CN102004245A - Remote double-beam laser ultrahigh alarm device for ship - Google Patents

Abstract

The invention relates to a remote double-beam laser ultrahigh alarm device for a ship, comprising at least two laser transmitters and laser receivers matched with the laser transmitters, wherein each laser transmitter transmits laser beams with corresponding frequencies to each laser receiver; and each laser receiver is respectively connected with an alarm. By taking the limitation that laser light is interrupted by an ultrahigh ship or not as a basic principle, the alarm device generates an alarm signal when the laser light is interrupted by the ultrahigh ship so as to monitor the heights of all navigation ships passing through medium-and-large-sized bridges and alarm the ultrahigh ships endangering the safety of the bridges. Meanwhile, the invention solves the false alarm caused by the shake of the laser due to the remote laser receiving of large-sized rivers and ultrahigh erection of the lasers of the large-sized bridges; the alarm can be generated because the double-beam laser is simultaneously interrupted off so as to reduce the false alarm due to fly birds and the like; and the alarm device can be used for modulating and demodulating the laser frequency so as to reduce the false alarm due to the other electromagnetic waves and light.

Description

Remote double beams laser boats and ships superelevation warning device

Technical field

The present invention relates to the laser warning field, especially a kind of remote double beams laser boats and ships superelevation warning device.

Background technology

Along with fast development of national economy, water surface bridge is hit the serious accident of collapsing by ultrahigh ship and happens occasionally, and brings great economic loss for socioeconomic normal operation and lives and properties, has also caused abominable social influence.Therefore, adopting technological means that intelligent early-warning is in advance carried out in the danger that the generation ultrahigh ship hits bridge, ensure the trouble-free operation of main artey of communications, is present pressing for.

As shown in Figure 1, laser correlation blocking alarm is applied to occasions such as vehicular bridge, tunnel usually, and the height of traffick is monitored, operating distance generally is no more than 100 meters, antenna height has only several meters, and with this understanding, simple laser correlation blocking alarm can normally play a role.And for medium-and-large-sized water surface bridge, water surface width can reach 2～3KM, the monitoring height can reach 20～30M, and the water surface often has large-scale flying bird flight, with this understanding, laser pick-off partly is difficult to aim at, owing to be erected at eminence, slightly rocking of the Laser emission pedestal that high wind causes can make laser beam depart from, and causes the received signal of receiver to interrupt causing wrong report, the light beam of large-scale flying bird flight blocking also can cause wrong report, and the reflexion of wave of various light and electromagnetism clutter also can cause wrong report on the water.

Summary of the invention

The object of the present invention is to provide and a kind ofly can realize remote, hypervelocity Realtime Alerts, avoid the remote double beams laser boats and ships superelevation warning device of false alarm.

For achieving the above object, the present invention has adopted following technical scheme: a kind of remote double beams laser boats and ships superelevation warning device, comprise at least two generating lasers and the laser pickoff that matches with it, each generating laser sends the laser beam of corresponding frequencies to each laser pickoff, and each laser pickoff all links to each other with alarm.

As shown from the above technical solution, whether the present invention is interdicted by ultrahigh ship with laser beam is ultimate principle, when being blocked by ultrahigh ship, laser beam produces alerting signal, all are monitored by the navigation boats and ships height under the medium-and-large-sized bridge, the ultrahigh ship that jeopardizes bridge security is carried out Realtime Alerts.Solve simultaneously that the Large River long distance laser receives and large bridge laser instrument superelevation is set up the laser instrument that causes and rocked the wrong report that causes; The double beams laser while is just produced by blocking and reports to the police the wrong report that minimizing flying bird etc. causes; Laser frequency is carried out modulation and demodulation, reduce the wrong report that other electromagnetic waves and light cause.

Description of drawings

Fig. 1 is the circuit block diagram of existing laser correlation blocking alarm;

Fig. 2 is the circuit block diagram of generating laser among the present invention;

Fig. 3 is the circuit block diagram of laser pickoff among the present invention and alarm.

Embodiment

A kind of remote double beams laser boats and ships superelevation warning device, thelaser pickoff 20 that comprises at least two generatinglasers 10 and match with it, each generatinglaser 10 sends the laser beam of corresponding frequencies to eachlaser pickoff 20, eachlaser pickoff 20 all links to each other withalarm 30, shown in Fig. 2,3.Laser penetrate blocking report to the police be utilize be that laser beam divergent angle is little, good directionality, light beam are concentrated, power density is big, light penetration power is strong, developed by characteristics such as interference such as sunshine, light, rain, mist, snow, sand and dust, electromagnetism, thunder and lightning, electric wave are little, therefore, as a kind of light source as correlation, laser has incomparable superiority.When laser beam was blocked by the object of process, laser pick-off did not partly have laser beam and receives and produce alerting signal.

In conjunction with Fig. 2,3, described generatinglaser 10 comprises being installed in to be monitored section one bank and is first and second generating laser of alignment up and down, double beams laser parallel emission separated by a distance and reception up and down, the setting height(from bottom) of first and second generating laser is the safe passing height of bridge, is foundation the superelevation ship is adopted right measures to evade danger.Describedlaser pickoff 20 comprises first and second laser pickoff that is installed in monitoring opposite bank, section, and first laser pickoff and first generating laser are in same horizontal line, and second laser pickoff and second generating laser are in same horizontal line.The transmission frequency modulation of first and second generating laser makes laser launch with characteristic frequency, and the two bundle laser that first and second generating laser sends are launched with different frequency.

In conjunction with Fig. 2,3, described generatinglaser 10 comprisesclock circuit 11,clock circuit 11 sends the pulse signal of certain frequency to pulseshaping circuit 12,pulse shaping circuit 12 links to each other withpulsed laser 14 bydriving circuit 13,tank circuit 15 is to pulsedlaser 14 power supplies, pulsedlaser 14 expands minuslens 16 by collimator and extender and sends laser beam, laser beam is launched with certain adjustable spread angle, guaranteed under the situation thatlaser pickoff 20 rocks, also can receive laserbeam.Clock circuit 11 is according to the requirement of detection system to transmission frequency, and the pulse signal that produces certain frequency mails to pulseshaping circuit 12; The pulse signal of 12 pairs of receptions of pulse shaping circuit carries out shaping;Driving circuit 13 sends the laser beam of certain frequency according to shaped pulse signal drives pulsedlaser 14;Tank circuit 15 provides sufficient charge, and during with the assurance circuit working, moment produces big current drivepulses laser instrument 14.

In conjunction with Fig. 2,3, describedlaser pickoff 20 comprisesreceiver 23,receiver 23 is by grating 21,optical filter 22 receives the laser beam that generatinglaser 10 sends,receiver 23 output electric pulses are to amplifying and filteringcircuit 24, amplify withfiltering circuit 24 and will be sent to comparer 25 through the electric signal after amplifying, comparer 25 outputs surpass the electric signal of threshold level tofrequency demodulation circuit 26, laser frequency after thefrequency demodulation circuit 26 output demodulation is tofrequency comparison circuit 27, the laser frequency thatfrequency comparison circuit 27 sends the laser frequency after the demodulation and generatinglaser 10 compares and judges whether that occurrence frequency interrupts, if interrupt, expression is interdicted, otherwise, expression is not interdicted, andfrequency comparison circuit 27 sends the blocking alarm signal to alarm 30.Optical filter 22 focuses onreceiver 23 after filtering out other interference light of most of non-optical maser wavelength; The laser beam of the avalanche diode collectiong focusing ofreceiver 23 also is transformed into electric signal; Amplification will receive the feeble signal of coming withfiltering circuit 24 and carry out secondary amplification and clutter filtration;Frequency demodulation circuit 26 carries out demodulation with signal, gets rid of other frequency interferences and judges whether laser signal is interdicted.

In conjunction with Fig. 2,3, be provided with and everycircuit 31 in the describedalarm 30, thefrequency comparison circuit 27 of first and second laser pickoff all send the blocking alarm signal to everycircuit 31,alarm 30 adopts sound and light alarms.With everycircuit 31 with two obstruction signals sent of bundle laser with, have only two bundle laser to be interdictedalarms 30 simultaneously and just send alerting signal.

The present invention expands bundle with laser beam and expands technology such as angle, laser frequency modulation and demodulation, laser optics filtering, laser signal amplification, double beams laser judgement, solved that medium-and-large-sized bridge water is remote, the Laser emission under the conditions such as height sets up, high interference with receive decision problem, for bridge security provides powerful guarantee.

Claims (5)

1. remote double beams laser boats and ships superelevation warning device, it is characterized in that: the laser pickoff (20) that comprises at least two generating lasers (10) and match with it, each generating laser (10) sends the laser beam of corresponding frequencies to each laser pickoff (20), and each laser pickoff (20) all links to each other with alarm (30).

2. remote double beams laser boats and ships superelevation warning device according to claim 1, it is characterized in that: described generating laser (10) comprises and is installed in monitoring section one bank and is first of alignment up and down, the dual-laser transmitter, first, the setting height(from bottom) of dual-laser transmitter is the safe passing height of bridge, described laser pickoff (20) comprises being installed in monitors first of opposite bank, section, the dual-laser receiver, first laser pickoff and first generating laser are in same horizontal line, and second laser pickoff and second generating laser are in same horizontal line.

3. remote double beams laser boats and ships superelevation warning device according to claim 1, it is characterized in that: described generating laser (10) comprises clock circuit (11), clock circuit (11) sends the pulse signal of certain frequency to pulse shaping circuit (12), pulse shaping circuit (12) links to each other with pulsed laser (14) by driving circuit (13), tank circuit (15) is to pulsed laser (14) power supply, and pulsed laser (14) expands minus lens (16) by collimator and extender and sends laser beam.

4. remote double beams laser boats and ships superelevation warning device according to claim 1, it is characterized in that: described laser pickoff (20) comprises receiver (23), receiver (23) is by grating (21), optical filter (22) receives the laser beam that generating laser (10) sends, receiver (23) output electric pulse is to amplifying and filtering circuit (24), amplify with filtering circuit (24) and will be sent to comparer (25) through the electric signal after amplifying, comparer (25) output surpasses the electric signal of threshold level to frequency demodulation circuit (26), laser frequency after frequency demodulation circuit (26) the output demodulation is to frequency comparison circuit (27), the laser frequency that frequency comparison circuit (27) sends the laser frequency after the demodulation and generating laser (10) compares and judges whether that occurrence frequency interrupts, and frequency comparison circuit (27) sends the blocking alarm signal to alarm (30).

5. according to claim 2 or 4 described remote double beams laser boats and ships superelevation warning devices, it is characterized in that: be provided with and every circuit (31) in the described alarm (30), the frequency comparison circuit of first and second laser pickoff (27) all send the blocking alarm signal to every circuit (31), alarm (30) adopts sound and light alarm.

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