Test system and test method

Abstract

The invention discloses a test system and a test method. The test system comprises: a horizontal support, on which an antenna holder is arranged, the antenna holder being used for holding a microstrip line antenna; the vertical bracket is used for supporting the horizontal bracket; and an adapter which is connected with the microstrip line antenna and is used for adjusting impedance. According to the test system, the test cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of testing methods, and in particular to a testing system and a testing method using such a testing system. Background Art

[0002] In modern cars, electronic devices are used more and more widely. With the increase of electronic devices, the vehicle radiation interference and vehicle radiation immunity of automotive electronics have become particularly important. Electromagnetic compatibility testing can help ensure that its automotive electronic devices will not interfere with other electronic devices and operate normally in complex electromagnetic environments.

[0003] Among them, in the whole vehicle radiation immunity test, the microstrip line antenna needs to be within the frequency range of 1.5-30MHz, the voltage standing wave ratio VSWR is less than 2.5, S 11 The parameter is less than -10dB, and the maximum electric field strength in the test area can reach 100V / m. In the subjective evaluation test of the vehicle radio, the microstrip antenna needs to ensure that the vehicle radio has good signal strength and audio quality under a specific signal strength without being affected by the environment. Summary of the invention

[0004] The present invention provides a testing system which can reduce the testing cost.

[0005] A testing system according to one aspect of the present invention comprises:

[0006] A horizontal support, on which an antenna holder is provided, and the antenna holder is used to hold a microstrip line antenna;

[0007] A vertical support, the vertical support being used to support the horizontal support; and

[0008] A conversion joint is connected to the microstrip antenna and is used to adjust impedance.

[0009] According to a test system provided in one aspect of the present invention, the test system includes a ground plate, wherein the ground plate is connected to a microstrip antenna and is used for grounding.

[0010] According to the testing system provided in one aspect of the present invention, the horizontal support includes two longitudinal supports and a plurality of transverse supports.

[0011] According to a testing system provided in one aspect of the present invention, a plurality of antenna holders are provided on each transverse support.

[0012] According to the testing system provided in one aspect of the present invention, the horizontal support, the antenna holder and the vertical support are made of insulating material.

[0013] According to the testing system provided in one aspect of the present invention, the horizontal support, the antenna holder and the vertical support are made of wood.

[0014] According to the test system provided in one aspect of the present invention, each antenna holder is used to hold two microstrip line antennas parallel in a vertical plane.

[0015] In addition, the present invention provides a test method, which uses the aforementioned test system for whole vehicle radiation immunity test and whole vehicle radio subjective evaluation test. Since the test method uses the test system according to the present invention, it can have the advantages as described above.

[0016] According to a testing method provided in one aspect of the present invention, the testing method is carried out in a small semi-anechoic chamber.

[0017] According to a testing method proposed in one aspect of the present invention, the length of the microstrip antenna, the height difference between the microstrip antenna and the ground plane, and the interval between the microstrip antennas are adjusted according to voltage standing wave ratio and return loss characteristics.

[0018] The beneficial effects of the present invention include: through the set test system, the whole vehicle radiation immunity test and the whole vehicle radio subjective evaluation test can be carried out simultaneously, thereby reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. Among them:

[0020] Figure 1 A test system according to an embodiment of the present invention is schematically shown;

[0021] Figure 2 Schematically shows Figure 1 The simulation structure of the test system in . DETAILED DESCRIPTION

[0022] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0023] According to one embodiment of the present invention, Figure 1 and Figure 2It is shown, in which it can be seen that the test system includes: a horizontal support 1, on which an antenna holder 5 is provided, and the antenna holder is used to hold a microstrip antenna 6; a vertical support 2, the vertical support is used to support the horizontal support; and a conversion joint 3, which is connected to the microstrip antenna and is used to adjust the impedance. The conversion joint is placed on an aluminum support with an adjustable position, for example. The vehicle to be tested is placed under the horizontal support and is affected by the electromagnetic waves emitted by the microstrip antenna. The microstrip antenna can also be used to transmit analog signals in the subjective evaluation test of the vehicle radio.

[0024] In the test system according to this embodiment, the whole vehicle radiation immunity test and the whole vehicle radio subjective evaluation test can be carried out simultaneously through the set test system, reducing the test arrangement time and the required manpower, thereby reducing the test cost. The test system is suitable for a small semi-anechoic chamber, which can reduce the test cost and time in an external laboratory. It solves the problem of poor test repeatability caused by unstable signal strength in a natural environment, thereby improving test efficiency. It has the advantages of low test cost, reduced test time, and high test repeatability.

[0025] Furthermore, the test system comprises a ground plate 4, which is connected to the microstrip antenna and is used for grounding.

[0026] Specifically, the horizontal support 1 includes two longitudinal supports 11 and a plurality of transverse supports 12. The longitudinal supports correspond to the longitudinal direction of the vehicle to be tested, and the transverse supports correspond to the transverse direction of the vehicle to be tested. A plurality of antenna holders are arranged on each transverse support. The antenna holders on different transverse supports are arranged in a row in the longitudinal direction, so that the microstrip line antenna extends in the longitudinal direction.

[0027] The horizontal support, the antenna holder and the vertical support are made of insulating material. For example, the horizontal support, the antenna holder and the vertical support are made of wood.

[0028] Each antenna holder is used to hold two microstrip antennas parallel in the vertical plane. That is, each antenna holder corresponds to a pair of two microstrip antennas, and each pair of microstrip antennas is also parallel to each other in the horizontal plane.

[0029] The present invention also includes a testing method, which utilizes the testing system of any one or more of the aforementioned embodiments for whole vehicle radiation immunity testing and whole vehicle radio subjective evaluation testing. The technical features and technical effects thereof correspond to the previous description, so they will not be repeated here.

[0030] According to one embodiment of the present invention, the test method is performed in a small semi-anechoic chamber. Further, the length of the microstrip antenna, the height difference between the microstrip antenna and the ground plane, and the interval between the microstrip antennas are determined according to the voltage standing wave ratio VSWR and the return loss characteristic S 11 to adjust.

[0031] The beneficial effects of using a test system or a test method according to an embodiment of the present invention include:

[0032] Test time: Since this solution is applicable to the whole vehicle radiation immunity test and the whole vehicle radio subjective evaluation test, the antenna only needs to be built in one test and can be used in both tests, so the test layout time can be effectively reduced. And the appointment and test time in the external laboratory can be omitted.

[0033] Cost: On the premise of completing the test task, this solution is applied to a small semi-anechoic chamber. The required structural size is much smaller than other similar antennas, and the supporting material required for the antenna is wood, so the production cost is greatly reduced. It can also save the test costs in external laboratories, and it is estimated that the test costs can be saved by more than one million per year.

[0034] Test repeatability: In the subjective evaluation test of the vehicle radio, the test vehicle needs to have good signal strength and audio quality under a specific signal strength without being affected by the environment. However, the natural environment is complex and changeable, which can easily lead to unstable signal strength of the vehicle radio and reduce audio quality. Therefore, the subjective evaluation test of the vehicle radio is prone to problems such as low repeatability and low test efficiency. This solution is suitable for a small semi-anechoic chamber, which can complete the subjective evaluation test of the vehicle radio in the dark room, and can solve the problem of poor test repeatability caused by unstable signal strength in the natural environment, thereby improving test efficiency.

[0035] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A testing system, characterized in that: The test system comprises: A horizontal support, on which an antenna holder is provided, and the antenna holder is used to hold a microstrip line antenna; A vertical support, the vertical support being used to support the horizontal support; and A conversion joint is connected to the microstrip antenna and is used to adjust impedance.

2. The test system according to claim 1, characterized in that: The test system includes a ground plate connected to the microstrip line antenna and used for grounding.

3. The test system according to claim 1, characterized in that: The horizontal support includes two longitudinal supports and a plurality of transverse supports.

4. The test system according to claim 3, characterized in that: A plurality of antenna holders are arranged on each transverse support.

5. The test system according to claim 1, characterized in that: The horizontal support, the antenna holder and the vertical support are made of insulating material.

6. The test system according to claim 5, characterized in that: The horizontal support, the antenna holder, and the vertical support are made of wood.

7. The test system according to claim 1, characterized in that: Each antenna holder is used to hold two microstrip line antennas parallel in a vertical plane.

8. A testing method, which utilizes the testing system according to any one of claims 1 to 7 for whole vehicle radiation immunity testing and whole vehicle radio subjective evaluation testing.

9. The testing method according to claim 8, characterized in that: The test method is carried out in a small semi-anechoic chamber.

10. The testing method according to claim 8, characterized in that: The length of the microstrip line antenna, the height difference between the microstrip line antenna and the ground plane, and the interval between the microstrip line antennas are adjusted according to the voltage standing wave ratio and the return loss characteristics.

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