CN202150857U

CN202150857U - Radio station detection module

Info

Publication number: CN202150857U
Application number: CN201120135927U
Authority: CN
Inventors: 牛刚; 陈国顺; 冯锡智; 王格芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-03
Filing date: 2011-05-03
Publication date: 2012-02-22
Anticipated expiration: 2021-05-03

Abstract

The utility model discloses a radio station detection module, comprising a power supply module, an audio source module, a radio frequency source module, an analysis module, a radio frequency channel module and a core MCU module; wherein, the power supply module supplies power to the audio source module, the radio frequency source module and the analysis module, and the audio source module supplies an audio signal output to a detected device; the radio frequency source module supplies a radio frequency signal output to the radio frequency channel module, the analysis module analyzes an audio signal sent by the detected device and a radio frequency signal sent by the radio frequency channel module, and the core MCU module controls the audio source module to generate the audio signal, controls the radio frequency source module to generate the radio frequency signal, and controls the analysis module to analyze and calculate the received audio and radio frequency signals. The radio station detection module of the utility model employs a DSP digital processing circuit and an FPGA circuit to realize the analysis of the audio and radio frequency signals, enables radio station faults to be detected rapidly, is conducive to field detections and emergency repairs, and is small in volume and convenient in carrying by employing a large-scale integrated circuit.

Description

Radio station's detection module

Technical field

The utility model relates to a kind of checkout equipment, especially a kind of radio station detection module.

Background technology

Radio station is a kind of communication equipment that information-based battlefield can not lack, and utilizes its interconnection and interflow that can realize arms and services unit, is that army's fighting capacity obtains the key link of performance to greatest extent.Because radio station's technical sophistication, status are important, the probability that war undermines fault is very big, carry out on-the-spot detect and the task of repairing very urgent.At present, also be confined to all purpose instruments such as frequency meter, power meter, spectrum analysis or comprehensive test instrument, can not adapt to the needs that repair in the battlefield for the detection in radio station.Utilizing advanced testing radio technology, develop the detection module of portable practicality, improve the scene of radio station and detect and supportability, is the best weapon that improves army's fighting capacity.

The utility model content

The utility model technical issues that need to address provide a kind of portable radio station's detection module that is used for on-the-spot test and maintenance.

For addressing the above problem; The technical scheme that the utility model is taked is: a kind of radio station detection module; Comprise power module, audio-source module, radio frequency source module, analysis module, radio-frequency channel module and core MCU module; Wherein power module is delivered to audio-source module, radio frequency source module and analysis module with power supply; The audio-source module is with audio signal output to seized equipment; The radio frequency source module exports radiofrequency signal to the radio-frequency channel module, the seized equipment of input termination of analysis module and the radiofrequency signal output of radio-frequency channel module, core MCU module and audio-source module, radio frequency source module, analysis module and radio-frequency channel module two-way communication.

Above-mentioned analysis module comprises audio analysis module and radio frequency analysis module.

Said audio-source module comprises DDS module and variable programmable attenuator module, and the input that exports variable programmable attenuator module to of the signal that the DDS module produces produces audio signal through variable programmable attenuator module.

Said radio frequency source module comprises DDS module, low pass filter blocks and fixed ampllitude ring module, and the signal that the DDS module produces is delivered to fixed ampllitude ring module after low pass filter blocks filtering, fixed ampllitude ring module output radiofrequency signal.

Analysis module comprises DSP digital processing unit and FPGA programmable logic array; Wherein the DSP digital processing unit is accomplished the power calculation after audio signal analysis, the radiofrequency signal detection, the frequency offset calculation of radiofrequency signal, and the FPGA programmable logic array comprises frequency measurement module, high speed frequency measurement module and signal source modulation module.

Adopt the beneficial effect that technique scheme produced to be: the utility model adopts DSP digital processing circuit and FPGA circuit to realize the analysis of radiofrequency signal and audio signal; Fault that can fast detecting radio station; Help on-the-spot the detection and repairing; Adopt large scale integrated circuit, make its advantages of small volume, be easy to carry.

Description of drawings

Fig. 1 is the theory diagram of the utility model;

Fig. 2 is the user mode connection layout of the utility model;

Fig. 3 is the power module of the utility model and the composition frame chart of audio-source module;

Fig. 4 is radio frequency source module and the audio frequency of the utility model, the composition frame chart of radio frequency analysis module;

Fig. 5 is the composition frame chart of the radio-frequency channel module of the utility model;

Fig. 6 is the schematic diagram of the audio producing circuit of the utility model;

Fig. 7 is the schematic diagram that the radio frequency of the utility model produces circuit;

Fig. 8 is the schematic diagram of the DSP circuit of the utility model;

Fig. 9 is the schematic diagram of the radio-frequency channel circuit of the utility model;

Figure 10 is the core MCU of the utility model and the schematic diagram of power circuit;

Figure 11 is the FPGA of the utility model and the schematic diagram of control circuit thereof.

Embodiment

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:

As shown in Figure 1; A kind of radio station of the utility model detection module; Comprise power module, audio-source module, radio frequency source module, analysis module, radio-frequency channel module and core MCU module; Wherein power module is delivered to audio-source module, radio frequency source module and analysis module with power supply, and the audio-source module is with audio signal output to seized equipment, and the radio frequency source module exports radiofrequency signal to the radio-frequency channel module; The seized equipment of input termination of analysis module and the radiofrequency signal output of radio-frequency channel module, core MCU module and audio-source module, radio frequency source module, analysis module and radio-frequency channel module two-way communication.Wherein analysis module comprises audio analysis module and radio frequency analysis module.

When the utility model is used, need be connected seized equipment with voice-frequency cable through radio frequency cable, the utility model is connected as shown in Figure 2 with the radio station test.

Wherein, radio frequency cable 1 is the cable of Sub-miniature B (radio frequency mouth) to radio frequency N type interface, and radio frequency cable 2 is the cable of radio frequency bnc interface to tested radio station radio frequency mouth; The power bearing ability of 20dB attenuator is confirmed according to tested radio station power.The maximum power that is input to radio station's detection module Sub-miniature B through attenuator is no more than 0.5W.The audio-frequency test cable connects the seven core COBBAIFs of radio station's detection module and the audio port in tested radio station.

Power module of the utility model and audio-source module are as shown in Figure 3, and the audio-source module produces audio output signal, and audio input signal is carried out impedance conversion and driving; Power module produces the required 7.2V of system, 3.3V, ± the 5V power supply.

As shown in Figure 3, the utility model is provided with 1. 7 core COBBAIFs, and interface signal has audio signal output Aout, audio signal input Ain, control signalling PTT; 2. rs 232 serial interface signal A, B that EBI, interface signal have RS485 to produce, the 7.2V that voltage stabilizing circuit produces, 3.3V, ± 5V, through the Ain of impedance conversion and driving; 3. backplane interface has the shared 24V of several sub-module, serial ports transmitting-receiving RXD, TXD, earth signal etc.

Wherein audio output signal Aout is produced by DDS module (Direct Digital Synthesizer) and variable programmable attenuator module (DAC); Circuit theory diagrams are with reference to figure 6.

Audio input signal derives from the radio station, through twice amplifier (AMP) and a LPF (LPF), accomplishes impedance conversion and driving, and Ain gets into radio frequency source audio analysis module through EBI; Single-chip microcomputer (MCU) control PTT signal carries out the radio station transmitting-receiving; And serial ports RS485 signal carries out intermodule communication, and voltage stabilizing circuit is through the 24V direct current, supply with 7.2V, 3.3V, ± the 5V direct voltage.

The radio frequency source module and the audio analysis module of the utility model are as shown in Figure 4, and the audio-source module is used to produce the radiofrequency signal of 1.5MHz～120MHz, fixed ampllitude ring amplitude control range 0dBm～-6dBm.The audio analysis module realizes 100Hz～10kHz, the frequency of the audio signal of 0V～10V, voltage and letter Nader's measurement.

As shown in Figure 4, the utility model is provided with like lower interface:

A) radio frequency output RFout;

B) rf attenuation passage control cont;

C) radio frequency analysis channel control cont;

D) radio frequency input RFp, RFd, RFf;

E) EBI, rs 232 serial interface signal A, B, 7.2V, 3.3V, ± 5V, Ain;

The generation of radiofrequency signal uses DDS to realize, produces radiofrequency signal RFout through LPF low pass filter and fixed ampllitude ring, and the fixed ampllitude ring is realized through the control variable gain amplifier; Circuit is as shown in Figure 7.

The shaping of rf frequency meter uses the comparator of DDS to realize.FPGA medium frequency measuring circuit realizes rf frequency meter function; The high speed frequency measurement circuit is accomplished the frequency hopping test function; The signal source modulation circuit refreshes the DDS frequency word at a high speed and accomplishes the radiofrequency signal modulation; Function control and the information interaction of FPGA are realized by MCU; The control of radio frequency analysis channel and decay passage is realized by single-chip microprocessor MCU; The circuit of FPGA is with reference to Figure 11, and the MCU circuit is with reference to Figure 10.DSP realizes the power calculation after audio signal analysis, the radiofrequency signal detection, the frequency offset calculation of radiofrequency signal; The DSP circuit is with reference to figure 8.MUX realizes the gating through RFf, RFd, RFp signal and the audio input signal Ain signal of radio frequency analysis channel interface; ADC accomplishes the high-speed digital-analog conversion;

The radio-frequency channel module of the utility model is as shown in Figure 5, be used to realize radio-frequency signal source output-40dB～-the 100dB control that decays; Realize the control of frequency meter passage, frequency deviation measurement passage (mixing and frequency deviation demodulation) control, radio-frequency power detection function that radio frequency is analyzed.

As shown in Figure 5, the utility model is provided with interface:

A) radio frequency duplex interface: be connected to outside 20dB high power attenuator;

B) rf attenuation passage control interface;

C) radio frequency analysis channel control interface.

The decay of radio-frequency signal source control uses digital program controlled attenuator to realize in the utility model.RFout is through automatic gain control AGC, and programmable attenuator realization decay control, after 6dB power splitter and 10dB power attenuator export the output that Sub-miniature B is accomplished radiofrequency signal to.

The radio station radio-frequency input signals gets into frequency meter passage, power meter passage and frequency deviation channel circuit respectively through 10dB power attenuator and 6dB power splitter, produces signal RFf, RFp and RFd respectively; Frequency meter passage and power meter passage use simulation control variable gain amplifier to realize; The frequency deviation passage adopts active mixer and shaping pulse frequency deviation demodulator circuit to realize.Its circuit theory diagrams are with reference to figure 9.

Claims

1. radio station's detection module; It is characterized in that: comprise power module, audio-source module, radio frequency source module, analysis module, radio-frequency channel module and core MCU module; Wherein power module is delivered to audio-source module, radio frequency source module and analysis module with power supply; The audio-source module is with audio signal output to seized equipment; The radio frequency source module exports radiofrequency signal to the radio-frequency channel module, the seized equipment of input termination of analysis module and the radiofrequency signal output of radio-frequency channel module, core MCU module and audio-source module, radio frequency source module, analysis module and radio-frequency channel module two-way communication.

2. radio station according to claim 1 detection module is characterized in that said analysis module comprises audio analysis module and radio frequency analysis module.

3. radio station according to claim 1 detection module; It is characterized in that said audio-source module comprises DDS module and variable programmable attenuator module; The input that exports variable programmable attenuator module to of the signal that the DDS module produces produces audio signal through variable programmable attenuator module.

4. radio station according to claim 1 detection module; It is characterized in that said radio frequency source module comprises DDS module, low pass filter blocks and fixed ampllitude ring module; The signal that the DDS module produces is delivered to fixed ampllitude ring module after low pass filter blocks filtering, fixed ampllitude ring module output radiofrequency signal.

5. radio station according to claim 1 and 2 detection module; It is characterized in that said analysis module comprises DSP digital processing unit and FPGA programmable logic array; Wherein the DSP digital processing unit is accomplished the power calculation after audio signal analysis, the radiofrequency signal detection, the frequency offset calculation of radiofrequency signal, and the FPGA programmable logic array comprises frequency measurement module, high speed frequency measurement module and signal source modulation module.