CN103411487A - Electronic detonator ignition energy control method - Google Patents

Abstract

The invention discloses an electronic detonator ignition energy control method. An electronic detonator safety ignition control circuit is adopted and consists of serial electronic switches in energy storage elements and ignition elements; electronic switches generate ignition signal control by the ignition control logic; the ignition control logic controls the electronic switches to present on-off square waves; the electronic switches control the electricity discharge process of the energy storage elements. According to the invention, through controlling the on-off of a capacity electricity discharge loop, the capacity electricity discharge time is prolonged artificially; the time for receiving the capacity electricity discharge energy by bridge wires is prolonged correspondingly; the ignition capacity of a capacitor can be improved, thereby reducing the volume of a capacitor, and improving the detonation capacity.

Description

A kind of electric detonator ignition energy control method

Technical field

The present invention relates to the electric detonator field, be specifically related to a kind of electric detonator ignition energy control method.

Background technology

Electric detonator is by the delay powder in common delay electric detonator, replaces with the Novel detonator of digital circuit.The fire element of electric detonator is the bridge silk, uses storage capacitor to originate as firing energy, and the fuel factor of utilizing the electric current on the bridge silk to produce is lighted ignition charge, detonating primer.

The digital circuit of electric detonator will proceed in detonator shell together with igniting head (comprising storage capacitor), so the size of storage capacitor is as far as possible little, prerequisite is that work the successful detonating primer that enough energy can holding circuit will be arranged.The volume of storage capacitor is subjected to the restriction of capacity and rated voltage, capacitance large and (or) rated voltage is high, the corresponding increasing of the volume of electric capacity, the ability of igniting is large; Capacitance little and (or) rated voltage is low, the electric capacity volume is corresponding to be reduced, but the ability of igniting reduces.So capacity, rated voltage to electric capacity will consider, to meet volume and the requirement of the ability of igniting.

Electric discharge causes that the process of medicine hair fire is the equilibrium process of a bridge silk (comprising the medicine head) received energy and off-energy to electric capacity to the bridge silk, to an electric capacity of giving constant volume and rated voltage, when the bridge silk is discharged, if discharge time is too short, when the medicament of igniting does not reach bursting point, electric discharge finishes, and at this moment the bridge silk begins to cool down, and is equivalent to increase energy loss.Therefore need to select the discharge time an of the best.

Summary of the invention

Goal of the invention: the invention provides a kind of electric detonator ignition energy control method, by controlling the break-make of electric detonator storage capacitor discharge loop, control capacitance discharge time, improve the ignition ability of electric capacity, reduce the electric capacity volume.

Technical scheme: a kind of electric detonator ignition energy control method, comprise electric detonator safety ignition control circuit, described electric detonator safety ignition control circuit is become with series connection electronic switch set in igniting element by energy-storage travelling wave tube, electronic switch produces ignition signal by the IGNITION CONTROL logic and controls, described IGNITION CONTROL logic control electronic switch presents the break-make square wave, and electronic switch is controlled the discharge process of energy-storage travelling wave tube.

As optimization: described electronic switch is the Mosfet device.

Beneficial effect: the present invention, by the break-make of control capacitance discharge loop, artificially extends capacitor discharge time, the corresponding time that extends bridge silk reception capacitor discharge energy, can improve the ignition ability of electric capacity, and thereby can reduce the electric capacity volume, improve initiating ability.

The accompanying drawing explanation

Fig. 1 is electric detonator storage capacitor ignition circuit schematic diagram;

Fig. 2 is storage capacitor discharge process punching energy waveform;

Fig. 3 is storage capacitor discharge process current waveform;

Fig. 4 is the break-make waveform of electronic switch under the control of IGNITION CONTROL logic;

Fig. 5 is the current waveform on the bridge silk.

The specific embodiment

The invention will be further described below in conjunction with specific embodiment.

Embodiment

As shown in Fig. 1,2,3,4,5, a kind of electric detonator ignition energy control method, comprise electric detonator safety ignition control circuit, the electric detonator safety ignition control circuitelectronic switch 11 of connecting in energy-storagetravelling wave tube 15 andigniting element 14 forms,electronic switch 11 producesignition signal 13 by IGNITION CONTROL logical one 2 and controls, IGNITION CONTROL logical one 2 is controlledelectronic switch 11 and is presented the break-make square wave, andelectronic switch 11 is controlled the discharge process of energy-storage travelling wave tube 15.Electronic switch 11 is the Mosfet device.

Fig. 1 is the schematic diagram of general electric detonator storage capacitor ignition circuit, energy-storagetravelling wave tube 15 is storage capacitor, andelectronic switch 11 is generally the Mosfet device, after IGNITION CONTROL logical one 2 producesignition signal 13, controlelectronic switch 11 conductings, energy-storagetravelling wave tube 15 is byigniting element 14 electric discharges.

Fig. 2,3 is the discharge waveform of Fig. 1.Fig. 2 is punching energy waveform, and Fig. 3 is current waveform.This waveform modelling be the ideal capacitance discharge curve, capacitance is 200uf, initial voltage is 15V, the discharge loop all-in resistance is 3 ohm.As seen from Figure 3, in the time, electric current drops to 1A from the 5A left and right at electric discharge 1ms; During to 2ms, electric current is very little.If at this moment, igniting head is not reaching quick-fried point, and detonating may be failed.

Fig. 4,5 is ignition control method of the present invention.Fig. 4 is the break-make waveform ofelectronic switch 11 under the control of IGNITION CONTROL logical one 2, and Fig. 5 is the current waveform on the bridge silk.As can be seen from Figure 5, the time lengthening that electric current drops to 1A has arrived the 1.4ms left and right, and the Fig. 3 that compares, extended 40%, is conducive to like this point of amorce under the effect of bridge silk heating, produces chemical change, finally ignites.

The present invention, by the break-make of control capacitance discharge loop, artificially extends capacitor discharge time, the corresponding time that extends bridge silk reception capacitor discharge energy, can improve the ignition ability of electric capacity, and thereby can reduce the electric capacity volume, improve initiating ability.

Claims (2)

1. electric detonator ignition energy control method, comprise electric detonator safety ignition control circuit, the described electric detonator safety ignition control circuit electronic switch (11) of connecting in energy-storage travelling wave tube (15) and igniting element (14) forms, electronic switch (11) produces ignition signal (13) by IGNITION CONTROL logic (12) and controls, it is characterized in that: described IGNITION CONTROL logic (12) is controlled electronic switch (11) and is presented the break-make square wave, and electronic switch (11) is controlled the discharge process of energy-storage travelling wave tube (15).

2. electric detonator ignition energy control method according to claim 1, it is characterized in that: described electronic switch (11) is the Mosfet device.

Images