Abstract: A low scattering turntable for improving quiet zone test performance and a quiet zone test method is provided, and relates to the technical field of quiet zone test. The low scattering turntable includes an L-shaped baffle, a rhombic inclined wedge supporting column, a bottom plate, a turntable base, a fixed block, a longitudinal rotating shaft and a transverse rotating shaft. In the disclosure, the rhombic inclined wedge supporting column is adopted, the sharp wedge diffraction and traveling wave scattering effects are reduced. Multi-layer side wave-absorbing materials layout are used in the rhombic inclined wedge supporting column, which can effectively reduce electromagnetic reflection and scattering in a wide frequency range. By adding sawtooth wave-absorbing material to the edge of L-shaped baffle, the reflection intensity of electromagnetic wave is reduced and the overall wave-absorbing efficiency is improved. The oval bottom plate is adopted to reduce the measurement error.

Abstract: The present disclosure provides a vehicle auxiliary installation fixing device and a fixing method, wherein the device comprises a frame body, the frame body comprises a pair of side brackets and a pair of end brackets, the pair of side brackets are parallel to each other and both extend along a first direction, the pair of end brackets are arranged along a second direction, the end brackets are arc-shaped and connected with the ends of the same ends of the pair of side brackets, and the second direction is perpendicular to the first direction; the frame body is lined with wave-absorbing material; two groups of fixing components arranged in a first direction. The device can prevent the position of the vehicle under test from moving when the rotating bracket rotates, and avoid the problem of inaccurate test result caused by the scattering of electromagnetic waves by the device itself.

Abstract: The present disclosure provides a wireless performance testing method and system based on quiet zone expansion in a compact antenna test range. The wireless performance testing method is implemented based on a wireless performance testing device and includes: to acquire an original phase of the feed antenna; rotate the turntable to obtain a first scattering parameter of the device under test; input the first distance to a phase compensation model to obtain a compensation phase; adjust the original phase of the feed antenna to the adjusted phase; rotate the turntable to obtain a second scattering parameter of the device under test; move the feed antenna along the first straight line repeatedly to different positions to obtain a plurality of the second scattering parameters. The wireless performance testing method can increase the size of the test quiet zone under the condition that the reflecting surface size is certain.

Abstract: The present application relates to the field of data consistency testing, and provides a method and device for testing vehicle data consistency in V2X. The method includes: collecting vehicle V2X test data transmitted based on a V2X-PC5 communication protocol; parsing the V2X test data, and determining whether a format and a data value of parsed data conform to a preset definition, and whether the parsed data is consistent with operating data in testing, to obtain a data structure consistency result; calculating an average error value between dynamic data in the parsed data and data collected by a high-precision inertial navigation device when time stamps are aligned and data sampling frequencies are the same; and according to the data structure consistency result and the average error value, determining whether vehicle data conforms to a preset consistency standard.

Abstract: This application relates to the technical field of connectivity communication, and provides an apparatus and method for testing a connected vehicle's communication distance. The testing apparatus includes a support member, and a first antenna is provided on the support member and connected to a signal transceiver. The signal transceiver is configured to send signals to a tested vehicle or receive signals sent by the tested vehicle. An output terminal of the signal transceiver is connected to an upper computer. Data analysis software is installed on the upper computer, and used for recording a test distance and a number of data packets and calculating a packet loss rate, such that a maximum communication distance is obtained according to the test distance and the corresponding packet loss rate.

Abstract: Disclosed is a test device and method for remote control parking, falling within the technical field of testing. The method provided by the present disclosure includes the following steps: responding to a remote control parking instruction sent by a portable terminal, and acquiring position and pose data of a vehicle in real-time; injecting function loss conditions; determining a stopping position of the vehicle according to the position and pose data if an alarm signal or a parking success signal sent by an in-vehicle infotainment system is received; and determining a test result of remote control parking according to the stopping position of the vehicle and the function loss conditions. The present disclosure is used to test the response of a vehicle parking under the function loss condition.