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Piezohannas
Stok Hidrofon Transduser Akustik Bawah Air 80Khz
1.Syarat pengukuran
mengukur jarak |
1m ～ 3m |
mengukur kedalaman |
1m ～ 3m |
2. Kandungan ukuran:
2.1. Tindak balas pelepasan voltan dan tahap sumber bunyi:
Ukur tindak balas pelepasan dalam 50kHz ～ 110kHz, dan tahap sumber bunyi pada 80kHz tidak kurang daripada 185dB.
2.2. Menerima sensitiviti
Ukur sensitiviti penerima dalam 50kHz ～ 110kHz, tidak kurang daripada -215dB.
2.3. Directivity
Arah mendatar: Mendatar omnidirectional pada 80kHz.
2.4. Tekanan hidrostatik: 4MPa.
1. Data pengukuran
Terdapat 2 transduser kesemuanya, 1# (tanpa kabel) dan 2# (dengan kabel 20m).
Menghantar tindak balas voltan dan menerima sensitiviti (dB)
tindak balas |
sensitiviti |
|||
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. Ujian tekanan hidrostatik
Selepas transduser melepasi ujian tekanan hidrostatik 4MPa/1j, 0MPa/0.25j, 4MPa/1j, 0MPa/0.25, rintangan penebat antara elektrod positif dan negatif transduser adalah lebih besar daripada 500M Ω.
Menghantar tindak balas voltan dan menerima sensitiviti (dB)
f/kHz |
R respons |
S kepekaan |
||
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 |
Kepekaan transduser 2# adalah kira-kira -200dB, yang lebih rendah daripada keperluan indeks, yang disebabkan oleh pengecilan selepas menyambungkan kabel lanjutan 20m. Menurut formula 
,Pengecilan yang tersedia ialah kira-kira 10.8dB. Jika pengecilan ini dialih keluar, sensitiviti transduser 2# boleh memenuhi keperluan indeks.
