System and method for loop detector installation

• US 8,975,516 B2
• Filed: 07/27/2012
• Issued: 03/10/2015
• Est. Priority Date: 05/03/2007
• Status: Active Grant

• Current Assignee: Transcore LP (Roper Technologies, Inc.)
• Original Assignee: Transcore LP (Roper Technologies, Inc.)
• Inventors: Allen, Jim
• Primary Examiner(s): Patel, Dhirubhai R
• Application Number:
  US13/560,418
• Publication Number:
  US 20120292072A1
• Time in Patent Office: 956 Days
• Field of Search: 174/50, 174/58, 174 95- 98, 174/100, 248/906, 439/535, 220/4.02
• US Class Current: 174/50
• CPC Class Codes: G08G 1/02 using treadles built into the road pads or other sensitive devices responsive to passage of vehicles E01F11/00
• CPC Class Codes: Y10S 248/906 Electrical outlet box support

Abstract

A pre-fabricated ferromagnetic loop having a footprint characterized by a continuous wire shaped according to a predetermined planar pattern. In some embodiments, the predetermined planar pattern can be multiple contiguous polygons within a larger footprint used for establishing a sensor for the detection of moving vehicles. The footprint may include one of a triangle, a square, a rectangle, a rhombus, a parallelogram, an ellipse, or a circle, and/or other shapes or configurations. Similarly, each of the multiple contiguous polygons may include one of a triangle, a square, a rectangle, a rhombus, a parallelogram, and/or other shapes or configurations. A loop sensor housing is arranged to enclose a continuous loop sensor wire configured in the predetermined planar pattern. The prefabricated loop sensor is inserted in a groove web pre-cut in a receiving medium to match the predetermined planar pattern.

Claims

1. A housing forming an enclosed channel having a channel length for installation of a loop sensor in a receiving medium under a top surface of the receiving medium, wherein the loop sensor includes a wire, the housing comprising:

a hollow portion of the housing configured to receive the wire of the loop sensor therein such that, responsive to installation of the housing in the receiving medium, the hollow portion of the housing provides a sensor path for the wire of the loop sensor through the receiving medium, the sensor path having a sensor shape in the plane of the top surface of the receiving medium;

one or more wire guides, extending into said hollow portion of the housing and extending the length of the housing, configured to hold the wire of the loop sensor within the housing; and

a retaining lip disposed at or near a first end of the housing, wherein the retaining lip is configured such that responsive to installation of the housing in the receiving medium, the retaining lip engages the top surface of the receiving medium to maintain the wire of the loop sensor in the hollow portion of the housing at a fixed depth below the top surface in the receiving medium said housing further comprising an insertion end, said first end being opposite said insertion end, said insertion end being configured for insertion into the receiving medium.

2. The housing of claim 1, further comprising a deformable side portion configured to contact the receiving medium when the housing is installed in the receiving medium.

3. The housing of claim 1, further comprising sidewalls that extend from the retaining lip toward said insertion end of the housing, and wherein the retaining lip is formed integrally as a single contiguous element with the sidewalls.

4. The housing of claim 3, wherein the retaining lip extends outward from the sidewalls in two opposite directions.

5. The housing of claim 1, wherein the sensor shape of the sensor path comprises of one or more of a triangle, a rectangle, a square, a circle, an ellipse, a rhombus, or a parallelogram.

6. The housing of claim 1, wherein the retaining lip runs the entire length of the sensor path.

7. The housing of claim 1, further comprising a closable opening formed at or near said insertion end of the housing that is opposite the first end by separable portions, wherein the closable opening is configured to closably open to receive the wire of the loop sensor into the hollow portion of the housing for installation therein.

8. The housing of claim 1, wherein the hollow portion of the housing has a cross-section of about one-quarter of an inch by about one inch.

9. The housing of claim 1, wherein the sensor shape of the sensor path comprises multiple contiguous polygons, wherein each of the multiple contiguous polygons comprise one or more of a triangle, a rectangle, a square, a circle, an ellipse, a rhombus, or a parallelogram.

10. The housing of claim 9, further comprising sidewalls that extend from the retaining lip toward said insertion end of the housing, wherein the sidewalls form, in part, the hollow portion of the housing, and wherein the wire guides comprise a set of stacked protrusions that extend into the hollow portion of the housing from the sidewalls.

11. The housing of claim 9, wherein the wire of the loop sensor makes multiple turns around the path of the housing, and wherein the wire guides are configured to hold the wire turns individually.

12. A housing forming an enclosed channel having a length for installation of a loop sensor in a receiving medium under a top surface of the receiving medium, wherein the loop sensor includes a wire, the housing comprising:

a hollow portion of the housing configured to receive the wire of the loop sensor therein such that, responsive to installation of the housing in the receiving medium, the hollow portion of the housing provides a sensor path for the wire of the loop sensor through the receiving medium, the sensor path having a sensor shape in the plane of the top surface of the receiving medium;

a retaining lip disposed at or near a first end of the housing, wherein the retaining lip is configured such that responsive to installation of the housing in the receiving medium, the retaining lip engages the top surface of the receiving medium to maintain the wire of the loop sensor in the hollow portion of the housing at a fixed depth below the top surface in the receiving medium; and

a closable opening formed by the housing, at or near an insertion end of the housing that is opposite the first end, wherein the closable opening is configured to closably open to receive the wire of the loop sensor into the hollow portion of the housing for installation therein and wherein said insertion end is configured for insertion into said receiving medium.

13. The housing of claim 12, wherein the sidewalls extend from the retaining lip toward the second end of the housing that is opposite the first end, and wherein the retaining lip is formed integrally as a single contiguous element with the sidewalls.

14. The housing of claim 13, wherein the retaining lip extends outward from the sidewalls in two opposite directions.

15. The housing of claim 13, wherein the closable opening is formed between the sidewalls.

16. The housing of claim 12, wherein the closable opening runs the entire length of the sensor path.

17. The housing of claim 12, wherein the hollow portion of the housing has a cross-section of about one-quarter of an inch by about one inch.

18. The housing of claim 12, further comprising a set of wire guides formed within the housing, the wire guides being configured to hold the wire of the loop sensor within the housing.

19. The housing of claim 18, wherein the sidewalls extend from the retaining lip toward said insertion end of the housing, wherein the sidewalls form, in part, the hollow portion of the housing, and wherein the set of wire guides comprises a set of stacked protrusions that extend into the hollow portion of the housing from the sidewalls.

20. The housing of claim 18, wherein the wire of the loop sensor makes multiple turns around the path of the housing, and wherein the set of wire guides are configured to hold the wire turns individually.