OBJECT DETECTING DEVICE, OBJECT DETECTING METHOD, OBJECT DETECTING PROGRAM, AND MOTION CONTROL SYSTEM

• US 20130268173A1
• Filed: 04/09/2013
• Published: 10/10/2013
• Est. Priority Date: 04/10/2012
• Status: Abandoned Application

• Current Assignee: Honda Elesys Co., Ltd. (Nidec Corporation)
• Original Assignee: Honda Elesys Co., Ltd. (Nidec Corporation)
• Inventors: KAMBE, Takeshi
• Application Number:
  US13/859,346
• Publication Number:
  US 20130268173A1
• Time in Patent Office: Days
• US Class Current: 701/96
• CPC Class Codes: G01S 13/345 using triangular modulation
• CPC Class Codes: G01S 13/346 using noise modulation
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/93185 Controlling the brakes
• CPC Class Codes: G01S 2013/9319 Controlling the accelerator
• CPC Class Codes: G01S 7/354 Extracting wanted echo-signals Doppler systems G01S13/50

Abstract

An object detecting device includes a signal transmitting and receiving unit configured to generate intermediate frequency signals based on transmission signals obtained by frequency modulation in multiple modulation periods and reception signals corresponding to reflected waves of the transmission signals, a distance detecting unit configured to calculate distances based on peak frequencies of the intermediate frequency signals generated by the signal transmitting and receiving unit, and a determination unit configured to determine whether or not the distances calculated by the distance detecting unit and corresponding to the multiple modulation periods are equal to each other.

Claims

1. An object detecting device comprising:

a signal transmitting and receiving unit configured to generate intermediate frequency signals based on transmission signals obtained by frequency modulation in multiple modulation periods and reception signals corresponding to reflected waves of the transmission signals;

a distance detecting unit configured to calculate distances based on peak frequencies of the intermediate frequency signals generated by the signal transmitting and receiving unit; and

a determination unit configured to determine whether or not the distances calculated by the distance detecting unit and corresponding to the multiple modulation periods are equal to each other.

2. The object detecting device according to claim 1, wherein the determination unit determines that the distances are based on a real image when the distances are determined to be equal to each other, and determines that the distances are not based on a real image and are invalid when the distances are determined to not be equal to each other.

3. The object detecting device according to claim 1, further comprising a received intensity calculating unit configured to determine whether or not the peak frequencies are equal to each other.

4. The object detecting device according to claim 3, wherein the received intensity calculating unit determines that the peak frequencies are based on noise and are invalid when the peak frequencies are determined to be equal to each other.

5. The object detecting device according to claim 1, wherein the signal transmitting and receiving unit switches a period used in frequency modulation of the transmission signals from one to another of the multiple modulation periods at a predetermined time interval.

6. The object detecting device according to claim 1, wherein the signal transmitting and receiving unit comprises:

transmitting units allotted to each of the multiple modulation periods and configured to transmit the transmission signals; and

receiving units allotted to each of the multiple modulation periods and configured to receive the reflected waves.

7. An object detecting method comprising:

a first step of generating intermediate frequency signals based on transmission signals obtained by frequency modulation in multiple modulation periods and reception signals corresponding to reflected waves of the transmission signals;

a second step of calculating distances based on peak frequencies of the intermediate frequency signals; and

a third step of determining whether or not the distances corresponding to the multiple modulation periods are equal to each other.

8. An object detecting program causing a computer of an object detecting device to perform:

a sequence of generating intermediate frequency signals based on transmission signals obtained by frequency modulation in multiple modulation periods and reception signals corresponding to reflected waves of the transmission signals;

a sequence of calculating distances based on peak frequencies of the intermediate frequency signals; and

a sequence of determining whether or not the distances corresponding to the multiple modulation periods are equal to each other.

9. A motion control system comprising an object detecting device and a motion control unit configured to control a motion based on a distance or a speed of an object input from the object detecting device,

wherein the object detecting device comprises:

a signal transmitting and receiving unit configured to generate intermediate frequency signals based on transmission signals obtained by frequency modulation in multiple modulation periods and reception signals corresponding to reflected waves of the transmission signals;

a distance detecting unit configured to calculate distances based on peak frequencies of the intermediate frequency signals generated by the signal transmitting and receiving unit; and

a determination unit configured to determine whether or not the distances calculated by the distance detecting unit and corresponding to the multiple modulation periods are equal to each other.