KR20170024323A - Interrogator of the multilateration - Google Patents

Abstract

The present invention relates to a question sending apparatus for a multivariate measurement and monitoring system, which generates a mode A interrogation signal, a mode C interrogation signal, and a mode interrogation signal for a moving object in a monitoring area of a three-dimensional space and a moving object entering the monitoring area A question signal generator; A frequency converter for converting the mode A interrogation signal, the mode interrogation signal and the mode interrogation signal into a frequency band for radio transmission; A high power amplifier for amplifying the converted question signal to a high power level; A controller for determining a pattern of a question signal using a predetermined algorithm and controlling the question signal; And a precise time synchronization unit for synchronizing the time of the question sending apparatus. Accordingly, when a plurality of reception devices installed on the ground detect a plurality of responses, a controlled response is induced to improve the positioning accuracy of the moving object.

Description

{INTERROGATOR OF THE MULTILATERATION}

The disclosed technique relates to a question sending apparatus for a multivariate measurement monitoring system.

The multivariate measurement and monitoring system transmits a mode A interrogation signal, a mode C interrogation signal, and a mode A interrogation signal to a moving object in the monitoring area of the three-dimensional space and a moving object entering the monitoring area, A response signal for a question signal and a mode A inquiry signal is derived and received by a plurality of reception devices installed on the ground, and the central processing unit locates a precise position in the three-dimensional space with respect to the moving object.

Meanwhile, the multifiber measurement and monitoring system includes a question transmitter for transmitting the question signals. The interrogator transmits Mode A, Mode C, and Mode S interrogation signals to the mobile device in order to derive Mode A, Mode C, and Mode S response signals from the mobile device in the monitoring area of the three- .

However, if the question signal transmitted from the question transmitter does not follow proper procedures, a collision may occur between a moving object already existing in the monitoring area of the three-dimensional space and a moving object entering into the monitoring area, and a plurality of In the receiving apparatus, a plurality of signals are overlapped due to the phenomenon of synchronous variable and asynchronous transmission (False Replies From Unsynchronized Interrogator Transmission), and the discrimination power between received signals is reduced. Furthermore, the reception of a plurality of signals increases the computational throughput, which results in a problem that the processing speed of the trajectory is slowed down.

Korean Patent Laid-Open No. 10-2011-0095637 (entitled Aircraft Collision Avoidance Communication System) is a prior art for a multivariate measurement and monitoring system.

The disclosed technique is to provide a question sending apparatus that transmits a mode A interrogation signal, a mode C interrogation signal, and a mode interrogation signal to a moving object in a monitoring area of a three-dimensional space and a moving object entering the monitoring area.

According to a first aspect of the present invention, there is provided a method of generating a mode A question signal, a mode C question signal, and a mode S question signal for a moving object in a monitoring area of a three-dimensional space and a moving object entering the monitoring area, A frequency converter for converting the signal generator, the mode A interrogation signal, the mode C interrogation signal and the mode interrogation signal into a frequency band for radio transmission, a high power amplifier for amplifying the converted interrogation signal at a high power level, And a precise time synchronization unit for determining a pattern of the question signal using a predetermined algorithm and for synchronizing the time of the question sending apparatus and the control unit for controlling the question signal.

Embodiments of the disclosed technique may have effects that include the following advantages. It should be understood, however, that the scope of the disclosed technology is not to be construed as limited thereby, since the embodiments of the disclosed technology are not meant to include all such embodiments.

According to an embodiment of the disclosed technology, a question sending apparatus for a multivariate measurement and monitoring system transmits a question signal for each mode and derives a controlled response when detecting a plurality of responses from a plurality of receiving apparatuses installed on the ground, And provides an effect of improving the precision.

1 is a block diagram of a question sending apparatus according to an embodiment of the disclosed technique.
2 is a diagram showing the configuration of a multivariate measurement and monitoring system according to an embodiment of the disclosed technology.
FIG. 3 is a diagram showing a moving object in a monitoring area of a three-dimensional space and a moving object entering into the monitoring area in an embodiment of the disclosed technology.
4 is a diagram showing Whispershough question transmit power transmitted by a question transmitting apparatus to a moving object entering a monitoring area of a three-dimensional space in the disclosed technique.
5 is a block diagram of a question signal generating unit of a question sending apparatus according to an embodiment of the disclosed technique.
FIG. 6 is a diagram of a whisperhough generation portion of a question signal generator in an embodiment of the disclosed technique. FIG.
FIG. 7 is a diagram illustrating a whispershough question signal obtained by synthesizing in a whispershough generating unit according to an embodiment of the disclosed technology. FIG.
FIG. 8 is a diagram illustrating a whisper shoehour monitoring period of the multivariate measurement monitoring system according to an embodiment of the disclosed technology.
FIG. 9 is a flowchart showing a sequence of a question sequence in a surveillance region of the multivariate measurement monitoring system according to an embodiment of the disclosed technology.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, A, B, etc., may be used to describe various components, but the components are not limited by the terms, but may be used to distinguish one component from another . For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that the singular < RTI ID = 0.0 > terms < / RTI > used herein should be interpreted to include a plurality of representations unless the context clearly dictates otherwise. And "comprises ", when used in this specification, specify the presence of stated features, numbers, steps, operations, elements, parts, or combinations thereof, Or combinations thereof, as a matter of course.

Before describing the drawings in detail, it is to be clarified that the division of constituent parts in this specification is merely a division by main functions of each constituent part. That is, two or more constituent parts to be described below may be combined into one constituent part, or one constituent part may be divided into two or more functions according to functions that are more subdivided.

In addition, each of the constituent units described below may additionally perform some or all of the functions of other constituent units in addition to the main functions of the constituent units themselves, and that some of the main functions, And may be carried out in a dedicated manner. Accordingly, the presence or absence of each component described in this specification should be interpreted as a function.

1 is a block diagram of a question sending apparatus according to an embodiment of the disclosed technique. 1, the question sending apparatus includes a question signal generator, a frequency converter, a high-power amplifier, a controller, and a precision time synchronizer. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

The question sending apparatus according to an embodiment of the disclosed technology derives a mode A response signal, a mode C response signal, and a mode S response signal from a moving object entering a monitoring area and a moving object in a monitoring area of a three-dimensional space in the multivariate measurement monitoring system In order to calculate the arrival time of the response signal of the moving object received by the plurality of receiving apparatuses 501 to 504 provided on the ground and perform accurate positioning with respect to the moving object, the moving object in the monitoring area of the three- The mode A interrogation signal, the mode C interrogation signal, and the mode interrogation signal, and effectively transmits the interrogation signal for each surveillance region.

The question transmitter 100 uses the mode A interrogation signal, the mode C interrogation signal, and the mode interrogation signal in the multivariate measurement and monitoring system to move the moving object in the monitoring area of the three-dimensional space and the moving object intruding into the monitoring area, Thereby receiving a response signal from a mobile device equipped with a mode A, mode C, and mode S transponder in a plurality of receiving apparatuses 501 to 504 installed on the ground, It is possible to detect a moving object in the monitoring area of the three-dimensional space and a moving object entering the monitoring area in order to minimize the superimposition phenomenon of the received signal due to the gap and the asynchronous fruit and to avoid the collision between the moving objects, You can help.

The question sending apparatus 100 sequentially transmits a mode A question and a mode C question to a moving object in a monitoring area of a three-dimensional space of the multivariate measurement and monitoring system and a moving object entering the monitoring area in a whisper- A control method and a question control method for individually performing a question on a mode S to derive a response signal for a moving object to be monitored and measuring the reception time of a response signal at a plurality of receiving apparatuses to precisely measure the position of the moving object, Can be improved.

The question transmitter 100 transmits a mode A interrogation signal, a mode C interrogation signal, and a mode interrogation signal to a mobile body in the monitoring area of the three-dimensional space and a mobile body intruding into the surveillance area in the multivariate measurement and monitoring system, It is possible to improve the reliability of the multivariate measurement and monitoring system by improving the positioning accuracy with respect to the moving object by transferring the question transmission time of the multivariate measurement monitoring system to the central processing unit.

The question signal generating unit 110 receives question schedule information from a question signal scheduling unit (not shown) of the central processing unit 600 and generates a mode A question signal, a mode C question signal, and a mode S inquiry signal .

The frequency converter 120 frequency-converts the mode A interrogation signal, the mode C interrogation signal, and the mode interrogation signal of the interrogation signal generator 110 into a signal band suitable for radio transmission. Here, the mode A, the mode C, and the mode S are included in the air transponder mode, and the mode S is compatible with the mode A / C.

The high power amplifier 130 amplifies the mode A interrogation signal, the mode C interrogation signal, and the mode interrogation signal frequency-converted into the radio signal band by the frequency converter 120 to a high power level.

The control unit 140 generates a question signal pattern by a predetermined algorithm to induce a response of the moving objects 200 and 300 to the moving objects 200 and 300 entering the monitoring area and the moving objects in the monitoring area of the three- And determines the question signal transmission time by scheduling the transmission time of the question transmission signal to determine the question signal transmission time and transmits the Whisper-Shaku question (200, 300) to the moving object (200, 300) And transmits the mode A interrogation signal, the mode C interrogation signal, and the mode interrogation signal in the control method, and transmits the interrogation signal transmission time to the central processing unit 600.

The precise time synchronization unit 150 receives a time synchronizing signal from any one of a plurality of receiving apparatuses disposed adjacent to the question sending apparatus 100 among the plurality of receiving apparatuses 501-504 And a 1PPS signal from a built-in GNSS receiver, and generates a precise time synchronization signal by phase-synchronizing with the precise reference signal generator constituting the precise time synchronization unit, To the frequency conversion unit 120 to perform the precise time synchronization of the question transmitter 100.

The controller 160 controls the operation of the question signal generator 110, the frequency converter 120, the high power amplifier 130, the controller 140 and the visual synchronization unit 150, Lock state, power state, transmission output power state, etc., and express through LED, LCD, and other local remote control devices.

2 is a diagram showing the configuration of a multivariate measurement and monitoring system according to an embodiment of the disclosed technology. Referring to FIG. 2, the multivariate measurement and monitoring system includes an interrogating transmitter (ITX) 100, a reference and monitoring transponder (RMT) 400, a plurality of reception devices RU a receiver unit 501-504, a central processing unit (CPS) 600, and a control and monitoring system (CMS)

The question sending apparatus 100 may be constituted independently or may be arranged adjacent to a plurality of receiving apparatuses 501 to 504. In both cases, And receives the synchronization signal to be synchronized with the system.

The question sending apparatus 100 includes a secondary surveillance radar (SSR) used in an air traffic control system toward a plurality of mobile units 200 and 300 equipped with a mode A, a mode C, and a mode S transponder, A mode A question signal, a mode C question signal, and a mode S inquiry signal. That is, for a plurality of moving objects 200 and 300 entering into a moving object and a surveillance area in a three-dimensional space monitoring area, the question sending device 100 transmits a mode A interrogation signal and a mode C And transmits a question signal to derive a mode A response signal and a mode C response signal.

The interrogator 100 includes a plurality of receiving devices 501 to 503 disposed on the ground and a plurality of mobile objects 200 and 300 received by the plurality of receiving devices 501 to 503, And sends a mode A interrogation signal and a mode C interrogation signal in a whisper-shuffle interrogation transmission scheme in order to minimize false rejects and unsynchronized interrogator transmission (FRUIT) phenomena.

Accordingly, a plurality of receiving apparatuses 501 to 504 in the ground sequentially receive a response signal, and the plurality of receiving apparatuses 501 to 504 detect and decode the mode A response signal and the mode C response signal, The positioning device 600 improves positioning precision for a plurality of mobile objects 200 and 300 and improves aviation safety.

The reference monitoring transponder 400 is disposed at any known position, transmits a reference signal for time synchronization of the multivariate measurement and monitoring system, receives a question signal for integrity check, converts it into a supervisory signal again, Thereby enhancing the positioning reliability of the multivariate measurement and monitoring system.

The plurality of receiving apparatuses 501-504 are disposed at any known positions and receive a reference monitoring signal from the reference monitoring transponder 400 to detect a time between the plurality of receiving apparatuses 501-504 And wherein any one of the plurality of receiving apparatuses (501-504) is arranged adjacent to the question transmitting apparatus (100), and the plurality of receiving apparatuses (501-504) Outputs the time synchronizing signal synchronized with the time synchronizing signal of the ponder 400 and transmits the time synchronizing signal to the question sending apparatus 100 to be used as the precise time synchronizing signal of the question sending apparatus 100. [

When the reference monitoring transponder 400 malfunctions, is inoperable due to a power problem, is inoperable, or has an abnormal performance, the GNSS satellite 800 ) Signal and uses it as a time synchronization signal.

The central processing unit 600 generates question schedule information for controlling a question transmission signal of the multivariate measurement and monitoring system and transmits the question schedule information to the question sending apparatus 100. The interrogator 100 receives the question schedule information of the central processing unit 600 and transmits a mode A interrogation signal, a mode C interrogation signal, and a mode interrogation signal using the Whisper-Shadow transmission function.

The control and monitoring apparatus 700 receives the data subjected to the navigation calculation on the plurality of moving objects 200 and 300 in the central processing unit 600 and receives the moving object in the monitoring area of the three- (100, 300, 300), and the interrogator (100), the plurality of receiving apparatuses (501-504), the reference monitoring transponder (400) and the central processing unit (600) and so on.

FIG. 3 is a diagram showing a moving object in a monitoring area of a three-dimensional space and a moving object entering into the monitoring area in an embodiment of the disclosed technology. Referring to FIG. 3, the question transmitter 100 efficiently performs surveillance area management through Whisper-Shadow question control.

Here, the whisper-shuffle question function divides the question transmission power of the question transmitter 100 into a predetermined power level for each monitoring period, and controls the inquiry order to inquire the mobile 200, 300 in each monitoring area .

In one embodiment, the interrogator 100 transmits a question signal preferentially to the nearest mobile 200, 300, increases the interrogation range while gradually increasing the interrogation power, 200, and 300, and reduce the query range while gradually reducing the query transmission power.

The Whisper-Shuffle question signal transmission determines the WS coverage whisper-shout coverage of the interrogator 100 capable of detecting the mobile 200, 300 entering each surveillance area.

On the other hand, the question surveillance region (WS coverage) of the question sending apparatus 100 is constituted by the pulse signals of the suppression pulse S1 and the interrogation pulses P1, P3 and P4 and transmitted to the moving bodies 200 and 300 intruding into each surveillance region .

Control the WS coverage, which is the power level difference between the suppression pulse S1 and the interrogation pulses P1, P3 and P4, to control the number of mobile objects 200, 300 entering each monitoring area.

In the low-density traffic environment, the suppression pulse S1 level is transmitted as low as several tens of dB below the interrogation pulses P1, P3, and P4. In order to inquire more finely about the plurality of mobile objects 200 and 300 in the high- The S1 level is scheduled to be transmitted several dB lower than the query pulses P1, P3 and P4.

FIG. 4 is a diagram showing the Whispershough question transmission power that the question transmitter 100 transmits to a moving object entering into the monitoring area of the three-dimensional space in the disclosed technique. Referring to FIG. 4, the question signal IR1 covering the surveillance region closest to the question transmitter 100 does not transmit the suppression pulse S1, and the N-1 question signals IR2, IR3, ... except for the question signal IR1. , The IRN controls the WS coverage, which is the power level difference between the suppression pulse S1 and the interrogation pulses P1, P3 and P4, so that the Whisper-Sight function is performed.

The Nth inquiry transmission signal IRN transmitted from the QMS 100 has the largest area of WS coverage and therefore has a high probability that a plurality of mobile units 200 and 300 exist, The power level ratio (WS coverage) between the suppression pulse S1 and the interrogation pulses P1, P3 and P4 is set to be small according to the schedule information so that the synchronization of the mode A response signal and the mode C response signal in the multivariate measurement and monitoring system By avoiding overlapping, the detection probability of a plurality of mobile units 200 and 300 can be improved.

5 is a block diagram of a question signal generating unit of a question sending apparatus according to an embodiment of the disclosed technique. 5, the question signal generating unit 110 includes a mode A / C question signal generating unit 111, a mode S interrogation signal generating unit 112, a whisper-cane generating unit 113, a digital variable attenuator 114 and a question signal synthesis unit 115. [

The question signal generating unit 110 receives the question schedule information from the question signal scheduling unit (not shown) of the central processing unit 600 and outputs the question signal to the mode A / C question signal generating unit 111, And a mode S interrogation signal is generated in the mode interrogation signal generator 112.

The whisper-shoe generating unit 113 receives the mode A / C question signal generated by the mode A / C question signal generating unit and forms a whisper-shuffle question signal pattern.

Meanwhile, the digital variable attenuator 114 periodically varies the mode S interrogation signal generated by the mode interrogation signal generator 112 to a predetermined attenuation range.

The interrogation signal synthesis unit 115 synthesizes the mode A interrogation signal, the mode C interrogation signal, and the mode interrogation signal so as to have a predetermined time difference, and transmits them to the frequency conversion unit 120.

FIG. 6 is a diagram of a whisperhough generation portion of a question signal generator in an embodiment of the disclosed technique. FIG. Referring to FIG. 6, the whisper-shoe generating unit 113 generates the question pulse P1, P3 and P4 including the suppression pulse S1 as the mode A / C question signal, Form a question signal.

FIG. 7 is a diagram illustrating a whispershough question signal obtained by synthesizing in a whispershough generating unit according to an embodiment of the disclosed technology. FIG. Referring to FIG. 7, the whisper-shuffle question signal includes a moving object in a monitoring area of a three-dimensional space and a query pulse P1 (not shown) according to the traffic density of moving objects 200 and 300 entering the monitoring area, , A suppression pulse S1 whose power level is lower than several dB to several tens of dB lower than P3 and P4 is first transmitted at the position of 2 us than the interrogation pulses P1, P3 and P4.

The suppression pulse S1 transmits at a power level lower than the interrogation pulses P1, P3 and P4 so as to be able to respond only when a plurality of mobile objects 200 and 300 detect the interrogation pulses P1, P3 and P4.

FIG. 8 is a diagram illustrating a whisper shoehour monitoring period of the multivariate measurement monitoring system according to an embodiment of the disclosed technology. Referring to FIG. 8, the Whisper-ShoWa monitoring period is applied to a plurality of moving objects 200 and 300 in which a single query sequence invades a moving object in a monitoring area of a three-dimensional space and a monitoring area.

In one embodiment, a mode A interrogation signal, a mode C interrogation signal, and a mode interrogation signal are transmitted to the plurality of mobile objects 200 and 300 in the interrogator 100, This monitoring period may be the time during which the tracking process of the mode A response signal, the mode C response signal, and the mode S response signal is last performed.

When the interrogator 100 sequentially transmits a question signal IRN to a plurality of moving objects 200 and 300 entering into a moving object and a monitoring area in a three-dimensional space monitoring area, the plurality of moving objects 200 and 300 And sequentially transmits the response signal RPN after a predetermined time has elapsed.

The inquiry signal IRN and the response signal RPN are scheduled to be managed at regular intervals in consideration of the response signal processing time of the plurality of receiving apparatuses RU and the central processing unit 600. [ After the question sequence of the Whisper-ShoWa monitoring period is completed and the calculation processing data of the response signal is stored in the central processing unit 600, the target update processing for the plurality of moving objects is started.

FIG. 9 is a flowchart showing a sequence of a question sequence in a surveillance region of the multivariate measurement monitoring system according to an embodiment of the disclosed technology. Referring to FIG. 9, the interrogation signal is transmitted according to the whisper-whoshed monitoring period and the query transmission apparatus 100, the plurality of reception apparatuses 501-504 and the plurality of reception apparatuses 501-504, The flow of the Whisper-Shough question sequence according to the interlocking of the central processing unit 600 can be confirmed.

As described above with reference to FIG. 2, when one query sequence is transmitted from the interrogator 100 in the multivariate measurement and monitoring system toward the plurality of mobile units 200 and 300, the interrogator 100 transmits ) Procedure to initialize the transmit power of the mode A interrogation signal, the mode C interrogation signal, and the mode S interrogation signal.

According to the procedure of S120, the interrogator 100 sets the interrogation signal transmission power at the maximum or minimum electric power, and transmits the interrogation signal to the plurality of mobile objects 200 and 300 To send a mode A interrogation signal, a mode C interrogation signal, and a mode S interrogation signal.

The mode A response signal, the mode C response signal, and the mode S response signal are received from the plurality of mobile stations 200 and 300 at the plurality of receiving apparatuses 501-504 according to the procedure of S130, Estimates the wake of the plurality of mobile objects (200, 300) in the device (600).

In step S140, the central processing unit 600 determines the trajectory range of the plurality of moving objects 200 and 300, and in the central processing unit 600, (200, 300) is within a predetermined limit range.

If it is determined in step S150 that the trajectory range of the plurality of moving objects is not equal to the predetermined limit range, the procedure of steps S120 to S150 is repeated. In step S150, The query signal transmission power of the interrogator 100 may be reduced or increased to a predetermined level according to the procedure when the wake range of the interrogator 100 is within the predetermined limit range (S160).

In step S170, the mobile station 200 transmits the interrogation signal transmission power according to the procedure of step S160, and transmits a mode A response signal, a mode C response signal, S response signal is detected, the above steps (S140) to (S180) are repeated.

If the mode A response signal, the mode C response signal, and the mode S response signal are not detected from the plurality of mobile units 200 and 300 according to the procedure (S180), the query transmitter 100 (S170) and repeats the procedure to detect the mode A response signal, the mode C response signal, and the mode S response signal from the plurality of mobile units 200 and 300 .

Therefore, by performing the above-described steps, it is possible to provide the effect of improving the positioning precision for the moving object by inducing the controlled response.

Although the question sending apparatus for a multivariate measurement monitoring system according to an embodiment of the disclosed technology has been described with reference to the embodiments shown in the drawings for the sake of understanding, the present invention is not limited thereto. It will be understood that various modifications and equivalent embodiments are possible. Accordingly, the true scope of protection of the disclosed technology should be determined by the appended claims.

100: Question sending apparatus 200:
300: ground moving vehicle 400; Reference monitoring transponder
501 to 504: Multiple receiving apparatuses 600: Central processing unit
700: Controlled monitoring device 800: GNSS satellite

Claims (5)

A question signal generator for generating a mode A interrogation signal, a mode C interrogation signal and a mode S interrogation signal for a moving object in a monitoring area of a three-dimensional space and a moving object entering the monitoring area;
A frequency converter for converting the mode A interrogation signal, the mode interrogation signal and the mode interrogation signal into a frequency band for radio transmission;
A high power amplifier for amplifying the converted question signal to a high power level;
A controller for determining a pattern of a question signal using a predetermined algorithm and controlling the question signal; And
And a precise time synchronization unit for synchronizing the time of the question sending apparatus. 2. The multifunctional measurement monitoring system according to claim 1,
And an inspection unit for checking at least one of an operation state of the question signal generation unit, the frequency conversion unit, the high power amplifier, the control unit and the precision time synchronization unit, a door lock state, a power supply state, Question sending device for system. The apparatus of claim 1, wherein the question signal generator comprises:
A question sending apparatus for a multivariate measurement and monitoring system that receives question schedule information from a central processing unit and performs a Whispershough question sequence. The apparatus of claim 1, wherein the question signal generator comprises:
A mode A / C question signal generator for generating a mode A / C question signal;
A mode S interrogation signal generator for generating a mode interrogation signal;
A whispershough generation unit for performing a whispershough question sequence according to question schedule information;
A digital variable attenuator for varying the question signal to a predetermined attenuation value; And
And a question signal synthesizer for synthesizing the question signals. The apparatus of claim 4, wherein the question signal generator comprises:
Wherein the mode A / C question signal is composed of a suppression pulse and a predetermined question pulse string and is varied to a predetermined attenuation value.

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