RU2076303C1 - Signal generator for setting of electronic time fuze with inductive control circuit - Google Patents

Abstract

FIELD: devices for setting of time fuzes with an inductive control circuit. SUBSTANCE: signal generator for setting of electronic time fuze with an inductive control circuit uses first power amplifier 1, series - connected clock driver 2, counter 3, pulse length driver 4, switch 5, second power amplifier 6, transmitter windings 7 and 8. The leadout of second winding 8 is connected to the output of amplifier 1. The second output of clock driver 2 is connected to the second input of switch 5, whose second output is connected to the first input of first amplifier 1. The second input of counter 3 and N third inputs of switch 5 serve as the device first and second inputs, respectively. The device uses high-voltage pulse detection unit 9, whose input is connected to the power line, and the first and second outputs are connected to the fourth input of switch 5 and second inputs of amplifiers 1 and 6, respectively. Unit 9 may be built around a diode, capacitor, resistor, series-connected OR gate, voltage divider, comparator. EFFECT: improved design. 2 cl, 8 dwg

Description

 The invention relates to blasting, in particular to devices for installing fuses, and can be used in the installer of the signals of an electronic remote fuse (EDF) with an inductive control circuit.

Known shaper signals installation EDV, consisting of a shaper code, shaper, two power amplifiers, two windings of a transmitting device [1]
The closest in technical essence to the proposed shaper is the EDV installation signal shaper selected as a prototype, comprising a switch, a clock shaper, a counter, a duration shaper, the first and second power amplifiers, two windings of the transmitting device [2]
Under the influence of external control signals, the EDV installation signal generator generates a sequence of voltage pulses on the windings of the transmitting device (Fig. 1a, b), while the signal on the EDV receiving coil will correspond to FIG. 1c.

where T _{1 the} pulse duration of the command setting the response time equal to 8 μs;
T ₂ interval setting the response time, the value of which is in the range from 130 to 20,000 μs;
T _{3 the} duration of the command to turn on the EDV power source, equal to 800 ms;
T _{4 the} time of preparation of the EDV to receive pulses of the command to set the response time equal to 50 ms.

 The presence in the command to turn on the EDV power source of dips (pauses) of a duration not exceeding the preparation time does not lead to a failure in receiving information.

The voltage of the on-board network 27 V supplied to the first and second power amplifiers may contain voltage pulses up to 70 V and a duration of 3 ms. If the overvoltage pulse coincides with the signal shown in FIG. 1c, large instantaneous power is released in the output transistors of the first and second power amplifiers. In this case, when the current in the inductive control circuit is 10 A and the voltage value on the windings of the transmitting device is 7 V, the instantaneous power value is 630 W. If the high voltage pulses coincide with the installation pulses, the energy spent on heating the transistors will be
QP • t P • 2 • T ₁ 10.08 • 10 ^-3 W • s,
and when coinciding with the command to turn on the EDV power supply
Q 0.5 • P • T _and 0.945 W • s,
where T _{and the} pulse duration of the increased voltage.

 Thus, the release of a large amount of energy (0.945 W • s) leads to the failure of power transistors of power amplifiers.

 The technical result of the invention is to increase the reliability of the signal generator of the EDV installation with an inductive control circuit in the presence of high voltage pulses in the on-board network.

 The technical result is achieved by the fact that in the signal shaper of the EDV installation, comprising a first power amplifier, a serially connected pulse shaper, a counter, a duration shaper, a switch, a second power amplifier, the first and second windings of the transmitting device, the end of the second winding is connected to the output of the first power amplifier , the second output of the pulse shaper is connected to the second input of the switch, the second output of which is connected to the first input of the first power amplifier, In this case, the second counter input and the N third inputs of the switch are respectively the first and second inputs of the signal shaper of the EDV installation, an additional voltage pulse detection unit is introduced, the input of which is connected to the power bus, and the first and second outputs are connected respectively to the fourth input of the switch and to the second inputs first and second power amplifiers.

 The introduction of a unit for detecting high voltage pulses into the signal shaper circuit of the EDV installation provides a pause in the operation of the output transistors of the first and second power amplifiers during the formation of a command to turn on the EDV power supply in the presence of high voltage pulses in the on-board network. Thus, the reliability of the signal former of the EDV installation with an inductive control circuit is increased.

In FIG. 1 shows timing diagrams where
a) a timing diagram of the voltage on the first winding of the transmitting device;
b) a timing diagram of the voltage on the second winding of the transmitting device;
c) the timing diagram of the voltage at the receiving winding of the EDV.

 In FIG. 2 shows a block diagram of a signal driver of an EDV installation with an inductive control circuit.

 In FIG. 3 is a block diagram of an overvoltage pulse detection unit.

 In FIG. 4 shows a power amplifier; in FIG. 5 counter; in FIG. 6 - shaper duration; in FIG. 7 switch.

In FIG. 8 is a timing chart explaining the operation of the signal shaper of the EDV installation with an inductive control circuit, where
a) time diagram of the voltage of the on-board network;
b) a timing diagram of the voltage at the first output of the overvoltage pulse detecting unit;
c) a timing diagram of the voltage at the receiving winding of the EDV during the transmission of the command to turn on the power source of the EDV;
g) a timing diagram of the voltage at the second output of the overvoltage pulse detecting unit.

 The signal generator of the EDV installation with an inductive control circuit (Fig. 2) contains a first power amplifier 1, serially connected a pulse shaper 2, a counter 3, a shaper 4, a switch 5, a second power amplifier 6, windings 7 and 8 of the transmitting device. The end of the second winding 8 is connected to the output of the amplifier 1. The second output of the driver 2 is connected to the second input of the switch 5, the second output of which is connected to the first input of the first amplifier 1. The second input of the counter 3 and N of the third inputs of the switch 5 are respectively the first and second inputs of the signal conditioner EDV installations with inductive control circuit. The EDV installation signal generator with an inductive control circuit also contains an overvoltage pulse detection unit 9, the input of which is connected to the power bus, and the first and second outputs are connected respectively to the fourth input of the switch 5 and to the second inputs of amplifiers 1 and 6.

 Block 9 detection of high voltage pulses (Fig. 3) contains a diode 10, a capacitor 11, series-connected element OR 13, a voltage divider 14, a comparator 15, the output of which is the first output of block 9. The first input of the element OR 13 connected to the cathode of the diode 10 and the first terminals of the capacitor 11 and the resistor 12, is the second output of the block 9, the common terminal of which is connected to the second terminals of the capacitor 11 and the resistor 12. The second input of the OR element 13 connected to the anode of the diode 10 is the input of the block 9.

 The amplifier 1 (Fig. 4) is made on resistors 16 19 of type C2-33, transistors 20 of type 2T630B and 21 of type 2P904A, diode 22 of type 2D522B.

 Shaper 2 clock pulses consists of a generator made in accordance with [3, Fig. 14.4] and a series-connected frequency divider on the 564IE10 chip.

 Counter 3 (Fig. 5) is made on microcircuits 23 of type 564TM2, 24 of type 564IE10, 25 of type 564IP2.

 Shaper 4 duration (Fig. 6) is made on microcircuits 26 of type 564IR2, 27 of type 564TV1, 28 of type 564TM2.

 Switch 5 (Fig. 7) is implemented on microcircuits 29 of type 564LN2, 30 of type 564IE10, 31 of type 564KP2, 32 of type 564LE5, 33 of type 564KP1. Logic element 34 can be performed on type 564LA9 chips.

 The power amplifier 6 is made similarly to the amplifier 1.

As windings 7 and 8, the windings of the transmitting device are used [4]
In block 9 for detecting high voltage pulses, a diode 10 of type 2D213V, a capacitor 11 of type K50-29, a resistor 12 of type C5-42V are used.

 The OR element 13 is made on two diodes 2D522B.

 The voltage divider 14 is built on resistors of type C2-33.

 As a comparator 15 used chip type 564PU4.

 The signal generator installation EDV with an inductive control circuit (Fig. 2) works as follows. Shaper 4 and counter 3 under the influence of signals at input 2 and clock pulses at input 1 form impulses for setting the response time. These pulses, passing through the switch 5, are amplified by the power of the amplifier 6 and fed to the first winding 7 (Fig. 1A).

 After that, the switch 5 under the influence of a signal at N third inputs generates pulses at the second output. These pulses, amplified by power by the first amplifier 1, are supplied to the second winding 8 (Fig. 1b).

 Then, the switch 5 under the action of signals at the N third inputs generates on the windings 7 and 8 a command to turn on the EDV power source (Fig. 1a, b).

 After a time interval sufficient to prepare the EDF for receiving information, on the first winding 7 of the transmitting device, the pulses of the command for setting the response time of the EDF are again generated using counter 3, shaper 4, switch 5, amplifier 6.

 When an increased voltage pulse appears at the input of block 9 (Fig. 8a), the comparator 15 (Fig. 3) is triggered when the voltage at the output of the divider 14 reaches a threshold value. When the high voltage pulse coincides with the command to turn on the EDV power supply, switch 5 ensures that the amplifiers 1 and 6 form a command to turn on the EDV power supply (Fig. 8c).

 At the end of the overvoltage pulse, the capacitor 11 (Fig. 3), charged through the diode 10 to the maximum voltage value, is discharged through the resistor 12 (Fig. 8g). In this case, until it reaches the required threshold voltage (in the case under consideration, 43 V), the signal from the capacitor 11 (Fig. 3) through the OR element 13 and divider 14 holds the comparator 15 in a single state (Fig. 8b). After the comparator 15 returns to its initial state, the switch 5 continues to generate a command to turn on the EDV power supply (Fig. 8c).

Thus, when the overvoltage pulse coincides with the command to turn on the EDV power supply, the latter has a pause of duration T _P.

T _P T _I + T _CR ,
where T _{AND the} pulse duration of the increased voltage (does not exceed 3 ms);
T _CR the discharge time of the capacitor 14 until it reaches the threshold voltage value of the comparator 15 (Fig. 8g).

With the correct value of Т _CR (in our case, 5 ms), the pause duration (T _P 8 ms) is much shorter than the time for the EDF to receive the pulses of the command to set the response time (T4 50 ms) and does not violate the reception of the command by the electronic remote fuse.

Claims (2)

 1. The signal generator installation of an electronic remote fuse with an inductive control circuit, comprising a first power amplifier, a serially connected pulse shaper, a counter, a duration shaper, a switch, a second power amplifier, the first and second windings of the transmitting device, the end of the second winding is connected to the output of the first power amplifier, the second output of the pulse shaper is connected to the second input of the switch, the second output of which is connected to the first input of the first a power amplifier, wherein the second counter input and the N third inputs of the switch are respectively the first and second inputs of the signal generator of the installation of an electronically remote fuse with an inductive control circuit, characterized in that an additional voltage pulse detection unit is introduced, the input of which is connected to the power bus, and the first and second outputs are connected respectively to the fourth input of the switch and the second inputs of the first and second power amplifiers.  2. The shaper according to claim 1, characterized in that the overvoltage pulse detection unit comprises a diode, capacitor, resistor, a series-connected OR element, a voltage divider, a comparator, the output of which is the first output of the overvoltage pulse detection unit, wherein the first input of the element OR, connected to the cathode of the diode and the first terminals of the capacitor and resistor, is the second output of the overvoltage pulse detection unit, the common terminal of which is connected to the second terminals of the condenser Ator and a resistor, and the second input of the OR element connected to the anode of the diode is the input block.

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