Device and method for determining the position of communication antenna in vehicle anti-electromagnetic interference test

Abstract

The present application provides a device and method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test, the device comprising: an anti-interference antenna, a networked communication test device and a signal power strength detector; the signal power strength detector and the networked communication test device are placed outside a semi-anechoic chamber, and the communication antenna is connected to the signal power strength detector or the networked communication test device through a coaxial cable; the anti-interference antenna is used to receive electromagnetic signals in the darkroom and transmit them to the communication antenna; the communication antenna is used to receive electromagnetic signals transmitted by the anti-interference antenna and transmit the electromagnetic signals to the signal power strength detector; the signal power strength detector is used to receive electromagnetic signals transmitted by the communication antenna and detect the power strength of the electromagnetic signals; the communication antenna is also used to transmit data of a target vehicle to the networked communication test device, so that the networked communication test device tests its own communication status with the target vehicle. The present application improves the safety of the networked communication test device.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle anti-electromagnetic interference testing, and in particular to a device and method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference testing. Background Art

[0002] At present, there are no clear regulations on the location of communication antennas in the construction of communication scenarios in the anti-electromagnetic interference test of intelligent connected vehicles. This leads to the problem of random location of communication antennas during the scene construction process. Due to the particularity of the anti-electromagnetic interference test room (semi-anechoic chamber), when building a car network communication scenario during the anti-electromagnetic interference test, the target vehicle to be tested and the communication antenna need to be placed in the darkroom, and the network communication test equipment needs to be placed outside the darkroom. An antenna is also installed on the target vehicle, which can interact with the communication antenna in the darkroom for communication signals. The communication antenna is connected to the network communication test equipment through a coaxial cable, and the network communication test equipment or the vehicle end (depending on the specific communication) is used to detect whether the target vehicle can communicate normally with it.

[0003] When conducting electromagnetic interference resistance tests for intelligent networked vehicle communications, interference-resistant antennas and communication antennas are indispensable equipment. However, when conducting electromagnetic interference resistance tests, electromagnetic wave signals of a certain frequency and intensity must be emitted in a darkroom. Since the antenna can receive signals as soon as it emits them, the networked communication test equipment will inevitably receive electromagnetic interference resistance signals from the darkroom. The random position selection of the communication antenna results in uncertainty in the signal power strength fed back to the networked communication test equipment, which in turn may damage the networked communication test equipment. Summary of the invention

[0004] The present application provides a device and method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test, so as to solve the problems in the above-mentioned background technology.

[0005] In a first aspect, the present application provides a device for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test, comprising: an anti-interference antenna, a networked communication test device, and a signal power strength detector;

[0006] The anti-interference antenna and the communication antenna are placed in a semi-anechoic chamber, the signal power strength detector and the networked communication test equipment are placed outside the semi-anechoic chamber, the communication antenna is connected to the signal power strength detector or the networked communication test equipment through a coaxial cable, and an electromagnetic field with a predetermined field strength is diffused in the semi-anechoic chamber when an anti-electromagnetic interference test is performed;

[0007] The anti-interference antenna is used to receive an electromagnetic signal with a predetermined field strength, and emit the electromagnetic signal in the semi-anechoic chamber, and the communication antenna will receive the electromagnetic signal;

[0008] When the communication antenna is connected to the signal power strength detector, the communication antenna is used to receive the electromagnetic signal emitted by the anti-interference antenna and transmit the electromagnetic signal to the signal power strength detector through a coaxial cable; the signal power strength detector is used to receive the electromagnetic signal transmitted by the communication antenna and detect the power strength of the electromagnetic signal;

[0009] When the communication antenna is connected to the networked communication test device, the communication antenna is used to transmit the communication signal of the target vehicle to the networked communication test device, so that the networked communication test device tests itself to establish a communication connection with the target vehicle.

[0010] Optionally, a signal power attenuator is connected between the communication antenna and the signal power strength detector, and the signal power attenuator is placed outside a semi-anechoic chamber.

[0011] Optionally, the signal power strength detector is a spectrum analyzer, and the networked communication test equipment is a cellular communication device, a V2X communication device or a navigation communication device, etc.

[0012] Optionally, the determining device further comprises a server, and the server comprises: a memory and one or more processors;

[0013] The memory is used to store one or more instructions;

[0014] The one or more processors are used to execute the one or more instructions;

[0015] When the one or more instructions are executed by the one or more processors, the one or more processors implement a predetermined method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test.

[0016] Optionally, a computer program is stored on the server, and when the computer program is executed by the processor, a predetermined method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test is implemented.

[0017] Optionally, a computer program product is installed on the server, and when the computer program is executed by the processor, a method for determining the position of a communication antenna in a predetermined vehicle anti-electromagnetic interference test is implemented.

[0018] In a second aspect, the present application provides a method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test, which is applied to the above-mentioned communication antenna position determination device in the vehicle anti-electromagnetic interference test, comprising:

[0019] Receiving at least one intended position for placing a communication antenna input by a user through a terminal display interface;

[0020] Based on a predetermined determination rule, determining a confirmed position where the communication antenna can be placed from the intended positions, and storing the position;

[0021] When a communication antenna position acquisition request is received, the previously determined confirmed position of the communication antenna is acquired and displayed.

[0022] Optionally, when the anti-interference antenna is located at a first predetermined distance in the southeast direction of the hub, the intended position includes: centered on the hub, at a second predetermined distance north of the hub, at a third predetermined distance south of the hub, and at a fourth predetermined distance east of the hub, and the hub is a device for placing a target vehicle.

[0023] Optionally, before receiving at least one intended position for placing a communication antenna input by a user through a terminal display interface, the method further includes:

[0024] Determine the main lobe range of the anti-interference antenna;

[0025] Determine a first relationship between the electromagnetic signal frequency and the electromagnetic signal power intensity in the semi-anechoic chamber, wherein the electromagnetic signal power intensity is detected by an electromagnetic signal power intensity detector;

[0026] Determine a second relationship between the antenna distance between the communication antenna and the anti-interference antenna and the power intensity of the electromagnetic signal;

[0027] storing the main lobe range, the first relationship, and the second relationship;

[0028] When an acquisition request for acquiring the main lobe range, the first relationship, and the second relationship is received, the main lobe range, the first relationship, and the second relationship are acquired and displayed.

[0029] Optionally, determining a confirmed position where the communication antenna can be placed from the intended position includes:

[0030] For each of the intended positions, obtaining the electromagnetic signal power strength detected by the signal power strength detector;

[0031] When the power intensity of the electromagnetic signal is greater than the rated power of the networked communication test device, determining that the current intended position is an unconfirmed position;

[0032] When the electromagnetic signal power intensity is less than the rated power of the networked communication test device, determining the communication state between the target vehicle and the networked communication test device;

[0033] When the communication state is a normal state, the current intended position is determined to be a confirmed position where the communication antenna can be placed.

[0034] The communication antenna position determination device in the vehicle anti-electromagnetic interference test provided in the embodiment of the present application is provided with a networked communication test device and a signal power strength detector; for different intended positions of the communication antenna, the signal strength that may be received by the networked communication test device is detected by the signal power strength detector, and the communication status between the networked communication test device and the target vehicle is tested by the networked communication test device; in order to find the position of the communication antenna that can make the signal power strength less than the rated power of the networked communication test device and ensure normal communication between the target vehicle and the networked communication test device; compared with the prior art, when conducting a vehicle anti-electromagnetic interference test, the position of the communication antenna is selected arbitrarily or directly selected based on its own experience, resulting in the power intensity received by the networked communication test device being greater than its own rated power, thereby damaging the networked communication test device; the communication antenna position determination device in the vehicle anti-electromagnetic interference test provided in the present application determines the position of the communication antenna that can ensure normal communication without damaging the networked communication test device through the signal power strength detector and the networked communication test device, thereby improving the safety of the use of the networked communication test equipment and ensuring the smooth progress of the vehicle anti-electromagnetic interference test. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 A schematic diagram of a device for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of another device for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of a communication antenna position determination device in a vehicle anti-electromagnetic interference test provided in another embodiment of the present application;

[0039] Figure 4 A flow chart of a method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of the intended position of a communication antenna shown in an embodiment of the present application;

[0041] Figure 6A flow chart of a method for determining the position of a communication antenna in another vehicle anti-electromagnetic interference test provided in an embodiment of the present application;

[0042] Figure 7 A graph showing a received signal strength changing with frequency provided in an embodiment of the present application;

[0043] Figure 8 A curve diagram showing received signal strength changing with distance provided in an embodiment of the present application;

[0044] Fig. 9 A curve diagram showing how received signal strength varies with distance provided in another embodiment of the present application;

[0045] Fig.10 A curve diagram showing how received signal strength varies with distance provided in another embodiment of the present application;

[0046] Fig.11 A flowchart of determining a confirmed position from an intended position provided in an embodiment of the present application;

[0047] Fig.12 It is a structural diagram of a computer system according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also belong to the scope of protection of the present application. In addition, it should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the absence of conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0049] Figure 1 A device for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test is shown in an embodiment of the present application, comprising: an anti-interference antenna, a networked communication test device and a signal power strength detector.

[0050] The anti-interference antenna and the communication antenna are placed in a semi-anechoic chamber, the signal power strength detector and the networked communication test equipment are placed outside the semi-anechoic chamber, the communication antenna is connected to the signal power strength detector or the networked communication test equipment through a coaxial cable, and an electromagnetic field with a predetermined field strength is diffused in the semi-anechoic chamber when an anti-electromagnetic interference test is performed;

[0051] The anti-interference antenna is used to receive an electromagnetic signal with a predetermined field strength, and transmit the electromagnetic signal into the semi-anechoic chamber, and the communication antenna will receive the electromagnetic signal transmitted by the anti-interference antenna;

[0052] When the communication antenna is connected to the signal power strength detector, the communication antenna is used to receive the electromagnetic signal emitted by the anti-interference antenna and transmit the electromagnetic signal to the signal power strength detector through a coaxial cable; the signal power strength detector is used to receive the electromagnetic signal transmitted by the communication antenna and detect the power strength of the electromagnetic signal;

[0053] When the communication antenna is connected to the networked communication test device, the communication antenna is used to transmit the communication signal of the target vehicle to the networked communication test device, so that the networked communication test device tests the communication status between the networked communication test device and the target vehicle.

[0054] The communication antenna is the communication antenna whose position needs to be determined.

[0055] Among them, an electromagnetic field generating source, a power amplifier, etc. are also placed outside the semi-anechoic chamber to generate an electromagnetic field of a predetermined field strength.

[0056] Furthermore, a rotating hub is placed in the semi-anechoic chamber, and the rotating hub is used to place a target vehicle, that is, a vehicle that needs to undergo an anti-electromagnetic interference test.

[0057] During the anti-electromagnetic interference test, the anti-interference antenna is used to receive electromagnetic signals of a predetermined field strength and transmit the electromagnetic signals to the vehicle, thereby performing an anti-electromagnetic interference test on the vehicle.

[0058] During the anti-electromagnetic interference test, the communication antenna is used to establish a communication connection with the target vehicle and transmit the communication signal of the target vehicle to the networked communication test equipment so as to test the communication status between the target vehicle and the networked communication test equipment through the networked communication test equipment.

[0059] However, due to the characteristics of the antenna itself, during the test, the communication antenna will inevitably receive the electromagnetic signal emitted by the anti-interference antenna and transmit the electromagnetic signal to other detection equipment connected to the communication antenna. If the power of the electromagnetic signal is too large, it will damage the network communication test equipment. Therefore, it is necessary to first test the power strength of the transmitted electromagnetic signal with a signal power strength tester, that is, in the process of determining the position of the communication antenna, use a signal power strength tester to simulate the network communication test equipment when conducting vehicle anti-electromagnetic interference tests.

[0060] The parameters of the communication antenna used in this application are shown in Table 1 below:

[0061] Table 1

[0062]

[0063] The use process of the communication antenna position determination device in the vehicle anti-electromagnetic interference test provided in the embodiment of the present application is as follows:

[0064] placing a communication antenna at a first intended location;

[0065] Start the electromagnetic interference system in the semi-anechoic chamber, generate an electromagnetic field with a predetermined field strength through an electromagnetic field generating source, and diffuse the electromagnetic field in the semi-anechoic chamber;

[0066] The anti-interference antenna receives the electromagnetic signal and transmits it in a semi-anechoic chamber, and both the vehicle and the communication antenna can receive the electromagnetic signal;

[0067] The communication antenna receives the electromagnetic signal and transmits it to the signal power strength detector;

[0068] Check the signal power strength reading detected by the signal power strength detector;

[0069] Compare the reading to the power rating of the network communication test equipment (the maximum power intensity that the network communication equipment can withstand);

[0070] If the reading is greater than the rated power of the network communication test equipment, it means that the signal power strength received by the signal power strength tester is greater than the rated power of the network communication test equipment, and the current position of the communication antenna does not meet the requirements;

[0071] Then move the communication antenna to the next intended position and repeat the above operation until the reading is less than the rated power of the network communication test equipment;

[0072] If the reading is less than the rated power of the networked communication test device, remove the signal power detection device and connect the networked communication test device to the communication antenna to determine the communication status between the target vehicle and the networked communication test device;

[0073] If the communication status is normal, the current intended position of the communication antenna may be determined as a confirmed position where the communication antenna may be placed;

[0074] If the communication status is abnormal, change the position of the communication antenna and re-perform the above operations until the reading of the signal power strength detector is found to be less than the rated power of the networked communication test equipment and the communication status between the target vehicle and the networked communication test equipment is normal, and determine this position as the above-mentioned confirmed position.

[0075] When conducting an anti-electromagnetic interference test, when the communication antenna is placed in the confirmed position, the electromagnetic interference signal will neither damage the networked communication test equipment nor allow the networked communication test equipment to communicate normally with the target vehicle.

[0076] Furthermore, multiple intended positions can be determined in advance, and the above operation can be performed for each intended position, and multiple confirmed positions where the communication antenna can be placed can be determined from the multiple intended positions. In this way, when conducting an anti-electromagnetic interference test, a confirmed position suitable for the current situation can be selected from the multiple confirmed positions according to the placement of the instrument in the semi-anechoic chamber.

[0077] Alternatively, see Figure 2 A signal power attenuator is connected between the communication antenna and the signal power strength detector, and the signal power attenuator is placed outside the semi-radio darkroom.

[0078] The signal power attenuator is used to attenuate the signal power received by the communication antenna to prevent the signal power received by the signal power strength detector from being too high. The signal power attenuator plays a role in protecting the link and equipment.

[0079] The attenuation capacity of the signal power attenuator can be determined according to the electromagnetic signal strength emitted by the anti-interference antenna in the actual semi-anechoic chamber. For example, a signal power attenuator with a 20dB attenuation capacity is selected.

[0080] Optionally, the signal power strength detector is a spectrum analyzer, and the networked communication test equipment is a cellular communication device, a V2X communication device or a navigation communication device, etc.

[0081] Vehicle-to-vehicle wireless communication technology (V2X for short).

[0082] Of course, the signal power strength detector can also be other devices, and this application takes a spectrum analyzer as an example.

[0083] The selection of networked communication test equipment is determined based on the test content when actually conducting anti-electromagnetic interference. If it is necessary to test the cellular communication anti-interference status of the target vehicle, the networked communication test equipment selects cellular communication equipment.

[0084] Alternatively, see Figure 3 , the communication antenna position determination device also includes a server, and the server is communicatively connected with the signal power strength detector and the networked communication test equipment;

[0085] The server is used to process the signal power strength data received by the signal power strength detector, and determine the relationship between the strength data and the rated power of the network communication test equipment;

[0086] The server is also used to receive communication data sent by the networked communication test device, and determine whether the communication status between the networked communication test device and the target vehicle is normal based on the communication data;

[0087] The server is further configured to determine whether the current intended location can be determined as a confirmed location based on the size relationship and the communication status.

[0088] For a more detailed confirmation method for determining the confirmation position, please refer to the above-mentioned relevant content and the relevant content of the following method embodiment, which will not be described in detail in this application.

[0089] Alternatively, see Figure 3 , the communication antenna position determination device also includes a terminal, and the terminal is communicatively connected to the server.

[0090] The hardware structure of the terminal includes a processor, a memory and a display device, and the software structure includes a program product installed on the terminal.

[0091] The above-mentioned program product can be independent software, for example, an APP deployed on a terminal as a client (for example, a communication antenna position determination client); of course, the above-mentioned program product can also be a component of the terminal's operating system or a certain application, a mini program, etc. For example, it can be a mini program (Mini Program) in WeChat or an H5 (html5) web page, etc. It should be noted that a "mini program" is an application that can be used without downloading and installing.

[0092] The above-mentioned program product can call the hardware on the terminal (such as one or more of the display screen and communication modules, etc.) to implement the technical solution provided in this application.

[0093] Taking the program product as an application client deployed on a terminal as an example, when the application client is started, an application interface can be displayed on the terminal display screen, through which the parameters input by the user can be obtained, such as the intended position of the communication antenna, and the input parameters can be sent to the server by calling the communication module, or one or more messages sent by the server can be received and displayed on the terminal display screen.

[0094] The types of terminals include, but are not limited to, smart phones, tablet computers, televisions, laptop computers, desktop computers, etc., which are not specifically limited in the embodiments of the present application.

[0095] The server is installed with a communication antenna position determination application. The server is used to receive parameters sent by the terminal, and determine the position of the communication antenna using the communication antenna position determination application based on the received parameters. Furthermore, after the position of the communication antenna is determined, the server can also send the determined position of the communication antenna to the terminal, and the terminal can display it through a display so that the user can know the determined position of the communication antenna.

[0096] The server can be a single server, a server cluster consisting of multiple servers, or a cloud computing service center.

[0097] The terminal establishes a communication connection with the server through a wired or wireless network.

[0098] The communication antenna position determination device in the vehicle anti-electromagnetic interference test provided in the embodiment of the present application is provided with a networked communication test device and a signal power strength detector; for different intended positions of the communication antenna, the signal strength that may be received by the networked communication test device is detected by the signal power strength detector, and the communication status between the target vehicle and itself is tested by the networked communication test device; in order to find the position of the communication antenna that can make the signal power strength less than or equal to the rated power of the networked communication test device and ensure normal communication between the target vehicle and the networked communication test device; compared with the prior art, when conducting a vehicle anti-electromagnetic interference test, the position of the communication antenna is selected arbitrarily or directly selected based on one's own experience, resulting in the power intensity received by the networked communication test device being greater than its own rated power, thereby damaging the networked communication test device; the communication antenna position determination device in the vehicle anti-electromagnetic interference test provided in the present application determines the position of the communication antenna that can ensure normal communication without damaging the networked communication test device through the signal power strength detector and the networked communication test device, thereby improving the safety of the use of the networked communication test equipment and ensuring the smooth progress of the vehicle anti-electromagnetic interference test.

[0099] Figure 4 It is a flow chart of a method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test according to an embodiment of the present application. Figure 4 The method shown can be Figure 3 The server execution in Figure 4 As shown, the method includes the following steps 201-203:

[0100] Step 201: receiving at least one intended position for placing a communication antenna input by a user through a terminal display interface.

[0101] Among them, the vehicle anti-electromagnetic interference test is carried out in a semi-anechoic chamber. For the relevant introduction of the semi-anechoic chamber, please refer to the relevant content of the above-mentioned device, and this application will not describe it in detail here.

[0102] Among them, the intended position is a position that may become a position where the communication antenna is placed, that is, if the intended position meets certain requirements, it will become a confirmed position where the communication antenna can be placed.

[0103] Optionally, when the anti-interference antenna is located at a first predetermined distance to the southeast of the hub, the intended position includes: centered on the hub, at a second predetermined distance to the north (front) of the hub, at a third predetermined distance to the south (rear) of the hub, and at a fourth predetermined distance to the east (right) of the hub, and the hub is a device for placing a target vehicle.

[0104] The first predetermined distance is the distance between the phase center of the anti-interference antenna and the edge of the hub. The second predetermined distance, the third predetermined distance and the fourth predetermined distance are the distances between the center point of the intended position and the edge of the hub. The phase center of the anti-interference antenna is 1.2 meters from the ground; the center of the anti-interference antenna is horizontally aligned with the center of the hub.

[0105] Generally, in a semi-anechoic chamber, the positions of the hub and the anti-interference antenna are fixed and are not easily changed. Therefore, the intended position, the first predetermined distance, the second predetermined distance, the third predetermined distance, and the fourth predetermined distance can be determined based on experience.

[0106] The different positions of the communication antenna directly affect the strength of the anti-interference signal (electromagnetic signal sent by the anti-interference antenna) received by it, which in turn causes different signal strengths received by the spectrum analyzer. Figure 5 As shown, when the communication antennas are placed in different intended positions in the test room in turn, the spectrum analyzer is used to receive the signal power strength fed back by the communication antennas.

[0107] The present application receives and detects the attenuated anti-interference signal strength at different frequencies and different positions of the communication antenna through a spectrum analyzer, and sends the data to a server for storage, and determines the confirmed position in the intended position where the communication antenna can be placed based on this data.

[0108] Among them, the selection of anti-interference signal strength: Since the electromagnetic anti-interference strength specified in GB 34660-2017 is 30V / m, but the anti-interference strength of many OEMs' own corporate standards requires 70V / m or even higher. Therefore, in order to ensure that the position of the communication antenna determined by this method can be applied to more anti-interference signal strengths, when using this method to determine the position of the communication antenna, the strength of the anti-interference signal is selected to be 100V / m. If 100V / m is satisfied, it is applicable to field strengths less than 100V / m.

[0109] Among them, frequency selection: Although the upper frequency limit specified in GB 34660-2017 is 2GHz, many OEMs’ own corporate standards now require the upper frequency limit to be 6GHz. Therefore, in order to ensure that the communication antenna position determined by this method can be applied to more frequency conditions, when using this method to determine the position of the communication antenna, the frequency range is limited to 6GHz, which can cover the required test frequency band as much as possible.

[0110] In addition, the intended position is manually determined by the user based on the main lobe range of the anti-interference antenna, the first relationship, and the second relationship. The first relationship is the relationship between the electromagnetic signal frequency and the electromagnetic signal power intensity in the semi-anechoic chamber, and the second relationship is the relationship between the distance between the communication antenna and the anti-interference antenna and the electromagnetic signal power intensity.

[0111] See also Figure 6 Before step 201, the method for determining the position of the communication antenna in the vehicle anti-electromagnetic interference test further includes the following steps 204 to 208:

[0112] Step 204: determine the main lobe range of the anti-interference antenna.

[0113] Because the radiation intensity within the main lobe of the antenna is high, the location of the communication antenna needs to avoid the main lobe of the anti-interference antenna. In the process of determining the location of the communication antenna, the anti-interference antenna is placed in the position required by the standard during normal anti-electromagnetic interference testing.

[0114] Step 205: determining a first relationship between the electromagnetic signal frequency and the electromagnetic signal power intensity in the semi-anechoic chamber, wherein the electromagnetic signal power intensity is detected by an electromagnetic signal power intensity detector.

[0115] The first relationship includes that the electromagnetic signal power intensity increases, remains unchanged or decreases as the electromagnetic field frequency increases, which can be determined based on actual detection results.

[0116] In addition, the above first relationship can be determined for each electromagnetic field generating source of different strength, and a corresponding relationship between each electromagnetic field and the first relationship can be established and stored so that it can be directly obtained for subsequent use.

[0117] Refer to Table 2 below to record the attenuated anti-interference signal strength at different frequencies and communication antenna positions received by the spectrum analyzer. For intuitive viewing, process it into a line graph, such as Figure 7 As shown in the figure, the field strength is 100V / m, the communication antenna is located 5m to the right (east) of the hub, and the relationship between the signal strength received by the spectrum analyzer and the frequency. From the line graph, it can be seen that as the frequency increases, the signal strength received by the spectrum analyzer decreases. Therefore, the next step is to analyze the relationship between the received signal strength and other variables at a lower frequency.

[0118] Table 2

[0119]

[0120]

[0121]

[0122]

[0123] In this case, if the signal strength detected at the intended position is too great, the frequency of the electromagnetic field is increased.

[0124] Step 206: Determine a second relationship between the antenna distance between the communication antenna and the anti-interference antenna and the power intensity of the electromagnetic signal.

[0125] For example, when the anti-interference signal field strength is 30V / m and the signal strength received by the spectrum analyzer at 600MHz is related to the position of the communication antenna as follows: Figure 8 As shown, the anti-interference signal field strength is 50V / m, and at 600MHz, the relationship between the signal strength received by the spectrum analyzer and the position of the communication antenna is as follows Fig. 9 As shown, the anti-interference signal field strength is 30V / m. At 1.2GHz, the relationship between the signal strength received by the spectrum analyzer and the position of the communication antenna is as follows: Fig.10 shown.

[0126] pass Figure 8-Figure 10 It can be seen from the line graph that the received signal strength decreases with increasing distance. When the communication antenna is located 1 meter in front of the hub, the signal strength received by the spectrum analyzer is the largest. When the anti-interference signal field strength is 100V / m, the signal strength received by the spectrum analyzer is -38dBm. If the attenuation of 20dB is taken into account, the signal strength received by the spectrum analyzer under this path is -18dBm. The communication antenna is located 5 meters to the right of the hub, which is the position where the spectrum analyzer receives the smallest signal strength. If the communication connection can be made normally, this position is the best position for the communication antenna in the test room.

[0127] In this case, if the signal strength detected at the intended position is too large, the communication antenna is moved away from the anti-interference antenna to reduce the signal strength.

[0128] Step 207: store the main lobe range, the first relationship, and the second relationship.

[0129] Step 208: When receiving a request to obtain the main lobe range, the first relationship, and the second relationship, the main lobe range, the first relationship, and the second relationship are obtained and displayed.

[0130] When the user needs to determine the intended position, the user may refer to the above-mentioned main lobe range, the first relationship and the second relationship. For example, when the intended position is outside the main lobe range and the signal strength is high, the intended position is moved away from the hub; when the signal strength is high; when the communication between the communication antenna and the power detection device is in an abnormal state, the communication antenna is moved closer to the power detection device.

[0131] For example, see Figure 5 , the first predetermined distance is greater than or equal to 1.2 meters; the second distance is 1 meter, that is, point B; the third distance is 1 meter, that is, point A; the fourth distance includes multiple distances of 1 meter, 2 meters and 3 meters, respectively, points C, D and E, that is, points A, B, C, D and E are the intended positions of the communication antenna. The value of X can be determined according to actual conditions.

[0132] In addition, if the intended position determined this time cannot meet the next requirement, for example, when the next anti-electromagnetic interference test is conducted, it is found that other objects are placed where the communication antenna was placed last time, then a new confirmed position needs to be re-determined. At this time, it is necessary to re-acquire the main lobe range, the first relationship and the second relationship to determine the new intended position.

[0133] When the user needs to determine a new intended location again, the user can directly send a request to obtain the main lobe range, the first relationship, and the second relationship to the server. After receiving the request, the server obtains the main lobe range, the first relationship, and the second relationship stored in advance, and displays them. Thus, the user can determine the intended location according to the displayed main lobe range, the first relationship, and the second relationship.

[0134] In addition, the server can also automatically determine the intended location through other methods, which are not described in detail in this application.

[0135] Step 202: Based on a predetermined determination rule, a confirmed position where the communication antenna can be placed is determined from the intended positions and stored.

[0136] The confirming of the position is to confirm the position where the communication antenna can be placed.

[0137] Among them, the predetermined determination rule is: when the communication antenna is placed in the confirmed position, the power intensity of the electromagnetic signal received by the power detector is less than the rated power of the networked communication test equipment, and the communication antenna can communicate normally with the networked communication test equipment.

[0138] Alternatively, see Fig.11 , the step 202 is implemented by the following steps 2021 to 2024:

[0139] Step 2021: For each intended position, obtain the electromagnetic signal power strength detected by the signal power strength detector.

[0140] Step 2022: When the electromagnetic signal power intensity is greater than the rated power of the networked communication test equipment, determine that the current intended position is an unconfirmed position.

[0141] Step 2023, when the electromagnetic signal power intensity is less than the rated power of the networked communication test device, determining the communication state between the target vehicle and the networked communication test device;

[0142] Step 2024: When the communication state is normal, determine that the current intended position is a confirmed position where the communication antenna can be placed.

[0143] The communication status can be determined by the throughput rate, bit error rate, etc. of the networked communication test equipment. For example, when the throughput rate and the bit error rate are normal, the communication status is determined to be normal.

[0144] In addition, it is also possible to test whether the worst scenario (closest distance, maximum field strength, widest frequency range) can be determined as the confirmed position of the communication antenna. If the intended position in the worst scenario can be determined as the confirmed position, then any position in the semi-anechoic chamber can be determined as the confirmed position.

[0145] If there is no confirmed position where the communication antenna can be placed among all the intended positions, a new intended position is re-determined, and steps 201 and 202 are re-executed until the confirmed position is found directly from the intended positions.

[0146] The server stores the confirmed location so that it can be directly retrieved for subsequent use.

[0147] Step 203: when a communication antenna position acquisition request is received, the previously determined confirmed position of the communication antenna is acquired and displayed.

[0148] The communication antenna position acquisition request is input by the user through the display interface of the terminal.

[0149] When the confirmed position is displayed, the user can place the communication antenna according to the displayed confirmed position and then complete the anti-electromagnetic interference test.

[0150] In addition, for new users of the semi-anechoic chamber, there is no need to conduct multiple tests to determine the location of the communication antenna. Instead, the terminal can send a confirmation location acquisition request to the server to obtain the confirmed location. This not only reduces the number of tests, but also avoids the risk of damaging the equipment due to the test.

[0151] Fig.12 It is a structural diagram of an electronic device or computer system 500 shown in an embodiment of the present application. For example, the electronic device or computer system 500 can be the above-mentioned server, and the computer system includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage part to the random access memory (RAM) 503. In RAM503, various programs and data required for system operation are also stored. CPU501, ROM502 and RAM503 are connected to each other through a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0152] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed, so that a computer program read therefrom is installed into the storage section 508 as needed.

[0153] In particular, the processes described in the flowcharts of the embodiments of the present application can be implemented as computer software programs. For example, the method embodiments of the present application include a computer program product, which includes a computer program carried on a computer readable medium, and the computer program includes program code for executing the method shown in the flowchart.

[0154] As another aspect, the present application further provides a computer-readable medium, which may be included in the electronic device described in the above embodiment; or may exist independently without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements the method described in the embodiment of the present application.

[0155] It should be noted that the computer-readable medium shown in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two.

[0156] The units involved in the embodiments described in the present application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not constitute limitations on the units themselves in some cases. The units or modules described may also be set in a processor. The names of these units or modules do not constitute limitations on the units or modules themselves in some cases.

[0157] In addition, it should be noted that the scope of this application includes feasible technical solutions formed by specific combinations of the above-mentioned technical features, and should also cover other feasible technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned application concept.

[0158] Finally, it should be noted that all contents not described in the technical solution of this application can be implemented using existing technologies. In addition, the above embodiments are only used to illustrate the technical solution of this application, rather than to limit it; although the application is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A device for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test, characterized in that: include: Anti-interference antennas, networked communications test equipment, and signal power strength testers; The anti-interference antenna and the communication antenna are placed in a semi-anechoic chamber, the signal power strength detector and the networked communication test equipment are placed outside the semi-anechoic chamber, the communication antenna is connected to the signal power strength detector or the networked communication test equipment through a coaxial cable, and an electromagnetic field with a predetermined field strength is diffused in the semi-anechoic chamber when an anti-electromagnetic interference test is performed; The anti-interference antenna is used to receive an electromagnetic signal with a predetermined field strength in the semi-anechoic chamber, and transmit the electromagnetic signal into the semi-anechoic chamber, and the communication antenna can receive the electromagnetic signal transmitted by the anti-interference antenna; When the communication antenna is connected to the signal power strength detector, the communication antenna is used to receive the electromagnetic signal emitted by the anti-interference antenna and transmit the electromagnetic signal to the signal power strength detector through a coaxial cable; the signal power strength detector is used to receive the electromagnetic signal transmitted by the communication antenna and detect the power strength of the electromagnetic signal; When the communication antenna is connected to the networked communication test device, the communication antenna is used to transmit the communication signal of the target vehicle to the networked communication test device, so that the networked communication test device tests the communication status between itself and the target vehicle; The signal power strength detector and the networked communication test device determine whether at least one intended position is determined as a confirmed position where the communication antenna can be placed by the following method: For each of the intended positions, obtaining the electromagnetic signal power strength detected by the signal power strength detector; When the power intensity of the electromagnetic signal is greater than the rated power of the networked communication test device, determining that the current intended position is an unconfirmed position; When the electromagnetic signal power intensity is less than or equal to the rated power of the networked communication test device, determining the communication state between the target vehicle and the networked communication test device; When the communication state is a normal state, the current intended position is determined to be a confirmed position where the communication antenna can be placed.

2. The communication antenna position determination device according to claim 1, characterized in that: A signal power attenuator is connected between the communication antenna and the signal power strength detector, and the signal power attenuator is placed outside the semi-anechoic chamber.

3. The communication antenna position determination device according to claim 2, characterized in that: The signal power strength detector is a spectrum analyzer, and the networked communication test equipment is a cellular communication equipment, a V2X communication equipment or a navigation communication equipment.

4. The communication antenna position determination device according to any one of claims 1 to 3, characterized in that: The determining device further includes a server, wherein the server is provided with a memory and one or more processors; The memory is used to store one or more instructions; The one or more processors are configured to execute the one or more instructions; When the one or more instructions are executed by the one or more processors, the one or more processors implement a predetermined method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test.

5. The communication antenna position determination device according to claim 4, characterized in that: The server stores a computer program, and when the computer program is executed by the processor, a method for determining the position of a communication antenna in a predetermined vehicle anti-electromagnetic interference test is implemented.

6. A method for determining the position of a communication antenna in a vehicle anti-electromagnetic interference test, characterized in that: The communication antenna position determination device used in the vehicle anti-electromagnetic interference test according to any one of claims 1 to 5 above comprises: Receiving at least one intended position for placing a communication antenna input by a user through a terminal display interface; Based on a predetermined determination rule, determining a confirmed position where the communication antenna can be placed from the intended positions, and storing the position; When a communication antenna position acquisition request is received, the previously determined confirmed position of the communication antenna is acquired and displayed.

7. The method for determining the position of a communication antenna according to claim 6, characterized in that: When the anti-interference antenna is located at the first predetermined distance in the southeast direction of the hub, the intended position includes: centered on the hub, at the second predetermined distance north of the hub, at the third predetermined distance south of the hub, and at the fourth predetermined distance east of the hub, and the hub is a device for placing the target vehicle.

8. The method for determining the position of a communication antenna according to claim 6, characterized in that: Before receiving at least one intended position for placing a communication antenna input by a user through a terminal display interface, the method further includes: Determine the main lobe range of the anti-interference antenna; Determine a first relationship between the electromagnetic signal frequency and the electromagnetic signal power intensity in the semi-anechoic chamber, wherein the electromagnetic signal power intensity is detected by an electromagnetic signal power intensity detector; Determine a second relationship between the antenna distance between the communication antenna and the anti-interference antenna and the power intensity of the electromagnetic signal; storing the main lobe range, the first relationship, and the second relationship; When an acquisition request for acquiring the main lobe range, the first relationship, and the second relationship is received, the main lobe range, the first relationship, and the second relationship are acquired and displayed.

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