CN105572628A - AIS searching and rescuing position indicator equipment based on low-rail maritime satellite communication - Google Patents
AIS searching and rescuing position indicator equipment based on low-rail maritime satellite communication Download PDFInfo
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- CN105572628A CN105572628A CN201610049855.2A CN201610049855A CN105572628A CN 105572628 A CN105572628 A CN 105572628A CN 201610049855 A CN201610049855 A CN 201610049855A CN 105572628 A CN105572628 A CN 105572628A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/68—Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
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Abstract
The invention provides AIS searching and rescuing position indicator equipment based on low-rail maritime satellite communication. The AIS searching and rescuing position indicator equipment comprises the components of a positioning module which is based on a satellite positioning system and is used for converting positioning information that is transmitted from a satellite and supplies the converted positioning information to a microprocessor; the microprocessor which is used for transmitting a reinforced power transmitting command to an adjustable power transmitting unit in an AIS module; the AIS module which comprises an AIS signal generating unit, an adjustable power transmitting unit and an AIS antenna, wherein the AIS signal generating unit is used for transmitting the AIS signal which is received by a low-rail maritime satellite by means of a reinforced transmitting power when the reinforced power transmitting command is received, and otherwise, the adjustable power transmitting unit transmits the AIS signal by means of a preset transmitting power, furthermore the reinforced transmitting power is higher than the preset transmitting power; and a power module. The AIS searching and rescuing position indicator equipment improves effective receiving possibility of the AIS signal to a relatively large extent, thereby improving rescue efficiency and rescue success rate.
Description
Technical field
The present invention relates to technical field of electronic equipment, particularly relate to a kind of AIS based on the communication of low orbit marine satellite and search and rescue position indicating mark equipment.
Background technology
After the disaster such as air crash, casualty, travel accident occurs, search out disaster affected people, distress personnel rapidly, and to the disaster affected people of surviving, distress personnel carries out Emergency Assistance, is vital for rescue work.
In rescue operations, usually can find disaster affected people by instrument and equipment; If the article such as disaster affected people or disaster-stricken ship are equipped with AIS (ShipborneAtomaticIdentificationSystem, ship automatic identification system) search and rescue position indicating mark equipment, be then very favorable to rescue work.
Inventor is realizing finding in process of the present invention: after disaster occurs, the height usual very limited (as being often no more than 1 meter) on the water surface is swum in due to the disaster affected people or article that are equipped with AIS search and rescue position indicating mark equipment, therefore, AIS search and rescue the ais signal that position indicating mark equipment is launched most of power all can absorb by earth surface (as the water surface); In the ideal situation, the transmission range of ais signal can not more than 10 nautical miles, and in actual applications, if bad weather or environment are extremely, then the transmission range of ais signal usually can at about 4 nautical miles.In ais signal coverage, if ais signal can not by boats and ships or the ais signal receiving equipment such as aircraft or base station receive, the possibility then obtaining rescuing can be greatly diminished, and not only may delay best rescue time, even also may jeopardize the life security of disaster affected people.
Because above-mentioned existing AIS searches and rescues the technical matters that position indicating mark equipment exists, the present inventor is based on being engaged in the practical experience and professional knowledge that this type of product design manufacture enriches for many years, and coordinate the utilization of scientific principle, actively in addition research and innovation, the AIS based on the communication of low orbit marine satellite to founding a kind of new structure searches and rescues position indicating mark equipment, the technical matters existing for existing AIS search and rescue position indicating mark equipment can be overcome to a certain extent, make it have more practicality.Through constantly research and design, through repeatedly studying sample and after improving, finally creating the present invention had practical value.
Summary of the invention
One object of the present invention is, in order to overcome the technical matters existing for existing AIS search and rescue position indicating mark equipment to a certain extent, and provide a kind of AIS based on the communication of low orbit marine satellite of new structure to search and rescue position indicating mark equipment, technical matters to be solved comprises: improve ais signal largely by the possibility effectively received, to improve rescue efficiency and rescue success ratio, thus improve existing AIS search and rescue position indicating mark equipment.
The object of the invention to solve the technical problems can adopt following technical scheme to realize.
A kind of AIS based on the communication of low orbit marine satellite proposed according to the present invention searches and rescues position indicating mark equipment, this equipment mainly comprises: based on the locating module of global position system, locating information for being come by satellite transmission carries out signal conversion processes, and the signal after process is supplied to microprocessor, microprocessor, for generating emergency message according to the locating information received, and message transmissions of crying for help is to ship automatic identification system ais signal generation unit, and strengthens power emission order according to predetermined transmitting strategy to the transmission of power-adjustable transmitter unit, AIS module, comprise: ais signal generation unit, power-adjustable transmitter unit and AIS antenna, the emergency message that described ais signal generation unit is used for coming according to microprocessor transmission produces corresponding ais signal, described power-adjustable transmitter unit is used for when receiving the enhancing power emission order that microprocessor transmission comes, adopt and strengthen emissive power by described ais signal by alignment low orbit marine satellite transmitting in AIS days, otherwise, predetermined emissive power is adopted to be gone out by AIS antenna transmission by described ais signal, described enhancing emissive power is higher than predetermined emissive power, power module, each electric device of searching and rescuing in position indicating mark equipment for described AIS provides power resource.
Object of the present invention and solve its technical matters and can also be further achieved by the following technical measures.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, and wherein, described AIS searches and rescues position indicating mark equipment and also comprises: underwater sound inverting model, for producing acoustic signals under control of the microprocessor and outwards sending; Pressure transducer, for gathering pressure signal, and is supplied to microprocessor by the pressure signal collected; At the collection signal come according to pressure transducer transmission, when described microprocessor is also for judging that the current depth of water of described search and rescue position indicating mark equipment reaches the predetermined depth of water, control locating module and AIS module are in off working state, and control underwater sound inverting model generation acoustic signals, otherwise, control underwater sound inverting model and be in off working state, and according to predetermined time interval control that locating module and AIS module replace in running order.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, and wherein, the described locating module based on global position system comprises: satellite positioning antennas; GPS module, for being received the locating information of satellite transmission by ceramic antenna, and is carried out signal conversion processes by the locating information of reception, the signal after process is supplied to microprocessor.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, wherein, when the described locating module based on global position system is the satellite positioning communication module based on big-dipper satellite positioning system, described GPS module comprises: low noise amplifier, carry out amplification process for transmitting by satellite positioning antennas the radiofrequency signal come to big-dipper satellite, and be transferred to radio frequency unit; Radio frequency unit, radiofrequency signal for coming low noise amplifier transmission carries out frequency-conversion processing, and by the analog signal transmission after frequency-conversion processing to analog to digital converter, be modulated to radiofrequency signal to the simulating signal that analog to digital converter transmission comes, and by the radio signal transmission after modulation to prime amplifier; Analog to digital converter, simulating signal for radio frequency unit transmission being come is converted to digital signal, and by digital data transmission to baseband signal processing unit, the digital signal that baseband signal processing unit transmission comes is converted to simulating signal, and by the analog signal transmission after conversion to radio frequency unit; Baseband signal processing unit, carries out base band signal process for the digital signal come analog to digital converter transmission and is transferred to microprocessor, and the signal that microprocessor transmission comes is carried out base band signal process and is transferred to analog to digital converter; Prime amplifier, for transmitting next radiofrequency signal by satellite positioning antennas to Big Dipper satellite launch by radio frequency unit.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, and wherein, the described locating module based on global position system is single mode chip or multimode chip.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, wherein, described multimode chip comprises: at least one in the satellite positioning communication module based on big-dipper satellite positioning system, the locating module based on american global positioning system, the locating module based on Russian Glonass global position system and the locating module based on European Union's Galilean satellite positioning system.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, wherein, the signal of described microprocessor also for coming according to the locating module based on american global positioning system, the locating module based on Russian Glonass global position system or the locating module transmission based on European Union's Galilean satellite positioning system generates emergency message, and gives the satellite positioning communication module based on big-dipper satellite positioning system by emergency message transmissions.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, and wherein, the predetermined transmitting strategy in described microprocessor comprises: strengthen power emission order at interval of scheduled duration to power-adjustable transmitter unit transmission primaries.
Preferably, the aforesaid AIS based on the communication of low orbit marine satellite searches and rescues position indicating mark equipment, and wherein, described AIS antenna is VHF aerial.
By technique scheme, AIS based on the communication of low orbit marine satellite of the present invention searches and rescues position indicating mark equipment and at least has following advantages and beneficial effect: the present invention by arranging power-adjustable transmitter unit in AIS module, and the ais signal strengthening power emission and can be received by low orbit marine satellite is adopted by Microprocessor S3C44B0X power-adjustable transmitter unit, making AIS search and rescue the information such as the numbering of position indicating mark equipment and position can by AIS module transfer to low orbit marine satellite, then Back end data platform can be transferred to by low orbit marine satellite, improve the probability that ais signal is successfully received largely, it can thus be appreciated that technical scheme provided by the invention improves ais signal largely by the possibility effectively received, thus improve rescue efficiency and rescue success ratio, perfect existing AIS searches and rescues position indicating mark equipment.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the structural representation that the AIS based on the communication of low orbit marine satellite of the present invention searches and rescues position indicating mark equipment.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, the embodiment of position indicating mark equipment, structure, feature and effect thereof are searched and rescued to the AIS based on the communication of low orbit marine satellite proposed according to the present invention, is described in detail as follows.
The AIS based on the communication of low orbit marine satellite of the present embodiment searches and rescues the primary structure of position indicating mark equipment as shown in Figure 1.
In Fig. 1, the AIS based on the communication of low orbit marine satellite of the present embodiment searches and rescues position indicating mark equipment and comprises: based on locating module 100 (following abbreviation locating module 100), microprocessor 110, AIS module 120 and the power module 130 of global position system.Preferably, this AIS search and rescue position indicating mark equipment can also comprise: underwater sound inverting model 140 and pressure transducer 150.
Below the various piece of the AIS search and rescue position indicating mark equipment based on the communication of low orbit marine satellite is described in detail respectively.
Locating module 100 is connected with microprocessor 110 signal.Locating module 100 is mainly used in the positional information of the AIS search and rescue position indicating mark equipment obtaining its place, to realize active location, when locating module 100 has signal sending function, locating module 100 can also be used for the message (as AIS message and Big Dipper short message etc.) of the predetermined format of platform (as command centre or control center etc.) transmission to the back-end under the control of microprocessor 110.
Concrete, when locating module 100 is the satellite positioning communication module based on big-dipper satellite positioning system, an object lesson of the operation performed by locating module 100 is: based on big-dipper satellite positioning system satellite positioning communication module microprocessor 110 control under, receive the radiofrequency signal that big-dipper satellite positioning system (also can be called big-dipper satellite) transmission comes, and a series of process (as frequency-conversion processing and base band signal process etc.) is carried out to the radiofrequency signal received, then, by process after Signal transmissions to microprocessor 110; Based on big-dipper satellite positioning system satellite positioning communication module microprocessor 110 control under, the message with predetermined format is sent to Big Dipper global position system, this message sends to big-dipper satellite positioning system by the form of radiofrequency signal, usually includes destination address information, the numbering of AIS search and rescue position indicating mark equipment, the positional information of AIS search and rescue position indicating mark equipment and temporal information etc. in this message (as Big Dipper short message).Here temporal information can be the temporal information corresponding with positional information, i.e. the time of time information representation when AIS search and rescue position indicating mark equipment is in above-mentioned positional information.
Locating module of the present invention mainly comprises: satellite positioning antennas and GPS module, and when locating module is the satellite positioning communication module based on big-dipper satellite positioning system, an object lesson based on the structure of the satellite positioning communication module of big-dipper satellite positioning system is, should comprise based on the satellite positioning communication module of big-dipper satellite positioning system: low noise amplifier, analog to digital converter, baseband signal processing unit, radio frequency unit, prime amplifier and satellite positioning antennas, wherein, the input end of low noise amplifier is connected with satellite positioning antennas, the output terminal of low noise amplifier is connected with the receiving cable input end of radio frequency unit, the input end of the receiving cable output terminal of radio frequency unit and the transmission channel of radio frequency unit is connected with analog to digital converter respectively, analog to digital converter is connected with baseband signal processing unit, baseband signal processing unit is connected with microprocessor, the output terminal of the transmission channel of radio frequency unit is connected with the input end of prime amplifier, the output terminal of prime amplifier is connected with satellite positioning antennas, and this satellite positioning antennas can be ceramic antenna.
The satellite positioning communication module based on big-dipper satellite positioning system of the present embodiment is under the control of microprocessor 110, by the radiofrequency signal that satellite positioning antennas reception big-dipper satellite positioning system is sent, first radiofrequency signal is being transferred to the receiving cable of radio frequency unit after low noise amplifier carries out amplifying process to it, frequency-conversion processing is carried out to amplifying the radiofrequency signal after processing by the receiving cable of radio frequency unit, signal after frequency-conversion processing transfers to analog to digital converter from the receiving cable of radio frequency unit, analog to digital converter is transferred to baseband signal processing unit after the signal after this frequency-conversion processing is converted to digital signal, baseband signal processing unit carries out corresponding base band signal process to the digital signal received, and by the Signal transmissions after base band signal process to microprocessor 110.
Microprocessor 110 can according to the current location information of the position indicating mark equipment of searching and rescuing the signal acquisition AIS after base band signal process received, and, microprocessor 110 can produce according to concrete demand and include destination address information, AIS search and rescue position indicating mark equipment numbering, the message of the contents such as the positional information of AIS search and rescue position indicating mark equipment and current time information, microprocessor 110 by this message transmissions to baseband signal processing unit, and be transferred to analog to digital converter after carrying out corresponding base band signal process by baseband signal processing unit, the transmission channel of radio frequency unit is transferred to after the signal received being converted to simulating signal by analog to digital converter, afterwards, prime amplifier is transferred to after frequency-conversion processing being carried out to the simulating signal received by the transmission channel of radio frequency unit, prime amplifier carries out amplification process to radiofrequency signal after the frequency-conversion processing received, and the radiofrequency signal of amplifying after process is launched by satellite positioning antennas.Big-dipper satellite positioning system receive to search and rescue from AIS position indicating mark equipment based on the message of radiofrequency signal after, according to the destination address information of carrying in this message, this message can be sent to corresponding rear end platform, as this message is sent to command centre or rescue center etc.
Locating module 100 in the present embodiment can show as the form (as this chip only has big-dipper satellite positioning function) of single mode chip, also the form of multimode chip can be shown as (as this chip not only has big-dipper satellite positioning function, also there is the satellite positioning functions of other types), if this multimode chip is except including the satellite positioning communication module based on big-dipper satellite positioning system, also include: based on the locating module of american global positioning system, at least one in locating module based on Russian Glonass global position system and the locating module based on European Union's Galilean satellite positioning system, such as in actual applications, this multimode chip can comprise simultaneously: the locating module 100 based on big-dipper satellite positioning system, the locating module based on american global positioning system, based on the locating module of Russian Glonass global position system and the locating module based on European Union's Galilean satellite positioning system.
It should be noted that, when locating module 100 shows as multimode chip form, microprocessor 110 control satellite positioning communication module based on big-dipper satellite positioning system to Big Dipper global position system send AIS in the message (as Big Dipper short message) with predetermined format to search and rescue the positional information of position indicating mark equipment and temporal information can be orientation and communication module based on big-dipper satellite positioning system, based on the locating module of american global positioning system, the positional information that any one locating module in locating module based on Russian Glonass global position system and the locating module based on European Union's Galilean satellite positioning system obtains and temporal information.
AIS module 120 is connected with microprocessor 110.AIS module 120 is mainly used under the control of microprocessor 110, launching ais signal with normal transmission power or launching ais signal to strengthen emissive power, and AIS module 120 can also be used under the control of microprocessor 110, receive other equipment and launch the ais signal of coming.Above-mentioned predetermined emissive power can be specially the predetermined emissive power of default setting in AIS module 120, the predetermined emissive power etc. that also can be configured for microprocessor 110 pairs of AIS modules 120, and enhancing emissive power is greater than predetermined emissive power, if predetermined emissive power is 2W, and to strengthen emissive power be 4.5-5.5W (the concrete value strengthening emissive power normally can receive AIS message be as the criterion to realize low orbit marine satellite).
Concrete, an object lesson of the operation performed by AIS module 120 is: AIS module 120 is under microprocessor 110 controls, ais signal snoop-operations can be started, when AIS module 120 does not listen to the ais signal of other any equipment transmittings within the schedule time, microprocessor 110 control AIS module 120 is in the state of quitting work (i.e. off working state); And when AIS module 120 listens to the ais signal of other equipment transmitting within the schedule time, AIS module 120 notifies microprocessor 110, and it receives ais signal (as the ais signal received is transferred to microprocessor 110 etc.), microprocessor 110 control AIS module 120 launches ais signal with normal transmission power (namely asks the ais signal rescued, implements corresponding rescue measure after receiving ais signal to make other equipment.The ais signal that AIS module 120 is launched can include the current location information that AIS searches and rescues position indicating mark equipment, and this current location information can be obtained by the satellite positioning communication module based on big-dipper satellite positioning system by microprocessor 110.
In addition, the first five position that the ais signal that AIS module 120 is launched can be specially MMSI (MaritimeMobileServiceIdentify, Waterborne movable communication business identification code) is AIS message 1 and the AIS message 14 of 97298 (as 97298XXXX).
AIS module 120 in the present embodiment mainly comprises: ais signal generation unit 121, power-adjustable transmitter unit 122, AIS antenna 123 and ais signal receiving element 124; Power-adjustable transmitter unit 122 wherein and ais signal receiving element 124 are connected respectively with AIS antenna 123, and ais signal generation unit 121, power-adjustable transmitter unit 122 and ais signal receiving element 124 are connected respectively with microprocessor 110.
Ais signal generation unit 121 is mainly used in transmitting according to microprocessor 110 the emergency message come and generates ais signal, as determined that at microprocessor 110 ais signal receiving element 124 receives the ais signal of other equipment transmitting, microprocessor 110 generates emergency message, and message transmissions of crying for help is to ais signal generation unit 121, thus the emergency message that ais signal generation unit 121 is come according to microprocessor 110 current transmission generates ais signal.
Power-adjustable transmitter unit 122 is mainly used in being launched by the ais signal that ais signal generation unit 121 generates by AIS antenna 123.Power-adjustable transmitter unit 122 is launched the emissive power that ais signal adopts and is controlled by microprocessor 110; Concrete, power-adjustable transmitter unit 122 is when receiving microprocessor 110 and transmitting the enhancing power emission order come, enhancing emissive power should be adopted to be launched by AIS antenna 123 by the ais signal of current for ais signal generation unit 121 generation, and adopt the ais signal strengthening emissive power transmitting usually successfully can be received by low orbit marine satellite, certainly, also can by the boats and ships in ais signal coverage or the ais signal receiving equipment such as aircraft or base station receive; Power-adjustable transmitter unit 122 is not when receiving microprocessor 110 and transmitting the enhancing power emission order come, usually predetermined emissive power can be adopted to be launched by AIS antenna 123 by the ais signal of current for ais signal generation unit 121 generation, the ais signal adopting predetermined emissive power to launch can by the boats and ships in ais signal coverage or the ais signal receiving equipment such as aircraft or base station receive.Microprocessor 110 can come to send to power-adjustable transmitter unit 122 to strengthen power emission order according to its local predetermined transmitting strategy stored, if predetermined transmitting strategy can be strengthen power emission order at interval of scheduled duration to power-adjustable transmitter unit 122 transmission primaries, thus microprocessor 110 at interval of scheduled duration (as 10 minutes) and when control AIS module 120 is in running order, can sends one to power-adjustable transmitter unit 122 and strengthens power emission order.This enhancing power emission order can be only a designator, also can include the concrete value strengthening emissive power.
AIS antenna 123 specifically can select VHF (VeryHighFrequency, very high frequency(VHF)) antenna, and power-adjustable transmitter unit 122 and ais signal receiving element 124 can share same AIS antenna 123 usually.
Ais signal receiving element 124 is mainly used under the control of microprocessor 110 in running order, to receive the ais signal that other equipment is launched, as microprocessor 110 is periodically in running order according to predetermined time interval triggering ais signal receiving element 124.
AIS module 120 of the present invention specifically can select the chip of SiliconlabsEZRadio series, is the chip of Si4463 as selected model.Because this chip has features such as using general ISM band, high integrated, low-power consumption, low data rate and high performance-price ratio, therefore, this chip to select the AIS for the present embodiment to search and rescue the aspects such as the reliable operation performance of position indicating mark equipment and cost of manufacture be very favorable.
Underwater sound inverting model 140 is connected with microprocessor 110.Underwater sound inverting model 140 is mainly used under the control of microprocessor 110, sends acoustic signals (as ultrasound wave).Underwater sound inverting model 140 in the present invention can utilize the magnetostrictive effect of crystal piezoelectric effect or piezoelectric ceramics effect or iron-nickel alloy to produce acoustic signals and to send.Acoustic signals can be propagated at a distance preferably in water, and rescue aid usually can to 60 meters, underwater and radius is AIS within the scope of 1000 meters searches and rescues position indicating mark equipment and accurately locate by the acoustic signals that receives.
Pressure transducer 150 is connected with microprocessor 110.Pressure transducer 150 is mainly used in gathering pressure information, and the pressure information collected is supplied to microprocessor 110.Pressure transducer 150 can be in signals collecting state or off working state under the control of microprocessor 110.Microprocessor 110 transmit according to pressure transducer 150 pressure information come determine AIS search and rescue position indicating mark equipment current be under water predetermined depth time, can not control AIS module 120 be in running order again, but control underwater sound inverting model 140 and send acoustic signals.
Microprocessor 110 is connected respectively with locating module 100, AIS module 120, underwater sound inverting model 140 and pressure transducer 150.Microprocessor 110 is core parts that AIS searches and rescues in position indicating mark equipment, microprocessor 110 is mainly used in the work coordinating locating module 100, AIS module 120, underwater sound inverting model 140 and pressure transducer 150, thus when saving AIS as much as possible and searching and rescuing the power resource of position indicating mark equipment, externally send distress signal in many ways.In addition, microprocessor 110 be also mainly used in control AIS module 120 whether adopt strengthen emissive power to low orbit marine satellite send ais signal.
In actual applications, locating module 100 coordinated by microprocessor 110, AIS module 120, the concrete example of of the work of underwater sound inverting model 140 and pressure transducer 150 is: be configured with AIS of the present invention search and rescue the ship of position indicating mark equipment impaired time, this AIS searches and rescues position indicating mark equipment and is in opening because meeting water, microprocessor 110 is in running order, microprocessor 110 controls the single mode chip or the operation of multimode chip execution active location that comprise locating module 100, microprocessor 110 receives single mode chip or multimode chip transmits the positioning signal from global position system of coming, according to the positioning signal that it is currently received, microprocessor 110 determines that AIS searches and rescues the current location information of position indicating mark equipment, microprocessor 110 utilizes destination address information, the AIS preset to search and rescue the numbering of position indicating mark equipment and the up-to-date current location information determined generates Big Dipper short message, can also comprise current time information in this Big Dipper short message, the microprocessor 110 satellite positioning communication module based on big-dipper satellite positioning system controlled in single mode chip or multimode chip sends this Big Dipper short message.Microprocessor 110 can after controlling to send multiple Big Dipper short message continuously based on the satellite positioning communication module of big-dipper satellite positioning system, control single mode chip or multimode chip are in off working state, and control AIS module 120 is in listening state (i.e. ais signal listening state), make AIS module 120 can receive the ais signal of external unit transmitting, whether microprocessor 110 can receive ais signal control AIS module 120 according to AIS module 120 and whether be in emission state; If microprocessor 110 is when receiving AIS module 120 and transmitting the ais signal come, control AIS module 120 is in emission state (i.e. ais signal emission state), make AIS module 120 outwards can launch ais signal, to make external unit, it is rescued; For another example microprocessor 110 does not receive the ais signal that AIS module 120 transmission comes within the scope of certain hour, then microprocessor 110 control AIS module 120 is in off working state, to save the power resource that AIS searches and rescues position indicating mark equipment; Microprocessor 110 can the collection signal (as intermittent starting pressure sensor 150 is in signals collecting state) of intermittent acquisition pressure transducer 150, and judge that AIS searches and rescues the current residing depth of water of position indicating mark equipment according to the collection signal that pressure transducer 150 current transmission comes, when judging that the current depth of water reaches the predetermined depth of water, it is in running order that microprocessor 110 controls underwater sound inverting model 140, thus make underwater sound inverting model 140 produce acoustic signals; When judging that the current depth of water does not reach the predetermined depth of water, microprocessor 110 can while control underwater sound inverting model 140 be in off working state, according to predetermined time interval control that orientation and communication module and AIS module 120 replace in running order, namely microprocessor 110 is while control locating module 100 is in running order, control AIS module 120 is in off working state, and while control locating module 100 is in off working state, control AIS module 120 is in running order.In addition, within the scope of certain hour, do not receive AIS module 120 at microprocessor 110 and transmit the ais signal of coming, and microprocessor 110 is when in running order according to predetermined time interval the N time control AIS module 120, microprocessor 110 can transmit to power-adjustable transmitter unit 122 and strengthen power emission order, power-adjustable transmitter unit 122 is adopted and strengthens emissive power to low orbit marine satellite transmitting ais signal.
To search and rescue in position indicating mark equipment each is all connected with electric device for power module 130 and AIS, so that each electric device of searching and rescuing in position indicating mark equipment for AIS provides power resource.Here connection can be directly connect, also can be indirectly connect, this example indirectly connected is: power module 130 is directly connected with the chip at microprocessor 110 place, other obtain power resource by being connected with microprocessor 110 place chip from the chip at microprocessor 110 place with electric device, and namely other are connected with power module 130 by the chip at microprocessor 110 place with electric device.
Power module 130 generally includes: at least one battery; Power module 130 optionally can also comprise at least one voltage stabilizing chip, and battery wherein can be lithium-manganese cell, and voltage stabilizing chip can provide a kind of power resource of specification.A concrete example, power module 130 comprises one piece of lithium-manganese cell, and wherein, lithium-manganese cell provides the supply voltage of 6V.
The present invention is by searching and rescuing in position indicating mark equipment the satellite positioning communication module arranged based on big-dipper satellite positioning system at the AIS based on the communication of low orbit marine satellite, AIS module 120, underwater sound inverting model 140 and pressure transducer 150, make the AIS based on the communication of low orbit marine satellite search and rescue position indicating mark equipment and under the control of microprocessor 110, not only by the satellite positioning communication module based on big-dipper satellite positioning system, AIS can be searched and rescued the information transmission such as the position of position indicating mark equipment to rear end platform (as command centre or control center etc.), by low orbit marine satellite, AIS can also be searched and rescued the information transmission such as the position of position indicating mark equipment to rear end platform, the present invention can realize there is the rescue aids such as boats and ships near AIS search and rescue position indicating mark equipment under the control of microprocessor 110, AIS module 120 is made to send ais signal, to ask rescue targetedly, in addition, the pressure acquisition signal that microprocessor 110 can also export based on pressure transducer 150 when judge AIS search and rescue position indicating mark equipment be under water certain depth, send acoustic signals for crying for help by controlling underwater sound inverting model 140, microprocessor 110 in the present invention, by the conservative control to locating module 100 (the satellite positioning communication module as based on big-dipper satellite positioning system), AIS module 120, underwater sound inverting model 140 and pressure transducer 150, can make AIS search and rescue position indicating mark equipment and improve the probability of effectively crying for help when having better duration performance, it can thus be appreciated that, AIS based on the communication of low orbit marine satellite of the present invention searches and rescues position indicating mark equipment can make rescue personnel know the particular location at AIS search and rescue position indicating mark equipment place early by multiple channel, and, improve ais signal largely by the possibility effectively received, thus improve rescue efficiency and rescue success ratio, perfect existing AIS searches and rescues position indicating mark equipment.
The above is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but, foregoing description is also not used to limit the present invention, any those skilled in the art are not departing within the scope of technical scheme of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, but every content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. the AIS based on the communication of low orbit marine satellite searches and rescues a position indicating mark equipment, and it is characterized in that, described search and rescue position indicating mark equipment comprises:
Based on the locating module of global position system, carry out signal conversion processes for the locating information come by satellite transmission, and the signal after process is supplied to microprocessor;
Microprocessor, for generating emergency message according to the locating information received, and message transmissions of crying for help is to ship automatic identification system ais signal generation unit, and strengthens power emission order according to predetermined transmitting strategy to the transmission of power-adjustable transmitter unit;
AIS module, comprise: ais signal generation unit, power-adjustable transmitter unit and AIS antenna, the emergency message that described ais signal generation unit is used for coming according to microprocessor transmission produces corresponding ais signal, described power-adjustable transmitter unit is used for when receiving the enhancing power emission order that microprocessor transmission comes, adopt and strengthen emissive power by described ais signal by alignment low orbit marine satellite transmitting in AIS days, otherwise, predetermined emissive power is adopted to be gone out by AIS antenna transmission by described ais signal, described enhancing emissive power is higher than predetermined emissive power,
Power module, each electric device of searching and rescuing in position indicating mark equipment for described AIS provides power resource.
2. AIS as claimed in claim 1 searches and rescues position indicating mark equipment, it is characterized in that, described AIS searches and rescues position indicating mark equipment and also comprises:
Underwater sound inverting model, for producing acoustic signals under control of the microprocessor and outwards sending;
Pressure transducer, for gathering pressure signal, and is supplied to microprocessor by the pressure signal collected;
At the collection signal come according to pressure transducer transmission, when described microprocessor is also for judging that the current depth of water of described search and rescue position indicating mark equipment reaches the predetermined depth of water, control locating module and AIS module are in off working state, and control underwater sound inverting model generation acoustic signals, otherwise, control underwater sound inverting model and be in off working state, and according to predetermined time interval control that locating module and AIS module replace in running order.
3. AIS as claimed in claim 1 searches and rescues position indicating mark equipment, and it is characterized in that, the described locating module based on global position system comprises:
Satellite positioning antennas;
GPS module, for being received the locating information of satellite transmission by ceramic antenna, and is carried out signal conversion processes by the locating information of reception, the signal after process is supplied to microprocessor.
4. AIS as claimed in claim 3 searches and rescues position indicating mark equipment, and it is characterized in that, when the described locating module based on global position system is the satellite positioning communication module based on big-dipper satellite positioning system, described GPS module comprises:
Low noise amplifier, carries out amplification process for transmitting by satellite positioning antennas the radiofrequency signal come to big-dipper satellite, and is transferred to radio frequency unit;
Radio frequency unit, radiofrequency signal for coming low noise amplifier transmission carries out frequency-conversion processing, and by the analog signal transmission after frequency-conversion processing to analog to digital converter, be modulated to radiofrequency signal to the simulating signal that analog to digital converter transmission comes, and by the radio signal transmission after modulation to prime amplifier;
Analog to digital converter, simulating signal for radio frequency unit transmission being come is converted to digital signal, and by digital data transmission to baseband signal processing unit, the digital signal that baseband signal processing unit transmission comes is converted to simulating signal, and by the analog signal transmission after conversion to radio frequency unit;
Baseband signal processing unit, carries out base band signal process for the digital signal come analog to digital converter transmission and is transferred to microprocessor, and the signal that microprocessor transmission comes is carried out base band signal process and is transferred to analog to digital converter;
Prime amplifier, for transmitting next radiofrequency signal by satellite positioning antennas to Big Dipper satellite launch by radio frequency unit.
5. AIS as claimed in claim 1 searches and rescues position indicating mark equipment, and it is characterized in that, the described locating module based on global position system is single mode chip or multimode chip.
6. AIS as claimed in claim 5 searches and rescues position indicating mark equipment, it is characterized in that, described multimode chip comprises: at least one in the satellite positioning communication module based on big-dipper satellite positioning system, the locating module based on american global positioning system, the locating module based on Russian Glonass global position system and the locating module based on European Union's Galilean satellite positioning system.
7. AIS as claimed in claim 6 searches and rescues position indicating mark equipment, it is characterized in that, the signal of described microprocessor also for coming according to the locating module based on american global positioning system, the locating module based on Russian Glonass global position system or the locating module transmission based on European Union's Galilean satellite positioning system generates emergency message, and gives the satellite positioning communication module based on big-dipper satellite positioning system by emergency message transmissions.
8. the AIS as described in claim arbitrary in claim 1 to 7 searches and rescues position indicating mark equipment, and it is characterized in that, the predetermined transmitting strategy in described microprocessor comprises: strengthen power emission order at interval of scheduled duration to power-adjustable transmitter unit transmission primaries.
9. the search and rescue terminal device as described in claim arbitrary in claim 1 to 7, is characterized in that, described AIS antenna is VHF aerial.
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