A digital detonator ignition bridge wire open circuit detection circuit and detection method

Abstract

The present invention discloses a circuit and method for detecting an open-circuit ignition bridge wire in a digital detonator. This method uses the digital detonator's electronic control module to control the on / off switching of a switch tube and samples the voltage of the ignition capacitor C2 in the ignition bridge wire charging circuit. If the voltage across ignition capacitor C2 is 0, the ignition bridge wire is normal and not open-circuited; otherwise, the ignition bridge wire is open. The digital detonator open-circuit detection method provided by the present invention can effectively detect and screen for broken or open ignition bridge wires, thereby improving the product qualification rate of detonators.

Description

Technical Field

[0001] The present invention relates to the technical field of digital detonators, and in particular to a digital detonator ignition bridge wire open circuit detection circuit and detection method. Background Art

[0002] Digital detonators, also known as electronic detonators or digital intelligent detonators, utilize a circuit drive module containing a microcontroller chip to digitally drive an ignition head, which then ignites the detonator explosive. These detonators offer high delay accuracy and stable initiation, achieving the same detonation performance as traditional delayed ignition powders.

[0003] Typically, a digital detonator is connected to a digital detonator initiator, which sets the digital detonator's networking and delay. The digital detonator initiator and digital detonator are connected via two wires, with the initiator acting as the master and the digital detonator as the slave. Digital detonators typically initiate by igniting an ignition bridge wire at the detonator's port, which then controls the ignition bridge wire to ignite the ignition charge for detonation. The proper functioning of the ignition bridge wire directly impacts the proper detonation of the digital detonator and its product quality.

[0004] Traditional detonator ignition methods typically use a heating resistor detonation method, where heat from a heating resistor ignites the ignition charge on the ignition tip. This detonation triggers the detonator to detonate. Digital detonators differ in that they are entirely controlled by an internal electronic module, which houses an ignition capacitor. Upon receiving the detonation command from the digital detonator's initiator, the module controls the charging of the ignition capacitor. Once the ignition capacitor has completed its energy storage, the initiator sends the detonation command to the detonator, which then turns on the ignition switch. The stored energy in the ignition capacitor heats the detonator's ignition bridge wire, which in turn heats and ignites the ignition charge on the bridge wire, triggering the detonator to detonate. If the ignition bridge wire breaks in a digital detonator, the detonator will inevitably fail to detonate during engineering detonation. Identifying whether a digital detonator's ignition bridge wire is broken or open is a key quality inspection criterion for digital detonators. Currently, there is no safe and reliable method for detecting open-circuit ignition bridge wires in digital detonators. Summary of the Invention

[0005] The purpose of the present invention is to provide a digital detonator ignition bridge wire open circuit detection circuit and detection method, which can effectively detect whether the digital detonator ignition bridge wire is open circuit.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a digital detonator ignition bridge wire open circuit detection circuit, comprising: a digital detonator electronic control module, an ignition capacitor C2, an ignition bridge wire and a switch tube;

[0008] The digital detonator electronic control module is connected to three switch tubes Q1, Q2 and Q3;

[0009] The ignition bridge wire of the digital detonator is connected in series with the switch tube Q3 and connected in parallel to both ends of the power supply through the switch tube Q2;

[0010] The ignition capacitor C2 is connected in parallel with the series circuit of the ignition bridge wire and the switch tube Q3;

[0011] The two ends of the ignition capacitor C2 are connected to the digital detonator electronic control module;

[0012] The switch tube Q1 is connected in parallel with the series circuit of the ignition bridge wire and the switch tube Q3.

[0013] Furthermore, a working capacitor C1 is included, and the working capacitor C1 is connected in parallel to both ends of the power supply.

[0014] Furthermore, the digital detonator electronic control module is connected to the control electrodes of the three switch tubes Q1, Q2 and Q3.

[0015] Further,

[0016] The collector of the switch tube Q2 is connected to one end of the working capacitor C1, and the other end of the working capacitor C1 is connected to the digital detonator electronic control module;

[0017] The emitter of the switch tube Q2 is connected to the collector of the switch tube Q1, the ignition bridge wire and one end of the ignition capacitor C2; the emitter of the switch tube Q1, the emitter of the switch tube Q3 and the other end of the ignition capacitor C2 are connected, and are connected to the digital detonator electronic control module.

[0018] The present invention also provides a method for detecting an open circuit of an ignition bridge wire of a digital detonator, comprising:

[0019] The detonator electronic control module drives the switch tube Q1 to be disconnected and drives the switch tube Q3 to be turned on;

[0020] The A / D voltage value of the ignition capacitor C2 is collected through the detonator electronic control module. At this time, the voltage collected value across the ignition capacitor C2 is 0;

[0021] The detonator electronic control module drives the switch tube Q2 to conduct, charging the ignition capacitor C2;

[0022] The voltage value of the ignition capacitor C2 is continuously collected through the detonator electronic control module;

[0023] According to the voltage value of ignition capacitor C2, it is determined that the ignition bridge wire is open.

[0024] Furthermore, the determining whether the ignition bridge wire is open includes:

[0025] If the voltage value collected across the ignition capacitor C2 is 0, the ignition bridge wire is normal and is not in an open circuit state; otherwise, it means that the ignition bridge wire is open circuit.

[0026] The beneficial effects achieved by the present invention are:

[0027] The present invention is mainly used for product quality inspection of digital detonators. The digital detonator bridge wire open circuit detection method provided by the present invention can effectively detect and screen whether the ignition bridge wire is broken and open circuited, thereby improving the product qualification rate of the detonator. During engineering detonation, it can effectively improve the blasting success rate, which is of vital importance to detonator manufacturers and users. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a digital detonator ignition bridge wire open circuit detection circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below. The following examples are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0030] Example 1

[0031] This embodiment provides a digital detonator ignition bridge wire open circuit detection circuit, see Figure 1 , consists of a capacitor, a digital detonator electronic control module, an ignition bridge wire and a switch tube. Specifically, the digital detonator electronic control module D is connected to three switch tubes Q1, Q2 and Q3.

[0032] The ignition bridge wire F of the digital detonator is connected in series with the switch tube Q3 and is connected in parallel to both ends of the power supply through the switch tube Q2.

[0033] The ignition capacitor C2 is connected in parallel with the series circuit of the ignition bridge wire F and the switch tube Q3. The ignition capacitor C2 is used to provide energy to the ignition bridge wire F.

[0034] The two ends of the ignition capacitor C2 are also connected to the digital detonator electronic control module D, which is used to collect the voltage values ​​at the two ends of the ignition capacitor C2.

[0035] The switch tube Q1 is connected in parallel with the series circuit of the ignition bridge wire F and the switch tube Q3.

[0036] The working capacitor C1 is connected in parallel to both ends of the power supply. The working capacitor C1 is a filter capacitor used to filter out clutter in the circuit.

[0037] Specifically, the digital detonator electronic control module D is connected to the control electrodes of the three switch tubes Q1, Q2 and Q3;

[0038] The collector of the switch tube Q2 is connected to one end of the working capacitor C1, and the other end of the working capacitor C1 is connected to the digital detonator electronic control module D;

[0039] The emitter of the switch tube Q2 is connected to the collector of the switch tube Q1, the ignition bridge wire F and one end of the ignition capacitor C2; the emitter of the switch tube Q1, the emitter of the switch tube Q3 and the other end of the ignition capacitor C2 are connected and connected to the digital detonator electronic control module D.

[0040] Example 2

[0041] This embodiment provides a method for detecting an open circuit of the ignition bridge wire of a digital detonator. Based on the detection circuit of Example 1, the open circuit detection of the ignition bridge wire F is achieved by controlling the electronic control module of the digital detonator. The implementation steps are as follows:

[0042] (1) The detonator electronic control module D drives the switch tube Q1 to turn off and at the same time drives the switch tube Q3 to turn on, opening the charging circuit of the ignition capacitor C2;

[0043] (2) The detonator electronic control module D collects the A / D voltage value of the ignition capacitor C2. At this time, the voltage collected value across C2 should be 0;

[0044] (3) The detonator electronic control module D drives the switch tube Q2 to conduct, opens the front stage switch, and starts charging the ignition capacitor C2;

[0045] (4) The detonator electronic control module D continues to collect the voltage value of the positive terminal of the ignition capacitor C2. If the collected voltage value across C2 is 0, it means that the ignition bridge wire F is normal and is not in an open circuit state. The ignition bridge wire F and Q3 form a short circuit loop, short-circuiting C2 and making the voltage across C2 0.

[0046] If the voltage across C2 is not 0, and Q2 is turned on, the voltage directly charges C2, which means F is disconnected, that is, the ignition bridge wire is open.

[0047] By adopting the above steps, by controlling the on and off of the switch tube and collecting the voltage value at both ends of the ignition capacitor, it is possible to effectively determine whether the ignition bridge wire of the digital detonator is open.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for detecting an open circuit of an ignition bridge wire of a digital detonator, characterized in that: It is implemented based on a digital detonator ignition bridge wire open circuit detection circuit, and the digital detonator ignition bridge wire open circuit detection circuit includes: Digital detonator electronic control module, ignition capacitor C2, ignition bridge wire and switch tube; The digital detonator electronic control module is connected to three switch tubes Q1, Q2 and Q3; The ignition bridge wire of the digital detonator is connected in series with the switch tube Q3 and connected in parallel to both ends of the power supply through the switch tube Q2; The ignition capacitor C2 is connected in parallel with the series circuit of the ignition bridge wire and the switch tube Q3; The two ends of the ignition capacitor C2 are connected to the digital detonator electronic control module; The switch tube Q1 is connected in parallel with the series circuit of the ignition bridge wire and the switch tube Q3; The detection method comprises: The detonator electronic control module drives the switch tube Q1 to be disconnected and drives the switch tube Q3 to be turned on; The A / D voltage value of the ignition capacitor C2 is collected through the detonator electronic control module. At this time, the voltage collected value across the ignition capacitor C2 is 0; The detonator electronic control module drives the switch tube Q2 to conduct, charging the ignition capacitor C2; The voltage value of the ignition capacitor C2 is continuously collected through the detonator electronic control module; According to the voltage value of the ignition capacitor C2, it is judged that the ignition bridge wire is open. If the voltage value collected at both ends of the ignition capacitor C2 is 0, the ignition bridge wire is normal and is not in an open circuit state; otherwise, it means that the ignition bridge wire is open.

2. A method for detecting an open circuit of a digital detonator ignition bridge wire according to claim 1, characterized in that: The device further includes a working capacitor C1 connected in parallel to both ends of the power supply.

3. A method for detecting an open circuit of a digital detonator ignition bridge wire according to claim 2, characterized in that: The digital detonator electronic control module is connected to the control electrodes of three switch tubes Q1, Q2 and Q3.

4. A method for detecting an open circuit of a digital detonator ignition bridge wire according to claim 2, characterized in that: The collector of the switch tube Q2 is connected to one end of the working capacitor C1, and the other end of the working capacitor C1 is connected to the digital detonator electronic control module; The emitter of the switch tube Q2 is connected to the collector of the switch tube Q1, the ignition bridge wire and one end of the ignition capacitor C2; the emitter of the switch tube Q1, the emitter of the switch tube Q3 and the other end of the ignition capacitor C2 are connected, and are connected to the digital detonator electronic control module.

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