SU1439406A1 - Device for measuring the height of ground waves - Google Patents

Abstract

The invention relates to ocean; graphical measurements, designed to determine the amplitude of the wave depending on its length and allows you to expand the functionality of the device. The signals from waveguides 7 of the phase velocity meter 4 through analog-to-digital converters 9 are fed to the inputs of the block 8 for calculating the delay time. The generated delay time arrives at the adder 5. From the waveguides 2 of the antenna array, signals are sent through analog-digital converters 9 to the 3-delay lines. The adder 5 reads the signals from each delay line in accordance with the delay time for the given line. As a result of the subsequent summation at the output of the adder, as a result of the signal phase signaling, an information signal is amplified n times, which is then fed to the recorder 6. 1 Il.

Description

1 7

.

The invention relates to oceanographic measurements, in particular for determining the amplitude (or energy) of a wave as a function of its length.

The purpose of the invention is the expansion of the functional capabilities of the device.

The drawing shows a structural diagram of a device for measuring the height of surface waves for the case when the number of waveguides in a one-dimensional antenna array is six (the arrow shows the direction of wave propagation),

The device contains a one-dimensional antenna array 1 consisting of wave-scanners, six adjustable delay lines 3, a phase velocity meter 4, an adder 5 and a recorder 6.

Each waveguide 2 is made in the form of a semi-covered high resistance ohm string connected to an - converter for changing the resistance of the string into an electrical signal. Waveguides 2 are mounted along a straight line in the direction of wave propagation at an equal distance from one another. The distance between the wave scanners is chosen taking into account the assumed range of the investigated wavelengths, setting a certain delay time between the adjacent wave scanners. For example, for the ocean, the characteristic wavelength A is 100 m, which corresponds to a period T 10 s. If you choose the delay time & t between two adjacent waveguides, is close to 0.5 s, then the distance 1 between them is determined from the relation

f / 1 ilAti I (4t / T)

1 5 m.

As a delay line 3, you can use a magnetic storage device (tape recorder. The outputs of adjustable delay lines are connected to the input of adder 5 via an inter4) interface, the matching magnetic storage device with a mini-computer of adder (not shown),

The phase velocity meter A is implemented in the form of AByif waveguides 7 and a blocking device 8 for calculating the time of an impedance (for example, Electronics-BOS computer). Wavegraphs 7 are similar to waveguides 2 and are located along a straight line, in the direction of which the one-dimensional antenna array 1 is oriented. For

0 5 0

g

with

0

docking waveguides 7 with a block of 8 (as well as wavegraphs 2 and delay lines 3) can be used standard analog-to-digital converters (ADC) 9, for example, type F4880 or F7077 / 2 and interface cards (not shown). The output of the delay time calculation unit 8 is the output of the meter 4 and is connected to the input of the adder 5. Electronics-60 can be used as the adder 5. It is possible to combine the functions of blocks 5 and 8 on one. microcomputer. The input of the adder 5 is connected to the input of the recorder 6.

Using the example of one measurement session, the device works as follows.

At the beginning of the measurement session, the phase velocity meter 4 determines the phase velocity Cf by waveguides 7 set at a predetermined distance from one another. The phase velocity Sf is calculated by the microcomputer 8 by the maximum shift of the mutual correlation function 4g and is equal to Sf S / 4r, where S is the distance between the wavegraphs 7,

The microcomputer then determines the delay time ut for each waveguide 2.

Information about the delay time / It goes to adder 5, which combines the signals from each 3 delay lines with the corresponding delay time for this line.

As a result, the signals of all waveguides turn out to be in-phase, and after the adder 5, the recorder 6 receives a signal amplified n times.

The wavelength is calculated according to the formula A SfT, where T is the period of the main energy-carrying waves. For a narrow-band process, such as surface waves, the period T is easily determined by the correlation function or by the frequency of the maximum of the spectrum T D 0 the frequency of the maximum.

If the characteristics of the field under study change, for example, the wavelength and, accordingly, its phase velocity, the device takes into account this automatically measuring the new phase velocity and adjusting the delay time accordingly.

3 1439А06

Claims (1)

The invention of the number of waveguides of the antenna array, in series with the input device for measuring the height of the recorder by the calculating unit surface waves, containing per-time delays and an adder, an output waveguide in the form of high-ohm dusts of the first and second wave-scanners are honest and a recorder, I distinguish-a-cut the corresponding analog-digital right now with the purpose of extension transducers connected to the inputs functionalities, time delay calculation block, it is equipped with a second waveguide, en-IQ, and the waveguide outputs are an antenna lattice array as a wolf group through corresponding analogographs, analog-to-digital converter-digital converters and controllers for the number of wavegraphs, the delay lines are connected to adjustable delay lines by turning the adder.