JPS6214760B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric time fuse suitable for use in projectiles such as artillery shells.

Generally, fuzes for projectiles such as artillery shells are filled with pyrotechnics, so it is not possible to incorporate a battery that continues to supply power to an electric timer mechanism that includes electronic circuits for oscillation, frequency division, etc. that perform timed operations. Undesirable. Therefore, conventionally, a so-called reserve power source is used to start supplying power to the electronic circuit by utilizing the physical force at the time of launch, such as the launch impact or rotation, and this is used to start supplying power to the electronic circuit after launch. There are electric time fuzes that have an electric time mechanism that operates on a timed basis.

However, according to this conventional example, it is expensive because it requires a separate reserved power source, and it also has a time limit due to the rise time of the reserved power source and the time it takes for the oscillation frequency of the oscillation circuit to reach a certain time. This method has the disadvantage of causing large errors and poor timing accuracy.

On the other hand, conventionally, in order to improve the timing accuracy,
A mechanical/electrical time fuze has been proposed in which a mechanical timer mechanism and an electric timer mechanism are combined, the former compensates for the rise time of the power supply, and power is supplied to the latter after the timed operation.

However, according to this conventional example, since a separate mechanical timer mechanism is also incorporated, the overall structure becomes large and complicated, and moreover, it becomes expensive.

Therefore, an object of the present invention is to solve such conventional problems and provide an electric time fuze that has a simple structure, is inexpensive, and has high timing accuracy without incorporating a reserved power source or a mechanical time mechanism. There is a particular thing.

In order to achieve this object, the present invention provides an electric time fuze equipped with an electric time mechanism including electronic circuits such as oscillation, frequency division, counting, and a ignition circuit for igniting an electric detonator, which performs a timed operation when electric power is supplied. , the electric timer mechanism includes, in addition to a power supply capacitor that supplies power to the electronic circuit, an ignition capacitor that supplies power only to the ignition circuit after firing, and a firing switch mechanism that is activated by an external force during firing.
a firing detection circuit connected to the firing switch mechanism and outputting a firing detection signal based on the operation of the firing switch mechanism after firing and activating the frequency dividing circuit; and an ignition energy charging control circuit that sends electrical energy to the ignition capacitor in accordance with the ignition capacitor.

The features of the invention will become clearer from the following description of the illustrated embodiments.

FIG. 1 is a schematic configuration diagram showing the overall configuration of an electric time fuse according to the present invention. In the figure, reference numeral 1 indicates a container body, and inside the container body there are an electric time limit mechanism 2, a power supply capacitor 3, A safety mechanism 4 and an explosive charge 5 are built-in.

FIG. 2 is a block diagram showing the electrical configuration of the time fuse according to the present invention. The power supply capacitor 3 is charged from the outside via an electric time fuse measuring device 6 for measuring the time limit, and is made of a large capacity capacitor using, for example, an electric double layer.
A connector 7 for connection to a measuring device 6 is provided at the tip of the device body 1. Furthermore, the power supply capacitor 3 is connected to the electronic circuit 8 of the electric timer 2,
As a result, power is supplied to the electronic circuit 8 via the power supply capacitor 3.

The electric timer 2 comprises, in addition to an electronic circuit 8, a firing detection circuit 16 and a firing capacitor 10, each connected to the electronic circuit.

The electronic circuit 8 includes an oscillation circuit 11 that is composed of a C-MOS inverter, a crystal resonator, etc., and outputs an oscillation waveform that is a time standard, and a frequency division circuit 12 that divides the frequency from this oscillation circuit into a required frequency. , is connected to a counting circuit 13 that stores measured seconds data from the measuring device 6, that is, the fuse activation time, and an electric detonator 14, and ignites the electric detonator 14 by outputting a predetermined firing signal from the counting circuit 13. ignition circuit 15.

Further, the electric timer mechanism 2 incorporates a firing switch mechanism 9 that is activated by an external force when a flying object (not shown) is fired. A launch detection circuit 16 is connected to the launch switch mechanism, whereby when a projectile is launched, the launch switch mechanism 9 is activated.
Based on the operation, a firing detection signal is output from the firing detection circuit 16.

The firing detection circuit 16 is connected to a firing capacitor charging control circuit 17 connected to the power supply capacitor 3, and outputs a firing detection signal to the control circuit.
The ignition capacitor 10 is connected between the ignition capacitor charging control circuit 17 and the ignition circuit 15 and supplies the electrical energy from the power supply capacitor 3 to the ignition circuit through the current limiting resistor of the ignition capacitor charging control circuit 17. .

Next, the operation of the electric time fuze according to the present invention will be explained.

First, before launch, the power supply capacitor 3 is charged by an external power supply via the measuring device 6, and thereby power is supplied to the electronic circuit 8. By supplying this power, an oscillation waveform is output from the oscillation circuit 11, and the measured second time data is transferred from the measuring device 6 to the counting circuit 13 through the cable, and the measured second time data, that is, is transferred by the power supply capacitor 3. The fuse activation time is memorized and then fired.

After firing, the firing detection circuit 16 operates based on the firing switch mechanism 9 which is activated when an external force is applied during the firing and outputs the firing detection signal, which causes the frequency dividing circuit 12 to operate and output the oscillation signal. is divided by an arbitrary frequency division ratio and output, and is input to the counting circuit 13, which starts counting.

On the other hand, the firing detection signal from the firing detection circuit 16 is input to the gate of a so-called thyristor in the ignition capacitor charging control circuit 17, and the thyristor is activated.
The power supply capacitor 3 is turned on, and electrical energy is supplied from the power supply capacitor 3 to the ignition capacitor 10 via the current-limiting resistor of the ignition capacitor charging control circuit 17. At the same time, when the counting circuit counts the frequency-divided signal by the fuse activation time, the firing circuit 1
A firing signal is output to 5. When this ignition signal is input to the gate of the thyristor in the ignition circuit 15, the thyristor is turned on, and the charge energy of the ignition capacitor 10 is supplied to the electric detonator 14. As a result, the electric detonator 14 is ignited, and the booster explosive 5 is ignited through the safety mechanism 4.

According to the present invention, power is supplied to the ignition circuit via the ignition capacitor based on the ignition capacitor charging control circuit, and there is no need for a separate reserved power source, and there is no need to incorporate a so-called mechanical timer mechanism.
It is possible to provide an electric time fuse that is extremely simple in construction and inexpensive.

According to the present invention, there is no need to consider the rise time of a reserved power source or the start time of an oscillation waveform, which affect time accuracy, and therefore it is possible to provide an electric time fuze with extremely high accuracy.

Further, according to the present invention, based on the firing switch mechanism and the firing detection circuit, power is not supplied to the firing circuit until after firing, so it is possible to provide an electric time fuze with high safety.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the overall configuration of an electric time fuse according to the present invention, and FIG. 2 is a block diagram showing the electrical configuration of the electric time fuse according to the present invention. 2... Electric time limit mechanism, 3... Power supply capacitor, 8... Electronic circuit, 9... Firing switch mechanism,
10... Ignition capacitor, 11... Oscillation circuit,
12... Frequency dividing circuit, 13... Counting circuit, 15...
Firing circuit, 16... Firing detection circuit, 17... Firing capacitor charging control circuit.

Claims (1)

[Claims] 1. In an electric time fuze equipped with an electric time mechanism including electronic circuits such as oscillation, frequency division, counting, and ignition circuits for igniting an electric detonator, which perform a timed operation when electric power is supplied, the electric time mechanism In addition to the power supply capacitor that supplies power to the circuit, there is also a firing capacitor that supplies power only to the firing circuit after firing, a firing switch mechanism that is activated by an external force during firing, and a firing switch mechanism that is connected to the firing switch mechanism and that a firing detection circuit that later outputs a firing detection signal based on the operation of the firing switch mechanism and activates the frequency dividing circuit; an electric time fuze comprising an ignition energy charging control circuit that transmits ignition energy;