阅读说明：本技术 引信药直接燃爆的延期时间测量方法 (Delay time measuring method for direct blasting of fuse powder ) 是由 张宝成 刘文异 宋琪羽 王冬铂 党克 于 2021-08-16 设计创作，主要内容包括：一种引信药直接燃爆的延期时间测量方法,属于工业测试技术领域。本发明的目的是利用激光照射直接引爆引信药的引信药直接燃爆的延期时间测量方法。本发明步骤是：准备工作；从激光束发出照射到引信药上表面开始瞬间到引信药燃爆时间为50ms；光电传感器可以在瞬间捕捉到喷出的火焰；在引信药吸收光能直至燃爆时刻与引信燃爆检测传感器实时捕捉音信下端火焰信号之差即为引信燃爆的延期时间；将测量结果显示在触摸显示屏上。本发明将具有操作简单、测量准确、自动化程度高、可靠性高等优点。具体可应用在火工品的点火测试、爆破等方面。(A method for measuring delay time of direct blasting of a detonator belongs to the technical field of industrial testing. The invention aims to provide a delay time measuring method for direct blasting of a fuse charge, which utilizes laser irradiation to directly detonate the fuse charge. The method comprises the following steps: preparing; the time from the moment when the laser beam is emitted and irradiated on the upper surface of the fuse charge to the explosion of the fuse charge is 50 ms; the photoelectric sensor can capture the sprayed flame instantly; the difference between the light energy absorbed by the detonator until the explosion moment and the flame signal at the lower end of the acoustic fuse is captured by the detonator explosion detection sensor in real time is the delay time of the explosion of the detonator; and displaying the measurement result on the touch display screen. The invention has the advantages of simple operation, accurate measurement, high automation degree, high reliability and the like. The method can be particularly applied to the aspects of ignition test, blasting and the like of initiating explosive devices.)

1. A method for measuring delay time of direct blasting of a detonator is characterized by comprising the following steps: the method comprises the following steps:

firstly, pressing a power button of an electric cabinet, carrying out power-on self-check on a programmable controller, resetting and resetting an internal flag bit of the programmable controller, automatically checking the state of a sensor, the output state of a laser power supply, whether a fuse workpiece is placed in place, whether a safety door of an electric measuring box is closed, starting the operation of an exhaust device and preparing for work;

pressing a start button, receiving a signal input by the start button by a programmable controller to control a laser to emit a laser pulse beam, directly irradiating the laser pulse beam to the surface of the detonator by an included angle of 30 degrees with the vertical direction, wherein the width of the laser beam is 1-1.5mm, and after the surface of the detonator receives the laser beam, light energy is converted into heat energy to promote the surface temperature of the detonator to rapidly rise until explosion, the upper surface of the detonator is subjected to deflagration at the laser irradiation moment, and at the same moment, an internal register of the programmable controller records start time t1, wherein the deflagration time from the moment when the laser beam is emitted to irradiate the upper surface of the detonator is 50 ms;

directly detonating the lower-layer explosive column after the upper surface of the detonator explosive is exploded, so that the detonator explosive is completely exploded, the sound explosive is sprayed out from the flame at the lower end of the sound explosive after the sound explosive is completely exploded, the photoelectric sensor can capture the sprayed flame instantly, and the programmable controller records the time as t 2;

fourthly, when the detonator absorbs the light energy until the explosion moment is time t1, the detonator explosion detection sensor captures a flame signal at the lower end of the sound letter in real time to be time t2, and the difference between t2 and t1 is the delay time of the explosion of the detonator;

and fifthly, after the programmable controller calculates the delay time of the detonator explosion, transmitting data through an RS485 interface, programming through the touch display screen, and displaying the measurement result on the touch display screen.

2. The method for measuring delay time of direct blasting of a detonator as claimed in claim 1, wherein: the delay time measuring device for direct blasting of the detonator is as follows: an inverted L-shaped fixed support (2) is fixedly arranged at one end of the electric cabinet (9), and a laser (1) is arranged at the end part of the inverted L-shaped fixed support (2); a sensor bracket (8) is arranged at the other end of the electric cabinet (9), and a sensor (7) is arranged on the sensor bracket (8); a rotating motor platform (4) is arranged between an inverted L-shaped fixed support (2) on an electric cabinet (9) and a sensor support (8), the motor is fixedly arranged on the rotating motor platform (4), a motor shaft (10) extends out of the upper end of the rotating motor platform (4), a rotating platform (3) is fixedly arranged by taking the motor shaft (10) as a center, a mounting hole (11) is formed in the rotating platform (3), a fuse (5) is arranged on the rotating platform (3) through the mounting hole (11), and a laser emitting end of a laser (1) corresponds to a fuse medicine upper surface (6) at the upper end of the fuse (5); the emitting direction of the laser (1) and the vertical axis direction of the fuse (3) are arranged to form an included angle of 30 degrees.

Technical Field

The invention belongs to the technical field of industrial testing.

Background

The ignition and explosion delay time of the fuse is an important index for evaluating the internal charge quality of the fuse and the performance of the fuse. Because the fuze is internally provided with explosive with different properties, the fuze is not easy to ignite under low energy, the traditional fuze ignition delay time measurement needs the combustion supporting of black powder, and the ignition of the black powder needs to be realized by adopting a bridging thin copper wire. The bridge wire (thin copper wire) type electric ignition adopts a glowing bridge wire as a detonation means, the bridge wire is heated due to the heat effect of current after the bridge wire is electrified, then the heat is transferred to black powder around the bridge wire, and the detonator is ignited after the black powder is exploded. There are problems: 1. the bridge wire type electric ignition operation is complex, the ultra-fine copper wire is not easy to be accurately placed at the same position on the surface of the black powder every time, the charging amount of the 2. the black powder is different from person to person and is difficult to master, and the two conditions greatly influence the measuring precision of the detonator ignition and explosion delay time.

Disclosure of Invention

The invention aims to provide a delay time measuring method for direct blasting of a fuse charge, which utilizes laser irradiation to directly detonate the fuse charge.

The method comprises the following steps:

firstly, pressing a power button of an electric cabinet, carrying out power-on self-check on a programmable controller, resetting and resetting an internal flag bit of the programmable controller, automatically checking the state of a sensor, the output state of a laser power supply, whether a fuse workpiece is placed in place, whether a safety door of an electric measuring box is closed, starting the operation of an exhaust device and preparing for work;

pressing a start button, receiving a signal input by the start button by a programmable controller to control a laser to emit a laser pulse beam, directly irradiating the laser pulse beam to the surface of the detonator by an included angle of 30 degrees with the vertical direction, wherein the width of the laser beam is 1-1.5mm, and after the surface of the detonator receives the laser beam, light energy is converted into heat energy to promote the surface temperature of the detonator to rapidly rise until explosion, the upper surface of the detonator is subjected to deflagration at the laser irradiation moment, and at the same moment, an internal register of the programmable controller records start time t1, wherein the deflagration time from the moment when the laser beam is emitted to irradiate the upper surface of the detonator is 50 ms;

directly detonating the lower-layer explosive column after the upper surface of the detonator explosive is exploded, so that the detonator explosive is completely exploded, the sound explosive is sprayed out from the flame at the lower end of the sound explosive after the sound explosive is completely exploded, the photoelectric sensor can capture the sprayed flame instantly, and the programmable controller records the time as t 2;

fourthly, when the detonator absorbs the light energy until the explosion moment is time t1, the detonator explosion detection sensor captures a flame signal at the lower end of the sound letter in real time to be time t2, and the difference between t2 and t1 is the delay time of the explosion of the detonator;

and fifthly, after the programmable controller calculates the delay time of the detonator explosion, transmitting data through an RS485 interface, programming through the touch display screen, and displaying the measurement result on the touch display screen.

The invention relates to a delay time measuring device for direct blasting of fuse powder, which comprises the following components: an inverted L-shaped fixed support is fixedly arranged at one end of the electric cabinet, and a laser is arranged at the end part of the inverted L-shaped fixed support; a sensor bracket is arranged at the other end of the electric cabinet, and a sensor is arranged on the sensor bracket; a rotary motor platform is arranged between an inverted L-shaped fixed support on the electric cabinet and the sensor support, a motor is fixedly arranged on the rotary motor platform, a motor shaft extends out of the upper end of the rotary motor platform, the rotary platform is fixedly arranged by taking the motor shaft as a center, a mounting hole is formed in the rotary platform, a fuse is arranged on the rotary platform through the mounting hole, and a laser emitting end of a laser corresponds to the upper surface of a fuse powder at the upper end of the fuse; the emitting direction of the laser makes an angle of 30 degrees with the vertical axis direction of the fuse mounting.

The method changes the method that the black powder is ignited by adopting the bridge wire in the traditional method for measuring the delay time of the detonator and the detonator is supported by the black powder into the method that the detonator is directly ignited by laser irradiation, effectively solves the problems of inaccurate measurement of the delay time and complex operation in the traditional method, and ideally solves the problem of time difference between the black powder ignition and explosion and the detonator ignition and explosion in the traditional method. The method can be particularly applied to the aspects of ignition test, blasting and the like of initiating explosive devices.

Drawings

FIG. 1 is a flow chart of the rapid direct test of delay time for a detonator of the present invention;

FIG. 2 is a schematic diagram of the structure of the device of the present invention.

Detailed Description

The method comprises the following steps:

firstly, pressing a power button of an electric cabinet, carrying out power-on self-check on a programmable controller, resetting and resetting an internal flag bit of the programmable controller, automatically checking the state of a sensor, the output state of a laser power supply, whether a fuse workpiece is placed in place, whether a safety door of an electric measuring box is closed, starting the operation of an exhaust device and preparing for work;

pressing a start button, receiving a signal input by the start button by a programmable controller to control a laser to emit a laser pulse beam, directly irradiating the laser pulse beam to the surface of the detonator by an included angle of 30 degrees with the vertical direction, wherein the width of the laser beam is 1-1.5mm, and after the surface of the detonator receives the laser beam, light energy is converted into heat energy to promote the surface temperature of the detonator to rapidly rise until explosion, the upper surface of the detonator is subjected to deflagration at the laser irradiation moment, and at the same moment, an internal register of the programmable controller records start time t1, wherein the deflagration time from the moment when the laser beam is emitted to irradiate the upper surface of the detonator is 50 ms;

directly detonating the lower-layer explosive column after the upper surface of the detonator explosive is exploded, so that the detonator explosive is completely exploded, the sound explosive is sprayed out from the flame at the lower end of the sound explosive after the sound explosive is completely exploded, the photoelectric sensor can capture the sprayed flame instantly, and the programmable controller records the time as t 2;

fourthly, when the detonator absorbs the light energy until the explosion moment is time t1, the detonator explosion detection sensor captures a flame signal at the lower end of the sound letter in real time to be time t2, and the difference between t2 and t1 is the delay time of the explosion of the detonator;

and fifthly, after the programmable controller calculates the delay time of the detonator explosion, transmitting data through an RS485 interface, programming through the touch display screen, and displaying the measurement result on the touch display screen.

The invention relates to a delay time measuring device for direct blasting of fuse powder, which comprises the following components: an inverted L-shaped fixed support 2 is fixedly arranged at one end of the electric cabinet 9, and a laser 1 is arranged at the end part of the inverted L-shaped fixed support 2; a sensor bracket 8 is arranged at the other end of the electric cabinet 9, and a sensor 7 is arranged on the sensor bracket 8; a rotary motor platform 4 is arranged between an inverted L-shaped fixed support 2 on an electric cabinet 9 and a sensor support 8, the motor is fixedly arranged on the rotary motor platform 4, a motor shaft 10 extends out of the upper end of the rotary motor platform 4, a rotary platform 3 is fixedly arranged by taking the motor shaft 10 as a center, a mounting hole 11 is formed in the rotary platform 3, a fuse 5 is arranged on the rotary platform 3 through the mounting hole 11, and a laser emitting end of a laser 1 corresponds to a fuse medicine upper surface 6 at the upper end of the fuse 5; the direction of emission of the laser 1 is at an angle of 30 deg. to the vertical axis in which the fuse 3 is mounted.

The electric control box 9 of the invention is internally provided with a programmable controller, a laser power supply, an operation button, a display and other electric control devices, and the electric control parts adopt the existing electric control devices which can complete the functions of the invention, and the details are not repeated.

The key content of the invention is that black powder which has the function of combustion supporting is removed in the traditional detonator ignition method, and a thin copper wire required for igniting the black powder is also removed, and laser is adopted to directly irradiate the detonator for blasting after the two links are removed. Thus, the traditional complex ignition method is changed into a simple direct ignition method. The detonator explosive can be ignited and exploded by directly irradiating the surface of the detonator with high-energy laser, and the laser emits laser pulses with certain power to directly irradiate the surface of the detonator, so that the detonator can instantly absorb enough heat energy until the detonator is ignited and exploded due to the high energy of the laser beams. Compared with an indirect ignition mode that the fuse powder is ignited by the bridge type resistance wire, the black powder is ignited firstly and then the fuse powder is ignited, the accuracy of ignition delay time measurement is greatly improved, meanwhile, the operation complexity is greatly reduced, and the consistency of measured data is guaranteed. The inaccuracy of measuring delay time by the bridge wire type indirect ignition mode is avoided, and the measurement error of the fuse ignition delay time is reduced.

The invention is composed of a laser power supply, a programmable controller, a laser generator fixing bracket, a fuse tool clamp, a sensor, control software and the like. Firstly, a laser is fixed on an upper support, a fuse is a cylinder and is fixed on a lower support, the distance between the laser and the upper surface of a fuse powder is 30 centimeters, and the fuse powder is vertically and fixedly arranged in the upward direction of a laser irradiation prescription. The laser emitting direction points to the upper surface of the fuse explosive below, and a large amount of smoke and jet are formed when the fuse explosive is exploded, so that the laser mounting and emitting direction and the vertical axis direction form an included angle of 30 degrees, the fuse is horizontally arranged, and the upper surface of the fuse explosive is kept horizontal. The fuse is a cylinder, the outer diameter is 5mm, the inner diameter is 3mm (the diameter of the surface of the blasting powder), the laser is selected to be 5.5W, the laser beam irradiation light spot is circular, the diameter is 1-1.5mm, through tests, the time for blasting caused by the fact that the laser with the power irradiates the surface of the blasting powder is 5ms, and the time response is improved by nearly one order of magnitude compared with the traditional black powder indirect ignition method. When the programmable controller controls the power supply of the laser, the laser emits laser beams to directly irradiate the upper surface of the detonator at the same moment, the programmable controller records the time t1, the photoelectric sensor is arranged below the detonator, the laser beams are perpendicular to the axis of the detonator to emit parallel light, when the detonator is not detonated, most of the light beams emitted by the photoelectric sensor are reflected by the opposite surface and then are automatically received, when the detonator is detonated, part of the light beams are absorbed by the detonating flame of the detonator, the reflected light received by the photoelectric sensor is greatly reduced, and the programmable controller measures the bottom combustion time t2 of the detonator according to the light beams. And the acquired detonation time of the fuze of the photoelectric sensor is compared with the detonation completion time of the fuze by the programmable controller, and the difference (t 2-t 1) is the detonation delay time of the fuze. Here, the firing time measurement error is improved from the conventional second order to the millisecond order.