OBJECT DETECTION DEVICE AND METHOD THEREOF

• US 20130241760A1
• Filed: 05/14/2012
• Published: 09/19/2013
• Est. Priority Date: 03/16/2012
• Status: Abandoned Application

• Current Assignee: Quadlink Technology, Inc.
• Original Assignee: Chun-Kai Derrick Wei, Hsiao-Ping Yuan, Jui-Hsiang Chang, Ming-Li Cheng, Rung-Chi Chuang, Tien-Hsiung Sung, Yao-Jen Chen, Yu-Jen Lin
• Inventors: CHEN, Yao-Jen, WEI, Chun-Kai Derrick, CHANG, Jui-Hsiang, CHENG, Ming-Li, CHUANG, Rung-Chi, LIN, Yu-Jen, YUAN, Hsiao-Ping, SUNG, Tien-Hsiung
• Application Number:
  US13/470,489
• Publication Number:
  US 20130241760A1
• Time in Patent Office: Days
• US Class Current: 342/27
• CPC Class Codes: G01S 13/04 Systems determining presence of a target based on relative movement of target G01S13/56
• CPC Class Codes: G01S 7/027 Constructional details of housings, e.g. form, type, material or ruggedness

Abstract

An object detection device includes a RF emitter composed of a RF emitting module and an emitter antenna for emitting an EM wave, a RF receiver composed of a RF receiving module and a RF antenna for receiving a reflected EM wave by a predetermined object and a processor connected to the RF emitter and the RF receiver to process the received reflected EM wave so as to obtain a received signal strength indicator (RSSI) such that existence of the object is determined based on fluctuation of the RSSI when compared with a predetermined threshold value.

Claims

1. An object detection device comprising:

a RF emitter composed of a RF emitting module and an emitter antenna for emitting an EM wave;

a RF receiver composed of a RF receiving module and a RF antenna for receiving a reflected EM wave by a predetermined object; and

a processor connected to the RF emitter and the RF receiver to process the received reflected EM wave so as to obtain a received signal strength indicator (RSSI) such that existence of the object is determined based on fluctuation of the RSSI when compared with a predetermined threshold value.

2. The device as claimed in claim 1, wherein the RF emitter and the RF receiver are placed in parallel relative to one another.

3. The device as claimed in claim 1, wherein the EM wave has a carrier wave within industrial scientific medical band (ISM band), which is 902˜

928 MHz, 2.400˜

2.4835 GHz or 5.725˜

5.875 GHz.

4. The device as claimed in claim 1 further comprising a casing composed of a lid and sidewalls to receive therein the RF emitter and the RF receiver.

5. The device as claimed in claim 4, wherein the casing is composed of a lid made of a material capable of allowing penetration of the EM wave and sidewalls made of a material incapable of allowing penetration of the EM wave.

6. The device as claimed in claim 2 further comprising a casing composed of a lid and sidewalls to receive therein the RF emitter and the RF receiver.

7. The device as claimed in claim 6, wherein the casing is composed of a lid made of a material capable of allowing penetration of the EM wave and sidewalls made of a material incapable of allowing penetration of the EM wave.

8. The device as claimed in claim 3 further comprising a casing composed of a lid and sidewalls to receive therein the RF emitter and the RF receiver.

9. The device as claimed in claim 8, wherein the casing is composed of a lid made of a material capable of allowing penetration of the EM wave and sidewalls made of a material incapable of allowing penetration of the EM wave.

10. The device as claimed in claim 5 further comprising a baffle mounted inside the casing to separate the RF emitter and the RF receiver.

11. The device as claimed in claim 7 further comprising a baffle mounted inside the casing to separate the RF emitter and the RF receiver.

12. The device as claimed in claim 9 further comprising a baffle mounted inside the casing to separate the RF emitter and the RF receiver.

13. The device as claimed in claim 10, wherein the emitter antenna and the receiving antenna are panel antenna, high directive antenna or mesh antenna.

14. The device as claimed in claim 11, wherein the emitter antenna and the receiving antenna are panel antenna, high directive antenna or mesh antenna.

15. The device as claimed in claim 12, wherein the emitter antenna and the receiving antenna are panel antenna, high directive antenna or mesh antenna.

16. An object detection method comprising the steps of:

transmitting an EM wave;

receiving the EM wave reflected by a predetermined object;

obtaining a received signal strength indicator (RSSI) in according to the received EM wave;

determining if fluctuation of the RSSI is larger than a thresh value; and

judging existence of the object.

17. The method as claimed in claim 16, wherein the EM wave is transmitted and received periodically.

18. The method as claimed in claim 16, wherein the EM wave is transmitted in every two minutes.