DE3013462C2 - Circuit arrangement for safety circuits - Google Patents

Description

The invention relates to an arrangement for a safety circuit with at least two signal inputs in the firing circuit on an ammunition and in which the unlocking takes place via two different ones Criteria takes place in a selectable time specification.

Such arrangements are known for example from US-PS 34 17 700 and US-PS 37 50 583. In the latter case, the launch acceleration and the rotation acceleration are separated as two different criteria are used for the arming of a safety circuit. in the The first-mentioned case is the exit from the launch tube and the occurrence or occurrence of the trigger criteria. Reaching a certain acceleration force used.

The present invention is based on the object to bring about such an improvement in an arrangement of the type mentioned that the previously required mechanical devices with the associated sealing and tolerance problems are omitted and the mechanical linch pins are unnecessary and the proposed principle is more versatile to make usable.

The characterizing features of the claim make this task easier and more reliable Way solved. An example of an implementation is dealt with in the description and in the drawing shown schematically in the form of a block diagram etc. It shows

1 shows a general block diagram;

ίο Fig. 2 is a block diagram based on a special embodiment a bomb lock;

F i g. 3 shows a circuit arrangement of the embodiment according to FIG. 2.

The starting point of the present safety switch

The function function is the launching of a projectile, dropping a bomb or mine, or the impetus for this. This impulse is hereinafter referred to as "conscious" impulse 1 are designated. It has an amplitude of 2 and a duration of 3 and arrives via an input filter 4 an impedance converter 5, which amplifies the signal accordingly for further processing, under certain circumstances also reduces or attenuates, which depends on the values of the subsequent electronic components. This "conscious" impulse can now be:

the electrical impulse for starting the gas generator, which then also provides the power supply perform ·, or the electrical ignition pulse for the engine or engines, but also the ignition pulse for the Ejection cartridge in a bomb lock, or some other definable signal for the "conscious" departure a fighting body.

The impedance converter 5 is followed by a comparator 6 which generates the "conscious" electrical impulse 1 its minimum amplitudes are assessed, but also the assessment with regard to its maximum level and the Time duration or also on the temporal course of the amplitude makes when these quantities from the electrical Launch signal are defined as indicative and significant. Now these values are related to the minimum and / or maximum amplitude, the duration itself and / or the voltage or Sirom curve accordingly the tolerance limits of the desired values, the time delay device is triggered 7. which after a period of time ii a monoflop 8 controls, which now emits an output pulse with the duration fj to an UN D element 9.

Simultaneously with the departure of the projectile, missile, etc., a so-called contact or Separation sensor 10 acted upon. For this sensor

different configurations are conceivable, once as only single-pole, galvanic contact, such as a ground contact, or a pressure switch, the one Circuit closes or opens. However, so-called non-contact, magnetic or capacitive ones are preferred Contact sensors. These electronic sensors can easily have air gaps of many millimeters bridge and have the essential advantage that they alone are much better at dealing with military environmental pollution, signs of corrosion and the effects of aging.

bo are as galvanic contacts or even mechanical Pressure switch. Of course, any other form of contact and near-range sensors are available can also be used.

The signal of the contact or failure sensor 10

hi etc. is now in an amplifier 11. which is also a signal processing device can be, reinforced or processed. This signal is now given to a monoflop 12, whose output pulse in turn goes to the AND

Link 9 is entered.

It is now essential that the AND element 9 passes the pulse on to the pulse device 13 only when the signal of the monoflop output 12 falls within a line range greater than fi - and less than the time ti + t2 -. The time range i, djreh is given by the delay device 7 and the time fi + / 2 by the delay device 7 and the duration of the pulse of the monoflop 8.

The pulse device 13 in turn controls various criteria necessary for security, e.g. B. to drive a motor or an electromagnet, or both together or to control electro-explosives Elements;:, which in turn cancel safety interlocks or directly safety links release. But also electronic safety devices that form a so-called safety chain, can be controlled with the pulse device. Often the battery is activated first in a missile and only when the battery voltage is present, the launch signal 1 is given in the missile. In In this case, the proper activation of the battery as an internal power supply is also included in the Safety circuit of the entire safety circuit. The arrows shown in Fig. 1 to the individual Blocks show that the internal power supply required for this module is an additional input criterion is given for the safety arrangement.

But also through an external power supply on the one hand and the use of the ignition pulse on the other for the activatable battery, connected to the contact or disconnection sensor signal, the proposed Securing a safety circuit alone can be achieved.

The F i g. 2 shows a simplified one in a schematic representation Embodiment of the invention in a safety circuit for a bomb lock of aircraft. Due to the above and the labeling of the individual elements used in the Figure, a repetition of the description of the functional process should be superfluous, as well as for the Block diagram of this exemplary embodiment, which is shown in FIG. 3 is shown.

The versatility of the proposed system has already been addressed and through the example on a bomb lock according to FIGS. 2 and 3 have been shown. With clever attachment of the contact sensor in the proposed embodiment as a non-contact contact sensor, this principle can be used in so a variety of different platforms, such as contact-launchers, etc. used will.

For this purpose 3 sheets of drawings

Claims (6)

Patent claims: 1. Arrangement for a safety circuit with at least two signal inputs in the ignition circuit an ammunition and in which the release is based on two different criteria in one selectable time setting, characterized in that a first signal input (1) for a signal initiating activation via a filter (4) and an impedance converter (5) with one first monoflop (8) is connected, the output of which is applied to an input of the logic element (9) and that a second signal input as a signaling the departure of the bomb or the projectile Contact sensor (10) is designed, which via a downstream amplifier (11) on a second monoflop (12) is present, the output of which is connected to a second input of the logic element (9) is switched and the logic element (9) is connected to a further safety or ignition circuit Pulse generator (13) is connected downstream. 2. Arrangement according to claim 1, characterized in that that the separation sensor is a contactless sensor in a manner known per se. 3. Arrangement according to claims 1 and 2, characterized in that between the filter (4) and a time delay element (7) is inserted into the monoflop (8). 4. Arrangement according to claims 1 to 3, characterized in that the first monoflop (8 ) emits an output pulse with a certain period of time (t _2). 5. Arrangement according to one or more of claims 1 to 4, characterized in that the logic element (AND-Giied) (9) the signal of the monoflop output (12) only when its position within a time range greater than /, and less than fi + h to the pulse device (13). 6. Arrangement according to one or more of claims 1 to 5, characterized in that according to a comparator (6) is inserted into the impedance converter (5).