阅读说明：本技术 一种中子发生器短节模拟装置 (Neutron generator nipple simulation device ) 是由 郭帅 嵇成高 栾一秀 熊伟 王玉全 毛春玲 李艳琴 于 2020-05-26 设计创作，主要内容包括：本发明公开的一种中子发生器短节模拟装置,通过模拟电路来进行模拟灯丝控制电路、阳极控制电路、靶压电路的电气特性,同时模拟产生相同的反馈信号,将信号通过接插件反馈到控制电路短节,这样既可以替代中子发生器进行整个系统的检测,又避免了产生中子射线的风险。在进行氧活化测井仪器检维修作业时,可以替代中子发生器短节进行仪器的检维修,消除了对人员造成误照射的风险。同时,作为一种技术手段,弥补了原有条件下无法对仪器电路功能进行全面检测的缺点,可以实现对仪器电路全部功能的检测。(The neutron generator pup joint simulation device disclosed by the invention simulates the electrical characteristics of a filament control circuit, an anode control circuit and a target voltage circuit through a simulation circuit, simultaneously simulates and generates the same feedback signal, and the signal is fed back to the control circuit pup joint through a connector, so that the neutron generator can be replaced to detect the whole system, and the risk of generating neutron rays is avoided. When the oxygen activation logging instrument is used for maintenance, the neutron generator short joint can be replaced to perform maintenance of the instrument, and the risk of mistaken irradiation to personnel is eliminated. Meanwhile, as a technical means, the defect that the functions of the instrument circuit cannot be comprehensively detected under the original condition is overcome, and the detection of all the functions of the instrument circuit can be realized.)

1. A neutron generator short section simulation device is characterized by comprising a driving transformer, a voltage doubling circuit and a target voltage sampling circuit which are sequentially connected;

the driving transformer is used for coupling the received target voltage driving output signal of the control circuit short section to the voltage doubling circuit;

the voltage doubling circuit is used for boosting the target voltage driving output signal;

and the target pressure sampling circuit is used for acquiring a target pressure signal according to the boosted voltage signal and transmitting the acquired target pressure signal to the sampling circuit in the control circuit nipple, the sampling circuit uploads the target pressure signal to an acquisition system of the oxygen activation logging instrument, and the acquisition system determines the state of the target pressure control circuit according to the size of the target pressure signal.

2. The neutron generator sub-section simulation device as claimed in claim 1, wherein the voltage doubling circuit comprises multiple stages of voltage doubling units, each stage of voltage doubling unit comprises a diode D and a capacitor C, the anode of the diode D is connected with one end of the capacitor C, the cathode of the diode D is connected with the anode of the diode in the next stage of voltage doubling unit, the other end of the capacitor C is connected with the cathode of the diode in the next stage of voltage doubling unit, and the two ends of the diode D in the first stage of voltage doubling circuit are connected with the secondary side of the driving transformer.

3. The neutron generator sub simulation device of claim 2, wherein the voltage doubling circuit comprises a 9-stage voltage doubling unit.

4. The neutron generator sub simulation device of claim 2, wherein the target voltage sampling circuit comprises a capacitor C1, a capacitor C4, a resistor R1, a resistor R3 and a resistor R4;

one end of the capacitor C1 is connected with one end of the capacitor C4 and then connected with a secondary side tap of the driving transformer, the other end of the capacitor C1 is connected with a cathode of the first voltage doubling unit diode D, the other end of the capacitor C4 is sequentially connected with the resistor R3 and the resistor R4 in series, the other end of the resistor R4 is connected with a capacitor of the last voltage doubling unit, a connection point of the resistor R3 and the resistor R4 is connected with a short section of the control circuit through a plug, and the resistor R1 is connected with two ends of the capacitor C4 in parallel.

5. The neutron generator short section simulation device as claimed in claim 1, further comprising a neutron tube simulation circuit for receiving the filament control signal sent by the control circuit short section, wherein the filament control signal is grounded through the neutron tube simulation circuit to form a loop and generate a filament current, and the state of the filament control circuit is determined according to the magnitude of the filament current.

6. The neutron generator sub-joint simulation device as claimed in claim 5, wherein the neutron tube simulation circuit comprises a resistor R5, one end of the resistor R5 is connected with the control circuit sub, the other end of the resistor R5 is grounded, and a filament control signal sent by the control circuit sub is looped through the resistor R5 and grounded to generate a filament current.

7. The neutron generator sub-joint simulation device as claimed in claim 1 or 5, further comprising an anode ionization simulation circuit for receiving the anode control signal sent by the control circuit sub, wherein the anode control signal is grounded through the anode ionization simulation circuit to form a loop and generate an anode current, and the state of the anode control circuit is determined according to the magnitude of the anode current.

8. The neutron generator sub simulation device of claim 7, wherein the anode isolation simulation circuit comprises a resistor R2, one end of the resistor R2 is connected with the control circuit sub, the other end of the resistor R2 is grounded, and an anode control signal sent by the control circuit sub is looped through the ground via the resistor R2 to generate an anode current.

9. The neutron generator sub-joint simulation device as claimed in claim 8, wherein the target voltage acquisition circuit, the neutron tube simulation circuit and the anode isolation simulation circuit are connected with the control circuit sub-joint through a plug J4.

Technical Field

The invention belongs to the technical field of geophysical exploration, relates to a short section simulation device of a neutron generator in the petroleum field, and is particularly suitable for detection of a pulse neutron oxygen activation logging instrument.

Background

During the process of carrying out maintenance operation on the oxygen activation logging instrument, the maintenance of partial functions can be realized only by applying target pressure to the neutron generator. After the target pressure is applied, the neutron generator emits fast neutrons of 14MeV to the surroundings, and substances around the instrument are irradiated to generate a radiation reaction. The generated secondary gamma rays can penetrate through fluid, cement, oil pipes and other substances with the thickness of tens of centimeters, if the operation is carried out on the ground, the risk is extremely high, and the great personal injury can be caused to the maintenance personnel.

Therefore, a method for replacing the neutron generator short section to carry out instrument detection is needed to be designed, the risk of personnel operation can be eliminated, and the problem that the circuit of the instrument cannot be comprehensively detected and maintained is solved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a neutron generator pup joint simulation device, so that the neutron generator pup joint simulation device can replace a neutron generator and a neutron tube to detect the functions of an instrument.

The invention is realized by the following technical scheme:

a neutron generator short section simulation device comprises a driving transformer, a voltage doubling circuit and a target voltage sampling circuit which are sequentially connected;

the driving transformer is used for coupling the received target voltage driving output signal of the control circuit short section to the voltage doubling circuit;

the voltage doubling circuit is used for boosting the target voltage driving output signal;

and the target pressure sampling circuit is used for acquiring a target pressure signal according to the boosted voltage signal and transmitting the acquired target pressure signal to the sampling circuit in the control circuit nipple, the sampling circuit uploads the target pressure signal to an acquisition system of the oxygen activation logging instrument, and the acquisition system determines the state of the target pressure control circuit according to the size of the target pressure signal.

Preferably, the voltage doubling circuit comprises multiple stages of voltage doubling units, each stage of voltage doubling unit comprises a diode D and a capacitor C, the anode of the diode D is connected with one end of the capacitor C, the cathode of the diode D is connected with the anode of the diode in the next stage of voltage doubling unit, the other end of the capacitor C is connected with the cathode of the diode in the next stage of voltage doubling unit, and the two ends of the diode D in the first stage of voltage doubling circuit are connected with the secondary side of the driving transformer.

Preferably, the voltage doubling circuit comprises 9 stages of voltage doubling units.

Preferably, the target voltage sampling circuit comprises a capacitor C1, a capacitor C4, a resistor R1, a resistor R3 and a resistor R4;

one end of the capacitor C1 is connected with one end of the capacitor C4 and then connected with a secondary side tap of the driving transformer, the other end of the capacitor C1 is connected with a cathode of the first voltage doubling unit diode D, the other end of the capacitor C4 is sequentially connected with the resistor R3 and the resistor R4 in series, the other end of the resistor R4 is connected with a capacitor of the last voltage doubling unit, a connection point of the resistor R3 and the resistor R4 is connected with a short section of the control circuit through a plug, and the resistor R1 is connected with two ends of the capacitor C4 in parallel.

Preferably, the filament lamp device further comprises a neutron lamp tube simulation circuit for receiving the filament control signal sent by the control circuit short section, the filament control signal is grounded through the neutron lamp tube simulation circuit to form a loop, filament current is generated, and the state of the filament control circuit is determined according to the magnitude of the filament current.

Preferably, the neutron lamp tube simulation circuit comprises a resistor R5, one end of the resistor R5 is connected with the control circuit short section, the other end of the resistor R5 is grounded, and a filament control signal sent by the control circuit short section forms a loop through the resistor R5 and the ground to generate a filament current.

Preferably, the anode ionization simulation circuit is further included and is used for receiving the anode control signal sent by the control circuit short section, the anode control signal is grounded through the anode ionization simulation circuit to form a loop, anode current is generated, and the state of the anode control circuit is determined according to the size of the anode current.

Preferably, the anode isolation analog circuit comprises a resistor R2, one end of the resistor R2 is connected to the control circuit sub, the other end of the resistor R2 is grounded, an anode control signal sent by the control circuit sub passes through the resistor R2 and is grounded to form a loop, and an anode current is generated.

Preferably, the target voltage acquisition circuit, the neutron lamp tube analog circuit and the anode isolation analog circuit are connected with the control circuit short joint through a plug J4.

Compared with the prior art, the invention has the following beneficial technical effects:

the simulator of the neutron generator short section provided by the invention simulates the electrical characteristics of the filament control circuit, the anode control circuit and the target voltage circuit through the simulation circuit, simultaneously simulates and generates the same feedback signal, and the signal is fed back to the control circuit short section through the connector, so that the simulator can replace a neutron generator to detect the whole system, and the risk of generating neutron rays is avoided. When the oxygen activation logging instrument is used for maintenance, the neutron generator short joint can be replaced to perform maintenance of the instrument, and the risk of mistaken irradiation to personnel is eliminated. Meanwhile, the defect that the functions of the instrument circuit cannot be comprehensively detected is overcome, and the detection of all the functions of the instrument circuit is realized.

Drawings

FIG. 1 is a block diagram of an exemplary simulation apparatus;

FIG. 2 is a circuit diagram of the simulation apparatus of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.

Referring to fig. 1 and 2, the simulator of the neutron generator short section is connected with the control circuit short section and comprises a target voltage acquisition circuit, a neutron lamp tube simulation circuit and an anode isolation simulation circuit.

The target pressure acquisition circuit comprises a driving transformer, a voltage doubling circuit and a target pressure sampling circuit which are sequentially connected.

The driving transformer is used for coupling the received target voltage driving output signal of the control circuit short section to the voltage doubling circuit;

the voltage doubling circuit is used for boosting the target voltage driving output signal;

and the target pressure sampling circuit is used for acquiring a target pressure signal according to the boosted voltage signal and transmitting the acquired target pressure signal to the sampling circuit in the control circuit nipple, the sampling circuit uploads the target pressure signal to an acquisition system of the oxygen activation logging instrument, and the acquisition system determines the state of the target pressure control circuit according to the size of the target pressure signal.

The neutron lamp tube simulation circuit is used for receiving the lamp filament control signal sent by the control circuit short section, the lamp filament control signal forms a loop through the neutron lamp tube simulation circuit in a grounding mode, lamp filament current is generated, the lamp filament current is transmitted to the acquisition system of the oxygen activation logging instrument through the sampling circuit in the control circuit short section, and the acquisition system determines the state of the lamp filament control circuit according to the size of the lamp filament current.

The anode ionization analog circuit is used for receiving an anode control signal sent by the control circuit short section, the anode control signal is grounded through the anode ionization analog circuit to form a loop and generate anode current, the anode current is transmitted to an acquisition system of the oxygen activation logging instrument through the sampling circuit in the control circuit short section, and the acquisition system determines the state of the anode control circuit according to the size of the anode current.

Specifically, the target voltage acquisition circuit, the neutron lamp tube simulation circuit and the anode isolation simulation circuit are all connected with the control circuit short joint through a plug J1.

The voltage doubling circuit comprises multiple stages of voltage doubling units, each stage of voltage doubling unit comprises a diode D and a capacitor C, the anode of the diode D is connected with one end of the capacitor C, the cathode of the diode D is connected with the anode of a diode in the next stage of voltage doubling unit, the other end of the capacitor C is connected with the cathode of the diode in the next stage of voltage doubling unit, and the two ends of the diode D in the first stage of voltage doubling circuit are connected with two taps on the secondary side of the driving transformer.

The voltage doubling circuit consists of 9-level voltage doubling units and comprises 9 diodes and 8 capacitors, wherein the diodes are respectively a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8 and a diode D9.

The capacitors are respectively a capacitor C2, a capacitor C3, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9 and a capacitor C10.

The target voltage sampling circuit comprises a capacitor C1, a capacitor C4, a resistor R1, a resistor R3 and a resistor R4.

One end of a capacitor C1 is connected with one end of a capacitor C4, then a secondary side tap of the driving transformer is connected, the other end of a capacitor C1 is connected with a cathode of a diode D of the first voltage doubling unit, the other end of the capacitor C4 is sequentially connected with a resistor R3 and a resistor R4 in series, the other end of the resistor R4 is connected with a capacitor of the last voltage doubling unit, and a connection point of the resistor R3 and the resistor R4 is connected with a control circuit short joint through a plug.

The anode isolation analog circuit comprises a resistor R2, one end of a resistor R2 is connected with the control circuit short section through a plug J4, the other end of the resistor R2 is grounded, the resistor R2 is used for verifying the function of the anode power supply part of the control circuit, an anode control signal sent by the control circuit short section passes through the resistor R2 and is grounded to form a loop, and anode current is generated.

The neutron lamp tube simulation circuit comprises a resistor R5, one end of a resistor R5 is connected with the control circuit short joint through a plug J4, the other end of the resistor R5 is grounded, the resistor R5 is used for verifying the function of the control circuit filament power supply part, a filament control signal sent by the control circuit short joint passes through the resistor R5 and is grounded to form a loop, and filament current is generated.

The simulator of the neutron generator short section provided by the invention simulates the electrical characteristics of the filament control circuit, the anode control circuit and the target voltage circuit through the simulation circuit, simultaneously simulates and generates the same feedback signal, and the signal is fed back to the control circuit short section through the connector, so that the simulator can replace a neutron generator to detect the whole system, and the risk of generating neutron rays is avoided. When the oxygen activation logging instrument is used for maintenance, the neutron generator short joint can be replaced to perform maintenance of the instrument, and the risk of mistaken irradiation to personnel is eliminated. Meanwhile, as a technical means, the defect that the functions of the instrument circuit cannot be comprehensively detected under the original condition is overcome, and the detection of all the functions of the instrument circuit can be realized.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.