CN111934699B - ADS-B data acquisition device and system - Google Patents
ADS-B data acquisition device and system Download PDFInfo
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- CN111934699B CN111934699B CN202010751932.5A CN202010751932A CN111934699B CN 111934699 B CN111934699 B CN 111934699B CN 202010751932 A CN202010751932 A CN 202010751932A CN 111934699 B CN111934699 B CN 111934699B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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Abstract
The invention discloses an ADS-B data acquisition device and a system, wherein the device comprises a first receiving antenna, a first radio frequency receiving module, an intermediate frequency receiving module, an encoding data processing module and a filtering compensation control module, and the encoding data processing module is connected with the intermediate frequency receiving module so as to carry out ADC signal sampling, decoding and data processing on intermediate frequency signals output by the intermediate frequency receiving module; and the filtering compensation control module and the coded data processing module are used for accessing the intermediate frequency receiving module through the filtering compensation control module when the coded data processing module decodes the sampling signal for a plurality of times and generates error codes, and carrying out filtering compensation adjustment on the intermediate frequency receiving module. Therefore, the filtering compensation control module is incorporated into the capacitor and/or the resistor, and the frequency point of the intermediate frequency receiving module is adjusted to recover the frequency offset generated by the aging of the resistor or the capacitor of the receiver or the phenomenon that data cannot be normally received due to frequency variation caused by the flying of the airplane and the like.
Description
Technical Field
The invention relates to the technical field of ADS-B communication, in particular to an ADS-B data acquisition device and system.
Background
An ADS-B (Automatic Dependent-Broadcast-based Automatic Dependent monitoring) system is an information system integrating communication and monitoring, and comprises an information source, an information transmission channel and an information processing and displaying part. The main information of ADS-B is 4-dimensional position information (longitude, latitude, altitude and time) of the aircraft and other possible additional information (collision warning information, pilot input information, track angle, airline inflection point, etc.) as well as identification information and category information of the aircraft. In addition, other additional information may be included, such as heading, airspeed, wind speed, wind direction, and aircraft ambient temperature.
ADS-B is divided into two categories: transmit (OUT) and receive (IN). OUT is the basic function of ADS-B, which is responsible for transmitting signals from an aircraft sender to a ground receiving station or other aircraft via line-of-sight propagation. The ADS-B IN means that the aircraft receives ADS-B OUT information sent by other aircraft or information sent by ground service equipment, and provides operation support and situational awareness for the unit, such as collision warning information, collision avoidance strategies and meteorological information. When the receiver is used for a long time, the capacitance or the resistance on the receiver can generate an aging phenomenon, and the generated filtering frequency point of the filter is shifted, so that the receiving performance of the receiver is influenced. In addition, the flight of the aircraft also brings about frequency variation phenomenon, which further affects the data performance of the receiver.
In addition, because the receiver is usually set up through the receiving antenna and outdoor environment, when the receiver receives the effective signal, also receive the influence of the pulse interference signal relatively easily, make the received data wrong, even the false alarm condition. And the receiving antenna is usually arranged outdoors, so that the receiving antenna is easily influenced by lightning stroke pulse interference signals, even the lightning stroke pulse signals are introduced into the receiver, and a circuit in the receiver is burnt out, so that the receiver is abnormal and cannot work normally.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide an ADS-B data acquisition device and system.
On one hand, in order to achieve the above object, according to the ADS-B data collecting apparatus of the embodiment of the present invention, the ADS-B data collecting apparatus and system include:
a first receiving antenna;
the first radio frequency receiving module is in signal connection with the first receiving antenna;
the intermediate frequency receiving module is connected with the first radio frequency receiving module so as to amplify, filter and demodulate the intermediate frequency signal output by the first radio frequency receiving module after down conversion and output the intermediate frequency signal;
the coded data processing module is connected with the intermediate frequency receiving module so as to perform ADC signal sampling, decoding and data processing on the intermediate frequency signal output by the intermediate frequency receiving module;
and the filtering compensation control module is respectively connected with the coding data processing module and the intermediate frequency receiving module and is used for accessing the intermediate frequency receiving module through the filtering compensation control module when the coding data processing module decodes the sampling signal for multiple times and error codes appear, and carrying out filtering compensation adjustment on the intermediate frequency receiving module.
Further, according to an embodiment of the present invention, the ADS-B data collecting apparatus further includes a second receiving circuit, the second receiving circuit including:
a second receiving antenna;
the second radio frequency receiving module is connected with the second receiving antenna;
the interference pulse detection module is connected with the second radio frequency receiving module and is used for detecting interference pulses of intermediate frequency signals output by the second radio frequency receiving module after down-conversion;
the coding data processing module is also connected with the interference pulse detection module so as to carry out ADC signal sampling on the detection signal output by the interference pulse detection module and eliminate the decoding data packet of the first receiving loop when judging that the continuous interference pulse signal occurs in the second receiving loop.
Further, according to an embodiment of the present invention, the ADS-B data collecting device further includes a fast discharging control module, where the fast discharging control module is respectively connected to the output end of the first receiving antenna and the encoded data processing module, and is configured to communicate the fast discharging control module with the output end of the first receiving antenna when the encoded data processing module detects that the second receiving loop repeatedly generates the continuous interference pulse, so as to discharge lightning for the first receiving antenna.
Further, according to an embodiment of the present invention, the ADS-B data collecting apparatus further includes a limiting module, and the second receiving antenna is connected to the second radio frequency receiving module through the limiting module, so as to perform amplitude limitation on the second receiving antenna.
Further, according to an embodiment of the present invention, the fast discharge control module includes:
the control end of the first selector switch is connected with the coded data processing module, and the output end of the first selector switch is arranged between the first receiving antenna and the first radio frequency receiving module;
a voltage dependent resistor D1, one end of the voltage dependent resistor D1 is connected to the first channel of the first switch, and the other end of the voltage dependent resistor D1 is connected with the reference ground;
and one end of the capacitor C16 is connected to the first channel of the first switch, and the other end of the voltage dependent resistor C16 is connected to the reference ground.
Further, according to an embodiment of the present invention, the filter compensation control module includes:
the control end of the second selector switch is connected with the coded data processing module;
the input end of the first filter circuit is connected with the filter input end of the intermediate frequency receiving module, the output end of the first filter circuit is connected with the first channel of the second selector switch, and the output end of the second selector switch is connected with the filter output end of the intermediate frequency receiving module.
Further, according to an embodiment of the present invention, the filter compensation control module further includes:
the input end of the second filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the second filter circuit is connected with a second channel of the second selector switch;
the input end of the third filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the third filter circuit is connected with a third channel of the second selector switch;
the input end of the fourth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the fourth filter circuit is connected with a fourth channel of the second selector switch;
the input end of the fifth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the fifth filter circuit is connected with a fifth channel of the second selector switch;
the input end of the sixth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the sixth filter circuit is connected with a sixth channel of the second selector switch;
the input end of the seventh filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the seventh filter circuit is connected with a seventh channel of the second selector switch;
the input end of the eighth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the eighth filter circuit is connected with an eighth channel of the second selector switch;
the first filter circuit, the second filter circuit, the third filter circuit, the fourth filter circuit, the fifth filter circuit, the sixth filter circuit, the seventh filter circuit and the eighth filter circuit are respectively different filter values.
Further, according to an embodiment of the present invention, the first filter circuit includes:
one end of the capacitor C1 is connected to the filter input end of the intermediate frequency receiving module, and the other end of the capacitor C1 is connected to the first channel of the second switch;
one end of the resistor R1 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the resistor R1 is connected with the first channel of the second switch;
the second filter circuit includes:
one end of the capacitor C2 is connected to the filter input end of the intermediate frequency receiving module, and the other end of the capacitor C2 is connected to the second channel of the second switch;
one end of the resistor R2 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the resistor R2 is connected with the second channel of the second switch.
Further, according to an embodiment of the present invention, the glitch detection module includes:
and the logarithmic detector is connected with the input end of the logarithmic detector and the output end of the detection filter, and the output end of the logarithmic detector is connected with the coded data processing module.
On the other hand, the invention also provides an ADS-B data acquisition system, which comprises:
according to the ADS-B data acquisition device, the ADS-B data acquisition device further comprises a data transmission module, and the data transmission module is in communication connection with the coded data processing module;
and the ADS-B data storage and display module is in network connection with the data transmission module on the ADS-B data acquisition device.
The embodiment of the invention is connected with the intermediate frequency receiving module through the coding data processing module so as to carry out ADC signal sampling, decoding and data processing on the intermediate frequency signal output by the intermediate frequency receiving module; and the filtering compensation control module and the coded data processing module are used for accessing the intermediate frequency receiving module through the filtering compensation control module when the coded data processing module decodes the sampling signal for a plurality of times and generates error codes, and carrying out filtering compensation adjustment on the intermediate frequency receiving module. Therefore, the filtering compensation control module is incorporated into the capacitor and/or the resistor, and the frequency point of the intermediate frequency receiving module is adjusted to recover the frequency offset generated by the aging of the resistor or the capacitor of the receiver or the phenomenon that data cannot be normally received due to frequency variation caused by the flying of the airplane and the like.
In addition, the embodiment of the invention samples the input signal through the second receiving circuit, judges whether the lightning stroke signal occurs or not through the coding data processing module, and when the lightning stroke occurs, the coding data processing module is incorporated into the rapid discharging control module to release the lightning stroke pulse signal so as to avoid the abnormity of the receiver. Or when strong interference signals occur, the data packets of the received signals are removed, so that the accuracy of the data is ensured, and the interference data is avoided.
Drawings
FIG. 1 is a schematic structural diagram of an ADS-B data acquisition system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an intermediate frequency receiving module and a filter compensation control module according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an interference pulse detection module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fast discharge control module according to an embodiment of the present invention.
Reference numerals:
an ADS-B data acquisition device 10;
a first receiving antenna 101;
a first radio frequency receiving module 102;
an intermediate frequency receiving module 103;
an encoding and data processing module 104;
a data transmission module 105;
a second receiving antenna 106;
a filter compensation control module 107;
a first filter circuit 1071;
a second filter circuit 1072;
a third filter circuit 1073;
a fourth filter circuit 1074;
a fifth filter circuit 1075;
a sixth filter circuit 1076;
a seventh filter circuit 1077;
an eighth filter circuit 1078;
a clipping module 108;
a second radio frequency receiving module 109;
an interference pulse detection module 110;
a detection filter 1101;
a fast discharge control module 111.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, in one aspect, the present invention provides an ADS-B data collecting apparatus 10, including a first receiving circuit, where the first receiving circuit includes: the system comprises a first receiving antenna 101, a first radio frequency receiving module 102, an intermediate frequency receiving module 103, an encoding data processing module and a filtering compensation control module 107, wherein the first radio frequency receiving module 102 is in signal connection with the first receiving antenna 101; as shown in fig. 1, a wireless signal transmitted by the ADS-B transmitter is received through a first receiving antenna 101, and is transmitted to a first rf receiving module 102, and the received wireless signal is down-converted through the first rf receiving module 102 to output an intermediate frequency signal.
The intermediate frequency receiving module 103 is connected to the first radio frequency receiving module 102, and is configured to amplify, filter, and demodulate an intermediate frequency signal output by the first radio frequency receiving module 102 after down-conversion, and output the amplified, filtered, and demodulated intermediate frequency signal; as shown in fig. 1, the intermediate frequency receiving module 103 receives the intermediate frequency signal after down-conversion, and performs signal amplification, filtering and demodulation on the intermediate frequency signal for outputting, so as to perform ADC sampling on the original signal by the back-end circuit, thereby obtaining ADS-B original signal data.
The coded data processing module is connected with the intermediate frequency receiving module 103 so as to perform ADC signal sampling, decoding and data processing on the intermediate frequency signal output by the intermediate frequency receiving module 103; the coded data processing module performs ADC data sampling on the signal demodulated and amplified by the intermediate frequency receiving module 103, and decodes and processes the sampled data to obtain effective data sent by the ADS-B transmitter.
The filtering compensation control module 107 is respectively connected to the encoded data processing module and the intermediate frequency receiving module 103, and is configured to access the intermediate frequency receiving module 103 through the filtering compensation control module 107 when the encoded data processing module decodes the sampling signal for multiple times and an error code occurs, so as to perform filtering compensation adjustment on the intermediate frequency receiving module 103. The coding data processing module carries out decoding verification by receiving data and judges whether each data frame meets the requirement or not. If the requirements are met, it indicates that the receiver can normally receive data. Otherwise, it indicates that the receiver may not receive data normally. At this time, when the coded data processing module determines that an error code occurs for multiple times by decoding the sampled signal, the filtering frequency point of the filtering module on the intermediate frequency receiving module 103 may shift due to aging of the capacitor, or a doppler frequency change phenomenon due to aircraft flight speed change may cause the intermediate frequency receiving module 103 not to normally filter out an effective signal. At this time, the filter compensation control module 107 can be accessed to the intermediate frequency receiving module 103 to perform filter compensation adjustment on the intermediate frequency receiving module 103, so that the intermediate frequency receiving module 103 can filter out effective signals, thereby realizing effective reception of the signals.
In the embodiment of the invention, the coded data processing module is connected with the intermediate frequency receiving module 103 so as to perform ADC signal sampling, decoding and data processing on the intermediate frequency signal output by the intermediate frequency receiving module 103; the filtering compensation control module 107 and the encoded data processing module are used for accessing the intermediate frequency receiving module 103 through the filtering compensation control module 107 when the encoded data processing module decodes the sampling signal for a plurality of times and generates error codes, and performing filtering compensation adjustment on the intermediate frequency receiving module 103. In this way, the filter compensation control module 107 incorporates a capacitor and/or a resistor to adjust the frequency point of the intermediate frequency receiving module 103, so as to recover the frequency offset generated by the aging of the receiver resistor or capacitor, or the phenomenon that data cannot be normally received due to frequency variation caused by the flight of the airplane, and the like.
Referring to fig. 1, the ADS-B data collecting apparatus 10 further includes a second receiving circuit including: the system comprises a second receiving antenna 106, a second radio frequency receiving module 109 and an interference pulse detection module 110, wherein the second radio frequency receiving module 109 is connected with the second receiving antenna 106; as shown in fig. 1, the second receiving antennas 106 respectively receive wireless signals, transmit the wireless signals to the first rf receiving module 102, and down-convert the received wireless signals by the first rf receiving module 102 to output intermediate frequency signals.
The interference pulse detection module 110 is connected to the second rf receiving module 109, so as to perform interference pulse detection on the intermediate frequency signal output by the second rf receiving module 109 after down-conversion; as shown in fig. 1, the intermediate frequency signal output from the second rf receiving module 109 can be directly detected by the glitch detection module 110. For example, in one embodiment of the present invention, a logarithmic detector may be used directly to detect the intermediate frequency output signal directly.
The encoding data processing module is further connected to the interference pulse detection module 110, so as to perform ADC signal sampling on the detection signal output by the interference pulse detection module 110, and perform rejection processing on the decoded data packet of the first receiving loop when determining that the continuous interference pulse signal occurs in the second receiving loop. As shown in fig. 1, the interference pulse detection module 110 can detect the interference pulse, and the coded data processing module performs ADC sampling on the pulse signal output by the interference pulse detection module 110, and then compares the sampled pulse signal with a reference value, and if the pulse voltage is higher than the reference voltage value, the received signal at this time can be determined to be the interference pulse signal. At the moment, the decoded data packets before and after the moment can be removed through the coded data processing module, so that the situation of decoding error alarm or error alarm of the decoded data is avoided.
Referring to fig. 1, the ADS-B data collecting device 10 further includes a fast discharging control module 111, where the fast discharging control module 111 is respectively connected to the output end of the first receiving antenna 101 and the encoded data processing module, and is configured to communicate the fast discharging control module 111 with the output end of the first receiving antenna 101 when the encoded data processing module detects that the second receiving loop has multiple continuous interference pulses, so as to discharge lightning to the first receiving antenna 101. As shown in fig. 1, when the coded data processing module detects that the second receiving loop has a plurality of continuous interference pulses, the plurality of continuous interference pulses may be caused by a lightning strike phenomenon caused by thunderstorm weather. At this time, the fast discharge control module 111 can be communicated with the output end of the first receiving antenna 101 through the code data processing module to prevent lightning discharge to the first receiving antenna 101, so that a lightning strike large-current signal is prevented from entering the first radio frequency receiving module 102 and the intermediate frequency receiving module 103 through the first receiving antenna 101, and the first receiving loop is protected.
According to the embodiment of the invention, the second receiving circuit is used for sampling the input signal, the coded data processing module is used for judging whether a lightning stroke signal occurs or not, and when the lightning stroke occurs, the coded data processing module is incorporated into the rapid discharging control module 111 to release the lightning stroke pulse signal so as to avoid the abnormity of the receiver. Or when strong interference signals occur, the data packets of the received signals are removed, so that the accuracy of the data is ensured, and the interference data is avoided.
Referring to fig. 1, the ADS-B data collecting apparatus 10 further includes a limiting module 108, and the second receiving antenna is connected to the second rf receiving module 109 through the limiting module 108 to limit the amplitude of the second receiving antenna 106. As shown in fig. 1, since the second receiving loop is mainly used for detecting strong signals such as interference signals and lightning strike signals, the amplitude limiting module 108 is disposed between the second receiving antenna 106 and the second rf receiving module 109 to prevent the lightning strike strong signals from going to the second rf receiving module 109 and burning out the second rf receiving module 109.
Referring to fig. 3, the fast discharge control module 111 includes: the first change-over switch, the piezoresistor D1 and the capacitor C16, the control end of the first change-over switch is connected with the coded data processing module, and the output end of the first change-over switch is arranged between the first receiving antenna 101 and the first radio frequency receiving module 102; the coding data processing module can control the on or off of the channel of the first switch.
One end of the piezoresistor D1 is connected to the first channel of the first switch, and the other end of the piezoresistor D1 is connected with the reference ground; one end of the capacitor C16 is connected to the first channel of the first switch, and the other end of the voltage dependent resistor C16 is connected to the ground reference. As shown in fig. 3, the encoded data processing module performs selection control of channels by SW2a0, SW2a1, SW2a2, and SW2EN control terminals. For example, when SW2a0, SW2a1, SW2a2 and SW2EN are 0001, respectively, the varistor D1 and the capacitor C16 can be controlled to communicate with the antenna terminal RF-AN to achieve rapid discharge. When the SW2a0, the SW2a1, the SW2a2 and the SW2EN are 0000, respectively, the channel of the first switch is turned off, and the first antenna normally receives the wireless signal.
Referring to fig. 2, the filter compensation control module 107 includes: the control end of the second change-over switch is connected with the coded data processing module; as shown in fig. 2, the second switches are multi-channel switches, respectively, and are connected to the encoded data processing block through signal terminals SW1a0, SW1a1, SW1a2 and SW1EN, so as to perform channel selection conduction control under the control of connection of the encoded data processing block.
The input end of the first filter circuit 1071 is connected with the filter input end of the intermediate frequency receiving module 103, the output end of the first filter circuit 1071 is connected with the first channel of the second switch, and the output end of the second switch is connected with the filter output end of the intermediate frequency receiving module 103. As shown in fig. 3, the first filter circuit 1071 is disposed between the filter input and output terminals of the if receiving module 103 and in a parallel relationship with the filter circuit of the if receiving module 103, so that when the first channel of the second switch is turned on, the first filter circuit 1071 can be incorporated into both ends of the filter circuit of the if receiving module 103 to adjust the frequency point of the filter circuit of the if receiving module 103.
Referring to fig. 2, the filter compensation control module 107 further includes: a second filter circuit 1072, and/or a third filter circuit 1073, and/or a fourth filter circuit 1074, and/or a fifth filter circuit 1075, and/or a sixth filter circuit 1076, and/or a seventh filter circuit 1077, and/or an eighth filter circuit 1078, wherein the input end of the second filter circuit 1072 is connected with the filter input end of the intermediate frequency receiving module 103, and the output end of the second filter circuit 1072 is connected with the second channel of the second switch; the input end of the third filter circuit 1073 is connected with the filter input end of the intermediate frequency receiving module 103, and the output end of the third filter circuit 1073 is connected with the third channel of the second change-over switch; the input end of the fourth filter circuit 1074 is connected with the filter input end of the intermediate frequency receiving module 103, and the output end of the fourth filter circuit 1074 is connected with the fourth channel of the second switch; the input end of the fifth filter circuit 1075 is connected with the filter input end of the intermediate frequency receiving module 103, and the output end of the fifth filter circuit 1075 is connected with the fifth channel of the second switch; the input end of the sixth filtering circuit 1076 is connected with the filtering input end of the intermediate frequency receiving module 103, and the output end of the sixth filtering circuit 1076 is connected with the sixth channel of the second switch; the input end of the seventh filter circuit 1077 is connected with the filter input end of the intermediate frequency receiving module 103, and the output end of the seventh filter circuit 1077 is connected with the seventh channel of the second switch; an input end of the eighth filter circuit 1078 is connected to a filter input end of the intermediate frequency receiving module 103, and an output end of the eighth filter circuit 1078 is connected to an eighth channel of the second switch; the first filter circuit 1071, the second filter circuit 1072, the third filter circuit 1073, the fourth filter circuit 1074, the fifth filter circuit 1075, the sixth filter circuit 1076, the seventh filter circuit 1077, and the eighth filter circuit 1078 each have different filter values.
Specifically, as shown in fig. 2, by connecting 8 filter circuits having different filter values to the second air changeover switch, the filter circuit that selects the different filter values by the encoded data processing module is connected to the filter input/output terminal of the intermediate frequency receiving module 103. The frequency point of the filter circuit of the intermediate frequency receiving module 103 is adjusted.
Referring to fig. 2, the first filter circuit 1071 includes: one end of the capacitor C1 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the capacitor C1 is connected with the first channel of the second change-over switch; one end of the resistor R1 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the resistor R1 is connected with the first channel of the second change-over switch; the second filter circuit 1072 includes: one end of the capacitor C2 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the capacitor C2 is connected with the second channel of the second change-over switch; one end of the resistor R2 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the resistor R2 is connected with the second channel of the second change-over switch. As shown in fig. 2, each filter circuit is formed by connecting a resistor and a capacitor in parallel. In other embodiments, the two capacitors may be connected in series or only in a capacitive manner. To accommodate different types of intermediate frequency filter circuits.
Referring to fig. 3, the interference pulse detection module 110 includes: the input end of the logarithmic detector is connected with the output end of the detection filter 1101, and the output end of the logarithmic detector is connected with the coded data processing module. As shown in fig. 3, the logarithmic detector includes a logarithmic amplifier to perform a logarithmic detection process on the input signal. So that the ADC sampling and pulse detection judgment processing of the signal by the coding data processing module is facilitated.
Referring to fig. 3, the glitch detection module 110 may further include a detection filter 1101, where the detection filter 1101 is connected to the output terminal of the amplitude limiting module 108 for performing pulse signal filtering on the input signal; and the direct current or other interference signals are prevented from entering the logarithmic detector.
Referring to fig. 1, in another aspect, the present invention further provides an ADS-B data acquisition system, including: the ADS-B data acquisition device 10 comprises an ADS-B data storage and display module, the ADS-B data acquisition device 10 further comprises a data transmission module 105, and the data transmission module 105 is in communication connection with the coded data processing module; the effective data collected by the ADS-B data collection device 10 can be transmitted to the ADS-B data storage and display module through the data transmission module 105.
The ADS-B data storage and display module is connected with the data transmission module 105 on the ADS-B data acquisition device 10 through a network. The ADS-B data storage and display module can store and display the data sent by the ADS-B data acquisition device 10.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An ADS-B data acquisition device comprising a first receive loop, the first receive loop comprising:
a first receiving antenna;
the first radio frequency receiving module is in signal connection with the first receiving antenna;
the intermediate frequency receiving module is connected with the first radio frequency receiving module so as to amplify, filter and demodulate the intermediate frequency signal output by the first radio frequency receiving module after down conversion and output the intermediate frequency signal;
the coded data processing module is connected with the intermediate frequency receiving module so as to perform ADC signal sampling, decoding and data processing on the intermediate frequency signal output by the intermediate frequency receiving module;
the filtering compensation control module is respectively connected with the coded data processing module and the intermediate frequency receiving module and is used for performing filtering compensation adjustment on the intermediate frequency receiving module by accessing the filtering compensation control module to the intermediate frequency receiving module when the coded data processing module decodes the sampling signal and error codes appear for multiple times;
wherein, still include the second receiving loop, the second receiving loop includes:
a second receiving antenna;
the second radio frequency receiving module is connected with the second receiving antenna;
the interference pulse detection module is connected with the second radio frequency receiving module and is used for detecting interference pulses of intermediate frequency signals output by the second radio frequency receiving module after down-conversion;
the coding data processing module is also connected with the interference pulse detection module so as to carry out ADC signal sampling on the detection signal output by the interference pulse detection module and eliminate the decoding data packet of the first receiving loop when judging that the continuous interference pulse signal occurs in the second receiving loop.
2. The ADS-B data collection device of claim 1, further comprising a fast discharge control module, wherein the fast discharge control module is respectively connected to the output end of the first receiving antenna and the encoded data processing module, and is configured to communicate the fast discharge control module with the output end of the first receiving antenna when the encoded data processing module detects that the second receiving loop has multiple continuous interference pulses, so as to prevent lightning discharge of the first receiving antenna.
3. The ADS-B data collection device of claim 2, further comprising a clipping module, wherein the second receiving antenna is connected to the second rf receiving module through the clipping module to limit the amplitude of the second receiving antenna.
4. The ADS-B data collection device of claim 2, wherein the fast discharge control module comprises:
the control end of the first selector switch is connected with the coded data processing module, and the output end of the first selector switch is arranged between the first receiving antenna and the first radio frequency receiving module;
a voltage dependent resistor D1, one end of the voltage dependent resistor D1 is connected to the first channel of the first switch, and the other end of the voltage dependent resistor D1 is connected with the reference ground;
and one end of the capacitor C16 is connected to the first channel of the first switch, and the other end of the voltage dependent resistor C16 is connected to the reference ground.
5. The ADS-B data collection device of claim 2, wherein the filter compensation control module comprises:
the control end of the second selector switch is connected with the coded data processing module;
the input end of the first filter circuit is connected with the filter input end of the intermediate frequency receiving module, the output end of the first filter circuit is connected with the first channel of the second selector switch, and the output end of the second selector switch is connected with the filter output end of the intermediate frequency receiving module.
6. The ADS-B data acquisition device of claim 5, wherein the filter compensation control module further comprises:
the input end of the second filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the second filter circuit is connected with a second channel of the second selector switch;
the input end of the third filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the third filter circuit is connected with a third channel of the second selector switch;
the input end of the fourth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the fourth filter circuit is connected with a fourth channel of the second selector switch;
the input end of the fifth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the fifth filter circuit is connected with a fifth channel of the second selector switch;
the input end of the sixth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the sixth filter circuit is connected with a sixth channel of the second selector switch;
the input end of the seventh filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the seventh filter circuit is connected with a seventh channel of the second selector switch;
the input end of the eighth filter circuit is connected with the filter input end of the intermediate frequency receiving module, and the output end of the eighth filter circuit is connected with an eighth channel of the second selector switch;
the first filter circuit, the second filter circuit, the third filter circuit, the fourth filter circuit, the fifth filter circuit, the sixth filter circuit, the seventh filter circuit and the eighth filter circuit are respectively different filter values.
7. The ADS-B data acquisition device of claim 6, wherein the first filter circuit comprises:
one end of the capacitor C1 is connected to the filter input end of the intermediate frequency receiving module, and the other end of the capacitor C1 is connected to the first channel of the second switch;
one end of the resistor R1 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the resistor R1 is connected with the first channel of the second switch;
the second filter circuit includes:
one end of the capacitor C2 is connected to the filter input end of the intermediate frequency receiving module, and the other end of the capacitor C2 is connected to the second channel of the second switch;
one end of the resistor R2 is connected with the filtering input end of the intermediate frequency receiving module, and the other end of the resistor R2 is connected with the second channel of the second switch.
8. The ADS-B data acquisition device of claim 3, wherein the glitch detection module comprises:
and the input end of the logarithmic detector is connected with the output end of the detection filter, and the output end of the logarithmic detector is connected with the coded data processing module.
9. An ADS-B data acquisition system comprising:
the ADS-B data collection device of any of claims 1 to 8, further comprising a data transmission module communicatively coupled to the encoded data processing module;
and the ADS-B data storage and display module is in network connection with the data transmission module on the ADS-B data acquisition device.
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