The control device transmitting polarized laser radiation to the optical detonators on the basis of magneto-optical spatial-temporal modulator

 

The invention relates to control the laser radiation and blast technique. The developed device transmission control polarized laser radiation to the optical detonators on the basis of magneto-optical spatial-temporal modulator. It includes optical detonators connected with a source of polarized laser radiation through optical fibers. Magneto-optical spatial-temporal modulator consists of a transparent plate of a magnetic material placed between the Helmholtz coils included under pairs. Helmholtz coils associated with the magnetic pulser through the programmable electronic key. The input end of each of the optical fibers from the optical detonators docked with the corresponding Helmholtz coil. The technical result of the invention is the ability to more precisely control the process of detonation of explosives. 1 Il.

The invention relates to the use of the energy of the explosion and can be applied in mining industry, exploration and Geophysics, when holding zero-cycles of the construction work, machinery for chemical processing of materials with the aim increases privcate the device consists of a curb explosive (BB) enclosure with an optically transparent window, the surface is covered with metal foil. The window is sent a powerful light pulse from the laser. Under the action of laser radiation foil evaporates, the resulting shock wave initiates CENTURIES in the housing. Using fiber-optic devices in one laser to initiate several optical detonators similar designs /1/.

The disadvantages of this device are the necessity of using laser pulses of high power, resistant to optical breakdown of the fibers, and high energy costs, and the complexity of the job and maintain the time delay between the shattered groups of charges.

Essentially solved problems the closest device is a device for the transmission of laser pulses to the optical detonators using a switching device (opto-mechanical modulator), through which the management of laser pulses transmitted to the optical detonators /2/. Opto-mechanical modulator consists of a rectangular prism, rotating at a given frequency. The modulator is equipped with a control unit and speed control of a rectangular prism. Thus, this is managed Pere

The disadvantage taken as a prototype of the proposed device is an opto-mechanical modulator used to control the laser radiation of a rectangular prism, rotating at a given frequency. This control has a limited dynamic features that are characteristic for modulators of this type. The rotation of the prism is carried out by Electromechanical means, which reduces the accuracy of the control and set the time delay to actuate the optical detonators because of the strong variation caused by the instability of the rotation frequency. The accuracy of the delay time greatly depends on the precision of focusing on the optical fibers reflected by the prism of light pulses, which complicates management, reduces the reliability of the entire device.

The purpose of the invention is improving the efficiency of the device by increasing the precision of control with it, the processes of initiation of detonation in temporal and spatial sequences that allows you to programmatically set the order of actuation of the optical detonators.

This objective is achieved in that the control device transmitting polarized laser radiation is political detonators, associated with a source of polarized laser radiation through optical fibers and optical spatio-temporal modulator, a magneto-optical spatial-temporal modulator consists of a transparent plate of a magnetic material placed between the Helmholtz coils included according to the pairs of Helmholtz coils associated with the magnetic pulser through the programmable electronic key, and the input end of each of the optical fibers from the optical detonators docked with the corresponding Helmholtz coil.

Comparative analysis with the prototype set the difference of the proposed device, consisting in the application of magneto-optical spatial-temporal modulator for high-speed and high-precision control of polarized laser light supplied to the optical detonators in the time interval 2010-910010-3with an accuracy of not less than 5010-9C. All this allows to increase the efficiency of the device, thereby to improve the quality and reliability of blasting. Thus, the proposed device complies with the criteria which begins from the prototype, not identified, and so they ensure it conforms to the criterion of "substantial differences".

Device for transmission of polarized laser radiation to the optical detonators are represented schematically on the drawing.

The device includes an optical detonators 1, connected through the optical fibers 2 with a source of polarized laser radiation 3 through the magneto-optical time-space modulator 4 (switching device), consisting of a transparent plate of a magnetic material 5 with high speed movement of domain boundaries placed between the Helmholtz coils 6, included according to the pairs. In the initial state, this transparent plate of a magnetic material 5 a uniformly magnetized and is opaque to laser radiation polarized perpendicular to the magnetization of a magnetic material. Helmholtz coils 6 are connected through the programmable electronic key 7 to the magnetic pulser 8. Polarized laser radiation 9 from a source of polarized laser radiation 3 drops on one side 10 on the transparent plate of a magnetic material 5 placed between the Helmholtz coils 6. The input end 11 of each of the optical fibers 2 of the optical detonator 1 is docked with the corresponding end face 12 calontir based on the magneto-optical spatial-temporal modulator operates as follows. Polarized laser radiation 9 from a source of polarized laser radiation 3 falls by 10. Under the action of a control pulse magnetic field using one of the Helmholtz coils 6 is alternating magnetization transparent plate of a magnetic material 5, as a result, the transmittance of the transparent plate of a magnetic material 5 in the area of coupling of the input end 11 of the optical fiber 2 with the output end 12 of the Helmholtz coil 6 becomes equal to 100%. Impulse polarized laser radiation 9, having passed through the light guide 2, initiates detonation in a given optical detonator 1. Through the rest of the Helmholtz coils 6 in a magneto-optical spatial-temporal modulator 4 polarized laser radiation 9 at this time is not passed from a source of polarized laser radiation 3. The effect of modulation of the incident polarized laser radiation 9 is achieved through high-speed (up to 20 km/s for weak ferromagnets) motion of a domain wall in a transparent plate of a magnetic material 5, which leads to the change of the transmittance of the transparent plate of a magnetic material 5 up to 100%. The sequence proceeds to the Helmholtz coils 6 of the control pulses of the magnetic field from Gigot high-speed and high-precision control of the laser pulses, supplied from a source of polarized laser radiation 3 in the optical detonators 1 in a wide time interval 2010-910010-3C.

Thus, the control device for transmission of the laser pulses to the optical detonators reaches its goal of improving the efficiency of the device by increasing the precision of control with it, the processes of initiation of detonation in temporal and spatial sequences that allows you to programmatically set the order of actuation of the optical detonators.

Literature 1. U.S. patent 3812783, CL F 42 With 13/02, 1974.

2. RF patent 2089843, CL F 42 With 13/02, 1997.

Claims

The control device transmitting polarized laser radiation to the optical detonators on the basis of magneto-optical spatial-temporal modulator comprising an optical detonators connected with a source of polarized laser radiation through optical fibers and optical spatio-temporal modulator, characterized in that the magneto-optical spatial-temporal modulator consists of Prolegomena associated with the magnetic pulser through the programmable electronic key, and the input end of each of the optical fibers from the optical detonators docked with the corresponding Helmholtz coil.

 

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FIELD: blasting operation.

SUBSTANCE: in the method for electric bursting of n extended explosive charge along the line of its layout conversion of the electric energy partially to the thermal and kinetic energy is realized with the aid of two parallel wires connected to a high-voltage source so that one end of the first wire would serve as a positive terminal, and the opposite end of the second wire would serve as a negative terminal of two wires moving toward each other producing eventually a shock-wave initiation of the primary charge of explosive material along the line of their layout providing a good synchronism of formation of the detonation front in an extended explosive charge.

EFFECT: reduced time difference down to 1Ás of blasting of an extended explosive charge at lengths within 0.1 to 0.5 m.

3 dwg

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