摘要:
The invention relates to a method for determining a distance (r) to a target object (200) consisting in transmitting electromagnetic waves in the form of a transmission signal (120a) by a transmitter (111a), receiving at least one part of said transmission signal (120a) reflected by a the target object (200) in the form of a reception signal (120c, 120d) by receiving device (111b) and evaluating the reception signal (120c, 120d) according a reference signal (1230b) which has a known phase difference with respect to the transmission signal (120a) and a frequency equal to the frequency thereof. The reference (120) and reception (120c, 120d) signal frequencies are reduced in a frequency divider (113) with the same predefined divider factor (x) while preserving the existing phase difference between the reference signal (120b) and the reception (120c, 120d) signal in such a way that a reduced frequency reception signal (120b′) and a reduced frequency reception signal (120d) are obtained. The frequency difference between the reduced frequency reception signal (120b′) and reduced frequency reception signal (120d′) is evaluated in order to determine the distance (R).
摘要:
An apparatus and a method for determining a distance (r) to a target object (200) proposes transmitting electromagnetic waves in the form of a transmission signal (120a) by a transmitter (111a), receiving at least one part of said transmission signal (120a) reflected by a the target object (200) in the form of a reception signal (120c, 120d) by receiving device (111b) and evaluating the reception signal (120c, 120d) according a reference signal (1230b) which has a known phase difference with respect to the transmission signal (120a) and a frequency equal to the frequency thereof. The reference (120) and reception (120c, 120d) signal frequencies are reduced in a frequency divider (113) with the same predefined divider factor (x) while preserving the existing phase difference between the reference signal (120b) and the reception (120c, 120d) signal in such a way that a reduced frequency reception signal (120b′) and a reduced frequency reception signal (120d) are obtained. The frequency difference between the reduced frequency reception signal (120b′) and reduced frequency reception signal (120d′) is evaluated in order to determine the distance (R).
摘要:
The invention relates to a driver assistance device (2) for a vehicle (1), which driver assistance device has a radar appliance (3, 4) for determining at least one measured variable (α1, α2, R1, R2) referenced to an object (10) that is external to the vehicle, wherein the radar appliance (3, 4) comprises: at least a first and a second reception antenna (14, 15), each for receiving signals (SE1, SE2), a first down-converter (17), which is coupled to the first reception antenna (14) via a first reception path (16), and a second down-converter (23), which is coupled to the second reception antenna (15) via a second reception path (21), each for down-converting the received signals (SE1, SE2) into respective baseband signals (SB1, SB2), and a control device (5) for receiving the baseband signals (SB1, SB2) and for determining the at least one measured variable (α1, α2, R1, R2) using the baseband signals (SB1, SB2), wherein the radar appliance (3, 4) has test means (32) for producing a local check signal (SP) and for coupling same check signal (SP) into the first reception path (16) and/or into the second reception path (21), as a result of which the control device (5) receives firstly the check signal (SP) that has been down-converted by the first down-converter (17) as a first test signal (ST1) and/or secondly the check signal (SP) that has been down-converted by the second down-converter (23) as a second test signal (ST2). The invention also relates to an appropriate method.
摘要:
Plug connections are proposed on radar sensors having plug pins which are inserted into plastic, in which the plastic (5, 6; 11) which surrounds the plug pins (4) is at least partially provided with a granulate which absorbs radar waves, such that the electrical impedance of the plastic (5; 11) has a high value in the low-frequency range, and the plastic (6) has a characteristic which absorbs radar waves in the region of higher-frequency radar waves. For this purpose, the plug pins (4) can be surrounded by a layer of plastic (5; 11) without radar-absorbent granulate, and the rest of the area surrounding the plug pins (4) consists of the plastic (6) with the granulate which absorbs radar waves.
摘要:
The invention relates to a motor vehicle with a radar device (3, 4) which is designed for detecting an object (25) located in a detection zone (7, 8) of the radar device (3, 4), wherein the detection zone (7, 8) is defined by an elevation angle zone (δ1, δ2) and an azimuth angle zone (α), wherein the elevation angle zone (δ1, δ2) also covers at least such a partial angle zone (δ1) which lies within an angle interval of 15° to 90° above a horizontal (33) defined with respect to the motor vehicle (1).
摘要:
Presented is a method for determining speeds (vr14, vr16) and distances (r14, r16) of objects (14, 16) relative to a radar system (12) of a motor vehicle (10), wherein a coverage area (EB) of the radar system (12) is divided into at least two part-areas (TB1, TB2, TB3), the coverage area (EB) is examined for reflecting objects (14, 16) in successive measuring cycles (MZ1, MZ2; MZi, MZi+1), wherein radar signals received in a measuring cycle (MZ1, MZ2; MZi, MZi+1) are processed separated in accordance with part-areas (TB1, TB2, TB3) and processed signals are assembled to form a total result differentiated in accordance with spatial directions. The method is characterized in that from signals received in a first measuring cycle (MZ1; MZi), hypotheses for the distance (r14, r16) and speed (vr14, vr16) of reflecting objects (14, 16) are formed and the hypotheses are validated in dependence on signals received in at least one further measuring cycle (MZ2; MZi+2). Furthermore, a radar system (12) is presented which carries out such a method.
摘要:
The invention relates to an assistance system for motor vehicles (20), said system having a distance detection system (4) and a warning system (6), wherein provision is made of an evaluation unit (18) which combines items of information (12, 14, 16) obtained by the distance detection system (4) and by the warning system (6). The invention also relates to a method for operating an assistance system (2).
摘要:
A method for operating an antenna assembly (100) produces a desired overall directional dependence. The antenna assembly (100) comprises at least one first partial antenna (R1) and a second partial antenna (R1+R2), which are disposed relative to each other in such a manner that the individual directional dependences of the partial antennas at least partially overlap. The first partial antenna (R1) is associated with a first antenna signal which represents a radio signal for receiving or transmitting via the first partial antenna (R1), and the second partial antenna (R1+R2) is associated with a second antenna signal which represents a radio signal for receiving or transmitting via the second partial antenna. Through cyclic, alternating operation of the first and second partial antennas, a third antenna signal can be generated which represents the radio signal for receiving or transmitting through the antenna assembly (100) and with the desired overall directional dependence via overlapping, individual directional dependences of the partial antennas (R1, R1+R2). The third antenna signal is generated through mathematical linking of the first and second antenna signals—.
摘要翻译:一种用于操作天线组件(100)的方法产生期望的整体方向依赖性。 天线组件(100)包括至少一个第一部分天线(R 1)和第二局部天线(R 1 + R 2),它们彼此相对设置,使得部分天线的各个方向依赖性 至少部分重叠。 第一部分天线(R 1)与表示用于经由第一部分天线(R 1)接收或发送的无线电信号的第一天线信号相关联,并且第二局部天线(R 1 + R 2)与 第二天线信号,其表示用于经由第二部分天线接收或发送的无线电信号。 通过第一和第二部分天线的循环,交替操作,可以生成表示用于通过天线组件(100)接收或传输的无线电信号的第三天线信号,并且通过重叠的各个方向依赖性 部分天线(R 1,R 1 + R 2)。 第三天线信号通过第一和第二天线信号的数学链接产生。
摘要:
The invention relates to an assistance system for motor vehicles (20), said system having a distance detection system (4) and a warning system (6), wherein provision is made of an evaluation unit (18) which combines items of information (12, 14, 16) obtained by the distance detection system (4) and by the warning system (6). The invention also relates to a method for operating an assistance system (2).
摘要:
The invention relates to a method for unambiguous determination of a range to and/or of a relative velocity of an object with respect to a motor vehicle (1) by means of a frequency-modulation continuous-wave radar (3, 4) in the motor vehicle (1), with a predetermined sequence of frequency-modulated signal pulses (23) being transmitted by the frequency-modulation continuous-wave radar (3, 4) in a measurement cycle, by means of which sequence an unambiguity area (RUn) is determined for the range, and/or an unambiguity area (VUn) is determined for the relative velocity, wherein mutually different unambiguity areas (RUn) for the range and/or mutually different unambiguity areas (VUn) for the relative velocity are defined for at least two successive measurement cycles, and the range and/or the relative velocity are/is determined on the basis of in each case at least one measured value for the range and/or for the relative velocity from each measurement cycle.