KR101986357B1 - Telemetry receiving system for sea - Google Patents

Abstract

[0001] The present invention relates to a remote measurement and reception system for marine water, comprising a receiver (10) mounted on an unmanned buoy at sea for receiving data transmitted by a telemetry device of a vehicle, and a storage device And a power control unit 60 for supplying power to the storage device. The storage device 20 detects a distributed frame synchronization pattern from the data received by the receiver, Extracts the telemetry frame based on the reference frame, and rearranges and stores the telemetry frame so that the synchronization pattern is continuous.
The present invention has an advantage of solving various problems and visibility securing problems occurring in a wireless channel environment.

Description

{TELEMETRY RECEIVING SYSTEM FOR SEA}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telemetry reception system for maritime water, and more particularly to a maritime telemetry reception system for receiving transmission data of a telemetry device at sea.

Newly developed air vehicles should demonstrate stability and suitability of design parameters through flight tests.

The telemetry system for the flight test is a system in which a telemetry device is installed in a flight body and transmits various measurement information obtained from the sensors attached to the flight body and the status information of the subsystem constituting the flight to the remote measurement station on the ground .

Since these telemetry systems transmit and receive data using wireless communications, their performance depends on the radio channel environment between the transmitter in the airborne body and the telemetry receiver on the ground.

However, due to various factors such as the distance between the transmitter-mounted aircraft and the remote measurement station on the ground, the characteristics of the terrain, the speed of the flight vehicle, etc.,

Flight tests are performed mostly on the sea because of safety problems. The longer the flight distance, the more difficult it is to obtain visibility for the entire flight test section, especially for low flying aircraft.

The easiest way to solve various problems that may arise in a wireless channel environment is to operate multiple remote measurement stations. However, since the existing terrestrial telemetry station is located on the land, it is necessary to operate an antenna with a large diameter because it is far from the airplane that is flying in the sea. Therefore, not only the operation cost is very high but also the visibility distance problem is solved There is a limit.

Patent Document 1: Korean Patent Laid-Open Publication No. 2016-0020776 (published Feb. 26, 2016)

An object of the present invention is to provide a method and system for providing a visual distance and a variety of wireless channel environment problems that can occur while operating a remote measurement station on the ground in a flight test performed in the sea, And to provide a receiving remote measurement receiving system for maritime receivers.

According to an aspect of the present invention, there is provided a receiver for receiving data transmitted from a remote measurement device of a vehicle, the receiver being mounted on an unmanned buoy at sea. A storage for storing data received by the receiver; And a power control unit for supplying power to the storage device; Wherein the storage device detects a distributed frame synchronization pattern from the data received by the receiver and extracts a telemetry frame based on the synchronization pattern and rearranges the telemetry frames so that the synchronization pattern is continuous .

The receiver and the storage device are maintained in the standby mode when the received signal strength is X or less, and are switched to the normal operation mode when the received signal strength is X or more.

The storage device stores data after the synchronization signal of the frame is received consecutively Y or more times.

The storage device includes a mode for storing only a frame whose frame synchronization is normal and a mode for storing both the frame synchronization.

The storage device reads the time of the internal timer, generates a file name, and divides and stores the file name in units of Z minutes.

The internal timer is GPS time synchronization.

The power source control unit can be turned ON / OFF by a remote control at a remote place.

The receiver, the storage device, and the power control unit are installed in the waterproof case and then mounted on the unmanned buoy at sea.

A telemetry receiving antenna mounted on an unmanned buoy at sea for receiving an RF signal transmitted by a telemetry device of a vehicle, a control signal receiving antenna for receiving a control RF signal transmitted from a terrestrial telemetry station, A data receiving unit for receiving a received RF signal and converting the received RF signal into a PCM signal, a data storage unit for storing the PCM signal, a control signal receiving unit for decoding the control RF signal received by the control signal receiving antenna, And a power control unit for supplying power to the data storage unit and controlling the power supply according to a control signal input to the control signal receiving unit.

The data receiving unit includes a RF coupler for receiving the RF signal, a demodulator for generating a PCM signal by demodulating the RF signal, and an RF power meter for measuring a signal reception intensity of the RF signal and transmitting the measured signal intensity to the data storage unit.

The data storage unit may include a frame extraction control unit for extracting a telemetry frame from the PCM signal, determining whether to store the telemetry frame based on the signal reception intensity of the RF signal, and storing the telemetry frame, To the outside.

Wherein the data storage unit includes a frame extraction control unit for extracting a telemetry frame from the PCM signal and storing the telemetry frame only after the telemetry frame synchronization is received consecutively Y times or more, Network interface.

And a GPS antenna for receiving the position information and the time information of the unmanned buoy. The data storage unit generates a file based on the time received from the GPS, and stores the divided file in a size smaller than a predetermined size.

The RF signal transmitted by the telemetry device of the airplane is transmitted in a frame in which the synchronization is dispersed, and the frame is synchronized with the frame synchronously detected by the data receiver.

The present invention is capable of receiving transmission data of a telemetry device in the sea, thereby solving various problems and visibility securing problems occurring in a wireless channel environment. In addition, since the present invention can operate a plurality of receiving systems at a low cost, the signal quality can be improved by a space diversity technique.

Therefore, the present invention is applicable to telemetry systems and related development projects that require measurement of air vehicles such as airplanes.

1 is a schematic configuration diagram of a telemetry reception system according to the present invention;
FIG. 2 is a schematic configuration diagram of a data receiving unit of a remote measurement receiving system according to the present invention; FIG.
3 is a schematic configuration diagram of a data storage unit of a remote measurement receiving system according to the present invention.
4 is a conceptual diagram of a frame reordering method of a data receiving unit according to the present invention;
5 is a configuration diagram of frame synchronization detection logic of a data receiving unit according to the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A remote measurement and reception system for marine water of the present invention includes a receiver for receiving data transmitted by a telemetry device mounted on an unmanned buoy at sea, a storage device for storing data received by the receiver, and a power source And a control unit.

The telemetry device transmits data such as various measurement information obtained from the sensors attached to the air vehicle and status information of the subsystem constituting the air vehicle mounted in the air vehicle.

The storage device detects the data in a dispersed frame synchronization pattern, and then stores the frames by rearranging them so that the synchronization signals are continuous.

A telemetry device that moves at high speed due to being mounted in a flight vehicle can minimize the delay from the measurement time to the transmission time by transmitting frame data including a dispersed synchronization signal instead of a continuous synchronization signal. The receiving system of the present invention has compatibility with a telemetry device that transmits frame data including a dispersed synchronous signal by storing frame synchronizations and then rearranging the frames and storing them in the form of synchronous alignment frames, Can be used to analyze the stored data.

The receiver and the storage device are maintained in the standby mode when the received signal strength is X or less, and can be switched to the normal operation mode when the received signal strength is X or more. Or the storage device can store data after the synchronization signal of the frame is received consecutively Y or more times. This is because only effective data is stored so as to efficiently use the battery and memory of the receiving system.

The storage device may include a mode for storing only a frame whose frame synchronization is normal and a mode for storing both frame synchronization.

The storage device includes a function of generating a file name after reading the time of the internal timer, and dividing and storing the file name in units of Z minutes. The internal timer is GPS time synchronization. The GPS time synchronization is adjusted to the satellite GPS time and can be used by connecting the GPS antenna.

The power control unit can be controlled ON / OFF by remote control from a long distance. In order to extend the operating time of the battery, it is necessary to control the operation of the power source control unit since the battery must be used as a power source in the sea.

The receiver, the storage device, and the power control unit are provided in the waterproof case and mounted on the unmanned buoy for improved reception reliability and durability.

1, the receiver 10 includes a remote measurement receiving antenna 11, a GPS (Global Positioning System) receiver 12, a GPS A reception antenna 13, and a control signal reception antenna 15.

The data transmitted by the telemetry device is transmitted as an RF signal. The RF signal is a high-frequency signal (analog signal) used for wireless communication or the like.

The telemetry receiving antenna 11 receives the RF signal transmitted by the telemetry device. The GPS receiving antenna 13 receives position information and time information of the unmanned buoy from the GPS. The control signal receiving antenna 15 receives a control RF signal transmitted from the outside. The control RF signal is a signal for controlling whether or not the power control unit 60 is operated.

The storage device 20 includes a data receiving unit 30, a data storage unit 40, a control signal receiving unit 50, and a power control unit 60.

The data receiving unit 30 receives the RF signal received by the telemetry receiving antenna 11 and converts it into a PCM signal (digital signal).

The RF signal received by the telemetry receiving antenna 11 is applied to the input of the data receiving unit 30. The data receiving unit 30 demodulates the received RF signal and converts the demodulated RF signal into a PCM bit stream, and a data storage unit 40 to be described later stores the received PCM signal in the memory card 43.

2, the data receiving unit 30 includes an RF coupler 31 receiving an RF signal, a demodulator 33 demodulating the received RF signal to generate a telemetric PCM signal, And an RF power measurer 35 for measuring the RF power and transmitting it to the data storage unit 40.

3, the data storage unit 40 includes a frame extraction control unit 41, a memory card 43, and a network interface 45. [ The frame extraction control unit 41 extracts a telemetry frame from the PCM bitstream using the frame synchronization pattern and stores it in the memory card 43.

When the transmission signal of the remote measurement device of the flight is not received, an unnecessary signal is outputted from the receiver. In the case of storing all the unnecessary signals, the capacity of the memory card 43 must be very large. In order to solve this problem, the data receiving unit 30 transmits the received signal strength of the received RF signal to the data storage unit 40, and the frame extracting control unit 41 determines whether to store the received signal intensity value .

To this end, the frame extraction control unit 41 may extract a telemetry frame from the PCM signal and determine whether to store the telemetry frame based on the received signal strength of the RF signal, and store the telemetry frame.

For example, the frame extraction controller 41 may maintain the standby mode if the received signal strength value of the RF signal is less than or equal to X, and may switch to the normal operation mode if the received signal intensity value exceeds X, thereby storing the telemetry frame.

Alternatively, the frame extraction control may extract a telemetry frame from the PCM signal and store the telemetry frame only after the telemetry frame synchronization has been received more than Y consecutive times.

When the frame extracting control unit 41 stores a file in the memory card 43, the file name may be generated based on the time received from the GPS, and may be divided and stored in a size smaller than a predetermined size.

For example, the frame extraction control unit may generate a file name based on the time received from the GPS and divide and store the PCM signal in units of Z minutes.

The frame extraction control unit may include a mode for storing only a telemetry frame having normal frame synchronization and a mode for storing all telemetry frame synchronization.

The network interface 45 transmits the telemetry frame to the outside. The remote measurement frame extracted through the network interface 45 may be transmitted to the outside in order to monitor the status of the remote measurement receiving system. Here, the outside may correspond to a terrestrial telemetry station. The network interface 45 can transmit the telemetry frame to the outside via the Ethernet output (using the network communication network).

Meanwhile, the data receiving unit 30 converts the received RF signal into a PCM signal in the form of a synchronous distributed frame, and rearranges the synchronous distributed frame of the PCM signal into a synchronous aligned frame so that the synchronous signal is continuous.

In the case of the high-speed telemetry device, the frame is transmitted in a frame in which the synchronization is dispersed in order to minimize the delay from the measurement time to the transmission time. In order to use a general telemetry reception data analysis program, the frame synchronization is extracted, and the frames are rearranged and stored in the form of a synchronized alignment frame.

That is, as shown in FIG. 4, the synchronous distributed frame received by the RF signal is converted into a synchronous distributed frame of the PCM signal, and then the synchronous distributed frame is rearranged into the synchronous aligned frame of the PCM signal.

The synchronous distribution frame includes a plurality of distributed synchronization fields FS1 ... F8, a plurality of distributed data fields Discrete1 ... Discrete16, and a plurality of distributed count fields FC1 ... FC8 , And the reordered synchronous alignment frame is arranged with a plurality of synchronization fields, a count field, and a data field in accordance with the number of bits.

As shown in FIG. 5, a frame rearrangement is performed by applying a PCM bitstream to a shift register having a length of two frames, shifting bits by bit, and collecting bit values at scattered positions and comparing the bit values with an agreed frame synchronization pattern. When a frame synchronizing pattern is detected, a synchronization detecting signal is generated. At this time, frames are rearranged using the data stored in the buffer 2 and then stored.

The power control unit 60 receives power from the battery 70 and supplies power to the data receiving unit 30 and the data storage unit 40 and controls the power according to a control signal input to the control signal receiving unit 50.

Due to the nature of the flight test, a remote telemetry system may be installed on the ocean for long periods of time. In this case, the use time may be limited due to the capacity of the battery. To solve this problem, the power control unit 60 receives a control signal transmitted from the outside and controls whether or not the data receiving unit 30 and the data storage unit 40 are operated can do.

Best Mode for Carrying Out the Invention The present invention has been described with reference to the drawings and the specification. Although specific terms are used herein, they are used for the purpose of describing the present invention only and are not used to limit the scope of the present invention described in the meaning of the claims or the claims. Therefore, it is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Receiver 11: Remote measurement receiving antenna
13: GPS receiving antenna 15: Control signal receiving antenna
20: Storage device 30: Data receiving unit
31: RF coupler 33: Demodulator
35: RF power measurer 40: Data storage unit
41: frame extraction control section 43: memory card
45: network interface 50: control signal receiver
60: Power control unit 70: Battery

Claims (14)

A receiver mounted on an unmanned buoy at sea for receiving data transmitted by a remote measurement device of a vehicle;
A storage for storing data received by the receiver; And
A power controller for supplying power to the storage device; / RTI >
The storage device detects a distributed frame synchronization pattern from the data received by the receiver, extracts a telemetry frame based on the synchronization pattern, and reorders and stores the telemetry frames so that a synchronization pattern is continuous The remote measurement receiving system. The method according to claim 1,
Wherein the receiver and the storage device are maintained in the standby mode when the received signal strength is X or less, and are switched to the normal operation mode when the received signal strength is X or more. The method according to claim 1,
The storage device
And stores the data after the synchronization signal of the frame is continuously received Y times or more. The method according to claim 1,
The storage device
A mode in which only the frame whose frame synchronization is normal is stored; And
And a mode for storing all of the frame synchronizations. The method according to claim 1,
The storage device
A function of generating a file name after reading the time of the internal timer, and dividing and storing the file name in units of Z minutes. The method of claim 5,
Wherein the internal timer is a GPS time synchronization. The method according to claim 1,
Wherein the power control unit is capable of ON / OFF control by a remote control at a remote location. The method according to claim 1,
Wherein the receiver, the storage device, and the power control unit are installed in the waterproof case and then mounted on the unmanned buoy at sea. delete delete delete delete delete delete

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