CN205028431U - Acoustic beacon with identity recognition function - Google Patents

The utility model relates to an acoustic beacon with identity recognition function, be equipped with two metal contacts that are used for triggering the automatic work of acoustic beacon control circuit on its seal shell, control circuit is mainly by switch circuit, a main control unit, and a power amplification circuit, a transformer, the piezoceramics ring, the battery constitutes, switch circuit is connected with the metal contact, the switch circuit output is connected with the main control unit, the main control unit output is connected with power amplification circuit, the load that transformer and piezoceramics ring match harmonious constitution power amplification circuit, the metal contact switches on after meeting water, autotrigger switch circuit, and then switch -on main control unit, the main control unit produces the code signal, through power amplification circuit, harmonious back vibrates, convert signalling into. Its characteristics are: in showing under water in the position of achieve your goals, the underwater sound signal contains coding information, has an one -to -one relation with the target of wearing the installation, the discernment of the target of being convenient for identity, and its simple structure, the low power dissipation, small, the installation of being convenient for is worn with personnel, provides conveniently for the rescue, has very high practical value.

A kind of acoustic marker with identity recognition function

Technical field

The utility model relates to a kind of underwater sound signal emitter for Target indication position in water, especially transmits containing coded message for distinguishing a kind of acoustic marker with identity recognition function of target identities in water.

Background technology

In the operation process of the multiple industry fields such as navigation shipping, marine engineering construction, scientific investigation, Aero-Space, probably there is personnel or the overboard fortuitous event of equipment.Show that the measure of position mainly contains lifejacket light and reflective tape, radiobeacon, sea coloring agent, aerosol bomb etc. for the overboard rear emergency of personnel, ship or valuable cargo equipment at present, signal form is mainly radio signal and optical signalling, the stability of these signals is subject to sea visibility and sea situation impact at sea, and the working time is limited, part shows that an equipment volume is comparatively large, also needs people to be manual operation.When overboard personnel, material equipment sink under the water, radio signal and optical signalling limited transmission in water, all cannot send emergency and show an information, add maritime search and rescue difficulty, carries out search salvage just as looking for a needle in a haystack at boundless sea, very difficult.

At present, underwater sound signal is compared to the beacon of other signal form such as radio, optical signalling, and decaying in water is minimumly easy to long-distance communications, is that water medium and long distance propagates the most effective signal transmission mode.Position and detection are applied in searching to utilize the acoustic marker technology of underwater sound signal indicating target position to show in aircraft black box water, but its signal form is simple periodically CW and pure-tone polse signal, the feature distinguishing different beacon is not comprised in signal, distinguishing different beacon cannot be realized, when the submarine target of acoustic marker is equipped with in search, can cause owing to distinguishing target identities optimizing search and rescue order or the misleading by false target signal, effect is searched and rescued in impact.

Have the general volume and weight of underwater sound signal transmitter of identity recognition function containing number information in addition large, some also adopts external power source, be unfavorable for personnel, ship or valuable cargo equipment installation, wear and use with lifesaving.

Summary of the invention

The purpose of this utility model is to provide little containing coded message, volume weight in a kind of transmitting, be convenient to the acoustic marker with identity recognition function that personnel wear and install on article.

Concrete technical scheme of the present utility model is as follows: a kind of acoustic marker with identity recognition function, comprise seal casinghousing, the control circuit be arranged in seal casinghousing, it is characterized in that seal casinghousing is provided with two for triggering the hard contact of acoustic marker control circuit automatic operation, control circuit is formed primarily of on-off circuit, main control unit, power amplification circuit, transformer, piezoelectric ceramic ring, battery; The input end of on-off circuit is connected with two hard contacts on seal casinghousing, and switching circuitry output is connected with main control unit, and main control unit output terminal is connected with power amplification circuit, the load of transformer and the tuning rear formation power amplification circuit of piezoelectric ceramic ring coupling; Two hard contacts on seal casinghousing are separate, in atmosphere in high-impedance state, conducting after chance water, automatic trigger switch circuit, and then connect main control unit, main control unit produces periodic code's signal of certain frequency and pulse width, containing coded message in this signal, after power amplification circuit, mate the tuning load formed by transformer coupled driving by transformer and piezoelectric ceramic ring, complete electric signal and outwards launch to the conversion of acoustical signal.Coded message contained in the coded signal that each acoustic marker main control unit produces is unique, is used for distinguishing different beacons and wearing installing the personnel of this beacon, the identity of equipment.

Described piezoelectric ceramic ring is fixed on the inside of seal casinghousing by entrant sound vulcanizate, piezoelectric ceramic ring and seal casinghousing concentric.

Described main control unit adopts has the low-power scm of programing function or the programmable logic device (CPLD)/FPGA of low-power consumption.

Described acoustic marker transmission frequency, at more than 20kHz, is convenient to that personnel wear, equipment is installed, meet small form factor requirements.

The coded message that described main control unit exports, its code symbols is filling signal frequency or signal pulse width, and when code symbols is filling signal frequency, the difference as two kinds of signal frequency f1 and f2 of code element should be greater than 0.5KHz, is less than 2KHz; When code symbols is signal pulse width, two kinds of signal pulse width t1 and t2 as code element should differ 3-5 doubly.

The signal source that the utility model main control unit produces is under the prerequisite of the cyclic pulse signal of certain frequency, certain pulse width, encode using signal frequency or signal pulse width as code element, this code element is " 0 " and " 1 " in signal source coded message.When code symbols is signal frequency, the pulse width that signal exports immobilizes, the signal frequency of filling in the pulse width time that signal exports has two kinds, " 0 " and " 1 " that represents coded message respectively of different filling signal frequencies, a kind of frequency is only filled under same signal pulse width, when beacon signal periodically exports, the signal of n pulse width is had in the signal in n cycle, also just containing n code element, n code element defines the coded message of a group coding as this beacon, two kinds of filling signal frequency phase-differences as code element are excessive affects mating of transformer coil and piezoelectric ceramics, differ the too small differentiation affecting code element, both differences should be greater than 0.5KHz, be less than 2KHz.When code symbols is the pulse width of signal output, filling signal frequency immobilizes, the pulse width that now signal exports has two kinds, different pulse widths represents " 0 " and " 1 " of coded message respectively, when beacon signal periodically exports, the signal of n pulse width is had in the signal in n cycle, also just containing n code element, n code element defines the coded message of a group coding as this beacon, two kinds of signal pulse width as code element have big difference increases the power consumption of acoustic marker, differ the too small differentiation affecting code element, both width should differ 3-5 doubly.The coding of each beacon is unique, and when searching beacon, the coded message by reception and identification beacon is distinguished and determines the identity of immersed body.In order to ensure the uniqueness of coded message, the code element figure place of coded message is determined according to the target total quantity that will distinguish.Such as, when the number of symbols of coded message is N, then 2 can be distinguished at most ⁿtarget in individual water, receives for the ease of receiving end and identifies the coded message of acoustic marker, and the coded signal of acoustic marker adopts the mode of circulation transmitting.

Described signal source, after power amplification circuit, mates the tuning load formed by transformer coupled driving by transformer and piezoelectric ceramic ring, and both couplings are tuning directly related with the transmission frequency of acoustic marker.Secondary coil inductance, the piezoelectric ceramic ring parallel equivalent electric capacity of acoustic marker transmission frequency, transformer meet formula:

f = 1 2 π L C - - - ( 1 )

Wherein f is oscillation frequency, and L is the inductance of secondary transformer, and C is the parallel equivalent electric capacity of piezoelectric ceramic ring in seal casinghousing after sulfuration.For the ease of installing and wearing use, the frequency of acoustic marker generally should at more than 20kHz, to meet the requirement of acoustic marker miniaturization.

The specification of described piezoelectric ceramic ring frequency need meet the requirement of acoustic marker transmission frequency, piezoelectric ceramic ring is fixed on the inside of seal casinghousing by entrant sound vulcanizate, both are cured as one by having fine close-burning entrant sound vulcanizate by piezoelectric ceramic ring and seal casinghousing, after solidification, piezoelectric ceramic ring and seal casinghousing are formed and resonate, outside radiate acoustic signal, in order to ensure the uniformity coefficient of acoustic marker horizontal directivity, piezoelectric ceramic ring and seal casinghousing concentric.By the electroacoustic transformation of piezoelectric ceramic ring, the coded signal that main control unit produces is converted to acoustical signal after power amplification, transformer and piezoelectric ceramics ring oscillation are tuning and launches.

The utility model, by the acoustic marker maybe may falling into personnel in water to the ship of underwater work, goods and materials, equipment are equipped with a kind of miniaturization, when meeting accident accident, being met water and automatically outwardly being launched underwater sound signal, realizing showing position in the water of overboard object.Meanwhile, in order to distinguish and identify different overboard targets, make acoustic marker launch the underwater sound signal including coded message, utilize the identity of the uniqueness determination immersed body of this coded signal.Feature of the present utility model is:

1, the utility model adopts underwater sound signal form, and signal can long-distance communications in water, realize target show position under water; Meanwhile, underwater sound signal contains coded message, has one-to-one relationship with the target wearing installation; When multiple target is under water, utilizes the uniqueness of coded message to achieve target and distinguish and identify, thus determine the identity of immersed body.

2, output signal type is the cyclic pulse signal of certain frequency, certain pulse width, and the low-power consumption achieving acoustic marker exports; Simultaneously using pulse width or signal frequency as code symbols, coding is simple, is easy to realize, low to the hardware requirement of main control unit, is conducive to low-power consumption and the miniaturization of beacon, also facilitates the detection receiving end of acoustic marker to receive the decode.

3, the utility model adopt lithium battery power supply, volume is little, lightweight, low in energy consumption, be convenient to target install and personnel wear, can for a long time under water operating emission show a signal; Adopt and automatically connect control circuit work into water, do not need manual operation, salvage and provide reliable, stable for searching location and show a signal.

4, the utility model can be widely used in may unexpected overboard in personnel, goods and materials, equipment water survival, the reliable and stable underwater sound signal showing position waterborne can be provided, simultaneously, by the coded message comprised in signal, can fast, carry out the identification of target identities in time, provide conveniently to rescue, there is very high practical value.

Accompanying drawing explanation

Fig. 1 is the composition frame chart of the utility model acoustic marker;

Fig. 2 is the structural representation of the utility model acoustic marker.

Embodiment

Make a nearly step below in conjunction with accompanying drawing to the utility model to describe in detail:

As shown in Figure 1, the acoustic marker that the utility model provides, its control circuit is formed primarily of on-off circuit, main control unit, power amplification circuit, transformer, piezoelectric ceramic ring, battery.The input end of on-off circuit is connected with on seal casinghousing two hard contacts, and switching circuitry output is connected with main control unit, and main control unit output terminal is connected with power amplification circuit, and power amplification circuit is connected with piezoelectric ceramic ring with transformer.Main control unit adopts the low-power scm with programing function, also can adopt programmable logic device (CPLD) or the FPGA of low-power consumption, and it produces the signal source containing coded message.On-off circuit adopts transistor switching circuit, works on power for controlling main control unit.Power amplification circuit adopts triode two-stage to amplify the transformer coupled class B push-pull formula power amplification circuit formed, realize the power amplification to the signal source that main control unit exports, signal after amplification by the transformer coupled load exporting transformer and piezoelectric ceramic ring to and mate tuning composition, and completes front and back impedance matching.

The signal source of main control unit is the cyclic pulse signal of certain frequency, certain pulse width, it is using signal frequency or signal pulse width as code symbols, multiple code element forms a group coding information, after signal being amplified by power amplification circuit, be loaded in coupling tuned load, realize electroacoustic conversion, and coded pulse signal is launched.

As shown in Figure 2, the seal casinghousing of acoustic marker is that the end cover 2,11 arranged by cylindrical housings 9 and two ends is formed.Its cylindrical housings and end cover adopt metal material to make, and adopt between the two and are threaded, and be provided with O-ring seal 12.End cover 2 is provided with one end to be stretched in housing, the exposed metal electrode 3 outside end cover of the other end, is insulated by spacer sleeve 1 and end cap 2, metal electrode 3, is bonded and sealed by epoxy glue between spacer sleeve 1 and end cover 2.The exposed end of metal electrode 3 and spacer sleeve 1 should higher than end caps 2, and spacer sleeve upper surface is arc, meets water and misleads, cause acoustic marker work on power by mistake and send signal in order to prevent two hard contacts under non-overboard situation.Metal electrode 3 is a hard contact of acoustic marker, and seal casinghousing 9 is another hard contact of acoustic marker, and two hard contacts are the input end of on-off circuit.Two hard contacts are separate in atmosphere in high-impedance state, and two hard contacts meet conducting after water, automatic trigger switch circuit, and then connect main control unit, thus realize the function that acoustic marker enters automatic operation after water.Metal electrode 3 end stretched in housing is against on spring 4, and spring 4 is connected with on-off circuit.Be provided with on-off circuit, the circuit board 5 of main control unit is arranged in housing, the circuit board 8 of power amplification circuit, transformer is provided with below it, the outside of circuit board 8 is provided with piezoelectric ceramic ring 7, piezoelectric ceramic ring is fixed on housing by entrant sound vulcanizate 6, the piezoelectric ceramic ring after installation and housing concentric.The below of transformer is provided with battery 10, and its two ends are connected with control circuit and end cover 11 respectively by spring, form electric pathway.

When the code symbols of main control unit is signal filling frequency, the difference that signal as code element fills frequency f 1 and f2 should be greater than 0.5KHz, be less than 2KHz, f1 and f2 has big difference affects mating of transformer coil and piezoelectric ceramics, differ the too small differentiation affecting code element, the period distances that signal is launched is fixed value T, and signal pulse width is fixed value t, signal frequency f1 and f2 represents code symbols " 0 " and " 1 " respectively, exports according to the coded message circulation of beacon.

When the code symbols of main control unit is signal pulse width, two kinds of signal pulse width t1 and t2 should differ 3-5 and doubly be advisable, t1 and t2 has big difference increases the power consumption of acoustic marker, differ the too small differentiation affecting code element, the period distances that signal is launched is fixed value T, signal frequency is that fixed value f, signal pulse width t1 and t2 represent code symbols " 0 " and " 1 " respectively, exports according to the coded message circulation of beacon.

Acoustic marker main control unit software flow is: after software completes initialization, by coded message assignment unique for beacon to the relevant parameter in software, then be shifted by coded message according to " 0 " or " 1 " sequence of coded message, circulation exports the code element of present bit, and the output time between code element is spaced apart T.

When code element is signal frequency, the symbol output signal of present bit is pulse width fixed value t, fill frequency f 1 (coded message present bit is " 0 ") or fill frequency f 2 (coded message present bit is " 1 "), when code element is signal pulse width.The symbol signal of present bit fills frequency fixed value f, pulse width t1 (coded message present bit is " 0 ") or pulse width t2 (coded message present bit is " 1 ").

The coded signal that the main control unit of each beacon produces is unique, and under specific demand, main control unit postpones certain hour signal source output after entering water by change software simulating acoustic marker.Acoustic marker adopts powered battery, according to working time requirement, can select the battery of different capabilities.