EP0264167B1 - Sicherungssysteme - Google Patents

Sicherungssysteme Download PDF

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Publication number
EP0264167B1
EP0264167B1 EP19870304263 EP87304263A EP0264167B1 EP 0264167 B1 EP0264167 B1 EP 0264167B1 EP 19870304263 EP19870304263 EP 19870304263 EP 87304263 A EP87304263 A EP 87304263A EP 0264167 B1 EP0264167 B1 EP 0264167B1
Authority
EP
European Patent Office
Prior art keywords
actuator
capacitor
safety
drive circuit
supply means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19870304263
Other languages
English (en)
French (fr)
Other versions
EP0264167A3 (en
EP0264167A2 (de
Inventor
James British Aerospace P.L.C. Hudson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAE Systems PLC
Original Assignee
British Aerospace PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Aerospace PLC filed Critical British Aerospace PLC
Publication of EP0264167A2 publication Critical patent/EP0264167A2/de
Publication of EP0264167A3 publication Critical patent/EP0264167A3/en
Application granted granted Critical
Publication of EP0264167B1 publication Critical patent/EP0264167B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically

Definitions

  • a proposed safety and arming unit for a weapon comprises two actuators, for example piston gas motors, each operable to remove a respective lock from a shutter to allow the shutter to be withdrawn to arm the weapon. It is desirable that no single event shall arm the weapon.
  • a safety and arming unit for a weapon comprising an electrically operable actuator responsive to received electrical energy above a pre-determined threshold level, direct voltage supply means, and an actuator drive circuit connected to the actuator via a series capacitor for receiving energy from the direct voltage supply means and supplying alternating current to the actuator via the capacitor, the capacitor being incapable of storing sufficient energy to operate the actuator if charged directly from the supply means.
  • Such a safety and arming unit may include first and second actuators, respective control arrangements for said first and second actuators, each arrangement comprising a drive circuit for supplying an alternating electrical drive signal and a capacitor coupling said drive circuit to the associated actuator, each of the drive circuits being operable to deliver sufficient electrical energy to actuate the associated actuator, and each of the capacitors being incapable of storing sufficient electrical energy to actuate the associated actuator in the event of a control circuit malfunction.
  • each of said control circuits is contained in a single package.
  • This feature is of great practical significance insofar as it allows both control circuits to be formed in a single, common, custom integrated circuit, whilst still providing a high degree of safety. Should the environmental seal of the custom integrated circuit fail and both of the coupling capacitors discharge into the actuators, neither actuator would be actuated.
  • the system illustrated in the drawings is intended for use in a safety and arming unit which includes a shutter which may be moved from a "safe" position to an "armed” position in response to the occurrence of two independent events, for example predetermined levels of longitudinal acceleration and angular acceleration, and no single circumstance or fault must allow arming to occur before these events have occurred.
  • the system comprises two piston gas motors 10, 11 which are coupled to respective control circuits 12, 13 by means of capacitors 14, 15.
  • the two control circuits 12, 13 are formed on an single custom integrated circuit 16 which is contained within an environmentally sealed package.
  • the piston gas motors 10, 11 are devices which are pyrotechnically actuated in response to the supply of a sufficient level of electrical energy to withdraw a lock (not shown) from the shutter (not shown). Such devices are calibrated and have an "all fire level” which stipulates the level of energy supplied above which all devices will fire and a “no fire level” which stipulates the level of energy supplied below which no device will fire.
  • control circuits are each illustrated schematically, comprising a voltage source 17 which applies a d.c. Voltage V across two transistor switches S1 and S2 which are controlled alternately to open and close.
  • the piston gas motor 10/11 (here represented as resistance R) is coupled in series with the coupling capacitor 14/15 (here represented as capacitor C) and the resultant alternating voltage appearing between switches S1 and S2 is applied across the piston gas motor and the coupling capacitor.
  • the capacitor C would now be storing a charge energy of 1 ⁇ 2 CV2.
  • the energy transfer is given by 2 x f (1 ⁇ 2 CV2) When the frequency is above a certain limit then the energy level being transformed will be above the 'ALL FIRE LEVEL' of the piston gas motor.
  • the advantage of the described technique is that by placing coupling capacitors in series with the piston gas motor lines a short circuit within the custom integrated circuit will not fire the piston gas motors thereby making the system as safe as a discrete system or a two custom integrated circuit system.
  • the piston gas motors will only be fired when the output driver circuit of the custom integrated circuit (equivalent to S1 and S2 in Figure 2) is driven at a sufficiently high frequency.
  • This arrangement will offer considerable cost advantages to the design of safety systems and furthermore will allow volume reduction of the electronics required for a given safety standard.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Claims (4)

  1. Einrichtung zur Sicherung und zum Scharfmachen einer Waffe mit einem elektrisch betätigbaren Antrieb, der auf den Empfang elektrischer Energie über einem vorbestimmten Schwellwertpegel anspricht, mit einer Gleichsspannungsquelle und mit einer Auslöseschaltung für den Antrieb, die mit dem Antrieb über einen Reihenkondensator verbunden ist, um Energie von der Gleichspannungsquelle zu empfangen und um einen Wechselstrom den Antrieb über den Kondensator zuzuführen, wobei der Kondensator nicht in der Lage ist genügend Energie zu speichern, um dem Antrieb zu betätigen, wenn er direkt von der Spannungsquelle aufgeladen wird.
  2. Einrichtung zur Sicherung und zum Scharfmachen nach Anspruch 1, mit einem ersten und einem zweiten Antrieb, mit jeweiligen Steuereinrichtungen für den ersten und zweiten Antrieb, wobei jede Steuereinrichtung eine Antriebsschaltung aufweist, um ein elektrisches Antriebswechselsignal zuzuführen und mit einem Kondensator, der die Antriebsschaltung mit dem zugeordneten Antrieb koppelt, wobei jede Antriebsschaltung wirksam ist, um genügend elektrische Energie zu liefern, um den zugeordneten Antrieb zu betätigen und jeder der Kondensatoren außerstande ist, genügend elektrische Energie zu speichern, um den zugeordneten Antrieb im Falle einer Fehlfunktion der Antriebsschaltung zu betätigen.
  3. Einrichtung zur Sicherung und zum Scharfmachen nach Anspruch 2, bei welcher die Antriebsschaltungen in einem einzigen Pack untergebracht sind.
  4. Einrichtung zur Sicherung und zum Scharfmachen nach den Ansprüchen 2 oder 3, bei welcher jede Antriebsschaltung eine Gleichspannungsquelle und zwei Transistorschalter aufweist, die so gesteuert werden, daß sie abwechselnd öffnen und schließen.
EP19870304263 1986-05-14 1987-05-13 Sicherungssysteme Expired EP0264167B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868611799A GB8611799D0 (en) 1986-05-14 1986-05-14 Safety systems
GB8611799 1986-05-14

Publications (3)

Publication Number Publication Date
EP0264167A2 EP0264167A2 (de) 1988-04-20
EP0264167A3 EP0264167A3 (en) 1990-08-01
EP0264167B1 true EP0264167B1 (de) 1992-03-18

Family

ID=10597884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870304263 Expired EP0264167B1 (de) 1986-05-14 1987-05-13 Sicherungssysteme

Country Status (3)

Country Link
EP (1) EP0264167B1 (de)
DE (1) DE3777524D1 (de)
GB (1) GB8611799D0 (de)

Also Published As

Publication number Publication date
DE3777524D1 (de) 1992-04-23
EP0264167A3 (en) 1990-08-01
GB8611799D0 (en) 1986-11-26
EP0264167A2 (de) 1988-04-20

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