CN111928743B - Time delay calibration method for electronic fuse - Google Patents

Time delay calibration method for electronic fuse Download PDF

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Publication number
CN111928743B
CN111928743B CN202010802123.2A CN202010802123A CN111928743B CN 111928743 B CN111928743 B CN 111928743B CN 202010802123 A CN202010802123 A CN 202010802123A CN 111928743 B CN111928743 B CN 111928743B
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calibration
delay
electronic
counter
standard clock
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CN111928743A (en
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冯海珂
周其瑾
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Shanghai Zanxin Electronic Technology Co ltd
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Shanghai Zanxin Electronic Technology Co ltd
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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
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Pulse Circuits (AREA)

Abstract

The invention provides a time delay calibration method for an electronic fuse, which comprises the following steps: receiving a standard clock starting instruction; the calibrated counter of the electronic fuze starts counting; receiving a standard clock ending instruction; stopping counting by the calibration counter, and storing and acquiring a current count value N of the calibration counter; and calculating to obtain a calibrated delay count value Kcal(ii) a And the calibration time M is separated between the receiving of the standard clock ending instruction and the receiving of the standard clock starting instruction. The time required by the time delay calibration method for completing time delay calibration is not limited by the ignition time delay preset by the electronic fuse, and compared with the existing calibration method, the time delay calibration method can more quickly achieve time delay calibration.

Description

Time delay calibration method for electronic fuse
Technical Field
The invention relates to the field of electronic fuses, in particular to a time delay calibration method for an electronic fuse.
Background
The electronic fuse has a delayed ignition function. The function means that the electronic fuse is ignited after delaying for a preset time after receiving an ignition instruction. Due to the precision of the internal clock of the electronic fuse, in an application scenario with a high requirement on delay precision, the delay precision of the electronic fuse may be insufficient and cannot meet the requirement, and at this time, the delay of the electronic fuse needs to be calibrated.
The conventional time delay calibration method is that an initiator outputs a square wave with a fixed period on a communication bus, an electronic fuse receives the square wave, and a counter is started to count at the same time. Assuming that the square wave period is N, the electronic fuze preset delay is M. And after the electronic fuse receives the M/N square waves, the counter stops counting and stores the count value. This count is the calibrated delay count.
One drawback of the above-mentioned delay calibration method is that the time required for completing the delay calibration process is relatively long, because the delay calibration method performs the delay calibration according to the actual delay time M of the electronic fuse, that is, the time required for the delay calibration process is the same as the actual delay time, and the longer the delay time M preset by the electronic fuse is, the longer the time required for completing the delay calibration by the electronic fuse is.
Another drawback of the above-mentioned delay calibration method is that, when performing delay calibration on a plurality of electronic fuses in the same network, the time required to complete the delay calibration process is not shorter than the maximum time among the preset delay times of the plurality of electronic fuses in the network.
In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.
Disclosure of Invention
The main advantage of the present invention is to provide a delay calibration method for an electronic fuse, wherein the time required for completing the delay calibration by the delay calibration method is not limited by the ignition delay preset by the electronic fuse, and the delay calibration can be realized more quickly than the existing calibration method.
Another advantage of the present invention is to provide a delay calibration method for an electronic fuse, when a plurality of electronic fuses exist in a network, the time required for the delay calibration of all electronic fuses in the network to be completed by the delay calibration method is not limited by a maximum time among ignition delays preset by the plurality of electronic fuses, and the delay calibration of all electronic fuses in the network can be completed within one calibration time shorter than the maximum time.
To achieve at least one of the above objects or advantages, the present invention provides a delay calibration method for an electronic fuze, including:
receiving a standard clock starting instruction;
the calibrated counter of the electronic fuze starts counting;
receiving a standard clock ending instruction;
stopping counting by the calibration counter, and storing and acquiring a current count value N of the calibration counter;
calculating to obtain a calibrated delay count value Kcal；
And the calibration time M is separated between the receiving of the standard clock ending instruction and the receiving of the standard clock starting instruction.
In an embodiment of the present invention, before the calibration counter of the electronic fuze starts counting, the method further includes:
clearing the electronic fuze from the count value of the calibrated counter.
In one embodiment of the present inventionIn an embodiment, the electronic fuze starts counting at intervals of the actual period t of the calibration counter2 factThe count value of the calibration counter is incremented by 1.
In an embodiment of the present invention, the method for calibrating delay time of an electronic fuze further includes:
sending a calibration starting instruction;
sending a standard clock starting instruction;
after the standard clock start instruction interval calibration time M is transmitted, a standard clock end instruction is transmitted.
In one embodiment of the invention, the receive standard clock start instruction is subsequent to the transmit standard clock start instruction.
In one embodiment of the invention, the receive std-clock end instruction is subsequent to the transmit std-clock end instruction.
In an embodiment of the present invention, the method for calibrating a delay time of an electronic fuze further includes, after sending a calibration start instruction:
and receiving a calibration starting instruction, and emptying the count value of the calibration counter of the electronic fuse.
In one embodiment of the present invention, the calibration time M is in a range of 100 to 1000 milliseconds.
In one embodiment of the invention, the calculation results in a calibrated delay count value KcalIn (3), the calibrated delay count value KcalAccording to formula Kcal＝T×N×t2/(M×t1) Calculated, wherein T is the ignition delay of the electronic fuse, T1Is the delay count period of the delay counter of the electronic fuze, t2A calibration count period of a calibration counter for the electronic fuze.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a delay calibration method for an electronic fuse at an initiator end according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a delay calibration method for an electronic fuse according to an embodiment of the present invention at an electronic fuse end;
fig. 3 is a flowchart illustrating a delay calibration method for an electronic fuse according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the following description is provided for disclosing the present invention to enable those skilled in the art to implement the present invention, and the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to facilitate understanding of the delay calibration method for an electronic fuse of the present invention, a delay ignition function of the electronic fuse will be briefly described. The electronic fuse is provided with a delay counter, and the delay counting period of the delay counter is t1Said delayed count period t1Is a design value. When the ignition delay T of the electronic fuse is set by a user, the electronic fuse is self-ignitionDynamically calculating a delay count value K, wherein the delay count value K is T/T according to a formula K1And (6) calculating. When the electronic fuse receives an ignition instruction, the delay counter starts counting, and the counting is carried out at intervals of t1The delay count value is decremented by 1. And after the delay count value is reduced to 0, the delay is finished, and the electronic fuse is ignited.
Due to the limited precision of the internal clock of the electronic fuse, the actual period t of the delay counter is caused1 factAnd said delayed count period t1The delay count value K is therefore calibrated to reduce the error of the delayed ignition.
In combination with the basic principle of the delay ignition function and aiming at the defects of the prior art, the invention successfully provides the delay calibration method for the electronic fuse, wherein the time required by the delay calibration method for completing the delay calibration is not limited by the preset ignition delay T of the electronic fuse, and compared with the existing calibration method, the delay calibration can be realized more quickly. It should be noted that a plurality of electronic fuses may exist in the same network, and in this embodiment, the delay calibration method for an electronic fuse is explained in detail by taking only one electronic fuse as an example.
Referring to the attached figure 1 of the specification, at the initiator end, the initiator sends a calibration start instruction to notify the electronic fuze to start delay calibration, then the initiator sends a standard clock start instruction to notify a calibration counter of the electronic fuze to start counting, and after waiting for a time interval of calibration time M, the initiator sends a standard clock end instruction. The calibration time M is a preset time, wherein the value of the calibration time M is set according to the precision of the internal clock of the electronic fuse, if the precision of the internal clock of the electronic fuse is high, the calibration time M can be set to be a shorter time, and if the precision of the internal clock of the electronic fuse is low, the calibration time M needs to be set to be a longer time. Specifically, the calibration time M ranges from 100 milliseconds to 1000 milliseconds.
Referring to FIG. 2 of the specification, in the electronicsThe electronic fuse end receives the calibration starting instruction, clears the counting value of the calibration counter of the electronic fuse, prepares for time delay calibration, starts counting after the electronic fuse receives the standard clock starting instruction, stops counting after the electronic fuse receives the standard clock ending instruction, stores the current counting value N, and finally obtains the calibrated time delay counting value K through calculationcalAnd finishing the time delay calibration. Due to the calibrated delay count value KcalThe calculation algorithm has low complexity through calculation, and the required calculation time can be ignored, so that the time required for completing the delay calibration is the set calibration time M.
The calculation of the calibrated delay count value K will be explained in detail belowcalSo that one skilled in the art can understand the delay calibration method for an electronic fuze proposed by the present invention. The delayed counting period t of the delayed counter of the electronic fuse1And a calibration count period t of a calibration counter of said electronic fuze2Are all designed values, and the delay counting period t is limited due to the limited precision of the internal clock of the electronic fuse1And said calibration count period t2Not the actual period of itself, in order to derive the calibrated delay count value KcalDefining the actual period of said delay counter as t1 factAnd defining the actual period of said calibration counter as t2 fact。
It will be appreciated that the actual period t of the delay counter1 factAnd said delayed count period t1And the actual period t of said calibration counter2 factAnd the calibration count period t2Both caused by the deviation of the internal clock of the electronic fuze from the standard clock. The design value of the period is therefore positively correlated with the actual value of the period, i.e. the actual period t of the delay counter1 factThe delay count period t1Actual period t of the calibration counter2 factAnd stationThe calibration count period t2Satisfies the following relationship of formula (1):
t1/t1 fact＝t2/t2 fact (1)
Further, according to the description and illustration of the initiator end and the electronic fuze end, the current count value N, the calibration time M and the actual period t of the calibration counter of the electronic fuze are stored by the calibration counter2 factSatisfies the following relationship of formula (2):
N＝M/t2 fact (2)
Further, according to the basic principle of the delay ignition function of the electronic fuse, the calibrated delay count value KcalIgnition delay T of the electronic fuse and actual period T of the delay counter1 factSatisfies the following relation of equation (3):
Kcal＝T/t1 fact (3)
The calibrated delay count value K can be obtained by combining the above formula (1), formula (2) and formula (3)calThe calculation method of (2) is as follows:
Kcal＝T×N×t2/(M×t1)
with reference to the above embodiment of the present invention and referring to fig. 3 of the specification, the method for calibrating delay time of an electronic fuze according to the present invention includes the following steps:
s101, receiving a standard clock starting instruction;
s102, starting counting by a calibration counter of the electronic fuse;
s103, receiving a standard clock ending instruction;
s104, stopping counting by the calibration counter, and storing and acquiring a current count value N of the calibration counter;
s105, calculating to obtain a calibrated delay count value Kcal；
And the calibration time M is separated between the receiving of the standard clock ending instruction and the receiving of the standard clock starting instruction.
Further, before the step S102, the method further includes the step of: the count value of the calibration counter for emptying the electronic fuze can be understood to be before the step S101 or after the step S101.
Further, the method for calibrating the time delay of the electronic fuze further comprises the following steps:
sending a calibration starting instruction;
sending a standard clock starting instruction;
after the standard clock start instruction interval calibration time M is transmitted, a standard clock end instruction is transmitted.
In particular, the receive standard clock start instruction follows the transmit standard clock start instruction.
In particular, the receive standard clock end instruction follows the transmit standard clock end instruction.
In particular, after sending the calibration start command, the method further comprises: and receiving a calibration starting instruction, and emptying the count value of the calibration counter of the electronic fuse.
Specifically, in the step S102, the calibration counter is divided by an actual period t2 factThe count value of the calibration counter is incremented by 1.
Specifically, the calibration time M ranges from 100 milliseconds to 1000 milliseconds.
Specifically, in the step S105, the calibrated delay count value KcalAccording to formula Kcal＝T×N×t2/(M×t1) Calculated, wherein T is the ignition delay of the electronic fuse, T1Is the delay count period of the delay counter of the electronic fuze, t2A calibration count period of a calibration counter for the electronic fuze.
In another embodiment of the present invention, a plurality of electronic fuses are provided in the same network, each electronic fuse can receive the calibration start command after the calibration start command is sent, all the electronic fuses can start the delay calibration respectively, and the preset calibration time M is less than the maximum time among the ignition delays of the plurality of electronic fusesInter Tmax。
Therefore, when a plurality of electronic fuses exist in the network, the time required by the time calibration method for completing the time calibration of all the electronic fuses in the network is not limited by the maximum time T in the ignition time delay preset by the electronic fusesmaxCan be shorter than the maximum time TmaxAnd within one calibration time M, completing the time delay calibration of all the electronic fuses in the network.
Those skilled in the art will appreciate that the embodiments of the invention illustrated in the drawings and described above are merely exemplary and not limiting of the invention.
It will thus be seen that the objects of the invention are efficiently and effectively attained and that the embodiments illustrating the principles of the invention, both as to its function and its construction, have been fully shown and described, and that the invention is not limited by any changes in the principles of the embodiments illustrated. Accordingly, this invention includes all modifications encompassed within the scope and spirit of the following claims.

Claims (8)

1. A method of time delay calibration for an electronic fuze, comprising:
receiving a standard clock starting instruction;
the calibrated counter of the electronic fuze starts counting;
receiving a standard clock ending instruction;
stopping counting by the calibration counter, and storing and acquiring a current count value N of the calibration counter;
calculating to obtain a calibrated delay count value Kcal；
The calibration time M is separated between the receiving of the standard clock ending instruction and the receiving of the standard clock starting instruction; wherein said calculating yields a calibrated delay count value KcalIn (3), the calibrated delay count value KcalAccording to formula Kcal＝T×N×t2/(M×t1) Calculated, wherein T is the ignition delay of the electronic fuse, T1For counting cycles of a delay counter of said electronic fuzePeriod t of2A calibration count period of a calibration counter for the electronic fuze.
2. The delay calibration method for an electronic detonator as claimed in claim 1, further comprising, before the calibration counter of the electronic detonator starts counting:
clearing the electronic fuze from the count value of the calibrated counter.
3. The delay calibration method for an electronic fuze according to claim 1, characterized in that in the start count of the calibration counter of the electronic fuze, the actual period t of the calibration counter is separated2 factThe count value of the calibration counter is incremented by 1.
4. The delay calibration method for an electronic fuze according to claim 1, further comprising:
sending a calibration starting instruction;
sending a standard clock starting instruction;
after the standard clock start instruction interval calibration time M is transmitted, a standard clock end instruction is transmitted.
5. The delay calibration method for an electronic fuze according to claim 4, wherein the receiving standard clock start instruction is after the sending standard clock start instruction.
6. The delay calibration method for an electronic fuze according to claim 4, wherein the receiving standard clock end command follows the sending standard clock end command.
7. The delay calibration method for an electronic fuze according to claim 4, further comprising, after sending the calibration start command:
and receiving a calibration starting instruction, and emptying the count value of the calibration counter of the electronic fuse.
8. The delay calibration method for an electronic fuze according to any one of claims 1-7, wherein the calibration time M is in the range of 100-1000 milliseconds.
CN202010802123.2A 2020-08-11 2020-08-11 Time delay calibration method for electronic fuse Active CN111928743B (en)

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CN113033022B (en) * 2021-04-22 2022-06-17 杭州国芯科技股份有限公司 Delay compensation method of field bus network

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CN1192269A (en) * 1995-07-26 1998-09-02 旭化成工业株式会社 Electronic delay detonator
CN2736821Y (en) * 2004-05-18 2005-10-26 西安电子科技大学 Programmable logic device based short time interval meter
CN101586931A (en) * 2008-11-10 2009-11-25 北京铱钵隆芯科技有限责任公司 Adjustable electronic detonator control chip and flow for controlling same
CN109525351A (en) * 2018-10-26 2019-03-26 中国科学院国家授时中心 A kind of equipment for realizing time synchronization with time reference station
CN111189368A (en) * 2020-01-19 2020-05-22 杭州晋旗电子科技有限公司 System and method for improving detonator delay precision and calibration efficiency

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US6914492B2 (en) * 2003-09-25 2005-07-05 Lsi Logic Corporation Digital programmable delay scheme with automatic calibration

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
CN1055094A (en) * 1990-03-10 1991-10-02 阿特拉斯动力公司 The method and apparatus of calibrated electronic timing circuit
CN1192269A (en) * 1995-07-26 1998-09-02 旭化成工业株式会社 Electronic delay detonator
CN2736821Y (en) * 2004-05-18 2005-10-26 西安电子科技大学 Programmable logic device based short time interval meter
CN101586931A (en) * 2008-11-10 2009-11-25 北京铱钵隆芯科技有限责任公司 Adjustable electronic detonator control chip and flow for controlling same
CN109525351A (en) * 2018-10-26 2019-03-26 中国科学院国家授时中心 A kind of equipment for realizing time synchronization with time reference station
CN111189368A (en) * 2020-01-19 2020-05-22 杭州晋旗电子科技有限公司 System and method for improving detonator delay precision and calibration efficiency

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