Sector-scanning device

Patent metadata

Field	Value
Publication number	US-9459350-B2
Application number	US-201414213106-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 15, 2013
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A sector-scanning sonar imaging system with at least one sonar imaging element housed within a transducer housing coupled to a self-reciprocating mechanism, and a drive mechanism housed within a waterproof housing. The oscillating motion of the transducer housing produces a highly-detailed, photo like sector scan sonar image of the bottom and other objects surrounding the boat on which it is mounted. The drive mechanism housing may be rigidly attached to either a boat hull or to a trolling motor. The sonar imaging element housing may be removably attached to the drive mechanism, and shielded by an acoustically transparent shroud to protect the elements from damage. The sector-scanning sonar imaging system connects to a control head with display either directly, or through some other communications protocol, such as a wireless protocol.

First claim

What is claimed is:

1. A sector-scanning sonar imaging system comprising:
a first sonar imaging element housed within a transducer housing, the transducer housing configured for attachment to some portion of a boat; and
a self-reciprocating mechanism configured to produce oscillating movement of the transducer housing and the first sonar imaging element therein, wherein the oscillating movement allows the first sonar imaging element to produce a sector scan sonar image for a portion of an area around the boat;
wherein the self-reciprocating mechanism is configured to periodically stop movement of the transducer housing while the first sonar imaging element transmits and receives.

2. The sector-scanning sonar imaging system of claim 1 , wherein the sonar imaging element has a depression angle between 10 and 45 degrees with respect to a vertical plane.

3. The sector-scanning sonar imaging system of claim 1 , wherein the transducer housing is pivotably attached at a pivot point to a support member, and wherein the self-reciprocating mechanism comprises a linear actuator is attached to the support member, the linear actuator having an actuating member attached to the transducer housing;
wherein a reciprocating movement of the actuating member causes the oscillatory movement of the transducer housing about the pivot point.

4. The sector-scanning sonar imaging system of claim 3 , wherein the linear actuator is powered either electrically, hydraulically, or pneumatically.

5. The sector-scanning sonar imaging system of claim claim 1 , further comprising a second sonar imaging element located adjacent the first sonar imaging element, wherein the oscillatory movement of the transducer housing about a pivot point produces two sector scan sonar images.

6. The sector-scanning sonar imaging system of claim 5 , wherein each of the two sector scan sonar images has a respective center, the centers spaced from 5 degrees to 90 degrees apart.

7. The sector-scanning sonar imaging system of claim 5 , wherein the first and second sonar imaging elements are separated along the axis of rotation such that each sonar imaging element has an unobstructed path for the sound to travel.

8. The sector-scanning sonar imaging system of claim 1 , wherein the transducer housing has a slot therein and is pivotably anchored in place at a pivot point;
wherein the self-reciprocating mechanism comprises a wheel adjacent to the slot in the transducer housing, the wheel having a post attached to a face thereof, the post being held within the slot; and
wherein turning of the wheel causes the post to move within the slot which produces an oscillatory movement of the transducer housing about the pivot point.

9. The sector-scanning sonar imaging system of claim 8 , wherein the wheel is driven either electrically, hydraulically, or pneumatically.

10. The sector-scanning sonar imaging system of claim 9 , wherein the wheel is coupled to the driving mechanism through a slip clutch mechanism.

11. The sector-scanning sonar imaging system of claim 1 , wherein the transducer housing and self-reciprocating mechanism are attached to a motor pod of a trolling motor.

12. The sector-scanning sonar imaging system of claim 11 , wherein the transducer housing and self-reciprocating mechanism are attached to a pair of pivoting legs that allow the sonar imaging system to move from beyond an end of the motor pod to a position towards the center of the motor pod.

13. The sonar imaging system of claim 11 , wherein the transducer housing and self-reciprocating mechanism are attached to a track system that allows the sonar imaging system to move from beyond an end of the motor pod to a position towards the center of the motor pod.

14. The sector-scanning sonar imaging system of claim 13 , wherein the track system is spring loaded.

15. The sector-scanning sonar imaging system of claim 1 , wherein the housing is rigidly attached to the shaft of a stepper motor that rotates back and forth sweeping the sonar imaging element through an angle.

16. The sector-scanning sonar imaging system of claim 1 , wherein a sweep angle of the transducer housing between periodic stops is variable.

17. The sector-scanning sonar imaging system of claim 1 , wherein the transducer housing is rigidly attached to a shaft of a motor equipped with a rotary encoder that relays information about position and speed of the housing and first sonar imaging element, such that an external controller can determine the sweep speed and angle of the first sonar imaging element.

18. The sector-scanning sonar imaging system of claim 17 , wherein the housing is attached to the shaft of the motor through a slip clutch mechanism.

19. The sector-scanning sonar imaging system of claim 17 , wherein the self-reciprocating mechanism is configured such that a sweep angle of the first sonar imaging element can be adjusted.

20. The sector-scanning sonar imaging system of claim 1 , wherein the first sonar imaging element and the transducer housing are removably attached to the self-reciprocating mechanism.

21. The sector-scanning sonar imaging system of claim 1 , wherein the first sonar imaging element and the transducer housing are protected by a rigid shroud that surrounds the first sonar imaging element and the transducer housing.

22. The sector-scanning sonar imaging system of claim 21 , wherein the rigid shroud is made of an acoustically transparent material.

23. The sector-scanning sonar imaging system of claim 1 , wherein the sonar imaging system has an onboard compass to detect orientation of the sonar imaging system.

24. The sector-scanning sonar imaging system of claim 23 , wherein the sonar imaging system is connected to a control head display which displays a current GPS location.

25. The sector-scanning sonar imaging system of claim 24 , wherein the control head is able to mark a waypoint on a sector-scanning sonar image and relate the waypoint to a GPS location using GPS data and the orientation of the sonar imaging system.

26. The sector-scanning sonar imaging system of claim claim 1 , wherein the first sonar imaging element produces a fan-shaped beam that is wider in a vertical orientation than in a horizontal orientation.

27. The sector-scanning sonar imaging system of claim 26 , wherein the fan-shaped beam is greater than 40 degrees in the vertical orientation, and less than five degrees in the horizontal orientation.

28. The sector-scanning sonar imaging system of claim 1 , wherein the self-reciprocating mechanism causes the transducer housing to oscillate through a variable, user-defined sweep angle.

29. The sector-scanning sonar imaging system of claim 28 , wherein the user-defined sweep angle can be varied by a user in real-time.

Assignees

• Betts David A
• Dehart Sean M
• Johnson Outdoors Inc

Inventors

• Betts David A
• Dehart Sean M

Classifications

• G01S15/89 Primary

  for mapping or imaging · CPC title

• G01S7/6236

  Sector-scan displays · CPC title

• G01S15/96

  for locating fish · CPC title

• G01S15/86

  Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection · CPC title

• G01S7/521

  Constructional features · CPC title