JP3202047B2 - Large depth transducer sensitivity measurement system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensitivity measuring apparatus for a transducer as an acoustic sensor, and more particularly, to a sensitivity measuring apparatus for a deep transducer capable of automatically measuring the sensitivity of a transducer at a large depth. It is about.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a conventional transducer sensitivity measuring apparatus. In the figure, 1 is an oscillator, 2 is a frequency counter for monitoring the oscillation frequency of this oscillator 1, 3
Is the power amplifier, 4A (and 4B) is the power amplifier 3
, A standard transmitter (and a test transmitter) that emits a specified sound pressure into the water 5, an attenuator 6 that attenuates the output of the power amplifier 3 as a reference voltage, 7 A (and 7 A).
B) is installed at a prescribed distance (usually 1 m) from the standard transmitter 4A (or the test transmitter 4B),
A test receiver (or a standard receiver) for receiving the sound pressure transmitted from the test transmitter (or the test transmitter 4B), 8 is an output of the attenuator 6, or a test receiver 7A (or a standard receiver). Receiver 7B)
Is a line switch for switching and outputting the output, 9 is an amplifier for amplifying the voltage, 10 is a bandpass filter for selecting a received signal of only the transmission frequency, and 11 is a level meter for measuring the signal strength.

[0003] Next, a description will be given of a case where the sensitivity measuring apparatus for a transducer having the above configuration is measured by a comparative calibration method. First, when measuring the receiving sensitivity of the test receiver 7A,
The oscillation frequency of the oscillator 1 is monitored by the frequency counter 2 and output to the power amplifier 3 at a specified oscillation frequency. The power amplifier 3 power-amplifies the signal having the specified oscillation frequency and outputs the signal. Then, the standard transmitter 4A receives the signal of the specified oscillation frequency and emits a specified sound pressure into the water 5.

On the other hand, the attenuator 6 inputs a signal having a specified oscillation frequency output from the power amplifier 3 as a reference voltage, attenuates the signal, and outputs the signal to the switch 8. On the other hand, the test receiver 7
A receives the sound pressure transmitted from the standard transmitter 4A and outputs a received signal to the switch 8. Then, the signal passed through the switch 8 is amplified by an amplifier 9, and then a reception signal having only a transmission frequency is selected by a bandpass filter 10 and output to a level meter 11. Then, the signal strength can be measured by the level meter 11. At this time, the switch 8 is switched to the a side or the b side to vary the attenuation of the attenuator 6 so that the value of the level meter 11 becomes the same, the attenuation at that time is read, and the sensitivity product data and I do. Then, the reception sensitivity of the test receiver 7A can be measured by subtracting the transmission sensitivity of the standard transmitter 4A at the current frequency from the sensitivity product data.

Next, when measuring the transmission sensitivity of the test transmitter 4B, the test transmitter 4B is connected in place of the standard transmitter 4A, and the standard receiver is used in place of the test receiver 7A. The wave device 7B is connected. Then, as described above, the switch 8 is set to the a side or the b side.
Side, the attenuation of the attenuator 6 is varied so that the value of the level meter 11 becomes the same, and the attenuation at that time is read to obtain sensitivity product data. And the standard receiver 7B
By subtracting the reception sensitivity at the current frequency from the sensitivity product data, the transmission sensitivity of the test transmitter 4B can be measured.

In the above description, the measurement of the reception sensitivity of the test receiver 7A and the measurement of the transmission sensitivity of the test transmitter 4B are performed by the comparative calibration method. If it does, it is described in the Basics and Applications of Ocean Sound by Motoyoshi Okushima published by the Ocean Acoustics Society on March 1, 1984,
Of course, it can be measured by this.

[0007]

However, in any of the above-described methods, in a measurement at a large depth, it is necessary to suspend a mounting device of a transmitter and a receiver facing each other and perform measurement. Its depth is limited to about 100m. Moreover, even at a depth of 100 m, there is a disconnection of the suspended object due to the tide, and a entanglement of the suspended rope and the signal cable from the transducer. In addition, the measurement quality also has a problem that there are many factors that deteriorate the measurement quality, such as the influence of extending the signal cable from the water surface to the measurement depth and its correction.

The present invention eliminates the above-mentioned problem that the calibration of the transducer sensitivity at a large depth is impossible.
It is an object of the present invention to provide an excellent apparatus capable of automatically performing large-depth sensitivity measurement and performing any of sensitivity comparison calibration and mutual calibration.

[0009]

According to a first embodiment of the present invention, there is provided a deep depth transmitter / receiver sensitivity measuring apparatus for transmitting, to an observation ship, measurement parameters required for sensitivity measurement, and a measurement transmitted thereto. A data analysis device for analyzing the results, equipped with an underwater sound pressure gauge having a receiver suspended in the water and receiving a pinger sound, the main body suspended underwater from the observation ship by a suspension cable, Receives and analyzes measurement parameters sent from the data analyzer prior to measurement, stores the data required for sensitivity measurement, and receives the detection signal output from the pressure detector and outputs the necessary command signal. A controller, a pinger that outputs a pinger sound for notifying the observation ship of the start and end of the measurement, etc., and a transmitter and a receiver supported at predetermined intervals, and hoisting and unwinding the suspension cable By the book Suspended from the depth was set performs a sensitivity measurement.

In the second embodiment, the observation vessel is provided with means for sending measurement parameters necessary for sensitivity measurement and a data analyzer for analyzing the measurement results sent thereto. The measurement device receives and analyzes the measurement parameters sent from the data analysis device prior to the measurement, stores data necessary for sensitivity measurement, receives a detection signal output from the pressure detector, and receives a necessary command signal. The main body internal controller which outputs the data, a depth management means, and an underwater position holding device which descends and ascends by itself, and performs sensitivity measurement by moving the diving / measuring device to a set depth.

[0011]

The present invention automatically moves to the set depth, and can autonomously start and stop the measurement, manage the measurement depth, and process calibration data.

[0012]

FIG. 1 is a block diagram showing one embodiment of a deep-depth transmitter / receiver sensitivity measuring apparatus according to the present invention. As an example, a cabled type deep-depth transmitter / receiver sensitivity measuring apparatus is shown. In the figure, 1
2 outputs measurement parameters such as transmitter / receiver number using the sensitivity calibration method, number of measurement depth layers, measurement frequency points, etc., and analyzes the measurement results sent from the following controller in the main unit before measurement 13 is an underwater sound pressure gauge, 14 is a winch for hoisting and rewinding the suspension cable 15, 16 is an observation ship equipped with the data analysis apparatus 12, the underwater sound pressure gauge 13 and the winch 14, and 17 is an underwater ship. 5
Underwater sound pressure meter 1
3, a receiver 18 is fixed to the other end of the suspension cable 15, and a main body composed of a water-resistant housing having a built-in controller 19 shown in FIG. 2 is fixed to the main body 20. A pinger 21 for outputting a pinger sound for notifying the observation ship 16 of start, stop, etc., is fixed to the main body 18, and has a standard transmitter 4A.
(Or a test transmitter 4B) and a test receiver 7A (or a standard receiver 7B) at predetermined intervals.

In the in-body controller 19 shown in FIG. 2, a signal cable 22 has one end connected to the underwater communication connector 23 and the other end connected to the data analyzer 12.
A to 24D are underwater connectors for connection, 25 is for decoding the measurement parameters sent from the data analyzer 12 prior to the measurement, storing the measurement mode, the number of measurement depth layers, the measurement frequency points, and the like, and Controller that outputs a command signal for sensitivity measurement using an algorithm that performs
6 is a data logger for logging the analysis result of the following frequency characteristic analyzer, 27 is a process input / output device, and 28 is a controller 2
The frequency characteristic analyzer of the FFT system in which the measurement frequency, the average number of data, the output level of the oscillator, and the like read out from the FFT 5 are input through the process input / output device 27. The output sound 29 from the standard transmitter 4A An equalizer 30 having a characteristic that makes the pressure characteristic substantially flat with respect to the frequency. The S / N 30 is sufficient for transmission and reception between the standard transmitter 4A and the test receiver 7A.
A power amplifier for exciting the standard transmitter 4A so as to obtain a ratio, a switch 31 for selectively switching to a transmission mode or a reception mode, 32 a pressure detector for measuring the depth of the main body 18, Reference numerals 33 and 34 denote a power supply unit and a battery for supplying necessary power to each unit of the controller 19 in the main body.

Next, the operation of the deep-depth transducer sensitivity measuring apparatus having the above configuration will be described. First, the test receiver 7
When measuring the receiving sensitivity of A, one end of the communication cable 22 is connected to the data analyzer 12 on the observation ship 16, and the other end of the communication cable 22 is connected to the underwater connector 23 for communication.
The data analyzer 12 and the controller 19 in the main body are connected via the communication cable 22. Prior to the measurement, the data analysis device 12 controls measurement parameters such as a transmitter / receiver number using a sensitivity calibration method, the number of measurement depth layers, and a measurement frequency point by the controller 19 in the main body via the communication cable 22. To the device 25. The communication method at this time is RS-232C, SAIL,
Of course, any communication method may be used. Therefore, the controller 25 of the controller 19 in the main body
Receives and decodes these measurement parameters,
The number of measurement depth layers, measurement frequency points, and the like are stored. Then, the communication cable 22 is detached from the underwater communication connector 23 of the controller 19 in the main body on the observation boat 16. Then, the suspension cable 15 is extended by the winch 14 and the main body 18 is suspended deep underwater.

On the other hand, the controller 25 of the in-body controller 19 sends the standard transmitter 4 to the switch 31 via the process input / output unit 27.
A and the test receiver 7A are connected. Then, the body 18 gradually increases in depth through the suspension cable 15 by the winch 14, and the pressure detector 32 constantly detects the suspension depth. When the suspension depth reaches the set depth, the controller 25 switches the process input / output device 27.
A measurement start command is issued to the frequency characteristic analyzer 28 via the above-mentioned parameters in accordance with the set parameters. When the measurement in accordance with the parameter settings is completed, the frequency characteristic analyzer 28 issues an end command to the controller 25. For this reason, the controller 25 transmits the analysis result to the data logger 26.
Record sequentially. Then, when the recording of the data logger 26 is completed, a measurement termination pinger sound emission command is issued to the pinger 20. Therefore, the pinger 20 emits a pinger sound in response to the input of this command. This pinger sound is received by the receiver 17 and then received by the underwater sound pressure meter 13.
Sent to Therefore, by monitoring the sound on the observation boat 16, it is possible to know that the measurement at that depth has been completed. Then, the winch 14 is operated to suspend the main body 18 at the next measurement depth. When a series of measurements is completed by the same algorithm as described above, the pinger 20 issues a pinger sound emission command for terminating all measurements. Therefore, the pinger 20 emits a pinger sound in response to the input of this command. This pinger sound is received by the receiver 17 and then sent to the underwater sound pressure gauge 13, so that the pinger sound is monitored and confirmed by the observation boat 16 and the main body 18 is recovered. And this body 1
When the retrieval of 8 is completed, the data analysis device 12 and the controller 19 in the main body are connected on the observation boat 16 by the communication cable 22. Then, the data logger 26 is used according to the communication method.
The measurement data recorded therein is transmitted to the data analyzer 12. Therefore, the data analyzer 12 can analyze the measurement data by the data analysis program, and can analyze and process necessary sensitivity calibration data.

At this time, when the measurement data is analyzed by the data analyzer 12, a comparison calibration method or a mutual calibration method may be used.

The transmission sensitivity of the test transmitter 4B can be measured in the same manner.

FIG. 3 is a block diagram showing another embodiment of the apparatus for measuring the sensitivity of a deep transducer according to the present invention. In the figure, reference numeral 35 denotes a standard transmitter 4A (or test transmitter 4B), test receiver 7A (or standard receiver 7B), and a depth control function added to the controller 19 in the main unit shown in FIG. The measurement / controller 36 composed of the main body 18 is controlled by the depth management function of the measurement / controller 35, and is allowed to descend and rise from the water surface to the measurement depth by itself.
An underwater position holding machine 37 for ascending is a diving / measuring device in which a measurement / controller 35 and an underwater position holding device 36 are accommodated in a container made of a buoyancy material for maintaining neutral buoyancy against seawater or lake water. .

Next, the operation of the deep-depth transducer sensitivity measuring apparatus having the above configuration will be described with reference to FIG. First, when measuring the reception sensitivity of the test receiver 7A, one end of the communication cable 22 is connected to the data analysis device 1 on the observation ship 16.
2 and the other end of the communication cable 22 is connected to the underwater connector 23 for communication, so that the data analyzer 12 and the measurement / controller 35 are connected via the communication cable 22. The data analyzer 12 transmits measurement parameters such as a transmitter / receiver number using a sensitivity calibration method, the number of measurement depth layers, and a measurement frequency point to the measurement / controller 35 via the communication cable 22 prior to the measurement. .
Therefore, the measurement / controller 25 receives and decodes the measurement parameters, and stores the measurement mode, the number of measurement depth layers, the measurement frequency points, and the like. And on the observation ship 16,
The communication cable 22 is detached from the underwater communication connector 23 of the controller 19 in the main body of the measurement / controller 35. Then, the diving / measuring device 37 is put in the water 5.

On the other hand, the controller 25 of the controller 19 in the main body sends the standard transmitter 4 to the switch 31 via the process input / output unit 27.
A and the test receiver 7A are connected. Then, the measurement / controller 35 uses the underwater position holding device 36 by its depth management function.
When the descent command is issued, the underwater position holding device 36 operates and the diving / measuring device 37 gradually increases the depth, and the depth is always detected by the pressure detector 32. When the dive / measurement device 37 reaches the set measurement depth, a self-holding command is sent from the depth management function of the measurement / controller 35 to the underwater position holding device 36, and the dive / measurement device 37 sets the set depth. Hold. Therefore, the controller 25 sets the process input / output unit 2
7. A measurement start command is issued to the frequency characteristic analyzer 28 via 7 in accordance with the set parameters. When the measurement in accordance with the parameter settings is completed, the frequency characteristic analyzer 28 issues an end command to the controller 25.
For this reason, the controller 25 transmits the analysis result to the data logger 2.
Record sequentially in 6. When the recording of the data logger 26 is completed, a descent command is issued to the underwater position holding device 36 by the depth management function of the measurement / controller 35, and the dive / measurement device 37 moves to the next set measurement depth. I do. Then, a series of measurement operations is repeated by the same algorithm as described above. Then, when the measurement of the number of measurement depth layers given by the setting of the measurement parameters is repeated, when the ascent command is issued to the underwater position holding device 36, the dive / measuring device 3
7 rises to the surface of the water and can be accommodated in the observation boat 16. Then, on the observation ship 16, the data analysis device 12 and the measurement / controller 35 are connected by the communication cable 22, and the measurement data recorded in the data logger 26 is transmitted to the data analysis device 12 by the communication method described above. To be transmitted. For this reason, the data analysis device 12 can analyze the measurement data by the data analysis program, and can analyze and process necessary sensitivity calibration data.

At this time, when the measurement data is analyzed by the data analyzer 12, a known comparison calibration method or a mutual calibration method may be used.

Further, it goes without saying that the transmission sensitivity of the test transmitter 4B can be similarly set.

As described above in detail, according to the deep-depth transmitter / receiver sensitivity measuring apparatus according to the present invention, (A) In the cable type, the power supply is built in the main body, and
Supply power to the receiver and receiver
Data from the wave recorder is stored in the built-in data logger
After the main body has been recovered,
The data can be transmitted to the above data analyzer.
A suspension cable is provided between the ship and the main body without a communication cable.
Measurement data for calibration of the sensitivity of the transducer at a large depth can be obtained. In addition, in the untethered type, Yes
In addition to storing data in the data logger,
Instead of the suspension cable,
The dive / measurement device descends to the set depth or water level.
Ascending, the communication between the main body and the observation ship
Observation of the main body without providing a hanging cable as well as a communication cable
Just throwing it into the sea from a ship will allow you to obtain measurement data for calibrating the sensitivity of the transducer at a large depth.

(B) As for the length of the communication cable of the transducer, the connection distance with the main body is short, so that the influence of the communication cable on the sensitivity can be greatly reduced.

(C) There is an effect that the sensitivity characteristic can be measured for each of a plurality of depth layers by one measurement operation.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a deep-depth transducer sensitivity measuring apparatus according to the present invention.

FIG. 2 is a detailed block diagram of a controller in the main body built in the main body shown in FIG.

FIG. 3 is a configuration diagram showing another embodiment of the deep-depth transducer sensitivity measuring apparatus according to the present invention.

FIG. 4 is a configuration diagram showing a conventional transducer sensitivity measuring apparatus.

[Explanation of symbols]

 12 Data Analysis Device 13 Underwater Sound Pressure Gauge 15 Hanging Cable 18 Main Body 20 Pinger 26 Data Logger 35 Measurement / Controller 36 Underwater Position Holder 37 Diving / Measuring Device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichi Uematsu 537-5, Kojima, Ura-Mitsu, Numazu City, Shizuoka Prefecture (72) Inventor Yozo Matsuda 1-7-12 Toranomon, Minato-ku, Tokyo Offshore Inside Electric Industry Co., Ltd. (72) Inventor Akiyoshi Kawamori 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (56) References JP-A-60-80400 (JP, A) JP-A Showa 61-96483 (JP, A) Actually open Showa 49-108455 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04R 29/00 330 G01H 3/00 G01N 29/04

Claims (2)

(57) [Claims] 1. A transmitter / receiver sensitivity measuring device for measuring the sensitivity of a test transmitter or a test receiver which is an acoustic sensor, comprising: means for sending a measurement parameter necessary for sensitivity measurement to an observation vessel; Equipped with a data analyzer that analyzes the measurement results sent to it, and an underwater sound pressure gauge that is suspended underwater and has a receiver that receives the pinger sound. The main body receives and analyzes the measurement parameters sent from the data analyzer prior to the measurement, stores data necessary for sensitivity measurement, receives a detection signal output from the pressure detector, and receives a necessary command signal. In the main body, which outputs a signal, a pinger which outputs a pinger sound to notify the observation ship of the start and end of measurement, etc., a standard transmitter or a test transmitter supported at a predetermined interval, and a test receiver. Or standard receiver And a vessel, hoisting of the hanging down search, feeding by, deep transducer sensitivity measuring apparatus characterized by sensitivity measured suspended in depth that sets the body. 2. A transmitter / receiver sensitivity measuring apparatus for measuring the sensitivity of a test transmitter or a test receiver as an acoustic sensor, comprising: means for transmitting a measurement parameter necessary for sensitivity measurement to the observation vessel; Equipped with a data analysis device that analyzes the measurement results received, a dive / measurement device that descends and ascends by itself receives and analyzes the measurement parameters sent from the data analysis device prior to measurement, and performs sensitivity measurement Equipped with a controller in the main body that stores necessary data for the sensor and outputs the necessary command signal in response to a detection signal output from the pressure detector, a depth management unit, and an underwater position holder that can lower and ascend by itself. A sensitivity measuring device for a deep transducer, wherein the diving / measuring device is moved to a set depth to perform sensitivity measurement.