Detection apparatus and obstacle detection system for vehicles using the same

• US 8,717,431 B2
• Filed: 12/07/2010
• Issued: 05/06/2014
• Est. Priority Date: 05/26/2010
• Status: Active Grant

• Current Assignee: Polight Technologies Limited
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lung, Chien-Lih
• Primary Examiner(s): Kelley, Christopher S
• Assistant Examiner(s): Tarko, Asmamaw G
• Application Number:
  US12/961,676
• Publication Number:
  US 20110293138A1
• Time in Patent Office: 1,246 Days
• Field of Search: 348/118, 382/103
• US Class Current: 348/118
• CPC Class Codes: B60R 21/013 including means for detecting collisions, impending collisions or roll-over
• CPC Class Codes: G01S 15/86 Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
• CPC Class Codes: G01S 15/931 of land vehicles
• CPC Class Codes: G01S 7/521 Constructional features
• CPC Class Codes: G02B 9/00 Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - G02B15/00 takes precedence
• CPC Class Codes: G06T 1/00 General purpose image data processing
• CPC Class Codes: G06T 11/00 2D [Two Dimensional] image generation

Abstract

A detection apparatus includes a housing, a circuit board, an image detection module, an ultrasonic detection module, and a connecting terminal. The image detection module includes a barrel, one or more lenses received in the barrel, and an image sensor configured to receive light through the lens and generate image signals. The image sensor is electrically connected to the circuit board. The ultrasonic detection module includes a piezoelectric member fixed to the housing to emit ultrasonic waves and receive reflected ultrasonic waves, and an ultrasonic control module operable to apply a voltage on the piezoelectric member, receive alternating voltages generated by the piezoelectric member, and generate voltage signals when receiving the voltages from the piezoelectric member. The ultrasonic control module is electrically connected to the piezoelectric member and the circuit board. The connecting terminal is electrically connected to the circuit board to output the image signals and the voltage signals.

Claims

1. A detection apparatus comprising:

a housing comprising a sleeve, a front cover formed on a first end of the sleeve, and a rear cover positioned on an opposite second end of the sleeve, the front cover defining a light input hole;

an image detection module comprising;

a barrel received in the sleeve and apart from the sleeve, the barrel surrounding the light input hole;

at least one lens received in the barrel; and

an image sensor received in the barrel and configured to receive light from the at least one lens and generate a plurality of image signals;

an ultrasonic detection module comprising;

a piezoelectric member fixed to the housing and arranged between the barrel and the sleeve, the piezoelectric member is configured to emit a plurality of ultrasonic waves and receive the reflected ultrasonic waves; and

an ultrasonic control module operable to apply a voltage on the piezoelectric member, receive the voltages generated by the piezoelectric member, and generate a plurality of voltage signals when receiving the voltages from the piezoelectric member;

a circuit board received in the barrel, the image sensor positioned on the circuit board and facing the front cover, the ultrasonic control module positioned on the circuit board and facing the rear cover; and

a connecting terminal electrically connected to the circuit board to output the image signals and the voltage signals, wherein the image sensor is electrically connected to the circuit board, and the ultrasonic control module is electrically connected to the piezoelectric member and the circuit board.

4. The detection apparatus of claim 1, wherein the barrel is integrally formed with the front cover and extends from an inner circumference of the light input hole toward the rear cover.

5. The detection apparatus of claim 1, further comprising a plurality of wirings, wherein the barrel is parallel to the sleeve and defines a cutout at a distal end thereof a receiving space is formed between the barrel and the sleeve, the piezoelectric member is received in the receiving space, the wirings pass through the cutout and the receiving space and connect the piezoelectric member to the ultrasonic control module.

6. The detection apparatus of claim 5, wherein the piezoelectric member is annular and is disposed around the light input hole and the barrel.

7. The detection apparatus of claim 6, wherein the piezoelectric member is adhered to the front cover.

8. The detection apparatus of claim 7, wherein the front cover is substantially a metal sheet having a diameter larger than that of the sleeve, and the light input hole is defined in a central portion of the front cover to allow light to enter into the image detection module.

9. The detection apparatus of claim 8, wherein the rear cover defines a through hole to receive the connecting terminal.

10. The detection apparatus of claim 7, wherein the piezoelectric member is made of piezoelectric ceramic.

2. An obstacle detection system for vehicles, comprising:

a detection apparatus comprising;

a housing comprising a sleeve, a front cover formed on a first end of the sleeve, and a rear cover positioned on an opposite second end of the sleeve, the front cover defining a light input hole;

an image detection module comprising;

a barrel received in the sleeve and apart from the sleeve, the barrel surrounding the light input hole;

at least one lens received in the barrel; and

an image sensor received in the barrel and configured to receive light from the at least one lens and generate a plurality of image signals;

an ultrasonic detection module comprising;

a piezoelectric member fixed to the housing and arranged between the barrel and the sleeve, the piezoelectric member is configured to emit a plurality of ultrasonic waves and receive the reflected ultrasonic waves; and

an ultrasonic control module operable to apply a voltage on the piezoelectric member, receive the voltages generated by the piezoelectric member, and generate a plurality of voltage signals when receiving the voltages from the piezoelectric member;

a circuit board received in the barrel, the image sensor positioned on the circuit board and facing the front cover, the ultrasonic control module positioned on the circuit board and facing the rear cover;

a connecting terminal electrically connected to the circuit board to output the image signals and the voltage signals;

a distance detection unit configured to calculate a distance value between the vehicle and one or more obstacles, the distance detection unit comprising;

a timing circuit to detect a delay time between emission of the ultrasonic waves from the detection apparatus and reception of the returning reflected waves thereof,

an emitting control circuit to activate the ultrasonic control module to apply a voltage on the piezoelectric member, and

a receiving control circuit to detect the voltage signals from the ultrasonic control module; and

an image processing unit electrically connected to the detection apparatus and the distance detection unit to display the images of the obstacles and the distance values, wherein the image sensor is electrically connected to the circuit board, and the ultrasonic control module is electrically connected to the piezoelectric member and the circuit board.

3. The obstacle detection system of claim 2, wherein the image processing unit is configured to display the images of the obstacles and the distance values simultaneously.

11. The obstacle detection system of claim 2, wherein the barrel is integrally formed with the front cover and extends from an inner circumference of the light input hole toward the rear cover.

12. The obstacle detection system of claim 11, further comprising a plurality of wirings, wherein the barrel is parallel to the sleeve and defines a cutout at a distal end thereof, a receiving space is formed between the barrel and the sleeve, the piezoelectric member is received in the receiving space, the wirings pass through the cutout and the receiving space and connect the piezoelectric member to the ultrasonic control module.

13. The obstacle detection system of claim 12, wherein the piezoelectric member is annular and is disposed around the light input hole and the barrel.

14. The obstacle detection system of claim 13, wherein the piezoelectric member is adhered to the front cover.

15. The obstacle detection system of claim 14, wherein the front cover is substantially a metal sheet having a diameter larger than that of the sleeve, and the light input hole is defined in a central portion of the front cover to allow light to enter into the image detection module.

16. The obstacle detection system of claim 15, wherein the rear cover defines a through hole to receive the connecting terminal.

17. The obstacle detection system of claim 14, wherein the piezoelectric member is made of piezoelectric ceramic.