CN111238326A - Electronic detonator communication circuit and electronic detonator - Google Patents
Electronic detonator communication circuit and electronic detonator Download PDFInfo
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- CN111238326A CN111238326A CN202010054585.0A CN202010054585A CN111238326A CN 111238326 A CN111238326 A CN 111238326A CN 202010054585 A CN202010054585 A CN 202010054585A CN 111238326 A CN111238326 A CN 111238326A
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- electronic detonator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/12—Primers; Detonators electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/042—Logic explosive circuits, e.g. with explosive diodes
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Abstract
The invention discloses an electronic detonator communication circuit and an electronic detonator, and relates to the technical field of electronic detonators. The invention can resist differential mode interference and reduce explosion rejection.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of electronic detonators, in particular to an electronic detonator communication circuit and an electronic detonator.
[ background of the invention ]
With the continuous development and improvement of the electronic detonator technology, the technical superiority of the electronic detonator is more and more widely accepted in the global blasting world. At present, the communication between the electronic detonator and the electronic detonator exploder adopts a bus parallel connection mode, and the purpose of transmitting control instructions and data is achieved by identifying bus communication voltage waveforms. In an actual blasting field use environment, such as a tunnel and various metal mine operation environments, differential mode interference and common mode interference are easily generated on a communication bus due to the fact that various mechanical equipment and strong magnetic signal interference exist in the field. Common mode interference refers to signals with different currents but the same phase; differential mode interference refers to signals with equal current and opposite phases. The reverse superposition effect of the differential mode interference can bring great influence to communication signals, especially in the delayed networking detonation process, detonators detonated in the earlier stage can generate strong differential mode interference signals, when the signals are transmitted to electronic detonators detonated in the later stage through a networking bus, high superposition voltage can be generated, even a front-end communication conversion circuit of the electronic detonators can be damaged, the signals are directly transmitted to pins of chips of the electronic detonators, the high voltage generated instantly can seriously interfere the work of the chips, the work of the chips of the electronic detonators is abnormal or reset, the chips of the electronic detonators can be broken down and damaged in serious conditions, the electronic detonators are directly rejected or scrapped, and unnecessary loss is brought to blasting.
[ summary of the invention ]
To solve the foregoing problems, the present invention provides an electronic detonator communication circuit to resist differential mode interference.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an electronic detonator communication circuit, includes communication bus, rectifier circuit and chip, the communication bus is connected the input of rectifier circuit, the chip connect in rectifier circuit's output, electronic detonator communication circuit still includes differential mode suppression circuit, differential mode suppression circuit includes switching tube component and voltage protection component, voltage protection component one end is connected the communication bus, the other end ground connection, switching tube component has signal control end, signal control end with the one end of voltage protection component ground connection is connected, when taking place differential mode interference, voltage protection component passes through the signal control end makes switching tube component switches on, makes the communication bus pass through switching tube component ground connection.
Optionally, the switching tube element is an NPN type triode, a base of the NPN type triode is a signal control end, a collector of the NPN type triode is connected to the communication bus, and an emitter of the NPN type triode is grounded.
Optionally, the switching tube element is an NMOS tube, a gate of the NMOS tube is a signal control end, a drain of the NMOS tube is connected to the communication bus, and a source of the NMOS tube is grounded.
Optionally, the switch tube element is a PNP type triode, the differential mode suppression circuit further includes a first conversion element, a base of the PNP type triode is a signal control end, the base of the PNP type triode is connected with one end of the voltage protection element, which is grounded, through the first conversion element, a collector is connected with the communication bus, and an emitter is grounded.
Optionally, the first conversion element is an NPN type triode for converting a high level of the voltage protection element into a low level when differential mode interference occurs, a base of the NPN type triode is connected to one end of the voltage protection element, which is grounded, a collector of the NPN type triode is connected to the communication bus through a resistor, an emitter of the NPN type triode is grounded, and a collector of the NPN type triode is connected to the signal control end.
Optionally, the first conversion element is an NMOS transistor, and is configured to convert a high level of the voltage protection element into a low level when differential mode interference occurs, a gate of the NMOS transistor is connected to a grounded end of the voltage protection element, a drain of the NMOS transistor is connected to the communication bus through a resistor, a source of the NMOS transistor is grounded, and a drain of the NMOS transistor is connected to the signal control end.
Optionally, the switching tube element is a PMOS tube, the differential mode suppression circuit further includes a second conversion element, a gate of the PMOS tube is a signal control end, the gate of the PMOS tube is connected to the grounded end of the voltage protection element through the second conversion element, a drain of the PMOS tube is connected to the communication bus, and a source of the PMOS tube is grounded.
Optionally, the second conversion element is an NPN type triode for converting a high level of the voltage protection element into a low level when differential mode interference occurs, a base of the NPN type triode is connected to one end of the voltage protection element, which is grounded, a collector of the NPN type triode is connected to the communication bus through a resistor, an emitter of the NPN type triode is grounded, and a collector of the NPN type triode is connected to the signal control end.
Optionally, the second conversion element is an NMOS transistor, and is configured to convert a high level of the voltage protection element into a low level when differential mode interference occurs, a gate of the NMOS transistor is connected to a grounded end of the voltage protection element, a drain of the NMOS transistor is connected to the communication bus through a resistor, a source of the NMOS transistor is grounded, and a drain of the NMOS transistor is connected to the signal control end.
Optionally, the voltage protection element is a transient voltage suppression diode, a voltage dependent resistor or a gas discharge tube.
The invention has the following beneficial effects:
according to the technical scheme provided by the invention, the interference problem of the differential mode signal is solved by adding a hardware circuit in the internal circuit of the electronic detonator to inhibit the differential mode signal. When the superposed voltage of the differential mode interference signals generated on the communication bus is greater than the maximum limit voltage value of the differential mode suppression circuit, the switching tube element of the differential mode suppression circuit can be instantly conducted, so that the communication bus is instantly grounded, and the voltage on the bus is released. For an electronic detonator priming system using bipolar parallel communication, two symmetrical differential mode suppression circuits are adopted in a communication bus, differential mode interference signals can be released more timely, the rear end of an electronic detonator is protected more effectively, particularly the chip part of the electronic detonator is not damaged, the anti-interference capability of the electronic detonator in the actual blasting environment is improved, the misfire is reduced, and the application scene of the electronic detonator is greatly expanded.
In addition, the invention also provides an electronic detonator, which comprises the electronic detonator communication circuit.
The beneficial effects of the electronic detonator provided by the invention are similar to the beneficial effect reasoning process of the electronic detonator communication circuit, and are not repeated herein.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings. The best mode or means of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In addition, the features, elements and components appearing in each of the following and in the drawings are plural and different symbols or numerals are labeled for convenience of representation, but all represent components of the same or similar construction or function.
[ description of the drawings ]
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a circuit diagram of a first embodiment of the present invention;
fig. 2 is a circuit diagram of a second embodiment of the invention.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference in the specification to "one embodiment" or "an example" means that a particular feature, structure or characteristic described in connection with the embodiment itself may be included in at least one embodiment of the patent disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides an electronic detonator communication circuit, which includes a communication bus L1, a communication bus L2, a rectifier circuit and a chip IC, wherein the rectifier circuit is a bridge rectifier circuit formed by diodes D3, D4, D5 and D6, the communication bus L1 and the communication bus L2 are respectively connected to the input end of the rectifier circuit, that is, the communication bus L1 is connected between the cathode of D3 and the anode of D4, the communication bus L2 is connected between the cathode of D5 and the anode of D6, the chip IC is connected to the output end of the rectifier circuit, that is, between the cathode of D4 and the cathode of D6, and the other output end of the rectifier circuit, that is, between the anode of D3 and the anode of D5. The electronic detonator initiator is communicated with the electronic detonator through a communication bus L1 and a communication bus L2 and provides a working power supply; because the electronic detonator communication adopts a bipolar communication mode, the positive and negative electrodes of the two communication buses do not need to be distinguished, so that only the alternating communication voltage on the communication bus L1 and the communication bus L2 needs to be processed into direct current voltage required by the work of the electronic detonator chip through a rectifying circuit, and the power supplies of the positive electrode VCC and the negative electrode GND are output.
The electronic detonator communication circuit provided by the embodiment further comprises a differential mode suppression circuit, the differential mode suppression circuit comprises a switching tube element and a voltage protection element, the voltage protection element can be a transient voltage suppression diode, a piezoresistor or a gas discharge tube, in the embodiment, the switching tube element adopts an NPN type triode Q1, the voltage protection element adopts a transient voltage suppression diode, and because the reaction speed of the transient voltage suppression diode is higher than that of other overvoltage protection elements, the transient voltage suppression diode can be instantly conducted when the input circuit is higher than the reverse conducting voltage of the input circuit, so that the effect of protecting electronic components in subsequent circuits is achieved, and therefore, the transient voltage suppression diode D1 is preferably adopted in the embodiment.
One end of the voltage protection element is connected to the communication bus L1, and the other end is grounded through a resistor R1, specifically, in the present embodiment, the cathode of the tvs D1 is connected to the communication bus L1, and the anode is grounded through a resistor R1. The switching tube element is provided with a signal control end, the base electrode of the NPN type triode Q1 is used as the signal control end of the switching tube element and is connected between the anode of the transient voltage suppression diode D1 and the resistor R1, the collector electrode of the NPN type triode is connected with the communication bus L1, and the emitter electrode of the NPN type triode is grounded.
In this embodiment, the communication bus L2 also has a differential mode suppression circuit, a voltage protection element of the differential mode suppression circuit is a transient voltage suppression diode D2, and a switching tube element is an NPN-type triode Q2. The cathode of the transient voltage suppression diode D2 is connected with the communication bus L2, and the anode is grounded through a resistor R2. The switching tube element is provided with a signal control end, the base electrode of the NPN type triode Q2 is used as the signal control end of the switching tube element and is connected between the anode of the transient voltage suppression diode D2 and the resistor R2, the collector electrode of the NPN type triode is connected with the communication bus L2, and the emitter electrode of the NPN type triode is grounded.
In this embodiment, the reverse breakdown voltage of the transient voltage suppression diode D1 is V1, the voltage of the communication bus L1 to ground is VL1, in a normal operating state, VL1 is less than V1, the transient voltage suppression diode D1 is turned off, the base of the NPN type triode Q1 is grounded through the resistor R1, and the base of the NPN type triode Q1 is at a low level, so that Q1 is turned off, and the entire electronic detonator communication circuit operates normally. When the amplitudes generated on the communication buses are equal and differential mode interference currents in opposite directions are generated, VL1 instantaneous voltage is very large, VL1 is larger than V1, at the moment, the transient voltage suppression diode D1 is conducted in the reverse direction, the base voltage of the NPN type triode Q1 is pulled high to be high level, the NPN type triode Q1 is conducted, the communication bus L1 is communicated with a power ground GND, the voltage on the communication bus L1 is released, and a subsequent circuit such as an electronic detonator chip IC is protected from being damaged. When the communication bus voltage returns to normal, the transient voltage suppression diode D1 returns to the cut-off state, the NPN type triode Q1 also returns to the cut-off state, and the circuit works normally. The working principle of the communication bus L2 and the differential mode suppression circuit thereof is the same as that of the communication bus L1 and the differential mode suppression circuit thereof, and the description thereof is omitted.
In the embodiment, the interference problem of the differential mode signal is solved by adding a hardware circuit in the internal circuit of the electronic detonator to inhibit the differential mode signal. When the superposed voltage of the differential mode interference signal generated on the communication bus L1 or L2 is larger than the maximum limit voltage value of the differential mode suppression circuit, the switching tube element of the differential mode suppression circuit can be conducted instantaneously, so that the communication bus is grounded immediately, and the voltage on the bus is released. For an electronic detonator priming system using bipolar parallel communication, two symmetrical differential mode suppression circuits are adopted in a communication bus, differential mode interference signals can be released more timely, the rear end of an electronic detonator is protected more effectively, particularly the chip part of the electronic detonator is not damaged, the anti-interference capability of the electronic detonator in the actual blasting environment is improved, the misfire is reduced, and the application scene of the electronic detonator is greatly expanded.
Example two
As shown in fig. 2, the present embodiment provides an electronic detonator communication circuit. Different from the first embodiment, in the present embodiment, the switching device is a PNP transistor Q3, the differential mode suppression circuit further includes a conversion device, the conversion device is an NPN transistor Q4, configured to convert a high level of the transient voltage suppression diode D1 of the voltage protection device into a low level when the differential mode interference occurs, a base of the NPN transistor Q4 of the conversion device is connected between an anode of the transient voltage suppression diode D1 and the resistor R1, a collector of the NPN transistor Q4 is connected to the communication bus L1 through the resistor R3, an emitter of the NPN transistor Q4 of the conversion device is grounded, a collector of the PNP transistor Q3 is connected to the signal control terminal, and therefore, the base of the PNP transistor Q3 is connected between the collector of the NPN transistor Q4 of the conversion device and the resistor R3.
In this embodiment, the communication bus L2 may be connected to a differential mode suppression circuit having the same structure as the communication bus L1, or may be connected to the differential mode suppression circuit in the first embodiment, but the present embodiment is not limited thereto, and a differential mode suppression circuit having the same structure as the communication bus L1 is preferably used in this embodiment.
In this embodiment, the reverse breakdown voltage of the transient voltage suppressor diode D1 is V1 ', the voltage to ground of the communication bus L1 is VL 1', in a normal operating state, VL1 '< V1', the transient voltage suppressor diode D1 is turned off, the base of the NPN transistor Q4 of the conversion element is grounded through the resistor R1, and therefore, the base is at a low level, the NPN transistor Q4 of the conversion element is turned off, further, the PNP transistor Q3 is also in a turned off state, and the entire electronic detonator communication circuit operates normally. When the amplitudes generated on the communication buses are equal and differential mode interference currents in opposite directions are generated, VL1 ' instantaneous voltage is very large, VL1 ' > V1 ', at this time, the transient voltage suppression diode D1 is conducted in the reverse direction, the base voltage of the NPN triode Q4 of the conversion element is pulled high to be high level, the NPN triode Q4 of the conversion element is conducted, the NPN triode Q4 of the conversion element is conducted, under the action of the resistor R3, the collector of the NPN triode Q4 of the conversion element is pulled low level, the PNP triode Q3 is conducted, the communication bus L1 is connected with the power ground GND, the voltage on the communication bus L1 is released, and subsequent circuits such as an electronic detonator chip IC are protected from being damaged. When the communication bus voltage returns to normal, the transient voltage suppression diode D1 returns to the cut-off state, the switching element NPN type triode Q4 and the PNP type triode Q3 also return to the cut-off state, and the circuit works normally. The working principle of the communication bus L2 and the differential mode suppression circuit thereof is the same as that of the communication bus L1 and the differential mode suppression circuit thereof in this embodiment or the first embodiment, and details thereof are not repeated here.
EXAMPLE III
A difference between this embodiment and the first embodiment is that, in this embodiment, the switching transistor element is an NMOS transistor, a gate of the NMOS transistor is a signal control terminal, a drain of the NMOS transistor is connected to the communication bus L1, and a source of the NMOS transistor is grounded.
Example four
The difference between this embodiment and the second embodiment is that, in this embodiment, the conversion element is an NMOS transistor, the gate of the NMOS transistor is connected between the anode of the tvs D1 and the resistor R1, the drain is connected to the communication bus L1 through the resistor R3, the source is grounded, and the drain of the NMOS transistor is connected to the signal control terminal, that is, the base of the PNP transistor Q3 is connected between the drain of the NMOS transistor and the resistor R3.
EXAMPLE five
The difference between this embodiment and the second embodiment is that, in this embodiment, the switching transistor element is a PMOS transistor, a gate of the PMOS transistor is a signal control terminal, and is connected between a collector of the NPN transistor Q4 of the conversion element and the resistor R3, a drain of the PMOS transistor is connected to the communication bus L1, and a source of the PMOS transistor is grounded.
EXAMPLE six
The difference between this embodiment and the fifth embodiment is that, in this embodiment, the conversion element is an NMOS transistor, a gate of the NMOS transistor is connected between an anode of the tvs D1 and the resistor R1, a drain of the NMOS transistor is connected to the communication bus L1 through the resistor R3, a source of the NMOS transistor is grounded, and a drain of the NMOS transistor is connected to the signal control terminal, that is, a gate of the PMOS transistor is connected between a drain of the NMOS transistor and the resistor R3.
EXAMPLE seven
The present embodiment provides an electronic detonator including the electronic detonator communication circuit according to any one of the first to sixth embodiments.
While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (11)
1. The electronic detonator communication circuit is characterized by further comprising a differential mode suppression circuit, wherein the differential mode suppression circuit comprises a switch tube element and a voltage protection element, one end of the voltage protection element is connected with the communication bus, the other end of the voltage protection element is grounded, the switch tube element is provided with a signal control end, the signal control end is connected with one end, grounded, of the voltage protection element, when differential mode interference occurs, the voltage protection element enables the switch tube element to be conducted through the signal control end, and the communication bus is grounded through the switch tube element.
2. The electronic detonator communication circuit of claim 1 wherein the switching tube element is an NPN type triode, a base of the NPN type triode is a signal control terminal, a collector is connected to the communication bus, and an emitter is grounded.
3. The electronic detonator communication circuit of claim 1 wherein the switching tube element is an NMOS tube, the gate of the NMOS tube is a signal control terminal, the drain is connected to the communication bus, and the source is grounded.
4. The electronic detonator communication circuit of claim 1 wherein the switching tube element is a PNP type triode, the differential mode suppression circuit further comprises a first switching element, a base of the PNP type triode is a signal control terminal, the base of the PNP type triode is connected to one end of the voltage protection element, which is grounded, through the first switching element, a collector is connected to the communication bus, and an emitter is grounded.
5. The electronic detonator communication circuit of claim 4 wherein the first converting element is an NPN-type triode for converting a high level of the voltage protecting element to a low level when a differential mode interference occurs, wherein a base of the NPN-type triode is connected to one end of the voltage protecting element, which is grounded, a collector of the NPN-type triode is connected to the communication bus through a resistor, an emitter of the NPN-type triode is grounded, and a collector of the NPN-type triode is connected to the signal control end.
6. The electronic detonator communication circuit of claim 4 wherein the first converting element is an NMOS transistor for converting the high level of the voltage protection element to the low level when the differential mode interference occurs, the gate of the NMOS transistor is connected to the ground end of the voltage protection element, the drain of the NMOS transistor is connected to the communication bus through a resistor, the source of the NMOS transistor is connected to the ground, and the drain of the NMOS transistor is connected to the signal control end.
7. The electronic detonator communication circuit of claim 1 wherein the switching tube element is a PMOS tube, the differential mode suppression circuit further comprises a second switching element, a gate of the PMOS tube is a signal control terminal, the gate of the PMOS tube is connected to the grounded terminal of the voltage protection element through the second switching element, a drain of the PMOS tube is connected to the communication bus, and a source of the PMOS tube is connected to ground.
8. The electronic detonator communication circuit of claim 7 wherein the second converting element is an NPN transistor for converting the high level of the voltage protecting element to the low level when the differential mode interference occurs, wherein the base of the NPN transistor is connected to the ground end of the voltage protecting element, the collector of the NPN transistor is connected to the communication bus through a resistor, the emitter of the NPN transistor is connected to the ground, and the collector of the NPN transistor is connected to the signal control end.
9. The electronic detonator communication circuit of claim 7 wherein the second switching element is an NMOS transistor for switching the high level of the voltage protection element to the low level when the differential mode interference occurs, the gate of the NMOS transistor is connected to the ground end of the voltage protection element, the drain is connected to the communication bus through a resistor, the source is connected to ground, and the drain of the NMOS transistor is connected to the signal control end.
10. Electronic detonator communication circuit according to any of claims 1 to 9 wherein the voltage protection element is a transient voltage suppressor diode, a varistor or a gas discharge tube.
11. An electronic detonator characterized in that it comprises an electronic detonator communication circuit according to any one of claims 1 to 10.
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| CN202010054585.0A CN111238326B (en) | 2020-01-17 | 2020-01-17 | Electronic detonator communication circuit and electronic detonator |
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Cited By (3)
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| CN112556521A (en) * | 2020-10-15 | 2021-03-26 | 上海芯跳科技有限公司 | Electronic detonator for improving communication anti-interference performance |
| CN112556520A (en) * | 2020-10-15 | 2021-03-26 | 上海芯跳科技有限公司 | Electronic detonator for improving communication reliability and anti-interference performance |
| CN115077312A (en) * | 2022-06-17 | 2022-09-20 | 贵州全安密灵科技有限公司 | Electronic detonator communication device, control module, electronic detonator and detonation control system |
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| CN111238326B (en) | 2022-11-25 |
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