Light emission power control apparatus and method

• US 9,860,962 B2
• Filed: 10/12/2016
• Issued: 01/02/2018
• Est. Priority Date: 01/19/2015
• Status: Active Grant

• Current Assignee: Tetra Tech Incorporated
• Original Assignee: Tetra Tech Incorporated
• Inventors: Mesher, Darel
• Primary Examiner(s): CRAWFORD, JASON
• Application Number:
  US15/291,335
• Publication Number:
  US 20170034892A1
• Time in Patent Office: 447 Days
• CPC Class Codes: B61K 9/08 Measuring installations for surveying permanent way applications of measuring apparatus or devices for track building purposes E01B35/00; measuring techniques G01
• CPC Class Codes: B61L 23/042 Track changes detection
• CPC Class Codes: B61L 23/048 Road bed changes, e.g. road bed erosion
• CPC Class Codes: G01B 11/303 using photoelectric detection means
• CPC Class Codes: G01N 21/251 Colorimeters; Construction thereof
• CPC Class Codes: G01N 21/255 Details, e.g. use of specially adapted sources, lighting or optical systems
• CPC Class Codes: G01N 2201/06113 Coherent sources; lasers

Abstract

A system and method for adjusting light emitter output for a railway track inspection system based on data feedback from one or more sensors.

Claims

1. A system for inspecting a railway track configured to adjust the intensity of a light emitting apparatus based on the motion of the system relative to an adjacent railway track wherein the system is mounted to a railway track vehicle, the system comprising:

a power source;

a light emitting apparatus powered by the power source for emitting light energy toward a railway track;

at least one motion detector for detecting the motion of the system relative to an adjacent railway track; and

a processor in communication with the at least one motion detector wherein the processor includes an algorithm for adjusting the power of the light emitting apparatus, the algorithm comprising the steps of;

a. determining whether the system is moving relative to an adjacent railway track based on incoming data from the at least one motion detector;

b. adjusting a light emitter control output value based at least in part on incoming data from the at least one motion detector; and

a controller in communication with the processor wherein the controller is configured to control the light intensity of the light emitting apparatus in response to the light emitter control output value.

2. The system of claim 1 wherein the algorithm for adjusting the power of the light emitting apparatus further comprises the step of adjusting the light emitter control output value to a value that causes the controller to shut off power to the light emitting apparatus if the system is moving below a minimum speed relative to an adjacent railway track.

3. The system of claim 1 wherein the algorithm for adjusting the power of the light emitting apparatus further comprises the step of adjusting the light emitter control output value to a value that causes the controller to provide power to the light emitting apparatus if the system is moving at or above a minimum speed relative to an adjacent railway track.

4. A method of inspecting a railway track bed using a light source with real time adjustable light emission, the method comprising the steps of:

a. emitting light from a mobile inspection system comprising a light source wherein the emitted light is emitted toward an adjacent railway track bed;

b. detecting motion of the mobile inspection system relative to the adjacent railway track bed;

c. adjusting a light emitter control output value based on the detected motion of the mobile inspection system; and

d. controlling the light intensity of the light emitting apparatus in response to the adjusted light emitter control output value.

5. The method of claim 4 wherein the detecting step further comprises detecting the speed of the system relative to the adjacent railway track bed.

6. The method of claim 5 wherein the adjusting step further comprises adjusting the control output value to a value that causes the power to the light emitting apparatus to be shut off if the detected speed of the railway track vehicle falls below a minimum speed threshold.

7. The method of claim 5 wherein the controlling step further comprises disabling power to the light emitting apparatus in response to the control output value.

8. The method of claim 4 wherein the adjusting step further comprises adjusting the control output value to a value that causes the power to the light emitting apparatus to be activated if the detected speed of the railway track vehicle is equal to or greater than a minimum speed threshold.

9. The method of claim 8 wherein the controlling step further comprises activating power to the light emitting apparatus in response to the control output value.