JJG 1017-2007Verification Regulation of Standard Hydrophones in the Frequency Range 1 kHz~1 MHz (English PDF)

3.1 Reciprocal transducers electric terminal (1)

3.2 Transducer for electrical transfer impedance (1)

3.3 Electrical transfer impedance mode (2)

3.4 Open circuit voltage hydrophone (2)

3.5 Reference Center (2)

5.1 Free field [voltage] Sensitivity [level] (2)

5.2 Free-field frequency response sensitivity level (2)

6.1 Appearance structure (2)

6.2 Adaptability of work (2)

6.3 of the work (3)

6.4 Mark and factory calibration data (3)

7.1 Test conditions (3)

7.2 Verification Project (4)

7.3 Verification Methods (5)

7.4 Test results processing (10)

7.5 Test cycle (10)

Appendix A pulse sound calibration technology (11)

Mutual authentication (13) The Method of test conditions to Appendix B Appendix C electric load correction (15) Appendix D calibration certificate and test results of notice-page format (16) Measurement Uncertainty Appendix E Examples (18) 1kHz ~ 1MHz hydrophone standard test procedures the regulations refer to the International Electrotechnical Commission IEC 60565Ed.2.2006 "underwater acoustic hydrophone 0.01Hz ~ 1MHz frequency range calibration "in the free-field reciprocity calibration method.

1 Scope

The order applies to frequencies within the range of 1kHz ~ 1MHz initial verification standard hydrophone, and make follow-up test with the test. Within the frequency range of the transmitter to transmit the current response standard level calibration can also be implemented by reference.

2 Citations

The regulations cited in the following documents.

GB/T 3102.7-1993 "acoustic volume and unit" GB/T 3223-1994 "acoustic underwater acoustic transducer free-field calibration method" GB/T 3947-1996 "Acoustics terminology" GB/T 4128-1995 "Acoustics Standard hydrophone" GJB1727-1993 "IF a standard hydrophone test procedures" JJF1001-1998 "common measurement terms and definitions" JJF1034-2005 "Acoustic measurement terminology and definitions" JJF1059-1999 "Measurement Uncertainty and indicates" IEC 60565Ed.2.2006, Underwateracoustics-hydrophones-calibrationinthefrequency range0.01Hzto1MHz when using this procedure, it should pay attention to using the currently valid version of the documents cited.

3 terminology and units of measurement the procedure adopted GB/T 3947-1996, JJF1001-1998, JJF1034-2005 regarding terms and definitions.

This procedure uses quantities and units GB/T 3102.7-1993 prescribed.

In the present statutes, if not explained, all the voltage, current, sound pressure refers to a valid value.

3.1 reciprocal transducers electric terminal (electricalterminalsofareciprocaltransducer) Measuring the electrical terminals of the emission current measured open circuit voltage of the electric terminal as a transmitter and is used as a hydrophone.

Note. If the transducer is immersed in water, the lowest electrical impedance between the end of the water is known as "low", and the other end is called the "high end." 3.2 transducer for electrical transfer impedance (electricaltransferimpedanceofatransducerpair) when the transmitter and hydrophone placed in the free sound field, its axis in a straight line and on time for each other, both ends of the hydrophone Open instantaneous voltage and instantaneous current through the emitter complex than that.

Unit. ohm, ohm.

Note.

1. Electrical transfer impedance is complex.

2. Due to the transfer of electrical impedance of the sound field conditions, the transmitter and the hydrophone electrical load, and therefore, together with the relevant conditions and electrical voltage Measuring end of the stream should be noted.