CN216245885U - Anti-interference control circuit of digital electronic detonator - Google Patents
Anti-interference control circuit of digital electronic detonator Download PDFInfo
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- CN216245885U CN216245885U CN202122922772.9U CN202122922772U CN216245885U CN 216245885 U CN216245885 U CN 216245885U CN 202122922772 U CN202122922772 U CN 202122922772U CN 216245885 U CN216245885 U CN 216245885U
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- control chip
- electrolytic capacitor
- electronic detonator
- diode
- current
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- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 238000002955 isolation Methods 0.000 claims abstract description 13
- 238000010992 reflux Methods 0.000 claims abstract description 4
- 238000005422 blasting Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 description 6
- 238000005474 detonation Methods 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model discloses an anti-interference control circuit of a digital electronic detonator. When the small-section blasting is carried out, the electromagnetic interference easily causes the electronic detonator blind blasting phenomenon. The power output end of the rectifier bridge is connected with the power supply end of the control chip through the isolation protection circuit, the reflux end is connected with the reference ground pin of the control chip and the negative electrode of the electrolytic capacitor, the emitting electrode of the PNP triode is connected with the charging pin of the control chip, the collecting electrode is connected with the positive electrode of the electrolytic capacitor and one end of the ignition bridge wire, the base electrode is connected with the negative electrode of the electrolytic capacitor through the current limiting resistor, the other end of the ignition bridge wire is connected with the ignition switch of the control chip, and the two input ends of the rectifier bridge are respectively connected with the two pin wires of the electronic detonator. The method is simple in implementation mode, safe and reliable, effectively protects the electrolytic capacitor, and avoids the phenomenon of blind blasting.
Description
Technical Field
The utility model belongs to the technical field of electronic detonators, and relates to an anti-interference control circuit of a digital electronic detonator.
Background
Compared with a non-electric detonator, the electronic detonator has the functions of more accurate control of detonation delay time, control of detonation energy, safety control and the like, and is widely applied. Because the electronic detonator relates to blasting operation, the safety requirement of the electronic detonator is high. The electronic detonator is required to be free from being detonated by mistake under electromagnetic interference and misoperation in a complex environment. Particularly, when the small-section blasting is carried out, the induced voltage and the induced current of the electronic detonator easily cause the false triggering and the misfire of the electronic detonator.
Compared with the traditional detonating tube, the digital electronic detonator has accurate time delay control, high safety and wider application; however, in some complex environments, such as sections with diameters smaller than 2m, wading surfaces and the like, the defect of high probability of blind shots is particularly obvious. The basic reason is that when the digital electronic detonators are networked, due to different initiation delays arranged in the digital electronic detonators, strong electromagnetic wave interference signals can be generated under the comprehensive action of the digital electronic detonators, explosives and the like which are firstly blasted, the frequency can reach 100MHz, and the voltage peak value can reach over 10 KV. The interference signal is led into the digital electronic detonator control module from two leg wires of the unexploded digital electronic detonator to form strong negative pressure impact, a semiconductor tube in the digital electronic detonator control module is instantaneously punctured, so that the load is increased, the capacitor generates strong current to discharge, the capacitor is insufficient in electric quantity, the digital electronic detonator control module stops working, and a blind shot occurs; or for other reasons, induced voltage, induced current, surge current and the like are generated at the input end of the digital electronic detonator pin wire, a semiconductor tube in the internal control module can be instantaneously punctured, the load is increased, the capacitor generates strong current to discharge, and finally, a blind shot occurs due to insufficient electric quantity of the capacitor.
In the prior art, protection is added at the input stage of a control chip of a digital electronic detonator, common mode and differential mode suppression is added, or a point discharge device is added, but the frequency band suppression range of interference signals is limited, and the phenomenon of explosion rejection still occurs in a worse blasting environment.
Disclosure of Invention
The utility model aims to provide an anti-interference control circuit of a digital electronic detonator, aiming at solving the problems of the existing electronic detonator.
The utility model comprises the following steps: the device comprises a rectifier bridge, a control chip U, an isolation protection circuit G, an electrolytic capacitor C, an ignition bridge wire Rw, a PNP triode Q and a current-limiting resistor R.
The rectifier bridge comprises four diodes, a first diode D1Cathode of and a second diode D2The anode of the electronic detonator is connected with a pin wire P of the electronic detonator; third diode D3Anode of and a fourth diode D4The cathode of the electronic detonator is connected with the other pin wire N of the electronic detonator; second diode D2Cathode of and a third diode D3The cathode of the rectifier is connected with a power supply output end serving as a rectifier bridge and is connected with a power supply end Vcc of a control chip U through an isolation protection circuit G; first diode D1Anode of and a fourth diode D4The anode of the rectifier is connected with a reflux end serving as a rectifier bridge and is connected with a reference ground pin Vss of a control chip U, the cathode of an electrolytic capacitor C and one end of a current-limiting resistor R; the emitter of the PNP triode Q is connected with a charging pin HVout of the control chip U, the collector is connected with the anode of the electrolytic capacitor C and one end of an ignition bridge wire Rw, the base is connected with the other end of the current-limiting resistor R, and the other end of the ignition bridge wire Rw is connected with an ignition switch g of the control chip U.
When other electronic detonators are detonated, the explosive explosion causes electromagnetic interference to generate current pulse, current pulse is induced on a pin wire of the electronic detonators after the detonation, the current pulse enters a control chip U from the pin wire P/N, even if the current pulse breaks through a semiconductor tube inside the control chip U, the total consumed current I of an electrolytic capacitor CceThe reverse amplification factor alpha of the PNP triode Q is related to the current which is extracted by the control chip U from the electrolytic capacitor C, and the electrolytic capacitor C realizes the normal power supply of the control chip U and the isolation protection circuit G. The method has simple implementation mode, is safe and reliable, fully utilizes the working characteristics of the triode, effectively realizes the protection of the electrolytic capacitor, and avoids insufficient electric quantity of the capacitor caused by interference in the actual blasting processResulting in the appearance of blind shots.
Drawings
FIG. 1 is a schematic view of the present invention.
Detailed Description
The utility model is further described below with reference to the figures and examples.
As shown in fig. 1, the control circuit of the anti-interference digital electronic detonator comprises a rectifier bridge, a control chip U, an isolation protection circuit G, an electrolytic capacitor C and an ignition bridge wire Rw. The bridge comprises four diodes, a first diode D1Cathode of and a second diode D2The anode of the electronic detonator is connected with a pin wire P of the electronic detonator; third diode D3Anode of and a fourth diode D4The cathode of the electronic detonator is connected with the other pin wire N of the electronic detonator; second diode D2Cathode of and a third diode D3The cathode of the rectifier is connected with a power supply output end serving as a rectifier bridge and is connected with a power supply end Vcc of a control chip U through an isolation protection circuit G; first diode D1Anode of and a fourth diode D4The anode of the rectifier is connected with a reflux end serving as a rectifier bridge and is connected with a reference ground pin Vss of a control chip U and the cathode of an electrolytic capacitor C; the anode of the electrolytic capacitor C and one end of the ignition bridge wire Rw are connected with a charging pin HVout of the control chip U, and the other end of the ignition bridge wire Rw is connected with an ignition switch g of the control chip U. The control circuit of the existing digital electronic detonator is provided above.
The detonator sends a detonation command, the detonation command is sent to a control chip U of the digital electronic detonator in a carrier wave mode through a rectifier bridge, the electrolytic capacitor C starts to supply power to the isolation protection circuit G and the control chip U, after the delay time set inside the control chip U is reached, the control chip U opens an ignition switch G, and the electrolytic capacitor C discharges through an ignition bridge wire Rw to detonate the electronic detonator.
When other electronic detonators are detonated, the explosive explosion causes electromagnetic interference to generate current pulses, then the current pulses are induced on pin wires of the electronic detonators, the current pulses enter the control chip U from the pin wires P/N, if a semiconductor tube in the control chip U is punctured, the current of the electrolytic capacitor C extracted by the control chip U is increased instantly, the electrolytic capacitor C is caused to discharge strongly, the voltage at two ends of the electrolytic capacitor C is reduced to 0 rapidly, the electrolytic capacitor C cannot supply power to the control chip U and the isolation protection circuit G continuously, the control chip U stops working, and the digital electronic detonators cannot detonate.
As shown in a dotted line frame in figure 1, the PNP triode Q is arranged between the anode of the electrolytic capacitor C and the charging pin HVout of the control chip U, the emitter of the PNP triode Q is connected with the charging pin HVout of the control chip U, the collector of the PNP triode Q is connected with the anode of the electrolytic capacitor C, and the base of the PNP triode Q is connected with the reference ground plane pin Vss of the control chip U and the cathode of the electrolytic capacitor C through the current limiting resistor R. The current of the electrolytic capacitor C is stabilized to flow out through the PNP triode Q, and the current limiting resistor R is used for adjusting the current of the base electrode of the PNP triode Q.
The detonator is communicated with and supplies power to the digital electronic detonator through the pin wire P/N, the control chip U receives a charging control instruction sent by the detonator, and the electrolytic capacitor C is charged through the PNP triode Q to reach the set charging voltage Vc. During charging, charging current Icc＝(Vcand/R) x beta, wherein beta is the positive amplification coefficient of the PNP triode Q and gradually decreases along with the gradual increase of the voltage at the two ends of the electrolytic capacitor C.
After the control chip U receives a detonation instruction sent by the detonator, the detonator stops supplying power, the electrolytic capacitor C supplies power to the control chip U and the isolation protection circuit G, and the power supply current Ieu＝(Vi/R)×α，ViThe voltage at two ends of the electrolytic capacitor C is gradually reduced along with the discharge, alpha is the reverse amplification coefficient of the PNP triode Q along with ViGradually decreases and gradually increases, thereby keeping IeuAnd (4) stabilizing. Total current I consumed by electrolytic capacitor Cce＝(Vi/R)×(α+1)。
When the current pulse enters the control chip U, even if the current pulse breaks down the semiconductor tube in the control chip U, the total consumed current I of the electrolytic capacitor CceThe reverse amplification factor alpha of the PNP triode Q is related to the current which is extracted by the control chip U from the electrolytic capacitor C, and the electrolytic capacitor C realizes the normal power supply of the control chip U and the isolation protection circuit G.
The positive amplification factor beta and the reverse amplification factor alpha of the PNP triode Q and the resistance value of the current limiting resistor R are set, so that the requirement that the electrolytic capacitor C is rapidly charged by the detonator and can provide enough total consumed current is met. The method comprises the following steps:
setting the range of the base current of the PNP triode Q according to the discharge curve of the electrolytic capacitor C and the maximum delay requirement of the digital electronic detonator
To obtain
VcCharging voltage set for the initiator, IbmaxThe maximum base current of the PNP triode Q is the sum of the normal working current required by the control chip U and the isolation protection circuit G.
And determining the adopted PNP triode Q according to the alpha and the beta.
Claims (1)
1. An anti-interference control circuit of a digital electronic detonator is characterized by comprising: the device comprises a rectifier bridge, a control chip U, an isolation protection circuit G, an electrolytic capacitor C, an ignition bridge wire Rw, a PNP triode Q and a current-limiting resistor R;
the rectifier bridge comprises four diodes, a first diode D1Cathode of and a second diode D2The anode of the electronic detonator is connected with a pin wire P of the electronic detonator; third diode D3Anode of and a fourth diode D4The cathode of the electronic detonator is connected with the other pin wire N of the electronic detonator; second diode D2Cathode and third diodeD3The cathode of the rectifier is connected with a power supply output end serving as a rectifier bridge and is connected with a power supply end Vcc of a control chip U through an isolation protection circuit G; first diode D1Anode of and a fourth diode D4The anode of the rectifier is connected with a reflux end serving as a rectifier bridge and is connected with a reference ground pin Vss of a control chip U, the cathode of an electrolytic capacitor C and one end of a current-limiting resistor R; the emitter of the PNP triode Q is connected with a charging pin HVout of the control chip U, the collector is connected with the anode of the electrolytic capacitor C and one end of an ignition bridge wire Rw, the base is connected with the other end of the current-limiting resistor R, and the other end of the ignition bridge wire Rw is connected with an ignition switch g of the control chip U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122922772.9U CN216245885U (en) | 2021-11-25 | 2021-11-25 | Anti-interference control circuit of digital electronic detonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122922772.9U CN216245885U (en) | 2021-11-25 | 2021-11-25 | Anti-interference control circuit of digital electronic detonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216245885U true CN216245885U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122922772.9U Active CN216245885U (en) | 2021-11-25 | 2021-11-25 | Anti-interference control circuit of digital electronic detonator |
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| Country | Link |
|---|---|
| CN (1) | CN216245885U (en) |
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2021
- 2021-11-25 CN CN202122922772.9U patent/CN216245885U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 310012 5-6 / F, block a, East Software Park Innovation Building, 90 Wensan Road, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Guoxin Microelectronics Co.,Ltd. Country or region after: China Address before: 310012 5-6 / F, block a, East Software Park Innovation Building, 90 Wensan Road, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU NATIONALCHIP SCIENCE & TECHNOLOGY Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |