KR20190002428U - Safety key integrated digital circuit tester and electric blasting machine having the same - Google Patents

Abstract

The present invention relates to an electric blasting machine, and in particular, it provides a digital circuit tester incorporating a safety key to operate the electric blasting machine, so that the operator does not need to carry an analog circuit tester separately, thereby providing portability and workability. The present invention relates to a safety key integrated digital circuit tester and an electric blasting apparatus having the same.

Description

SAFETY KEY INTEGRATED DIGITAL CIRCUIT TESTER AND ELECTRIC BLASTING MACHINE HAVING THE SAME}

The present invention relates to an electric blasting machine, and in particular, it provides a digital circuit tester incorporating a safety key to operate the electric blasting machine, so that the operator does not need to carry an analog circuit tester separately, thereby providing portability and workability. The present invention relates to a safety key integrated digital circuit tester and an electric blasting apparatus having the same.

In general, the electric blasting device is built with a reed switch inside the blasting machine for safety and blasts by inserting a safety key, which is a magnet key, into the safety switch insertion hole provided in the blasting machine. Is done. In addition, in order to verify whether the primer is properly connected before the blasting, the analog circuit tester is separately carried out and measured.

However, in the electric blasting apparatus according to the prior art, since an analog circuit tester must be separately provided for the safety key for ignition of the primer and the short circuit (conduction) test, it is difficult to manage, and there is a risk of loss. It was vulnerable to dustproofing, so it was easily broken and broken, which was inconvenient to carry and use.

KR 20-2017-0000348 U, Jan. 25, 2017.

Therefore, the present invention has been proposed to solve the problems of the prior art, and has the following purposes.

First, the present invention provides a digital circuit tester incorporating a safety key (magnet key) for operating an electric blasting machine, so that the operator does not have to carry an analog circuit tester separately, thereby improving portability, ease of handling and workability. An object of the present invention is to provide a safety key integrated digital circuit tester and an electric blasting device having the same.

Second, the present invention eliminates the power switch and the moving coil type meter, while simplifying its function by only shorting (conduction) inspection, and constructing only an electronic circuit to provide shock durability compared to the existing moving coil type analog circuit tester. An object of the present invention is to provide a digital circuit tester and an electric blasting device having the same.

According to an embodiment of the present invention, the short-circuit inspection circuit unit for inspecting a short circuit after the deficiency of the primer ignited through the electric blasting machine; And a short circuit that is integrally integrated with the short circuit test circuit unit and is inserted into a safety key insertion hole of the electric blasting device to operate a reed switch embedded in the electric blasting device to supply a current to the primer connected to the electric blasting device to supply the current to the primer. Including a safety key for igniting, The short-circuit inspection circuit unit, the measuring terminal is connected to the primer; A connection terminal to which a power supply voltage from a battery is supplied; A voltage divider configured to divide a power supply voltage supplied from the battery according to a resistance value of the primer when the primer is connected to the measurement terminal; A buffer switching unit operating by receiving a divided voltage distributed by the voltage divider; A microcomputer that operates by receiving a power supply voltage by the operation of the buffer switching unit, compares the divided voltage supplied through the buffer switching unit with a reference voltage, and outputs a digital signal using the built-in A / D converter. A controller unit; A resistance display unit including eight LED lamps so as to respectively display a resistance corresponding to the resistance value of the primer, and independently lighting the eight LED lamps according to the output of the microcontroller unit; And a voltage stabilizer for stabilizing and supplying a power supply voltage supplied from the battery, wherein the microcontroller unit independently turns on the eight LED lamps when the distribution voltage dropped by the distribution resistor is lower than the reference voltage. And a safety key integrated digital circuit tester for stopping driving of the eight LED lamps when the distribution voltage dropped by the distribution resistor is higher than the reference voltage.

An electric blasting device comprising the safety key integrated digital circuit tester, an output terminal for supplying a current charged in the electric blasting device to the primer; A charging micro switch turned on to charge the current supplied to the primer; A blasting micro switch which supplies a charged current to the primer through the output terminal to ignite the primer when charging is completed by the charging micro switch; An operation indicator indicating an operation state of the charging micro switch and the blasting micro switch, a discharge state of the battery, and a discharge state of the battery supplied to the electric blasting machine, wherein the operation indicator is a green LED lamp indicating a charging state; And a red LED lamp indicating the blast waiting state; A safety key insertion hole into which the safety key integrated digital circuit tester is inserted and guides the inserted safety key integrated digital circuit tester to a reed switch; A digital percentage meter displaying the charge rate of the blasting current in real time from 0 to 100%; A DC-DC converter for converting a voltage supplied from the battery to the electric blast generator into an operating voltage; And a microcontroller configured to receive an operating voltage from the DC-DC converter to control an operation of the electric blasting machine.

Here, the microcontroller charges the blasting current in response to the operation signals of the reed switch, the charging microswitch and the blasting microswitch, and displays each operation state through the operation indicator, and the charging rate of the blasting current May be controlled to be displayed through the digital percentage meter.

As described above, according to the present invention, the following effects can be obtained.

First, according to the present invention, by providing a digital circuit tester incorporating a safety key (magnet key) for operating an electric blasting machine, the operator does not need to carry an analog circuit tester separately, thereby improving portability, ease of handling and workability. You can.

Secondly, according to the present invention, the digital circuit tester integrated with a safety key removes the power switch and the moving coil type meter provided in the analog circuit tester, and simplifies the structure by simplifying its function only with a short circuit (conduction) test. It is possible to improve the shock durability compared to the existing moving coil type analog circuit tester by configuring only the electronic circuit.

1 is a view showing for explaining an electric blasting apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating the configuration of the electric blast shown in FIG.
3 is a conceptual view illustrating a safety key integrated digital circuit tester according to an embodiment of the present invention;
4 is a front view of the integrated digital circuit tester shown in FIG.
FIG. 5 shows a rear view of the integrated digital circuit tester shown in FIG. 3. FIG.
FIG. 6 is a circuit connection diagram for explaining the short circuit check circuit unit shown in FIG. 4; FIG.

Advantages and features of the present invention, and methods of achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms.

In the present specification, the embodiments of the present invention are provided so that the disclosure of the present invention may be completed, and a person of ordinary skill in the art may completely inform the scope of the present invention. And the present invention is only defined by the scope of the claims. Thus, in some embodiments, well known components, well known operations and well known techniques are not described in detail in order to avoid obscuring the present invention.

Also, like reference numerals refer to like elements throughout. In addition, the terms used (discussed) herein are for the purpose of describing the embodiments are not intended to limit the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. In addition, components and operations referred to as 'includes (or includes)' do not exclude the presence or addition of one or more other components and operations.

Unless otherwise defined, all terms used in the present specification (including technical and scientific terms) may be used as meanings that can be commonly understood by those skilled in the art. Also, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are defined.

Hereinafter, technical features of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view illustrating an electric blasting apparatus according to an embodiment of the present invention, Figure 2 is a block diagram showing for explaining the configuration of the electric blasting apparatus shown in FIG.

1 and 2, the electric blasting apparatus 10 according to the embodiment of the present invention is basically an output terminal 11, the operation (charge / blasting / battery) indicator 12, the charging micro switch 13 ), Blast micro switch 14, safety key insert (safety switch hole) 15, digital percent meter 16, DC-DC converter 17, microcontroller unit 18 and reed switch 19 do.

The output terminal 11 is connected to a primer (not shown) and supplies a strong current charged in the electric blaster 10 to the electric primer through the blasting circuit of the electric blaster 10.

The operation indicator 12 indicates the operation state of the charging micro switch 13 and the blasting micro switch 14, and indicates the discharge state of the battery supplied to the electric blasting machine 10. Such an operation indicator 12 may include a green light (charging light) and a red light (blasting waiting light) as an LED lamp.

The charging micro switch 13 is a charging switch for charging the current supplied to the primer, and when the charging micro switch 13 is pressed, that is, turned on, charging is performed.

When the blasting micro switch 14 completes the charging by the charging micro switch 13, the blasting micro switch 14 supplies a strong current to the primer through the output terminal 11 to ignite the primer.

The safety key insertion hole 15 is a safety switch hole, where a digital circuit tester 20 with a built-in magnet key is inserted, and guides the inserted digital circuit tester 20 to the built-in reed switch 19.

The digital percentage meter 16 displays the charge rate of the blast current from 0 to 100% in real time.

The DC-DC converter 17 converts the voltage supplied from the battery to the electric blast device 10 into the operating voltage of the microcontroller unit 18 and supplies it to the microcontroller unit 18.

As illustrated in FIG. 2, the microcontroller unit 18 receives power from the DC-DC converter 17 to control the overall operation of the electric blasting machine 10 according to a program. That is, the blasting current is charged in response to the operation signals of the reed switch 19, the charging micro switch 13, and the blasting micro switch 14, while each operation state is displayed through the operation indicator 12, and The charge rate of the blast current is displayed through the digital percentage meter 16.

This electric blasting machine 10 is controlled in accordance with the programming of all the operations registered in the microcontroller unit 18, each operation process is displayed via the operation indicator (12). In addition, the charging rate is displayed as 0 to 100% through the digital percentage meter 16 to set the standard, and to design a contactless digital circuit to eliminate the disadvantage of the contact type blasting switch, the blasting is always performed under the same conditions. Can provide output In addition, when the battery falls below the reference voltage, the battery lamp of the operation indicator 12 is lit to provide a battery replacement time.

The operating characteristics of the electric blasting apparatus 10 including such a configuration will be briefly described.

First, when the digital circuit tester 20 having the safety key integrated is inserted into the safety key insertion hole 15 and then the charging micro switch 14 is pressed, the green light (charger) of the operation indicators 12 lights up and the digital percent The filling rate is displayed on the meter 16. After (after a few seconds), when charging is complete, the access indicator 12 will flash from green to red (READY TO FIRE) and the digital percent meter (16) will display 100% charge rate. It will be displayed, the buzzer will sound, and it will tell you that it is fully charged. After confirming the full charge, pressing the blasting micro switch 14 while pressing the charging micro switch 13, a strong current flows in the blasting circuit connected through the output terminal 11 to ignite the connected primer.

3 is a conceptual view illustrating a safety key integrated digital circuit tester according to an embodiment of the present invention, FIG. 4 is a front view of the integrated digital circuit tester illustrated in FIG. 3, and FIG. 5 is a view of FIG. 3. The rear side of the integrated digital circuit tester shown in FIG.

3 and 5, the safety key integrated digital circuit tester 20 according to the embodiment of the present invention is a safety key 2 for operating the electric blast 10 is integrated with the circuit tester (1). In addition, by eliminating the power switch and the mood coil type meter, the function is simplified by the short circuit (conduction) test to simplify the structure, and the electronic circuit is composed only to greatly improve the impact durability compared to the existing moving coil type analog circuit tester. I was.

The safety key-integrated digital tester 20 includes a short-circuit inspection circuit 21 and a safety key 22, which is a magnetic key, embedded in one side thereof, and includes a probe (lead wire) connected to the measurement terminal.

The short circuit test circuit 21 is digitized by using an electronic circuit instead of a moving coil for verifying that the electrical primer is normally connected using the probe.

FIG. 6 is a circuit connection diagram illustrating the short circuit check circuit unit shown in FIG. 4.

4 and 6, the short circuit check circuit unit 21 includes a microcontroller unit 211 (MCU), a voltage divider 212, and a buffer switching unit 213 to check a short circuit of a primer to be measured. And a resistance display unit 214. In addition, the short circuit checker circuit 21 may further include a voltage stabilizer 215 for stabilizing and supplying power from a battery.

The voltage divider 212 distributes the power supply voltage supplied from the battery according to the resistance value of the electric primer to be measured. When the probe connected to the measurement terminal is connected to a primer of 0 to 1000?, The power supply voltage supplied from the battery is distributed by the voltage distribution resistor R4.

As illustrated in FIG. 6, the buffer switching unit 213 operates by receiving a divided voltage distributed by the voltage divider 212 to supply a battery voltage to the microcontroller unit 211. The buffer switching unit 213 operates by the divided voltage distributed through the voltage divider 212 and the MOSFET Q1 serving as a buffer, and switches by the operation of the MOSFET Q1 to switch the divided voltage to the microcontroller unit. And a switching transistor Q2 for supplying to 211. In this case, the reason why the MOSFET Q1 is used as the buffer in the buffer switching unit 213 is to not affect the divided voltage for A / D conversion when driving the base of the switching transistor Q2.

The microcontroller unit 211 compares the divided voltage supplied through the buffer switching unit 213 with a reference voltage, and outputs a digital signal using the built-in A / D converter according to the output port PD0 to PD7. It outputs through to drive the LED lamp of the resistance display unit 214.

The resistance display unit 214 is composed of, for example, eight LED lamps LED1 to LED8 to display the resistance corresponding to the resistance value of the primer, and the LED lamps LED1 to LED8 are connected to the output of the microcontroller unit 211. Independently lit according to the minute resistance value of the electric primer can be measured.

The operation characteristics of the short circuit check circuit section 21 having such a configuration will be briefly described.

When the primer is connected to the measurement terminals J1 and J2, the power supply voltage supplied through the connection terminals J3 and J4 is distributed through the primer having a constant resistance value with the resistance R4 of the voltage divider 212.

The distribution voltage thus distributed is applied to the gate of the MOSFET Q1 of the buffer switching unit 213 to operate the MOSFET Q1, and thus the switching transistor Q2 through the resistor R3 connected to the drain of the MOSFET Q1. ) Is grounded so that the switching transistor Q2 is operated so that the divided voltage distributed through the voltage divider 212 is supplied to the microcontroller unit 211.

The microcontroller unit 211 receives the divided voltage and compares it with the reference voltage, and digitizes the result value corresponding to the result through the A / C converter and outputs it to the resistance display unit 215.

For example, if the resistance value of the electric primer installed in the outside is low enough for blasting, the distribution voltage dropped by the distribution resistor R4 becomes lower than the reference voltage, so that the A / D of the microcontroller unit 211 is reduced. The output value output through the converter is in the "L" state so that the LED lamps LED1 to LED8 of the resistance display unit 215 are turned on to drive a buzzer (not shown).

If the wiring of the electric primer installed externally is shorted, or if the distribution voltage dropped by the distribution resistor R4 is higher than the necessary enough resistance value, the output value of the A / D converter is maintained at "H" and the resistance is maintained. The LED lamps LED1 to LED8 and the buzzer of the display unit 215 are not driven.

On the other hand, when the external electric primer is separated from the measuring terminals J1 and J2, the voltage of the distribution resistor R4 becomes '0V' so that the MOSFET Q1 and the switching transistor Q2 are turned off. The power supplied to the microcontroller unit 211 is cut off, and the operation of the short-circuit check circuit unit 21 is automatically stopped.

As described above, the technical idea of the present invention has been described in detail in the preferred embodiments, but the above-described preferred embodiments are for the purpose of description and not of limitation. Therefore, those skilled in the art will understand that various embodiments are possible through the combination of the embodiments of the present invention within the scope of the technical idea of the present invention.

10: electric blasting machine 11: output terminal
12: activity indicator 13: charging micro switch
14: blast micro switch 15: safety key insert
16 digital percent meter 17 DC-DC converter
18: microcontroller unit 19: reed switch
20: digital circuit tester 21: short circuit check circuit
22: security key (magnet key) 211: microcontroller unit
212: voltage divider 213: buffer switching unit
214: resistance display unit 215: power stabilization unit

Claims (3)

A short circuit inspection circuit unit for inspecting a short circuit after a deficiency of a primer ignited through an electric blasting machine; And
It is integrated with the short circuit test circuit unit, is inserted into the safety key insertion port of the electric blasting device to operate the reed switch embedded in the electric blasting device to supply a current to the primer connected to the electric blasting device to supply the primer Include a safety key to ignite,
The short circuit check circuit unit,
A measuring terminal to which the primer is connected;
A connection terminal to which a power supply voltage from a battery is supplied;
A voltage divider configured to divide a power supply voltage supplied from the battery according to a resistance value of the primer when the primer is connected to the measurement terminal;
A buffer switching unit operating by receiving a divided voltage distributed by the voltage divider;
A microcomputer that operates by receiving a power supply voltage by the operation of the buffer switching unit, compares the divided voltage supplied through the buffer switching unit with a reference voltage, and outputs a digital signal using the built-in A / D converter. A controller unit;
A resistance display unit including eight LED lamps so as to respectively display a resistance corresponding to the resistance value of the primer, and independently lighting the eight LED lamps according to the output of the microcontroller unit; And
It includes a voltage stabilizer for stabilizing and supplying the power supply voltage supplied from the battery,
The microcontroller unit,
The eight LED lamps are independently turned on when the distribution voltage dropped by the distribution resistor is lower than the reference voltage. When the distribution voltage dropped by the distribution resistor is higher than the reference voltage, the eight LED lamps are driven. Stopping
Safety key integrated digital circuit tester.
An electric blasting device comprising the safety key integrated digital circuit tester according to claim 1.
The method of claim 2,
An output terminal for supplying a current charged in the electric blaster to the primer;
A charging micro switch turned on to charge the current supplied to the primer;
A blasting micro switch which supplies a charged current to the primer through the output terminal to ignite the primer when charging is completed by the charging micro switch;
An operation indicator indicating an operation state of the charging micro switch and the blasting micro switch, a discharge state of the battery, and a discharge state of the battery supplied to the electric blasting machine, wherein the operation indicator is a green LED lamp indicating a charging state; And a red LED lamp indicating the blast waiting state;
A safety key insertion hole into which the safety key integrated digital circuit tester is inserted and guides the inserted safety key integrated digital circuit tester to a reed switch;
A digital percentage meter that displays in real time the charge rate of the blasting current from 0 to 100%;
A DC-DC converter for converting a voltage supplied from the battery to the electric blast generator into an operating voltage; And
A microcontroller configured to receive an operating voltage from the DC-DC converter to control an operation of the electric blasting machine;
Electric blasters.

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