WO2011027991A2

WO2011027991A2 - Method for setting a reference time in a microcontroller, and electronic detonator using the method

Info

Publication number: WO2011027991A2
Application number: PCT/KR2010/005730
Authority: WO
Inventors: 박윤석; 양재현; 강용묵
Original assignee: 주식회사 한화; 안병호
Priority date: 2009-09-03
Filing date: 2010-08-26
Publication date: 2011-03-10
Also published as: KR101016538B1; WO2011027991A3

Abstract

The present invention relates to an electronic detonator using a method for setting a reference time in a microcontroller, which detonates precisely after a delay time elapses in accordance with the command from a main control device, such as a detonator blast delay time setup command, blast command, and the like, wherein the electronic detonator comprises: a rectifier circuit for rectifying the source signal received from the main control device; a power storage circuit connected to an output of the rectifier circuit, which supplies power divided by a voltage-dividing circuit to a microcontroller; a blasting energy storage circuit which supplies energy divided by the voltage-dividing circuit to the detonator; a switching circuit for supplying energy stored in the blasting energy storage circuit to the detonator; a shunt circuit interconnected between the switching circuit and the detonator to protect the detonator from a sudden electrical impact applied by an external source; and said microcontroller, which operates a timer in accordance with the method for setting a reference time in a microcontroller as described in claim 1, so as to control the switching circuit and to enable the detonator to detonate after a detonator blast delay time elapses. The electronic detonator of the present invention can be ignited and detonated in a sequence while maintaining a remarkably precise, significantly short time difference in the delay time of 1/1,000 of a second. The electronic detonator of the present invention is advantageous in that vibration and noise caused by blasting are reduced, fragmentation in a blasting site is improved, and the costs of controlling an excessive excavation during the construction of a tunnel can be significantly reduced.

Description

How to set reference time in microcontroller and electronic primer using the method

The present invention relates to an electronic primer for precisely controlling the detonation time in the blasting operation for sequentially blasting the explosives by mounting a plurality of explosives to the destruction target such as a rock or a building, more specifically embedded in the microcontroller A reference time setting algorithm that improves the accuracy of the RC oscillator, and a method of setting the reference time in the microcontroller that can trigger the primer after the primer start delay time by measuring the primer start delay time precisely using the same and an electronic method using the method It's about the primer.

The blasting technique is steadily evolving, based on years of experience and development. The electronic primer stores the electrical energy supplied from the main controller in the energy storage circuit, and performs a switching operation so that the energy stored in the energy storage circuit is supplied to the primer after a predetermined delay time elapses. Electronic Detonator, which can adjust Delay Time to an Integrated Circuit, has been developed by introducing the technology of the electronic industry, which is developing at a high speed, and is increasing its utilization.

Conventional primers have a built-in delay element to set the combustion time of the element to detonation time, and detonation time changes during use because the precision at detonation time is significantly lower than that of the electronic detonator and also determines detonation time at the time of manufacture. impossible.

In contrast, electronic primers use high-density integrated circuits to increase precision at the time of detonation, and can arbitrarily set and change the detonation time using two-wire communication with the main control device (charger). You can change it.

However, the current communication method of the electronic primer uses serial asynchronous communication. Due to the limitation of the size of the primer and the cost, the crystal oscillator is not used to improve the precision.

Therefore, the sampling rate of the communication system is not accurate, so the communication speed is relatively slow, and when a large number of primers are connected, it takes a lot of time to check and set the detonation time of each primer. In case of installation, there is a problem that communication error occurs frequently and reliability is low.

An object of the present invention is to provide a method for setting a reference time in a microcontroller that can accurately perform a sampling operation without change by a preamble received from a main controller.

It is another object of the present invention to measure an electronic primer using a reference time setting method in the microcontroller to precisely measure the primer detonation time using the reference time setting method in the microcontroller to blast the primer after the detonation delay time. The purpose is to provide.

It is still another object of the present invention to provide an electronic primer using a reference time setting method in a microcontroller for protecting the primer from an external sudden electric shock (electric shock such as lightning or static electricity).

In the microcontroller of the present invention for achieving the above object, the reference time setting method includes a start pulse and a stop pulse from the main controller in the reference time setting method for improving the accuracy of the RC oscillator built in the microcontroller. Receiving a data frame including a preamble; As soon as the microcontroller receiving the preamble receives the start pulse of the preamble, the microcontroller starts counting the oscillation clock by the RC oscillator built in the microcontroller and counts the count until the stop pulse of the preamble is received. Storing in a first registry of; And storing a counter value in a second registry in which the coefficient of the oscillation clock by the built-in RC oscillator of the microcontroller defines a reference time of 1 ms, which is a reference time at the current temperature and voltage.

And storing the counter value of the oscillation clock by the built-in RC oscillator of the microcontroller defining a 1-bit width by dividing the value stored in the first registry by the total number of standard pulses of the preamble in the third registry. Characterized in that made.

In addition, the counter value defining 1ms, the reference time, is determined by dividing the value obtained by multiplying the standard pulse of the preamble by a value corresponding to a predefined 1-bit time by 1ms to determine a fixed value corresponding to 1ms, which is the reference time for the standard pulse. After the determination, the value stored in the first registry is divided by a predetermined value.

In addition, the timer operation of the microcontroller includes a second registry value that stores a counter value that defines a reference time of 1 ms, which is a reference time of the microcontroller's built-in RC oscillator, and the microcontroller receives a blasting command from the main controller and simultaneously If the value of counting the internal clock of the RC oscillator is the same, characterized in that it further comprises the step of increasing by 1ms.

The electronic primer using the reference time setting method in the microcontroller of the present invention for realizing another object is controlled to precisely trigger the primer after the delay time in accordance with the command of the main control device, such as the detonation delay time setting and the blast command An electronic primer comprising: a rectifier circuit for rectifying a signal source received from a main controller, a power storage circuit connected to an output of the rectifier circuit, divided by a voltage divider circuit, and supplying power to a microcontroller, by the voltage divider circuit A blasting energy storage circuit that is divided to supply energy to the primer, a switching circuit for supplying energy stored in the blasting energy storage circuit to the primer, and is connected between the switching circuit and the primer to prevent external sudden electric shock. Shunt circuit for protecting primer, hemp To operate the timer as a reference time setting method in the controller croissant, after the initiation delay time is characterized in that comprises a microcontroller for blasting a detonator by controlling the switching circuit.

The microcontroller may further include receiving a data frame including a preamble including a start pulse and a stop pulse from a main controller; As soon as the microcontroller receiving the preamble receives the start pulse of the preamble, the microcontroller starts counting the oscillation clock by the RC oscillator built in the microcontroller and counts the count until the stop pulse of the preamble is received. Storing in a first registry of; Storing a counter value in a second registry in which a coefficient of an oscillation clock by a built-in RC oscillator of the microcontroller defines 1 ms, which is a reference time at a current temperature and voltage; When receiving the blasting command from the main controller, when the second registry value and the microcontroller receives the blasting command from the main controller and the value of counting the internal clock of the built-in RC oscillator of the microcontroller is equal to 1ms which is a reference time Operating a timer to increment by increments; Opening a shunt circuit when the time measured by the timer operation and the predetermined primer delay time coincide with the nonvolatile storage means of the primer; And shorting the switching circuit to expel the charge by rapidly discharging the charge accumulated in the blasting energy storage circuit in the primer fuse head.

The microcontroller may store the delay time value in non-volatile storage means when receiving a command to set the delay time of the primer from the main controller.

In addition, the microcontroller is characterized in that when receiving the command to transmit the delay delay time set value of the primer from the main controller, the delay time set value set in the nonvolatile storage means to the main controller.

In addition, the microcontroller uses the value stored in the third registry, which is a counter value of the oscillation clock of the built-in RC oscillator of the microcontroller that defines a 1-bit width by dividing the value stored in the first registry by the total number of standard pulses of the preamble. To form the pulse width, switch the transistor Q1 of the transmission circuit, and output a high (H) or low (L) signal to control the connection state of the primer to the main controller and the setting of the delay delay time set in the nonvolatile storage means. And transmits to the device.

In addition, according to the voltage divided by R1 and R2, the power storage circuit has R4, a diode D2, and a capacitor EC2 connected in series to accumulate charge in the capacitor EC2, and to connect a Zener diode ZD1 in parallel with the capacitor EC2. It is characterized by supplying power to the microcontroller by maintaining a constant voltage.

In addition, the blast energy storage circuit is characterized in that the charge is accumulated in the capacitor EC1 by connecting R3, the diode D1 and the capacitor EC1 in series according to the voltage divided by R1 and R2.

In addition, since the shunt circuit has transistors Q4 and Q5 short-circuited since charges accumulate in the blasting energy storage circuit, both ends of the primer are grounded to protect the primer from sudden electric shock from the outside. Is open, so that the transistor Q4 is also opened.

In addition, the switching circuit short-circuits the transistor Q3 when the transistor Q2 is shorted by the control of the microcontroller after the delay delay time by the blasting command of the main controller, thereby rapidly discharging the charge accumulated in the blast energy storage circuit at both ends of the primer fuse head. It is characterized by exploding the primer.

According to the reference time setting method and the electronic primer using the method in the microcontroller according to the present invention, by using a general-purpose microcontroller with an oscillating circuit using the reference time setting method, the precision and error-free communication state at the beginning of the explosion can be obtained. It is also possible to significantly reduce manufacturing costs compared to electronic primers currently in use.

Create more industrial effects and profits by supplying low cost electronic primers to consumers who have not been able to use them because of the high price of existing electronic primers, while knowing the advantages such as improved precision, crushing effect and vibration reduction of electronic primer products. can do.

The electronic primer of the present invention significantly improves the accuracy of detonation at the time of detonation compared to the detonator using a widely used flame retardant, and ignition of the detonation at the same time while maintaining very precise parallax to a very short 1 / 1,000 second. It is an electronic primer that can be exploded. Therefore, there is an advantage that the vibration and noise due to the blasting, the crushing effect of the blasting site can be improved, and the cost due to the overdrilling control at the opening of the tunnel can be significantly reduced.

1 is a simplified diagram showing a data frame and sampling including a preamble received from a main controller to set a reference time in a microcontroller according to the present invention.

2 is an electronic primer block diagram using a reference time setting method in the MCU of the present invention, Figure 3 is a detailed circuit diagram for this.

4A and 4B are block diagrams illustrating a communication method between a main controller and an electronic primer.

5 is a flowchart showing the operation of the electronic primer using the reference time setting method in the microcontroller according to the present invention.

100: main controller 110: microcontroller side of the main controller

200: electronic primer control means 210: rectifier circuit

220: voltage divider circuit 230: transmission circuit

240: power storage circuit 250: blasting energy storage circuit

260: microcontroller 270: switching circuit

280: Shunt circuit 300: Primer

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Here, the same reference numerals will be used for the same components as the prior art.

First, the main controller transmits a primer blast delay time setting and a blast command to a microcontroller (hereinafter referred to as MCU) that controls the primer trigger. As shown in FIG. 1, the main controller transmits a data frame having a preamble, an instruction, an address, and data information to a MCU using a clock generated as a source by generating a precise clock at a communication start time.

As shown in FIG. 1A, the MCU receives a time standard pulse of a certain length from the main controller in the form of a preamble including a start pulse, a pulse having an arbitrary length, and a stop pulse. Here, the MCUs of each electronic primer are all connected in parallel with the main controller and receive data frames including the preambles to operate independently.

Here, the MCUs of the electronic primers start counting the oscillation clock by the RC oscillator built in the MCU immediately after receiving the start pulse of the preamble and counting them until the stop pulse of the preamble is received. Save it in the registry.

Next, a counter value in which the coefficient of the oscillation clock by the MCU's built-in RC oscillator defines a reference time of 1 ms based on the current temperature and voltage is stored in the second registry. First, a value obtained by multiplying a standard pulse of a preamble by a value corresponding to a predefined 1-bit time is divided by 1 ms to obtain a confirmation value X corresponding to 1 ms, which is a reference time for a standard pulse, and then into the first registry. By dividing the stored value by the fixed value (X), a counter value that defines a value of 1 ms, which is a reference time of the MCU's built-in RC oscillator, can be obtained.

Therefore, the value stored in the second registry is set differently depending on the temperature of each electronic primer MCU's site of use and the voltage supplied to the logic circuit.

Next, the value stored in the first registry is divided by the total number of standard pulses of the preamble to store the counter value of the oscillation clock by the built-in RC oscillator of the MCU that defines a 1-bit width in the third registry. Sampling is performed based on a value stored in a third registry defined by the defined 1-bit width to communicate with the main controller.

As an embodiment of the present invention, it will be described on the assumption that the MCU has received a preamble having a total of 10 pulses of a start pulse, 8 pulses, and a stop pulse.

First, when the MCU receives the start pulse of the preamble, it starts counting the oscillation clock by the RC oscillator built in the MCU, counts until the stop pulse of the preamble is received, and stores the count value in the first registry of the MCU. .

Next, when the value corresponding to 1 bit time is defined as 500 μs, the pulse length is 10 * 500 μs = 5 ms. To obtain a counter value that defines a reference time of 1 ms, 5 ms / 1 ms is used to obtain a definite value of 5 (X), and dividing the value stored in the first registry by the definite value of 5 (X) determines the reference of the MCU's built-in RC oscillator. You can get the counter value that defines the time value of 1ms.

Next, the value stored in the first registry is divided by 10, which is the total number of standard pulses of the preamble, to store the counter value of the oscillation clock by the MCU's built-in RC oscillator that defines a 1-bit time (500 μs in this case). do.

Hereinafter, a method of triggering the primer after the detonation delay time of the electronic primer by the method of setting the reference time in the microcontroller will be described.

As soon as the MCU of the electronic primer receives the blasting command from the main controller, it starts counting (Y) the internal clock of the MCU's built-in RC oscillator. Accordingly, the timer operation of the MCU is increased by 1 ms, which is a reference time when the count value Y is equal to the second registry value in which a counter value defining a value of 1 ms, which is a reference time of the built-in RC oscillator, is the same. .

After that, if the time measured by the timer and the pre-stored in the nonvolatile storage means of the MCU coincides with the set delay time, the shunt is released and the primer is triggered by the blasting command.

In other words, by using the reference time setting method in the microcontroller of the present invention, the electronic primer has a practical correction algorithm that can significantly reduce the communication error while communicating at a relatively high speed without using a separate communication driver circuit as the firmware of the MCU. Doing.

Although the method for setting the reference time in the microcontroller of the present invention has been described as an embodiment of the electronic primer, the present invention may be modified and modified in various ways without departing from the technical scope of the present invention.

Hereinafter, an electronic primer by a method of setting a reference time in the microcontroller will be described.

2 is an electronic primer block diagram using a reference time setting method in the MCU of the present invention, Figure 3 is a detailed circuit diagram. 2 and 3 will be described together.

2 and 3, the electronic primer control means 200 using the reference time setting method in the MCU of the present invention is a rectifier circuit 210, voltage divider circuit 220, transmission circuit 230, power storage circuit ( 240, the blast energy storage circuit 250, the MCU 260, the switch circuit 270, and the shunt circuit 280.

The power supply rectifies the signal source received from the main controller 100 using the rectifier circuit 210 composed of the bridge diode BD1, and divides the voltage into resistors R1 and R2 connected to the output of the rectifier circuit 210. The circuit accumulates in the power storage circuit 240 and the blast energy storage circuit 250.

According to the voltage divided by R1 and R2, the power storage circuit 240 connects R4, the diode D2, and the capacitor EC2 in series to accumulate charge in the capacitor EC2, and to execute the zener diode ZD1 in parallel with the capacitor EC2. The power is supplied to the microcontroller by connecting to maintain a constant voltage. Where R10 is a protection resistor against overvoltage supplied to the MCU.

In the blast energy storage circuit 250, R3, the diode D1, and the capacitor EC1 are connected in series according to the voltage divided by R1 and R2 to accumulate charge in the capacitor EC1. Then, when the switching circuit is short-circuited by the MCU 260 control, the charge accumulated in the EC1 is supplied to the primer fuse head to trigger the primer.

Therefore, the blasting energy storage circuit 250 and the power storage circuit 240 for supplying power to the MCU for the primer control are configured together for the detonator requiring a high output therein. In this case, R3 and R4 are integral resistors for preventing the charging current from rising sharply.

The shunt circuit 280 is connected between the switching circuit 270 and the primer 300, the transistor Q4 and the transistor Q5 is short-circuited from the time when charge begins to accumulate in the blasting energy storage circuit 250, the both ends of the primer Grounded to protect the primer from sudden electrical shocks from the outside. At the time of blasting, the transistor Q5 is opened, so that the transistor Q4 is also opened to release the shunt operation.

The switching circuit 270 is short-circuited by the control of the MCU after an explosion delay time by the blasting command of the main control device 100, the transistor Q3 is short-circuited to the blast energy storage circuit 250 at both ends of the primer fuse head. It releases the accumulated charge rapidly and triggers the primer.

The transmitting circuit 230 performs communication between the MCU and the main controller according to a command to transmit a set value for the primer installation state for the connection state and the detonation time setting state of the primer of the main controller.

Here, the received serial signal of the main controller divided into voltages by R1 and R2 may cause communication speed delay and communication waveform distortion due to changes in inductance component due to communication line shape, line length, and temperature. However, the present invention analyzes a preamble, which is a method of setting a reference time in a microcontroller, and defines a counter value (1 second) in which the coefficient of the oscillation clock by the built-in RC oscillator of each MCU defines a reference time at a current temperature and voltage. The oscillation clock counter value (stored in the third registry) by the MCU's built-in RC oscillator that defines the 1-bit width divided by the total number of standard pulses of the preamble). Can be.

As shown in FIG. 4A, the transmitting circuit 230 forms a pulse width with a value stored in the third registry to switch the transistor Q1 according to the value stored in the nonvolatile storage means to high or low (L). By outputting a signal, the state of connection of the primer and the setting of the delay delay time set in the nonvolatile storage means are transmitted to the main controller. When transistor Q1 is turned on, the transmission operation is started by changing the voltage between R5 and RT of the main controller (see Fig. 4B).

In addition, as shown in FIG. 4B, the main controller 100 prepares the reception of data from the electronic primer control means 200 by opening the transistor QT1 state and flowing current only at RT after transmitting data to the electronic primer control means.

Each electronic primer can be given a unique address (ID of each primer) in advance.

First, each primer receives a data frame including a preamble from the main controller. Each primer analyzes the preamble received from the main controller and stores a counter value defining 1 ms as a reference time in the second registry, and stores a counter value defining pulse width of 1 bit in the third registry (S100). Since the detailed description is described in the reference time setting method (see FIG. 1) in the microcontroller, the description thereof will be omitted.

Then, each primer extracts the command received from the main controller and triggers the command (S200). The MCU of the electronic primer receives the blasting command from the main controller and starts counting (Y) the internal clock of the MCU's built-in RC oscillator. . Accordingly, the timer operation of the MCU is increased by 1 ms, which is a reference time when the count value Y is equal to the second registry value in which a counter value defining a value of 1 ms, which is a reference time of the built-in RC oscillator, is the same. .

After that, if the time measured by the timer and the pre-stored in the non-volatile storage means of the MCU coincides with the set delay delay time is released (S210), the primer is triggered by the blasting command (S220). The trigger (blasting) command corresponds to all primers without distinguishing the primer address.

Each primer then checks whether it is its address if it is not a triggering command (S300) and automatically terminates operation if it is not its own address. If the delay delay time setting command, the next received data is stored in the nonvolatile storage means (EEPROM) and ends (S410).

Next, each primer sends a set value stored in the nonvolatile storage means EEPROM to the main controller when the command S500 transmits the set value (S510), and ends.

The present invention has a built-in correction algorithm to improve the accuracy of the RC oscillator embedded in the MCU, and the primer installation state in the main control unit through the transmission and reception communication between the primer and the main control unit (charger or percussion) using a two-wire line (each The connection state of the primer and the setting of the detonation time) can be checked, and the reset time can be repeated by randomly clearing the detonation time of each connected detonator from the main controller.

In addition, the shunt circuit is built in to protect the primer from sudden electric shocks (electric shocks such as lightning and static electricity) from the outside. Minimized communication failure between main controllers, and up to 1500 primers can be controlled from one main controller. The connection between the primer and the main controller is 2 wire parallel and the polarity is irrelevant.

The above-described embodiments of the present invention can be written in a program that can be executed in a computer, and can be implemented in a general-purpose digital computer which operates the program using a computer-readable recording medium.

It is apparent to those skilled in the art that the present invention is not limited to the above embodiments and can be practiced in various ways without departing from the technical spirit of the present invention. will be.

Claims

In the reference time setting method for improving the accuracy of the RC oscillator embedded in the microcontroller,

Receiving a data frame including a preamble including a start pulse and a stop pulse from a main controller;

As soon as the microcontroller receiving the preamble receives the start pulse of the preamble, the microcontroller starts counting the oscillation clock by the RC oscillator built in the microcontroller and counts the count until the stop pulse of the preamble is received. Storing in a first registry of;

The reference time in the microcontroller, characterized in that the count of the oscillation clock by the built-in RC oscillator of the microcontroller comprises storing a counter value in the second registry, which defines a 1 ms reference time at the current temperature and voltage. How to set up.
The method of claim 1,

Storing the counter value of the oscillation clock by the built-in RC oscillator of the microcontroller defining a 1-bit width by dividing the value stored in the first registry by the total number of standard pulses of the preamble; Method of setting a reference time in the microcontroller, characterized in that made.
The method of claim 1,

The counter value defining 1ms, the reference time, is obtained by dividing a value obtained by multiplying the standard pulse of the preamble by a value corresponding to a predefined 1-bit time by 1ms to obtain a definite value corresponding to 1ms, which is the reference time for the standard pulse. The reference time setting method of claim 1, wherein the value stored in the first registry is obtained by dividing the value stored by the determined value.
The method of claim 1,

The timer operation of the microcontroller includes a second registry value that stores a counter value defining 1 ms, which is a reference time of the microcontroller's built-in RC oscillator, and the microcontroller's built-in control at the same time that the microcontroller receives a blasting command from the main controller. When the value of counting the internal clock of the RC oscillator is the same, the step of setting a reference time in the microcontroller, characterized in that further comprising the step of increasing by 1ms.
In the electronic primer for controlling the trigger to precisely trigger after the delay time elapsed in accordance with the command of the main control device, such as setting the blast delay time and the blast command,

Rectification circuit for rectifying the signal source received from the main controller,

A power storage circuit connected to an output of the rectifier circuit and divided by a voltage divider circuit to supply power to a microcontroller;

A blasting energy storage circuit which is divided by the voltage dividing circuit and supplies energy to the primer;

Switching circuit for supplying energy stored in the blasting energy storage circuit to the primer,

A shunt circuit connected between the switching circuit and the primer to protect the primer from a sudden electrical shock from the outside;

A transmitting circuit for transmitting primer setting information to the main controller according to the command of the main controller;

A method of setting a reference time in a microcontroller, comprising: a microcontroller operating a timer according to the method for setting a reference time in the microcontroller according to claim 1 and controlling the switching circuit after the delay time. Electronic primer using.
The method of claim 5, wherein the microcontroller

Receiving a data frame including a preamble including a start pulse and a stop pulse from a main controller;

As soon as the microcontroller receiving the preamble receives the start pulse of the preamble, the microcontroller starts counting the oscillation clock by the RC oscillator built in the microcontroller and counts the count until the stop pulse of the preamble is received. Storing in a first registry of;

Storing a counter value in a second registry in which a coefficient of an oscillation clock by a built-in RC oscillator of the microcontroller defines 1 ms, which is a reference time at a current temperature and voltage;

When receiving the blasting command from the main controller, when the second registry value and the microcontroller receives the blasting command from the main controller and the value of counting the internal clock of the built-in RC oscillator of the microcontroller is equal to 1ms which is a reference time Operating a timer to increment by increments;

Opening a shunt circuit when the time measured by the timer operation and the predetermined primer delay time coincide with the nonvolatile storage means of the primer; And

An electrical primer using a reference time setting method in a microcontroller, comprising: shorting a switching circuit and exploding a primer by rapidly releasing charge accumulated in an blasting energy storage circuit in a primer fuse head.
The method of claim 5, wherein the microcontroller

When receiving the detonator delay time setting command from the main controller,

An electronic primer using a reference time setting method in a microcontroller, characterized in that for storing the delay time value in the non-volatile storage means.
The method of claim 5, wherein the microcontroller

An electronic primer using a reference time setting method in a microcontroller, when receiving the command to transmit the delay time setting value of the primer from the main control device, transmitting the setting time of the delay time setting to the main control device.
The method of claim 8, wherein the microcontroller

Pulse width is formed by using the value stored in the third registry, which is the counter value of the oscillation clock by the built-in RC oscillator of the microcontroller, which defines the 1-bit width by dividing the value stored in the first registry by the total number of standard pulses of the preamble. Switching the transistor Q1 of the transmitting circuit and outputting a high (H) or low (L) signal to transmit the connection state of the primer to the main controller and the setting of the delay delay time set in the nonvolatile storage means to the main controller. Electronic primer using the reference time setting method in the microcontroller characterized in that.
The method of claim 5, wherein the power storage circuit is

According to the voltage divided by R1 and R2, R4, the diode D2, and the capacitor EC2 are connected in series to accumulate charge in the capacitor EC2, and the zener diode ZD1 is connected in parallel with the capacitor EC2 to maintain a constant voltage. Electronic primer using the reference time setting method in the microcontroller characterized in that to supply power to the controller.
The method of claim 5, wherein the blasting energy storage circuit

According to the voltage divided by R1 and R2, R3, the diode D1 and the capacitor EC1 is connected in series so that the charge is accumulated in the capacitor EC1 electronic primer using the reference time setting method in the microcontroller.
The method of claim 5, wherein the shunt circuit

Transistors Q4 and Q5 are short-circuited from the time when charges start to accumulate in the blasting energy storage circuit, and both ends of the primer are grounded to protect the primer from an external sudden electric shock. Electronic primer using the reference time setting method in the microcontroller, characterized in that the opening Q4.
The method of claim 5, wherein the switching circuit

When the transistor Q2 is shorted by the control of the microcontroller after the delay time due to the blasting command of the main controller, the transistor Q3 is shorted to expel the primer by rapidly releasing the charge accumulated in the blast energy storage circuit at both ends of the primer fuse head. Electronic primer using the reference time setting method in the microcontroller characterized in that.