in noul ordin sunt interzise folosirea in Delta a " aparatelor hidroacustice de detectie a pestilor "
ce sunt aparatele aceste ca eu n-am auzit, sau se refera la sonare cumva ?
ca sonarele numai hidroacustice nu sunt......
sonare interzise ?
Moderatori: Adelin, johnnybravo, dr.pike, tudor, Moderatori
sonare interzise ?
Ultima oară modificat 21 Apr 2005, 16:07 de către danr, modificat 1 dată în total.
eu cred sonarele noastre au detectie radio, similar radarelor pentru avioane
emit un fascicul radio si interpreteza reflexiile radio
aparatele hidroacustic probabil interpreteaza vibratiile - zgomotele proprii emise in apa de corpuri terte....
poate un fizician sa ne lamureasca, dar dupa mine sonarele nu sunt hidroacustice
emit un fascicul radio si interpreteza reflexiile radio
aparatele hidroacustic probabil interpreteaza vibratiile - zgomotele proprii emise in apa de corpuri terte....
poate un fizician sa ne lamureasca, dar dupa mine sonarele nu sunt hidroacustice
din ce am citit despre sonare stiam ca folosesc unde infrasunete si actioneaza gen reflexie de unda trimisa din sonar catre fundul apei
de aici concluzia ca infrasunet este legat de audio si avand in vedere mediul de lucru apa "hidro"
de aici concluzia ca infrasunet este legat de audio si avand in vedere mediul de lucru apa "hidro"
Clubul Sportiv al Pescarilor de Rapitori
Daca accepti orice , asteapta-te la orice ! 14
Daca accepti orice , asteapta-te la orice ! 14
-
wilddanube
- veteran
- Mesaje: 1255
- Membru din: 04 Aug 2004, 09:57
- Localitate: Delta Dunarii
- Contact:
-
Borealis Fly
- veteran
- Mesaje: 506
- Membru din: 28 Iun 2004, 08:57
- Localitate: NYKOPING; SUEDIA
- Contact:
revin si corectez ...
The word "sonar" is an abbreviation for "SOund, NAvigation and Ranging." It was developed as a means of tracking enemy submarines during World War II. A sonar consists of a transmitter, transducer, receiver and display.
In the simplest terms, an electrical impulse from a transmitter is converted into a sound wave by the transducer and sent into the water. When this wave strikes an object, it rebounds. This echo strikes the transducer, which converts it back into an electric signal, which is amplified by the receiver and sent to the display. Since the speed of sound in water is constant (approximately 4800 feet per second), the time lapse between the transmitted signal and the received echo can be measured and the distance to the object determined. This process repeats itself many times per second.
The frequencies most often used by Lowrance in our sonar are 192 - 200 kHz (kilohertz); we also make some units that use 50 kHz. Although these frequencies are in the sound spectrum, they’re inaudible to both humans and xxx. (You don’t have to worry about the sonar unit spooking the xxx - they can’t hear it.)
As mentioned earlier, the sonar unit sends and receives signals, then “prints� the echo on the display. Since this happens many times per second, a continuous line is drawn across the display, showing the bottom signal. In addition, echoes returned from any object in the water between the surface and bottom are also displayed. By knowing the speed of sound through water (4800 feet per second) and the time it takes for the echo to be received, the unit can show the depth of the water and any xxx in the water.
The word "sonar" is an abbreviation for "SOund, NAvigation and Ranging." It was developed as a means of tracking enemy submarines during World War II. A sonar consists of a transmitter, transducer, receiver and display.
In the simplest terms, an electrical impulse from a transmitter is converted into a sound wave by the transducer and sent into the water. When this wave strikes an object, it rebounds. This echo strikes the transducer, which converts it back into an electric signal, which is amplified by the receiver and sent to the display. Since the speed of sound in water is constant (approximately 4800 feet per second), the time lapse between the transmitted signal and the received echo can be measured and the distance to the object determined. This process repeats itself many times per second.
The frequencies most often used by Lowrance in our sonar are 192 - 200 kHz (kilohertz); we also make some units that use 50 kHz. Although these frequencies are in the sound spectrum, they’re inaudible to both humans and xxx. (You don’t have to worry about the sonar unit spooking the xxx - they can’t hear it.)
As mentioned earlier, the sonar unit sends and receives signals, then “prints� the echo on the display. Since this happens many times per second, a continuous line is drawn across the display, showing the bottom signal. In addition, echoes returned from any object in the water between the surface and bottom are also displayed. By knowing the speed of sound through water (4800 feet per second) and the time it takes for the echo to be received, the unit can show the depth of the water and any xxx in the water.
Clubul Sportiv al Pescarilor de Rapitori
Daca accepti orice , asteapta-te la orice ! 14
Daca accepti orice , asteapta-te la orice ! 14
salut dane!
da-l incolo de fizician! e destul de clar...ca doar nu s-a referit ca n-avem voie cu submarinu'...adica... cum spune borealis fly, vom citi apa...numai ca pe apele astea mari...dunare, olt, amazon...precum si in albiile secate de pe marte , este tare bun un sonar... cu cititu' cam greu
altfel spus; aparatele(sonarele) noastre detecteaza pesti, ceea ce cred ca este o mare crima daca s-a dat ordin sa cautam fundul apei cu ancora.
cu stirea asta mi-ati inmormantat ziua.
da-l incolo de fizician! e destul de clar...ca doar nu s-a referit ca n-avem voie cu submarinu'...adica... cum spune borealis fly, vom citi apa...numai ca pe apele astea mari...dunare, olt, amazon...precum si in albiile secate de pe marte , este tare bun un sonar... cu cititu' cam greu
altfel spus; aparatele(sonarele) noastre detecteaza pesti, ceea ce cred ca este o mare crima daca s-a dat ordin sa cautam fundul apei cu ancora.
cu stirea asta mi-ati inmormantat ziua.In articolul respectiv se face referire la pescuitul industrial......
Art. 4. - In activitatea de pescuit in scop comercial se interzice folosirea:
...
l) aparatelor hidroacustice de detectie a pestilor, in perimetrul Rezervatiei Biosferei .Delta Dunarii ;
...
"Pestii se prind cu undita, iar oamenii cu vorba." - Shakespeare
-
wilddanube
- veteran
- Mesaje: 1255
- Membru din: 04 Aug 2004, 09:57
- Localitate: Delta Dunarii
- Contact: