SU546088A1 - Sync device - Google Patents

Description

(54) SYNCHRONIZING DEVICE

The invention relates to the field of radio engineering and instrument engineering and can be applied in hydroacoustics, for example, in a two-channel hydroacoustic instrument.

A synchronization device is known, which serves to simultaneously observe two electric signals on a single-beam electron oscilloscope screen.

This device consists of a generator of positive pulses for starting a generator of positive trigger pulses, a differentiating pulse, a diode detector, an attenuator, an oscilloscope, and a delay line 1.

The disadvantages of such a synchronization device are the possibility of oscillography only of periodically varying such and voltage from one object of study and the lack of operation of the device in the equisignal zone, since in the known scheme there is one way of passing electrical signals from the object of study.

The purpose of the invention is the simultaneous observation of I1pulse signals from two receiving-transmitting channels operating with a shift in time.

The goal is achieved in that a synchronization device containing a series-connected main driver pulse generator, a differentiating circuit, a negative polarity diode detector, a main output pulse generator and an attenuator, as well as a series-connected main receiving and amplifying channel and a delay line, the output of which is connected to an oscilloscope, and a positive polarity diode detector connected to the output of the differentiating circuit, an amplifier, a summator, two logic elements em, as well as additional receiving and amplifying channel, output pulse generator and attenuator, the outputs of the additional and main receiving and amplifying channels through the banning logic elements connected to the inputs of the adder, the output of which is connected to the oscilloscope vertical detector input, the outputs of the detectors positive and negative polarities are connected to the inputs of the main and additional output PMNT generators and to the inputs of the amplifier, the output of which is connected to the input through a delay line m external synchronization of the oscilloscope, while the other inputs of logic elements “prohibition connected to the inputs of the primary and secondary output pulse generators, the outputs of which through the primary and secondary attenuators are respectively connected to the inputs of the adder.

The drawing shows a structural electrical circuit of a synchronization device.

The device consists of a master oscillator 1, an output oscillator 2, a differentiating chain 3, diode detectors 4 and 5, an attenuator 6, a delay line 7, a receiving-amplifying channel 8, an oscilloscope 9, an amplifier 10, an adder P, an attenuator 12, an output generator 13 , sriemno-amplifier channel 14, the elements of the "ban 15 and 16.

The output of the master oscillator 1 is connected to a differentiating chain 3, the output of which through diode detectors 4, 5 is connected to the output generators 2, 13, the outputs of which through attenuators 6 and 12 are connected to the inputs of the adder 11, the output of which is connected to an oscilloscope 9, to the inputs adder 11 connected outputs of the elements "ban.

The sync device works as follows.

If one iriane-amplified channel is working, the other is locked.

The locking of the channels is carried out with the aid of logic elements "prohibit / 5 and 16 of the first or second channels 8, 14.

The screen of the electronic oscilloscope 9 will display one below the other bursts of reflected waves of two channels at a distance from the "zero marks, proportional to twice the length of the path of the ultrasonic vibrations from the acoustic antennas of the channels S and 14 to the items of interest.

"Zero marks on the oscilloscope screen are obtained from short and sharp probe pulses, due to the fact that the launch of a sweep over an optical oscilloscope-9 and is produced with a delay in the delay line 7.

Reflected from objects located in the equi-bit direction, the signals (in two channels) on the screen of the oscilloscope 9 are displayed in the same place, but in the opposite polarity, as a result of the presence of the amplifier-inverter in the second receiving and amplifying channel.

The image of the signals reflected from objects that are not located in the equisignal direction on the screen of the oscilloscope will not be combined, since the transit time of the reflected signals is different.

With the use of a double-drop X-ray sonar, it is possible to form an equal-signal zone by acoustic antennas of two channels.

In this case, the accuracy of the reference is improved, and the sought-for object is more easily determined against the background of false signals.

When measuring, the oscilloscope sweep is in standby mode.

Due to the inertia of the operator’s view and the afterglow effect of the indicator, the amplitude marks corresponding to the reflected signals of the two channels will be displayed one below the other on the screen of the electronic one-oscilloscope (if the reflected signals in the two channels lie from the target located in the equi-directional direction).

Such an indication allows you to simultaneously see the probing (as mentioned above, Due to the delay of the start of the oscilloscope sweep, only one tenth of the duration of the probe pulses will be visible on its screen) and the reflected signals in each measurement channel and know which channel the probing or reflected signals correspond to in the positive or negative mapping on the time axis of the electron oscilloscope sweep and to conduct the spatial orientation of the loudspeaker antennas on the target located on the equal ignalnom direction.

At the maximum distance from the antenna to the target, equal to D, the interval between after | Honored parcels (following period) is equal to

„, 2D {m)

I (sec) - 7, t-T-.

  C (m / ce / {.)

where C is the speed of propagation of ultrasonic waves in the medium. "/ sec; (usually in the order of 1500 m / s in water).

The pulse frequency of master oscillator F is defined as:

one

fi, (sec)

The duration of the probing pulses is selected from the condition of obtaining the necessary average POWER to overlap the required (maximum) distance with ultrasonic vibrations.

Invention Formula

A synchronization device containing a series-connected master oscillator, a differentiating circuit, a negative polarity diode detector, a main output pulse Vpulse and an attenuator, as well as series soy (the main channel and the delay line whose output is connected to an oscilloscope, and a positive polarity diode detector connected to the output of a differentiating circuit, characterized in that, in order to simultaneously observe pulsed signals from two x iriemno-transmitting channels,

working with a shift in time, it introduced an amplifier, an adder, two “ban” logical elements, as well as additional receiving and amplifying channels, an output pulse generator and an attenuator, with the outputs of the additional and main receiving and amplifying channels through the “ban” logical elements the adder, the output of which is connected to the inputs of the oscillator vertical scanner, the outputs of the detectors of positive and negative polarity are connected to the inputs of the main and additional output pulse generators and with the amplifier inputs, the output of which is connected via a delay line to the external synchronization input of the oscilloscope, while the other inputs of the logic elements “prohibition are connected to the inputs of the main and additional output pulse generators, the outputs of which through the main and additional attenuators are respectively connected to the inputs of the adder .

Sources of information taken into account In the examination of the invention:

1. Redkina L.I. and Redkin B.N. “Electronic commutators to oscillographs, M.,“ Energie, p. 9-11 is a prototype.