A test system and method for FM radio interference in real vehicles
A test system and real vehicle technology, applied in receiver monitoring and other directions, can solve problems such as inability to accurately simulate real vehicle radio interference and difficult test environments, and achieve the effect of reducing multi-path interference and ensuring stability.
Active Publication Date: 2021-05-25
HUIZHOU DESAY SV AUTOMOTIVE
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Problems solved by technology
[0006] The present invention provides a test system and method for FM radio interference in a real vehicle. The technical problem to be solved is that the existing bench test method cannot accurately simulate the radio interference inside the real vehicle, and it is difficult to quickly build it on the real vehicle. a stable test environment
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[0049] The embodiment of the present invention will be explained in detail below in conjunction with the accompanying drawings. The examples are provided only for the purpose of illustration and cannot be interpreted as a limitation of the present invention. The accompanying drawings are only used for reference and description, and do not constitute the scope of patent protection of the present invention. limitations, since many changes may be made in the invention without departing from the spirit and scope of the invention.
[0050] A module structure diagram of a test system for a real vehicle FM radio interference provided by an embodiment of the present invention, as shown in figure 1As shown, in this embodiment, a kind of test system of real car FM radio interference provided by the present invention is provided with portable media device 1, and the FM transmission circuit that is positioned at the vehicular electronic system that is connected with described portable medi...
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The invention relates to the technical field of vehicle testing, and specifically discloses a test system and method for FM radio interference in a real vehicle. The system is provided with a portable media device and an FM transmission circuit connected thereto, a signal processing and comparison display circuit, and a The vehicle-mounted host connected to the signal processing and the contrast display circuit, the FM transmitting circuit is provided with an FM transmitting antenna, and the vehicle-mounted host is provided with a radio antenna. The present invention provides a test system and method for FM radio interference in a real vehicle. By comparing the initial test signal (1kHz) with the demodulated output signal of the vehicle machine in real time, the distortion of the output waveform of the real vehicle can be monitored at any time. Once the vehicle machine The demodulated signal waveform will be distorted by the interference of electrical equipment on the car, such as wipers. Through real-time dual-channel visual comparison with the original 1kHz modulation signal, it is helpful to quickly locate the interference source of the real car and radio for the real car. The sound effect review provides an important basis.
Description
technical field [0001] The invention relates to the technical field of vehicle testing, in particular to a testing system and method for FM radio interference in real vehicles. Background technique [0002] At present, the main methods of testing the FM radio interference of the car audio host are as follows: [0003] 1. Bench test: Build a test environment with an audio analyzer and a radio frequency signal transmitter to conduct parameter performance tests. Its disadvantage is that it is separated from the real car environment and cannot simulate the device operation interference that the audio head unit receives in the real car environment; [0004] 2. Real vehicle subjective feeling test: use the radio function according to the actual user's use environment, and make a judgment through the tester's subjective hearing experience on the real car. The disadvantage is that there are too many external interferences in the actual radio use environment, and it is difficult to...
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IPC IPC(8): H04B17/20H04B17/23H04B17/26
CPCH04B17/20H04B17/23H04B17/26
Inventor 罗超苏振鹏韩涛
Owner HUIZHOU DESAY SV AUTOMOTIVE