CN210666035U

CN210666035U - Novel synchronous triggering device applied to seismic wave geological exploration

Info

Publication number: CN210666035U
Application number: CN201920925020.8U
Authority: CN
Inventors: 程涌; 文义明; 刘聪; 聂琪; 李宛鸿
Original assignee: Kunming Metallurgy College
Current assignee: Kunming Metallurgy College
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-06-02
Anticipated expiration: 2029-06-19

Abstract

The utility model relates to a be applied to seismic wave geological exploration's novel synchronous trigger device belongs to geological exploration technical field, be applied to seismic wave geological exploration's novel synchronous trigger device include exploder, explode synchronous trigger device, control station, seismic data acquisition station, wave detector, power supply unit, exploder and explode synchronous trigger device and be connected, explode synchronous trigger device and include pulse transformer and pulse shaping circuit, the utility model provides a be applied to seismic wave geological exploration's novel synchronous trigger device effectively solves the reason that seismic wave exploration in-process data acquisition time difference produced, utilizes the electromagnetic induction principle to improve synchronous trigger device, makes it have higher reliability and longer life, can effectually be applied to seismic exploration work.

Description

Novel synchronous triggering device applied to seismic wave geological exploration

Technical Field

The utility model belongs to the technical field of geological exploration, specifically speaking relates to a be applied to seismic exploration's novel synchronous trigger device.

Background

Geophysical exploration is a method and theory for researching geological structures and exploring underground minerals by using the difference of lithology of rocks or physical properties of minerals in the crust, and according to different detection principles, the geophysical exploration method can be divided into the following steps: seismic wave exploration, gravity exploration, magnetic exploration, electrical exploration and the like, wherein the seismic wave exploration is the most common geophysical exploration method. Seismic wave exploration is to collect reflected and attenuated seismic signals by transmitting seismic waves generated by artificially exciting a seismic source in stratums with different elasticity, analyze and invert the signals, and explore underground geological conditions, and the seismic wave exploration is important to be applied in the fields of surveying of metal and nonmetal mineral resources, oil, gas, coal energy, earthquake disasters and the like.

In seismic observation, time synchronization is an important technology in data acquisition, the precision of the time synchronization directly influences the quality of seismic data acquisition, and the time synchronization has important significance for subsequent seismic data analysis and seismic inversion work. In the existing seismic exploration engineering, in order to solve the problem of time synchronization of seismic source excitation and data acquisition, most of the seismic source excitation and data acquisition devices use synchronous trigger devices, the synchronous trigger devices convert high-voltage signals of an exploder into safe trigger signals through voltage reduction to start the seismic data acquisition equipment to work, but a voltage reduction circuit adopted by the traditional trigger device has the defects that components are easy to damage and the trigger signals are unstable in the field seismic exploration engineering. For example, the trigger signal of the synchronous trigger device does not make the acquisition equipment work in the blasting process, which may cause the waste of the gun; if the triggering times are not synchronous, the error of the seismic source positioning can reach thousands of meters or even dozens of kilometers within one second. Causing great errors in post-processing of seismic data. Therefore, the synchronous data acquisition is ensured to have important significance in seismic wave exploration.

Therefore, there is a need to improve the existing synchronous trigger device, enhance the stability of the trigger signal, solve the problems existing in the prior art, and make it have higher practicability.

Disclosure of Invention

In order to overcome the problem that exists among the background art, the utility model provides a be applied to seismic wave geological exploration's novel synchronous trigger device effectively solves the reason that seismic wave exploration in-process data acquisition time difference produced, utilizes the electromagnetic induction principle to improve synchronous trigger device, makes it have higher reliability and longer life, can effectually be applied to seismic exploration work.

In order to achieve the purpose, the utility model is implemented according to the following technical scheme:

be applied to seismic wave geological exploration's novel synchronous trigger device include exploder, explode synchronous trigger device, control station, seismic data acquisition station, wave detector, power supply unit, exploder and explode synchronous trigger device and be connected, explode synchronous trigger device and include pulse transformer and pulse shaping amplitude limiting circuit, pulse transformer one end is passed through exploder and is connected with the explosion detonator, one end is passed through pulse shaping amplitude limiting circuit and is connected with seismic data acquisition station, seismic data acquisition station is connected with power supply unit, control station and wave detector respectively.

Furthermore, the explosion synchronous triggering device utilizes the principle of Faraday's law of electromagnetic induction to generate a safe voltage signal capable of triggering the acquisition equipment through a magnetic induction coil.

Furthermore, a pulse transformer magnetic ring inner hole is formed in the shell of the blasting synchronous triggering device, and a blasting bus of the blasting device penetrates through the pulse transformer magnetic ring inner hole.

Furthermore, the amplitude of the trigger signal of the explosion synchronous trigger device is 4V, the response time is 1us, and the trigger duration is 0.5 ms.

The utility model has the advantages that:

1. the utility model provides a novel synchronous trigger device applied to seismic wave geological exploration, which effectively solves the reason of data acquisition time difference in the seismic wave exploration process, utilizes the principle of Faraday's law of electromagnetic induction, generates safe voltage signals capable of triggering acquisition equipment through a magnetic induction coil to improve the synchronous trigger device, converts high-voltage signals generated by an exploder into safe voltage signals capable of triggering the data acquisition equipment so as to achieve the time synchronization of explosive explosion (manual seismic source excitation) and the work of the data acquisition equipment;

2. a small hole is arranged in the middle of a shell of the detonating synchronous trigger device, any line in blasting lines penetrates through the hole (an inner hole of a magnetic ring of a pulse transformer), when the detonator detonates, generated current flows through the magnetic ring to generate detonating synchronous induction pulses, and generated electromotive force is converted into safe low-voltage trigger signals to be output to a collection station through the action of a rectification circuit and an amplitude modulation circuit of an electric bridge, so that synchronous triggering between the detonator and the collection station is achieved.

3. The synchronous triggering device for the detonation can convert a high-voltage signal generated by the detonator into a triggerable safety signal of data acquisition equipment in seismic exploration, improves the stability of the device, prolongs the service life of the device, and can be effectively applied to seismic exploration. And the design that the magnetic ring coil and the blasting bus are isolated is adopted by the circuit, so that potential safety hazards are avoided, and the circuit can be effectively applied to seismic exploration.

Drawings

Fig. 1 is a block diagram of the connection structure of the present invention;

FIG. 2 is a block diagram of the connection structure of the synchronous triggering device for blasting of the present invention;

FIG. 3 is a circuit diagram of the explosion synchronous triggering device of the present invention;

in the figure, 1-an exploder, 2-an explosion synchronous trigger device, 3-a pulse transformer, 4-a pulse shaping amplitude limiting circuit, 5-an explosion detonator, 6-a control station, 7-a seismic data acquisition station, 8-a detector and 9-a power supply unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.

As shown in fig. 1-3, the novel synchronous triggering device applied to seismic wave geological exploration comprises an exploder 1, an explosion synchronous triggering device 2, a control station 6, a seismic data acquisition station 7, a geophone 8 and a power supply unit 9.

The detonator 1 is connected with the detonating synchronous trigger device 2, the detonating synchronous trigger device 2 comprises a pulse transformer 3 and a pulse shaping amplitude limiting circuit 4, one end of the pulse transformer 3 is connected with the detonating primer 5 through the detonator 1, the other end of the pulse transformer is connected with the seismic data acquisition station 7 through the pulse shaping amplitude limiting circuit 4, the seismic data acquisition station 7 is respectively connected with a power supply unit 9, a control station 6 and a detector 8, the amplitude of a trigger signal of the detonating synchronous trigger device 2 is 4V, the response time is 1us, and the trigger duration is 0.5ms, the detonating synchronous trigger device 2 can convert a high-voltage signal generated by the detonator 1 into a triggerable safety signal of data acquisition equipment in seismic exploration, the stability and the service life of the device are improved, the device can be effectively applied to seismic exploration work, and the circuit adopts the design of isolating a magnetic ring coil and a detonating bus, the potential safety hazard of avoiding can effectual application in seismic exploration work.

As shown in fig. 1, when the detonator 1 presses the detonation switch, the explosive is ignited by the detonation wire, so as to excite the artificial seismic source, thereby generating a seismic wave; meanwhile, the exploder 1 can send a trigger signal, namely a data acquisition starting command, to the seismic wave data acquisition equipment, namely the instrument acquisition starting time takes the time point of the artificial seismic source excitation as the starting end. Therefore, the origin of the seismic data acquisition moveout is mainly due to the time difference between the "time of waiting for the verification of the discontinuity signal TB (also called an explosion signal)" and the "time of arrival of the acquisition start command at the data acquisition device". Therefore, in seismic exploration, a synchronous triggering device is used between the exploder 1 and the acquisition station, and a high-voltage signal generated by the exploder 1 is converted into a safe voltage signal which can trigger the data acquisition equipment, so that the time synchronization of explosive explosion (artificial seismic source excitation) and the operation of the data acquisition equipment is achieved.

As shown in fig. 2, the detonator 1 used in seismic exploration is used to generate high voltage to detonate the explosive buried underground, so as to generate artificial seismic source, and the triggering signal for seismic data acquisition needs low voltage pulse signal with voltage below 5V, so the synchronous triggering device needs to convert the high voltage pulse generated by the detonator 1 into low voltage pulse signal.

As shown in fig. 3, a small hole is arranged in the middle of the shell of the detonating synchronous trigger device 2, any line in the blasting line passes through the hole (inner hole of a magnetic ring of a pulse transformer), when the detonator 1 detonates, the generated current flows through the magnetic ring to generate detonating synchronous induction pulse, and the generated electromotive force is changed into a safe low-voltage trigger signal to be output to an earthquake acquisition station through the action of a rectification circuit and an amplitude modulation circuit of an electric bridge, so that the synchronous triggering between the detonator 1 and the acquisition station is realized.

The utility model provides a novel synchronous trigger device applied to seismic wave geological exploration, which effectively solves the reason of data acquisition time difference in the seismic wave exploration process, utilizes the principle of Faraday's law of electromagnetic induction, generates safe voltage signals capable of triggering acquisition equipment through a magnetic induction coil to improve the synchronous trigger device, converts high-voltage signals generated by an exploder into safe voltage signals capable of triggering the data acquisition equipment so as to achieve the time synchronization of explosive explosion (manual seismic source excitation) and the work of the data acquisition equipment;

a small hole is arranged in the middle of a shell of the detonating synchronous trigger device, any line in blasting lines penetrates through the hole (an inner hole of a magnetic ring of a pulse transformer), when the detonator detonates, generated current flows through the magnetic ring to generate detonating synchronous induction pulses, and generated electromotive force is converted into safe low-voltage trigger signals to be output to a collection station through the action of a rectification circuit and an amplitude modulation circuit of an electric bridge, so that synchronous triggering between the detonator and the collection station is achieved.

The synchronous triggering device for the detonation can convert a high-voltage signal generated by the detonator into a triggerable safety signal of data acquisition equipment in seismic exploration, improves the stability and the service life of the device, can be effectively applied to seismic exploration work, adopts a design of isolating a magnetic ring coil from a blasting bus, avoids potential safety hazards, and can be effectively applied to seismic exploration work.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a be applied to seismic wave geological exploration's novel synchronization trigger device which characterized in that: be applied to seismic wave geological exploration's novel synchronous trigger device include exploder, explode synchronous trigger device, control station, seismic data acquisition station, wave detector, power supply unit, exploder and explode synchronous trigger device and be connected, explode synchronous trigger device and include pulse transformer and pulse shaping amplitude limiting circuit, pulse transformer one end is passed through exploder and is connected with the explosion detonator, one end is passed through pulse shaping amplitude limiting circuit and is connected with seismic data acquisition station, seismic data acquisition station is connected with power supply unit, control station and wave detector respectively.

2. The novel synchronous triggering device applied to seismic wave geological exploration according to claim 1, is characterized in that: the explosion synchronous triggering device utilizes the principle of Faraday's law of electromagnetic induction to generate a safe voltage signal capable of triggering the acquisition equipment through a magnetic induction coil.

3. The novel synchronous triggering device applied to seismic wave geological exploration according to claim 1, is characterized in that: and a blasting bus of the blasting device penetrates through the inner hole of the pulse transformer magnetic ring.

4. The novel synchronous triggering device applied to seismic wave geological exploration according to claim 1, is characterized in that: the amplitude of the trigger signal of the explosion synchronous trigger device is 4V, the response time is 1us, and the trigger duration is 0.5 ms.