KR0159081B1 - Method of measuring roll numerical calculation using clinometer - Google Patents

Abstract

The present invention is a roll using an inclinometer for detecting and measuring the degree of distortion of the sound opposing system by using the inclinometer built in the acoustic countermeasure system (ACM) that detects the sound of the seabed to detect the position of the sound source, or detect the traveling speed, etc. (Roll) value measuring method, the first process of measuring the capacitor value from 0 ° to 360 ° for each terminal of the inclinometer with a measuring instrument, and the capacitor value measured in the first process at each one at any point A second step of arranging the order of the capacitor values of the terminals; a third step of finding an angle at which the capacitor values of the respective terminals are maximized by the order determined in the second step; and a capacitor of each terminal in the third step. If the maximum angle is found, the fourth step of finding the same angle of the capacitor value of the two terminals, and when the fourth step is completed, the capacitor value of the highest value and the lowest value of the capacitor value is discarded. Is a fifth process, a sixth process of comparing the values of the remaining four capacitors except the two values discarded in the fifth process, and setting a measurement period; By providing a method consisting of the seventh process to calculate the initial installation position is changed by the external storm, waves, birds, etc., the acoustic countermeasure system can be effectively used in the establishment of defense tactics or attack tactics.

Description

Roll value measurement method using inclinometer

1 is an exemplary configuration block diagram showing an acoustic counter system.

2 is a block diagram showing in detail the vibration isolation module and the sound module of FIG.

3 is a detailed block diagram showing a roll value measurement unit generated in the inclinometer.

4 is a flowchart illustrating a method of measuring roll value generated in an inclinometer.

* Explanation of symbols for main parts of the drawings

10: inclinometer 20: multiplexer

30: signal generator 40: microcomputer

50: D / A converter 60: current drive

70: roll value measuring unit 100: ship

110: data processing unit 120: signal processing unit

200: towing cable 300: sound sensor

310: vibration isolation module 311: tension sensor

312: buffer 320: signal transmission module

330: sound module 331: hydrophone

332: preamplifier 333: protection circuit

334 seawater noise compensation circuit 335, 335a: roll sensor

336: test controller 337: depth sensor

338: direction sensor 340: tail rope assembly

The present invention relates to an acoustic counter measure (ACM) that detects the sound of the seabed and detects the position of a sound source or detects a moving speed, and more particularly, by using an inclinometer built in the acoustic counter system. It relates to a roll value measuring method using an inclinometer for detecting and measuring the degree of distortion of the ACM.

In general, the method of detecting underwater sound by the acoustic countermeasure system that detects the acoustic signal in the water and detects the exact position of the sound source is fixed to the vessel that installs the acoustic sensor unit on the vessel, and the fixed to the seabed that installs the acoustic sensor on the sea floor. There is a towing doll that is connected to the ship by a towing cable.

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 processor 120 A sound sensor unit 300 to transmit, a towing cable 200 connecting the vessel and the acoustic sensor unit 300, and the electrical signal received from the acoustic sensor unit 300, the data processing unit 110 in the ship 100 And a signal processor 120 for classifying, searching, and processing the signal data received from the signal processor 120.

In addition, the acoustic sensor unit 300 includes a vibration isolation module 310 for attenuating initial vibration, a signal transmission module 320 for converting an input analog signal into a digital signal, and transmitting an acoustic signal. A sound module 330, and the tail rope assembly 340 to attenuate the vibration finally.

Hereinafter, the operation of the acoustic sensor unit 300 will be described in detail with reference to FIG. 2.

Acoustic module (330) is a module that receives sea sound signals and converts them into electrical signals while converting them into electrical signals. 331, a preamplifier (Pre-Amp: 332) for amplifying the fine signal, a protection circuit (Input Protector: 333) for protecting the preamplifier 332 from overcurrent, and the inclination of the acoustic sensor unit 330 A roll sensor (335,336) for detecting, a sea noise correction circuit (334) for compensating for noise due to seawater, and a depth sensor (337) for measuring the depth of the acoustic sensor unit 330; It consists of an orientation sensor 338 for measuring the orientation of the acoustic sensor unit 330.

The hydrophone 331 and the preamplifier 332 have three groups at 120 ° intervals in one package, and 32 groups are connected to one channel because 32 such packages are arranged.

Underwater acoustics are propagated by the mechanical coarse action of seawater particles, and the vibration causes a volume change in the hydrophone 331 with a magnitude proportional to the product of the square of the frequency and amplitude, thereby causing the hydrophone 331 to transmit an electrical energy signal. Occurs.

The electrical energy signal is expressed in the form of current and voltage. When impedance matching is performed considering the sensitivity of the hydrophone 331 with the output stage preamplifier 332, the signal of the hydrophone 331 can be transmitted far.

The preamplifier 332 amplifies the weak signal of the output terminal of the hydrophone 331, and processes the small signal of the hydrophone 331 after an amphisus process for attenuation compensation according to the progress of the sound wave. To easily amplify.

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.

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.

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, which results in a weak signal-to-noise ratio for the high frequency signal.

Pre-emphasis and de-emphasis methods to overcome these weaknesses have high signal level and noise can be suppressed to some extent in the transmitter. Intentionally changing, 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.

When the signal is amplified in 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 removal of the noise factor itself as well as the surrounding noise. It is decreasing.

The amplification element itself includes noise generated by the amplifying element, 1 / f noise, shot noise, and Johnson noise, which occur in the low pass filter frequency band, and 1 / f noise occurs in the low pass band, and Johnson noise, Shot noise is called white noise because it appears above the frequency modulation band and is uniformly distributed in the frequency band.

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.

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.

An object of the present invention is to provide a measuring method for detecting and measuring the degree of distortion of an acoustic opposing system (ACM) using an inclinometer built in the acoustic opposing system.

This will be described with reference to the accompanying drawings.

In the acoustic sensor unit 30,

Signal generation of the inclinometer 10 by the inclinometer 10 for changing the capacitor according to the output values of the roll sensors 335 and 335a for detecting the distortion of the acoustic sensor unit 300, and the control signal of the microcomputer 40. A multiplexer 20 selectively connected to the unit 30, a signal generator 30 for generating a pulse having a different frequency according to the capacitor change of the inclinometer 10, and an output from the signal generator 30 A microcomputer 40 for calculating a roll value using the signal as basic data, a D / A converter 50 for converting a digital signal of the microcomputer 40 into an analog signal, and a current drive for converting a voltage value into a current form ( 60) constitutes a roll value measuring unit 70.

The roll value measuring circuit using the inclinometer configured as described above,

A first step of measuring a capacitor value at 0 ° to 360 ° for each terminal (eg, yellow, red, blue, light green, magenta, white) of the inclinometer 10; A second process of arranging the capacitor values of the capacitors at each terminal at any one point; and the angle at which the capacitor values of the terminals are maximized by the order determined in the second process (eg, 0 °, 60 A third step of finding degrees, 120 °, 180 °, 240 °, and 300 °, and an angle (eg, 0 °, 60 °, 120 °, 180 °, 240 °, 300 °), the fourth step of finding the same angle (eg 30 °, 90 °, 150 °, 210 °, 270 °, 330 °) of the capacitor values of the two terminals, and the fourth step is completed. If the 5th step of discarding the capacitor value of the highest value and the lowest value of the capacitor value, and compares the remaining four capacitor values except the two values discarded in the fifth process measurement interval And a sixth process of setting a and a seventh process of calculating a measurement angle according to a calculation formula when the measurement section is set in the sixth process.

Hereinafter, with reference to the accompanying drawings will be described the operation and effect according to the present invention.

The acoustic sensor unit 300 of the acoustic countermeasure system (ACM) installed on the sea floor for underwater sound wave detection may deviate from the initial installed position when the sea surface is inclined by wind, waves, or tidal current. Occurs.

In order to prevent the acoustic countermeasure system from capturing accurate information due to the above reasons, the roll sensors 335 and 335a of the acoustic module 330 of the acoustic sensor unit 300 shown in FIG. 2 are used. It is necessary to recalibrate the changed position by detecting the distortion of the acoustic sensor unit 300.

The present invention is a method of measuring the roll value in the microcomputer 40 in the roll value measuring unit 70 receives the signal output from the roll sensor (335, 335a) to perform the signal processing to achieve the above functions 3 to It demonstrates mainly by 4 degrees.

The roll sensors 335 and 335a of the inclinometer 10 are a combination of capacitors including a dielectric.

When the acoustic module 330 is inclined by an external force, dielectrics inside the inclinometer 10 input different capacitors to the multiplexer 20.

The multiplexer 20 selects a capacitor by a control signal output from the microcomputer 40, and the selected signal is input to the signal generator 30 through an output terminal.

The signal generator 30 generates a signal for measuring a roll value by the input signal and inputs the signal to the microcomputer 40.

The microcomputer 40 estimates an angle by comparing and analyzing the input signal with a plurality of frequency values when a signal for measuring a roll value is input by the signal generator 30.

The process is as follows.

A capacitor value is measured at 0 ° to 360 ° for each terminal (eg, yellow, red, blue, light green, magenta, white) of the inclinometer 10 of the roll value measuring unit 80 shown in FIG. Measure in graph form.

The capacitor values measured in the graph form are arranged in order of the capacitor values of each terminal at any one point.

At this time, the microcomputer 40 discharges according to the capacitor value of each terminal to count pulses to determine the order of the capacitor values.

When the order of the capacitor values is arranged, the microcomputer 40 determines the angle (eg, 0 °, 60 °, 120 °, 180 °, 240 °, 300 °) at which the capacitor value of each terminal becomes the maximum according to the predetermined order. Find the same angle of the two-terminal capacitor value (eg 30 °, 90 °, 150 °, 210 °, 270 °, 330 °).

When the same angle with respect to the capacitor value of the two terminals is found, the microcomputer 40 discards the capacitor value of the highest value and the capacitor value of the lowest value and discards the remaining four values (for example, 0 ° and 300 °). Example: Set the measurement interval by comparing the capacitor values of 60 °, 120 °, 180 °, and 240 °).

When the measurement section is set, the microcomputer 40 calculates the measurement angle according to the calculation formula when the measurement section is set, and transmits it in parallel to the D / A converter 50 at the rear end as a 12-bit digital signal.

The D / A converter 50 converts a parallel digital value composed of 12 bits into an analog value within a predetermined range (for example, -5V to + 5V) and receives the voltage in a voltage form for high-speed transmission through the current drive 60. The converted signal is converted into a signal in the current form.

The signals of the roll sensors 335 and 335a which have undergone the above process are converted into a rolling value in the range of 0 ° to 360 ° to be matched with the range of -5V to + 5V, and then converted into a signal of -5mA to + 5mA. The final output from the drive 60.

As described above, the present invention uses an inclinometer built into the acoustic countermeasure system to detect and measure the degree of distortion of the acoustic countermeasure system (ACM). By detecting changes in the initial installation position due to waves, tides, etc., the acoustic countermeasure system has an effect of contributing to the effective use of defense tactics or attack tactics.

Claims (1)

In the roll value measuring method using an inclinometer, the first process of measuring the capacitor value from 0 ° to 360 ° with respect to each terminal of the inclinometer with a measuring instrument, and the capacitor value measured in the first process at any one point at each terminal A second step of arranging the order of the capacitor values of and a third step of finding an angle at which the capacitor value of each terminal is maximized by the order determined in the second step; In the fourth process of finding the same angle of the capacitor value of the two terminals when the angle is to be found, and the fifth process of discarding the capacitor value of the highest value and the lowest value of the capacitor value when the fourth process is completed, and in the fifth process A sixth step of setting a measurement section by comparing the remaining four capacitor values except the discarded two values; and calculating the measurement angle according to a calculation formula when the measurement section is set in the sixth step. Method measures the seventh process value roll (Roll) using a tilt sensor comprising a.