following beneficial technical effects:

[0038] 1. Through the design of the integrated conformal antenna, the receiving and transmitting functions of multiple signals are integrated, the integration and portability of the device are significantly improved, the problems of large size and inconvenient operation of traditional devices are solved, the device can be flexibly deployed in residential, office and hotel places and the like, and the mobile monitoring demand is met; 2. The device can comprehensively analyze and process multiple types of signals, including comprehensive detection of physical layer, code stream layer and audio / video layer, receiving and demodulating multiple types of signals, decoding and displaying, index monitoring, code stream analysis, abnormal monitoring of audio / video and transcoding and backhaul and the like, the accuracy and reliability of signal detection are improved, and the efficient detection demand of multiple signal types is met; 3. The device is internally provided with a communication module, can real-time backhaul detection data and alarm information to a monitoring center server, realizes all-round real-time monitoring of the propagation order and broadcast quality of AM / FM and ground digital television signals, effectively guarantees the safe broadcast of ground digital television broadcast, and can respond to configuration information, enhances the remote management and maintenance capability of the device, and makes the device more flexible and reliable in actual application. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A schematic diagram of the appearance structure of the FPGA-based portable signal detection device provided in the present application is shown in the figure;

[0040] Figure 2 A schematic diagram of the hardware structure of the FPGA-based portable signal detection device provided in the present application is shown in the figure. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings, and the described embodiments are only possible technical implementations of the utility model, not all possible implementations. Those skilled in the art can obtain other embodiments by combining the embodiments of the utility model without creative labor, and these embodiments are also within the protection scope of the utility model. The inventor of the application finds that the existing signal detection equipment is generally large in size, inconvenient to carry, and single in function, and cannot meet the rapid detection needs of multiple types of signals, therefore, the application mainly adopts the following portable signal detection equipment based on FPGA, which achieves the effects of reducing the size of the equipment, improving portability and multifunctionality, and the application is further described in detail below. The portable signal detection equipment based on FPGA provided in the embodiments of the application comprises a shell 1, an integrated conformal antenna 2, a signal demodulation module 3, an FPGA module 4, a communication module 5, a storage module 6 and a power supply module 7. The integrated conformal antenna 2 is installed at the top of the shell 1 and is used for transmitting and receiving signals, including receiving FM / AM broadcast signals, DTMB terrestrial digital television signals and CMMB mobile multimedia broadcast signals, and transmitting and receiving communication signals, such as 4G / 5G communication antennas and WIFI communication antennas. The signal demodulation module 3, the communication module 5, the storage module 6 and the power supply module 7 are all installed in the shell 1 and are connected with the FPGA module 4, realizing the functions of receiving, demodulating, analyzing and transmitting multiple types of signals. Specifically, the shell 1 can be made of lightweight high-strength aluminum alloy material, which has good heat dissipation performance and impact resistance. The design of the shell considers ergonomics, so that it is convenient to hold and operate. The integrated conformal antenna 2 is composed of a receiving antenna and a transmitting antenna, and the receiving antenna comprises an FM / AM broadcast signal receiving antenna 21, a DTMB terrestrial digital television signal receiving antenna 22 and a CMMB mobile multimedia broadcast signal receiving antenna 23. The FM / AM broadcast signal receiving antenna 21 receives signals with a frequency of 76MHz-108MHz and a medium wave of 520KHz-1720KHz. The DTMB terrestrial digital television signal receiving antenna 22 and the CMMB mobile multimedia broadcast signal receiving antenna 23 receive signals with a frequency of 470MHz-798MHz, which fully meets the national standard GB 20600-2006 for terrestrial digital television and supports single-carrier or multi-carrier signal input. The transmitting antenna comprises a 4G / 5G communication antenna 24, a WIFI communication antenna 25 and a Beidou communication antenna 26. The integrated conformal antenna 2 is designed in one part of the structure in combination with the structure and the waveband characteristics of each signal, and is conformal with the structure, which reduces the space occupation and improves the signal transmission efficiency.

[0042] The FPGA-based portable signal detection device provided by the embodiments of the present application is further provided with a touch display screen module 8 on the front surface of the shell 1, the touch display screen module 8 is coupled with the FPGA module 4, and is used to display the detection results and preview the audio and video signals. The touch display screen module 8 adopts a high-resolution TFT liquid crystal screen, has the characteristics of touch sensitivity and bright colors. The touch display screen module 8 can not only visually display various parameters of signal detection, but also can preview the audio and video content in real time, so as to facilitate the user to carry out on-site debugging and verification. In addition, an audio output module 9 is further installed on the side of the shell 1, the audio output module 9 is coupled with the FPGA module 4, and is used to play audio. The audio output module 9 mainly includes a loudspeaker and a headphone interface, and the appropriate output mode can be selected according to the user's needs. The loudspeaker adopts a full-band loudspeaker unit, has the advantages of high-fidelity restoration and large dynamic range. The headphone interface supports a standard 3.5mm interface and is compatible with most earphone brands on the market. The signal demodulation module 3 is mainly used for receiving and demodulating multiple types of signals, and a high-performance analog front-end circuit and a high-precision ADC / DAC converter are integrated in the signal demodulation module 3. The analog front-end circuit is responsible for amplifying and filtering the received radio frequency signals, removing noise interference, and ensuring the quality of the signals. The ADC / DAC converter converts the analog signals into digital signals for subsequent processing. The signal demodulation module 3 can also support multiple demodulation algorithms through software configuration, and adapt to different types of signal sources. The FPGA module 4 is the control core of the entire system, which is developed by using the Fudan Micro FMQL484 chip, has strong parallel computing capability and high-speed data processing capability. The FPGA module 4 can not only detect the physical layer, code stream layer and audio and video layer of the received multiple types of signals, but also can scan and record the effective frequency points and program list in the frequency range of 76MHz-108MHz and 520KHz-1720KHz, and sort the frequency points according to the signal strength and signal-to-noise ratio indicators. In addition, the FPGA module 4 also has the function of transcoding the video signal and the audio signal to adapt to different output requirements.

[0043] Specifically,

[0044] The FPGA module 4 supports the detection of DTMB terrestrial digital television signals in the physical layer, code stream layer and audio and video layer. The physical layer includes signal strength, signal quality, signal-to-noise ratio, bit error rate, lock state and other indicators for monitoring. The code stream layer includes real-time monitoring and alarm based on the three-level alarm of TR101 290 standard. After decoding and processing the received signal by the FPGA module 4, the code stream structure, code rate, empty packet rate, effective bandwidth and PID bandwidth indicators can be provided and displayed in real time on the touch display screen module 8 in the form of a pie chart or a column chart. The audio and video layer includes decoding the selected program in real time and displaying the video and audio column on the touch display screen module 8 for real-time preview, and playing the audio through the earphone or the built-in loudspeaker.

[0045] The FPGA module 4 supports FM / AM broadcast signal monitoring at both the physical layer and the audio layer. The physical layer supports signal strength, signal quality, signal-to-noise ratio, and bit error rate index monitoring. The audio and video layer completes real-time playing of selected programs through the FPGA module 4, displays the audio column through the touch display module 8, and plays out through the earphone or built-in speaker.

[0046] The FPGA module 4 supports FM / AM broadcast signal channel scanning function, supports fast scanning of frequency modulation 76MHz-108MHz; medium wave 520KHz-1710KHz frequency range, and records the effective frequency point and program list, and automatically sorts the frequency points according to the signal strength and signal-to-noise ratio index.

[0047] The FPGA module 4 supports video transcoding capability, and the FPGA module 4 supports MPEG-2 / H.264 / AVS / AVS+ format transcoding capability, the video transcoding output is H.264, supports video interlaced to progressive, supports common formats such as 576i, 1080i and 1080P, and the video output code rate can be adjusted in real time according to user demand.

[0048] The FPGA module 4 supports audio transcoding capability, and supports MPEG-1 Layer2 / AAC / AC3 / DRA format transcoding capability, the audio transcoding output is AAC-LC, and the audio output code rate can be adjusted in real time according to user demand.

[0049] The FPGA module 4 can also support using SRT or RTMP protocol to push stream media. The communication module 5 is responsible for returning the detection data and alarm information to the monitoring center server, and can also respond to configuration information. The communication module 5 supports multiple communication protocols such as TCP / IP, MQTT, etc., to ensure the safety and reliability of data transmission. The communication module 5 is also equipped with a certain data caching mechanism, which can ensure the integrity of the data even in the case of unstable network. The storage module 6 is used for real-time acquisition and storage of received audio and video programs, and after real-time transcoding by the FPGA module 4, it is pushed to the center server and then distributed. The storage module 6 can choose a large-capacity solid state disk or flash card as the storage medium, which has the characteristics of fast read-write speed and low power consumption.

[0050] The power supply module 7 supplies power to the integrated conformal antenna 2 and each module in the shell 1. The power supply module 7 can use a rechargeable lithium battery, which has the advantages of long service life and high energy density, ensuring that the outdoor can work independently for more than 3 hours. The power supply module 7 can also be equipped with an intelligent battery management system, which can monitor the battery power and health status in real time, avoiding damage caused by excessive charging and discharging. The convenient signal detection equipment based on FPGA disclosed in the present application greatly reduces the size of the equipment through the highly integrated design of the integrated conformal antenna 2, improving the portability. The efficient cooperation of the signal demodulation module 3 and the FPGA module 4 enables the equipment to process multiple types of signals simultaneously, improving the accuracy and speed of signal detection. The addition of the communication module 5 and the storage module 6 further enhances the practicality and flexibility of the equipment. Overall, the device maintains a small and portable size while having powerful signal processing capabilities and a wide range of application scenarios, suitable for various complex environmental conditions. The above are preferred embodiments of the present application, but do not limit the protection scope of the present application, therefore: any equivalent changes made in accordance with the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A portable signal detection device based on FPGA, characterized in that, The utility model relates to a kind of integrated conformal antenna and signal processing system, including: Shell (1), Integrated conformal antenna (2) is installed on the top of shell (1), for receiving and transmitting signal, including receiving FM / AM broadcast signal, DTMB terrestrial digital television signal and CMMB mobile multimedia broadcast signal, and receiving and transmitting communication signal; And installed in the inside of shell (1): Signal demodulation module (3) is used for receiving and demodulating multiple types of signals; FPGA module (4) is used for analyzing and processing the received multiple types of signals; Communication module (5) is used for transmitting detection data and alarm information to the monitoring center server, and responding to configuration information; Storage module (6) is used for storing received audio and video signals; Power supply module (7) is used for supplying power to integrated conformal antenna (2) and each module in the inside of shell (1); The signal demodulation module (3), communication module (5), storage module (6) and power supply module (7) are connected with the FPGA module (4).

2. The FPGA-based portable signal detection device of claim 1, wherein, The front of the shell (1) is provided with a touch display screen module (8), which is connected with the FPGA module (4) and used for displaying detection results and previewing audio and video signals.

3. The FPGA-based portable signal detection device of claim 2, wherein, It also includes an audio output module (9) connected with the FPGA module (4), and the audio output module (9) is used for playing audio.

4. The FPGA-based portable signal detection device of claim 3, wherein, The integrated conformal antenna (2) includes a receiving antenna and a transmitting antenna, the receiving antenna includes an FM / AM broadcast signal receiving antenna (21), a DTMB terrestrial digital television signal receiving antenna (22) and a CMMB mobile multimedia broadcast signal receiving antenna (23), and the transmitting antenna includes a 4G / 5G communication antenna (24), a WIFI communication antenna (25) and a Beidou communication antenna (26).

5. The FPGA-based portable signal detection device of claim 4, wherein, The FM / AM broadcast signal receiving antenna (21) receives signals with a frequency of 76-108 MHz (FM) and 520-1720 kHz (AM).

6. The FPGA-based portable signal detection device of claim 4, wherein, The DTMB terrestrial digital television signal receiving antenna (22) and the CMMB mobile multimedia broadcast signal receiving antenna (23) support single-carrier or multi-carrier signal input, and receive signals with a frequency of 470-798 MHz.

7. The FPGA-based portable signal detection device of claim 3, wherein, The FPGA module (4) analyzes and processes the received multiple types of signals, including physical layer, code stream layer and audio and video layer detection of the received multiple types of signals. The physical layer detection of the received multiple types of signals includes monitoring of signal strength, signal quality, signal-to-noise ratio, bit error rate and lock state. The code stream layer detection of the received multiple types of signals includes real-time monitoring, analysis and alarm of the code stream layer, and providing index statistics of code stream structure, code rate, empty packet rate, effective bandwidth and PID bandwidth. The audio and video layer detection of the received multiple types of signals includes real-time decoding of the video and audio of the selected program, displaying the video and audio through the touch display screen module (8), and playing the audio through the audio output module (9).

8. The FPGA-based portable signal detection device of claim 3, wherein, The FPGA module (4) analyzes and processes the received multi-type signals, which also includes scanning the frequency range of 76MHz-108MHz and 520KHz-1720KHz, recording the effective frequency points and program list, and sorting the frequency points according to the signal strength and signal-to-noise ratio.

9. The FPGA-based portable signal detection device of claim 3, wherein, The FPGA module (4) analyzes and processes the received multi-type signals, which also includes transcoding the received video signals and audio signals.

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