| 摘要 |
A first step sets a second inclination angle of a housing to an angle different from a reference housing angle by a limit angle; drives an actuator to set a first inclination angle to an angle different from a substrate inclination angle by the limit angle such that a beam axis is kept to be oriented to a specified direction; and measures, based on transmission and reception of a radar beam, first received power. A second step drives the actuator to set the first inclination angle to an angle located outside the adjustment range by a predetermined additional angle while the first inclination angle is maintained; and measures, based on transmission and reception of the radar beam, second received power. A third step determines whether a difference between the first received power and the second received power is greater than a predetermined determination threshold, and checks an operating state of the actuator based on a result of the determination. |
| 主权项 |
1. A checking method for a radar device as a checking target, the radar device comprising:
an antenna substrate having a beam transmitting surface on which an antenna having a predetermined beam axis is formed; a housing in which the antenna substrate is installed, the housing having a first reference surface having a predetermined positional relationship with respect to a predetermined checking reference surface, the housing supporting the antenna substrate such that a first inclination angle of the beam transmitting surface with respect to the first reference surface is changeable; an actuator installed in the housing and configured to change the first inclination angle to change an orientation of the beam axis of the antenna along a direction defined relative to the checking reference surface; and a measuring unit that transmits a radar beam via the beam transceiver surface of the antenna substrate, and receives a reflected beam based on the transmitted radar beam to measure received power, the checking method checking whether the actuator operates over an operating range corresponding to a predetermined adjustment range for the first inclination angle, the checking method comprising: a step of providing checking equipment comprising:
a housing support configured to:support the housing such that a second inclination angle of the first reference surface with respect to a second reference surface is changeable, andchange the second inclination angle to change the orientation of the beam axis along a direction defined relative to the second reference surface, the second reference surface being defined as a surface substantially parallel to the first reference surface when the first reference surface is substantially perpendicular to the checking reference surface; and
a reflector configured to reflect the transmitted radar beam and located to maximize the received power measured by the measuring unit based on a reflected radar beam when the beam axis of the radar device supported by the housing support is oriented to a specified direction, a value of the first inclination angle, at which the beam axis is oriented to the specified direction when the second inclination angle is set to a predetermined reference housing angle, being defined as a reference substrate angle, a value of the first inclination angle of the antenna substrate corresponding to a limit of the adjustment range being defined as a limit angle; a first step of:
setting the second inclination angle of the housing to an angle different from the reference housing angle by the limit angle;driving the actuator to set the first inclination angle to an angle different from the substrate inclination angle by the limit angle such that the beam axis is kept to be oriented to the specified direction; andtransmitting, by the measuring unit, a radar beam via the beam transceiver surface and receiving a reflected beam based on the transmitted radar beam to thereby measure first received power; a second step of:
driving the actuator to set the first inclination angle to an angle located outside the adjustment range by a predetermined additional angle while the first inclination angle of the antenna substrate is maintained; andtransmitting, by the measuring unit, a radar beam via the beam transceiver surface and receiving a reflected beam based on the transmitted radar beam to thereby measure second received power; and a third step of:
determining whether a difference between the first received power as a measurement result from the first step and the second received power as a measurement result from the second step is greater than a predetermined determination threshold; andchecking an operating state of the actuator based on a result of the determination. |
