SU503544A3 - A device for multiplex digital recording of logging measurements - Google Patents

Description

(54) DEVICE FOR MULTIPLEX DIGITAL RECORDING OF RESULTS OF CARTRIDGE MEASUREMENTS

the sensor, by which is meant the device, connected to the rings of the cable lowered into the well and adapted to the physical parameters of the cable and allowing the transmission of signals in both directions.

The drawing shows a block diagram of the described device, which has four inputs: X, Y, Z, U. The inputs X and Y are connected to the channel switch 1, the output of which is connected to the analog-code converter 2, the output of the latter is connected via arithmetic and buffer storage device 3-to sorter 4. Sorter communicates with drive 6 and playback device 7. Channel switch 1, analog-code converter 2, arithmetic and buffer storage device 3, sorter 6 and playback device 7 are connected to each other equal connection with the central control unit bis tester 8. The output of the tester 8 is connected to the third input A of the switch 1. The inputs U, Z, U are connected to the central control unit 5.

The device works as follows.

Inputs X are those that the device accesses cyclically to encode when writing functions with one variable. One or more of the same inputs may be used to input one or more continuous functions with two parameters. In the latter case, the device may re-access some of the inputs X.

For inputs X, moreover, it is characteristic that the gain of the switch of channel 1, reduced to inputs A, varies depending on the magnitude of the incoming signal X by integer powers of two.

Inputs Y are adapted to input statistical signals as they arrive. Multiplexed or submultiplexed coding cycles are fed through inputs Z. When conducting a well test, when the probe is continuously moving, it is advisable to sum up these cycles depending on the depth, and when measuring with a standing probe, depending on the time.

Inputs and start measurement cycles of fast flowing processes or processes with several variables in the presence of continuous signals (inputs X) depending on the information received at outputs Z, if this synchronism is not guaranteed by the measurement itself. In the processing of statistical signals, the inputs U play a similar role, with the difference that they control not only the possibility of admitting effective measurement signals, but also its prohibition.

When recording statistical signals, an example of the role of the inputs can be the measurement of the life of neutrons with an impulse neutron generator or the measurement of the spectrum of neutron gamma radiation with inelastic scattering

or radiation capture, the task being to synchronize with the neutron generator. The time gates required for these measurements are created by the central control device 5.

Inputs X, and Y, transporting the information being processed, are connected to the switchboard of channel 1. The switch of channel 1 selects a measured input for the influence of the central control device 5. The input selected by the switch of channels 1 is associated with the analog converter — code 2, the task of which is to convert the signals into a digital code according to the command of the central control device 5. From the analog to code converter, data is transferred to the arithmetic and buffer memory 3, in which they are processed in accordance with the command of the central control device 5. If, for example, we are talking about information obtained from continuous signals, then it enters the arithmetic and buffer storage device 3 as a content, and if the task is to determine the energy spectrum from a gamma-sensitive detector connected to one of the inputs Y, the incoming data is used by the arithmetic and buffer memory device, to the effect of the central control device 5, i.e. as the nature of the address. The fact that data has arrived here alters the content of the information stored in the address determined by the data. The sorter 4 is designed to sort the data according to the format required by the drive 6, taking into account the commands received through the inputs Z. The drive 6 is a single or multi-channel magnetic storage device operating in continuous or cyclic mode. But a different kind of data storage may also be used, for example, punched tapes. The tasks of the reproducing device 7 include: reproducing data in the recording process and creating an analog recording, presenting the results of reference and control programs obtained from the coitrol device, reproducing data after recording and ensuring the possibility of obtaining associated multi-channel recordings, in addition, drawing families of curves of functions with several variables, etc.

Certain operations and additional blocks of the reproducing device 7 can also be used autonomously from the field equipment if the reproduction of data serves only control purposes. In such cases, depending on the degree of autonomy, some blocks can be used in higher numbers, for example 3 arithmetic and buffer memories, 6 drives, etc.

Claims (1)

To facilitate the loading of information on the cable, the switch of channels 1 and the analog-to-code converter 2 and the partially arithmetic and buffer memory can be implemented in the form of downhole electronic circuits. Invention Formula A device for multiplex digital logging of logging measurements, depending on the effective depth, using multiprograms installed in the priority system, containing a multiplexer, the output of which is connected through an analog-code converter, an arithmetic unit, a buffer memory unit with an input of a sorting unit, at the input of which are included are parallel-connected to each other a multiplier and a playback unit, with the tester output connected to the input of the multiplexer, characterized in that enhancement of functionality by providing the system with priority, a control block with three inputs is inserted into it, the output of which is connected via common bus with multiplexer outputs, with analog-code converter, arithmetic and buffer storage unit, data sorting unit by effective depth, storage unit playback and tester.