SU1492358A1 - Device for selection of pulses - Google Patents

Abstract

The invention relates to automation and computing and can be used in geophysical surveys of wells to accurately link incoming information to depth. The purpose of the invention is to increase the reliability of the device. The device contains elements AND 1-8, elements OR 9-14, amplifiers 14 and 15, divider 16 frequencies, triggers 17 and 18, counter 19, decoders 20 and 21, shaper 22 codes. When a short pulse from the depth sensor disappears, a correction impulse is formed in the device, which eliminates the accumulation of an error in determining the depth of the well. 1 hp f-ly, 3 ill.

Description

3149

The invention relates to automation and computing, and can be used in well surveys for accurate visibility of the depth of incoming information.

The purpose of the invention is to increase the reliability of the device.

Fig. I shows a diagram of the proposed device; figure 2 - timing diagrams; on fig.Z - schema shaper codes

The device contains the first 1, second 2, third 3, fourth A, fifth 5, sixth 6, seventh 7 and eighth 9 elements AND, first 9, second 10 third 11, fourth 12 and fifth 13 elements OR, first 14 and second 15 amplifiers, frequency divider 16, first 17 and second 18 triggers, counter 19, first 20 and second 21 decoders, shaper 22 codes.

The shaper 22 codes (FIG. 3) consists of memory blocks 23 and 24, keys 25 and 26, and block 27 of elements OR

The device works as follows.

The signals coming into the device from the depth sensor, which is a magnetic head near which a steel cable passes with previously applied magnetic markings on it through a well-defined distance (for example, 10 m).

When processing data, it is necessary to filter pulses caused by magnetic marks from interference pulses. For this purpose, an angular ascent rate sensor is used, the frequency of which signals are proportional to the ascent rate (Fig. 2g). The pulses from this sensor are fed to the first amplifier. After the formation of pulses in the last and frequency division by a frequency divider 16, they have the form shown in Fig. 26. In the initial position, the first trigger 17 is in the single state and the resolving level from its output is given to the first input of the seventh element AND 7.

The first pulse arriving at the device input through the second amplifier 15, the second input of the seventh element And 7, the first input of the fifth element OR 13, is fed to the reset input of the counter 19 and through the third input of the first element OR 9 to the reset inputs

first 17 and second 18 triggers. As a result of this, the subsequent pulses from the second amplifier I5 do not pass through the seventh element I 7, since at its first input there is no enabling signal from the output of the first trigger 17. The pulses from the output of the frequency divider 16 (Fig. 2b) are fed to the first the inputs of the first 1 and second 2 elements And, and depending on whether the first or second input of the device for moving the object is supplied with the resolving potential, go to the first (subtracting) or to the second (summing) input of the counter 19, filled with reversible and having a volume, equal to N. After the occurrence of the first pulse at the input of the device, the counter I9 is set to the zero state. Consider the operation of the device in the mode of summing pulses from an angular velocity sensor, i.e. an allowance potential is fed to the second input of the object displacement direction device. The second trigger 18 is in the zero state and there is no permit level at its output. When the counter 19 reaches the state equal to n, the second decoder 21 generates a pulse arriving at the first inputs of the fifth 5 and sixth 6 I / O elements. However, this pulse at the output of the latter does not pass due to the absence of a resolving potential at the first input of the displacement direction device object and the output of the second trigger 18. When the state of the counter 19 is equal to Nn, the first decoder 20 produces a pulse fig.2d, arriving at the first inputs of the third 3 and fourth 4 elements I. However, it passes to the output of the third element And 3, since at its second input there is a resolving potential from the second input of the device for moving the object. The pulse from the output of the third element And 3 through the first input of the second element OR 10 is fed to the installation input of the second trigger 18. The latter switches and supplies the enabling level to the first input of the eighth element And 8. After that, the first incoming pulse to the device input through the second amplifier 15 passes to the output of the eighth element AND 8 and further through the first input of the third element OR 11 on

the device output, (At the same time, the pulse from the output of the eighth element and B sets the counter 19 to the zero state. The pulse from the device output through the fourth input of the first element OR 9 sets the second trigger 18 to the zero state, thereby terminating the sixth 6 and eighth 8 elements And prohibit the passage of pulses from the input device to its output.

Claims (1)

If the main pulse for a moment disappears, for example, one or two (FIG. 2a), during operation of the counter 19, there will be no N-n state to n pulses at the device input. The pulse from the output of the second decoder 21, when the counter 19 is equal to n, through the open sixth element 6, goes to the second input of the third element OR 11, and then to the output of the device. This will be an artificially generated impulse, instead of the missing main impulse. In digital processing systems, its presence is necessary, otherwise the error in determining the depths of information from the well accumulates. Considering that it comes at the end of the time resolution window, the counter 19 is not set to O, but to the state with a gating pulse coming through the fourth element OR 12 from the output of the sixth element AND 6, the code corresponding to the state n is obtained on the shaper 22 codes, from the positive level at its first input. The operation of the proposed device in the subtraction mode is similar to that described and differs in that it allows the level. filed at the first input of the object guiding device. Invention Formula one A device for selecting pulses comprising a first amplifier connected in series, the input of which is the device synchronization input, and a frequency divider whose output is connected to the first inputs of the first and second And elements, the second inputs of which are the first and second boosts of the object moving direction device the first element And is connected to the subtracting input of the counter, the output of the second element And is connected to the summing input9. at 10 15 20 4923586 the counter house, the counter output is connected to the inputs of the first and second decoders, the output of the first decoder is connected to the first inputs of the third and fourth elements AND, the output of the second decoder to the first inputs of the fifth and sixth elements AND, the second inputs of the fourth and fifth elements AND with the first input of the object moving direction device, the second inputs of the third and sixth And elements - with the second input of the object moving direction device, the outputs of the third and fifth And elements - with the inputs of the second OR element, the output of which It is connected to the setup input of the second trigger, the output of the fourth element I is connected to the first inputs of the first and third elements OR, the output of the third element OR is the output of the device, the second input of the first element OR is connected to the output of the device, the output of the first 25 elements OR to the inputs Reset -. 1st and second triggers, output of the second trigger - with the first input of the eighth element And with the third inputs of the fourth and sixth elements And, output of the first trigger - with the first input of the seventh element And, the output of the second amplifier - with the second inputs the seventh and eighth elements AND, the input of the second amplifier is the information input of the device, the output of the eighth element AND is connected to the second input of the third OR element, the output of the sixth AND element - with the third inputs of the first and third OR elements, the output of the seventh AND element - from the fourth m input of the first element OR, characterized in that, in order to increase the reliability of the device, it contains the fourth and fifth OR elements and a code generator, the output of which is connected to the installation input of the counter, and the first and second inputs to the first and second inputs of the direction device displacement of the object, the first and second inputs of the fourth element OR - with the outputs of the fourth and sixth elements AND, and - with the input gate of the counter 30 35 40 45 50 ka, the first and second inputs of the fifth element OR are connected to the outputs of the seventh and eighth elements AND, and the output to the Reset counter input. 2, The device according to claim 1, 1, and 1 st, which is that the shaper of the code contains two memory blocks, two keys and a block of OR elements, whose inputs are connected to the outputs of the first and second keys, and the output is 14923588 The key inputs of the keys are connected to the outputs of the memory blocks, the control inputs of the keys are the first and the second inputs are formed by the output of the driver, the informant. G W P p m I I I I I I 1 IlllllllllllllillllllH Figg fig.Z I I I I