JP3002328B2 - Ultrasonic wave transmitter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic wave transmitting apparatus, and more particularly, to a power transmitting apparatus such as a sonar system for detecting a distance and an azimuth of a target by generating a sound wave in water and utilizing a reflected sound. The present invention relates to an ultrasonic wave transmitting device using a transmitter having a built-in amplifier.

[0002]

2. Description of the Related Art Transducers incorporating a conventional electronic device include a hydrophone T manufactured by Bruel & Kjr.
YPE8101-8105 (Bruel & Kjr
Corporation, instruction manual "Instruct
Tion Manual ”(page 9), but the electronic device in the transmitter / receiver has only a function of amplifying a signal and cannot detect an abnormality in the transmitter.Low weight, low cost, high reliability The purpose is to realize the nature.

[0003]

An ultrasonic wave transmitting apparatus is usually constructed by combining a number of small transducers to control the directivity and beam size of a sound wave beam. In the transmitter / receiver, an abnormality in the transmitter could not be detected, and an overcurrent flowed to damage the power amplifier, the electronic circuit, and the like. It was also found that even if some of the transducers were damaged, the directivity of the sound beam and the control of the beam size were seriously affected, and the reliability was reduced. Furthermore, when several hundreds of transducers are used, they are installed outside the ship, so it is important to reduce the weight and reduce the number of transmission lines connecting the onboard equipment and the transducers.

A first object of the present invention is to realize an ultrasonic wave transmitting apparatus using a highly reliable built-in power amplifier type transmitter / receiver. A second object of the present invention is to provide a high-reliability, low-weight and low-cost power suitable for an ultrasonic transmitting apparatus.
The object is to realize a transducer with a built-in amplifier.

[0005]

In order to achieve the above object, a transmitter having a built-in power amplifier, a first electronic device for supplying power and a driving signal to the transmitter, A line connecting the wave device and the electronic device, and a detection unit (sensor) for detecting an abnormality of the wave transmitter in at least one of the wave transmitter and the electronic device are provided. As a particularly preferred embodiment, a sensor for driving an abnormality of the built-in electronic device is provided in a transmitter having a built-in power amplifier, and an abnormality detection signal of the sensor is transmitted to the first electronic device by the first electronic device. The signal is transmitted using a frequency multiplexing technique via a line that supplies an input signal from the electronic device to the transmitter. In another particularly preferred embodiment, the first electronic device includes:
The transmitter is provided with an abnormality detection circuit and an abnormality analyzer that detect and analyze abnormality of the transmitter from power and a drive signal.

[0006]

The transmitter with built-in power amplifier amplifies an input signal supplied from a power source and drives a piezoelectric element in the transmitter to transmit sound waves into water. An abnormality in the power amplifier is output from the transmitter according to an alarm signal detected by the sensor. At this time, since the input signal and the alarm signal are transmitted to the signal line, only the necessary signal is passed by the band-pass filter and the input signal is supplied to the power amplifier, and the alarm signal is transmitted to the band-pass filter. To detect power amplifier abnormalities. Thus, even if the input signal and the alarm signal are superimposed on the signal line, no malfunction occurs. In the ultrasonic wave transmitting device according to the present invention, the abnormality can be detected for each of the transmitters, so that the reliability of the device is improved. In particular, according to the preferred embodiment, it is not necessary to provide a special signal line between the transmitter and the first electronic device for abnormality detection, so that the cost and weight of the device are reduced. Is realized.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the ultrasonic wave transmitting device according to the present invention. This embodiment is used for detecting and measuring an underwater object. A transmitter 13 with a built-in power amplifier is provided outside a ship, and a power supply line 5 and an input signal line 6 are provided.
And an abnormal signal line 7 for coupling with the electronic device 1 provided in the ship. Input signal 14 generated by signal generator 3
Is transmitted through the input signal line 6 and the band-pass filter A.
The sound wave is transmitted to the underwater by being applied to the amplifier 10 and driving the piezoelectric element 11 after being amplified. The electronic device 8 in the transmitter 13 is operated by the power supply 2 in the ship, and the abnormality detector 1
An abnormality in the electronic device 8 is determined from the alarm signal 15 by the signal 2 and sent to the abnormality analyzer 4 in the ship via the abnormality signal line 7.

FIG. 2 is a block diagram showing the configuration of a second embodiment of the ultrasonic wave transmitting device according to the present invention. The same parts as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the abnormal signal line 7 is connected to the input signal line 6 in the embodiment of FIG.
This is a configuration that can also be used. Therefore, the input signal 14 is coupled to the input signal / alarm signal line 20 at the output of the signal generator 3 of the electronic device 1 provided on the ship, and is transmitted by the input signal / alarm signal line 20. A transformer A16 for separating an incoming signal and adding the separated signal to a band-pass filter B17 is provided. An output of a V / F converter 19 and a converter 19 for frequency-converting an output voltage of the abnormality detector 12 is input to a transmitter 13. The signal and alarm signal line 20 is coupled to the signal line 20.
A transformer B18 is provided for coupling the incoming and outgoing input signal to a bandpass filter A9.

A power supply line 5 and an input signal / alarm signal line 20 are connected between the inboard 1 and the transmitter 13. Signals for operating the transmitter 13 include an input signal 14 and an alarm signal 15 in addition to the power supply, but a transformer A16 and a transformer B
The signal is mixed by 18 so that the signal line 20 is shared. Since the alarm signal 15 is also superimposed on the signal line 20, the signal passes through the band-pass filter B9 corresponding to the signal generator band as shown in FIG. And amplifies only the input signal 14 from the transmitter and transmits sound waves from the transmitter 13 into the water.

The abnormality detector 12 detects an overcurrent of the power amplifier 10, a rise in temperature, and the like, converts the detected voltage into a voltage signal, and converts the voltage into a voltage signal.
Transformer B after voltage / frequency conversion by F converter 19
The signal 18 is mixed with the input signal 14 via the signal line 18 and transmitted to the transformer A16 via a signal line.
Is input to The characteristic of the bandpass filter-A17 is V
Since only the frequency band of the / F converter 19 is passed, the signal of the signal generator 3 is cut off. Abnormality analyzer 4
Analyzes the alarm signal 15 from the V / F converter 19 to determine whether the power amplifier 10 is abnormal. Therefore,
According to this embodiment, the number of signal lines can be reduced by sharing the alarm signal 15 and the input signal 14 with the same signal line.

FIG. 3 is a block diagram showing the configuration of a third embodiment of the ultrasonic wave transmitting apparatus according to the present invention. In the transmitter 13 of the present embodiment, no special means for detecting an abnormality is provided,
Transmitter 1 from power supply 2 and input signal 14 of onboard electronic equipment 1
No. 3 is detected. A current detection circuit 21, an input signal detection circuit 22,
An abnormality detection circuit including a comparison determination circuit 23;
The current detection circuit 21 monitors the current of the power supply 2 to the transmitter 13 and outputs the state to the comparison determination circuit 23. The input signal detection circuit 22 detects the presence or absence of an input signal from the signal generator 3 and outputs the same to the comparison determination circuit 23. The comparison determination circuit 23 determines the relationship between the current and the input signal 14 and outputs an alarm signal 15 if abnormal.

FIG. 4 is a block diagram showing the configuration of a fourth embodiment of the ultrasonic wave transmitting apparatus according to the present invention. Also in this embodiment, the transmitter 13 is not provided with any special means for abnormality detection,
Transmitter 1 from power supply 2 and input signal 14 of onboard electronic equipment 1
No. 3 is detected. In the present embodiment, when an abnormality occurs in the transmitter 13, fluctuation of the power load is prevented.

The detection circuit 25 monitors the current to the transmitter 13 and detects the presence or absence of an input signal to the transmitter 13 and outputs the detected signal to the control circuit 27. The control circuit 27 includes a detection circuit 25
In response to the output from the switch, the switching circuit is operated to disconnect the line to the corresponding transmitter 13, a dummy load 26 equivalent to the transmitter 13 is connected, and the primary side and the secondary side of the power source 2 are connected. Prevent fluctuations in power load.

[0014]

According to the present invention, it is possible to detect an abnormality in a transmitter with a built-in power amplifier.
According to the embodiment of FIG. 4, since the number of signal lines can be reduced, the weight and cost of the cable can be halved and the reliability can be improved. Further, according to the embodiment of FIG. 4, when an abnormality is detected in the transmitter, the abnormal line is cut off and switched to the equivalent dummy load, so that the fluctuation of the power load can be prevented, and the load fluctuation to other transmitters can be prevented. In addition, the influence of the abnormal transmitter on the ultrasonic transmitting system using a large number of transmitters can be prevented, and the reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a circuit according to the present invention.

FIG. 2 is a configuration diagram of another embodiment of the circuit according to the present invention.

FIG. 3 is a configuration diagram of still another embodiment of the circuit according to the present invention.

FIG. 4 is a configuration diagram of still another embodiment of the circuit according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Onboard electronic device 17 ... Bandpass filter-B 2 ... Power supply 18 ... Transformer B 3 ... Signal generator 19 ... V /
F converter 4 ・ ・ ・ Analyzer 20 ・ ・ ・ Input signal line and alarm signal line 5 ・ ・ ・ Power supply line 21 ・ ・ ・ Current detection circuit 6 ・ ・ ・ Input signal line 22 ・ ・ ・ Input signal Detection circuit 7 ... Abnormal signal line 23 ... Comparison circuit 8 ... Electronic equipment 24 ... Changeover switch 9 ... Bandpass filter-A 25 ... Detection circuit 10 ... Power amplifier 26 ... Dummy load 11 ... Piezoelectric element 27 ... Control circuit 12 ... Abnormality detector 13 ... Transmitter with built-in amplifier 14 ... Input signal 15 ... Alarm signal 16 ... Transformer A.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-221815 (JP, A) JP-A-58-45580 (JP, A) JP-A-61-162122 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H04R 1/44 330 G01D 21/00 H03F 3/20

Claims (3)

(57) [Claims] 1. A power amplifier with a built-in power amplifier installed underwater.
And a power supply installed in the ship to supply power to the transmitter
A power supply and a signal generator for generating a drive signal for the transmitter
Electronic equipment, and water connecting the transmitter and the electronic equipment
An ultrasonic transmitting apparatus having a dense cable,
A sensor for detecting an abnormality of the transmitter,
Means for transmitting the output signal of
Anomaly analyzer where the electronic device analyzes the output signal of the above sensor
And transmits the output signal of the sensor to the abnormality analyzer.
The signal generator in the watertight cable
That the line connecting the transmitter and the transmitter is shared
An ultrasonic wave transmitting device characterized by the above-mentioned. 2. A transmitter with a built-in power amplifier which is installed in water, a power source which is provided in a ship and supplies power to the transmitter, and a signal generator which generates a drive signal for the transmitter. In an ultrasonic transmitting apparatus having an electronic device having the same and a watertight cable connecting the transmitter and the electronic device, an abnormality of the transmitter is detected from the power to the electronic device and the driving signal. An ultrasonic wave transmitting device provided with abnormality detecting means. 3. An ultrasonic transmission system comprising a plurality of ultrasonic transmission devices according to claim 1 or 2, wherein only a line of the transmitter in which an abnormality is detected is disconnected and a dummy equivalent to the line is simultaneously cut. An abnormality detection circuit having means for preventing a change in power load by connecting a load.