SU577492A1 - Device for following arbitrary signal phase in a coustic well-logging - Google Patents

Description

one

The invention can be used in geophysical studies of wells in acoustic logging equipment.

A well-known acoustic logging instrument with a variable duration of ms-gtv time in the amplification path 1 is known.

Its disadvantage is poor noise immunity due to the fact that the yci path of laziness opens for a relatively large epithelial time, protected, on the one hand. With the fall of the r-strobe pulse of an adjustable one-vibration, on the other hand, the maximum possible travel time from the radiator to the receiver. At the same time, even with short-term attenuations of the x {slnal (which occurs during the passage) of the probe cavities and fractured rock sections), the feedback device 311 affects the controlled one-shot, whether the last or for a long time closes the selector amplifier | ceases to overlap dead time. During periods of mediated recovery of the seperate susceptibility, the recorder receives non-cost-effective values about the temporal position 25

first signal entered. In addition, the device does not allow tracking of an arbitrary signal phase,

It is also known a device consisting of a single-vibrator, fadron, a trigger, a null-organ, which has sufficient noise immunity and allows tracking of an arbitrary signal phase by setting the pulse width of a single-delay variable delay 2

However, when copepedimentary disappearance of the waveguides of the signal from the squash probe, a malfunction is possible - installation at a different phase of the usa.

The aim of the invention is to improve the quality of signal processing by eliminating the jump of the gated window when the signal disappears.

This is achieved by the fact that the output of the phanthotron through the one-shot is connected to the input of the setting O of the charge trigger and the AND circuit, the other input of the AND-circuit is connected to the output of the charge trigger, and the triggering input of the charge trigger is connected to the single-discharge discharge.

Due to such an ancient scheme of adjustment, T.e, the effect on charge of the Cfdme scheme begins only after the arrival of the required phase signal.

Fig. 1 shows a structural scheme of a device for monitoring an arbitrary phase; ignal | on, (2 "- time diagrams. 10 sn5poskas work shek {s,

The device consists of three odnovibratO 1,2,3; fantastron 4; trigger Sf aapssj; two contagious schemes 6 7i CXR: s &8; null organ 9; inputs to the device 10,11.12.13.

All elements have known circuit targets,

During operation, the signal input 13 of the circuit 8 is fed through the ground amplifier from the downhole probe, to the input 12 of the single-input delay 1, short pulses are given, corresponding to the torques of the downhole probe, and to the blocking inputs 10, 11 6, 7, a step voltage is applied to the trigger trigger of the ground equipment channels.

The one-vibrator 1 of the delay of the renepiipyer beehive to protect the measuring circuit from the excitation pulse of the emitter (Fig. 2, puree 2), the falling edge of this pulse is fredrn 4, the duration iiivt of which the pulse is proportional to the magnitude of the negative voltage from the output of the charging circuit b and 7 Fig, 2, plot 3). The channeling is done by the channel tracer.

The falling edge of the fadron 4 pulse, one-shot strobe one-shot 2 (FIG. 2, puree 4),

At the permissive inputs of the AND 8 circuit, the voltage is from the trigger 5 of the charge and the pulse of the strobe. If the required phase occurs during the gating, then the signal through the boor And 8 of the zero-organ 9 triggers a single-bit 3-bit (Figure 2, plot 4 ) 3adm 4 ont of the one-shot 3, the charge rigger 5 overturns (Fig. 2, plot 5), and the trigger o returns to a similar state (by the front edge of the strobe pulse. The discharge of the discharge-discharge circuit is charged. ( FIG ,, 2, plot 6),

The state of the device does not change j if the rem charge is equal to the discharge time.

The storage capacity of the charge-discharge circuit is discharged and discharged by the same: am, -.

The waiting window is equal to the time from the beginning; the thrombus pulse of the one-shot 2 to the arrival of the required phase,

Repeat the 1st start of the one-shot 3 by lechs during the time of action of the strobe pulse

ruled out by banning Tpjirrepa after oirokidy sdvshh © Bslaovoy paintings ,. what happens when you change the speed of the acoustic loudspeaker in the generated start of the one-shot 3 pro ISODE earlier than the previous cycle depending on how fast the stack propagates the acoustic head,; the benefit of this change in the duration of the charge trigger and therefore , capr, cie from the output of the charge –discharge circuit, This voltage will affect the duration of the control board so that the

, the system should be in a stable state, i.e., the discharge time and charge time should again

to become equal to co-man this equality will be - get-kuto rfpE another level iap & Neither from the output of the aar day-discharge cell. The adjustment of the system on the grabber of the Yu phase can be carried out by means of ke-direct influence on its / her own power charge charge-discharge circuit diagrams.

When I1 “1 pulse hits a single vibrator, the strobe is triggered by the phantasgron, but no charge is generated at all times,“ Therefore, this & no weight memory changes and the device waits for the signal to arrive at the same time to the previous US-UQI, Thus, the device tracking.

arbitrary phase of the next, eliminating failure, with the disappearance of the signal; Ensures high-quality information processing, excluding the omission of frequent information, 6aaic is a gift to the fact that there is no need for further searches and installation of the required phase,

Fore

Spinning device for an arbitrary phase of the hustar logging signal, consisting of two aar diodes, cxeMj, and a trigger, phaptron, trigger, charge, and the circuit, characterized by 4TOj, in order to increase the quality of the signature processing, the output of the frontron through the single vibrator is connected to the input and the input of the single vibrator is connected to the input The setting is about the charge tracer and the AND circuit, the other input cxoMii is connected to the output of the charge trigger; and the trigger input of the charge charging circuit is connected to the output of the single-discharge discharge generator. Sources of information taken into account during the examination:

1. US Patent No. 3259880, cl. 34O18. 1967.

2.1 USSR author's certificate

No. 477376.

G 01 V 1/40, 1975.

FIG. one