CN115014136B - Digital detonator ignition bridge wire fault detection circuit and detection method - Google Patents
Digital detonator ignition bridge wire fault detection circuit and detection method Download PDFInfo
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- CN115014136B CN115014136B CN202210408972.9A CN202210408972A CN115014136B CN 115014136 B CN115014136 B CN 115014136B CN 202210408972 A CN202210408972 A CN 202210408972A CN 115014136 B CN115014136 B CN 115014136B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C21/00—Checking fuzes; Testing fuzes
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a digital detonator ignition bridge wire fault detection circuit and a detection method, wherein the method controls the on and off of an MOS tube through an electronic control module of a digital detonator, and draws a qualified digital detonator ignition bridge wire voltage characteristic curve and a voltage characteristic curve of the digital detonator ignition bridge wire to be detected; comparing the two, if the voltage drop rate of the ignition bridge wire of the tested detonator is obviously lower than that of the qualified detonator, the detonator ignition bridge wire is proved to have faults. The digital detonator bridge wire fault detection method provided by the invention can effectively screen out unqualified products during detonator production, and improves the product qualification rate of the detonator.
Description
Technical Field
The invention relates to the technical field of digital detonators, in particular to a digital detonator ignition bridge wire fault detection circuit and a digital detonator ignition bridge wire fault detection method.
Background
The digital detonator, also called digital electronic detonator, electronic detonator or industrial digital electronic detonator, adopts an electronic control module to control the detonation process, and adopts a control integrated module to drive an ignition head through the module so as to realize the detonation of the detonator. Compared with the traditional mode of adopting delayed ignition powder to detonate the detonator, the detonation timing precision of the digital detonator is incomparable with that of the traditional detonator, the ignition powder of the digital detonator is attached to the ignition bridge wire, and the control integrated module detonates the ignition powder by controlling the ignition bridge wire to heat and then detonates the detonator. Whether the digital detonator is detonated normally or not plays a decisive role in the failure of the ignition bridge wire, and the detection of the failure of the ignition bridge wire of the digital detonator in factory production also concerns the production efficiency and quality of the detonator.
The whole working process from networking to detonation of the digital detonator is controlled by an electronic module in the detonator, and the detonator detonation is finally discharged by an ignition capacitor carried by the digital detonator plate to drive the ignition bridge wire to heat, so that the ignition powder attached to the ignition bridge wire is detonated, and the detonator is detonated. If the bridge wire resistance of the ignition bridge wire of the digital detonator is overlarge, the ignition bridge wire cannot be heated to the ignition point of the ignition powder by means of the energy of the ignition capacitor, so that the detonator is refused to be exploded. How to identify whether the ignition bridge wire of the digital detonator is faulty or not is an important research direction for improving the qualification rate of the digital detonator. At present, in the field of digital detonators, how to perform fault detection on ignition bridge wires of the digital detonators has not yet been provided with a safe and reliable method.
Disclosure of Invention
The invention aims to provide a digital detonator ignition bridge wire fault detection circuit and a digital detonator ignition bridge wire fault detection method, and whether the digital detonator ignition bridge wire is faulty or not can be effectively detected by controlling detection equipment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a digital detonator ignition bridge wire fault detection circuit, which comprises: the digital detonator electronic control module, the ignition capacitor C1, the ignition bridge wire and the MOS tube;
the digital detonator electronic control module is connected with three MOS tubes Q1, Q2 and Q3;
the ignition bridge wire of the digital detonator is connected with the MOS tube Q3 in series and is connected with two ends of the power supply in parallel through the MOS tube Q1;
the ignition capacitor C1 is connected with the serial circuit of the ignition bridge wire and the MOS tube Q3 in parallel;
the two ends of the ignition capacitor C1 are connected with the digital detonator electronic control module;
and the MOS tube Q2 is connected with the serial circuit of the ignition bridge wire and the MOS tube Q3 in parallel.
Further, the power supply further comprises a working capacitor C2, and the working capacitor C2 is connected in parallel to two ends of the power supply.
Further, the voltage waveform detection device is connected to two ends of the ignition bridge wire and is used for measuring the voltage of the two ends of the ignition bridge wire.
Further, the digital detonator electronic control module is connected with the bases of the three MOS tubes Q1, Q2 and Q3;
the drain electrode of the MOS tube Q1 is connected with one end of the working capacitor C2; the source electrode of the MOS tube Q1 is connected with the drain electrode of the MOS tube Q2, the ignition bridge wire and one end of the ignition capacitor C1; the source electrode of the MOS tube Q2, the source electrode of the MOS tube Q3 and the other end of the ignition capacitor C1 are connected and connected to the digital detonator electronic control module.
The invention also provides a digital detonator ignition bridge wire fault detection method, which comprises the following steps:
drawing a voltage characteristic curve of qualified digital detonator ignition bridge wire voltage and time;
the digital detonator ignition bridge wire fault detection circuit is adopted to measure and draw a voltage characteristic curve of the digital detonator ignition bridge wire to be detected;
comparing the voltage characteristic curve of the digital detonator ignition bridge wire to be detected with the voltage characteristic curve of the qualified digital detonator ignition bridge wire voltage and time;
and judging the fault of the ignition bridge wire according to the comparison result.
Further, the drawing of the voltage characteristic curve of the voltage and time of the ignition bridge wire of the qualified digital detonator comprises the following steps:
selecting a batch of digital detonators which are subjected to manual detection to determine qualification;
placing the selected qualified digital detonator ignition bridge wire in the digital detonator ignition bridge wire fault detection circuit, and connecting the ignition bridge wire to two ends of voltage waveform detection equipment;
the MOS tube Q1 is driven to be cut off by the detonator electronic control module, and the MOS tube Q3 is driven to be cut off;
the detonator electronic control module is used for acquiring the A/D voltage value of the ignition capacitor C1, and the voltage acquisition value of the ignition capacitor C1 is 0;
the MOS tube Q2 is driven to be cut off by the detonator electronic control module, and the MOS tube Q1 is driven to be conducted at the same time, so that the ignition capacitor C1 is charged;
the detonator electronic control module is used for continuously collecting the voltage value of the ignition capacitor C1 until the charging voltage of the ignition capacitor C1 reaches 3.6V, and the MOS tube Q1 is driven to cut off by the detonator electronic control module;
the MOS tube Q3 is controlled to be conducted through the detonator electronic control module, and the voltage at two ends of the ignition bridge wire is measured through the voltage waveform detection equipment, so that a characteristic curve of the voltage and time of the ignition bridge wire is obtained;
and (3) repeatedly operating each qualified digital detonator, fitting the obtained characteristic curve, and drawing a voltage characteristic curve of the ignition bridge wire voltage and time of the qualified digital detonator.
Further, the measuring and drawing the voltage characteristic curve of the digital detonator ignition bridge wire to be detected comprises the following steps:
the digital detonator ignition bridge wire to be detected is arranged in the digital detonator ignition bridge wire fault detection circuit, and the ignition bridge wire is connected to two ends of the voltage waveform detection equipment;
the MOS transistors Q1, Q2 and Q3 are driven to be cut off by the detonator electronic control module;
the detonator electronic control module is used for acquiring an A/D voltage value of the ignition capacitor C1, and the acquisition value of the C1 voltage is 0;
keeping the MOS transistors Q2 and Q3 cut off, driving the MOS transistor Q1 to be conducted through the detonator electronic control module, and charging the ignition capacitor C1;
the detonator electronic control module is used for collecting the voltage value of the ignition capacitor C1, and the MOS tube Q1 is driven to cut off until the charging voltage of the C1 reaches 3.6V;
and the MOS tube Q3 is driven to be conducted through the detonator electronic control module, the voltage of the fire bridge wire to be detected is detected through the voltage waveform detection equipment, and a voltage characteristic curve of the digital detonator ignition bridge wire to be detected is drawn.
Further, the method also comprises the steps of,
if the charging voltage of the ignition capacitor C1 exceeds 3.6V, the ignition capacitor C1 needs to be controlled to discharge by the detonator electronic control module, and the ignition capacitor C1 is charged again after the complete discharge.
Further, the judging of the ignition bridge wire fault includes:
if the voltage drop rate of the digital detonator ignition bridge wire to be detected is consistent with the voltage drop rate of the qualified digital detonator ignition bridge wire, the digital detonator ignition bridge wire to be detected is qualified; otherwise, the digital detonator ignition bridge wire to be detected has faults.
The beneficial effects of the invention are as follows:
the method is mainly used for product quality inspection of the digital detonator, and the method for detecting the bridge wire faults of the digital detonator can effectively screen out unqualified products during detonator production, improve the product qualification rate of the detonator, and effectively improve the blasting success rate during engineering detonation, which is very important for detonator manufacturers and users.
Drawings
Fig. 1 is a schematic diagram of a digital detonator ignition bridge wire fault detection circuit provided in embodiment 1 of the present invention;
FIG. 2 is a voltage characteristic curve of voltage versus time for an ignition bridge wire plotted in example 2 of the present invention;
FIG. 3 is a comparison of the voltage characteristic curve of the ignition bridge wire of the tested detonator with the voltage characteristic curve of the ignition bridge wire of the qualified detonator in example 2 of the present invention;
fig. 4 is a comparison of the voltage characteristic curve of the ignition bridge wire of the tested detonator with the voltage characteristic curve of the ignition bridge wire of the qualified detonator in embodiment 2 of the invention.
Detailed Description
The invention is further described below. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1
The embodiment provides a digital detonator ignition bridge wire fault detection circuit, which is shown in fig. 1 and comprises a capacitor, a digital detonator electronic control module, an ignition bridge wire and an MOS tube. Specifically, the digital detonator electronic control module D is connected with three MOS tubes Q1, Q2 and Q3,
the ignition bridge wire F of the digital detonator is connected with the MOS tube Q3 in series and is connected with two ends of the power supply in parallel through the MOS tube Q1.
The ignition capacitor C1 is connected in parallel with a serial circuit of the ignition bridge wire F and the MOS tube Q3. The ignition capacitor C1 is used for supplying energy to the ignition bridge wire F.
The two ends of the ignition capacitor C1 are also connected with a digital detonator electronic control module D, and the digital detonator electronic control module D is used for collecting voltage values of the two ends of the ignition capacitor C1.
The MOS tube Q2 is connected in parallel with a serial circuit of the ignition bridge wire F and the MOS tube Q3.
The working capacitor C2 is connected in parallel to two ends of the power supply, and the working capacitor C2 is a filter capacitor for filtering clutter in the circuit.
The voltage waveform detection device is used for measuring the voltages at the two ends of the ignition bridge wire F to form a voltage characteristic curve.
Specifically, the digital detonator electronic control module D is connected with the bases of three MOS tubes Q1, Q2 and Q3;
the drain electrode of the MOS tube Q1 is connected with one end of a working capacitor C2, and the other end of the working capacitor C2 is connected with a digital detonator electronic control module D;
the source electrode of the MOS tube Q1 is connected with the drain electrode of the MOS tube Q2; the drain electrode of the MOS tube Q2 is connected with one end of a fire bridge wire F and one end of an ignition capacitor C1; the source electrode of the MOS tube Q2, the source electrode of the MOS tube Q3 and the other end of the ignition capacitor C1 are connected and connected to the digital detonator electronic control module D.
The electronic control module of the digital detonator is used for controlling the on and off of the MOS tube, and the electronic module AD detection and the bridge wire current detection are combined to calculate the resistance of the ignition bridge wire, so that the fault detection of the ignition bridge wire F is realized.
Example 2
The present embodiment is based on the detection circuit of embodiment 1, and performs fault detection on the ignition bridge wire F as follows:
the detection method is divided into two steps in total, wherein the first step is to measure the discharge waveform of the ignition bridge wire of the digital detonator with qualified test quality, and obtain the voltage characteristic curve of the voltage and time of the ignition bridge wire, and the specific flow is as follows:
(11) Selecting a batch of digital detonators which are detected manually and are confirmed to be qualified, and measuring the discharge waveform of the ignition bridge wire;
(12) Placing a qualified digital detonator ignition bridge wire in the detection circuit of the embodiment 1, and connecting the ignition bridge wire to two ends of voltage waveform detection equipment;
(13) The detonator electronic control module D drives the MOS tube Q1 to cut off, and closes the front-stage power supply channel;
(14) The electronic control module D drives the MOS tube Q3 to cut off, and cuts off a power supply channel of the break point fire bridge wire;
(15) The detonator electronic control module D collects the A/D voltage value of the ignition capacitor C1, and the C1 voltage collection value is 0 at the moment;
(16) The detonator electronic control module D drives the MOS tube Q2 to be cut off, drives the MOS tube Q1 to be conducted, and opens a front-stage power supply switch to charge the ignition capacitor C1;
(17) The detonator electronic control module D continues to collect the voltage value of the ignition capacitor C1 until the charging voltage of the C1 reaches 3.6V, the detonator control module drives the MOS tube Q1 to cut off, cuts off the charging voltage of the ignition capacitor C1, and prevents the detonator from detonating caused by the overhigh voltage value of the two ends of the ignition bridge wire;
(18) The detonator electronic control module D controls the MOS tube Q3 to be conducted, and meanwhile, voltage waveform detection equipment measures voltage waveforms at two ends of the ignition bridge wire F; the energy of the ignition bridge wire is provided by an ignition capacitor C1, the bridge wire has impedance, the ignition bridge wire consumes the energy of C1 at moment after Q3 is conducted, the energy of C1 is continuously consumed along with time, the voltage values at the two ends of C1 are gradually reduced, and the characteristic curve of the voltage and time of the ignition bridge wire is obtained by measuring the voltage at the two ends of the ignition bridge wire F;
(19) Each digital detonator performs the operations of steps (12) - (18), and the voltage characteristic curve of the ignition bridge wire voltage and time is drawn according to the voltage waveform measured by the qualified detonator batch, as shown in fig. 2.
The voltage waveform detection device is a waveform measurement device necessary for communication electronic engineering, and an oscilloscope is generally used.
In step (13), the front-stage power supply path refers to the leftmost power supply end (i.e., two power supply ends) in fig. 1, and after Q1 is cut off, the power supply end in fig. 1 does not supply power.
The voltage waveform of a batch of qualified detonators is measured, and the waveform is subjected to fitting treatment, so that a voltage characteristic curve of the qualified detonators can be drawn. The waveforms of a plurality of qualified detonators are measured, so that the measured detonator voltage characteristic curve can be the most accurate.
Secondly, connecting the detonator to be tested to voltage waveform detection equipment, and judging whether the ignition bridge wire fails or not, wherein the specific flow is as follows:
(21) The detonator electronic control module D drives the MOS tube Q1 to cut off, and closes the front-stage power supply channel;
(22) The detonator electronic control module D drives the MOS tube Q3 to cut off, and cuts off a power supply channel of the break point fire bridge wire;
(23) The detonator electronic control module D drives the MOS tube Q2 to cut off, and the detonator electronic control module D collects the A/D voltage value of the ignition capacitor C1, and the C1 voltage collection value is 0 at the moment;
(24) Keeping the MOS tube Q2 cut off, and the detonator electronic control module D drives the MOS tube Q1 to be conducted, and opening a front-stage power supply switch to charge the ignition capacitor C1;
(25) The detonator electronic control module D continues to collect the voltage value of the ignition capacitor C1 until the charging voltage of the C1 reaches 3.6V, the detonator electronic control module drives the MOS tube Q1 to cut off, the charging voltage of the ignition capacitor C1 is cut off, and the detonator detonation caused by the overhigh voltage value of the two ends of the ignition bridge wire is prevented.
If the charging voltage of the ignition capacitor C1 exceeds 3.6V, the detonator electronic control module needs to control the ignition capacitor C1 to discharge, and the ignition capacitor C1 is charged again after the complete discharge;
(26) After the ignition capacitor C1 is charged, the detonator electronic control module D drives the MOS tube Q3 to be conducted, and meanwhile, voltage waveform detection equipment detects the voltage of the fire bridge wire F, and an ignition bridge wire discharge curve of the detonator is drawn; drawing a voltage characteristic curve of ignition bridge wire voltage and time,
(27) Comparing the ignition bridge wire discharge curve of the tested detonator with the voltage characteristic curve drawn when the qualified detonator discharges, if the voltage drop rate of the ignition bridge wire of the tested detonator is obviously lower than that of the qualified detonator, as shown in fig. 3, indicating that the ignition bridge wire resistance of the tested detonator is larger, indicating that the detonator ignition bridge wire has faults;
if the voltage drop rate of the ignition bridge wire of the tested detonator is basically equal to the voltage drop rate of the qualified detonator, as shown in fig. 4, the resistance value of the ignition bridge wire of the tested detonator meets the detonator initiation requirement, and the ignition bridge wire of the tube is qualified.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (8)
1. The utility model provides a digital detonator ignition bridge wire fault detection circuit which characterized in that includes: the digital detonator electronic control module, the ignition capacitor C1, the ignition bridge wire, the MOS tube and the voltage waveform detection device;
the digital detonator electronic control module is connected with three MOS tubes Q1, Q2 and Q3;
the ignition bridge wire of the digital detonator is connected with the MOS tube Q3 in series and is connected with two ends of the power supply in parallel through the MOS tube Q1;
the ignition capacitor C1 is connected with the serial circuit of the ignition bridge wire and the MOS tube Q3 in parallel;
the two ends of the ignition capacitor C1 are connected with the digital detonator electronic control module;
the MOS tube Q2 is connected with the serial circuit of the ignition bridge wire and the MOS tube Q3 in parallel;
the voltage waveform detection device is used for measuring the voltages at the two ends of the ignition bridge wire.
2. The digital detonator ignition bridge wire fault detection circuit of claim 1 further comprising a working capacitor C2, wherein the working capacitor C2 is connected in parallel to both ends of the power supply.
3. The digital detonator ignition bridge wire fault detection circuit of claim 2, wherein the digital detonator electronic control module is connected with the bases of three MOS transistors Q1, Q2 and Q3;
the drain electrode of the MOS tube Q1 is connected with one end of the working capacitor C2; the source electrode of the MOS tube Q1 is connected with the drain electrode of the MOS tube Q2, the ignition bridge wire and one end of the ignition capacitor C1; the source electrode of the MOS tube Q2, the source electrode of the MOS tube Q3 and the other end of the ignition capacitor C1 are connected and connected to the digital detonator electronic control module.
4. The digital detonator ignition bridge wire fault detection method is characterized by comprising the following steps:
drawing a voltage characteristic curve of qualified digital detonator ignition bridge wire voltage and time;
measuring and drawing a voltage characteristic curve of the digital detonator ignition bridge wire to be detected by adopting the digital detonator ignition bridge wire fault detection circuit of any one of claims 1 to 3;
comparing the voltage characteristic curve of the digital detonator ignition bridge wire to be detected with the voltage characteristic curve of the qualified digital detonator ignition bridge wire voltage and time;
and judging the fault of the ignition bridge wire according to the comparison result.
5. The method for detecting the fault of the ignition bridge wire of the digital detonator according to claim 4, wherein the drawing of the voltage characteristic curve of the voltage and time of the ignition bridge wire of the qualified digital detonator comprises the following steps:
selecting a batch of digital detonators which are subjected to manual detection to determine qualification;
placing the selected qualified digital detonator ignition bridge wire in the digital detonator ignition bridge wire fault detection circuit of any one of claims 1 to 3, and connecting the ignition bridge wire to two ends of voltage waveform detection equipment;
the MOS tube Q1 is driven to be cut off by the detonator electronic control module, and the MOS tube Q3 is driven to be cut off;
the detonator electronic control module is used for acquiring the A/D voltage value of the ignition capacitor C1, and the voltage acquisition value of the ignition capacitor C1 is 0;
the MOS tube Q2 is driven to be cut off by the detonator electronic control module, and the MOS tube Q1 is driven to be conducted at the same time, so that the ignition capacitor C1 is charged;
the detonator electronic control module is used for continuously collecting the voltage value of the ignition capacitor C1 until the charging voltage of the ignition capacitor C1 reaches 3.6V, and the MOS tube Q1 is driven to cut off by the detonator electronic control module;
the MOS tube Q3 is controlled to be conducted through the detonator electronic control module, and the voltage at two ends of the ignition bridge wire is measured through the voltage waveform detection equipment, so that a characteristic curve of the voltage and time of the ignition bridge wire is obtained;
and (3) repeatedly operating each qualified digital detonator, fitting the obtained characteristic curve, and drawing a voltage characteristic curve of the ignition bridge wire voltage and time of the qualified digital detonator.
6. The method for detecting the fault of the ignition bridge wire of the digital detonator according to claim 4, wherein the measuring and drawing the voltage characteristic curve of the ignition bridge wire of the digital detonator to be detected comprises the following steps:
placing a digital detonator ignition bridge wire to be detected in the digital detonator ignition bridge wire fault detection circuit of any one of claims 1 to 3, and connecting the ignition bridge wire to two ends of voltage waveform detection equipment;
the MOS transistors Q1, Q2 and Q3 are driven to be cut off by the detonator electronic control module;
the detonator electronic control module is used for acquiring an A/D voltage value of the ignition capacitor C1, and the acquisition value of the C1 voltage is 0;
keeping the MOS transistors Q2 and Q3 cut off, driving the MOS transistor Q1 to be conducted through the detonator electronic control module, and charging the ignition capacitor C1;
the detonator electronic control module is used for collecting the voltage value of the ignition capacitor C1, and the MOS tube Q1 is driven to cut off until the charging voltage of the C1 reaches 3.6V;
and the MOS tube Q3 is driven to be conducted through the detonator electronic control module, the voltage of the fire bridge wire to be detected is detected through the voltage waveform detection equipment, and a voltage characteristic curve of the digital detonator ignition bridge wire to be detected is drawn.
7. The method for detecting a failure of a digital detonator ignition bridge wire of claim 6, further comprising,
if the charging voltage of the ignition capacitor C1 exceeds 3.6V, the ignition capacitor C1 needs to be controlled to discharge by the detonator electronic control module, and the ignition capacitor C1 is charged again after the complete discharge.
8. The method for detecting a fault in an ignition bridge wire of a digital detonator according to claim 4, wherein the step of judging the fault in the ignition bridge wire comprises the steps of:
if the voltage drop rate of the digital detonator ignition bridge wire to be detected is consistent with the voltage drop rate of the qualified digital detonator ignition bridge wire, the digital detonator ignition bridge wire to be detected is qualified; otherwise, the digital detonator ignition bridge wire to be detected has faults.
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| CN202210408972.9A CN115014136B (en) | 2022-04-19 | 2022-04-19 | Digital detonator ignition bridge wire fault detection circuit and detection method |
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| CN115014136A (en) | 2022-09-06 |
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