CN114508976A - Timing correction method based on MCU electronic detonator power-down delay wake-up timer - Google Patents
Timing correction method based on MCU electronic detonator power-down delay wake-up timer Download PDFInfo
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- 238000012937 correction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000004044 response Effects 0.000 claims abstract description 7
- 230000003111 delayed effect Effects 0.000 claims description 7
- 230000004622 sleep time Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 5
- 230000000977 initiatory effect Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000009462 micro packaging Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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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
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C11/00—Electric fuzes
- F42C11/06—Electric fuzes with time delay by electric circuitry
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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
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a timing correction method based on a power-down delay awakening timer of an MCU (microprogrammed control Unit), which is characterized in that an ARM (advanced RISC machine) controller sends commands and parameters to an electronic detonator through a power modulation bus and receives corresponding response data of the electronic detonator so as to calculate a correction coefficient of the power-down delay awakening timer of the electronic detonator, thereby solving the problem of large delay error of an RC (remote control) oscillator when an MCU (microprogrammed control Unit) chip of the detonator is powered down. The invention can simply, quickly and accurately obtain the correction coefficient of the RC timing counter of the MCU chip of the electronic detonator, and the corrected timing error rate can be reduced to about 5 per thousand.
Description
Technical Field
The invention relates to the application field of civil initiating explosive devices, in particular to a timing correction method based on a power-down delay awakening timer of an MCU (microprogrammed control unit) electronic detonator.
Background
The electronic detonator is a development trend in the field of civil initiating explosive devices, and can finally replace the conventional detonator with a detonating tube, and the core technology of the electronic detonator is a high-precision delayed detonation technology. Due to the limitation of the use environment, the volume of the detonator is small, and the detonator is resistant to impact and safe, so that the delay technology on the detonator chip is difficult.
At present, many manufacturers adopt a special SOC chip mode, an integrated circuit design technology is needed, and the requirement on the industry entry technology is high. And a general micro-packaging singlechip MCU plus peripheral bus drive circuit mode is adopted, so that the technical limit of the industry is reduced, and the method is more flexible. For example, chinese patent publication No. CN113324450A, published as 08/31/2021, discloses a high-reliability and high-precision electronic detonator initiation system and method, which includes an MCU control circuit, a communication circuit, a voltage boosting and firing circuit, an energy storage and discharge capacitor, a detonator detection circuit, and a time synchronization algorithm. The energy storage discharge capacitor and igniter detection circuit is in electric signal connection with the MCU control circuit and is used for continuously detecting the energy storage discharge capacitor and the ignition device of the key device for internal ignition of the electronic detonator, wherein the detection means that whether the device is in a normal working state before ignition is detected, and the working state can send an ignition instruction only if the device is in a normal working state, so that the phenomenon of 'explosion rejection' caused by the failure of the device when the ignition instruction is sent is avoided, and the reliability of the ignition of the electronic detonator is ensured; the time synchronization algorithm carries out bidirectional data communication through the initiator and a master-slave clock of the electronic detonator, achieves sub-microsecond time synchronization precision through a delay response mechanism, and improves the initiation time precision of the electronic detonator. In the technical scheme, the clock mainly acts on the normal work of the detonator MCU and is carried out in the detonator-based MCU.
The time length and precision of delayed awakening are key indexes of group control detonation of the detonator when the electronic detonator is powered off. However, there is no better method to control the delayed wake-up when power is off, and the existing delayed wake-up depends heavily on the RC oscillator, and the timing error is large (generally greater than 5% -30%). Therefore, it is necessary to develop a method for correcting the problem of large RC timing error of the MCU and reducing the timing error rate.
Disclosure of Invention
The invention provides a timing correction method based on a power-down delay awakening timer of an MCU (microprogrammed control unit) electronic detonator, aiming at solving the problem of high-precision delay awakening of the MCU.
The technical scheme adopted by the invention is as follows:
the timing correction method based on the MCU electronic detonator power-down delay awakening timer comprises the following timing correction steps:
step 1, sending a delay command and a time parameter to an MCU (microprogrammed control Unit) -based electronic detonator through a direct current power bus (powerbus) through an ARM (advanced RISC machine) controller, measuring a feedback signal of the electronic detonator in real time, and obtaining real and accurate delay time T of the electronic detonator through a feedback signal time tagr；
Step 2, obtaining a correction coefficient R of the electronic detonator MCU awakening timing counter, namely
Wherein T is a time parameter, and T is more than 0;
and 3, correcting the counter of the MCU wake-up timer through the correction coefficient R of the wake-up timer counter, wherein the set value C after the counter is corrected is as follows: c ═ r.crWherein, CrIs a desired count value.
Wherein, the step 1 obtains the real and accurate delay time T of the electronic detonatorrThe specific process is as follows:
(1) starting ARM timing, and setting the delay time to be 0, namely not delaying;
the ARM chip sends a command with the delay time of 0 to the electronic detonator, and simultaneously records a sending time tag ST0When waiting for the feedback command of the electronic detonator, the time tag ST of the feedback moment of the electronic detonator is recorded1To obtain the inherent delay value T of the DC power bus0＝ST1-ST0；
(2) Setting the delay time as T, namely awakening the electronic detonator after the sleep time T;
sending a command with delay time T to the electronic detonator, and simultaneously recording a sending time tag ST0sWhen the electronic detonator is waken up after the sleep time T and feeds back a command, the power is recordedTime label ST of feedback time of sub-detonator1sTo obtain the accurate time delay response time value T of the electronic detonator0r＝ST1s-ST0s；
(3) The inherent time delay of the direct current power supply bus is eliminated, and the corresponding real and accurate time T of the electronic detonator time delay T is obtainedr＝T0r-T0。
Further, the wake-up timer counter is a 16-bit timer, a timing clock source of the wake-up timer counter is derived from a 32kHz RC oscillator inside the MCU, timing error is very large, timing length is determined by setting a threshold of a 15-bit counter, and timing is stepped by 0.5 ms.
In the step 1, the time delay command and the time parameter are sent to the electronic detonator through a direct current power bus (powerbus) through an ARM controller, specifically, the ARM controller is communicated with the direct current power bus through a main bus, the direct current power bus is communicated with an electronic detonator control circuit through a slave bus, and the ARM controller and the main bus form an ARM correction circuit.
The timing clock source of the awakening timing counter is different from a clock of the MCU which normally works and is a preset started clock based on passive RC oscillation, when the detonator is powered off, once the detonator enters a power-off mode, the MCU cannot control the timing clock, and the MCU can be automatically switched to an MCU control mode only by waiting for the overflow of the delayed awakening timer.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the invention, the ARM controller sends the delay command and the time parameter to the electronic detonator, and the response of the electronic detonator is measured, so that the correction coefficient of the RC timing counter of the MCU chip of the electronic detonator can be simply, quickly and accurately obtained, and the timing error rate after correction can be reduced to about 5 per thousand.
Drawings
FIG. 1 is a circuit diagram of the present invention.
FIG. 2 is a schematic timing correction flow chart according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The timing correction method based on the MCU electronic detonator power-down delay awakening timer comprises the following timing correction steps:
step 1, transmitting a delay command and time parameters to an electronic detonator based on an MCU (microprogrammed control Unit) through a direct current power bus by an ARM (advanced RISC machine) controller, measuring a feedback signal of the electronic detonator in real time, and obtaining real and accurate delay time T of the electronic detonator through a feedback signal time tagr；
Step 2, obtaining a correction coefficient R of the electronic detonator MCU awakening timing counter, namely
Wherein T is a time parameter, and T is more than 0;
and 3, correcting the counter of the MCU wake-up timer through the correction coefficient R of the wake-up timer counter, wherein the set value C after the counter is corrected is as follows: c ═ r.crWherein, CrIs a desired count value.
After the correction by the method, the timing error rate can be reduced to about 5 per thousand. The timing correction method is suitable for correcting the power-down delay awakening timer of the MCU chip of the electronic detonator.
Example 2
As shown in fig. 2, the overall method based on embodiment 1, wherein step 1 obtains the real and accurate delay time T of the electronic detonatorrThe specific process is as follows:
(1) starting ARM timing, and setting the delay time to be 0, namely not delaying;
the ARM chip sends a command with the delay time of 0 to the electronic detonator, and simultaneously records a sending time tag ST0When waiting for the feedback command of the electronic detonator, the time tag ST of the feedback moment of the electronic detonator is recorded1To obtain the inherent delay value T of the DC power bus0＝ST1-ST0；
(2) Setting the delay time as T, namely awakening the electronic detonator after the sleep time T;
sending a command with delay time T to the electronic detonator, and simultaneously recording a sending time tag ST0sWhen the electronic detonator is waken up after the sleep time T and feeds back the command, the time tag ST of the feedback time of the electronic detonator is recorded1sTo obtain the accurate time delay response time value T of the electronic detonator0r＝ST1s-ST0s；
(3) The inherent time delay of the direct current power supply bus is eliminated, and the corresponding real and accurate time T of the electronic detonator time delay T is obtainedr＝T0r-T0。
Example 3
Based on the specific process of embodiment 2, in this embodiment, the delay time T in step (2) is designed to be 2-5 seconds.
Example 4
Based on the method of embodiment 1 or 2, wherein the wake-up timer counter is a 16-bit timer, the timing clock source of the wake-up timer counter is derived from the 32kHz RC oscillator inside the MCU, the timing error is very large, the timing length is determined by setting a threshold of a 15-bit counter, and the timing is stepped by 0.5 ms.
Example 5
As shown in fig. 1, in this embodiment, the ARM controller in step 1 communicates with the dc power bus through the master bus, and the dc power bus communicates with the electronic detonator control circuit through the slave bus, wherein the ARM controller and the master bus form an ARM calibration circuit.
The ARM controller is an ARM chip circuit module, namely an STM32F429 core board.
The awakening timing counter of the ARM correction circuit adopts a quartz crystal oscillator circuit, the number of the quartz crystal oscillator circuit is 25M, and the stability of the awakening timing counter is less than 50 ppm.
The ARM correction circuit is matched with a stable and accurate clock, a high-stability time tag can be generated, a feedback instruction of the electronic detonator can be responded in real time, and the actual accurate response time of the electronic detonator can be accurately measured by using the high-stability time tag and the feedback instruction of the detonator.
The timing clock source of the awakening timing counter is different from a clock of the MCU which normally works and is a preset started clock based on passive RC oscillation, when the detonator is powered off, once the detonator enters a power-off mode, the MCU cannot control the timing clock, and the MCU can be automatically switched to an MCU control mode only by waiting for the overflow of the delayed awakening timer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The timing correction method based on the MCU electronic detonator power-down delay awakening timer is characterized by comprising the following timing correction steps:
step 1, transmitting a delay command and time parameters to an electronic detonator based on an MCU (microprogrammed control Unit) through a direct current power bus by an ARM (advanced RISC machine) controller, measuring a feedback signal of the electronic detonator in real time, and obtaining real and accurate delay time T of the electronic detonator through a feedback signal time tagr；
Step 2, obtaining a correction coefficient R of the electronic detonator MCU awakening timing counter, namely
Wherein T is a time parameter, and T is more than 0;
and 3, correcting the counter of the MCU wake-up timer through the correction coefficient R of the wake-up timer counter, wherein the set value C after the counter is corrected is as follows: c ═ r.crWherein, CrIs a desired count value.
2. The MCU-based electronic detonator power down delay of claim 1The timing correction method of the time wakeup timer is characterized by comprising the following steps: step 1, obtaining the real and accurate delay time T of the electronic detonatorrThe specific process is as follows:
(1) starting ARM timing, and setting the delay time to be 0, namely not delaying;
the ARM chip sends a command with the delay time of 0 to the electronic detonator, and simultaneously records a sending time tag ST0When waiting for the feedback command of the electronic detonator, the time tag ST of the feedback moment of the electronic detonator is recorded1To obtain the inherent delay value T of the DC power bus0＝ST1-ST0；
(2) Setting the delay time as T, namely awakening the electronic detonator after the sleep time T;
sending a command with delay time T to the electronic detonator, and simultaneously recording a sending time tag ST0sWhen the electronic detonator is waken up after the sleep time T and feeds back the command, the time tag ST of the feedback time of the electronic detonator is recorded1sTo obtain the accurate time delay response time value T of the electronic detonator0r＝ST1s-ST0s；
(3) The inherent time delay of the direct current power supply bus is eliminated, and the corresponding real and accurate time T of the electronic detonator time delay T is obtainedr＝T0r-T0。
3. The timing correction method based on the MCU electronic detonator power-down delay wake-up timer according to claim 1, characterized in that: the awakening timing counter is a 16-bit timer, a timing clock source of the awakening timing counter is derived from a 32kHz RC oscillator inside the MCU, the timing length is determined by setting a threshold value of a 15-bit counter, and the timing is stepped by 0.5 milliseconds.
4. The timing correction method based on the MCU electronic detonator power-down delay wake-up timer according to claim 1, characterized in that: in the step 1, the ARM controller is communicated with a direct current power supply bus through a main bus, the direct current power supply bus is communicated with an electronic detonator control circuit through a slave bus, and the ARM controller and the main bus form an ARM correction circuit.
5. The timing correction method based on the MCU electronic detonator power-down delay wake-up timer according to claim 1, characterized in that: and a timing clock source of the awakening timing counter is a preset started clock based on passive RC oscillation.
6. The timing correction method based on the MCU electronic detonator power-down delay wake-up timer according to claim 1 or 5, characterized in that: when the electronic detonator is powered off, entering a power-off mode; and waiting for the delayed awakening timer to overflow, and automatically switching to the MCU control mode.
7. The timing correction method based on the MCU electronic detonator power-down delay wake-up timer according to claim 1, characterized in that: the timing correction method is suitable for correcting the power-down delay awakening timer of the MCU chip of the electronic detonator.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2010376A1 (en) * | 1990-02-19 | 1991-08-19 | Glen Peter Ii Goffin | Method and apparatus for a calibration electronic timing circuit |
| US20090260532A1 (en) * | 2005-11-02 | 2009-10-22 | Orica Explosives Technology Pty Ltd | Method for Assigning a Delay Time to Electronic Delay Detonators |
| WO2011027991A2 (en) * | 2009-09-03 | 2011-03-10 | 주식회사 한화 | Method for setting a reference time in a microcontroller, and electronic detonator using the method |
| KR101293801B1 (en) * | 2013-01-30 | 2013-08-06 | 주식회사 한화 | Method for counting delay time of electronic detonator |
| CN105509581A (en) * | 2015-12-04 | 2016-04-20 | 无锡力芯微电子股份有限公司 | Electronic detonator, programmer and delay time setting method of electronic detonator |
| CN105698617A (en) * | 2016-01-25 | 2016-06-22 | 北京理工大学 | Electronic detonator controlled through detonation controller and control method thereof |
| US20180306564A1 (en) * | 2017-04-19 | 2018-10-25 | Ultra Electronics Maritime Systems Inc. | Method and system for remote magneto-inductive detonation |
| CN110895125A (en) * | 2019-11-08 | 2020-03-20 | 重庆云铭科技股份有限公司 | Method for calibrating internal clock of electronic detonator chip |
-
2021
- 2021-12-29 CN CN202111640488.0A patent/CN114508976B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2010376A1 (en) * | 1990-02-19 | 1991-08-19 | Glen Peter Ii Goffin | Method and apparatus for a calibration electronic timing circuit |
| US20090260532A1 (en) * | 2005-11-02 | 2009-10-22 | Orica Explosives Technology Pty Ltd | Method for Assigning a Delay Time to Electronic Delay Detonators |
| WO2011027991A2 (en) * | 2009-09-03 | 2011-03-10 | 주식회사 한화 | Method for setting a reference time in a microcontroller, and electronic detonator using the method |
| KR101293801B1 (en) * | 2013-01-30 | 2013-08-06 | 주식회사 한화 | Method for counting delay time of electronic detonator |
| CN105509581A (en) * | 2015-12-04 | 2016-04-20 | 无锡力芯微电子股份有限公司 | Electronic detonator, programmer and delay time setting method of electronic detonator |
| CN105698617A (en) * | 2016-01-25 | 2016-06-22 | 北京理工大学 | Electronic detonator controlled through detonation controller and control method thereof |
| US20180306564A1 (en) * | 2017-04-19 | 2018-10-25 | Ultra Electronics Maritime Systems Inc. | Method and system for remote magneto-inductive detonation |
| CN110895125A (en) * | 2019-11-08 | 2020-03-20 | 重庆云铭科技股份有限公司 | Method for calibrating internal clock of electronic detonator chip |
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