Claims
- 1. A projectile grenade launching system tester for testing a projectile grenade launching system, the tester comprising:
- jack means for receiving an electrical voltage provided by the projectile grenade launching system for launching a grenade;
- level determining means, responsive to the electrical voltage received by the jack means, for determining whether the electrical voltage is at least equal to each of a plurality of predetermined levels, the level determining means comprising a plurality of comparing means, each for comparing the electrical voltage to a corresponding one of the predetermined levels and outputting a comparison signal indicating whether the electrical voltage is at least equal to the corresponding one of the predetermined levels; and
- display means, receiving the comparison signals from the plurality of comparing means, for producing a display indicative of the comparison signals.
- 2. The projectile grenade launching system tester as in claim 1, wherein a first one of the predetermined levels is 0.5 volts.
- 3. The projectile grenade launching system tester as in claim 2, wherein a second one of the predetermined levels is 0.25 volts.
- 4. The projectile grenade launching system tester as in claim 3, wherein a third one of the predetermined levels is 0.05 volts.
- 5. The projectile grenade launching system tester as in claim 1, further comprising operation testing means for determining whether the tester is operational and for controlling the display means to produce a display indicative of whether the tester is operational.
- 6. The projectile grenade launching system tester as in claim 1, wherein each of the comparing means comprises:
- an operational amplifier receiving a first input signal indicative of the electrical voltage and a second input signal indicative of the corresponding one of the predetermined levels and outputting an amplified signal in accordance with the first and second input signals; and
- coupling means, receiving the amplified signal, for producing the comparison signal in accordance with the amplified signal.
- 7. The projectile grenade launching system tester as in claim 6, wherein:
- (a) the jack means comprises:
- (i) a jack for electrically connecting the tester to the projectile grenade launching system to receive the electrical voltage; and
- (ii) resistor means, electrically connected to the jack, for producing the first input signal for each of the operational amplifiers; and
- (b) the level determining means further comprises:
- (i) a battery; and
- (ii) resistor means, electrically connected to the battery, for producing the second input signal for each of the operational amplifiers.
- 8. The projectile grenade launching system tester as in claim 7, wherein the coupling means of each of the comparing means comprises:
- switch means for selectively completing a circuit from the battery through the display means to ground; and
- switch actuating means for controlling the switch means to complete the circuit only when the amplified signal has a positive value;
- the comparison signal being defined as a potential drop across the circuit;
- so that the comparison signal changes from zero to a non-zero value only when the amplified signal has the positive value.
- 9. The projectile grenade launching system tester as in claim 8, wherein:
- the coupling means of each of the comparing means comprises an optical coupler in which the switch means and the switch actuating means are formed; and
- the display means comprises a plurality of light-emitting diodes in one-to-one correspondence with the plurality of comparing means, each of the plurality of light-emitting diodes being a part of the circuit selectively closed by the switch means of a corresponding one of the plurality of comparing means, so as to be illuminated when the comparison signal has the non-zero value.
- 10. The projectile grenade launching system tester as in claim 9, wherein a first one of the predetermined levels is 0.5 volts.
- 11. The projectile grenade launching system tester as in claim 10, wherein a second one of the predetermined levels is 0.25 volts.
- 12. The projectile grenade launching system tester as in claim 11, wherein a third one of the predetermined levels is 0.05 volts.
- 13. The projectile grenade launching system tester as in claim 9, further comprising operation testing means for determining whether the battery outputs sufficient voltage to operate the tester and for controlling the display means to produce a display indicative of whether the tester is operational, the testing means comprising a push-button switch for selectively closing a testing circuit from the battery to the plurality of light-emitting diodes to ground.
- 14. A method of testing a grenade launching system, the method comprising:
- receiving an electrical voltage provided by the projectile grenade launching system for launching a grenade;
- determining whether the electrical voltage is at least equal to each of a plurality of predetermined levels to obtain a plurality of determination results, each of the plurality of determination results indicating whether the electrical voltage is at least equal to the corresponding one of the predetermined levels; and
- producing a display indicative of the plurality of determination results.
- 15. The method as in claim 14, wherein a first one of the predetermined levels is 0.5 volts.
- 16. The method as in claim 15, wherein a second one of the predetermined levels is 0.25 volts.
- 17. The method as in claim 16, wherein a third one of the predetermined levels is 0.05 volts.
GOVERNMENT INTEREST
The invention described herein may be manufactured, used and licensed by or for the United States Government.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
107176 |
May 1986 |
JPX |