阅读说明：本技术 一种基于光纤供能的多点***系统及工作方法 (Multipoint blasting system based on optical fiber energy supply and working method ) 是由 王瑾 陈辉 汪添 于 2020-06-29 设计创作，主要内容包括：本发明提供一种基于光纤供能的多点爆破系统及工作方法,包括光纤、激光器、光伏电池、脉冲发生器和起爆装置,脉冲发生器调制输出一个可编程控制的脉冲,后续的激光器接收该脉冲信号并输出光脉冲信号,然后通过光纤传输到光伏电池,光伏电池将光脉冲信号转换为电信号,通过导线传输到起爆装置,触发起爆装置从而引爆起爆装置内部的爆炸物。通过多条光纤完成对多个起爆装置的控制,从而实现多点爆破。由于光纤抗电磁干扰,且不同光纤之间传输干扰低,可在(例如抗高压电、强磁场干扰)特殊环境中完成爆破,具有较强的抗干扰性。(The invention provides a multipoint blasting system based on optical fiber energy supply and a working method thereof, wherein the multipoint blasting system comprises an optical fiber, a laser, a photovoltaic cell, a pulse generator and a blasting device, the pulse generator modulates and outputs a programmable control pulse, a subsequent laser receives the pulse signal and outputs an optical pulse signal, the optical pulse signal is transmitted to the photovoltaic cell through the optical fiber, the optical pulse signal is converted into an electric signal by the photovoltaic cell, the electric signal is transmitted to the blasting device through a lead, and the blasting device is triggered to blast an explosive in the blasting device. The control of a plurality of detonating devices is completed through a plurality of optical fibers, so that multi-point blasting is realized. Because the optical fiber resists electromagnetic interference and the transmission interference between different optical fibers is low, the blasting can be finished in special environments (such as high-voltage resistance and strong magnetic field interference resistance), and the anti-interference performance is strong.)

1. The utility model provides a multiple spot blasting system based on optic fibre energy supply which characterized in that: the device comprises an optical fiber, a laser, a photovoltaic cell, a pulse generator and a detonating device, wherein the pulse generator is connected with the input end of the laser through a lead and used for controlling the laser to emit a light pulse signal; the optical fiber is connected with the output end of the laser and the input end of the photovoltaic cell and is used for transmitting optical pulse signals to be processed; the photovoltaic cell is connected with the detonation device through a lead and used for receiving the optical pulse signals to be processed and converting the optical pulse signals into electric pulse signals, the detonation device is connected with the output end of the photovoltaic cell through a lead and used for receiving the electric pulse signals and transmitting the electric pulse signals to the detonation logic control unit to detonate explosives in the detonation device.

2. A method of operating a fiber optic based powered multipoint blasting system as claimed in claim 1 wherein: the method comprises the following steps:

the method comprises the following steps: setting parameters such as pulse width, pulse period and output time of a pulse generator for outputting an electric pulse signal for controlling the laser;

step two: optical pulse signals output by different lasers are transmitted to corresponding photovoltaic cells through optical fibers;

step three: the photovoltaic cell converts the optical pulse signals into electric pulse signals and transmits the electric pulse signals to the detonating device through a lead;

step four: the detonation device receives the transmitted electric pulse signals, and then controls the detonation logic control unit to send out detonation signals to detonate explosives in the detonation device.

3. The working method of the multipoint blasting system based on the optical fiber energy supply as claimed in claim 2, wherein: in the first step, the detonation of different blasting points is controlled at a required time point by using a blasting control signal output by the pulse generator according to requirements, so that multi-point blasting is achieved.

4. The working method of the multipoint blasting system based on the optical fiber energy supply as claimed in claim 2, wherein: and in the second step, the plurality of lasers output optical pulse signals and respectively transmit the optical pulse signals to the corresponding photovoltaic cells through the plurality of long-distance optical fibers, and due to the fact that optical fiber transmission loss is small, electromagnetic interference is resisted, transmission interference among different optical fibers is low, not only can blasting be completed in a special environment needing interference resistance, but also long-distance detonation control can be achieved.

5. The working method of the multipoint blasting system based on the optical fiber energy supply as claimed in claim 2, wherein: and in the third step, the photovoltaic cell is utilized to convert the optical pulse signals into electric pulse signals so as to control the detonating device.

6. The working method of the multipoint blasting system based on the optical fiber energy supply as claimed in claim 2, wherein: and the detonating device in the fourth step separates the received electric pulse signal into a synchronous control signal and a power supply signal, wherein the synchronous control signal is used for detonating explosives in the detonating device, and the power supply signal supplies power to the whole detonating device.

Technical Field

The invention relates to the technical field of multipoint blasting, in particular to a multipoint blasting system based on optical fiber energy supply and a working method.

Background

At bridge and mine construction initial stage, often utilize blasting unit to come to carry out multiple spot blasting process to the more complicated intractable mountain region of some topography to carry out high efficiency, quick topography to the construction site and handle, however current blasting unit and mode only utilize artifical extension explosive fuse or set up the mode of timing device and carry out the blasting operation, the mode that adopts artifical extension explosive fuse need consider the environmental factor on the way of extension fuse, the suitability is lower, adopt timing device only can carry out the single operation, unable used repeatedly, the loss is great.

Also can often use the multiple spot blasting technique in engineering blasting, owing to set up a plurality of detonation point, need regulation and control detonation time difference. However, delay detonators or digital electronic detonators are mostly used for regulating and controlling the detonation time difference in China at present, and most of the delay detonators adopt chemical agents as delay bodies. The medicament delay has the defects of inaccurate time, poor consistency of delay time, short storage time and the like, has larger delay error and cannot be used in high-precision control blasting. The digital electronic detonator adopts the electronic delay element to replace the traditional chemical agent delay element, and can effectively improve the technical problems of unstable delay precision, poor delay precision and the like of the chemical delay element.

The existing blasting operation mode is greatly influenced by the environment, for example, in the environment of high voltage electricity or strong magnetic field, the transmission of the blasting operation mode by an electric lead can be strongly interfered by electromagnetism, and error blasting is easy to generate; moreover, the transmission loss of the electric lead is high, long-distance and high-precision multipoint blasting is difficult to realize, and the applicability is low; therefore, a multipoint blasting system with electromagnetic interference resistance, high precision and strong applicability is urgently needed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a multipoint blasting system based on optical fiber energy supply and a working method thereof.

The invention provides a multipoint blasting system based on optical fiber energy supply, which comprises an optical fiber, a laser, a photovoltaic cell, a pulse generator and a detonating device, wherein the pulse generator is connected with the input end of the laser through a lead and used for controlling the laser to emit optical pulse signals; the optical fiber is connected with the output end of the laser and the input end of the photovoltaic cell and is used for transmitting optical pulse signals to be processed; the photovoltaic cell is connected with the detonation device through a lead and used for receiving the optical pulse signals to be processed and converting the optical pulse signals into electric pulse signals, the detonation device is connected with the output end of the photovoltaic cell through a lead and used for receiving the electric pulse signals and transmitting the electric pulse signals to the detonation logic control unit to detonate explosives in the detonation device.

The invention also provides a working method of the multipoint blasting system based on the optical fiber energy supply, which comprises the following steps:

the method comprises the following steps: setting parameters such as pulse width, pulse period and output time of a pulse generator for outputting an electric pulse signal for controlling the laser;

step two: optical pulse signals output by different lasers are transmitted to corresponding photovoltaic cells through optical fibers;

step three: the photovoltaic cell converts the optical pulse signals into electric pulse signals and transmits the electric pulse signals to the detonating device through a lead;

step four: the detonation device receives the transmitted electric pulse signals, and then controls the detonation logic control unit to send out detonation signals to detonate explosives in the detonation device.

The further improvement lies in that: in the first step, the detonation of different blasting points is controlled at a required time point by using a blasting control signal output by the pulse generator according to requirements, so that multi-point blasting is achieved.

The further improvement lies in that: and in the second step, the plurality of lasers output optical pulse signals and respectively transmit the optical pulse signals to the corresponding photovoltaic cells through the plurality of long-distance optical fibers, and due to the fact that optical fiber transmission loss is small, electromagnetic interference is prevented, transmission interference among different optical fibers is low, blasting can be finished in special environments needing anti-interference, such as high-voltage electricity and strong magnetic fields, and long-distance detonation control can be achieved.

The further improvement lies in that: and in the third step, the photovoltaic cell is utilized to convert the optical pulse signals into electric pulse signals so as to control the detonating device.

The further improvement lies in that: and the detonating device in the fourth step separates the received electric pulse signal into a synchronous control signal and a power supply signal, wherein the synchronous control signal is used for detonating explosives in the detonating device, and the power supply signal supplies power to the whole detonating device.

The system firstly adopts a pulse generator to modulate parameters such as pulse width, pulse period and output time of electric pulses and then output the parameters to a laser, a subsequent laser receives the electric pulse signals and outputs the modulated optical pulse signals, then the optical pulse signals are transmitted to a photovoltaic cell through an optical fiber, the photovoltaic cell converts the optical pulse signals into electric signals, the electric signals are transmitted to a detonating device through a lead, and the detonating device is triggered to detonate explosives in the detonating device.

The invention has the beneficial effects that: the pulse generator modulates parameters such as pulse width, pulse period and output time of electric pulses according to the conditions of a plurality of explosion points and outputs the parameters to the laser, the subsequent laser receives the pulse signals and outputs the optical pulse signals, the optical pulse signals are transmitted to the photovoltaic cell through the optical fiber, the photovoltaic cell converts the optical pulse signals into electric signals, the electric signals are transmitted to the initiation device through the conducting wire, and the initiation device is triggered to detonate explosives in the initiation device. The invention controls a plurality of detonating devices through a plurality of optical fibers, thereby realizing multi-point blasting. Because the optical fiber transmission loss is low, the electromagnetic interference is resisted, and the transmission interference between different optical fibers is low, the system can not only finish blasting in a special environment needing the electromagnetic interference resistance, but also realize the long-distance detonation control.

Drawings

FIG. 1 is a schematic diagram of the system architecture of the present invention.

Fig. 2 is a block diagram of the mode of operation of the pulse generator of the present invention.

Fig. 3 is a block diagram of a photovoltaic cell of the present invention.

Fig. 4 is a specific working principle block diagram of the detonating device of the invention.

Detailed Description

In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

The embodiment provides a multipoint blasting system based on optical fiber energy supply, which comprises an optical fiber, a laser, a photovoltaic cell, a pulse generator and a detonating device, wherein the pulse generator is connected with the input end of the laser through a lead and used for controlling the laser to emit optical pulse signals; the optical fiber is connected with the output end of the laser and the input end of the photovoltaic cell and is used for transmitting optical pulse signals to be processed; the photovoltaic cell is connected with the detonation device through a lead and used for receiving the optical pulse signals to be processed and converting the optical pulse signals into electric pulse signals, the detonation device is connected with the output end of the photovoltaic cell through a lead and used for receiving the electric pulse signals and transmitting the electric pulse signals to the detonation logic control unit to detonate explosives in the detonation device.

The pulse generator, the working mode block diagram is shown in fig. 2, when an external clock trigger signal passes through a latch and then outputs a pre-trigger pulse, the pulse signal respectively enters a delay module after being branched by a beam splitter

1，2，…，

n, to output a plurality of parallel pulse signals after an adjustable delay time, wherein the delay time1，2，…，n can be according to the sequence of the blast of different blast pointsOr blasting at the same time, and then passing through a wirei1，i2，…，in are transmitted to lasers 1, 2, …,n。

the intensity of the laser 1, 2, …,nthe laser is an 808nm infrared semiconductor laser and has the advantages of small volume, high efficiency, long service life and good reliability. The optical fiber is connected with the input end of the optical fiber and is controlled by the pulse generator to emit an optical pulse signal;

the length of the optical fibers 1, 2, …,na multimode fiber with a core 105um, is connected to the lasers 1, 2, …,nand photovoltaic cells 1, 2, …,nand the optical pulse signal processing module is connected with the optical pulse signal processing module and is used for transmitting the optical pulse signal to be processed.

The concentration of the photovoltaic cells 1, 2, …,nas one of the core devices in the optical fiber power transmission system, the optical fiber power transmission system is implemented by the wires 1, 2, …,nand the optical pulse signal is connected with the detonation control device and the device, receives the optical pulse signal transmitted by the energy transmission optical fiber, converts the optical pulse signal into an electric pulse signal and controls the detonation device. The photovoltaic cell is made of semiconductor material gallium arsenide (GaAs), is designed for red light or near infrared light (the wavelength is 700-870 nm), and has good anti-irradiation performance and high temperature resistance. The specific structure is shown in figure 3, and the photovoltaic cell structure comprises a surface contact layer, an anti-reflection film and an n film from top to bottom respectively^-Type AlGaAs window layer, n-type GaAs emission layer, p-type GaAs base layer, p⁺The AlGaAs back scattering layer, the n-type GaAs buffer layer and the n-type GaAs substrate.

The photovoltaic cell generates photocurrent when light is incident to an interface between a P region and an N region (between an emitting layer and a base layer and between the base layer and a back scattering layer) by using a photoelectric conversion principle; the stronger the optical pulse signal input to the photovoltaic cell, the larger the electrical pulse signal generated. Therefore, the output electrical pulse signal will change with the input optical pulse signal, i.e. generate the corresponding electrical pulse signal.

The initiation devices 1, 2, …,nthe specific working principle diagram is shown in FIG. 4, the electric pulse signal converted by the photovoltaic cell is input to the detonating device, and is separated into a synchronous control signal and a power supply signal after passing through a separation circuit, wherein the synchronous control is performedThe system signal is demodulated by the demodulator and then output to the detonation logic control unit, the detonation logic control unit sends out a detonation signal and transmits the detonation signal to the detonator through the lead, and the positive and negative ends of the lead are discharged to generate sparks to detonate the detonator; the power supply signal transmitted to the power supply management module is output to the detonation logic control unit after being boosted and stabilized in voltage, and is used for providing a stable power supply for the detonation logic control unit, so that the safety and the stability of the detonation device are ensured.

The embodiment also provides a working method of the multipoint blasting system based on the energy supply of the optical fiber, and the method comprises the following steps:

the method comprises the following steps: setting parameters such as pulse width, pulse period and output time of a pulse generator for outputting an electric pulse signal for controlling the laser;

step two: optical pulse signals output by different lasers are transmitted to corresponding photovoltaic cells through optical fibers;

step three: the photovoltaic cell converts the optical pulse signals into electric pulse signals and transmits the electric pulse signals to the detonating device through a lead;

step four: the detonation device receives the transmitted electric pulse signals, and then controls the detonation logic control unit to send out detonation signals to detonate explosives in the detonation device.

In the first step, the detonation of different blasting points is controlled at a required time point by using a blasting control signal output by the pulse generator according to requirements, so that multi-point blasting is achieved.

And in the second step, the plurality of lasers output optical pulse signals and respectively transmit the optical pulse signals to the corresponding photovoltaic cells through the plurality of long-distance optical fibers, and due to the fact that optical fiber transmission loss is small, electromagnetic interference is prevented, transmission interference among different optical fibers is low, blasting is finished in special environments needing interference resistance, such as high-voltage electricity and strong magnetic fields, and long-distance detonation control is achieved.

And in the third step, the photovoltaic cell is utilized to convert the optical pulse signals into electric pulse signals so as to control the detonating device.

And the detonating device in the fourth step separates the received electric pulse signal into a synchronous control signal and a power supply signal, wherein the synchronous control signal is used for detonating explosives in the detonating device, and the power supply signal supplies power to the whole detonating device.

The system firstly adopts a pulse generator to modulate parameters such as pulse width, pulse period and output time of electric pulses and then output the parameters to a laser, a subsequent laser receives the electric pulse signals and outputs the modulated optical pulse signals, then the optical pulse signals are transmitted to a photovoltaic cell through an optical fiber, the photovoltaic cell converts the optical pulse signals into electric signals, the electric signals are transmitted to a detonating device through a lead, and the detonating device is triggered to detonate explosives in the detonating device.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.