CN101860381A - Ship automatic identification system slipway with intelligent transmission power regulation - Google Patents
Ship automatic identification system slipway with intelligent transmission power regulation Download PDFInfo
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- CN101860381A CN101860381A CN201010192228A CN201010192228A CN101860381A CN 101860381 A CN101860381 A CN 101860381A CN 201010192228 A CN201010192228 A CN 201010192228A CN 201010192228 A CN201010192228 A CN 201010192228A CN 101860381 A CN101860381 A CN 101860381A
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Abstract
The invention relates to a ship automatic identification system slipway with intelligent transmission power regulation, which comprises a processor, a modem, a signal noise machine and an antenna, wherein a signal received by the antenna passes through the signal noise machine and the modem in turn to be output into the processor to be processed; the output signal processed by the processor is transmitted out through the antenna after passing through the modem and the signal noise machine in turn; and the slipway also comprises a power control circuit used for regulating the transmission power of the antenna, and the processor regulates the transmission power of the antenna through the power control circuit. Compared with the prior art, the slipway has an additional power control function on the basis of the functions of the AIS slipway, realizes the automatic regulation of the AIS transmission power and strengthens the protection of an AIS communication network.
Description
Technical field
The radio system that the present invention relates to use on the boats and ships, the automatic recognition system building berth that uses on the special boats and ships.
Background technology
Ship automatic identification system (AIS) is the digital transmission system that works on the VHF very high frequency band, by mutual newspaper orientation, sail information etc., realize the function that collision prevention is reported to the police, it is to ensureing that navigation safety has crucial effects, and its exchanges data is much better than radar system.International Maritime pact regulation is all answered installation system greater than 500 tons boats and ships.
The AIS system comprises base station, A level building berth and three staples of B level building berth.The base station is a communication Consultation Center for setting up on the bank; A level building berth mainly assembles ship more than 500 tons, and B level building berth then is 500 tons of following small boat.What particularly point out is, the base station is not a necessary element, do not having under the situation of base station, but also operate as normal of B rank ship and A rank ship.The AIS communication system only has two frequencies, 87B (161.975MHZ) and 88B (162.025MHZ) adopt the mode of time division multiple access to work, and the time that is about to three minutes is divided into 2250 periods, each period is a communication channel, and ship and base station selected certain several period send the information of oneself.
The structure of spot ship automatic recognition system building berth as shown in Figure 1, it comprises processor, modulator-demodulator, noise machine, antenna; The signal that antenna receives input processor processing behind noise machine, modulator-demodulator successively, the signal after the processor processing outwards sends with onesize power by antenna behind modulator-demodulator, noise machine successively.
Through years of development, the AIS system moves towards the inland river by the sea.During used in the inland river, maximum change was that radio environment is complicated more, its former because:
(1) Qu Zhe navigation channel, the height above sea level drop on bank brings to radio propagation and to block.
(2) a large amount of ships in harbour in the short time bring bigger pressure for comparatively narrow AIS channel.
(3) the wireless interference in bank.
Simultaneously, inland river AIS as a kind of regulatory measure, in order to the navigation of management ship, is added up boats and ships flow etc. by more and more.Therefore, adopt existing AIS under complicated radio environments such as inland river, antenna outwards sends with onesize power, and residing radio environment is worsened more, has reduced the guarantee performance of AIS.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of intelligence to regulate the ship automatic identification system building berth of transmitting power, it can dynamically adjust the transmitting power of AIS building berth, strengthens the protection of AIS communication network.
The present invention is adopted solution to be by the problem of the above-mentioned proposition of solution:
Intelligence is regulated the ship automatic identification system building berth of transmitting power, and it comprises processor, modulator-demodulator, noise machine, antenna; The signal that antenna receives input processor processing behind noise machine, modulator-demodulator successively, the output signal after the processor processing outwards sends by antenna behind modulator-demodulator, noise machine successively; It also comprises the power control circuit that is used to regulate the antenna transmitting power, and processor is regulated the transmitting power of antenna by power control circuit.
In the such scheme, the ship automatic identification system building berth also comprises the D/A change-over circuit, and the control signal of processor output is by D/A change-over circuit input power control circuit, and power control circuit is regulated the transmitting power of antenna.
Compared with prior art, the invention has the advantages that:
On the basis of existing AIS building berth, add control function of power, realization AIS transmitting power is adjusted automatically.
It can cover good busy legs such as harbour at base station signal, and processor reduces the transmitting power of antenna automatically by power control circuit, under the prerequisite that does not influence AIS collision prevention statistical function, has guaranteed the high efficiency of AIS link far away.
In the leg away from the harbour, base station, the transmitting power of the antenna that processor automatically improves by power control circuit can guarantee that long-range AIS base station can receive information smoothly.
It also is permission administrative department management AIS channel allocation and transmitting power, thereby the optimization that realizes the AIS data link creates conditions.
Description of drawings
Fig. 1 is the structured flowchart of spot ship automatic recognition system building berth
Fig. 2 is the structured flowchart of ship automatic identification system building berth embodiment of the present invention
Fig. 3 is ship automatic identification system building berth example structure figure of the present invention
Fig. 4 is the circuit theory diagrams of power control circuit
Fig. 5 is the voltage control circuit figure and the output waveform of pulse-width modulation D/A change-over circuit
Fig. 6 is the processor software flow chart
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail:
The present invention's intelligence is as shown in Figure 2 regulated the ship automatic identification system building berth embodiment of transmitting power, and it comprises processor, modulator-demodulator, noise machine, antenna, the power control circuit that is used to regulate the antenna transmitting power, D/A change-over circuit (DAC); The signal that antenna receives input processor processing behind noise machine, modulator-demodulator successively, the output signal after the processor processing outwards sends by antenna behind modulator-demodulator, noise machine successively; The control signal of processor output is by D/A change-over circuit input power control circuit, and power control circuit is regulated the transmitting power of antenna.
As shown in Figure 3, the annexation of processor MCU and modulator-demodulator CMX7042 is:
CDATA orders input, SCLK clock signal, CSN enable signal, RDATA return signal.
The annexation of modulator-demodulator and noise machine is:
The signal transmission unit branch: MOD1 modulation signal 1, MOD2 modulation signal 2, TXEN transmitter enable signal, PwrCTRL launches enable signal.
Signal receive section: IP1 received signal 1, RSSI1 received signal 1 respective channels field intensity, IP2 received signal 2, RSSI2 received signal 2 corresponding field intensity.
Processor is regulated by the DAC power controlling.
As shown in Figure 4, in the radio frequency power controlling circuit, radio-frequency (RF) power amplification bias voltage, decision transmitting power.The core processor D/A converting circuit, the control bias voltage has promptly been controlled transmitting power.With power control circuit RA07M1371M radio-frequency (RF) power amplification is example (U1 among the figure).Core processor U2, adopt DAC change-over circuit control U1, U2 adopts the digital communication circuit, perhaps pulse-width modulation circuit, under the support of DAC change-over circuit, the continuous linear direct voltage of controlled output, control U1 biased electrical presser feet, other annexations of U1 promptly form the variable transmit power circuit that is subject to processing device U2 control as usual.Other power amplification chip circuits can be with reference to this implementation.
As shown in Figure 5, be that the DAC biasing circuit is set up at the center with the microcontroller, be used to control the bias voltage microcontroller U2 pulse-width modulation pin U2-1 of U1, output waveform is shaped as direct voltage V through the LC shaping circuit, and the value of V is by the duty ratio decision of U2-1 square wave.
The embodiment of the invention can be set up the incidence relation in transmitting power and remote control commands, on-site wireless electrical environment, geographical position.Priority level is set to, administrative department instruction＞on-site wireless electrical environment＞geographical position.
Operation principle is as follows:
As shown in Figure 6, after processor entered operating state, at first each assembly of initialization was acquiescence with transmitting power.After receiving the positional information of ship, base station, receive the GPS positional information, judge near the main frame whether the base station is arranged.If base station distance is far away, then be set to high-power emission; If the base station is far away, then reenter ship, the base station state of receiving.Under high-power emission state, judge that more whether channel crowds, if channel is crowded, then enter the default transmit power rating; If channel is not crowded, then be re-set as default transmit power.
Claims (2)
1. intelligence is regulated the ship automatic identification system building berth of transmitting power, and it comprises processor, modulator-demodulator, noise machine, antenna; The signal that antenna receives input processor processing behind noise machine, modulator-demodulator successively, the output signal after the processor processing outwards sends by antenna behind modulator-demodulator, noise machine successively; It is characterized in that: it also comprises the power control circuit that is used to regulate the antenna transmitting power, and processor is regulated the transmitting power of antenna by power control circuit.
2. ship automatic identification system building berth as claimed in claim 1 is characterized in that: it also comprises the D/A change-over circuit, and the control signal of processor output is by D/A change-over circuit input power control circuit, and power control circuit is regulated the transmitting power of antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010192228A CN101860381A (en) | 2010-05-31 | 2010-05-31 | Ship automatic identification system slipway with intelligent transmission power regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010192228A CN101860381A (en) | 2010-05-31 | 2010-05-31 | Ship automatic identification system slipway with intelligent transmission power regulation |
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| CN101860381A true CN101860381A (en) | 2010-10-13 |
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| CN201010192228A Pending CN101860381A (en) | 2010-05-31 | 2010-05-31 | Ship automatic identification system slipway with intelligent transmission power regulation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701542A (en) * | 2013-12-25 | 2014-04-02 | 武汉理工大学 | Measuring device and method for AIS (automatic identification system) signal field intensity |
| CN104392584A (en) * | 2014-11-14 | 2015-03-04 | 天津七一二通信广播有限公司 | Emergency call watch equipment for offshore worker |
| CN106211294A (en) * | 2016-08-29 | 2016-12-07 | 深圳市夸克云电子信息技术有限公司 | A kind of AIS maritime search and rescue position indicating mark and show method for position |
| CN108400824A (en) * | 2017-02-07 | 2018-08-14 | 中兴通讯股份有限公司 | A kind of field strength regulation and control method, apparatus and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1348107A (en) * | 2000-10-09 | 2002-05-08 | 贵州以太科技信息产业有限责任公司 | Radio positioner |
| WO2010006646A1 (en) * | 2008-07-16 | 2010-01-21 | Signal Processing Devices Sweden Ab | Device and method for blocking-signal reduction |
-
2010
- 2010-05-31 CN CN201010192228A patent/CN101860381A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1348107A (en) * | 2000-10-09 | 2002-05-08 | 贵州以太科技信息产业有限责任公司 | Radio positioner |
| WO2010006646A1 (en) * | 2008-07-16 | 2010-01-21 | Signal Processing Devices Sweden Ab | Device and method for blocking-signal reduction |
Non-Patent Citations (2)
| Title |
|---|
| 《中国水运》 20060331 韩芝玲 船舶自动识别系统的体系结构及优缺点 第133-134页 1-2 第4卷, 第3期 * |
| 《中国海事》 20080831 韩伟 AIS(CLASSB)船台在应用中需要关注的问题 第34-37页 1-2 , 第8期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701542A (en) * | 2013-12-25 | 2014-04-02 | 武汉理工大学 | Measuring device and method for AIS (automatic identification system) signal field intensity |
| CN104392584A (en) * | 2014-11-14 | 2015-03-04 | 天津七一二通信广播有限公司 | Emergency call watch equipment for offshore worker |
| CN106211294A (en) * | 2016-08-29 | 2016-12-07 | 深圳市夸克云电子信息技术有限公司 | A kind of AIS maritime search and rescue position indicating mark and show method for position |
| CN106211294B (en) * | 2016-08-29 | 2023-09-01 | 深圳市夸克云电子信息技术有限公司 | AIS maritime search and rescue position indication mark and position indication method thereof |
| CN108400824A (en) * | 2017-02-07 | 2018-08-14 | 中兴通讯股份有限公司 | A kind of field strength regulation and control method, apparatus and system |
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Application publication date: 20101013 |