CN201311251Y - Intrinsic safety type initiating system of electronic detonator - Google Patents
Intrinsic safety type initiating system of electronic detonator Download PDFInfo
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- CN201311251Y CN201311251Y CNU2008201241611U CN200820124161U CN201311251Y CN 201311251 Y CN201311251 Y CN 201311251Y CN U2008201241611 U CNU2008201241611 U CN U2008201241611U CN 200820124161 U CN200820124161 U CN 200820124161U CN 201311251 Y CN201311251 Y CN 201311251Y
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Abstract
The utility model discloses an intrinsic safety type initiating system of an electronic detonator, and a control system of the detonator is provided with a protecting circuit with intrinsic safety property; the protection circuit comprises an anti-jamming circuit, a low-voltage direct-current conversion protecting circuit, a surge protecting circuit and an isolation voltage-stabilizing ignition control circuit, wherein the surge protecting circuit is arranged between an energy storage capacitor of the electronic detonator and a single chip control circuit; the output end of the surge protecting circuit is connected with the input end of the single chip control circuit through a level switching unit circuit and an RS-485 chip, and the input end of the surge protecting circuit is connected with the output end of the energy storage capacitor; the low-voltage direct-current conversion protecting circuit and the voltage-stabilization protecting circuit are arranged between the energy storage capacitor of the electronic detonator and an initiating circuit of a detonator initiator, and an isolation voltage-stabilizing circuit is arranged between the energy storage capacitor of the electronic detonator and an electronic switch of a detonator initiating circuit simultaneously.
Description
Technical field
The utility model relates to a kind of intrinsic safety type electric detonator detonation system.
Background technology
According to International Electrotechnical Commission's definition of (being called for short IEC), intrinsicallysafecircuit is meant that electric spark that produces under the malfunction of operate as normal or regulation and fuel factor all can not be lighted the circuit of the explosive gas mixture of regulation under the experimental condition of regulation.So-called intrinsically safe circuit is realized by the energy of restriction electric spark and two possibilities of fuel factor ignition source.Therefore, the design of intrinsic safe explosion-proof equipment must be started with from the restriction energy, voltage and current in the circuit is limited in the allowed band, with assurance equipment operate as normal be short-circuited or situation such as components and parts damage under the electric spark and the fuel factor that produce all can not cause hazardous gas blast that may exist around it.For general circuit, safe spark parameter depends primarily on voltage (U), electric current (I), inductance (L), electric capacity (C) etc.The electric capacity that electric spark is played a major role, the energy of inductive circuit suppress and to fuel factor, i.e. the braking measure of the surface temperature of element, lead, outer metal housing had both become intrinsically safe circuit key to the issue to be solved.Intrinsicallysafecircuit is safest in the electric apparatus for explosive atmospheres, even because nonserviceable down, it also can not set off an explosion, and is safe from " essence " just, so be called essential safe type, is called for short intrinsic safety type.
Existing electric detonator detonation system generally is made up of one group of electric detonator that detonator initiator and control are ignited, and adopts the mode of supply lines and the compound use of order wire between electric detonator and the initiator usually.Adopt storage capacitor to store control chip work, the required energy of point of amorce, make it only after the preparation of detonating (connection, detection, defer time setting etc.) is finished, just be in state to be detonated.Initiate quick-fried ready signal by initiator by order wire when detonating, initiation system cooperates the special-purpose equipment with specific coding program, and by the detonator of encoder identification diverse location, the sub-detonator of every generating all has the ID sign indicating number of oneself, has the electronic security(ELSEC) insurance function.On-the-spot firing order and the time delay interval set, or adopt the detonator of constant time lag time, the specific program of detonating is set, so that reach the explosion and crushing effect of expection, reduce vibrations, the sound and other harm.
In the utility model, be provided with storage capacitor, filter circuit and single chip machine controlling circuit, electronic switch and igniter in the intrinsic safety type electric detonator, thereby the break-make of single chip machine controlling circuit control electronic switch is to determine whether whether initial igniter work ignites electric detonator.Discharge current is to flow on the bridge silk of igniter head in the firing circuit in the electric detonator, utilizes the heating to the electric bridge silk to produce ignition exactly, and gunpowder ignites.
The following problem of electric detonator ubiquity of China's use at present, under some special occasions, can not reach the requirement of essential safety, such as having under the flammable explosive gas environment, all there be not good or ripe relating to the control of electric arc, electric spark and to element, equipment surface temperature controlling aspect.And if introducing a series of essential safety means on the basis of ordinary electronic detonator just can effectively address this is that, and practical, simple and convenient, promote easily.
China starts late to the research of essential safety technology and theoretical side, but development is very fast.Relevant essential safety Study on Theory is mainly concerned with the electrical discharge problem.The electric arc of intrinsicallysafecircuit, spark discharge belong to typical low energy discharge (the minimum ignition energy of regulation methane is 525uJ among the GB3836.4-2000, and the minimum ignition energy of hydrogen is 40uJ).
At present domestic and international researcher is for the research of intrinsicallysafecircuit, be primarily aimed at inductive circuit, and less to the research of capacitive circuit, reason has following several respects: one, contain inductive element in the practical intrinsicallysafe electrical apparatus, promptly inductive circuit is comparatively common more; Its two, the disconnection of inductive circuit discharge is big to the influence of circuit essential safety performance; Its three, it is believed that the discharging law of condenser network can be obtained by inductive circuit according to reciprocity.Because there is bigger electric capacity in the storage capacitor output, immediate current is very big and the duration is of short duration during capacitor discharge, and it has considerable influence to the essential safety of circuit, therefore is necessary the flash-over characteristic of capacitive circuit is further studied.
The intrinsic safety type circuit has the power supply restriction of following two aspects: 1. take measures to stop external interference such as electromagnetic interference, electrostatic interference, noise jamming etc. and be coupled in the electronic component by relay or photoelectric yield end; 2. limit the overvoltage and the overcurrent of storage capacitor discharge circuit.
Storage capacitor in intrinsic safety type electric detonator voltage when discharge reduces gradually, and electric current also is an impingement pulse, increases suddenly earlier to reduce gradually again.This is unallowed in the electric detonator internal circuit, because dash current generates heat on electronic component such as transistor easily, thereby the shell temperature of detonator is risen, and must be suppressed.Can cause electric detonator not detonate because of the mistake thermal breakdown is broken down circuit when serious, but even now, electric detonator can not detonate by mistake under we also will guarantee to nonserviceable, essential safety that Here it is.
Summary of the invention
The purpose of this utility model provides a kind of intrinsic safety type electric detonator detonation system, it adopts a series of essential safety means, by used the intrinsic safety type circuit limitations storage capacitor discharge voltage of electric detonator and electric current in the essential safety scope, can be because of dangerous mists that ignites such as element heating or electric arc electric sparks, can not hinder for some reason yet and make detonator generation mistake quick-fried, thereby improved the security of electronic detonator blasting, especially be fit to mining or explosion under the particular surroundings of flammable explosive gas is arranged.
For achieving the above object, the utility model is taked following design:
A kind of intrinsic safety type electric detonator detonation system, form by detonator initiator and one group of electric detonator body that ignited by its control, igniter head of each piece electric detonator is connected in the detonator ignition control circuit, and sends out control signal by one chip microcomputer and control the igniting action.The inside main circuit of electric detonator partly is the circuit with essential safety character, includes anti-jamming circuit, low-voltage direct translation and protection circuit, protective circuit of voltage regulation, surge protection circuit, isolation voltage stabilizing ignition control circuit, wherein:
Electric detonator is built-in with storage capacitor, between electric detonator storage capacitor and single chip machine controlling circuit, be added with surge protection circuit, the output of this surge protection circuit connects the input of single chip machine controlling circuit again through the level conversion unit circuit through the RS-485 chip, the input of surge protection circuit is connected with the output of storage capacitor;
Be added with low-voltage direct change-over circuit and protective circuit of voltage regulation between the electronic switch of electric detonator storage capacitor and detonator igniter head, the output of the input termination anti-jamming circuit of low-voltage direct change-over circuit is so that elimination electromagnetic interference and external disturbance etc.The input of the output termination protective circuit of voltage regulation of low-voltage direct change-over circuit is so that obtain more galvanic current pressure;
Between the electronic switch of electric detonator storage capacitor and detonator igniter head, be added with simultaneously and isolate the voltage stabilizing ignition control circuit; have the harmonic wave harmful during the storage capacitor discharge to electronic component; behind surge protection circuit elimination clutter, insert the input of detonator ignition control circuit.
The output of above-mentioned one chip microcomputer has increased the detonator signal line FIRE of control blasting cap detonation, the action of this holding wire control electronic switch.
In the circuit of electric detonator as herein described inside is the circuit with intrinsic safety character, includes storage capacitor circuit, anti-jamming circuit, low-voltage direct change-over circuit, surge protection circuit, isolation voltage stabilizing ignition control circuit.Wherein between the storage capacitor of electric detonator and single-chip microcomputer, to be added with surge protection circuit, the output of this surge protection circuit communicates through the serial line interface of MAX485 chip and single-chip microcomputer through level conversion unit again, and surge protection circuit is connected with the two ends of storage capacitor; Between the electronic switch of the storage capacitor of electric detonator and fuse lighter, be added with low-voltage direct change-over circuit and protective circuit of voltage regulation, after the storage capacitor discharge, through anti-jamming circuit, the input that connects the low-voltage direct change-over circuit, promptly can be the operating voltage that one chip microcomputer provides low-power consumption afterwards again behind protective circuit of voltage regulation, single-chip microcomputer is sent out the ignition control signal FIRE control electronic switch action of igniter; Be added with simultaneously between the electronic switch of electric detonator storage capacitor and fuse lighter and isolate the voltage stabilizing ignition control circuit, this circuit is made of voltage stabilizing element LM317 and optocoupler isolator spare.
Surge mainly refers to the strong pulse of the moment generation of storage capacitor discharge just, because circuit itself non-linear has the pulse that is higher than power supply itself, perhaps because the own or external spike interference that other parts are subjected in power supply or the circuit is called surge.It makes circuit the burning out in a flash of surge probably, punctures as PN junction electric capacity, and resistance blows or the like.So it is exactly in order to stop the generation of this type of phenomenon that the utility model adds surge protection circuit.
The utility model has the advantages that:
(1) the utility model utilizes RS-485 communication protocol, has increased multiple spot, two-way communications capabilities, has strong noise inhibition, wide common mode range, longer transmission distance, conflict protection etc. to the very favorable characteristic of networking.Allow a plurality of transmitters to be connected on same the bus, increased the driving force and the conflict protection feature of transmitter simultaneously, expanded the bus common mode range.The RS-485 bus adopts the form of balancing twisted-pair line, has reduced extraneous interference greatly, and 1219 meters of maximum transmission distances can satisfy the actual needs of explosion.
(2) the utility model utilizes surge protection circuit to come filtering harmful higher hamonic wave or pulse; thereby stop many bad reactions that clutter or harmonic wave cause (overvoltage that causes as series parallel resonance, overcurrent, mechanical resonant etc.; thereby cause harm such as overheated, insulation ag(e)ing, electronic component losses such as capacitor, transistor are increased in addition because of crossing thermal breakdown).
(3) add anti-jamming circuit effectively filtering noise interference, electrostatic interference and electromagnetic interference, and then access low-voltage direct conversion mu balanced circuit, the operating voltage 3.3V of low-power consumption is provided for single-chip microcomputer, reduced the current drain of digital circuit work, improved the global reliability of detonator work with storage capacitor;
(4) voltage stabilizing is isolated ignition control circuit and has been introduced effectively electromagnetic interference and the electrostatic interference in the filtering circuit of optocoupler isolator, the security that has improved electric detonator.The FIRE ignition control signal that single-chip microcomputer is drawn is controlled the break-make of electronic switch and then is controlled whole discharge circuit, has isolated the influence of static, has further promoted the safety in utilization of electric detonator.
(5) owing to have essential safety safeguard measure preferably, make that the application of this electric detonator is simple, safety, reliable, use occasion is more extensive, and use is safer.
Description of drawings
Fig. 1 is the utility model intrinsic safety type electric detonator way circuit control block diagram.
Fig. 2 is the utility model intrinsic safety type electric detonator way circuit schematic diagram
Fig. 3 is the utility model surge protection circuit figure.
Fig. 4 is the utility model anti-jamming circuit figure.
Fig. 5 is the utility model low-voltage direct translation and protection circuit diagram.
Fig. 6 is that the IGNITION CONTROL circuit diagram is isolated in the utility model voltage stabilizing.
The specific embodiment
The utility model intrinsic safety type electric detonator institute is improved to be part in the detonator, and initiator is still used existing type, and electric detonator group and initiator constitute initiation system jointly.Described one group of electric detonator is one piece at least, can be thousands of at most, or even tens thousand of are controlled by detonator initiator simultaneously.
Utility model point of the present utility model is and can be improved the Iganition control system in each electric detonator based on the characteristics of existing all kinds of electric detonators, by increase be provided with intrinsically safe circuit make electric detonator entire system performance more perfect, use safer.
As shown in Figure 1, the control system of the utility model intrinsic safety type electric detonator body is made up of storage capacitor circuit, single chip machine controlling circuit, anti-jamming circuit, low-voltage direct change-over circuit, surge protection circuit, isolation voltage stabilizing ignition control circuit etc.Wherein:
Between electric detonator storage capacitor and single chip machine controlling circuit, be added with surge protection circuit, the output of this surge protection circuit connects the serial line interface end of single chip machine controlling circuit again through the level conversion unit circuit through the RS-485 chip, the input of surge protection circuit is connected with the output of storage capacitor;
Between the electronic switch of electric detonator storage capacitor and fuse lighter, be added with low-voltage direct change-over circuit and protective circuit of voltage regulation, in the process of blasting cap initiation, provide stable low-voltage dc power supply to firing circuit.Be added with simultaneously in addition and isolate the voltage stabilizing ignition control circuit, the storage capacitor discharge is after behind the surge protection circuit, connect the input of ignition control circuit.
The intrinsic safety type electric detonator surge protection circuit mainly contains XTR106 (accurate voltage/current converter) and rectifier bridge is formed.Input at accurate voltage/current converter XTR106 is incorporated the rectification bridge circuit into, and pincers are defended two ends that diode D1 is added in the output of accurate voltage/current converter XTR106, and to make voltage be safety level.The Vin+ of accurate voltage/current converter XTR106 links to each other with the input of RS-485 bus with the Vin-end, and 1,3 ends of electricity group bridge are attempted by Vin+ and the Vin-end of accurate voltage/current converter XTR106.Two non-linear element electric capacity (C1 and C2) are attempted by the two ends of input voltage; The two Rg terminations of accurate voltage/current converter XTR106 are gone into certain value resistance (R5), and the drain electrode of FET (Q1) is connected on the output V+ end of accurate voltage/current converter XTR106; At V+ and Io termination output resistance R6 is arranged, shunt capacitance (C3) in parallel and diode (D1) at resistance R 6 two ends.
The voltage stabilizing buffer circuit of intrinsic safety type electric detonator is made of voltage stabilizing element LM317 and optocoupler isolator spare, is the firing circuit of tie point duration and degree of heating electronic switch after voltage stabilizing is isolated.
Fig. 2 to Fig. 6 is a specific embodiment of realizing technical solutions of the utility model.
Below in conjunction with embodiment the utility model is described in further details, should be considered as shown in the accompanying drawing exemplary, but not in order to limit patent protection scope of the present utility model.
Fig. 2 is the utility model intrinsic safety type electric detonator way circuit schematic diagram, is to be connected and composed by several formant circuit shown in Figure 1.
The utility model intrinsic safety type electric detonator core mainly is the minimum system that singlechip microprocessor is formed, and the initiator of external control intrinsic safety electric detonator is connected by the interior one chip microcomputer (selecting C8051F series for use) of RS-485 bus and detonator.The RS-485 bus adopts two wires (balancing twisted-pair line) mode, and two-wire system can realize real multiple spot two-way communication, and is the same with RS-422, and its maximum transmission distance is about 1219 meters, and peak transfer rate is 10Mb/s.The length and the transfer rate of balancing twisted-pair line are inversely proportional to, and below 100kb/s speed, just may use the longest cable length of regulation.Traditional communication based on the RS-232 agreement makes its application limit become increasingly conspicuous because transmission range is short, speed is slow, signal is subject to deficiencies such as interference.And RS-485 communication protocol has increased multiple spot, two-way communications capabilities, has strong noise inhibition, wide common mode range, longer transmission distance, conflict protection etc. to the very favorable characteristic of networking.Allow a plurality of transmitters to be connected on same the bus, increased the driving force and the conflict protection feature of transmitter simultaneously, expanded the bus common mode range.When single-chip microcomputer carries out 485 communications, must change level.Because between single-chip microcomputer and the peripheral hardware be the RS-485 network, monolithic pusher side signal is converted to the RS-485 level signal from Transistor-Transistor Logic level behind MAX485, therefore must convert the RS-485 signal to the RS-232 level signal again, and the two could correct communication.Adopt the DAC-8520 converter at native system, the RS-485 signal is converted to the RS-232 signal, this converter data transaction transmission speed is fast, and does not need the user that it is carried out initialization and parameter modification.
Anti-jamming circuit in the utility model circuit, low-voltage direct conversion protection mu balanced circuit; especially isolating mu balanced circuit all is protectiveness circuit of restriction impingement electric current and voltage, prevents electromagnetic interference, electrostatic interference; noise jamming etc., these all are means of essential safe type.So-called intrinsically safe circuit is realized by the energy of restriction electric spark and two possibilities of fuel factor ignition source.For general circuit, safe spark parameter depends primarily on voltage (U), electric current (I), inductance (L), electric capacity (C) etc., the electric capacity that electric spark is played a major role, the energy of inductive circuit suppress and to fuel factor, the braking measure that is the surface temperature of element, lead, outer metal housing had both become intrinsically safe circuit key to the issue to be solved, and electric current in the circuit and voltage are the keys in the key.So general thought of the present utility model is to guarantee the small voltage low current by a series of circuit and measure.
Therefore, when carrying out circuit design, should require the choose reasonable design according to the characteristics and the design performance of circuit:
(1) control of maximum surface temperature (as the shell temperature): during the design intrinsically safe circuit, must guarantee no matter its each several part element and lead are under normal condition or the malfunction, and its maximum surface temperature can not be greater than the temperature that temperature class allowed under its service condition.So can adopt following measures to reduce fuel factor in order to control maximum surface temperature, thereby guarantee that damp avoids because of touching the blast that the hot surface that is higher than its natural temperature may cause.
(2) to the selection of equipment inside conductor: will consider the heating temp of lead self during design, that is to say needs to consider that the lead maximum allows the electric current that passes through.Maximum allowed current according to lead is selected suitable with it wire diameter, also must consider the minimum feature in the printed board simultaneously.
If communication bus RS-485 distance; usually voltage deviation can take place; contain harmful harmonic wave in the level voltage; must remove; because if having clutter or harmonic wave can cause many bad reactions in the output voltage; the overvoltage that causes as series parallel resonance, overcurrent, mechanical resonant etc., thus harm such as overheated, insulation ag(e)ing caused, electronic component losses such as capacitor, transistor are increased even because of crossing thermal breakdown.And surge protection utilizes the holding circuit of non-linear element to the responsive design of high frequency (surge) exactly, and simple and commonly used is sized capacitors in parallel or series inductance etc.
Fig. 3 is the circuit diagram of surge protection unit, and the two ends of RS-485 connect Vin+ and the Vin-end of accurate voltage/current converter XTR106 (accurate voltage/current converter) respectively, and electricity group bridge is attempted by the two ends of accurate voltage/current converter XTR106.Non-linear element capacitor C 1 and C2 are the devices to surge pulse sensitivity, and another effect is also to can be used as shunt capacitance to reduce or eliminate external interference, and they are attempted by the two ends of input voltage.The two Rg terminations of accurate voltage/current converter XTR106 are gone into fixed value resistance R5, and the drain electrode of FET Q1 is connected on the output V+ end of accurate voltage/current converter XTR106.Make FET Q1 have time enough to be operated in the key that the variable resistor district is this surge protection circuit design before the conducting fully.For making control signal become high-frequency oscillation signal, obtain one by the low voltage V+ that uprises slow rising, the shunt capacitance C3 in parallel at output resistance R6 two ends, when signal was high level, R6 two ends resistance was almost nil, when signal is low level, capacitor C 3 chargings, V+ rises gradually, finishes until charging, and this moment, V+ raise gradually.The size that changes C3 can change the speed that V+ rises, and also just changed the time that FET is operated in the variable resistor district, and this measure can effectively reduce surge current.Utilize diode D1 to limit surge voltage in this circuit, simultaneously, it is safety level that pincers are defended the voltage that is added in accurate voltage/current converter XTR106, and the rectification bridge circuit that utilizes four diodes compositions is in order to prevent backward voltage.
As shown in Figure 4, anti-jamming circuit mainly act on be reduce or eliminate noise jamming, circuit or human body in the circuit with electrostatic interference and extraneous electromagnetic interference etc.Capacitor C 1 is the interference voltage of filtering input voltage, and C2 is the thermal noise voltage of filtering resistance R 5 and the interference voltage of input voltage.The effect of diode VD1 be pincers defend triode VT1 base voltage in low level, C3, C4 and R6 are decoupling circuit, the influence between the front and back utmost point of isolation voltage prevents the low frequency self-excitation.The MCS special chip effectively reduces electromagnetic interference; VD2, VD3 are dual backward dioded; shield; R9 is the base pull-up resistor of triode VT3; can adjust the base potential of VT3 by R7, R9; make it have suitable duty, D2 is a voltage-stabiliser tube, keeps the base stage of VT3 and the voltage between emitter stage stable.
Low-voltage direct switch voltage-stabilizing circuit such as Fig. 5 show that it mainly is made up of overtemperature protection, overcurrent protection and three parts of mu balanced circuit.
Overheating protection circuit is made up of R1, R2, VT1, VT2, VT3 etc.Because diffusion resistance has positive temperature coefficient, and voltage U between transistor base and emitter stage
BEHave negative temperature coefficient, in case component temperature raises, R1 and R2 resistance increase, and its voltage also increases, VT1 conducting, voltage U
BE1Descend, the VT1 electric current increases, I
C1Electric current flows through and makes its voltage rising very fast, simultaneously U
BE2And U
BE3Then raise and descend with temperature.Therefore, by VT2 conducting (VT2 ends under the normal condition).The base stage of VT3 is just directly controlled in the VT2 conducting, the base current of VT3 is reduced, thereby reach the purpose of overtemperature protection.
Overcurrent protection mainly is made up of VT4, VT5, R4, R6, R7, R9 etc.VT5 and VT6 are in cut-off state under the normal condition, in case when output current increases, will increase by the voltage of R9, make the VT5 conducting, and the electric current that will inject VT7 shunts through R4, force output current decline.Because the voltage on the R4 increases VT4 also with conducting, shunt the collector current of VT2 again simultaneously, output current is descended, thereby reached the purpose of overcurrent protection.
Mu balanced circuit mainly is made up of VT8, VT9, R12, R13, R14, R16, R17 etc.If do not meet R14, when input adds unsettled input voltage Ui, do not have path, so transistor VT8 is in cut-off state owing to adjust pipe VT8 base stage stream, entire circuit is not worked.R14 plays start-up circuit.If insert resistance R 14, when circuit had unstable input voltage, its job order was as follows:
Input voltage Ui anode, on the one hand electric current flow to the negative terminal of Ui by R12, R14, on the other hand by the emitter-base bandgap grading of VT8 through R14, flow to the negative terminal of Ui, and produce base current I
B8With collector current I
C8The two ends of sample resistance R16 and R17 are output voltage, and triode VT9 has base current I
B9, collector current I
C9Produce.Can draw relational expression I thus
R13+ I
B8=I
C9+ I
R14
I wherein
C9Controlled by output voltage U o, work as I
C9When reducing, I
B8Also reduce, work as I
C9During increase, I
B8Also increase, i.e. I
C9Can control I
B8Remove to control Uo again, to reach the purpose of voltage stabilizing.When output voltage is unstable, following adjustment process will take place: reduce as if output voltage, then U
B9And U
E9All reduce, and latter's variable quantity is greater than the former, because the dynamic electric resistor of voltage-stabiliser tube VD1 is little.U
BE9Increase base current I
B9Increase, so colelctor electrode I
C9Become big, make I again
B8Become big, base stage I
B8Variation cause colelctor electrode I again
C9Become big, finally cause output voltage U o to raise again, therefore can make output keep stable.
When the output voltage short circuit, amplifier tube and reference circuit exceed working range, and VT9 ends, thereby VT8 is ended, and resistance R 12 just can realize the function of overload protection.For example, to positive voltage of E8 point, as long as the current potential height that the current potential of E8 is ordered than B2, VT9 just ends input voltage by R12, and the resistance of adjustment R12 just can be controlled the protection value of overload.
Three ends output adjustable voltage stabilizer LM117, the adjusting output voltage is 3.3V, makes single-chip microcomputer be operated in the low-power consumption working method to reduce the power consumption of circuit.
Voltage stabilizing buffer circuit (referring to Fig. 6) is the pith in the intrinsically safe circuit, and effect is that current/voltage is limited in certain little scope, but can also make igniter energy ignition operation.Capacitor C 1 is attempted by the two ends of input voltage, C1 one termination signal ground, and the other end connects diode D1, and D1 can play the effect of buffer voltagc.C1 can reduce or eliminate outside interference as the shunt capacitance that inserts mu balanced circuit in the circuit, and D1 is attempted by the two ends of three terminal regulator LM317, suitably increases and reduces electric capacity two ends dangerous voltage when capacitor C 2 internal resistances can make storage capacitor release energy.Allow capacitor C 2 so just limit discharge energy, can prevent to discharge overvoltage by discharging behind the current-limiting resistance R2.In the ground connection termination capacitor C 3 of three terminal regulator, and make another termination signal ground of C3.The base earth of the triode of photoelectrical coupler, colelctor electrode are connected and fixed resistance R 3 and rheostat R4.Load RL and electronic switch igniter connect into a loop, are carved at a time by programme controlled timer and send FIRE pulse enable signal electronic switch closes and promptly constitute the loop, and storage capacitor releases energy, igniter igniting blasting electric detonator.
The output voltage of three terminal regulator output adjustable voltage stabilizer is at 1.2V～37V, and output current is at 10mA-500mA.R1 and variable resistor Rp form output adjustable resistance network among the figure, and bias current is absorbed with the leakage current of adjusting pipe in the circuit in order to make, and setting R1 is 120～240 Ω, and the electric current of releasing by R1 is 5～10mA.The effect of input capacitance C1 is to be used to suppress ripple voltage, when C1 is 10 μ F, can improve ripple rejection ratio 15db, and output capacitance C3 is used for shock absorbing, and the shock absorbing electric current guarantees that circuit working is stable.Because external output capacitance C2, easily capacitor discharge takes place and damage voltage-stablizer, then need be connected to protection diode VD1; when C2 discharges; VD1 conducting pincers are defended, and voltage-stablizer is protected, and VD2 is the protection diode when damaging voltage-stablizer when preventing and treating adjustable side shunt capacitance C3 discharge.Use optocoupler isolator spare can effectively suppress before and after the influencing each other of circuit, the especially heating of igniter head electric bridge silk, and can effectively suppress the generation of static, static is danger close in detonator.
Discharge current is to flow on the bridge silk of electric detonator in the firing circuit, utilizes the heating to the bridge silk to produce ignition exactly, and gunpowder ignites.But in actual applications, must note the influence of static, because the static of moment can produce several kilovolts to tens kilovolts super-pressure, make the rapid heating of bridge silk and light gunpowder, thereby cause the mistake blast of electric detonator.So under payment to a porter-housing discharge type, the electrostatic potential that forms between payment to a porter and housing may puncture the air-gap between payment to a porter and match board head and shell and discharge.After being coated with outside the igniting head with conductive paint, formed certain electrostatic leakage passage between payment to a porter and igniting head and housing, when the electrostatic potential between payment to a porter and housing was not too high, static was released by conductive paint.When only between payment to a porter and housing, forming suddenly very high electrostatic potential and conductive paint and being not enough to release static immediately. could puncture the air-gap that payment to a porter and igniting head and housing are asked, formation electrostatic spark and then may cause detonator and miss quick-fried.So the match board head parts are coated with the antistatic effect that can improve detonator with conductive paint to a certain extent.
The utility model not only has above-mentioned safety measure, has also increased the detonator signal FIRE of Single-chip Controlling blasting cap detonation in control circuit, and this holding wire connects electronic switch.Electronic switch is made up of the electronic component of classes such as triode, and triode ends under the normal condition, makes its conducting when FIRE sends high level, and at this moment, discharge circuit is connected, and firing circuit is started working, and then adds heat bridge silk detonating primer.And circuit disconnects before FI RE sends high level, even there is high-pressure electrostatic also can not pass to the first side of igniting, so the utility model has improved the security of electronic detonator blasting greatly.
Claims (8)
1, a kind of intrinsic safety type electric detonator detonation system is made up of detonator initiator and one group of electric detonator body that ignited by its control, and igniter head of each piece electric detonator is connected the control output end of detonator ignition control circuit; It is characterized in that:
The inside main circuit of electric detonator is the circuit with essential safety character, includes anti-jamming circuit, low-voltage direct translation and protection circuit, protective circuit of voltage regulation, surge protection circuit, isolation voltage stabilizing ignition control circuit, wherein
Between electric detonator storage capacitor and single chip machine controlling circuit, be added with surge protection circuit, the output of this surge protection circuit connects the input of single chip machine controlling circuit again through the level conversion unit circuit through the RS-485 chip, the input of surge protection circuit is connected with the output of storage capacitor;
Between the electronic switch of electric detonator storage capacitor and fuse lighter, be added with low-voltage direct change-over circuit and protective circuit of voltage regulation, the output of the input termination anti-jamming circuit of low-voltage direct change-over circuit, the input of its output termination protective circuit of voltage regulation;
Be added with simultaneously between the electronic switch of electric detonator storage capacitor and fuse lighter and isolate the voltage stabilizing ignition control circuit, the storage capacitor discharge is after behind the surge protection circuit, connect the input of ignition control circuit.
2, intrinsic safety type electric detonator detonation system according to claim 1 is characterized in that: the output of one chip microcomputer adds the detonator signal line FIRE of control blasting cap detonation, and this holding wire connects electronic switch.
3, intrinsic safety type electric detonator detonation system according to claim 1, it is characterized in that: described surge protection circuit comprises one accurate voltage/current converter XTR106, its Vin+ links to each other with the input of RS-485 bus with the Vin-end, 1,3 ends of electricity group bridge are attempted by Vin+ and the Vin-end of XTR106, and two non-linear element electric capacity (C1 and C2) are attempted by the two ends of input voltage; Two Rg terminations of accurate voltage/current converter XTR106 are gone into certain value resistance (R5), and the drain electrode of FET (Q1) is connected on the output V+ end of accurate voltage/current converter XTR106; At V+ and Io termination output resistance R6 is arranged, again shunt capacitance (C3) in parallel and diode (D1) at resistance (R6) two ends.
4, intrinsic safety type electric detonator detonation system according to claim 3, it is characterized in that: the input at accurate voltage/current converter XTR106 is incorporated the rectification bridge circuit into, and pincers are defended the two ends that diode (D1) is added in accurate voltage/current converter XTR106 output.
5, intrinsic safety type electric detonator detonation system according to claim 1 is characterized in that: the one chip microcomputer in described RS-485 bus and the electric detonator is connected, adopts the communication of RS-485 communication protocol, and RS-485 bus employing balancing twisted-pair line mode is transmitted.
6, intrinsic safety type electric detonator detonation system according to claim 1 is characterized in that: described low-voltage direct translation and protection mu balanced circuit comprises overtemperature protection, overcurrent protection and three element circuits of mu balanced circuit.
7, intrinsic safety type electric detonator detonation system according to claim 1 is characterized in that: described isolation voltage stabilizing ignition control circuit is made of voltage stabilizing element LM317 and optocoupler isolator spare.
8, intrinsic safety type electric detonator detonation system according to claim 1 is characterized in that: described anti-jamming circuit is made up of triode cascode polar circuit, and described low-voltage direct translation and protection mu balanced circuit is made up of DC voltage-stabilizing element LM117.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201241611U CN201311251Y (en) | 2008-11-26 | 2008-11-26 | Intrinsic safety type initiating system of electronic detonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201241611U CN201311251Y (en) | 2008-11-26 | 2008-11-26 | Intrinsic safety type initiating system of electronic detonator |
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| Publication Number | Publication Date |
|---|---|
| CN201311251Y true CN201311251Y (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201241611U Expired - Lifetime CN201311251Y (en) | 2008-11-26 | 2008-11-26 | Intrinsic safety type initiating system of electronic detonator |
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| CN (1) | CN201311251Y (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102278924A (en) * | 2010-06-11 | 2011-12-14 | 南京理工大学 | Intelligent detonation control system and method |
| CN101408397B (en) * | 2008-11-26 | 2013-03-27 | 北京维深数码科技有限公司 | Intrinsic safety type electric detonator detonation system |
| CN103411486A (en) * | 2013-08-21 | 2013-11-27 | 南通迅翔自动化设备有限公司 | AC/DC (alternative current/direct current) withstand voltage protective device of digital electronic detonator |
| CN103424042A (en) * | 2013-08-21 | 2013-12-04 | 南通迅翔自动化设备有限公司 | Remote control system for electronic detonator |
| CN104132595A (en) * | 2014-07-24 | 2014-11-05 | 山东隆泰矿业设备有限公司 | Intrinsic-safety circuit isolation type mine exploder |
| CN107101540A (en) * | 2017-06-29 | 2017-08-29 | 中国工程物理研究院电子工程研究所 | A kind of multi-point sequent detonation in-line arrangement dispenser fuze |
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- 2008-11-26 CN CNU2008201241611U patent/CN201311251Y/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101408397B (en) * | 2008-11-26 | 2013-03-27 | 北京维深数码科技有限公司 | Intrinsic safety type electric detonator detonation system |
| CN102278924A (en) * | 2010-06-11 | 2011-12-14 | 南京理工大学 | Intelligent detonation control system and method |
| CN102278924B (en) * | 2010-06-11 | 2013-08-07 | 南京理工大学 | Intelligent detonation control system and method |
| CN103411486A (en) * | 2013-08-21 | 2013-11-27 | 南通迅翔自动化设备有限公司 | AC/DC (alternative current/direct current) withstand voltage protective device of digital electronic detonator |
| CN103424042A (en) * | 2013-08-21 | 2013-12-04 | 南通迅翔自动化设备有限公司 | Remote control system for electronic detonator |
| CN104132595A (en) * | 2014-07-24 | 2014-11-05 | 山东隆泰矿业设备有限公司 | Intrinsic-safety circuit isolation type mine exploder |
| CN104132595B (en) * | 2014-07-24 | 2016-05-18 | 山东隆泰安防科技有限公司 | The isolated mining exploder of intrinsically safe circuit |
| CN107101540A (en) * | 2017-06-29 | 2017-08-29 | 中国工程物理研究院电子工程研究所 | A kind of multi-point sequent detonation in-line arrangement dispenser fuze |
| CN107101540B (en) * | 2017-06-29 | 2023-10-03 | 中国工程物理研究院电子工程研究所 | Multi-point sequential detonation in-line type female bullet fuze |
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