CN103248374B - Distress call transmitter module - Google Patents
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- CN103248374B CN103248374B CN201310059644.3A CN201310059644A CN103248374B CN 103248374 B CN103248374 B CN 103248374B CN 201310059644 A CN201310059644 A CN 201310059644A CN 103248374 B CN103248374 B CN 103248374B
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Abstract
The invention relates to a distress call transmitter module and an encoding method thereof, and can solve problems of serious influences of severe environment and poor quality performance in the prior art. The key points of the technical are as follows: the distress call transmitter module comprises a voltage stabilizing circuit, a transmitter antenna, a connection port, a frequency adjusting circuit, a radio frequency amplifying circuit, a feedback control circuit and a lowpass filtering circuit, wherein the input end of the frequency adjusting circuit is connected with a processor module through the connection port, the output end of the frequency adjusting circuit is connected with the input end of the radio frequency amplifying circuit, and the output end of the radio frequency amplifying circuit is connected with the transmitter antenna through the lowpass filtering circuit; and the input end of the feedback control circuit is connected with the processor module through the connection port, the feedback input end of the feedback control circuit is connected with the lowpass filtering circuit, and the control output end of the feedback control circuit is connected with the control end of the radio frequency amplifying circuit. A chart plotter product with the distress call transmitter module can meet performance and quality requirements of a C class standard, and is small in size, portable and simple and easy to operate and use.
Description
Technical field
The present invention relates to a kind of signal emission module and coding method thereof, be particularly a kind ofly arranged on distress signal transmitter module in embedded search-and-rescue marine chart instrument and coding method thereof.
Background technology
The requirement of search and rescue sea chart instrument product is: Performance and quality needs the ECDIS standard meeting the issue of Domestic Maritime department, and volume wants small and exquisite portable, operates simple for use, easily grasps, and is applicable to the convenient application of the related personnel such as operation on the sea.Product to collect GPS (Global Position System), marine special search and rescue network, GIS-Geographic Information System, the Internet, database synchronization technology one simultaneously, can research be adapted to.Product operation number of keys arranges moderate, operates comfortable, convenient, simply, easy to learn.Search and rescue sea chart instrument also will take into full account user's request and Information Technology Development trend, according to the site environment that user uses, function and use field condition, the product configuration scheme meeting user's requirement are selected in design, by tightly, organically combining, realize the best ratio of performance to price, reduce user's fund cost, be convenient to industry large-scale promotion and use, economical and practical value should be had.But present search and rescue sea chart instrument product often can not reach such demand, the place that needs carry out improving is more, particularly there is receiving and transmitting signal, signal encoded, decoding time, can not reach compared with there being the problem better exported under harsh environments.And the quality of distress signal transmitter module and coding method thereof is most important wherein.
China Patent Publication No.: CN102410835A, publication date: on April 11st, 2012, disclose a kind of embedded electronic sea chart navigator design of internal navigation, feature adopts 32 ARM core 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, built-in embedded China sea chart and the part such as Yangtze River waterway, Tai Lake inland chart, have boat location, the auxiliary function such as real-time navigation, odograph.But this technical scheme, can only carry out work in place relatively preferably at operational environment, once operational environment is tending towards severe, then transmission signal and signal transmission can be caused to have comparatively macrolesion, cause Signal transmissions unstable.
Summary of the invention
The object of the invention is to solve prior art receiving and transmitting signal, signal is encoded, decoding time, can not reach compared with there being the problem better exported under harsh environments, a kind of Performance and quality is provided to need to meet the ECDIS C class standard of Domestic Maritime department issue, volume wants small and exquisite portable, operate simple for use, easily grasp, be applicable to the convenient application of the related personnel such as operation on the sea.Product to collect GPS (Global Position System), marine special search and rescue network, GIS-Geographic Information System, the Internet, database synchronization technology one simultaneously, distress signal transmitter module and the coding method thereof of research can be adapted to.
The technical solution adopted for the present invention to solve the technical problems is: a kind of distress signal transmitter module, be arranged in embedded search-and-rescue marine chart instrument, it is characterized in that: described distress signal transmitter module comprises the voltage stabilizing circuit of power supply, 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, the control output end of feedback control circuit is connected with the control end of described radio frequency amplifying circuit.Performance and quality of the present invention needs the ECDIS C class standard meeting the issue of Domestic Maritime department, and volume wants small and exquisite portable, operates simple for use, easily grasps, and is applicable to the convenient application of the related personnel such as operation on the sea.Coordinate product simultaneously can will collect GPS (Global Position System), marine special search and rescue network, GIS-Geographic Information System, the Internet, database synchronization technology one, can research be adapted to.Embedded search-and-rescue marine chart instrument power supervisor provides working power for distress signal transmitter module.Power supply enters module from power input port.Input supply voltage is 8.2V, after a 4.8V pressurizer, for whole modular circuit provides electricity consumption.Embedded search-and-rescue marine chart instrument processor opens distress signal transmitter module internal emission control switch by distress signal emission interface, and distress signal transmitter module is started working.Embedded search-and-rescue marine chart instrument processor launches the distress signals data and modulation signal that provide and need to launch to distress signal by distress signal transmitting data input port.After distress signals data are inputted by data-in port, carry out signal frequency adjustment through frequency regulator.After modulation signal is inputted by data-in port, carry out frequency modulating signal bias adjustment through frequency departure adjuster.Distress signals signal after adjustment and modulation signal carry out signal madulation and frequency trim, obtain pre-sent signal y (0).Pre-sent signal y (0) is by a 52MHz crystal oscillator, and crystal oscillator starting of oscillation, produces the F(0 that transmits of 52MHz).Transmit F(0) through oscillator starting of oscillation, produce the F(1 that transmits that has periodic waveform).Transmit F(1) after a buffer amplifier and high pass filter carry out amplification filtering, obtain the F(2 that transmits).Transmit F(2) carry out radio frequency amplification by multiple radio frequency amplifier, obtain the F(3 that transmits).Transmit F(3) after two low pass filters carry out filtering, 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 automatic phase control amplifier.Automatic phase control amplifier regulates the multiplication factor of rear 2 radio frequency amplifiers according to testing result, makes the F(4 that transmits) reach preassigned.Power sense circuit records the F(4 that transmits) reach preassigned, by signal F(4) again carry out secondary low-pass filtering after, gone out by antenna transmission.Distress signal transmitter module works in 156.800MHz distress call channel waterborne, adopt MSK modulation system, be integrated with low pass filter, high pass filter and radio frequency amplifier, transmission range, up to 15 nautical miles, is a reliable high-performance wireless signal emission module.Under distress situation, launched by distress signal and send autonomous distress signals (comprising current location information and the self identification of GPS module acquisition) to rescue center, function of initiatively crying for help can be realized.Rescue center receives distress signal transmitter module, the distress signals sent by analysis of built-in search-and-rescue marine chart instrument, positions embedded search-and-rescue marine chart instrument user, launches to search and rescue.User can independently or allow embedded search-and-rescue marine chart instrument automatically send distress signal by Fixed Time Interval, cries for help under being applicable to different situation.
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 connecting successively, 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 second low pass filter is connected with feedback control circuit as feedback output end.
As preferably, 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 emission control switch, and the described automatic feedback output end of control phase amplifier is connected with the feedback input end of radio frequency amplifying circuit.
As preferably, described frequency adjustment circuit comprises 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, the output that described high pass filter connects is connected with the input of radio frequency amplifying circuit.
As preferably, described radio frequency amplifying circuit comprises first radio frequency amplifier of connecting successively, second radio frequency amplifier, 3rd radio frequency amplifier, 4th radio frequency amplifier and the 5th radio frequency amplifier, the described input of the first radio frequency amplifier is connected with the output of frequency adjustment circuit, the output of described 5th radio frequency amplifier is connected with the input of low-pass filter circuit, described 4th radio frequency amplifier and the 5th radio frequency amplifier are the radio frequency amplifier with feedback interface, the feedback interface of described 4th radio frequency amplifier and the 5th radio frequency amplifier is all electrically connected with described feedback control circuit.
As preferably, described embedded search-and-rescue marine chart instrument, 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, and described all control buttons, interface module, display module, loudspeaker module, locating module, data storage and program storage are all 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 are all electrically connected with described power management module.Embedded search-and-rescue marine chart instrument power supervisor provides working power for distress signal transmitter module.Power supply enters module from power input port.Input supply voltage is 8.2V, after 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 product design adopts lithium storage battery to have long period power supply capacity, and whole device housings adopts waterproof material simultaneously.This embedded search-and-rescue marine chart instrument compact, be easy to carry, shell adopts waterproof material, battery adopts high-capacity lithium storage battery, ensure that embedded search-and-rescue marine chart instrument can use in adverse circumstances, also can be applicable to simultaneously conditional electronic sea chart instrument inconvenience use environment in, greatly extend the scope of application, add practicality.
As preferably, described embedded search-and-rescue marine chart instrument also comprises distress signal receiver module, and described distress signal receiver module and distress signal transmitter module are all 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 are all electrically connected with processor module, described display module comprises LCD and touch display screen module, described LCD is all connected with processor module with touch display screen module, and described locating module is GPS module or Big Dipper module.
As preferably, described distress signal receiver module comprises the voltage stabilizing power supplying circuit of power supply, reception antenna, receiver module controller, bus switch, protector circuit, filter circuit, mixing amplifying circuit, modulation-demodulation circuit, 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 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 described output of mixing amplifying circuit is connected with the input of modulation-demodulation circuit, the output of modulation-demodulation circuit is connected with receiver module controller, described receiver module controller is also electrically connected with receiver module first memory and USB integrated circuit, described receiver module second memory is electrically connected with described USB integrated circuit.Distress signal receiver module can receive the persons falling in water distress signal that a kind of persons falling in water localizing emission device sends.Distress signal receiver module adopts digital selective call technology to receive the signal launched from VHF, perfectly can receive single or multiple persons falling in water distress signal and can not produce interference between multiple distress signal.Distress signal receiver module receive frequency is once per minute, and can guarantee the accessible reception within the scope of sea 10-15 nautical mile.Efficiently solve the interference problem that multi signal receives, ensure the reception completely of distress signal, the problem that signal is omitted can not occur.Distress signal receiver module is at compact, lightweight, low in energy consumption, powerful, peripheral circuit is few, easy to use, signal transacting (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 work in-20 DEG C ~+55 DEG C scopes, there is USB, RS-232 data way of output, be convenient to application.Distress signal receiver module is first divided by the signal X (0) in antenna reception air by its internal signal reception processing unit.Signal X (0), through protector, arrives a low pass filter and band pass filter carries out preliminary filtering.Received signal strength X (0), after preliminary filtering, obtains the useful signal X (1) removing clutter.Useful signal X (1) carries out radio frequency amplification by a radio frequency amplifier, obtains signal X (2).Signal after radio frequency amplifies, by the first mixing unit, carries out mixing with signal Y (1), obtains mixed frequency signal X (3).Signal Y (1) is that the signal Y (0) provided by microcontroller vibrates through buffering and amplifies the signal processing and obtain 2 times.After mixed frequency signal X (3) carries out filtering process by monolithic crystal filter, obtain filtering signal X (4).Filtering signal X (4) through an intermediate frequency amplifier and an intermediate frequency integrated circuit, processing signals intermediate-frequency section.The intermediate-frequency section of filtering signal X (4) is first amplified by intermediate frequency amplifier by filtering signal X (4), obtain signal X (5), by intermediate frequency integrated circuit, X (5) and signal Y (2) are carried out intermediate frequency process again, obtain signal X (6).Signal Y (2) is the intermediate-freuqncy signal that the signal Y (0) provided by microcontroller obtains after a phase-locked loop and 2 grades of amplifiers process.Signal X (6) carries out amplification 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) reads for the discernible digital signal of microcontroller, microcontroller signal X (7), analyze and calculates, and obtains the useful information in primary signal X (0).Microcontroller is responsible for carrying out signal resolution, data export, data store, provide signal processing desired signal, driving LED.After microcontroller receives restituted signal X (7), by providing algorithm in advance, analyzing and processing is carried out to restituted signal X (7).The persons falling in water distress signals (staff for help's positional information and identify label) comprised in primary signal X (0) are obtained after process terminates.Carry out signal receiving (after detection), decoding is carried out to data, after decoding, obtain receiving data.After microcontroller place obtains distress signals, microcontroller judges to need persons falling in water distress signals be stored into memory or carry out transfer of data by interface section as required.Interface section is as the data input output ports of distress signal receiver module and power input port.Embedded search-and-rescue marine chart instrument power supervisor provides power supply by interface section to distress signal receiver module.Power supply enters from interface section, for whole module provides electricity consumption after the voltage stabilizing of 4.7V pressurizer.The data input output ports of interface section comprises bus input and output and the input and output of USB formatted data.If microcontroller needs to be exported by bus to receive data, first to export staff for help's information to bus switch, then export data by bus switch to FPDP.Data entry process is contrary with output procedure.If microcontroller needs to be exported by USB to receive data, first to export staff for help's information to USB interface integrated circuit, then export data by USB interface integrated circuit to FPDP.Data entry process is contrary with output procedure.The data input output ports of distress signal receiver module provides persons falling in water distress signals to the processor module of embedded search-and-rescue marine chart instrument.The distress signal that embedded search-and-rescue marine chart instrument is sent by distress signal receiver module reception persons falling in water.After receiving the distress signal that single or multiple persons falling in water sends, processor carries out analyzing and processing to the distress signal obtained, and in conjunction with digital chart data, is intuitively shown by the real time position of persons falling in water on digital chart.In conjunction with user's self-position data, persons falling in water position data and electronic chart data, user can understand the distance between self-position and persons falling in water position fast, facilitates user to carry out search and rescue.
As preferably; described filter circuit comprises receiver module low pass filter, the first band pass filter, radio frequency amplifier, second band pass filter of connecting successively; the input of described receiver module low pass filter is connected with the output of protector circuit, and the output of described second band pass filter is connected with the input of described mixing amplifying circuit.
As preferably, described mixing amplifying circuit comprises reference oscillation circuit, first frequency mixer, monolithic crystal filter, intermediate frequency amplifier, intermediate frequency integrated circuit, audio frequency amplifier, first amplifier, second amplifier, buffer amplifier, receive voltage controlled oscillator, phase-locked loop and temperature compensating crystal oscillator, the first input end of described first frequency mixer is connected with the output of described filter circuit, 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, receive the input of voltage controlled oscillator to be connected with the first output of phase-locked loop, the input of phase-locked loop is electrically connected with receiver module controller, the crystal oscillator end of described phase-locked loop is connected with temperature compensating crystal oscillator, second output of phase-locked loop is connected with described intermediate frequency integrated circuit control end by the second amplifier, the output of described first frequency mixer is electrically connected by the input of monolithic crystal filter with intermediate frequency integrated circuit, the benchmark input end of intermediate frequency integrated circuit is connected with reference oscillation circuit, the output of intermediate frequency integrated circuit is electrically connected with modulation-demodulation circuit by audio frequency amplifier.
A cataloged procedure for described distress signal sending module, is characterized in that: the cataloged procedure of described distress signal sending module comprises the following steps:
Coding sub-step one: first carry out Data Modulation initialization, then interrupt source is removed, judge the occurrence of NEXT_bit and currency, if equal 0, the MOD assignment of MSK mode being encoded is 0, then the subfunction performed is selected, if equal 1, the MOD assignment of MSK mode being encoded is 1, then selects the coding subfunction performed;
Coding sub-step two: perform coding subfunction according to selection;
Coding sub-step three: coding exports, then interrupts 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: then first setting transmission byte number sets the DAT encoded radio of BitPos, resets modulating data, performs subfunction 2, then performs and interrupts return function;
Subfunction 2: the DAT encoded radio of modulating data and BitPos does and computing, if it is 1 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0, the DAT encoded radio of modulating data and BitPos does and computing, if it is 0 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0; After position modulating data assignment terminates, position modulating data and 0x80 are done with computing after the value that draws as currency, be set as the BitPos value that MSK mode is encoded, perform subfunction 3 afterwards, 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 drawn is to NEXT_Bit, BitPos value moves to right one, the MSK mode encoded radio of BitPos is greater than 0x02, then perform and interrupt return function, next time still performs subfunction 3 when performing coding, the MSK mode encoded radio of BitPos is less than or equal to 0x02, then the DAT mode encoded radio of BitPos is moved to right one, the DAT mode encoded radio of BitPos is not equal to 0x00, then perform subfunction 2, then perform and interrupt return function, the DAT mode encoded radio of BitPos equals 0x00, transmission byte number, transmission byte number is not equal to 0, the BitPos value of setting DAT coded system, setting modulating data, then redirect performs subfunction 2, transmission byte number equals 0, setting transmission frame number, the BitPos value of setting DAT coded system, the Index that fetch program sets, modulating data is set as Buf(Index), then subfunction 4 is performed, perform again afterwards and interrupt return function,
Subfunction 4: the DAT encoded radio of modulating data and BitPos does and computing, if it is 1 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0, the DAT encoded radio of modulating data and BitPos does and computing, if it is 0 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0; After position modulating data assignment terminates, position modulating data and 0x80 are done with computing after the value that draws as currency, be set as the BitPos value that MSK mode is encoded, perform subfunction 5 afterwards, 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 drawn is to NEXT_Bit, BitPos value moves to right one, the MSK mode encoded radio of BitPos is greater than 0x02, then perform and interrupt return function, next time still performs subfunction 5 when performing coding, if the MSK mode encoded radio of BitPos is less than or equal to 0x02, then the DAT mode encoded radio of BitPos is moved to right one, the DAT mode encoded radio of BitPos is not equal to 0x00, then perform subfunction 4, then perform and interrupt return function, the DAT mode encoded radio of BitPos equals 0x00, the DAT mode encoded radio of setting BitPos, the value of Index performs rearmounted from adding computing, the value of Index is less than 21 and modulating data is set as buf(Index) value, then subfunction 4 is performed, perform again afterwards and interrupt return function, Index value is more than or equal to 21, the frame number of coded data performs rearmounted from subtracting computing, the frame number of coded data is not equal to 0 by clear for the value of Index 0, modulating data is set as Buf(Index), then subfunction 4 is performed, perform again afterwards and interrupt return function, the frame number of coded data equals 0 and performs subfunction 0, and then perform interruption return function.MSKMOD:msk in this specification and digital output value are (for exporting the value of NEXT_bit, namely according to the value (0,1) of NEXT_bit, control single chip computer externally exports analog value (0,1)), bitpos: the position of corresponding positions, bitpos (DAT): the DAT data of the position of corresponding positions, bitpos (MSK): the MSK data of the position of corresponding positions, buf [index]: respective cache index-location values, index: frame length judges parameter.
Substantial effect of the present invention is: Performance and quality needs the ECDIS C class standard meeting the issue of Domestic Maritime department, and volume wants small and exquisite portable, operates simple for use, easily grasps, and is applicable to the convenient application of the related personnel such as operation on the sea.Product to collect GPS (Global Position System), marine special search and rescue network, GIS-Geographic Information System, the Internet, database synchronization technology one simultaneously, can research be adapted to.
Accompanying drawing explanation
Fig. 1 is a kind of circuit block diagram of the present invention;
Fig. 2 is a kind of circuit block diagram of middle distress signal receiver module of the present invention;
Fig. 3 be of the present invention in a kind of circuit block diagram of embedded search-and-rescue marine chart instrument;
Fig. 4 is the flow chart of a kind of distress signal transmission method of the present invention;
Fig. 5 is interpretation method procedure Procedure figure of the present invention;
Fig. 6 is coding method procedure Procedure figure of the present invention.
In figure: 1, control button, 2, interface module, 3, display module, 4, loudspeaker module, 5, locating module, 6, data storage, 7, program storage, 8, distress signal receiver module, 9, distress signal transmitter module, 10, processor module, 20, power management module, 21, battery, 22, secondary power system, 23, DC charging module, 24, USB charging module, 101, receiver module low pass filter, 102, first band pass filter, 103, radio frequency amplifier, 104, second band pass filter, 105, first frequency mixer, 106, monolithic crystal filter, 107, intermediate frequency amplifier, 108, intermediate frequency integrated circuit, 109, audio frequency amplifier, 110, modulation-demodulation circuit, 111, first amplifier, 112, buffer amplifier, 113, receive voltage controlled oscillator, 114, reference oscillation circuit, 115, second amplifier, 116, phase-locked loop, 117, temperature compensating crystal oscillator, 120, receiver module controller, 121, USB integrated circuit, 122, receiver module first memory, 123, receiver module second memory, 124, bus switch, 201, 4th low pass filter, 202, 3rd low pass filter, 203, second low pass filter, 204, first low pass filter, 205, 5th radio frequency amplifier, 206, 4th radio frequency amplifier, 207, 3rd radio frequency amplifier, 208, second radio frequency amplifier, 209, first radio frequency amplifier, 210, high pass filter, 211, send buffer amplifier, 212, oscillator, 213, crystal oscillator, 214, frequency trim module, 215, automatic control phase amplifier, 216, emission control switch, 217, voltage stabilizing circuit.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
A kind of distress signal transmitter module (see accompanying drawing 1) comprises the voltage stabilizing circuit 217 of power supply, 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, 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, second low pass filter 203, the 3rd low pass filter 202 and the 4th low pass filter 201 of connecting successively, 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 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 emission control switch, and the described automatic feedback output end of 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, the output that described high pass filter connects is connected with the input of radio frequency amplifying circuit, described radio frequency amplifying circuit comprises first radio frequency amplifier 209 of connecting successively, second radio frequency amplifier 208, 3rd radio frequency amplifier 207, 4th radio frequency amplifier 206 and the 5th radio frequency amplifier 205, the described input of the first radio frequency amplifier is connected with the output of frequency adjustment circuit, the output of described 5th radio frequency amplifier is connected with the input of low-pass filter circuit, described 4th radio frequency amplifier and the 5th radio frequency amplifier are the radio frequency amplifier with feedback interface, the feedback interface of described 4th radio frequency amplifier and the 5th radio frequency amplifier is all 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 are all electrically connected with processor module, described display module comprises LCD and touch display screen module, described LCD is all connected with processor module with touch display screen module, and described locating module is GPS module or Big Dipper module.
Described embedded search-and-rescue marine chart instrument (see accompanying drawing 3), 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 be made up of single chip circuit, the control key-press module be made up 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 are all 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 are all electrically connected with described power management module.Described embedded search-and-rescue marine 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 are all electrically connected with described processor module.
Described distress signal receiver module (see accompanying drawing 2) comprises the voltage stabilizing power supplying circuit of power supply, reception antenna, the receiver module controller 120 be made up of single chip circuit, bus switch 124, protector circuit, filter circuit, 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 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 described output of mixing amplifying circuit is connected with the input of modulation-demodulation circuit, the output of modulation-demodulation circuit 110 is connected with receiver module controller, described receiver module controller is also electrically connected with receiver module first memory and USB integrated circuit, described receiver module second memory is electrically connected with described USB integrated circuit.Described filter circuit comprises receiver module low pass filter 101, first band pass filter 102, radio frequency amplifier 103, second band pass filter 104 of connecting successively; the input of described receiver module low pass filter is connected with the output of protector circuit, and the output of described second band pass filter is connected with the input of described mixing amplifying circuit.Described mixing amplifying circuit comprises reference oscillation circuit 114, first frequency mixer 105, monolithic crystal filter 106, intermediate frequency amplifier 107, intermediate frequency integrated circuit 108, audio frequency amplifier 109, first amplifier 111, 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 first frequency mixer is connected with the output of described filter circuit, 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, receive the input of voltage controlled oscillator to be connected with the first output of phase-locked loop, the input of phase-locked loop is electrically connected with receiver module controller, the crystal oscillator end of described phase-locked loop is connected with temperature compensating crystal oscillator, second output of phase-locked loop is connected with described intermediate frequency integrated circuit control end by the second amplifier, the output of described first frequency mixer is electrically connected by the input of monolithic crystal filter with intermediate frequency integrated circuit, the benchmark input end of intermediate frequency integrated circuit is connected with reference oscillation circuit, the output of intermediate frequency integrated circuit is electrically connected with modulation-demodulation circuit by audio frequency amplifier.
During the distress signal transmission of the present embodiment (see accompanying drawing 4), distress signal transmitter module interface section is as the data-in port of distress signal transmitter module and power input port.Embedded search-and-rescue marine chart instrument power supervisor provides working power for distress signal transmitter module.Power supply enters module from power input port.Input supply voltage is 8.2V, after a 4.8V pressurizer, for whole modular circuit provides electricity consumption.Embedded search-and-rescue marine chart instrument processor opens distress signal transmitter module internal emission control switch by distress signal emission interface, and distress signal transmitter module is started working.Embedded search-and-rescue marine chart instrument processor launches the distress signals data and modulation signal that provide and need to launch to distress signal by distress signal transmitting data input port.After distress signals data are inputted by data-in port, carry out signal frequency adjustment through frequency regulator.After modulation signal is inputted by data-in port, carry out frequency modulating signal bias adjustment through frequency departure adjuster.Distress signals signal after adjustment and modulation signal carry out signal madulation and frequency trim, obtain pre-sent signal y (0).Pre-sent signal y (0) is by a 52MHz crystal oscillator, and crystal oscillator starting of oscillation, produces the F(0 that transmits of 52MHz).Transmit F(0) through oscillator starting of oscillation, produce the F(1 that transmits that has periodic waveform).Transmit F(1) after a buffer amplifier and high pass filter carry out amplification filtering, obtain the F(2 that transmits).Transmit F(2) carry out radio frequency amplification by multiple radio frequency amplifier, obtain the F(3 that transmits).Transmit F(3) after two low pass filters carry out filtering, 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 automatic phase control amplifier.Automatic phase control amplifier regulates the multiplication factor of rear 2 radio frequency amplifiers according to testing result, makes the F(4 that transmits) reach preassigned.Power sense circuit records the F(4 that transmits) reach preassigned, by signal F(4) again carry out secondary low-pass filtering after, gone out by antenna transmission.Distress signal transmitter module works in 156.800MHz distress call channel waterborne, adopt MSK modulation system, be integrated with low pass filter, high pass filter and radio frequency amplifier, transmission range, up to 15 nautical miles, is a reliable high-performance wireless signal emission module.Under distress situation, launched by distress signal and send autonomous distress signals (comprising current location information and the self identification of GPS module acquisition) to rescue center, function of initiatively crying for help can be realized.Other embedded search-and-rescue marine chart instrument or rescue center receive distress signal transmitter module, the distress signals sent by analysis of built-in search-and-rescue marine chart instrument, position embedded search-and-rescue marine chart instrument user, launch to search and rescue.User can independently or allow embedded search-and-rescue marine chart instrument automatically send distress signal by Fixed Time Interval, cries for help under being applicable to different situation.
Distress signal receiver module is first divided by the signal X (0) in antenna reception air by its internal signal reception processing unit.Signal X (0), through protector, arrives a low pass filter and band pass filter carries out preliminary filtering.Received signal strength X (0), after preliminary filtering, obtains the useful signal X (1) removing clutter.Useful signal X (1) carries out radio frequency amplification by a radio frequency amplifier, obtains signal X (2).Signal after radio frequency amplifies, by the first mixing unit, carries out mixing with signal Y (1), obtains mixed frequency signal X (3).Signal Y (1) is that the signal Y (0) provided by microcontroller vibrates through buffering and amplifies the signal processing and obtain 2 times.After mixed frequency signal X (3) carries out filtering process by monolithic crystal filter, obtain filtering signal X (4).Filtering signal X (4) through an intermediate frequency amplifier and an intermediate frequency integrated circuit, processing signals intermediate-frequency section.The intermediate-frequency section of filtering signal X (4) is first amplified by intermediate frequency amplifier by filtering signal X (4), obtain signal X (5), by intermediate frequency integrated circuit, X (5) and signal Y (2) are carried out intermediate frequency process again, obtain signal X (6).Signal Y (2) is the intermediate-freuqncy signal that the signal Y (0) provided by microcontroller obtains after a phase-locked loop and 2 grades of amplifiers process.Signal X (6) carries out amplification 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) reads for the discernible digital signal of microcontroller, microcontroller signal X (7), analyze and calculates, and obtains the useful information in primary signal X (0).Microcontroller is responsible for carrying out signal resolution, data export, data store, provide signal processing desired signal, driving LED.After microcontroller receives restituted signal X (7), by providing algorithm in advance, analyzing and processing is carried out to restituted signal X (7).The persons falling in water distress signals (staff for help's positional information and identify label) comprised in primary signal X (0) are obtained after process terminates.Carry out signal receiving (after detection), decoding is carried out to data, after decoding, obtain receiving data.After microcontroller place obtains distress signals, microcontroller judges to need persons falling in water distress signals be stored into memory or carry out transfer of data by interface section as required.Interface section is as the data input output ports of distress signal receiver module and power input port.Embedded search-and-rescue marine chart instrument power supervisor provides power supply by interface section to distress signal receiver module.Power supply enters from interface section, for whole module provides electricity consumption after the voltage stabilizing of 4.7V pressurizer.The data input output ports of interface section comprises bus input and output and the input and output of USB formatted data.If microcontroller needs to be exported by bus to receive data, first to export staff for help's information to bus switch, then export data by bus switch to FPDP.Data entry process is contrary with output procedure.If microcontroller needs to be exported by USB to receive data, first to export staff for help's information to USB interface integrated circuit, then export data by USB interface integrated circuit to FPDP.Data entry process is contrary with output procedure.The data input output ports of distress signal receiver module provides persons falling in water distress signals to the processor module of embedded search-and-rescue marine chart instrument.The distress signal that embedded search-and-rescue marine chart instrument is sent by distress signal receiver module reception persons falling in water.After receiving the distress signal that single or multiple persons falling in water sends, processor carries out analyzing and processing to the distress signal obtained, and in conjunction with digital chart data, is intuitively shown by the real time position of persons falling in water on digital chart.In conjunction with user's self-position data, persons falling in water position data and electronic chart data, user can understand the distance between self-position and persons falling in water position fast, facilitates user to carry out search and rescue.
A kind of cataloged procedure (see accompanying drawing 6) of distress signal sending module comprises the following steps:
Coding sub-step one: first carry out Data Modulation initialization, then interrupt source is removed, judge the occurrence of NEXT_bit and currency, if equal 0, the MOD assignment of MSK mode being encoded is 0, then the subfunction performed is selected, if equal 1, the MOD assignment of MSK mode being encoded is 1, then selects the coding subfunction performed;
Coding sub-step two: perform coding subfunction according to selection;
Coding sub-step three: coding exports, then interrupts 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: then first setting transmission byte number sets the DAT encoded radio of BitPos, resets modulating data, performs subfunction 2, then performs and interrupts return function;
Subfunction 2: the DAT encoded radio of modulating data and BitPos does and computing, if it is 1 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0, the DAT encoded radio of modulating data and BitPos does and computing, if it is 0 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0; After position modulating data assignment terminates, position modulating data and 0x80 are done with computing after the value that draws as currency, be set as the BitPos value that MSK mode is encoded, perform subfunction 3 afterwards, 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 drawn is to NEXT_Bit, BitPos value moves to right one, the MSK mode encoded radio of BitPos is greater than 0x02, then perform and interrupt return function, next time still performs subfunction 3 when performing coding, the MSK mode encoded radio of BitPos is less than or equal to 0x02, then the DAT mode encoded radio of BitPos is moved to right one, the DAT mode encoded radio of BitPos is not equal to 0x00, then perform subfunction 2, then perform and interrupt return function, the DAT mode encoded radio of BitPos equals 0x00, transmission byte number, transmission byte number is not equal to 0, the BitPos value of setting DAT coded system, setting modulating data, then redirect performs subfunction 2, transmission byte number equals 0, setting transmission frame number, the BitPos value of setting DAT coded system, the Index that fetch program sets, modulating data is set as Buf(Index), then subfunction 4 is performed, perform again afterwards and interrupt return function,
Subfunction 4: the DAT encoded radio of modulating data and BitPos does and computing, if it is 1 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0, the DAT encoded radio of modulating data and BitPos does and computing, if it is 0 that data export, judge whether data output state value is 1, if data output state value is 1, contraposition modulating data assignment 1, if data output state value is 0, contraposition modulating data assignment 0; After position modulating data assignment terminates, position modulating data and 0x80 are done with computing after the value that draws as currency, be set as the BitPos value that MSK mode is encoded, perform subfunction 5 afterwards, 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 drawn is to NEXT_Bit, BitPos value moves to right one, the MSK mode encoded radio of BitPos is greater than 0x02, then perform and interrupt return function, next time still performs subfunction 5 when performing coding, if the MSK mode encoded radio of BitPos is less than or equal to 0x02, then the DAT mode encoded radio of BitPos is moved to right one, the DAT mode encoded radio of BitPos is not equal to 0x00, then perform subfunction 4, then perform and interrupt return function, the DAT mode encoded radio of BitPos equals 0x00, the DAT mode encoded radio of setting BitPos, the value of Index performs rearmounted from adding computing, the value of Index is less than 21 and modulating data is set as buf(Index) value, then subfunction 4 is performed, perform again afterwards and interrupt return function, Index value is more than or equal to 21, the frame number of coded data performs rearmounted from subtracting computing, the frame number of coded data is not equal to 0 by clear for the value of Index 0, modulating data is set as Buf(Index), then subfunction 4 is performed, perform again afterwards and interrupt return function, the frame number of coded data equals 0 and performs subfunction 0, and then perform interruption return function.
Embedded search-and-rescue marine chart instrument control method, comprises the following steps:
Main step one: embedded search-and-rescue marine chart instrument initialization, the sea chart engine start that embedded search-and-rescue marine chart instrument is built-in;
Main step 2: start simultaneously and perform positioning step, Signal reception step and control button interrupt scanning step;
Described positioning step comprises: first start locating module, then obtains locator data, and then processor module carries out data analysis, then in conjunction with digital chart display current device location, redirect afterwards re-executes and obtains locator data step;
Described positioning step comprises: first start distress signal receiver module, then distress signal receiver module accepts distress signal and to go forward side by side row decoding, processor module carries out data analysis, then in conjunction with digital chart display current device location, redirect afterwards re-executes and accepts distress signal step;
Control button interrupt scanning step comprises: first continue to carry out interrupt scanning to the emergency control button of setting, once press control button, then start distress signal receiver module transmitter module, send self distress signal, and then the emergency control button that redirect performs setting continues the step of carrying out interrupt scanning.
The decode procedure (see accompanying drawing 5) of described distress signal receiver module comprises the following steps:
Decoding sub-step one: carry out parameter definition, initialization adds, the butterfly parameter of comparison and selection is grand, definition Hamming distance amount parameter;
Data, if the preamble data in check code data is invalid, is exported, then terminate decoding flow process by decoding sub-step two: call and Check and Inspection code data, if preamble data effectively, perform decoding sub-step three;
Then data are exported by decoding sub-step three: judge the whether complete end of data, if data integrity terminates, recall, and terminate decoding flow process, otherwise enter sub-step four;
Decoding sub-step four: carry out byte displacement calculating, byte displacement has calculated rear record data length;
Decoding sub-step five: the length of detection record data, if data length equals 0, recalls, and then perform decoding sub-step three, data length is non-zero else if, then re-execute decoding sub-step three.Described byte displacement calculates and comprises following sub-step:
Displacement calculation procedure one: read in two bits, calculate the bit number and the theoretical distance exporting bit number that receive, current byte moves two;
Displacement calculates step 2: the first time decoding that routine call sets calculates, and calculates next attitude tolerance by current metric;
Displacement calculates step 3: the survivor path that record is nearest with receiving sequence;
Displacement calculates step 4: read in two bits, and calculate the bit number and the theoretical distance exporting bit number that receive, current byte moves two;
Displacement calculates step 5: the second time decoding that routine call sets calculates, and calculates next attitude tolerance by current metric;
Displacement calculates step 6: the survivor path that record is nearest with receiving sequence.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (6)
1. a distress signal transmitter module, be arranged in embedded search-and-rescue marine chart instrument, it is characterized in that: described distress signal transmitter module comprises the voltage stabilizing circuit of power supply, 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, the control output end of feedback control circuit is connected with the control end of described radio frequency amplifying circuit, described frequency adjustment circuit comprises 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, the output that described high pass filter connects is connected with the input of radio frequency amplifying circuit, described low-pass filter circuit comprises first low pass filter of connecting successively, second low pass filter, 3rd low pass filter and the 4th low pass filter, 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, the output of described second low pass filter is connected with feedback control circuit as feedback output end.
2. distress signal transmitter module according to claim 1, it is characterized in that: described radio frequency amplifying circuit comprises first radio frequency amplifier of connecting successively, second radio frequency amplifier, 3rd radio frequency amplifier, 4th radio frequency amplifier and the 5th radio frequency amplifier, the described input of the first radio frequency amplifier is connected with the output of frequency adjustment circuit, the output of described 5th radio frequency amplifier is connected with the input of low-pass filter circuit, described 4th radio frequency amplifier and the 5th radio frequency amplifier are the radio frequency amplifier with feedback interface, the feedback interface of described 4th radio frequency amplifier and the 5th radio frequency amplifier is all electrically connected with described feedback control circuit.
3. distress signal transmitter module according to claim 1, it is characterized in that: described embedded search-and-rescue marine chart instrument, 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, all described control buttons, interface module, display module, loudspeaker module, locating module, data storage and program storage are all electrically connected with processor module.
4. distress signal transmitter module according to claim 3, it is characterized in that: described electric power system comprises power management module, battery, secondary power system, DC charging module and USB charging module, described battery, secondary power system, DC charging module and USB charging module are all electrically connected with described power management module.
5. distress signal transmitter module according to claim 3, it is characterized in that: described embedded search-and-rescue marine chart instrument also comprises distress signal receiver module, described distress signal receiver module and distress signal transmitter module are all electrically connected with described processor module.
6. the distress signal transmitter module according to claim 3 or 4 or 5, 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 are all electrically connected with processor module, described display module comprises LCD and touch display screen module, described LCD is all connected with processor module with touch display screen module, and described locating module is GPS module or Big Dipper module.
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