公开(公告)号：US2256619A

公开(公告)日：1941-09-23

申请号：US33832640

申请日：1940-06-01

Applicant: RCA CORP

Inventor： LUCK DAVID G C

IPC: G01S3/08

CPC classification number: G01S3/08

公开(公告)号：US2207061A

公开(公告)日：1940-07-09

申请号：US15415337

申请日：1937-07-17

Applicant: LORENZ C AG

Inventor： KURT KOSCHMIEDER

IPC: G01S3/08

CPC classification number: G01S3/08

公开(公告)号：US2202368A

公开(公告)日：1940-05-28

申请号：US17399237

申请日：1937-11-11

Applicant: TELEFUNKEN GMBH

Inventor： WALTER BERNDT

IPC: G01S3/08 ,  G01S3/12

CPC classification number: G01S3/085 ,  G01S3/12

公开(公告)号：US2166100A

公开(公告)日：1939-07-11

申请号：US13565037

申请日：1937-04-08

Applicant: PAN AMERICAN AIRWAYS CORP

Inventor： SULLINGER FERRIS W

IPC: G01S3/08

CPC classification number: G01S3/08 ,  Y10T403/645

公开(公告)号：US1723461A

公开(公告)日：1929-08-06

申请号：US1723461D

IPC: G01S3/06 ,  G01S3/08 ,  G01S3/12

CPC classification number: G01S3/12 ,  G01S3/065 ,  G01S3/085

公开(公告)号：US1587657A

公开(公告)日：1926-06-08

申请号：US51995421

申请日：1921-12-05

Applicant: FED TELEGRAPH CO

Inventor： KOLSTER FREDERICK A

IPC: G01S3/08

CPC classification number: G01S3/085

公开(公告)号：US09823340B2

公开(公告)日：2017-11-21

申请号：US13693390

申请日：2012-12-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Dong-Ik Ko

IPC: G01S3/08 ,  G01S7/493 ,  G01S17/36 ,  G01S17/89 ,  G01C15/00

CPC classification number: G01S7/493 ,  G01C15/002 ,  G01S17/36 ,  G01S17/89

Abstract: A method removing adjecent frequency interference from a Time Of Flight sensor system by adaptively adjusting the transmitted infrared illumination frequency of the TOF sensor by measuring the interfering infrared illuminating frequencies and dynamicaly adjusting the transmitted illuminating infrared frequency of the TOF sensor to eliminate the interference.

公开(公告)号：US07903022B2

公开(公告)日：2011-03-08

申请号：US12628620

申请日：2009-12-01

Applicant: Hideyuki Ohara ,  Takehiro Kawai ,  Keisuke Saito ,  Kosuke Hayama

Inventor： Hideyuki Ohara ,  Takehiro Kawai ,  Keisuke Saito ,  Kosuke Hayama

IPC: G01S3/08

CPC classification number: G01S13/84 ,  G01S13/38 ,  H04B5/0056 ,  H04B5/0062 ,  H04B17/27

Abstract: A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W request signal via different carrier frequencies. A phase information acquirer 8A detects a phase change amount of the tag response signal that is transmitted via different carrier frequencies. A distance calculator 8B calculates the distance between the reader/writer 2 and the RFID tag 1 on the basis of the phase change amount.

Abstract translation: 发送控制器7B被配置为向RFID标签1发送用于请求发送标签响应信号的R / W请求信号两次。 此时，频率控制器7A控制PLL部5A，经由不同的载波频率发送R / W请求信号。 相位信息获取器8A检测经由不同载波频率发送的标签响应信号的相位变化量。 距离计算器8B基于相位变化量来计算读取器/写入器2和RFID标签1之间的距离。

公开(公告)号：US07826039B2

公开(公告)日：2010-11-02

申请号：US11579269

申请日：2005-04-29

Applicant: Juerg Hinderling

Inventor： Juerg Hinderling

IPC: G01S3/08

CPC classification number: G01S7/4811 ,  G01C3/00 ,  G01C15/002 ,  G01C15/006 ,  G01S7/4818 ,  G01S17/08

Abstract: For the deliberate attenuation of beam components which originate from multiple reflections, an attenuation filter (18; 19) which produces an attenuation of the intensity by at least a factor of 0.7, preferably at least 0.5 or 0.3, is arranged in each case before a receiver (2) and after a transmitter (1). Alternatively or additionally, deflection means, such as a mirror (10) or a cubic prism (14), can be formed so as to attenuate a beam. Since multiply reflected beam components pass through the attenuation means at least twice as frequently as the regular beam components the former are accordingly more greatly attenuated. Furthermore, an entry surface (5) of the receiver (2) may be surrounded by a conical deflection surface which substantially absorbs light incident on it and reflects the remainder in directions other than the direction of incidence, so that this cannot give rise to multiple reflections.

Abstract translation: 对于源于多次反射的光束分量的有意衰减，衰减滤波器（18; 19）在强度的衰减至少为0.7的范围内，优选地至少为0.5或0.3，这是在 接收机（2）和发射机（1）之后。 或者或另外，可以形成偏转装置，例如反射镜（10）或立方棱镜（14），以便使光束衰减。 由于乘法反射光束分量通过衰减装置至少是常规光束分量的两倍，因此前者被更大程度地衰减。 此外，接收器（2）的进入表面（5）可以被锥形偏转表面包围，所述锥形偏转表面基本上吸收入射到其上的光，并且将其余部分反射到除了入射方向以外的方向上，使得其不能产生多个 反思。

公开(公告)号：US07649491B2

公开(公告)日：2010-01-19

申请号：US11885973

申请日：2005-09-01

Applicant: Hideyuki Ohara ,  Takehiro Kawai ,  Keisuke Saito ,  Kosuke Hayama

Inventor： Hideyuki Ohara ,  Takehiro Kawai ,  Keisuke Saito ,  Kosuke Hayama

IPC: G01S3/08

CPC classification number: G01S13/84 ,  G01S13/38 ,  H04B5/0056 ,  H04B5/0062 ,  H04B17/27

Abstract: A transmission controller 7B is configured to transmit an R/W request signal for requesting transmission of a tag response signal to a RFID tag 1 twice. At this time, a frequency controller 7A controls a PLL section 5A to transmit the R/W request signal via different carrier frequencies. A phase information acquirer 8A detects a phase change amount of the tag response signal that is transmitted via different carrier frequencies. A distance calculator 8B calculates the distance between the reader/writer 2 and the RFID tag 1 on the basis of the phase change amount.

Abstract translation: 发送控制器7B被配置为向RFID标签1发送用于请求发送标签响应信号的R / W请求信号两次。 此时，频率控制器7A控制PLL部5A，经由不同的载波频率发送R / W请求信号。 相位信息获取器8A检测经由不同载波频率发送的标签响应信号的相位变化量。 距离计算器8B基于相位变化量来计算读取器/写入器2和RFID标签1之间的距离。