KR20020081501A - Separator transmitting and receiving of sonor - Google Patents

Abstract

PURPOSE: A send/receive separation apparatus is provided to separate, in a stable manner, send/receive modes, while lengthening useful life of the device by preventing excessive electrical stresses at the receiver circuit input terminal. CONSTITUTION: A send/receive separation apparatus(100) comprises a first switching unit for outputting a driving signal by the transmission synchronous signal input from an external source; a second switching unit which is initialized in a receive mode and converted into a send mode when the driving signal is input from the first switching unit; a power amplifier(120) for amplifying the transmission synchronous signal input from an external source; a first transformer(130) for converting the transmission synchronous signal output from the power amplifier, into a voltage required for the system; a transducer(140) for transducing the voltage output from the first transformer into a sonic wave and sending the sonic wave when the second switching unit is converted into a second mode, and receiving the sonic wave and converting the received sonic wave into an electrical signal when the second switching mode is in a receive mode upon absence of the transmission synchronous signal; a second transformer(150) for converting the electrical signal output from the transducer, into a voltage required for the system, and outputting the voltage; and a receiver circuit(160) for processing the voltage output from the second transformer.

Description

Sonar's Transmit / Receive Separator {SEPARATOR TRANSMITTING AND RECEIVING OF SONOR}

The present invention relates to an apparatus for transmitting / receiving, and more particularly, a sonar that performs a stable transmission / reception function by resolving excessive transmission of electrical power to a receiving circuit and transmitting excessive electrical stress at a receiving circuit input terminal. It is about the transmission / reception device of).

On land and in the air, electromagnetic waves are used to detect targets by radar, laser, or infrared, but sonar (SONAR) is used to detect targets in the water. The sonar is the ship's essential acoustic equipment, allowing the ship to navigate safely and find threatening underwater objects. Sonar's working principle uses piezoelectric phenomena. When the intensity of the current flowing through crystals or ceramics representing piezoelectric phenomena is changed to a constant frequency, they oscillate and generate sound waves of the same frequency. On the contrary, when the sound wave is received from the outside, electric energy is generated, so analyzing the electric signal can find out the components of the sound wave. Sona is a device that can transmit and receive sound waves.

In general, as shown in FIG. 1, the conventional sonar transmit / receive separator 10 includes a power amplifier 11, a first transformer 12, diodes D1 to D6, and capacitors C1 and C2. ), A transducer 13, a second transformer 14, and a receiver circuit 15.

The power amplifier 11 amplifies the transmission synchronization signal T input from the outside. The first transformer 12 increases the transmission voltage output from the power amplifier 11 to a voltage equal to N times necessary for the system and outputs the voltage. The diodes D1 to D6 and the capacitors C1 and C2 are all conducted under the influence of the voltage output from the first transformer 12. The transducer 13 converts the electrical transmission signal flowing through the diodes D1 to D4 into sound waves and converts the transmitted or received sound waves into electrical signals. The second transformer 14 converts the electrical signal converted by the transducer 13 into a voltage necessary for the receiving circuit 15 and supplies the converted signal to the receiving circuit 15. The receiving circuit 15 processes the electrical signal supplied from the second transformer 14.

Referring to the operation of the conventional sonar transmission / reception separation apparatus 10, first, when a pulse transmission signal synchronous signal T is input from the outside, the power amplifier 11 increases the transmission synchronous signal T, That is, the transmission synchronization signal T is amplified at the rising edge. Then, on the secondary side of the first transformer 12, the transmission voltage output from the power amplifier 11 is increased to a voltage of N times necessary for the system and is outputted. As a result, the diodes D1 to D6 and the capacitor C1.C2 are output. ) Is conducted. The transmission voltage is applied to the transducer 13 through the diodes D1 to D4, and when the voltage is applied to the diodes D5 and D6 through the conductive capacitors C1 and C2, the receiving circuit 15 is cut off and transmitted. The voltage does not flow into the receiving circuit 15. Then, the electrical transmission voltage applied to the transducer 13 is converted into sound waves and transmitted. In addition, when a sound wave is received from the outside of the transducer 13, the transducer 13 converts the sound wave into an electrical signal, and the diodes D1 to D6 are all cut off, and the received signal is merely a capacitor C1, It is applied to the second transformer 14 through C2). Then, the second transformer 14 converts the applied electrical signal into a voltage required for the receiving circuit 15, and the receiving circuit 15 processes the signal by using the converted voltage as an input.

However, the conventional sonar transmit / receive separation device 10 has a voltage drop as much as the diodes D1 to D4 during transmission, and the capacitors C1 and C2 act as load effects at both ends of the transducer 13. Therefore, there is a problem that a sufficient transmission signal is not supplied to the transducer 13.

In addition, since the voltage is applied to the diodes D5 and D6, the receiving circuit 15 is not completely separated, which may cause a malfunction. There is another problem losing.

Accordingly, an object of the present invention is to solve the above problems, by using a relay that physically separates the transmission mode and the reception mode to block the transmission of the transmission signal to the receiving circuit to perform a stable transmission / reception separation function In addition, it is possible to prevent excessive electrical stress from occurring at the input of the receiving circuit, thereby extending the life of the device.

1 is a circuit diagram showing the configuration of a conventional sonar transmission and reception separation device

2 is a circuit diagram showing the configuration of a sonar transmission and reception separation apparatus according to the present invention

<Explanation of symbols for main parts of the drawings>

110: relay 120: power amplifier

130: first transformer 140: transducer

150: second transformer 160: receiving circuit

Q: transistors a and c: first and second transmission contacts

b, d: 1st, 2nd contact e, f: 1st, 2nd common contact

Features of the present invention for achieving the above object,

First switching means for switching in accordance with a transmission synchronization signal input from the outside and outputting a driving signal;

Second switching means for switching to a transmission mode when a drive signal is input from the first switching means in a state of initializing in a reception mode;

A power amplifier for amplifying the transmission synchronization signal input from the outside;

A first transformer for converting the transmission synchronization signal output from the power amplifier into a voltage required for a system and outputting the voltage;

When the second switching means is switched to the transmission mode, the voltage output from the first transformer is converted into sound waves and transmitted, and when the second switching means is initialized to the reception mode because there is no input of the transmission drive signal, sound waves are generated. A transducer that receives and converts it into an electrical signal,

A second transformer converting the electrical signal converted by the transducer into a voltage required by the system and outputting the converted voltage;

And a reception circuit for processing a reception signal which is a voltage output from the second transformer.

Here, the first switching means,

A base is connected through a bias resistor connected to an input terminal of the transmission synchronization signal, an emitter is grounded to ground, and a NPN transistor connected to a collector through a bias resistor connected to an input terminal of a constant voltage terminal.

Here also the second switching means,

A first transmitting contact point and a second transmitting contact point are connected to a secondary side of the first transformer, a first receiving contact point and a second receiving contact point are connected to a first side of the second transformer, and first and second ends of the transducers are connected to each other. The relay is connected to the common contact point and the second common contact point.

Hereinafter, the structure of the sonar transmission / reception apparatus according to the present invention will be described in detail with reference to FIG.

2 is a circuit diagram showing the configuration of a sonar transmission / reception separation apparatus according to the present invention.

Referring to FIG. 2, the sonar transmission / reception apparatus 100 according to the present invention includes a transistor Q, a relay 110, a power amplifier 120, a first transformer 130, and a transducer. 140, a second transformer 150, and a receiving circuit 160.

The base of the transistor Q is connected via a bias resistor R1 connected to the input terminal of the transmission synchronization signal T, the emitter is grounded, and the collector is connected to the input terminal of the constant voltage terminal Vcc. Is connected through.

The relay 110 includes a control terminal Vcc to which the collector of the transistor Q is connected, a first transmission contact a, a second transmission contact c, a first reception contact b, and a second reception contact ( d) and a first common contact point (e) and a second common contact point (f).

The power amplifier 120 is connected to the input terminal of the transmission synchronization signal.

The first transformer 130 has a primary side connected to an output terminal of the power amplifier 120, and a secondary side connected to a first transmission contact a and a second transmission contact c of the relay 110.

The transducer 140 is connected to the first common contact e and the second common contact f of the relay 110.

The second transformer 150 has a primary side connected to the first receiving contact b and the second receiving contact d of the relay 110.

The receiving circuit 160 is connected to the secondary side of the second transformer 150.

Hereinafter, the operation of the sonar transmission / reception separation apparatus 100 according to the present invention will be described in detail with reference to FIG. 2.

First, if there is no input of the transmission synchronization signal (T), the transducer 140 receives the sound wave and converts it into an electrical signal. The converted electrical signal is applied to the second transformer 150 through the first common contact e and the first receiving contact b, the second common contact f, and the second receiving contact d to receive the receiving circuit. Is converted to the voltage necessary for 160. Thereafter, the receiving circuit 160 processes a signal using a voltage applied from the second transformer 150.

However, when the transmission synchronization signal T is input from the outside, the transistor Q is turned on and outputs a driving signal. As a result, the relay 110 is driven so that the first transmission contact in the initialization state is connected to the first reception contact b and the first common contact e, the second reception contact d, and the second common contact f. a) and the first common contact (e), the second transmission contact (c) and the second common contact (f) is switched. That is, the switching contact of the relay 110 is switched from the reception mode to the transmission mode.

At the same time, the transmission synchronization signal (T) is amplified by the power amplifier 120, the amplified transmission synchronization signal (T) is raised to a voltage N times necessary for the system in the first transformer (130). The increased transmission voltage is applied to the transducer 140 through the first transmission contact a and the first common contact e, the second transmission contact c, and the second common contact f. Transducer 140 then converts the applied transmission voltage into sound waves and transmits the sound.

As described above, according to the sonar transmission / reception separation apparatus according to the present invention, by using a relay that physically separates a transmission mode and a reception mode, a transmission / reception separation function is prevented by preventing a transmission signal from flowing into a reception circuit. In addition, the life of the device can be extended by preventing excessive electrical stress from occurring at the input of the receiving circuit.

Claims (3)

First switching means for switching in accordance with a transmission synchronization signal input from the outside and outputting a driving signal; Second switching means for switching to a transmission mode when a drive signal is input from the first switching means in a state of initializing in a reception mode; A power amplifier for amplifying the transmission synchronization signal input from the outside; A first transformer for converting the transmission synchronization signal output from the power amplifier into a voltage required for a system and outputting the voltage; When the second switching means is switched to the transmission mode, the voltage output from the first transformer is converted into sound waves and transmitted, and when the second switching means is initialized to the reception mode because there is no input of the transmission drive signal, sound waves are generated. A transducer that receives and converts it into an electrical signal, A second transformer converting the electrical signal converted by the transducer into a voltage required by the system and outputting the converted voltage; And a receiving circuit for processing a receiving signal which is a voltage output from the second transformer. The method of claim 1, The first switching means, A sonar transmit / receive, characterized in that the base is connected via a bias resistor connected to the input of the transmission synchronization signal, the emitter is grounded to ground, and the collector is connected via a bias resistor connected to the input terminal of the constant voltage terminal. Separator. The method of claim 1, The second switching means, A first transmitting contact point and a second transmitting contact point are connected to a secondary side of the first transformer, a first receiving contact point and a second receiving contact point are connected to a first side of the second transformer, and first and second ends of the transducers are connected to each other. Sonar transmission and reception separation apparatus, characterized in that the relay is connected to the common contact and the second common contact.