CN203206221U - Distress signal reception module - Google Patents
Distress signal reception module Download PDFInfo
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- CN203206221U CN203206221U CN 201320086490 CN201320086490U CN203206221U CN 203206221 U CN203206221 U CN 203206221U CN 201320086490 CN201320086490 CN 201320086490 CN 201320086490 U CN201320086490 U CN 201320086490U CN 203206221 U CN203206221 U CN 203206221U
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Abstract
The utility model relates to a distress signal reception module and solves technical problems of great influence exerted by a serious environment and poor quality performance existing in the prior art. The distress signal emission module is technically characterized by comprising a voltage stabilization circuit used for power supply, an emission antenna, a reception module controller, a bus exchanger, a protector circuit, a filter circuit, a frequency mixing amplification circuit, a modulation demodulation circuit, a first reception module memory, a USB integrated circuit and a second reception module memory, wherein the reception module controller is connected with a processor module through the bus exchanger, the filter circuit is connected with an input end of the filter circuit through the protector circuit, an output end of the filter circuit is connected with an input end of the frequency mixing amplification circuit, a control end of the frequency mixing amplification circuit is connected with the reception module controller, an output end of the frequency mixing amplification circuit is connected with an input end of the modulation demodulation circuit, and an output end of the modulation demodulation circuit is connected with the reception module controller. The distress signal reception module has advantages of good quality and good performance.
Description
Technical field
This practicality relates to a kind of signal receiving module, particularly a kind of distress signal receiver module that is installed on the embedded search and rescue sea chart instrument.
Background technology
The requirement of searching and rescuing with sea chart instrument product is: Performance and quality need to meet the ECDIS standard of Domestic Maritime department issue, and it is small and exquisite portable that volume is wanted, and operate simple for usely, easily grasps, and is fit to the conveniently application of related personnel such as operation on the sea.GPS (Global Position System), marine special-purpose network, GIS-Geographic Information System, the Internet, the database synchronization technology one of searching and rescuing to be collected simultaneously on the product, the era development requirement can be adapted to.The product operation number of keys arranges moderate, operates comfortable, convenient, simple, easy to learn.Search and rescue and also will take into full account user's request and Information Technology Development trend with the sea chart instrument, site environment according to user's use, design is selected function and use field condition, is met the product configuration scheme of customer requirements, by tight, organically combination, realize the best ratio of performance to price, reduce user's fund cost, be convenient to the industry large-scale promotion and use, should have economical and practical value.But present search and rescue often can not reach such demand with sea chart instrument product, need to carry out improved place more, particularly there is receiving and transmitting signal, signal is encoded, when deciphering, can not be reached the problem that better output is arranged under more abominable operational environment.And distress signal receiver module fine or not most important therein.
China Patent Publication No.: CN102410835A, open day: on April 11st, 2012, the embedded electronic sea chart navigator design that a kind of internal navigation is used is disclosed, feature is to adopt 32 ARM nuclear chips W 90221X of Hua Bang company as processor, embedded controller and display unite two into one, complete autonomous embedded software hardware designs, global coordinates system, the landlocked charts of part such as built-in embedded China sea chart and Yangtze River waterway, Tai Lake have the functions such as boat location, auxiliary real-time navigation, odograph.But this technical scheme can only be carried out work in the place relatively preferably at operational environment, in case operational environment is tending towards badly, then can cause transmitted signal and signal transmission to have than macrolesion, causes the signal transmission unstable.
Practical content
This practical purpose is to solve the prior art receiving and transmitting signal, to signal encode, when deciphering, can not reach the problem that better output is arranged under more abominable operational environment, provide a kind of Performance and quality need to meet the ECDIS C class standard of Domestic Maritime department issue, it is small and exquisite portable that volume is wanted, operate simple for usely, easily grasp, be fit to operation on the sea etc. the related personnel is convenient use.GPS (Global Position System), marine special-purpose network, GIS-Geographic Information System, the Internet, the database synchronization technology one of searching and rescuing to be collected simultaneously on the product, the distress signal receiver module of era development requirement can be adapted to.
The technical scheme that its technical problem of this practicality solution adopts is: a kind of distress signal receiver module; be installed on the embedded search and rescue sea chart instrument; described distress signal receiver module comprises the voltage stabilizing power supplying circuit of the usefulness of powering; reception antenna; the receiver module controller; bus switch; the protector circuit; filter circuit; the mixing amplifying circuit; modulation-demodulation circuit; the receiver module first memory; USB integrated circuit and receiver module second memory; described receiver module controller is connected with processor module by bus switch; described filter circuit is connected with the input of described filter circuit by the protector circuit; the output of described filter circuit is connected with the input of mixing amplifying circuit; the control end of mixing amplifying circuit is connected with described receiver module controller; the output of described mixing amplifying circuit is connected with the input of modulation-demodulation circuit; the output of modulation-demodulation circuit is connected with the receiver module controller; described receiver module controller also is electrically connected with receiver module first memory and USB integrated circuit, and described receiver module second memory is electrically connected with described USB integrated circuit.The distress signal receiver module can receive the persons falling in water distress signal that a kind of persons falling in water location emitter sends.The distress signal receiver module adopts the digital selective call technology to receive the signal of launching from VHF, can perfectly receive between single or multiple persons falling in water distress signals and a plurality of distress signal and can not produce interference.Distress signal receiver module receive frequency be per minute once, and can guarantee accessible reception in the sea 10-15 nautical mile scope.Efficiently solve the interference problem that many signals receive, guarantee the fully reception of distress signal, the problem that signal is omitted can not occur.The distress signal receiver module is small and exquisite at volume, and is lightweight, low in energy consumption, powerful, peripheral circuit is few, and is easy to use, signal processing (amplification demodulation) is reliable and stable, output data readability, and data processing speed is fast, and antijamming capability is strong, can filter out noise signal, have high reliability, failure rate is extremely low, induction sensitivity is high, can in-20 ℃～+ 55 ℃ scopes, work, have USB, the RS-232 data way of output, be convenient to use.The distress signal receiver module first by its internal signal reception ﹠ disposal partly by the signal X (0) in the antenna reception atmosphere.Signal X (0) arrives a low pass filter and band pass filter and carries out preliminary filtering through protector.Receive signal X (0) through after the preliminary filtering, obtain removing the useful signal X (1) of clutter.Useful signal X (1) carries out radio frequency by a radio frequency amplifier and amplifies, and obtains signal X (2).By the first mixing unit, carry out mixing with signal Y (1) through the signal after the radio frequency amplification, obtain mixed frequency signal X (3).Signal Y (1) processes the signal that obtains with the signal Y (0) that microcontroller provides through buffering vibration and 2 amplifications.Mixed frequency signal X (3) obtains filtering signal X (4) after carrying out the filtering processing by monolithic crystal filter.Filtering signal X (4) is through an intermediate frequency amplifier and an intermediate frequency integrated circuit, processing signals intermediate-frequency section.Filtering signal X (4) is at first amplified by the intermediate-frequency section of intermediate frequency amplifier with filtering signal X (4), obtains signal X (5), by the intermediate frequency integrated circuit X (5) and signal Y (2) is carried out intermediate frequency process again, obtains signal X (6).Signal Y (2) resulting intermediate-freuqncy signal after to be signal Y (0) that microcontroller is provided through a phase-locked loop and 2 grades of amplifiers process.Signal X (6) amplifies demodulation through an audio frequency amplifier and a modulation /demodulation integrated circuit to signal X (6), obtains restituted signal X (7).Restituted signal X (7) is the discernible digital signal of microcontroller, and microcontroller reads, analyzes and calculates signal X (7), obtains the useful information among the primary signal X (0).Microcontroller is responsible for carrying out signal resolution, data output, data storage, signal processing desired signal, driving LED is provided.After microcontroller receives restituted signal X (7), by providing in advance algorithm that restituted signal X (7) is carried out analyzing and processing.After finishing, processing obtains the persons falling in water distress signals (emergency personnel positions information and identify label) that comprise among the primary signal X (0).Carry out signal demodulation (after the detection), data are deciphered, after the decoding, obtain receive data.After the microcontroller place obtained distress signals, the microcontroller judgement need to be stored into the persons falling in water distress signals memory or carry out transfer of data by the interface section as required.The interface section is as data input/output port and the power input mouth of distress signal receiver module.Embedded search and rescue sea chart instrument power supervisor provides power supply by the interface section to the distress signal receiver module.Power supply enters from the interface section, through providing electricity consumption for whole module after the voltage stabilizing of 4.7V pressurizer.The data input/output port of interface section comprises bus input and output and the input and output of USB formatted data.If microcontroller need to be exported receive data by bus, at first to export the emergency personal information to bus switch, then export data by bus switch to FPDP.The data input process is opposite with output procedure.If microcontroller need to be exported receive data by USB, at first to export the emergency personal information to the USB interface integrated circuit, then export data by the USB interface integrated circuit to FPDP.The data input process is opposite with output procedure.The data input/output port of distress signal receiver module provides the persons falling in water distress signals to the processor module of embedded search and rescue sea chart instrument.Embedded search and rescue sea chart instrument receives the distress signal that persons falling in water sends by the distress signal receiver module.After receiving the distress signal that single or multiple persons falling in water send, processor carries out analyzing and processing to the distress signal that obtains, and in conjunction with the digital chart data, and the real time position of persons falling in water is intuitively shown at digital chart.In conjunction with user's self-position data, persons falling in water position data and electronic chart data, the user can understand the distance between self-position and the persons falling in water position fast, makes things convenient for the user to carry out search and rescue.This Practical Performance and quality need to meet the ECDIS C class standard of Domestic Maritime department issue, and it is small and exquisite portable that volume is wanted, and operates simple for usely, easily grasp, and are fit to the convenient application of related personnel such as operation on the sea.
As preferably; described filter circuit comprises receiver module low pass filter, the first band pass filter, radio frequency amplifier, second band pass filter of successively series connection; the input of described receiver module low pass filter is connected with the output of protector circuit, and the output of described the second band pass filter is connected with the input of described mixing amplifying circuit.
As preferably, described mixing amplifying circuit comprises reference oscillation circuit, the first frequency mixer, monolithic crystal filter, intermediate frequency amplifier, the intermediate frequency integrated circuit, audio frequency amplifier, the first amplifier, the second amplifier, buffer amplifier, receive voltage controlled oscillator, phase-locked loop and temperature compensating crystal oscillator, the first input end of described the first frequency mixer is connected with the output of described filter circuit, the second input of the first frequency mixer is connected with the output of the first amplifier, described reception voltage controlled oscillator is connected by the input of buffer amplifier with the first amplifier, the input that receives voltage controlled oscillator is connected with the first output of phase-locked loop, the input of phase-locked loop is electrically connected with the receiver module controller, the crystal oscillator end of described phase-locked loop is connected with temperature compensating crystal oscillator, the second output of phase-locked loop is connected with described intermediate frequency integrated circuit control end by the second amplifier, the output of described the first frequency mixer is electrically connected by the input of monolithic crystal filter with the intermediate frequency integrated circuit, the benchmark input end of intermediate frequency integrated circuit is connected with reference oscillation circuit, and the output of intermediate frequency integrated circuit is electrically connected with modulation-demodulation circuit by audio frequency amplifier.
As preferably, be used for installing the embedded search and rescue sea chart instrument of distress signal receiver module, comprise electric power system and work system, described work system is electrically connected with described electric power system, described work system comprises processor module, several control buttons, interface module, display module, loudspeaker module, locating module, data storage and program storage, and described all control buttons, interface module, display module, loudspeaker module, locating module, data storage and program storage all are electrically connected with processor module.
As preferably, described electric power system comprises power management module, battery, secondary power system, DC charging module and USB charging module, and described battery, secondary power system, DC charging module and USB charging module all are electrically connected with described power management module.Embedded search and rescue sea chart instrument power supervisor provides working power for the distress signal transmitter module.Power supply enters module from the power input mouth.Input supply voltage is 8.2V, behind a 4.8V pressurizer, for whole modular circuit provides electricity consumption.The design of product has higher reliability, and according to user's actual operation requirements, the battery in the product design adopts lithium storage battery to have the long period power supply capacity, and simultaneously whole device housings adopts waterproof material.This embedded search and rescue sea chart instrument volume is small and exquisite, be easy to carry, shell adopts waterproof material, battery adopts large capacity lithium storage battery, guarantee that embedded search and rescue sea chart instrument can use in adverse circumstances, also can be applicable to simultaneously conditional electronic sea chart instrument in the environment that uses of inconvenience, greatly expanded the scope of application, increased practicality.
As preferably, described embedded search and rescue sea chart instrument also comprises the distress signal transmitter module, and described distress signal receiver module and distress signal transmitter module all are electrically connected with described processor module.
As preferably, described interface module comprises principal and subordinate USB interface, RS232 interface and TF card interface, described principal and subordinate USB interface, RS232 interface and TF card interface all are electrically connected with processor module, described display module comprises LCD and touch display screen module, described LCD and touch display screen module all are connected with processor module, and described locating module is GPS module or Big Dipper module.
As preferably, described distress signal transmitter module comprises the voltage stabilizing circuit of the usefulness of powering, transmitting antenna, connecting interface, frequency adjustment circuit, radio frequency amplifying circuit, feedback control circuit and low-pass filter circuit, the input of described frequency adjustment circuit is connected with processor module by connecting interface, the output of described frequency adjustment circuit is connected with the input of radio frequency amplifying circuit, the output of described radio frequency amplifying circuit is connected with transmitting antenna by low-pass filter circuit, the input of described feedback control circuit is connected with processor module by connecting interface, the feedback input end of described feedback control circuit is connected with low-pass filter circuit, and the control output end of feedback control circuit is connected with the control end of described radio frequency amplifying circuit.Distress signal transmitter module interface section is as data-in port and the power input mouth of distress signal transmitter module.Embedded search and rescue sea chart instrument power supervisor provides working power for the distress signal transmitter module.Power supply enters module from the power input mouth.Input supply voltage is 8.2V, behind a 4.8V pressurizer, for whole modular circuit provides electricity consumption.Embedded search and rescue sea chart instrument processor is opened distress signal transmitter module internal emission control switch by the distress signal emission interface, and the distress signal transmitter module is started working.Embedded search and rescue sea chart instrument processor provides distress signals data and the modulation signal that needs emission by distress signal transmitting data input port to the distress signal emission.After the distress signals data communication device is crossed the data-in port input, carry out signal frequency through frequency regulator and regulate.Modulation signal carries out the frequency modulating signal bias adjustment through the frequency departure adjuster after inputting by data-in port.Distress signals signal after the adjusting and modulation signal carry out signal modulation and frequency trim, obtain pre-sent signal y (0).Pre-sent signal y (0) passes through a 52MHz crystal oscillator, crystal oscillator starting of oscillation, the F(0 that transmits of generation 52MHz).F(0 transmits) through the oscillator starting of oscillation, produce a F(1 that transmits with periodic waveform).F(1 transmits) carry out amplification filtering through a buffer amplifier and high pass filter after, obtain the F(2 that transmits).F(2 transmits) carry out the radio frequency amplification by a plurality of radio frequency amplifiers, obtain the F(3 that transmits).F(3 transmits) carry out filtering through two low pass filters after, obtain the F(4 that transmits).Power sense circuit is to the F(4 that transmits) detect.If transmit F(4) signal amplification factor do not reach standard, then testing result is committed in the automatic phase control amplifier.The automatic phase control amplifier is regulated the multiplication factor of rear 2 radio frequency amplifiers according to testing result, make the F(4 that transmits) reach preassigned.Power sense circuit records the F(4 that transmits) reach preassigned, with signal F(4) again carry out the secondary low-pass filtering after, go out by antenna transmission.The distress signal transmitter module works in 156.800MHz distress call channel waterborne, adopt the MSK modulation system, integrated low pass filter, high pass filter and radio frequency amplifier, transmission range is a reliable high-performance wireless signal emission module up to 15 nautical miles.Under distress situation, send autonomous distress signals (comprising current location information and self identification that the GPS module obtains) by the distress signal emission to rescue center, can realize the function of initiatively crying for help.Rescue center receives the distress signal transmitter module, searches and rescues the distress signals that the sea chart instrument sends by analysis of built-in, and embedded search and rescue sea chart instrument user is positioned, and launches to search and rescue.The user can independently or allow embedded search and rescue sea chart instrument automatically send distress signal by Fixed Time Interval, is applicable to cry for help under the different situations.
As preferably, described low-pass filter circuit comprises the first low pass filter, the second low pass filter, the 3rd low pass filter and the 4th low pass filter of successively series connection, the input of the first low pass filter is connected with the output of radio frequency amplifying circuit, the output of the 4th low pass filter is connected with transmitting antenna, and the output of described the second low pass filter is connected with feedback control circuit as feedback output end; Described feedback control circuit comprises automatic control phase amplifier, emission control switch and power adjustments resistance, described automatic control phase amplifier is connected with voltage stabilizing circuit by power adjustments resistance, the input of described automatic control phase amplifier is connected with connecting interface by the emission control switch, and the feedback output end of described automatic control phase amplifier is connected with the feedback input end of radio frequency amplifying circuit; Described frequency adjustment circuit comprises the frequency trim module, frequency adjustment resistance, bias adjustment resistance, crystal oscillator, oscillator, send buffer amplifier and high pass filter, the output of described voltage stabilizing circuit is connected with the first input end of frequency trim module by frequency adjustment resistance, the modulation signal output of connecting interface is connected with the second input of frequency trim module by bias adjustment resistance, the output of frequency trim module passes through crystal oscillator successively, oscillator and transmission buffer amplifier are connected with high pass filter, and the output that described high pass filter connects is connected with the input of radio frequency amplifying circuit; Described radio frequency amplifying circuit comprises successively the first radio frequency amplifier of series connection, the second radio frequency amplifier, the 3rd radio frequency amplifier, the 4th radio frequency amplifier and the 5th radio frequency amplifier, the input of described the first radio frequency amplifier is connected with the output of frequency adjustment circuit, the output of described the 5th radio frequency amplifier is connected with the input of low-pass filter circuit, described the 4th radio frequency amplifier and the 5th radio frequency amplifier are the radio frequency amplifier with feedback interface, and the feedback interface of described the 4th radio frequency amplifier and the 5th radio frequency amplifier all is electrically connected with described feedback control circuit.
MSKMOD:msk in this specification is the data output valve (value that is used for output NEXT_bit, namely according to the value (0,1) of NEXT_bit, control single chip computer is exported analog value (0,1) to the outside), bitpos: corresponding bit position, bitpos (DAT): the DAT data of corresponding bit position, bitpos (MSK): the MSK data of corresponding bit position, buf[index]: the respective cache index-location values, index: frame length is judged parameter.
This practical substantial effect is: Performance and quality need to meet the ECDIS C class standard of Domestic Maritime department issue, and it is small and exquisite portable that volume is wanted, and operate simple for usely, easily grasps, and is fit to the convenient application of related personnel such as operation on the sea.GPS (Global Position System), marine special-purpose network, GIS-Geographic Information System, the Internet, the database synchronization technology one of searching and rescuing to be collected simultaneously on the product, the distress signal receiver module on the embedded search and rescue sea chart of being installed in of the era development requirement instrument can be adapted to.
Description of drawings
Fig. 1 is a kind of circuit block diagram of this practicality;
A kind of circuit block diagram of embedded search and rescue sea chart instrument in this practicality of Fig. 2;
Fig. 2 is a kind of circuit block diagram of the middle distress signal transmitter module of this practicality;
Fig. 4 is the flow chart of a kind of distress signal transmission method of this practicality;
Fig. 5 is this practical interpretation method flow process flow chart;
Fig. 6 is this practical coding method flow process flow chart.
Among the figure: 1, the control button, 2, interface module, 3, display module, 4, loudspeaker module, 5, locating module, 6, data storage, 7, program storage, 8, the distress signal receiver module, 9, the distress signal transmitter module, 10, processor module, 20, power management module, 21, battery, 22, secondary power system, 23, the DC charging module, 24, the USB charging module, 101, the receiver module low pass filter, 102, the first band pass filter, 103, radio frequency amplifier, 104, the second band pass filter, 105, the first frequency mixer, 106, monolithic crystal filter, 107, intermediate frequency amplifier, 108, the intermediate frequency integrated circuit, 109, audio frequency amplifier, 110, modulation-demodulation circuit, 111, the first amplifier, 112, buffer amplifier, 113, receive voltage controlled oscillator, 114, reference oscillation circuit, 115, the second amplifier, 116, phase-locked loop, 117, temperature compensating crystal oscillator, 120, the receiver module controller, 121, the USB integrated circuit, 122, the receiver module first memory, 123, the receiver module second memory, 124, bus switch, 201, the 4th low pass filter, 202, the 3rd low pass filter, 203, the second low pass filter, 204, the first low pass filter, 205, the 5th radio frequency amplifier, 206, the 4th radio frequency amplifier, 207, the 3rd radio frequency amplifier, 208, the second radio frequency amplifier, 209, the first radio frequency amplifier, 210, high pass filter, 211, send buffer amplifier, 212, oscillator, 213, crystal oscillator, 214, the frequency trim module, 215, automatic control phase amplifier, 216, the emission control switch, 217, voltage stabilizing circuit.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, this practical technical scheme is described in further detail.
Embodiment:
A kind of distress signal receiver module (referring to accompanying drawing 1) is installed on the embedded search and rescue sea chart instrument; the voltage stabilizing power supplying circuit that comprises the usefulness of powering; reception antenna; the receiver module controller 120 that is consisted of by single chip circuit; bus switch 124; the protector circuit; filter circuit; the mixing amplifying circuit; modulation-demodulation circuit; receiver module first memory 122; USB integrated circuit 121 and receiver module second memory 123; described receiver module controller is connected with processor module by bus switch; described filter circuit is connected with the input of described filter circuit by the protector circuit; the output of described filter circuit is connected with the input of mixing amplifying circuit; the control end of mixing amplifying circuit is connected with described receiver module controller; the output of described mixing amplifying circuit is connected with the input of modulation-demodulation circuit; the output of modulation-demodulation circuit 110 is connected with the receiver module controller; described receiver module controller also is electrically connected with receiver module first memory and USB integrated circuit, and described receiver module second memory is electrically connected with described USB integrated circuit.Described filter circuit comprises receiver module low pass filter 101, the first band pass filter 102, radio frequency amplifier 103, second band pass filter 104 of successively series connection; the input of described receiver module low pass filter is connected with the output of protector circuit, and the output of described the second band pass filter is connected with the input of described mixing amplifying circuit.Described mixing amplifying circuit comprises reference oscillation circuit 114, the first frequency mixer 105, monolithic crystal filter 106, intermediate frequency amplifier 107, intermediate frequency integrated circuit 108, audio frequency amplifier 109, the first amplifier 111, the second amplifier 115, buffer amplifier 112, receive voltage controlled oscillator 113, phase-locked loop 116 and temperature compensating crystal oscillator 117, the first input end of described the first frequency mixer is connected with the output of described filter circuit, the second input of the first frequency mixer is connected with the output of the first amplifier, described reception voltage controlled oscillator is connected by the input of buffer amplifier with the first amplifier, the input that receives voltage controlled oscillator is connected with the first output of phase-locked loop, the input of phase-locked loop is electrically connected with the receiver module controller, the crystal oscillator end of described phase-locked loop is connected with temperature compensating crystal oscillator, the second output of phase-locked loop is connected with described intermediate frequency integrated circuit control end by the second amplifier, the output of described the first frequency mixer is electrically connected by the input of monolithic crystal filter with the intermediate frequency integrated circuit, the benchmark input end of intermediate frequency integrated circuit is connected with reference oscillation circuit, and the output of intermediate frequency integrated circuit is electrically connected with modulation-demodulation circuit by audio frequency amplifier.
Described embedded search and rescue sea chart instrument (referring to accompanying drawing 2), comprise electric power system and work system, described work system is electrically connected with described electric power system, it is characterized in that: described work system comprises the processor module 10 that is made of single chip circuit, by the control key-press module that consists of of control button 1, interface module 2, display module 3, loudspeaker module 4, locating module 5, data storage 6 and program storage 7, described all control buttons, interface module, display module, loudspeaker module, locating module, data storage and program storage all are electrically connected with processor module.Described electric power system comprises power management module 20, battery 21, secondary power system 22, DC charging module 23 and USB charging module 24, and described battery, secondary power system, DC charging module and USB charging module all are electrically connected with described power management module.Described embedded search and rescue sea chart instrument also comprises distress signal receiver module 8 and distress signal transmitter module 9, and described distress signal receiver module and distress signal transmitter module all are electrically connected with described processor module.
Described distress signal transmitter module (referring to accompanying drawing 3) comprises the voltage stabilizing circuit 217 of the usefulness of powering, transmitting antenna, connecting interface, frequency adjustment circuit, radio frequency amplifying circuit, feedback control circuit and low-pass filter circuit, the input of described frequency adjustment circuit is connected with processor module by connecting interface, the output of described frequency adjustment circuit is connected with the input of radio frequency amplifying circuit, the output of described radio frequency amplifying circuit is connected with transmitting antenna by low-pass filter circuit, the input of described feedback control circuit is connected with processor module by connecting interface, the feedback input end of described feedback control circuit is connected with low-pass filter circuit, and the control output end of feedback control circuit is connected with the control end of described radio frequency amplifying circuit.Described low-pass filter circuit comprises the first low pass filter 204, the second low pass filter 203, the 3rd low pass filter 202 and the 4th low pass filter 201 of successively series connection, the input of the first low pass filter is connected with the output of radio frequency amplifying circuit, the output of the 4th low pass filter is connected with transmitting antenna, and the output of described the second low pass filter is connected with feedback control circuit as feedback output end; Described feedback control circuit comprises automatic control phase amplifier 215, emission control switch 216 and power adjustments resistance, described automatic control phase amplifier is connected with voltage stabilizing circuit by power adjustments resistance, the input of described automatic control phase amplifier is connected with connecting interface by the emission control switch, and the feedback output end of described automatic control phase amplifier is connected with the feedback input end of radio frequency amplifying circuit; Described frequency adjustment circuit comprises frequency trim module 214, frequency adjustment resistance, bias adjustment resistance, crystal oscillator 213, oscillator 212, send buffer amplifier 211 and high pass filter 210, the output of described voltage stabilizing circuit is connected with the first input end of frequency trim module by frequency adjustment resistance, the modulation signal output of connecting interface is connected with the second input of frequency trim module by bias adjustment resistance, the output of frequency trim module passes through crystal oscillator successively, oscillator and transmission buffer amplifier are connected with high pass filter, and the output that described high pass filter connects is connected with the input of radio frequency amplifying circuit; Described radio frequency amplifying circuit comprises successively the first radio frequency amplifier 209 of series connection, the second radio frequency amplifier 208, the 3rd radio frequency amplifier 207, the 4th radio frequency amplifier 206 and the 5th radio frequency amplifier 205, the input of described the first radio frequency amplifier is connected with the output of frequency adjustment circuit, the output of described the 5th radio frequency amplifier is connected with the input of low-pass filter circuit, described the 4th radio frequency amplifier and the 5th radio frequency amplifier are the radio frequency amplifier with feedback interface, and the feedback interface of described the 4th radio frequency amplifier and the 5th radio frequency amplifier all is electrically connected with described feedback control circuit.Described interface module comprises principal and subordinate USB interface, RS232 interface and TF card interface, described principal and subordinate USB interface, RS232 interface and TF card interface all are electrically connected with processor module, described display module comprises LCD and touch display screen module, described LCD and touch display screen module all are connected with processor module, and described locating module is GPS module or Big Dipper module.
During the distress signal transmission (referring to accompanying drawing 4), distress signal transmitter module interface section is as data-in port and the power input mouth of distress signal transmitter module.Embedded search and rescue sea chart instrument power supervisor provides working power for the distress signal transmitter module.Power supply enters module from the power input mouth.Input supply voltage is 8.2V, behind a 4.8V pressurizer, for whole modular circuit provides electricity consumption.Embedded search and rescue sea chart instrument processor is opened distress signal transmitter module internal emission control switch by the distress signal emission interface, and the distress signal transmitter module is started working.Embedded search and rescue sea chart instrument processor provides distress signals data and the modulation signal that needs emission by distress signal transmitting data input port to the distress signal emission.After the distress signals data communication device is crossed the data-in port input, carry out signal frequency through frequency regulator and regulate.Modulation signal carries out the frequency modulating signal bias adjustment through the frequency departure adjuster after inputting by data-in port.Distress signals signal after the adjusting and modulation signal carry out signal modulation and frequency trim, obtain pre-sent signal y (0).Pre-sent signal y (0) passes through a 52MHz crystal oscillator, crystal oscillator starting of oscillation, the F(0 that transmits of generation 52MHz).F(0 transmits) through the oscillator starting of oscillation, produce a F(1 that transmits with periodic waveform).F(1 transmits) carry out amplification filtering through a buffer amplifier and high pass filter after, obtain the F(2 that transmits).F(2 transmits) carry out the radio frequency amplification by a plurality of radio frequency amplifiers, obtain the F(3 that transmits).F(3 transmits) carry out filtering through two low pass filters after, obtain the F(4 that transmits).Power sense circuit is to the F(4 that transmits) detect.If transmit F(4) signal amplification factor do not reach standard, then testing result is committed in the automatic phase control amplifier.The automatic phase control amplifier is regulated the multiplication factor of rear 2 radio frequency amplifiers according to testing result, make the F(4 that transmits) reach preassigned.Power sense circuit records the F(4 that transmits) reach preassigned, with signal F(4) again carry out the secondary low-pass filtering after, go out by antenna transmission.The distress signal transmitter module works in 156.800MHz distress call channel waterborne, adopt the MSK modulation system, integrated low pass filter, high pass filter and radio frequency amplifier, transmission range is a reliable high-performance wireless signal emission module up to 15 nautical miles.Under distress situation, send autonomous distress signals (comprising current location information and self identification that the GPS module obtains) by the distress signal emission to rescue center, can realize the function of initiatively crying for help.Other embedded search and rescue sea chart instrument or rescue center receive the distress signal transmitter module, search and rescue the distress signals that the sea chart instrument sends by analysis of built-in, and embedded search and rescue sea chart instrument user is positioned, and launch to search and rescue.The user can independently or allow embedded search and rescue sea chart instrument automatically send distress signal by Fixed Time Interval, is applicable to cry for help under the different situations.
The distress signal receiver module first by its internal signal reception ﹠ disposal partly by the signal X (0) in the antenna reception atmosphere.Signal X (0) arrives a low pass filter and band pass filter and carries out preliminary filtering through protector.Receive signal X (0) through after the preliminary filtering, obtain removing the useful signal X (1) of clutter.Useful signal X (1) carries out radio frequency by a radio frequency amplifier and amplifies, and obtains signal X (2).By the first mixing unit, carry out mixing with signal Y (1) through the signal after the radio frequency amplification, obtain mixed frequency signal X (3).Signal Y (1) processes the signal that obtains with the signal Y (0) that microcontroller provides through buffering vibration and 2 amplifications.Mixed frequency signal X (3) obtains filtering signal X (4) after carrying out the filtering processing by monolithic crystal filter.Filtering signal X (4) is through an intermediate frequency amplifier and an intermediate frequency integrated circuit, processing signals intermediate-frequency section.Filtering signal X (4) is at first amplified by the intermediate-frequency section of intermediate frequency amplifier with filtering signal X (4), obtains signal X (5), by the intermediate frequency integrated circuit X (5) and signal Y (2) is carried out intermediate frequency process again, obtains signal X (6).Signal Y (2) resulting intermediate-freuqncy signal after to be signal Y (0) that microcontroller is provided through a phase-locked loop and 2 grades of amplifiers process.Signal X (6) amplifies demodulation through an audio frequency amplifier and a modulation /demodulation integrated circuit to signal X (6), obtains restituted signal X (7).Restituted signal X (7) is the discernible digital signal of microcontroller, and microcontroller reads, analyzes and calculates signal X (7), obtains the useful information among the primary signal X (0).Microcontroller is responsible for carrying out signal resolution, data output, data storage, signal processing desired signal, driving LED is provided.After microcontroller receives restituted signal X (7), by providing in advance algorithm that restituted signal X (7) is carried out analyzing and processing.After finishing, processing obtains the persons falling in water distress signals (emergency personnel positions information and identify label) that comprise among the primary signal X (0).Carry out signal demodulation (after the detection), data are deciphered, after the decoding, obtain receive data.After the microcontroller place obtained distress signals, the microcontroller judgement need to be stored into the persons falling in water distress signals memory or carry out transfer of data by the interface section as required.The interface section is as data input/output port and the power input mouth of distress signal receiver module.Embedded search and rescue sea chart instrument power supervisor provides power supply by the interface section to the distress signal receiver module.Power supply enters from the interface section, through providing electricity consumption for whole module after the voltage stabilizing of 4.7V pressurizer.The data input/output port of interface section comprises bus input and output and the input and output of USB formatted data.If microcontroller need to be exported receive data by bus, at first to export the emergency personal information to bus switch, then export data by bus switch to FPDP.The data input process is opposite with output procedure.If microcontroller need to be exported receive data by USB, at first to export the emergency personal information to the USB interface integrated circuit, then export data by the USB interface integrated circuit to FPDP.The data input process is opposite with output procedure.The data input/output port of distress signal receiver module provides the persons falling in water distress signals to the processor module of embedded search and rescue sea chart instrument.Embedded search and rescue sea chart instrument receives the distress signal that persons falling in water sends by the distress signal receiver module.After receiving the distress signal that single or multiple persons falling in water send, processor carries out analyzing and processing to the distress signal that obtains, and in conjunction with the digital chart data, and the real time position of persons falling in water is intuitively shown at digital chart.In conjunction with user's self-position data, persons falling in water position data and electronic chart data, the user can understand the distance between self-position and the persons falling in water position fast, makes things convenient for the user to carry out search and rescue.
Embedded search and rescue sea chart instrument may further comprise the steps in the search and rescue process:
Main step 1: the initialization of embedded search and rescue sea chart instrument, the built-in sea chart engine start of embedded search and rescue sea chart instrument;
Main step 2: start simultaneously and carry out positioning step, signal receiving step and control button interrupt scanning step;
Described positioning step comprises: at first start locating module, then obtain locator data, then processor module carries out data analysis, shows the current device position in conjunction with digital chart again, and afterwards redirect re-executes obtains the locator data step;
Described positioning step comprises: at first start the distress signal receiver module, then the distress signal receiver module is accepted the distress signal row decoding of going forward side by side, processor module carries out data analysis, shows the current device position in conjunction with digital chart again, and afterwards redirect re-executes accepts the distress signal step;
Control button interrupt scanning step comprises: at first the emergency of setting is continued to carry out interrupt scanning with control button, in case press control button, then start distress signal receiver module transmitter module, send self distress signal, and then the step that the emergency of setting is continued to carry out interrupt scanning with control button is carried out in redirect.
The decode procedure of a kind of distress signal receiver module of the present embodiment (referring to accompanying drawing 5) may further comprise the steps:
Decoding substep one: carry out that parameter-definition, initialization add, the butterfly parameter of comparison and selection is grand, definition Hamming distance amount parameter;
Decoding substep two: call and the Check and Inspection code data, with data output, then finish the decoding flow process if the preamble data in the check code data is invalid, if preamble data effectively then carry out decoding substep three;
Decoding substep three: judge whether complete end of data, if data integrity finishes then recalls, then with data output, finish to decipher flow process, otherwise enter substep four;
Decoding substep four: carry out byte displacement and calculate, record data length after byte displacement is calculated and finished;
Decoding substep five: the length of detection record data, if data length equals 0 then recall, then carry out decoding substep three, data length is non-zero else if, then re-executes decoding substep three.Described byte displacement is calculated and is comprised following substep:
Step 3 is calculated in displacement: the survivor path that record is nearest with receiving sequence;
Step 5 is calculated in displacement: the decoding second time that routine call sets is calculated, by next attitude tolerance of current metric calculation;
Step 6 is calculated in displacement: the survivor path that record is nearest with receiving sequence.
The cataloged procedure of described distress signal sending module (referring to accompanying drawing 6) may further comprise the steps:
Coding substep one: at first carry out the Data Modulation initialization, then remove interrupt source, judge that NEXT_bit is the occurrence of currency, if equal 0 then be 0 with the MOD assignment that the MSK mode is encoded, then select the subfunction of execution, if equal 1 then be 1 with the MOD assignment that the MSK mode is encoded, then select the coding subfunction of carrying out;
Coding substep two: according to selecting to carry out the coding subfunction;
Coding substep three: coding output, then interrupt returning.
Described coding subfunction comprises subfunction 0, subfunction 1, subfunction 2, subfunction 3, subfunction 4 and subfunction 5;
Subfunction 0: for interrupting return function;
Subfunction 1: set first the DAT encoded radio that then the transmission byte number sets BitPos, set again modulating data, carry out subfunction 2, then carry out and interrupt return function;
Subfunction 2: the DAT encoded radio of modulating data and BitPos is done and computing, if data are output as 1 then judge whether data output state value is 1, if data output state value is 1 then contraposition modulating data assignment 1, if data output state value is 0 then contraposition modulating data assignment 0, the DAT encoded radio of modulating data and BitPos is done and computing, if data are output as 0 then judge whether data output state value is 1, if data output state value is 1 then contraposition modulating data assignment 1, if data output state value is 0 then contraposition modulating data assignment 0; After position modulating data assignment finishes, with position modulating data and 0x80 do with computing after the value that draws as currency, be set as the BitPos value that the MSK mode is encoded, carry out afterwards subfunction 3, then execution interruption return function;
Subfunction 3: the BitPos value that position modulating data and MSK mode are encoded is done and computing, the value assignment that draws is to NEXT_Bit, the BitPos value moves to right one, the MSK mode encoded radio of BitPos is greater than 0x02, then carry out and interrupt return function, still carry out subfunction 3 when carrying out coding next time, and the MSK mode encoded radio of BitPos is less than or equal to 0x02, and then the DAT mode encoded radio with BitPos moves to right one, the DAT mode encoded radio of BitPos is not equal to 0x00, then carry out subfunction 2, then carry out and interrupt return function, the DAT mode encoded radio of BitPos equals 0x00, the transmission byte number, the transmission byte number is not equal to 0, sets the BitPos value of DAT coded system, sets modulating data, then subfunction 2 is carried out in redirect, the transmission byte number equals 0, sets the transmission frame number, sets the BitPos value of DAT coded system, the Index that fetch program sets, modulating data is set as Buf(Index), then carry out subfunction 4, carry out again afterwards and interrupt return function;
Subfunction 4: the DAT encoded radio of modulating data and BitPos is done and computing, if data are output as 1 then judge whether data output state value is 1, if data output state value is 1 then contraposition modulating data assignment 1, if data output state value is 0 then contraposition modulating data assignment 0, the DAT encoded radio of modulating data and BitPos is done and computing, if data are output as 0 then judge whether data output state value is 1, if data output state value is 1 then contraposition modulating data assignment 1, if data output state value is 0 then contraposition modulating data assignment 0; After position modulating data assignment finishes, with position modulating data and 0x80 do with computing after the value that draws as currency, be set as the BitPos value that the MSK mode is encoded, carry out afterwards subfunction 5, then execution interruption return function;
Subfunction 5: the BitPos value that position modulating data and MSK mode are encoded is done and computing, the value assignment that draws is to NEXT_Bit, the BitPos value moves to right one, the MSK mode encoded radio of BitPos is greater than 0x02, then carry out and interrupt return function, still carry out subfunction 5 next time when carrying out coding, if the MSK mode encoded radio of BitPos is less than or equal to 0x02, then the DAT mode encoded radio with BitPos moves to right one, the DAT mode encoded radio of BitPos is not equal to 0x00, then carry out subfunction 4, then carry out and interrupt return function, the DAT mode encoded radio of BitPos equals 0x00, set the DAT mode encoded radio of BitPos, the value of Index is carried out rearmounted from adding computing, the value of Index is set as buf(Index less than 21 with modulating data) value, then carry out subfunction 4, carry out afterwards again and interrupt return function, the Index value is more than or equal to 21, and the frame number of coded data is carried out rearmounted from subtracting computing, the frame number of coded data is not equal to 0 value with Index clear 0, modulating data is set as Buf(Index), then carry out subfunction 4, carry out again afterwards and interrupt return function, the frame number of coded data equals 0 and carries out subfunction 0, and then carries out the interruption return function.
Above-described embodiment is a kind of better scheme of this practicality, is not any pro forma restriction is done in this practicality, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (7)
1. distress signal receiver module; be installed on the embedded search and rescue sea chart instrument; it is characterized in that: described distress signal receiver module comprises the voltage stabilizing power supplying circuit of the usefulness of powering; reception antenna; the receiver module controller; bus switch; the protector circuit; filter circuit; the mixing amplifying circuit; modulation-demodulation circuit; the receiver module first memory; USB integrated circuit and receiver module second memory; described receiver module controller is connected with processor module by bus switch; described filter circuit is connected with the input of described filter circuit by the protector circuit; the output of described filter circuit is connected with the input of mixing amplifying circuit; the control end of mixing amplifying circuit is connected with described receiver module controller; the output of described mixing amplifying circuit is connected with the input of modulation-demodulation circuit; the output of modulation-demodulation circuit is connected with the receiver module controller; described receiver module controller also is electrically connected with receiver module first memory and USB integrated circuit, and described receiver module second memory is electrically connected with described USB integrated circuit.
2. distress signal receiver module according to claim 1; it is characterized in that: described filter circuit comprises receiver module low pass filter, the first band pass filter, radio frequency amplifier, second band pass filter of successively series connection; the input of described receiver module low pass filter is connected with the output of protector circuit, and the output of described the second band pass filter is connected with the input of described mixing amplifying circuit.
3. distress signal receiver module according to claim 1, it is characterized in that: described mixing amplifying circuit comprises reference oscillation circuit, the first frequency mixer, monolithic crystal filter, intermediate frequency amplifier, the intermediate frequency integrated circuit, audio frequency amplifier, the first amplifier, the second amplifier, buffer amplifier, receive voltage controlled oscillator, phase-locked loop and temperature compensating crystal oscillator, the first input end of described the first frequency mixer is connected with the output of described filter circuit, the second input of the first frequency mixer is connected with the output of the first amplifier, described reception voltage controlled oscillator is connected by the input of buffer amplifier with the first amplifier, the input that receives voltage controlled oscillator is connected with the first output of phase-locked loop, the input of phase-locked loop is electrically connected with the receiver module controller, the crystal oscillator end of described phase-locked loop is connected with temperature compensating crystal oscillator, the second output of phase-locked loop is connected with described intermediate frequency integrated circuit control end by the second amplifier, the output of described the first frequency mixer is electrically connected by the input of monolithic crystal filter with the intermediate frequency integrated circuit, the benchmark input end of intermediate frequency integrated circuit is connected with reference oscillation circuit, and the output of intermediate frequency integrated circuit is electrically connected with modulation-demodulation circuit by audio frequency amplifier.
4. distress signal receiver module according to claim 1 is characterized in that: the embedded search and rescue sea chart instrument that is used for installing the distress signal receiver module, comprise electric power system and work system, described work system is electrically connected with described electric power system, described work system comprises processor module, several control button, interface module, display module, loudspeaker module, locating module, data storage and program storage, described all control buttons, interface module, display module, loudspeaker module, locating module, data storage and program storage all are electrically connected with processor module.
5. distress signal receiver module according to claim 4, it is characterized in that: described electric power system comprises power management module, battery, secondary power system, DC charging module and USB charging module, and described battery, secondary power system, DC charging module and USB charging module all are electrically connected with described power management module.
6. distress signal receiver module according to claim 1, it is characterized in that: described embedded search and rescue sea chart instrument also comprises the distress signal transmitter module, and described distress signal receiver module and distress signal transmitter module all are electrically connected with described processor module.
7. embedded search and rescue sea chart instrument according to claim 4, it is characterized in that: described interface module comprises principal and subordinate USB interface, RS232 interface and TF card interface, described principal and subordinate USB interface, RS232 interface and TF card interface all are electrically connected with processor module, described display module comprises LCD and touch display screen module, described LCD and touch display screen module all are connected with processor module, and described locating module is GPS module or Big Dipper module.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103259550A (en) * | 2013-02-26 | 2013-08-21 | 中国科学院自动化研究所北仑科学艺术实验中心 | Distress signal receiving module and decoding method thereof |
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| CN103259550A (en) * | 2013-02-26 | 2013-08-21 | 中国科学院自动化研究所北仑科学艺术实验中心 | Distress signal receiving module and decoding method thereof |
| CN103259550B (en) * | 2013-02-26 | 2015-07-08 | 中国科学院自动化研究所北仑科学艺术实验中心 | Distress signal receiving module and decoding method thereof |
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