KR0126899Y1 - Gain amplification circuit signal transmission module of acoustic counter measure - Google Patents
Gain amplification circuit signal transmission module of acoustic counter measure Download PDFInfo
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- KR0126899Y1 KR0126899Y1 KR2019950036906U KR19950036906U KR0126899Y1 KR 0126899 Y1 KR0126899 Y1 KR 0126899Y1 KR 2019950036906 U KR2019950036906 U KR 2019950036906U KR 19950036906 U KR19950036906 U KR 19950036906U KR 0126899 Y1 KR0126899 Y1 KR 0126899Y1
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- 230000003321 amplification Effects 0.000 title claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 17
- 230000008054 signal transmission Effects 0.000 title claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000013535 sea water Substances 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/14—Systems for determining distance or velocity not using reflection or reradiation using ultrasonic, sonic, or infrasonic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B45/00—Arrangements or adaptations of signalling or lighting devices
- B63B45/08—Arrangements or adaptations of signalling or lighting devices the devices being acoustic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
- B63C11/48—Means for searching for underwater objects
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
본 고안은 수중의 음향 신호를 감지하여 음향원의 정확한 위치 등을 탐지하는 음향 대항 체계(Acoustic Couner Measure)에 있어서 음향모듈(Acoustic Module)에서 수신된 신호를 함상의 신호수신부로 전송하는 신호전송모듈(Telemetry Data Measure)의 아날로드 멀티플렉서부내의 전류/전압 변환된 신호를 아날로그 다중화하는 아날로그 멀티플렉서의 출력을 증폭하는 이득증폭회로로서, 디지털 멀티플렉서/드라이버부의 제어신호를 이용하여 신호가 미약한 32채널(CH1 - CH32)의 음향센서 신호는 적당한 크기로 증폭하고, 4채널(CH33 - CH36)의 보조센서 신호는 증폭하지 않고 출력하는 신호전송모듈의 이득증폭회로이다.The present invention is a signal transmission module for transmitting a signal received from the acoustic module (acoustic module) to the ship signal receiver in the acoustic Couner Measure to detect the acoustic signal in the water to detect the exact position of the sound source, etc. A gain amplifier circuit that amplifies the output of an analog multiplexer that analog-multiplexes the current / voltage-converted signal in the analog multiplexer section of (Telemetry Data Measure), and uses a control signal of the digital multiplexer / driver section. It is a gain amplification circuit of the signal transmission module that amplifies the acoustic sensor signal of CH1-CH32 to an appropriate size and outputs without amplifying the auxiliary sensor signal of 4 channels (CH33-CH36).
Description
제1도는 음향 대항 체계를 보인 일 예시 구성 블럭도.1 is an exemplary configuration block diagram showing an acoustic counter system.
제2도는 제1도의 진동격리모듈 및 음향모듈을 세부적으로 보인 구성 블럭도.2 is a block diagram showing in detail the vibration isolation module and the sound module of FIG.
제3도는 제1도의 신호전송모듈의 구성 블럭도.3 is a block diagram of the signal transmission module of FIG.
제4도는 본 고안을 포함하는 아날로그 멀티플렉서부를 세부적으로 보인 구성 블럭도.4 is a block diagram showing in detail the analog multiplexer unit including the present invention.
제5도는 본 고안 이득증폭회로의 회로도.5 is a circuit diagram of a gain amplifier circuit of the present invention.
제6도는 본 고안 이득증폭회로 제어신호의 타이밍 예시도.6 is a timing diagram of a gain amplifier circuit control signal of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 음향센서 신호 입력부 20 : 음향센서 신호 증폭부10: sound sensor signal input unit 20: sound sensor signal amplification unit
30 : 보조센서 신호 입력부 40 : 신호가산부30: auxiliary sensor signal input unit 40: signal adding unit
100 : 함상 110 : 자료처리부100: ship 110: data processing unit
120 : 신호수신부 200 : 예인케이블120: signal receiver 200: towing cable
300 : 음향센서부 310 : 진동격리모듈300: sound sensor unit 310: vibration isolation module
311 : 텐션센서 312 : 버퍼311: tension sensor 312: buffer
320 : 신호전송모듈320: signal transmission module
321A, 321B, 321C : 아날로그 멀티플레서부321A, 321B, 321C: Analog Multiplexer Section
322A, 322B, 322C : 디지철 멀티플레서/드라이버부322A, 322B, 322C: Digital Iron Multiplexer / Driver Section
330 : 음향모듈 331 : 수중청음기330: sound module 331: hydrophone
332 : 전치증폭기 333 : 보호회로332: preamplifier 333: protection circuit
334 : 해수잡음보상회로 335, 336 : 롤센서334 seawater noise compensation circuit 335, 336: roll sensor
337 : 수심센서 338 : 방위센서337: depth sensor 338: orientation sensor
340 : 꼬리로프조립체340: tail rope assembly
본 고안은 수중음향을 감지하여 음향원의 정확한 위치 등을 탐지하는 음향 대항 체계(Acoustic Counter Measure)의 음향모듈(Acoustic Module)에서 전송한 신호들을 샘플링하여 아날로그/디지털 변환하고 변환된 신호를 다중화하여 신호의 왜곡없이 원거리 송신하는 신호전송모듈(Telemetry Data Module)내의 이득증폭회로에 관한 것으로서, 특히 아날로그 멀티플렉서의 출력을 선택적으로 증폭하는 이득증폭회로에 관한 것이다.The present invention samples the signals transmitted from the acoustic module of the acoustic counter measure, which detects the underwater sound and detects the exact position of the sound source. The present invention relates to a gain amplifier circuit in a telemetry data module for remote transmission without distortion of a signal, and more particularly to a gain amplifier circuit for selectively amplifying the output of an analog multiplexer.
일반적으로 수중의 음향 신호를 감지하여 음향원의 정확한 위치 등을 탐지하는 음향 대항 체계가 수중음파를 감지하는 방식은 선박에 음향 센서부를 설치하는 선박 고정향과 해저지면에 음향 센서를 설치하는 해저 고정형 및 선박에 예인케이블로 연결하는 예인형이 있다.In general, the acoustic countermeasure system that detects the acoustic signal in the water and detects the exact location of the sound source detects the sonar waves. And a towing type connected to the vessel by a towing cable.
상기 예인형 음향 대항 체계(Towed Acoustic Counter Module)는 제1도에 도시한 바와 같이 수중의 음향 신호를 감지하여 전기적인 아날로그 신호로 변환하고 이를 다시 디지털 신호로 변환하여 다중화하여 신호수신부(120)로 전송하는 음향센서부(300)와, 선박과 수중의 음향센서부(300)를 연결하는 예인케이블(200)과, 음향 센서부(300)로부터 수신한 전기신호를 함상(100)에 있는 자료처리부(110)에 전달하는 신호수신부(120)와 신호수신부(120)로부터 수신된 신호 데이터를 분류, 검색, 처리하는 자료처리부(110)로 구성된다.The towed acoustic counter module (Towed Acoustic Counter Module) detects the acoustic signal in the water as shown in FIG. 1 and converts it into an electrical analog signal and converts it back into a digital signal and multiplexed to the signal receiver 120 A towing cable 200 for connecting the acoustic sensor unit 300 to be transmitted, the acoustic sensor unit 300 in the ship and the underwater, and the electrical signal received from the acoustic sensor unit 300 data processing unit in the vessel 100 The signal receiver 120 and the data processor 110 for classifying, searching, and processing the signal data received from the signal receiver 120 are provided.
상기 음향센서부(300)는 초기 진동을 감쇄시키는 진동격리모듈(Vibration Isolation Module, 310)과, 입력되는 아날로그 신호를 디지털 신호로 변화하여 전송하는 신호전송모듈(320)과, 음향신호를 감지하는 음향모듈(330)과, 최종적으로 진동을 감쇄시키는 꼬리로프조립체(340)로 구성되어 있다.The acoustic sensor unit 300 includes a vibration isolation module 310 for attenuating initial vibration, a signal transmission module 320 for converting and transmitting an input analog signal into a digital signal, and detecting an acoustic signal. The sound module 330, and the tail rope assembly 340 to finally dampen the vibration.
이하 상기 음향센서부(300), 신호수신부(120) 및 자료처리부(110)의 동작을 제2도를 이용하여 설명하면 다음과 같다.Hereinafter, operations of the acoustic sensor unit 300, the signal receiver 120, and the data processor 110 will be described with reference to FIG. 2.
음향모듈(Acoustic Module : 330)은 수중의 음향신호를 수신하여 전기적신호로 변환시키면서 신호를 타고 흐르는 해수 잡음을 제거하는 기능을 하는 모듈로 수중의 음향 신호를 수신하여 전기 신호로 변환하는 수중청음기(Hydrophone : 331)와, 미세신호를 증폭하는 전치증폭기(Pre-Amp : 332)와, 수중청음기(331)를 과전류로부터 보호하는 보호회로(Input Protector : 333)와, 음향센서부(330)의 기울어짐을 감지하는 롤센서(Poll Sensor : 335,336)와, 해수로 인한 잡음을 보상하는 해수잡음 보상회로(Sea Noise Correction Amp : 334)와, 음향센서부(330)의 수심을 측정하는 수심센서(337)와, 음향센서부(330)의 방위를 측정하는 방위센서(338)로 구성된다.The acoustic module 330 is a module that receives sea sound signals and converts them into electrical signals, and removes seawater noise flowing through the signals. Hydrophone: 331, a preamplifier (Pre-Amp: 332) for amplifying a fine signal, a protection circuit (Input Protector: 333) to protect the hydrophone 331 from overcurrent, and the tilt of the acoustic sensor unit 330 Roll sensor for detecting baggage (Poll Sensor 335,336), Sea Noise Correction Amp (334) for compensating for noise caused by seawater, and depth sensor (337) for measuring the depth of the acoustic sensor unit 330 And an orientation sensor 338 for measuring the orientation of the acoustic sensor unit 330.
상기 수중청음기(331)와 전치증폭기(332)는 하나의 패키지(Package)내에 120。 간격으로 3개의 그룹이 있고, 이러한 패키지가 32개 배열되므로 각각의 그룹은 32채널을 갖는다.The hydrophone 331 and the preamplifier 332 have three groups in one package at intervals of 120 DEG. Each of the groups has 32 channels because 32 such packages are arranged.
수중음향은 해수 입자의 기계적 소밀 작용에 의해 전파되며, 이 진동이 주파수의 제곱과 진폭과의 곱에 정비례하는 크기로 수중청음기(331)에 체적변화를 일으키고 이로써 수중청음기(331)는 전기적 에너지 신호를 발생한다.Underwater acoustics are propagated by the mechanical coarsening of seawater particles, and the vibration causes a volume change in the hydrophone 331 in a magnitude proportional to the product of the square of the frequency and amplitude, thereby causing the hydrophone 331 to receive an electrical energy signal. Occurs.
상기의 전기적 에너지 신호는 전류와 전압의 형태로 표현되는데 수중청음기(331)의 출력단 전치증폭기(332)와의 감도를 고려하여 임피던스 결합시키면 수중청음기(331)의 신호를 멀리 전송할 수 있다.The electrical energy signal is expressed in the form of current and voltage. Impedance coupling considering the sensitivity with the output preamplifier 332 of the hydrophone 331 may transmit the signal of the hydrophone 331 farther.
상기 전치증폭기(332)는 수중청음기(331) 출력단의 미약한 신호를 증폭하고, 음파의 수중진해에 따른 감쇄 보상을 위해 엠퍼시스(Emphasis) 처리후 수중청음기(331)의 작은 신호를 신호처리하기에 용이하게 증폭한다.The preamplifier 332 amplifies the weak signal at the output of the hydrophone 331, and processes the small signal of the hydrophone 331 after an emphasis process to compensate for the attenuation caused by the underwater vibration of the sound wave. To easily amplify.
상기 엠퍼시스란 고주파 확산을 발생하도록 신호를 변경하는 프리 엠퍼시스(Pre-emphasis)와 저주파 성분을 고주파에 비해 확장시키는 디 엠퍼시스(De-emphasis)를 통칭하는 것으로 엠퍼시스 처리를 함으로써 수신단의 신호대잡음비(Signal To Noise Ratio : SNR)가 증가하게 된다.The emphasis refers to a pre-emphasis that changes a signal to generate a high frequency spread and a de-emphasis that extends a low frequency component as compared to a high frequency. Signal To Noise Ratio (SNR) is increased.
좀 더 상세히 설명하면 음파와 같이 대부분의 에너지가 저주파 영역에 존재하는 신호는 같은 크기의 고주파 성분으로 인하여 커다란 주파수편이(Frequency Deviation)를 발생시키지 않는다.In more detail, a signal in which most energy exists in a low frequency region such as sound waves does not cause a large frequency deviation due to a high frequency component of the same magnitude.
그러므로, 신호의 에너지가 할당된 대역폭에 균일하게 분포하는 것이 아니라 고주파 부분의 에너지는 적게 분포한 결과 고주파 신호에 대해서는 아주 낮은 신호대잡음비를 나타내는 약점을 가진다.Therefore, the energy of the signal is not uniformly distributed over the allocated bandwidth, but the energy of the high frequency portion is less distributed, resulting in a very low signal-to-noise ratio for the high frequency signal.
이러한 약점을 개선하기 위한 프리엠퍼시스(Pre-emphasis)와 디 엠퍼시스(De-emphasis)방식은 송신기에서는 신호레벨이 높고, 잡음이 어느정도 억제될 수 있어 변조할 신호는 저주파에 비하여 고주파를 확장시켜 의도적으로 변경하고, 수신기에서는 신호레벨이 높고, 잡음이 어느 정도 억제될 수 있어 복조할 신호를 고주파에 비하여 저주파를 확장시켜 의도적으로 변경하는 것을 말한다.Pre-emphasis and de-emphasis methods to solve this weak point have high signal level in the transmitter and noise can be suppressed to some extent. It is intentionally changed, and the signal level is high in the receiver and noise can be suppressed to some extent so that the signal to be demodulated is intentionally changed by extending the low frequency compared to the high frequency.
상기 전치증폭기(332)에서 신호가 증폭될 때 잡음도 신호에 실겨 같이 증폭되므로, 주변잡음뿐만 아니라 증폭소자 자체 잡음 요인의 제거도 고려하여 전치증폭기(332)의 증폭회로 대역폭을 제한함으로써 잡음 레벨을 감소시키고 있다.When the signal is amplified by the preamplifier 332, the noise is also amplified together in the signal, thereby limiting the amplification circuit bandwidth of the preamplifier 332 in consideration of the elimination of the noise factor of the amplifying element itself as well as the ambient noise. It is decreasing.
상기 증폭소자 자체 잡음 요인에는 증폭소자에서 발생하는 잡음을 저역통과 여파기 주파수 대역에서 발생하는 1/f 잡음, Shot 잡음, 그리고, Johnson 잡음들이 있으며, 1/f 잡음은 저역통과 대역에서 발생하며, Johnson 잡음, Shot 잡음은 에프엠(Frequency Modulation)대역 이상에서 나타나고 주파수대역에 균일하게 분포하는 특성이 있으므로 백색잡음이라 한다.The amplification element itself includes noise generated in the amplification element, 1 / f noise, shot noise, and Johnson noise generated in the low pass filter frequency band, and 1 / f noise occurs in the low pass band. Noise and shot noise are called white noise because they appear above the frequency modulation band and are uniformly distributed in the frequency band.
상기와 같이 처리된 신호는 해수잡음보상회로(334)를 통과하면서 저주파영역에 존재하는 해수내의 잡음신호는 차단되고, 감쇄된 고주파 성분신호는 보상되어 신호전송모듈(320)에 전달된다.As the signal processed as described above passes through the sea noise compensation circuit 334, the noise signal in the sea water existing in the low frequency region is blocked, and the attenuated high frequency component signal is compensated and transmitted to the signal transmission module 320.
또한 음향모듈(330)의 수심센서(337)와 방위센서(338)는 음향센서부(300)의 예인 방위와 수심 정보를 각각 측정하여 상기 신호전송모듈(320)에 전달한다.In addition, the depth sensor 337 and the azimuth sensor 338 of the acoustic module 330 measure azimuth and depth information, which are examples of the acoustic sensor unit 300, and transmit the measured azimuth and depth information to the signal transmission module 320.
신호전송모듈(320)에 전달된 신호는 아날로그/디지털 변환되어 신호전송에 필요한 처리를 한 다음 예인함 및 예인케이블에서 발생되는 진동의 감쇄와 예인으로 인한 진동 발생을 텐션센서(Tension Sensor : 311)에서 감지하여 버퍼(Buffer : 312)에서 감지된 진동을 완충하는 진동격리모듈(310)을 거쳐 예인케이블(200)을 경유하여 선박의 함상(100)에 설치된 신호수신부(120)에 전송된다.The signal transmitted to the signal transmission module 320 is analog / digital converted to process necessary for signal transmission, and then the towing and attenuation of vibration generated from the towing cable and the generation of vibration due to the towing tension sensor (Tension Sensor: 311) It is transmitted to the signal receiving unit 120 installed in the vessel 100 of the ship via the towing cable 200 via the vibration isolation module 310 to detect the buffer (Buffer: 312) to buffer the vibration detected by.
신호수신부(120)는 수신한 신호들을 처리하여 자료처리부(110)에 전송하며, 자료처리부(110)는 수신된 신호 데이터를 분류, 검색 등의 처리를 하게 된다.The signal receiver 120 processes the received signals and transmits the received signals to the data processor 110, and the data processor 110 processes the received signal data such as classification and search.
상기 신호전송모듈(320)의 구성 및 작용을 제3도 및 제4도를 참조하여 좀 더 상세히 설명하면 다음과 같다.The configuration and operation of the signal transmission module 320 will be described in more detail with reference to FIGS. 3 and 4 as follows.
상기 신호전송모듈(320)은 3그룹 A, B, C로 나뉘어지며 각 그룹은 아날로그 컬티플렉서부(321A, 321B, 321C)와 디지털 멀티플렉서/드라이버부(322A, 322B, 322C)로 구성된다.The signal transmission module 320 is divided into three groups A, B, and C, and each group is composed of an analog culplexer unit 321A, 321B, and 321C and a digital multiplexer / driver unit 322A, 322B, and 322C.
신호전송모듈(320)의 각 그룹 A, B, C 에 음향모듈(330)에서 전류형태로 전송된 32개의 음향센서 신호 및 4개의 보조센서 신호가 입력되면 전류형태의 신호는 전류/전압 변환수단(I/V CONV)에서 전압형태로 변환되고 아날로그 멀티플렉서(AMUX)는 디지털 멀티플렉서/드라이버부(322A, 322B, 322C)가 발생하는 제어신호를 이용하여 상기 변환된 신호를 일정한 주파수(예 : 15.36㎑) 간격으로 샘플링 및 다중화하여 디지털 멀티플렉서/드라이버부(322A, 322B, 322C)에 출력하면, 상기 디지털 멀티플렉서/드라이버부(322A, 322B, 322C)는 수신한 신호를 디지털 신호로 변환하여 디지털 다중화하고 신호전송에 필요한 처리를 하여 동축케이블을 통해 신호를 전송한다.When 32 sound sensor signals and 4 auxiliary sensor signals transmitted from the sound module 330 in the current form are input to each group A, B, and C of the signal transmission module 320, the current form signal is current / voltage converting means. (I / V CONV) is converted into a voltage form and the analog multiplexer (AMUX) uses the control signal generated by the digital multiplexer / driver units 322A, 322B, and 322C to convert the converted signal into a constant frequency (for example, 15.36 ㎑). Sampling and multiplexing at intervals) and outputting them to the digital multiplexer / driver unit 322A, 322B, and 322C, the digital multiplexer / driver unit 322A, 322B, and 322C converts the received signal into a digital signal and digitally multiplexes the signal. It performs the processing necessary for transmission and transmits the signal through coaxial cable.
그러나, 상기 아날로그 멀티플렉서(AMUX)에서 출력되는 음향센서 신호는 미약하므로 신호를 증폭하여 디지털 멀티플렉서/드라이버부(322A, 322B, 322C)에 출력할 필요가 있다.However, since the acoustic sensor signal output from the analog multiplexer (AMUX) is weak, it is necessary to amplify the signal and output it to the digital multiplexer / drivers 322A, 322B, and 322C.
본 고안은 상기와 같은 필요에 의해 안출된 것으로, 아날로그 멀티플렉서(AMUX)에서 출력되는 음향센서 신호와 보조센서 신호를 선택적으로 일정한 이득으로 증폭하는 이득증폭수단(Gain Amp)의 이득증폭회로를 제공하는데 그 목적이 있다.The present invention has been made by the above-described needs, and provides a gain amplification circuit of a gain amplifier means (Gain Amp) for selectively amplifying the acoustic sensor signal and the auxiliary sensor signal output from the analog multiplexer (AMUX) with a constant gain. The purpose is.
본 고안은 제5도에서 보듯이 음향센서 신호의 입력을 제어하는 스위치(SW1)와 전압폴로어(Voltage Followr)로 버퍼(Buffer) 역활을 하는 차동증폭기(OP1)와 보호용 저항(R1)으로 이루어진 음향센서 신호 입력부(10), 음향센서 신호를 증촉하는 차동증폭기(OP2)와 음향센서 신호의 증폭율을 결정하는 저항(R2, R3)와 증폭된 음향센서 신호가 신호가산부(40)에 입력되는 것을 제어하는 스위치(SW2)로 이루어진 음향센서 신호 증폭부(20)와, 보조센서 신호의 입력 버퍼 역활을 하는 차동증폭기(OP3)와 보조센서 신호가 신호가산부(40)에 입력되는 것을 제어하는 스위치(SW3)와 보호용 저항(R4)으로 이루어진 보조센서 신호 입력부(30), 음향센서 신호와 보조센서 신호를 다중화하여 출력하는 신호가산부(20)로 구성된다.The present invention is composed of a switch (SW1) for controlling the input of the acoustic sensor signal, a differential amplifier (OP1) acting as a buffer (Voltage Follower) and a protective resistor (R1) as shown in FIG. The acoustic sensor signal input unit 10, the differential amplifier OP2 for encouraging the acoustic sensor signal, the resistors R2 and R3 for determining the amplification ratio of the acoustic sensor signal, and the amplified acoustic sensor signal are input to the signal adder 40. Acoustic sensor signal amplification unit 20 comprising a switch (SW2) for controlling the control, differential amplifier (OP3) and the auxiliary sensor signal that serves as an input buffer of the auxiliary sensor signal is controlled to be input to the signal adder (40) Auxiliary sensor signal input unit 30 consisting of a switch (SW3) and the protection resistor (R4) is composed of a signal adder 20 for multiplexing and outputting the acoustic sensor signal and the auxiliary sensor signal.
본 고안의 작용 및 효과를 제5도 및 제6도를 참조하여 설명하면, 다음과 같다.The operation and effects of the present invention are described with reference to FIGS. 5 and 6 as follows.
32채널의 음향센서 신호(CH1 - CH32)는 제어신호 GR5 하이(High)이고, 제어신호 GR4가 로우(Low)인 정해진 시간동안(예 : 56.30631㎲)에만 증폭부(10)에서 R3/R2배(예 : 20dB) 증폭되어 신호가산부(20)를 통해 출력된다.The 32-channel acoustic sensor signals (CH1 to CH32) are the control signal GR5 high and R3 / R2 times in the amplification section 10 only for a predetermined time (eg 56.30631 kHz) when the control signal GR4 is low. (Example: 20dB) is amplified and output through the signal adder 20.
즉, 디지털 멀티플렉서/드라이버부(322A, 322B, 322C)에서 발생하는 스위치 제어신호가 GR5가 하이(High)이고, GR4 로우(Low)이면 스취치(SW1, SW3)은 오프(Off)되고, 스위치(SW2)는 온(On)되어 차동증폭기(OP1)에 입력되는 음향센서 신호는 음향센서 신호 증폭부(20)에서 저항(R2, R3) 값에 따라 증폭되어 신호가산부(40)에 입력되고, 보조센서 신호는 신호가산부(40)에 입력되지 않으므로 결과적으로 32채녈의 음향센서 신호만 증폭되어 출력되는 것이다.That is, when the switch control signal generated by the digital multiplexer / driver unit 322A, 322B, and 322C is GR5 high, and GR4 low, the speech SW1 and SW3 are turned off, and the switch The SW2 is turned on and the acoustic sensor signal input to the differential amplifier OP1 is amplified by the acoustic sensor signal amplifier 20 according to the resistors R2 and R3 to be input to the signal adder 40. Since the auxiliary sensor signal is not input to the signal adder 40, only the 32-channel acoustic sensor signal is amplified and output.
또한 4채널의 보조센서 신호(CH33 - CH36)는 제어신호GR5가 로우이고, 제어신호 GR4가 하이인 정해진 시간동안(예 : 7.03829㎲)에만 증폭없이 신호가산부(20)를 통해 출력된다.In addition, the four-channel auxiliary sensor signals CH33 to CH36 are output through the signal adder 20 without amplification only for a predetermined time (eg, 7.03829 kHz) when the control signal GR5 is low and the control signal GR4 is high.
즉, 디지털 멀티플렉서/드라이버부(322A, 322B, 322C)에서 발생하는 스위치 제어신호가 GR5가 로우이고, GR4가 하이이면, 스위치(SW1, SW3)은 온되고, 스위치(SW2)는 오프되어 음향센서 신호는 그라운드(Ground)되고, 신호가산부(20)에 입력되는 음향센서 신호는 없으며, 차동증폭기(op3)에 입력된 보조센서 신호가 증폭없이 신호가산부(20)를 통해 출력되는 것이다.That is, when the switch control signal generated by the digital multiplexer / driver unit 322A, 322B, 322C is GR5 is low and GR4 is high, the switches SW1, SW3 are turned on, and the switch SW2 is turned off so that the acoustic sensor The signal is grounded, there is no acoustic sensor signal input to the signal adder 20, and the auxiliary sensor signal input to the differential amplifier op3 is output through the signal adder 20 without amplification.
상기와 같은 본 고안은 아날로그 멀티플렉서에서 출력되는 음향센서 신호와 보조센서 신호 중에서 음향센서 신호만을 선택적으로 증폭하여, 디지털 멀티플렉서/드라이버부의 아날로그/디지털 변화기에 출력함으로써 아날로그/디지털 변화기가 아날로그 신호를 디지털 신호로 변화하기 위해 샘플링하여 양자화 할 때 신호가 미미한 경우에 발생하는 오치를 줄여주는 효과가 있다.The present invention as described above selectively amplifies only the acoustic sensor signal among the acoustic sensor signal and the auxiliary sensor signal output from the analog multiplexer, and outputs the analog signal to the digital signal by the analog / digital converter to the analog / digital converter of the digital multiplexer / driver section. When sampling and quantizing to change to, it reduces the error that occurs when the signal is insignificant.
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