Backup system to position vehicle relative to stationary trailer during backing procedure

• US 5,729,194 A
• Filed: 11/26/1996
• Issued: 03/17/1998
• Est. Priority Date: 11/26/1996
• Status: Expired due to Fees

• Current Assignee: Dan E. Spears, Gerald J. Carey II
• Original Assignee: Dan E. Spears, Gerald J. Carey II
• Inventors: Carey, Gerald J. II, Spears, Dan E.
• Primary Examiner(s): Swarthout, Brent A.
• Application Number:
  US08/756,436
• Time in Patent Office: 476 Days
• Field of Search: 340/425.5, 340/431, 340/435, 340/901, 340/903, 340/686, 280/477, 280/511, 33/264, 33/286, 250/491.1
• US Class Current: 340/431
• CPC Class Codes: B60D 1/06 Ball-and-socket hitches , e.g. constructional details, auxiliary devices, their arrangement on the vehicle
• CPC Class Codes: B60D 1/36 for facilitating connection, e.g. hitch catchers , visual guide means, signalling aids B60D1/465 takes precedence; vehicle signalling in general B60Q; optical arrangements specially adapted for viewing trailer-hitches B60R1/003
• CPC Class Codes: B60D 1/58 Auxiliary devices

Abstract

Various configurations of components to provide for either informing an operator of a vehicle of relative positions of the vehicle and a stationary trailer during a backing procedure or informing the operator of an arrival at a hitchable position during the backing procedure. Three general embodiments are disclosed which include use of a magnetically activated switch, use of an autofocus assembly and use of a light reflective arrangement. Several possible combinations of the separate embodiments are explained which enhance the function of the assemblies to ensure proper positioning of the vehicle relative to the stationary trailer. Explanations of each embodiment are provided along with numerous variations to each. Each of the embodiments rely upon a component, or group of components, located on the vehicle which require a power source to operate. When it is a requirement that a component be placed upon the stationary trailer, that component does not require a source of power. An explanation of various modes of informing the operator of the feedback from the deployed components are presented. These include both audio feedback as well as visual feedback.

Claims

1. A vehicle backup guidance system to provide for an operator of a vehicle to be informed of a distance measurement and an angular orientation measurement, both measurements indicative of a relative position of a coupling ball member and a coupling member during a backing procedure, the coupling ball member mounted on a rearward end of the vehicle, the coupling member mounted on a forward end of a stationary trailer, the backing procedure to position the vehicle relative to the stationary trailer in a hitchable position to allow the connection of the coupling member to the coupling ball member, the coupling member of the stationary trailer being a closest object of the stationary trailer to the vehicle during the backing procedure, the vehicle backup guidance system comprising:

a) an autofocus assembly to provide for identifying a closest object within a predetermined sight zone, the sight zone having a center projection line, a maximum angular vertical limit upward from the center projection line, a maximum angular vertical limit downward from the center projection line, a maximum angular horizontal limit right of the center projection line and a maximum angular horizontal limit left of the center projection line, the autofocus assembly mounted on the rearward end of the vehicle in close proximity to the coupling ball member, the sight zone extending rearward from the vehicle with the center projection line horizontally aligned with a center longitudinal axis of the vehicle, the autofocus assembly comprising;

1) distance measurement means to provide for a calculation of a distance measurement from the autofocus assembly to the closest object within the predetermined sight zone during the backing procedure, the calculation returning a distance measurement;

2) angular orientation measurement means to provide for a calculation of an angular offset measurement from the center projection line of the sight zone to the closest object within the predetermined sight zone during the backing procedure, the calculation returning an angular orientation measurement;

b) transfer means to provide for electronically transferring the distance measurement and for electronically transferring the angular orientation measurement;

c) receiving means to provide for receiving the electronically transferred distance measurement and the electronically transferred angular orientation measurement;

d) indication means to provide for informing the operator of the positional placement of the autofocus assembly relative to the closest object within the sight zone during the backing procedure, the indication means receiving the electronically transferred distance measurement and the electronically transferred angular orientation measurement from the receiving means;

whereby the operator is informed of the positional placement of the autofocus assembly, and therefore of the vehicle upon which the autofocus assembly is mounted, and the closest object within the sight zone, and therefore of the coupling member of the stationary trailer, during the backing procedure.

2. The vehicle backup guidance system defined in claim 1 wherein the angular offset measurement is limited to an angular offset and a directional indication, the angular offset a measurement from of the center projection line measured horizontal to an intersection with a vertical projection plane having the closest object within the sight zone and the autofocus assembly, the directional indication an indication of right or left of the center projection line to the intersection.

3. The vehicle backup guidance system defined in claim 1 wherein the autofocus assembly further comprises identification of the closest object by employing a clarity of diffusion of image assembly, the clarity of diffusion of image assembly continually focusing to identify by diffusion of image a nearest object within the zone of sight.

4. The vehicle backup guidance system defined in claim 1 wherein the autofocus assembly further comprises identification of the closest object by employing at least two sight ports and a comparison assembly to identify the nearest object within the zone of sight.

5. The vehicle backup guidance system defined in claim 1 further comprising:

a) a magnetic member to provide for producing a magnetic field, the magnetic member positionable upon the stationary trailer in close proximity to the coupling member during the backing procedure;

b) a switch having an open position and a closed position, the switch biased to remain in the open position, the switch mounted upon the vehicle in close proximity to the coupling ball member of the vehicle, the switch transferred from the open position to the closed position when the switch moves into close proximity to the magnetic member;

c) transfer means to provide for a transfer of an electronic signal when the switch is transferred between the open position and the closed position;

d) operator confirmation means to provide for an informing of the operator of the vehicle when the vehicle arrives at the hitchable position relative to the stationary trailer, the informing precipitated by the electronic signal transferred by the transfer means;

whereby, in addition to providing the operator of the vehicle with distance measurement and angular orientation information during the backing procedure, the operator is informed by the operator confirmation means of arrive at the hitchable position of the vehicle relative to the stationary trailer.

6. A vehicle backup guidance system to provide for an operator of a vehicle to be informed of an alignment orientation indication and a distance measurement indication, both indications of a relative position of a coupling ball member and a coupling member during a backing procedure, the coupling ball member mounted on a rearward end of the vehicle, the coupling member mounted on a forward end of a stationary trailer, the backing procedure to position the vehicle relative to the stationary trailer to allow the connection of the coupling member to the coupling ball member, the vehicle backup guidance system comprising:

a) a sending unit mounted on the vehicle in close proximity to the coupling ball member, the sending unit to provide for;

1) production of a transmitted light having unique characteristics and generated to extend rearward from the rearward end of the vehicle, and;

2) production of an electronic sending signal indicative of the unique characteristics of the transmitted light;

b) at least one reflector mounted on the stationary trailer in close proximity to the coupling member, the reflector to provide for a reflection of the transmitted light from the sending unit;

c) a first receiving unit and a second receiving unit, the first receiving unit mounted on the vehicle on a first lateral side of the coupling ball member, the second receiving unit mounted on the vehicle on a second lateral side of the coupling ball member, the first lateral side of the coupling ball member and the second lateral side of the coupling ball member located on opposing sides of the coupling ball member, the first and the second receiving units to provide for receiving light, the light received reflected from the reflector mounted on the stationary trailer, the first receiving unit and the second receiving unit each producing an electronic receiving signal indicative of unique characteristics of the received light;

d) transfer receiving means to provide for receiving;

1) the electronic sending signal produced by the sending unit;

2) the electronic receiving signals produced by the first receiving unit and the second receiving unit;

e) measuring means to provide for a measurement of a distance and a measurement of an alignment of a relative placement of the sending unit, the reflector and the receiving units based upon a comparison of the electronic signals received by the transfer receiving means;

f) orientation transfer means to provide for electronically transferring an electronic signal of the measurement of the distance and for electronically transferring an electronic signal of the measurement of the alignment;

g) indication means to provide for informing the operator based upon the measuring means of the alignment orientation indication of the positional placement of the vehicle relative to the stationary trailer and the distance measurement indication of the positional placement of the vehicle relative to the stationary trailer, the indication means receiving the electronic signal transferred by the orientation transfer means;

whereby the sending unit produces the transmitted light having unique characteristics which is generated to extend rearward from the rearward end of the vehicle to be reflected by the reflector mounted on the trailer to be received by the receiving units mounted on the vehicle on opposing lateral sides of the coupling ball member wherein the measuring means determines the measurement of the distance and the alignment of the relative placement of the sending unit, the reflector and the receiving units and these measurements are indicated by the indication means to the operator of the vehicle.

7. The vehicle backup guidance system defined in claim 6 wherein the unique characteristics of the transmitted light generated by the sending unit comprises bursts of predetermined durations of time and having a predetermined duration of time between each sequential burst.

8. The vehicle backup guidance system defined in claim 6 wherein the unique characteristics of the transmitted light generated by the sending unit comprises being limited to a uniquely identifiable part of a spectrum of light.

9. The vehicle backup guidance system defined in claim 6 wherein the sending unit is mounted on a first lateral side of the coupling ball member and wherein the vehicle backup guidance system further comprises a second sending unit mounted on a second lateral side of the coupling ball member, the first lateral side of the coupling ball member and the second lateral side of the coupling ball member located on opposing sides of the coupling ball member, the second sending unit to provide for:

a) production of a transmitted light having unique characteristics and generated to extend rearward from the rearward end of the vehicle;

b) production of an electronic sending signal indicative of the unique characteristics of the transmitted light, and;

wherein the reflector further provides for reflection of the transmitted light from the second sending unit and wherein the transfer receiving means further provides for receiving the electronic sending signal produced by the second sending unit and wherein the measuring means further provides for the measurement of the distance and the measurement of the alignment of the relative placement of the sending unit, the reflector, and the receiving units based upon an inclusion of the electronic sending signal of the second sending unit based upon the electronic signals received by the transfer receiving means;

whereby the orientation transfer means which provides for electronically transferring the electronic signal of the measurement of the distance and for electronically transferring the electronic signal of the measurement of the alignment to the indication means includes the comparison of the electronic signal sent by the second sending unit and any associative electronic signals sent by the first receiving unit and the second receiving unit.

10. The vehicle backup guidance system defined in claim 6 further comprising a third receiving unit and a fourth receiving unit, the third receiving unit mounted on the first lateral side of the coupling ball member adjacent the first receiving unit, the fourth receiving unit mounted on the second lateral side of the coupling ball member adjacent the second receiving unit, the third receiving unit and the fourth receiving unit each to provide for receiving light, the light received reflected from the reflector mounted on the stationary trailer, the third receiving unit and the fourth receiving unit each producing an electronic receiving signal indicative of unique characteristics of the received light;

and wherein the transfer receiving means further provides for receiving the electronic receiving signals produced by the third receiving unit and the electronic receiving signals produced by the fourth receiving unit

and wherein the measuring means further provides for the measurement of the distance and the measurement of the alignment of the relative placement of the sending unit, the reflector, and the receiving units based upon the inclusion of the electronic receiving signal of the third receiving unit and the electronic receiving signal of the fourth receiving unit based upon the electronic signals received by the transfer receiving means;

whereby the orientation transfer means which provides for electronically transferring the electronic signal of the measurement of the distance and for electronically transferring the electronic signal of the measurement of the alignment to the indication means includes the comparison of the electronic signal produced by the third receiving unit and the electronic signal produced by the fourth receiving unit.

11. A vehicle backup guidance system to provide for an operator of a vehicle to be informed of an alignment orientation indication and a distance measurement indication, both indications of a relative position of a coupling ball member and a coupling member during a backing procedure, the coupling ball member mounted on a rearward end of the vehicle, the coupling member mounted on a forward end of a stationary trailer, the backing procedure to position the vehicle relative to the stationary trailer to allow the connection of the coupling member to the coupling ball member, the vehicle backup guidance system comprising:

a) a first sending unit mounted on the vehicle in close proximity to the coupling ball member, the first sending unit to provide for;

1) production of a transmitted light having unique characteristics and generated to extend rearward from the rearward end of the vehicle, and;

2) production of an electronic sending signal indicative of the unique characteristics of the transmitted light;

b) a second sending unit mounted on the vehicle in close proximity to the coupling ball member, the second sending unit to provide for;

1) production of a transmitted light having unique characteristics and generated to extend rearward from the rearward end of the vehicle, and;

2) production of an electronic sending signal indicative of the unique characteristics of the transmitted light;

c) a reflector mounted on the stationary trailer in close proximity to the coupling member, the reflector to provide for a reflection of the transmitted light from the first sending unit and the second sending unit;

d) a receiving unit mounted on the vehicle in close proximity to the coupling ball member, the receiving unit to provide for receiving light, the light received reflected from the reflector mounted on the stationary trailer, the receiving unit producing an electronic receiving signal indicative of unique characteristics of the received light;

e) transfer receiving means to provide for receiving;

1) the electronic sending signal produced by the first sending unit;

2) the electronic sending signal produced by the second sending unit;

3) the electronic receiving signals produced by the receiving unit;

f) measuring means to provide for a measurement of a distance and a measurement of an alignment of a relative placement of the first sending unit, the second sending unit, the reflector and the receiving unit based upon a comparison of the electronic signals received by the transfer receiving means;

g) orientation transfer means to provide for electronically transferring an electronic signal of the measurement of the distance and for electronically transferring an electronic signal of the measurement of the alignment;

h) indication means to provide for informing the operator based upon the measuring means of the alignment orientation indication of the positional placement of the vehicle relative to the stationary trailer and the distance measurement indication of the positional placement of the vehicle relative to the stationary trailer, the indication means receiving the electronic signal transferred by the orientation transfer means;

whereby the sending units each produce transmitted light having unique characteristics which is generated to extend rearward from the rearward end of the vehicle to be reflected by the reflector mounted on the trailer to be received by the receiving unit mounted on the vehicle wherein the measuring means determines the measurement of the distance and the alignment of the relative placement of the sending units, the reflector and the receiving unit and these measurements are indicated by the indication means to the operator of the vehicle.

12. The vehicle backup guidance system defined in claim 11 wherein the receiving unit is mounted on a first lateral side of the coupling ball member and wherein the vehicle backup guidance system further comprises a second receiving unit mounted on a second lateral side of the coupling ball member, the first lateral side of the coupling ball member and the second lateral side Of the coupling ball member located on opposing sides of the coupling ball member, the second receiving unit to provide for receiving light, the light received reflected from the reflector mounted on the stationary trailer, the second receiving unit producing an electronic receiving signal indicative of unique characteristics of the received light, wherein the transfer receiving means further provides for receiving the electronic sending signal produced by the second receiving unit and wherein the measuring means further provides for the measurement of the distance and the measurement of the alignment of the relative placement of the first sending unit, the second sending unit, the reflector, the receiving unit and the second receiving unit based upon an inclusion of the electronic sending signal of the second receiving unit based upon the electronic signals received by the transfer receiving means;

whereby the orientation transfer means which provides for electronically transferring the electronic signal of the measurement of the distance and for electronically transferring the electronic signal of the measurement of the alignment to the indication means includes the comparison of the electronic signal received by the second receiving unit.