Language
|
| Hoeveelheid: | |
|---|---|
Piezohans
Voorraad 80Khz Onderwater Akoestiese Transducers Hidrofoon
1.Meettoestande
afstand te meet |
1m ~ 3m |
diepte meet |
1m ~ 3m |
2. Meting inhoud:
2.1. Spanning-emissiereaksie en klankbronvlak:
Meet die emissiereaksie binne 50kHz ～ 110kHz, en die klankbronvlak by 80kHz is nie minder nie as 185dB.
2.2. Ontvang sensitiwiteit
Meet die ontvangsensitiwiteit binne 50kHz ～ 110kHz, nie minder nie as -215dB.
2.3. Rigting
Horisontale rigting: Horisontale omnirigting by 80kHz.
2.4. Hidrostatiese druk: 4MPa.
1. Meetdata
Daar is altesaam 2 transducers, 1# (sonder kabel) en 2# (met 20m kabel).
Oordragspanningsreaksie en ontvangsensitiwiteit (dB)
reaksie |
sensitiwiteit |
|||
f/kHz |
1# |
2# |
1# |
2# |
50.0 |
138.5 |
138.7 |
-208.9 |
-209.4 |
52.0 |
139.0 |
139.3 |
-208.3 |
-208.3 |
54.0 |
139.4 |
139.3 |
-208.8 |
-208.2 |
56.0 |
140.7 |
140.5 |
-208.6 |
-208.3 |
58.0 |
141.4 |
141.7 |
-208.1 |
-208.8 |
60.0 |
142.0 |
142.3 |
-208.6 |
-209.5 |
62.0 |
142.9 |
143.1 |
-209.5 |
-208.7 |
64.0 |
143.5 |
143.8 |
-208.6 |
-208.4 |
66.0 |
143.8 |
144.2 |
-209.8 |
-209.8 |
68.0 |
144.0 |
144.6 |
-208.1 |
-209.2 |
70.0 |
144.4 |
144.8 |
-209.6 |
-209.7 |
72.0 |
143.7 |
145.5 |
-209.2 |
-209.7 |
74.0 |
144.2 |
146.2 |
-208.9 |
-210.2 |
76.0 |
145.5 |
146.2 |
-210.0 |
-211.0 |
78.0 |
145.0 |
146.0 |
-209.9 |
-211.0 |
80.0 |
144.6 |
146.5 |
-209.5 |
-210.5 |
82.0 |
145.3 |
146.2 |
-209.6 |
-210.8 |
84.0 |
144.1 |
146.2 |
-209.0 |
-210.7 |
86.0 |
143.9 |
146.0 |
-209.0 |
-210.1 |
88.0 |
144.0 |
146.0 |
-210.2 |
-211.1 |
90.0 |
144.4 |
145.5 |
-210.5 |
-211.5 |
92.0 |
144.2 |
144.2 |
-210.8 |
-211.8 |
94.0 |
140.0 |
141,3 |
-211.2 |
-211.9 |
96.0 |
143.7 |
143.8 |
-211.4 |
-212.2 |
98.0 |
143.8 |
143.5 |
-211.6 |
-212.4 |
100.0 |
142.9 |
142.6 |
-212.0 |
-212.7 |
102.0 |
142.5 |
142.9 |
-212.3 |
-213.0 |
104.0 |
141.9 |
141.8 |
-212.6 |
-213.2 |
106.0 |
141.4 |
141.8 |
-212.8 |
-213.4 |
108.0 |
141.0 |
141,3 |
-213.2 |
-213.8 |
110.0 |
141.2 |
141.0 |
-213.4 |
-213.7 |
f/kHz |
d/m |
UF/VPP |
UJ/mVPP |
M0 |
SvL/dB |
SL/dB |
|
1# |
80 |
1 |
320 |
220 |
-207.5 |
144.2 |
185.3 |
2# |
80 |
1 |
260 |
220 |
-207.5 |
146.0 |
185.3 |
3.4. Hidrostatiese druk toets
Nadat die transducer die 4MPa/1h, 0MPa/0.25h, 4MPa/1h, 0MPa/0.25 hidrostatiese druktoets geslaag het, is die isolasieweerstand tussen die positiewe en negatiewe elektrodes van die transducer groter as 500M Ω.
Oordragspanningsreaksie en ontvangsensitiwiteit (dB)
f/kHz |
Antwoord |
S sensitiwiteit |
||
1# |
2# |
1# |
2# |
|
35 |
128.6 |
127.9 |
-189.5 |
-199.8 |
36 |
129.4 |
129.8 |
-190.2 |
-200 |
38 |
131.2 |
130.5 |
-190.2 |
-199.7 |
40 |
133 |
132.8 |
-190 |
-199.6 |
42 |
134.8 |
135.1 |
-189.9 |
-198.7 |
44 |
136 |
135.7 |
-189.8 |
-198.6 |
46 |
136.2 |
136.1 |
-189.8 |
-198.2 |
48 |
135.7 |
135.4 |
-189.9 |
-199.2 |
50 |
134.7 |
134.3 |
-190.1 |
-199.6 |
52 |
133.7 |
134.2 |
-190.4 |
-199.3 |
54 |
132.7 |
132.6 |
-190.7 |
-199.1 |
56 |
131.8 |
131.6 |
-191.3 |
-200.5 |
58 |
131 |
130.9 |
-191.9 |
-201.3 |
60 |
130.3 |
130.3 |
-192.6 |
-201.5 |
62 |
130.5 |
130.1 |
-192 |
-201.6 |
64 |
129.7 |
129.5 |
-191.8 |
-202 |
65 |
129.5 |
128.9 |
-192 |
-201.8 |
f/kHz |
d/m |
UF/VPP |
UJ/mVPP |
M0 |
SvL/dB |
SL/dB |
|
1# |
50 |
1 |
580 |
140 |
-206.9 |
134.6 |
180.8 |
2# |
50 |
1 |
605 |
140 |
-206.9 |
134.2 |
180.8 |
Die sensitiwiteit van die 2#-omskakelaar is ongeveer -200dB, wat laer is as die indeksvereiste, wat veroorsaak word deur die verswakking nadat die 20m verlengde kabel verbind is.Volgens die formule 
,is die beskikbare verswakking ongeveer 10.8dB. As hierdie verswakking verwyder word, kan die sensitiwiteit van die 2#-omskakelaar aan die indeksvereistes voldoen.
