Strobe flash monitor

• US 4,701,672 A
• Filed: 05/28/1985
• Issued: 10/20/1987
• Est. Priority Date: 05/28/1985
• Status: Expired due to Fees

• Current Assignee: Tomar Electronics Incorporated
• Original Assignee: Tomar Electronics Incorporated
• Inventors: Sikora, Scott T.
• Primary Examiner(s): Boudreau, Leo H.
• Assistant Examiner(s): Razavi, Michael
• Application Number:
  US06/737,797
• Time in Patent Office: 875 Days
• Field of Search: 315/241 P, 315/241 S, 315/129, 315/307, 315/308, 315/224, 315/225, 315/299, 340/641, 340/643, 340/657
• US Class Current: 315/241.00S
• CPC Class Codes: H05B 41/34 to provide a sequence of flashes

Abstract

The operation of a strobe lighting system is electronically monitored from a remote location to verify proper operation of all of the individual elements of the system. A current sensor is coupled in series with the flow of current between the strobe power supply and the strobe lamp and generates a voltage pulse in response to each flash inducing pulse of current through the strobe lamp. A remote indicator is coupled to the current sensor and generates a humanly perceptible output signal (visual or audible) in response to the voltage pulse from the current sensor. The strobe flash monitor enables a strobe lighting system user to continuously monitor system operation without direct observation of the strobe lamp flashes.

Claims

1. Apparatus for electronically monitoring the emission of optical flashes by a strobe lamp from a remote location spaced apart from said strobe lamp comprising:

a. a strobe power supply for causing a strobe lamp to emit an optical flash by periodically discharging an energy storage capacitor through said strobe lamp to direct a capacitor discharge current pulse through said strobe lamp;

b. current sensor means coupled in series with the flow of the capacitor discharge current pulse through said strobe lamp for generating an output voltage corresponding to the flow of the capacitor discharge current pulse through said strobe lamp and to the emission of an optical flash by said strobe lamp; and

c. remote indicator means spaced apart from said strobe lamp and coupled to said current sensor means for generating a humanly perceptible output signal in response to the output voltage from said current sensor means to enable a strobe system user to continuously monitor the emission of optical flashes by said strobe lamp without visually observing said strobe lamp.

2. The strobe lamp monitoring apparatus of claim 1 wherein said strobe lamp is positioned in a first location and said strobe power supply is positioned in a second location spaced apart from said first location.

3. The strobe lamp monitoring apparatus of claim 1 wherein said remote indicator means is positioned in a third location spaced apart from said first and second locations;

4. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means is positioned at a fourth location spaced apart from said first, second and third locations.

5. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means is colocated with said strobe power supply.

6. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means is colocated with said strobe lamp.

7. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means includes diode means for generating a voltage pulse in response to the flow of current from said power supply through said strobe lamp.

8. The strobe lamp monitoring apparatus of claim 7 wherein said current sensor means includes means for sensing each voltage pulse and generating a corresponding humanly perceptible output signal.

9. The strobe lamp monitoring apparatus of claim 8 wherein said voltage sensing means includes:

a. an optoisolator for generating an output current in response to each voltage pulse; and

b. flash indicator means for converting the output current into the humanly perceptible output signal.

10. The strobe lamp monitoring apparatus of claim 9 wherein said flash indicator means includes a light emitting diode for generating a light pulse in response to each strobe flash.

11. The strobe lamp monitoring apparatus of claim 10 wherein said flash indicator means includes means for extending the pulse width of the light pulse emitted by said light emitting diode.

12. The strobe lamp monitoring apparatus of claim 7 wherein said diode means includes first and second diodes coupled in series.

13. The strobe lamp monitoring apparatus of claim 12 wherein said diode means includes a third diode coupled with reverse polarity in parallel with said first and second diodes for passing strobe trigger current to said strobe lamp.

14. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means includes a resistor.

15. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means includes an inductor.

16. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means includes a current transformer having a primary winding coupled in series with said strobe lamp.

17. The strobe lamp monitoring apparatus of claim 3 wherein said current sensor means includes a Hall effect sensor for generating an output voltage in response to a magnetic field induced by the flow of current through said strobe lamp.