CN215912118U - Automatic test system of integral type thing networking perception equipment - Google Patents
Automatic test system of integral type thing networking perception equipment Download PDFInfo
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Abstract
The utility model relates to the technical field of sensing equipment of the Internet of things, and particularly discloses an automatic test system of integrated sensing equipment of the Internet of things, which comprises: the system comprises an embedded main control module, a baseband processing module, a radio frequency channel module, a radio frequency front end module and an antenna module, wherein the embedded main control module, the baseband processing module, the radio frequency channel module, the radio frequency front end module and the antenna module are connected in sequence; the integrated automatic testing system for the sensing equipment of the Internet of things provided by the utility model has an efficient transmission mechanism, supports resource recombination and function reconstruction, has a service interface and a general control interface, has multi-channel processing capability and solves the problems that the existing testing of the sensing equipment of the Internet of things needs a plurality of table type instrument combinations, the system structure is complex and the testing automation degree is low by adopting key technologies such as modular hardware, an open high-speed bus, digital signal processing and the like.
Description
Technical Field
The utility model relates to the technical field of sensing equipment of the Internet of things, in particular to an automatic test system of the sensing equipment of the Internet of things.
Background
The sensing equipment of the internet of things comprises various types of communication equipment such as a terminal sensing chip of the internet of things, a miniaturized intelligent sensor, an RFID intelligent module, a high-precision positioning module, a multifunctional data acquisition terminal of the internet of things, an intelligent sensing terminal of the internet of things and the like, and integrates various wireless communication technologies and embedded technologies. At present, communication test instruments such as a radio frequency signal generator, a radio frequency signal analyzer and a vector network analyzer are mainly adopted for testing the internet of things sensing equipment, various desk-top instrument combinations are needed during testing, the system structure is complex, the testing automation degree is low, the problem of incomplete testing or inaccurate measurement is easily caused, and therefore the automatic testing system for the internet of things sensing equipment with high integration level and high automation degree is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides an integrated Internet of things sensing equipment automatic test system, which solves the problems that the existing Internet of things sensing equipment test needs a plurality of table type instrument combinations, the system structure is complex and the test automation degree is low.
As a first aspect of the present invention, an integrated internet of things sensing equipment automatic test system is provided, including: the system comprises an embedded main control module, a baseband processing module, a radio frequency channel module, a radio frequency front end module and an antenna module, wherein the embedded main control module, the baseband processing module, the radio frequency channel module, the radio frequency front end module and the antenna module are connected in sequence;
the embedded main control module is used for setting radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front-end module and the antenna module when the integrated internet of things perception equipment automatic test system transmits communication signals;
the baseband processing module is configured to generate a first digital signal according to the radio frequency parameter and the protocol parameter, convert the first digital signal into a first analog signal, and transmit the first analog signal to the radio frequency channel module;
the radio frequency channel module is used for performing frequency mixing and filtering processing on the first analog signal and then transmitting the first analog signal to the radio frequency front-end module;
the radio frequency front-end module is used for amplifying the processed first analog signal and transmitting the amplified first analog signal to the antenna module;
the antenna module is used for transmitting the amplified first analog signal; or
The embedded main control module is used for setting radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front-end module and the antenna module when the integrated internet of things perception equipment automatic test system receives communication signals;
the antenna module is used for receiving a second analog signal from the outside and transmitting the second analog signal to the radio frequency front end module;
the radio frequency front end module is used for amplifying the second analog signal and transmitting the amplified second analog signal to the radio frequency channel module;
the radio frequency channel module is used for performing frequency mixing and filtering processing on the amplified second analog signal and then transmitting the amplified second analog signal to the baseband processing module;
the baseband processing module is configured to convert the processed second analog signal into a second digital signal, and perform an analysis test on the second digital signal under the control of the embedded main control module.
Further, the embedded main control module comprises an embedded processor.
Further, the baseband processing module comprises a digital signal processor and an FPGA processor.
Further, the radio frequency channel module comprises a radio frequency switch, a mixer, a filter, a phase-locked loop and a voltage-controlled crystal oscillator.
Further, the radio frequency front end module includes a transmitting end signal conditioning circuit, a receiving end signal conditioning circuit and an antenna selection circuit, wherein the transmitting end signal conditioning circuit includes a final power amplifier, the receiving end signal conditioning circuit includes a low noise preamplifier and a filter, and the antenna selection circuit includes a radio frequency switch.
Further, the antenna module comprises a plurality of communication antennas and a time service antenna.
The automatic test system for the integrated Internet of things sensing equipment provided by the utility model has the following advantages: by adopting key technologies such as modular hardware, open high-speed buses and digital signal processing, the system has an efficient transmission mechanism, supports recombination and function reconstruction of resources, has a service interface and a general control interface, has multi-channel processing capacity, and solves the problems that the existing sensing equipment of the Internet of things needs combination of various desk-top instruments, the system structure is complex and the test automation degree is low.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.
Fig. 1 is a schematic structural diagram of an integrated internet of things sensing equipment automatic test system provided by the utility model.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the predetermined purpose of the utility model, the following detailed description will be given to the embodiments, structures, features and effects of the integrated internet of things sensing equipment automatic testing system according to the present invention with reference to the accompanying drawings and preferred embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the utility model herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the explanation of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly unless otherwise specified. For example, the connection may be a fixed connection, a connection through a special interface, or an indirect connection via an intermediate medium. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In this embodiment, an integrated automatic testing system for internet of things sensing equipment is provided, fig. 1 is a schematic structural diagram of the integrated automatic testing system for internet of things sensing equipment provided by the present invention, and as shown in fig. 1, the integrated automatic testing system for internet of things sensing equipment includes: the system comprises an embedded main control module, a baseband processing module, a radio frequency channel module, a radio frequency front end module and an antenna module, wherein the embedded main control module, the baseband processing module, the radio frequency channel module, the radio frequency front end module and the antenna module are connected in sequence;
the embedded main control module is used for setting radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front-end module and the antenna module when the integrated internet of things perception equipment automatic test system transmits communication signals;
the baseband processing module is configured to generate a first digital signal according to the radio frequency parameter and the protocol parameter, convert the first digital signal into a first analog signal, and transmit the first analog signal to the radio frequency channel module;
the radio frequency channel module is used for performing frequency mixing and filtering processing on the first analog signal and then transmitting the first analog signal to the radio frequency front-end module;
the radio frequency front-end module is used for amplifying the processed first analog signal and transmitting the amplified first analog signal to the antenna module;
the antenna module is used for transmitting the amplified first analog signal; or
The embedded main control module is used for setting radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front-end module and the antenna module when the integrated internet of things perception equipment automatic test system receives communication signals;
the antenna module is used for receiving a second analog signal from the outside and transmitting the second analog signal to the radio frequency front end module;
the radio frequency front end module is used for amplifying the second analog signal and transmitting the amplified second analog signal to the radio frequency channel module;
the radio frequency channel module is used for performing frequency mixing and filtering processing on the amplified second analog signal and then transmitting the amplified second analog signal to the baseband processing module;
the baseband processing module is configured to convert the processed second analog signal into a second digital signal, and perform an analysis test on the second digital signal under the control of the embedded main control module.
Preferably, the embedded main control module comprises an embedded processor. The embedded main control module adopts a high-performance and compact embedded processor, can control the baseband and the radio frequency module to realize the Internet of things sensing communication with wide frequency range, high data throughput and high performance, can transmit and receive various communication signals, internally realizes the functions of resource allocation, reconstruction backup, loading and unloading and data storage of the test system, and externally realizes the control management and state monitoring of the test system.
Preferably, the baseband processing module comprises a digital signal processor and an FPGA processor. The digital signal processor mainly realizes digital modulation and demodulation of signals and bidirectional conversion between analog signals and digital signals, and is specifically divided into a transmitting end digital signal processor and a receiving end digital signal processor according to different transmitting or receiving directions of the signals, wherein the transmitting end digital signal processor is used for receiving the signals from the FPGA processor to perform digital signal processing and sending the signals to the radio frequency channel module, and the receiving end digital signal processor is used for receiving the signals from the radio frequency channel module to perform digital signal processing and sending the signals to the FPGA processor. The FPGA processor mainly realizes digital signal processing, signal transceiving control, protocol processing and data communication between the embedded main control module and a peripheral circuit, wherein the digital signal processing mainly comprises waveform loading, baseband interpolation, baseband extraction, digital up-conversion, digital down-conversion and digital correction, the signal transceiving control mainly comprises transceiving state conversion, transceiving conversion time sequence control, communication timeout and interrupt control, and the protocol processing mainly comprises signaling generation, signaling analysis, coding and decoding, framing and deframing, protocol state conversion and the like.
Specifically, the transmitting end digital signal processor adopts double-channel synchronous digital-to-analog conversion, respectively receives I-path and Q-path digital signals output by the FPGA, converts the signals into analog signals, passes through a low-pass filter with the cut-off frequency of 80MHz, and then sends the analog signals to the quadrature modulator to modulate to the required frequency. The quadrature modulator adopts a zero intermediate frequency structure, receives a local oscillator signal from a transmitting end radio frequency channel module, converts the local oscillator signal into two paths of quadrature local oscillator signals with a phase difference of 90 degrees, and is respectively used for modulating the I path digital signals and the Q path digital signals.
Specifically, the receiving end digital signal processor is similar to the transmitting end digital signal processor, adopts a zero intermediate frequency structure, receives a local oscillator signal from a receiving end radio frequency channel module, converts the local oscillator signal into two paths of orthogonal local oscillator signals with a phase difference of 90 degrees, and respectively demodulates the analog signals, and the two paths of demodulated analog signals pass through a low-pass filter with a cut-off frequency of 80MHz and then are sent into two channels of synchronous analog-to-digital conversion to respectively obtain an I path digital signal and a Q path digital signal and output the signals to the FPGA.
It should be noted that, based on consideration of optimization of radio frequency performance indexes, a digital signal interface between a digital signal processor and an FPGA processor is designed to have a configurable intermediate frequency of 0 Hz-80 MHz, and a final digital baseband signal is obtained by matching with digital up-conversion and digital down-conversion algorithms inside the FPGA processor, so as to solve the problems of amplitude and phase imbalance of quadrature modulation signals and quadrature local oscillation signals caused by a zero intermediate frequency structure, and useless sideband and local oscillation leakage caused by sensitivity to direct current offset.
In this embodiment, PCIe is mainly used for communication between the baseband processing module and the embedded main control module as a high-speed data bus and a real-time control bus, and the FPGA processor receives a command and data from the embedded main control module from the PCIe bus in a DMA FIFO form, and sends a response of a communication result and the data to the embedded main control module through the PCIe bus in the DMA FIFO form. The communication between the baseband processing module and the peripheral circuit mainly adopts AUX I/O, including 12 paths of bidirectional high-speed digital I/O channels and one path of PPS bidirectional trigger channel.
Preferably, the radio frequency channel module includes a radio frequency switch, a mixer, a filter, a phase-locked loop, and a voltage-controlled crystal oscillator. The radio frequency channel module is divided into a transmitting end radio frequency channel module and a receiving end radio frequency channel module from the function combination, wherein the transmitting end radio frequency channel module is used for receiving signals from the baseband processing module, carrying out channel selection, frequency mixing and filtering processing, and sending the signals to the radio frequency front end module, and the receiving end radio frequency channel module is used for receiving radio frequency signals from the radio frequency front end module, carrying out channel selection, frequency mixing and filtering processing, and sending the signals to the baseband processing module.
Specifically, in both the transmitting end radio frequency channel module and the receiving end radio frequency channel module, a phase-locked loop and a voltage-controlled crystal oscillator are additionally designed, and are used for receiving a reference clock from the radio frequency front end module, generating a local oscillation signal according to a frequency required by configuration, and outputting the local oscillation signal to a transmitting end digital signal processor and a receiving end digital signal processor in the baseband processing module.
It should be noted that, in the radio frequency channel module, the radio frequency transmission channels are specifically divided into a through channel suitable for a frequency range of 500MHz to 6GHz and a mixing channel suitable for a frequency range of 10MHz to 500MHz, and the switching between the two radio frequency channels is controlled by two sets of linked radio frequency switches.
It should be noted that, based on consideration of optimizing radio frequency performance indexes, analog signals output by the baseband processing module after quadrature modulation only cover a frequency range of 500MHz to 6GHz, when the use frequency of the test system is within the range, a through channel can be selected to output to the radio frequency front end module, and when the use frequency of the test system is lower than the range, a mixer circuit can be selected to perform secondary mixing to obtain a required frequency.
It should be noted that the frequency mixing channel adopts a superheterodyne structure, in the frequency mixing process, a phase-locked loop and a voltage-controlled crystal oscillator receive a reference clock from a radio frequency front-end module, and generate a local oscillation signal according to a frequency required by configuration to supply to a frequency mixing circuit, and a matched filter circuit is further designed before and after the frequency mixing circuit to solve the problem of image frequency caused by frequency mixing.
Specifically, the receiving end radio frequency channel module is similar to the transmitting end radio frequency channel module, except that when a radio frequency signal with a frequency range of 10 MHz-500 MHz enters the mixing channel, the output frequency is normalized to a frequency band with 2.44GHz as a center frequency according to configuration, and is output after passing through a band-pass filter with a passband width of 84MHz, and a driving amplifier is designed after a through channel and the mixing channel are converged for improving signal loss brought by a radio frequency receiving channel and conditioning the power of the received radio frequency signal to an order of magnitude suitable for the baseband processing module.
Preferably, the radio frequency front end module includes a transmitting end signal conditioning circuit, a receiving end signal conditioning circuit and an antenna selection circuit. The transmitting end signal conditioning circuit comprises a final power amplifier used for enhancing a communication signal to be transmitted; the receiving end signal conditioning circuit comprises a low-noise preamplifier and a filter and is used for conditioning the received weak communication signals; the antenna selection circuit comprises three groups of linked radio frequency switches for configuring the signal transceiving modes of two ports of TX1/RX1 and RX 2.
Specifically, the radio frequency front end module further includes a clock selection circuit, the clock selection circuit is mainly composed of a local crystal oscillator, a GPS disciplined clock and a three-selection switch, and is used for selecting an external clock from a clock port, an internal clock from the local crystal oscillator, or the GPS disciplined clock from a time service antenna as a reference clock source shared by the radio frequency front end module, the radio frequency channel module and the baseband processing module.
In this embodiment, the rf front-end module includes two sets of rf front-end circuits, and the communication ports of each set of rf front-end circuits include two ports TX1/RX1 and RX2, and a single communication antenna may be connected in a transceiver-integrated mode by using the TX1/RX1 ports to transmit and receive signals, or two communication antennas may be connected in a transceiver-separated mode by using the TX1/RX1 ports to transmit signals only and receive signals only by using the RX2 ports.
Specifically, the ports of the radio frequency front-end module mainly include a communication port, a reference clock port and a time service port, wherein the communication port is used for connecting a communication antenna, the reference clock port is used for connecting an external reference clock source, and the time service port is used for connecting the time service antenna.
Preferably, the antenna module comprises a plurality of communication antennas and a time service antenna. The system comprises a plurality of communication antennas, a time service antenna, a plurality of antenna modules and a plurality of antenna modules, wherein the plurality of communication antennas are respectively suitable for transmitting and receiving communication signals of different frequency bands, one time service antenna is used for receiving time service signals, and each antenna is respectively suitable for different application scenes in a mode of combining an internal small-size antenna and an external antenna; in an application scenario that requirements on a working frequency band and a communication distance of a test system are not high, but requirements on portability are high, a built-in small-size antenna can be selected and used; in an application scenario where the requirements on the working frequency band and the communication distance of the test system are high but no portability requirement exists, various external antennas can be selectively connected and respectively correspond to various different working frequency bands.
Specifically, the built-in antenna of the antenna module adopts a small-size rod antenna, has the characteristic of wide-band omnidirectional radiation, is small, exquisite and portable, and has strong flexibility, the antenna is connected to one of the communication ports of the test system, the external antenna is different according to the corresponding frequency band, and comprises a biconical antenna or a loop antenna which is suitable for the high-frequency band, and a log-periodic antenna which is suitable for the ultrahigh-frequency band, wherein the low-end frequency of the biconical antenna or the loop antenna can reach 30MHz, the lower limit of the working frequency band of the test system is met, the log-periodic antenna is printed by adopting a circuit board, a plurality of groups of dipole oscillators are built in the log-periodic antenna, the log-periodic antenna can be suitable for a very wide frequency range, and has good directivity, and the antenna is connected to the other communication ports of the test system.
The working principle of the automatic test system for the integrated Internet of things sensing equipment provided by the utility model is as follows:
(1) when the system transmits communication signals, firstly, the embedded main control module sets the radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front-end module and the antenna module according to requirements, then the baseband processing module generates digital signals according to the parameters and converts the digital signals into analog signals, then the analog signals are transmitted to the radio frequency channel module, then the radio frequency channel module performs frequency mixing, filtering and other processing on the analog signals and transmits the analog signals to the radio frequency front-end module, and then the radio frequency front-end module amplifies the signals and transmits the amplified signals to a selected antenna in the antenna module for transmission.
(2) When the system receives communication signals, firstly, the embedded main control module sets the radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front end module and the antenna module according to requirements, then the selected antenna in the antenna module receives the communication signals from the outside and transmits the communication signals to the radio frequency front end module, then the radio frequency front end module amplifies the communication signals and transmits the amplified communication signals to the radio frequency channel module, then the radio frequency channel module performs frequency mixing, filtering and other processing on the amplified communication signals and transmits the amplified communication signals to the baseband processing module, then the baseband processing module converts analog signals into digital signals, and the digital signals are analyzed and tested under the control of the embedded main control module.
It should be noted that, in the novel technology in the field of automated test and measurement, the key technologies suitable for the system design mainly include modular hardware, open high-speed bus, digital signal processing, and the like. The modularized hardware technology can meet various specific application requirements by selecting appropriate hardware modules and customizing communication programs, and an automatic test system constructed by adopting the modularized hardware has higher integration level, data throughput and flexibility expandability than the traditional test system. The open high-speed bus technology can improve the maximum data transmission rate to the GB/s level by selecting a proper high-speed data bus, greatly improves the bus bandwidth compared with the traditional test system, and can add functions such as a backboard synchronous clock, a trigger line and the like. The digital signal processing technology finishes the signal analysis processing function through an FPGA and a CPU, wherein the FPGA has configurable triggering, timing and onboard decision and supports loading and running of various communication waveforms, various complex digital signal processing and logic control algorithms can be executed on the FPGA in real time, and the CPU has strong support characteristics for various general functions and is suitable for internally realizing the functions of resource configuration, reconstruction backup and loading and unloading of a test system and externally realizing the control management and state monitoring of the test system.
The integrated automatic testing system for the sensing equipment of the internet of things, provided by the utility model, is based on a modularized system framework of an open high-speed bus, has real-time signal processing capability, can realize the sensing communication of the internet of things with wide frequency range, high data throughput and high performance, can transmit and receive various communication signals, and supports the sensing communication protocol of the internet of things in international standard and national standard.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. The utility model provides an automatic test system is equipped in perception of integral type thing networking which characterized in that includes: the system comprises an embedded main control module, a baseband processing module, a radio frequency channel module, a radio frequency front end module and an antenna module, wherein the embedded main control module, the baseband processing module, the radio frequency channel module, the radio frequency front end module and the antenna module are connected in sequence;
the embedded main control module is used for setting radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front-end module and the antenna module when the integrated internet of things perception equipment automatic test system transmits communication signals;
the baseband processing module is configured to generate a first digital signal according to the radio frequency parameter and the protocol parameter, convert the first digital signal into a first analog signal, and transmit the first analog signal to the radio frequency channel module;
the radio frequency channel module is used for performing frequency mixing and filtering processing on the first analog signal and then transmitting the first analog signal to the radio frequency front-end module;
the radio frequency front-end module is used for amplifying the processed first analog signal and transmitting the amplified first analog signal to the antenna module;
the antenna module is used for transmitting the amplified first analog signal; or
The embedded main control module is used for setting radio frequency parameters and protocol parameters of the baseband processing module, the radio frequency channel module, the radio frequency front-end module and the antenna module when the integrated internet of things perception equipment automatic test system receives communication signals;
the antenna module is used for receiving a second analog signal from the outside and transmitting the second analog signal to the radio frequency front end module;
the radio frequency front end module is used for amplifying the second analog signal and transmitting the amplified second analog signal to the radio frequency channel module;
the radio frequency channel module is used for performing frequency mixing and filtering processing on the amplified second analog signal and then transmitting the amplified second analog signal to the baseband processing module;
the baseband processing module is configured to convert the processed second analog signal into a second digital signal, and perform an analysis test on the second digital signal under the control of the embedded main control module.
2. The integrated IOT sensing equipment automatic test system of claim 1, wherein the embedded master control module includes an embedded processor.
3. The integrated IOT sensing equipment automatic test system of claim 1, wherein the baseband processing module comprises a digital signal processor and an FPGA processor.
4. The integrated IOT sensing equipment automatic test system of claim 1, wherein the RF channel module comprises an RF switch, a mixer, a filter, a phase-locked loop and a voltage controlled crystal oscillator.
5. The integrated IOT sensing equipment automatic test system of claim 1, wherein the RF front-end module comprises a transmitting end signal conditioning circuit, a receiving end signal conditioning circuit and an antenna selection circuit, wherein the transmitting end signal conditioning circuit comprises a final power amplifier, the receiving end signal conditioning circuit comprises a low noise preamplifier and a filter, and the antenna selection circuit comprises an RF switch.
6. The integrated internet of things perception equipment automatic test system as claimed in claim 1, wherein the antenna module includes a plurality of communication antennas and a time service antenna.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115333552A (en) * | 2022-08-09 | 2022-11-11 | 中新国际联合研究院 | Perception communication integration method based on wireless communication and radio frequency perception |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115333552A (en) * | 2022-08-09 | 2022-11-11 | 中新国际联合研究院 | Perception communication integration method based on wireless communication and radio frequency perception |
| CN115333552B (en) * | 2022-08-09 | 2023-12-05 | 中新国际联合研究院 | Sensing communication integration method based on wireless communication and radio frequency sensing |
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