CN2153632Y

CN2153632Y - Double-sided main electrode detecting device

Info

Publication number: CN2153632Y
Application number: CN93206376U
Authority: CN
Inventors: 袁光荣
Original assignee: LOGGING Co OF SICHUAN PETROLEUM ADMINISTRATION
Current assignee: LOGGING Co OF SICHUAN PETROLEUM ADMINISTRATION
Priority date: 1993-03-19
Filing date: 1993-03-19
Publication date: 1994-01-19
Anticipated expiration: 2003-03-19

Abstract

The utility model relates to a double-sided main electrode detecting device, which can conduct the inspection and the maintenance to the main electrode of the double-sided logging instrument. The double-sided main electrode detecting device is chiefly composed of the signal generator of the electric analogue stratum, a signal detector, a dual trace oscilloscope, etc. The double-sided main electrode detecting device which is suitable for indoor use and outdoor use has the advantages of fast inspection, accurate maintenance, etc.

Description

Double-sided main electrode detecting device

The utility model relates to a kind of checkout gear of oil well logging instrument, is mainly used in the main electrode of dual laterolog instrument is carried out inspection and maintenance.

At present, bilateral is that main electrode and pulse code instrument, bilateral are coupled together to electronic instrument to the detection method of main electrode, connects bilateral to the stratum graduator, utilizes bilateral to carry out the scale inspection to test panel or logging panel.This method is difficult for determining quickly and accurately the working condition of main electrode, in addition, needs four instrument to repair personnel in the whole testing process at least and just can finish, and workload is big, and is consuming time many, and particularly in the open air during logging operation, existing field boundary maintenance main electrode is very difficult.

The purpose of this utility model is, solves the deficiencies in the prior art, provides a kind of field work that is applicable to, the detector of fast detecting main electrode working condition.

The utility model is to realize like this, the simulated formation signal of frequency, variable-magnitude is provided to main electrode to be detected by electronic simulation formation signal generator, this signal is after main electrode is amplified, entering signal detects level, at last be sent to oscillograph, analyze comparison, to determine the working condition of main electrode under different conditions with primary signal, find out failure cause, check, keep in repair.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 shows the use principle block diagram of this detector.Detector 1 is made up of electronic simulation formation signal generator 2, signal detection level 3, dc source 4 and dual trace oscilloscope 7.Electronic simulation formation signal generator 2 provides the analog scaling signal to main electrode to be determined 5.Input stage circuit 6 devices 7 in 3 pairs of main electrodes 5 of signal detection level are formed.Electronic simulation formation signal generator 2 provides the analog scaling signal to main electrode to be determined 5.The output signal of the input stage circuit 6 in 3 pairs of main electrodes 5 of signal detection level is amplified, and 3 amplifying signal is imported oscillograph 7 with 5 original input signal and compared.By the phase place of two signals in the observation oscilloscope, can qualitatively judge the quality of main electrode 5.

Fig. 2 has provided the circuit diagram of this detector.Electronic simulation formation signal generator 2 is to be used for providing to main electrode 5 to be detected the simulated formation scale signal of frequency, variable-magnitude.2 form sine-wave oscillator by amplifier 2A1 and RC frequency-selective network 2R1,2R2,2R3,2R4,2C1,2C2, and output amplitude is 9 volts a sinusoidal signal, exports main electrode 5 and oscillograph 7 to by 2W1 after the 2A2 power amplification.By changing the position of switch 2K1, can obtain required 24.4Hz of dark side direction and shallow side direction and the signal of 196Hz.Regulate 2W1 and can satisfy dark, the shallow side direction of main electrode required magnitude of voltage when 1 Ω, 10 Ω, 100 Ω, 1K Ω, 10K Ω.Signal detection level 3 is made up of amplifying circuit 3A1,3R1,3Rf.Its gain is for K=3Rf/3R1, after the main electrode output signal is amplified, outputs to oscillograph 7 by 6 pin of 3A1.Input stage circuit 6 is made of transformer T, amplifier 6A1 and 6Rf.Its transfer function is Uo=6Rf/N * Ii.Wherein, N is a transformation ratio, and the analog signal that Ii is provided to main electrode 5 for detector 1 is at the electric current of the elementary formation of transformer T.6Rf and N are definite value, when input signal one regularly, the value of output signal U o and the difference reaction of theoretical value go out the quality of the working condition of T and 6A1 in the input stage 6.

The utlity model has following advantage:

1, utilize this detector to carry out maintenance and inspection to main electrode quickly and accurately, use equipment is few, and workload is little, and detection time is short.

2, can the complete inspection main electrode each is extremely bad on the surface, break-make, the insulation of inner each contact are suitable for indoor and open-air use.

Claims

1, bilateral is made up of electronic simulation formation signal generator 2, signal detection level 3, low-voltage dc power supply 4 and dual trace oscilloscope 7 to the main electrode detector, wherein, electronic simulation formation signal generator 2 provides the simulated formation signal of frequency, variable-magnitude to main electrode 5 to be detected, this signal is after main electrode input stage 6 is amplified, entering signal detects level 3, at last be sent to oscillograph,, can carry out inspection and maintenance to main electrode bilateral by analyzing relatively with primary signal.