CN103456190A

CN103456190A - Ship collision avoidance device based on UWB

Info

Publication number: CN103456190A
Application number: CN2013103959650A
Authority: CN
Inventors: 蔡新梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-04
Filing date: 2013-09-04
Publication date: 2013-12-18

Abstract

The invention provides a ship collision avoidance device based on UWB. According to the UWB collision avoidance device, a signal source is connected with a processor through a UWB receiving and transmitting module and a channel, a displayer and an alarm apparatus are connected to the processor, and the processor is connected with an automatic control system. Due to the fact that the processor is combined with the UWB technology, the ship collision avoidance device based on the UWB has the advantages of being accurate and reliable in positioning, small in error, and timely in transmission. Automatic collision avoidance of ships is achieved due to the fact that the UWB signals have the advantages of being high in resolution ratio, long in transmission distance, good in anti-jamming capability and accurate in positioning. The ship collision avoidance device based on the UWB is suitable for being used for ship collision avoidance.

Description

Ship collision prevention device based on UWB

Technical field

The present invention is to provide positioning device for ship, specifically be based on the ship collision prevention device of UWB.

Background technology

At present, the ship collision prevention problem is important navigation research topic of 21 century, effectively reduces ship collision prevention, and ocean and river course environment, personal safety, navigation order are had to very large effect.Existing boats and ships range finding, direction-finding device and device for identifying are various navigator and gps satellite locating device, in conjunction with land commander and boats and ships, coordinate simultaneously, can realize ship collision prevention, become spot ship collision prevention technology.But also exist input information not in time, false alarm rate is high, antijamming capability is weak, communication spectrum is restricted defect, can't avoid that boats and ships are dangerous to be approached fully.In addition, boats and ships are tending towards maximization, rapid, and each Navigation in Navigable density increases year by year, and pre-ship collision prevention has become the major issue of restriction shipping business development.

Summary of the invention

In order to overcome the defect of spot ship anticollision device, the present invention proposes the ship collision prevention device based on UWB.Module, signal source module and Anneta module communication connection are received/sent out to this device by FPGA processor and UWB, solves the technical matters of ship collision prevention.

The scheme that technical solution problem of the present invention adopts is:

The UWB anticollision device forms:

Signal source is connected with processor with channel via UWB sending and receiving module, is connected with respectively display and alarm on processor, and processor also is connected with automatic control system.

Described processor is the FPGA processor.

The UWB receiver module:

Antenna is connected with data output end via low noise amplifier, wave filter, detuner, is connected with pulse producer on detuner.The signal of antenna reception carries out filtering after amplifier amplifies, and demodulation after filtering, export the signal of antenna reception as data.The effect of the pulse producer accessed on detuner is to supply with the detuner impulse source, formation wireless pulses carrier wave.

The UWB sending module:

Signal source is connected with antenna via modulator, and the signal source signal is sent by antenna through ovennodulation.The pulse producer accessed on modulator is for generation of pulse electromagnetic wave.

Good effect, the present invention combines with the UWB technology by processor, has that registration is reliable, error is little, transmit advantage timely.Utilize that the UWB signal has that resolution is high, long transmission distance, antijamming capability are strong, the characteristics of accurate positioning, realize the autonomous collision prevention of boats and ships.Suitable to the ship collision prevention application of installation.

The accompanying drawing explanation

Fig. 1 is composition diagram of the present invention

Fig. 2 is UWB receiver module block diagram of the present invention

Fig. 3 is UWB sending module block diagram of the present invention

Fig. 4 is process chart of the present invention.

Embodiment

Shown in Fig. 1, the UWB anticollision device forms:

Described processor is the FPGA processor.

Shown in Fig. 2, the UWB receiver module:

Shown in Fig. 3, the UWB sending module:

Shown in Fig. 4, the UWB anticollision device course of work:

The UWB anticollision device powers on, and starts, through system initialization, supply with data acquisition and carry out the computing judgement, when two ship distances surpass safe range, report to the police and drive the Ship brake system, in the time not surpassing safe distance, show two ship distances, travel speed and travel direction, when timer is greater than 50 milliseconds, produces signal and turn back to data acquisition system (DAS), the Resurvey data, when timer is less than 50 milliseconds, produces signal and turn back to the computing deterministic process.

Principle of work of the present invention:

Processor of the present invention is the FPGA processor that is applied to the UWB radio communication, and front end is that UWB receives/send out module, by the signal received, gives central processing unit, and processor institute photos and sending messages can be sent by the UWB sending module.The major function of device is completed by the FPGA processor.Wherein, it is key of the present invention that UWB receives/send out module, for processor provides signal source, thereby make main processing block obtain effective sampled signal simultaneously, calculates distance, judges target and realize reporting to the police.This device can send control signal by processor, drives automaton to realize automatic Collision Avoidance simultaneously.

1. signal source module design

Known to the definition of UWB according to FCC:

In formula:

Figure 2013103959650100002DEST_PATH_IMAGE002

,

FH and fL are respectively power corresponding upper limiting frequency and lower frequency limit while than peak power, descending 10 dB; F0 is carrier frequency.Now, signal bandwidth is at least 500 MHz.The frequency range that FCC regulation UWB is used is 3.1-10.6 GHz, and as can be seen here, this ratio of pulse length to the total cycle length tradition pulse is much narrow, and in this device, signal source adopts Gaussian pulse train:

Gauss pulse:

Gaussian pulse train:

Figure 2013103959650100002DEST_PATH_IMAGE004

Pulse height A=5, pulse width factor-alpha=109, standard deviation sigma=0.2, pulse repetition time T=10-6s, can meet the demands.

2.UWB receive/send out module

At receiving end, the signal that antenna obtains is processed by matched filtering after low noise amplifier amplifies, then recovers original information through demodulator circuit.The transmitting terminal of signal, the useful information obtained from controller is modulated the applicable UWB signal of generation through modulator and is sent by antenna.

PPM(Pulse Position Modulation), PPM utilizes the relative position of pulse to carry out a kind of modulation system of transmission of information, according to data symbol gating pulse position, does not need to carry out the control of pulse height and polarity.

3. antenna

Input impedance and phase center thereof that the design of UWB antenna meets antenna are consistent on the main frequency band of pulse energy distribution, prove conclusively effectively transmitting and receiving of signal.Select printed dipole antenna, its high sensitivity obtains by effective signal integration and high detection efficiency.When improve improving resolution, require sampling pulse width narrow, be 6 powers of 10 3 powers to 10 of PRI, 5ps is to 5ns.

4. processor

Processor is processed the UWB signal collected, found range, judged identification and reports to the police and process.Invention adopts the high-density digital signal processor StratixIII device of altera corp.

Characteristics of the present invention:

1, realize that on the FPGA processor PPM modulation-demodulation device combines, improve the work efficiency of PPM modulation-demodulation device.

2, the UWB antenna adopts printed dipole antenna, can reflected signal is in addition average, and can effectively suppress extraneous noise, and improve the signal to noise ratio (S/N ratio) of receiver, improve the stability of gain.

3, adopt the high-density digital signal processor of altera corp, can make this device adopt the PPM modulation technique, this processor has advantages of lowest power consumption in high density, high performance programmable logical device.

Claims

1. the ship collision prevention device based on UWB is characterized in that:

The UWB anticollision device forms: signal source is connected with processor with channel via UWB sending and receiving module, is connected with respectively display and alarm on processor, and processor also is connected with automatic control system;

The UWB receiver module: antenna is connected with data output end via low noise amplifier, wave filter, detuner, is connected with pulse producer on detuner;

The UWB sending module: signal source is connected with antenna via modulator, and the signal source signal is sent by antenna through ovennodulation;

Described processor is the FPGA processor.