Vehicle-mounted device

Abstract

The invention discloses a vehicle-mounted device. The vehicle-mounted device comprises an acquisition device used for acquiring target data; the host equipment is used for processing the target data; the combined coaxial cable is connected between the acquisition equipment and the host equipment and is used for transmitting the target data; wherein the combined coaxial cable is obtained by m coaxial cables which are determined based on a preset test rule and are subjected to (m-1) times of switching, so that the vehicle-mounted equipment meets a vehicle-mounted electrostatic test requirement. The high-speed signal performance of the whole vehicle is improved, and the wiring cost of the real vehicle is reduced.

Description

Technical Field

[0001] The disclosed embodiments of the present application relate to the automotive field, and more specifically, to a vehicle-mounted device. Background Art

[0002] In vehicle design, factors such as the length of different wires and cables, the number of transfers, and connectors will affect the quality of signal transmission. However, when wiring a real vehicle, untested designs are usually directly wired and formed for inspection. If the inspection results are unsatisfactory, the cost of modification and adjustment will be extremely high. Summary of the invention

[0003] According to an embodiment of the present application, the present application proposes a vehicle-mounted device to improve the high-speed signal performance of the entire vehicle and reduce the actual vehicle wiring cost.

[0004] The first aspect of the present application discloses a vehicle-mounted device, comprising: a collection device, for collecting target data; a host device, for processing the target data; a combined coaxial cable, the combined coaxial cable is connected between the collection device and the host device, and is used to transmit the target data; wherein the combined coaxial cable is obtained by m coaxial cables being transferred m-1 times based on preset test rules, so that the vehicle-mounted device meets the vehicle-mounted electrostatic testing requirements.

[0005] In some embodiments, the preset test rules include: obtaining at least one preset combination coaxial cable, each of the preset combination coaxial cables is obtained by connecting n coaxial cables n-1 times, wherein the sum of the cable lengths of the n coaxial cables connected n-1 times is a preset value, and the lengths of the n coaxial cables are the same, partially the same, or different, and n≥1; performing an electrostatic test using the at least one preset combination coaxial cable to obtain at least one test result; and selecting the combination coaxial cable from the at least one preset combination coaxial cable based on the at least one test result.

[0006] In some embodiments, the preset value includes a first preset value and a second preset value, the second preset value is less than the first preset value; the at least one preset combination coaxial cable includes at least: a first combination coaxial cable, the sum of the cable lengths of n coaxial cables after n-1 transfers is the first preset value; a second combination coaxial cable, the sum of the cable lengths of n coaxial cables after n-1 transfers is the second preset value; a third combination coaxial cable, the sum of the cable lengths of n-1 coaxial cables after n-2 transfers is the first preset value.

[0007] In some embodiments, the electrostatic test performed using the at least one preset combination of coaxial cables includes: performing the electrostatic test on the first combination of coaxial cables; determining whether the electrostatic test result of the first combination of coaxial cables meets the vehicle-mounted electrostatic test requirements; in response to the electrostatic test result of the first combination of coaxial cables not meeting the vehicle-mounted electrostatic test requirements, determining whether the first preset value is the minimum value of the sum of the cable lengths of the n coaxial cables.

[0008] In some embodiments, the electrostatic test performed using the at least one preset combination of coaxial cables further includes: in response to the first preset value not being the minimum value of the sum of the cable lengths of the n coaxial cables, performing the electrostatic test on the second combination of coaxial cables; in response to the first preset value being the minimum value of the sum of the cable lengths of the n coaxial cables, performing the electrostatic test on the third combination of coaxial cables.

[0009] In some embodiments, the electrostatic test using the at least one preset combination of coaxial cables further includes: in response to the electrostatic test result of the first combination of coaxial cables meeting the vehicle-mounted electrostatic test requirement, determining whether the fourth combination of coaxial cables exists; in response to the existence of the fourth combination of coaxial cables, performing the electrostatic test on the fourth combination of coaxial cables; in response to the absence of the fourth combination of coaxial cables, determining whether the electrostatic test of the at least one preset combination of coaxial cables is completed; wherein the fourth combination of coaxial cables is N coaxial cables that have been transferred n-1 times and the sum of the cable lengths is the first preset value, the lengths of the N coaxial cables are partially different from those of the n coaxial cables, and N=n.

[0010] In some embodiments, the electrostatic test performed using the at least one preset combination coaxial cable further includes: in response to the electrostatic test of the at least one preset combination coaxial cable not being completed, performing the electrostatic test on the remaining preset combination coaxial cables in the at least one preset combination coaxial cable; in response to the completion of the electrostatic test of the at least one preset combination coaxial cable, performing a cable high-frequency parameter test on the at least one preset combination coaxial cable to obtain corresponding radio frequency parameters.

[0011] In some embodiments, the radio frequency parameters include at least one of a scattering parameter, a voltage standing wave ratio, and a time domain reflectometry parameter.

[0012] In some embodiments, the n coaxial cables in the at least one preset combination of coaxial cables are connected in a U-shape and / or an S-shape.

[0013] In some embodiments, the combined coaxial cable includes a serializer, a deserializer, and a transmission link for transmitting the target data.

[0014] The beneficial effects of the present application are as follows: the vehicle-mounted equipment includes an acquisition device, a host device and a combined coaxial cable, and the acquisition device and the host device are connected by the combined coaxial cable to achieve transmission of target data, wherein the combined coaxial cable determined based on preset test rules is used for connection, which can improve the high-speed signal performance of the entire vehicle and reduce the actual vehicle wiring cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application will be further described below in conjunction with the accompanying drawings and implementation methods, in which:

[0016] Figure 1 is a schematic structural diagram of a vehicle-mounted device according to an embodiment of the present application;

[0017] Figure 2 is a partial schematic diagram of a preset combined coaxial cable according to an embodiment of the present application;

[0018] Figure 3 This is a schematic diagram of the electrostatic test process of an embodiment of the present application.

[0019] Figure 4 is a schematic diagram of an electrostatic discharge-discharge island test bench according to an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of a cable high-frequency parameter test bench according to an embodiment of the present application;

[0021] Figure 6 It is a schematic diagram of the structure of the combined coaxial cable in an embodiment of the present application. DETAILED DESCRIPTION

[0022] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, and can mean including any one or more elements selected from the set consisting of A, B, and C. In addition, the terms "first", "second", and "third" in this application are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

[0024] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] See also Figure 1 , Figure 1 The vehicle-mounted device 10 includes a collection device 110 , a host device 120 and a combined coaxial cable 130 .

[0026] The acquisition device 110 is used to acquire target data, for example, the acquisition device 110 is a SerDes (Serializer / Deserializer) camera device, and the target data may be audio and video data. The host device 120 may be a SerDes host device, which is used to receive and process the audio and video data acquired by the acquisition device 110.

[0027] The combined coaxial cable 130 is connected between the acquisition device 110 and the host device 120, and is used to transmit the audio and video data collected by the acquisition device 110 to the host device 120 for processing. The combined coaxial cable 130 is obtained by m coaxial cables being transferred m-1 times based on a preset test rule, so that the vehicle-mounted device 10 meets the vehicle-mounted electrostatic test requirements.

[0028] For example, the combined coaxial cable 130 can be a combination A of five coaxial SerDes cables that have undergone four transfers. Since the combination A is determined based on preset test rules, the acquisition device 110 and the host device 120 connected by the combination A can pass the whole vehicle electrostatic test, that is, they can work normally in an electrostatic discharge (ESD) environment.

[0029] In this embodiment, the vehicle-mounted device 10 includes a collection device 110, a host device 120 and a combined coaxial cable 130. The combined coaxial cable 130 is used to connect the collection device 110 and the host device 120 to transmit target data. The combined coaxial cable 130 determined based on preset test rules is used for connection, which can improve the high-speed signal performance of the entire vehicle and reduce the actual vehicle wiring cost.

[0030] In some embodiments, the preset test rules include: obtaining at least one preset combined coaxial cable, each preset combined coaxial cable is obtained by connecting n coaxial cables n-1 times; performing an electrostatic test using at least one preset combined coaxial cable to obtain at least one test result; and selecting a combined coaxial cable from at least one preset combined coaxial cable based on at least one test result.

[0031] The sum of the cable lengths of the n coaxial cables that have been transferred n-1 times is a preset value, the lengths of the n coaxial cables are the same, partially the same, or different, and n represents a variable. That is, at least one preset combined coaxial cable is composed of multiple coaxial SerDes cables, the lengths of the coaxial cables are the same, partially the same, or different, the models of the coaxial SerDes cables can be the same or different, and the cable lengths include 1 meter, 2 meters, 3 meters, 4 meters, 5 meters, 10 meters, 15 meters, etc. For example, the preset combination coaxial cable of 5 coaxial cables that have been transferred 4 times and the total cable length is 10 meters can be various combinations such as 5+2+1+1+1, 4+3+1+1+1, 4+2+2+1+1, 3+3+2+1+1, 3+2+2+2+1, 2+2+2+2+2; the preset combination coaxial cable of 4 coaxial cables that have been transferred 3 times and the total cable length is 10 meters can be various combinations such as 5+2+2+1, 4+3+3+1, 4+4+1+1, 3+3+3+1, 3+3+2+2, 4+2+2+2, etc.

[0032] Obtain at least one preset combined coaxial cable, each preset combined coaxial cable is obtained by connecting n coaxial cables n-1 times, such as Figure 2 As shown, Figure 2 It is a partial schematic diagram of a preset combined coaxial cable of an embodiment of the present application. Furthermore, at least one preset combined coaxial cable is used to perform an electrostatic test to obtain at least one test result. For example, at least one preset combined coaxial cable is used to connect the acquisition device 110 and the host device 120, and is exposed to a 25kv electrostatic discharge environment to test whether the device connected to the preset combined coaxial cable can work normally. That is, through at least one test result, it is determined whether the corresponding preset combined coaxial cable can pass the vehicle electrostatic test, and the preset combined coaxial cable that passes the electrostatic test can be used as an optional combined coaxial cable 130.

[0033] In some embodiments, the preset value includes a first preset value and a second preset value, the second preset value is less than the first preset value; at least one preset combination coaxial cable includes at least: a first combination coaxial cable, the sum of the cable lengths of n coaxial cables after n-1 transfers is a first preset value; a second combination coaxial cable, the sum of the cable lengths of n coaxial cables after n-1 transfers is a second preset value; a third combination coaxial cable, the sum of the cable lengths of n-1 coaxial cables after n-2 transfers is the first preset value.

[0034] The sum of the cable lengths of the n coaxial cables that have been transferred n-1 times includes a first preset value and a second preset value, and the second preset value is less than the first preset value, for example, the second preset value is 1 meter less than the first preset value. If n=5, then at least one preset combination coaxial cable includes at least a first combination coaxial cable, a second combination coaxial cable, and a third combination coaxial cable, wherein the first combination coaxial cable may be 5 coaxial cables that have been transferred 4 times and have a total cable length of 10 meters, the second combination coaxial cable may be 5 coaxial cables that have been transferred 4 times and have a total cable length of 9 meters, and the third combination coaxial cable may be 4 coaxial cables that have been transferred 3 times and have a total cable length of 10 meters.

[0035] In some embodiments, an electrostatic test is performed using at least one preset combination of coaxial cables, including: performing an electrostatic test on a first combination of coaxial cables; determining whether the electrostatic test result of the first combination of coaxial cables meets the on-vehicle electrostatic test requirements; in response to the electrostatic test result of the first combination of coaxial cables not meeting the on-vehicle electrostatic test requirements, determining whether a first preset value is the minimum value of the sum of the cable lengths of n coaxial cables.

[0036] For example, the first combined coaxial cable A1 is 2+2+2+2+2, the second combined coaxial cable B1 is 1+2+2+2+2, and the third combined coaxial cable C1 is 3+3+2+2. Perform an electrostatic test on the first combined coaxial cable A1, for example, perform a ±25kV test on the first combined coaxial cable A1 using an ESD discharge island. Determine whether the electrostatic test result of the first combined coaxial cable A1 meets the vehicle-mounted electrostatic test requirements, that is, test whether the device connected to the first combined coaxial cable A1 can work normally in an electrostatic discharge environment of ±25kv. If the electrostatic test result of the first combined coaxial cable A1 does not meet the vehicle-mounted electrostatic test requirements, determine whether the cable length of the first combined coaxial cable A1 is the minimum value of the sum of the cable lengths of the five coaxial cables, for example, the minimum value of the sum of the cable lengths of the five coaxial cables can be 5 meters (1+1+1+1+1).

[0037] Further, in some embodiments, in response to the first preset value not being the minimum value of the sum of the cable lengths of the n coaxial cables, an electrostatic test is performed on the second combined coaxial cable.

[0038] For example, if the sum of the cable lengths of the first combined coaxial cable A1 (10 meters) is not the minimum value of the sum of the cable lengths of the five coaxial cables (5 meters), then an electrostatic test is performed on the second combined coaxial cable B1, that is, a preset combined coaxial cable with the same number of transfers and a sum of cable lengths reduced by one is used to test whether the equipment connected to the second combined coaxial cable B1 can work normally in an electrostatic discharge environment of ±25kv. Similarly, it is determined whether the electrostatic test result of the second combined coaxial cable B1 meets the vehicle-mounted electrostatic test requirements. In response to the electrostatic test result of the second combined coaxial cable B1 not meeting the vehicle-mounted electrostatic test requirements, it is determined whether the sum of the cable lengths of the second combined coaxial cable B1 (9 meters) is the minimum value of the sum of the cable lengths of the five coaxial cables (5m).

[0039] In some embodiments, in response to the first preset value being the minimum value of the sum of the cable lengths of the n coaxial cables, an electrostatic test is performed on the third set of coaxial cables.

[0040] For example, the first combination coaxial cable A2 is 1+1+1+1+1, the second combination coaxial cable B2 is 1+1+2+2+3, and the third combination coaxial cable C2 is 1+1+1+2. Perform an electrostatic test on the first combination coaxial cable A2 to determine whether the electrostatic test result of the first combination coaxial cable A2 meets the vehicle-mounted electrostatic test requirements, that is, whether the equipment connected to the first combination coaxial cable A2 can work normally in the electrostatic discharge environment of ±25kv. If the electrostatic test result of the first combination coaxial cable A2 does not meet the vehicle-mounted electrostatic test requirements, determine whether the cable length of the first combination coaxial cable A2 is the minimum value (5 meters) of the sum of the cable lengths of the five coaxial cables. In response to the fact that the sum of the cable lengths of the first combination coaxial cable A2 is 5 meters, perform an electrostatic test on the third combination coaxial cable C2, that is, a preset combination coaxial cable with one fewer transfer times and an unchanged sum of cable lengths. Similarly, determine whether the electrostatic test result of the third combined coaxial cable C2 meets the vehicle-mounted electrostatic test requirements. In response to the electrostatic test result of the third combined coaxial cable C2 not meeting the vehicle-mounted electrostatic test requirements, and the cable length of the third combined coaxial cable C2 (5 meters) is not the minimum value of the sum of the cable lengths of the four coaxial cables (4m), further, an electrostatic test can be performed on the four combined coaxial cables with three transfer times and a total cable length of 4m.

[0041] Further, in some embodiments, in response to the electrostatic test result of the first combination of coaxial cables meeting the vehicle-mounted electrostatic test requirements, it is determined whether there is a fourth combination of coaxial cables; in response to the existence of the fourth combination of coaxial cables, an electrostatic test is performed on the fourth combination of coaxial cables; in response to the absence of the fourth combination of coaxial cables, it is determined whether the electrostatic test of at least one preset combination of coaxial cables is completed; wherein, the fourth combination of coaxial cables is N coaxial cables that have been transferred n-1 times and the sum of the cable lengths is a first preset value, the lengths of the N coaxial cables are partially different from those of the n coaxial cables, and N=n.

[0042] Taking the above-mentioned first combination coaxial cable A1 as an example, the first combination coaxial cable A1 is 2+2+2+2+2. In response to the electrostatic test result of the first combination coaxial cable A1 meeting the vehicle-mounted electrostatic test requirements, it is determined whether there is a fourth combination coaxial cable, that is, in an electrostatic discharge environment of ±25kv, the device connected to the first combination coaxial cable A1 can work normally, and then it is determined whether there is a fourth combination coaxial cable. The fourth combination coaxial cable is N coaxial cables that have been transferred n-1 times and the sum of the cable lengths is a first preset value. The lengths of the N coaxial cables are partially different from those of the n coaxial cables and N=n, that is, other line length combinations of 5 coaxial cables that have been transferred 4 times and the sum of the cable lengths is 10 meters. For example, the fourth combination coaxial cable D1 can be 1+3+2+2+2, 1+1+3+3+2, etc. At this time, in response to the existence of the fourth combination coaxial cable D1, the fourth combination coaxial cable D1 is subjected to an electrostatic test.

[0043] Or, taking the above-mentioned first combination coaxial cable A2 as an example, the first combination coaxial cable A2 is 1+1+1+1+1. In response to the electrostatic test result of the first combination coaxial cable A2 meeting the vehicle-mounted electrostatic test requirements, it is determined whether there is a fourth combination coaxial cable, that is, in an electrostatic discharge environment of ±25kv, the device connected to the first combination coaxial cable A2 can work normally, and then it is determined whether there is a fourth combination coaxial cable. The fourth combination coaxial cable is N coaxial cables that have been transferred n-1 times and the sum of the cable lengths is a first preset value. The lengths of the N coaxial cables are partially different from the lengths of the n coaxial cables and N=n, that is, other line length combinations of 5 coaxial cables that have been transferred 4 times and the sum of the cable lengths is 5 meters. Accordingly, it is determined that there is no fourth combination coaxial cable. At this time, in response to the absence of the fourth combination coaxial cable, it is determined whether the electrostatic test of at least one preset combination coaxial cable is completed, for example, whether the electrostatic test of the remaining preset combination coaxial cables such as the second combination coaxial cable B2 and the third combination coaxial cable C2 is completed.

[0044] In some embodiments, performing an electrostatic test using at least one preset combination coaxial cable further includes: in response to incomplete electrostatic test of at least one preset combination coaxial cable, performing an electrostatic test on the remaining preset combination coaxial cables in the at least one preset combination coaxial cable; in response to completing the electrostatic test of at least one preset combination coaxial cable, performing a cable high-frequency parameter test on the at least one preset combination coaxial cable to obtain corresponding radio frequency parameters.

[0045] In response to the absence of the fourth combination coaxial cable, it is determined whether the electrostatic test of at least one preset combination coaxial cable is completed, that is, whether the electrostatic test of all preset combination coaxial cables is completed. If it is determined that there are still preset combination coaxial cables that have not been electrostatically tested, continue to perform electrostatic testing on the untested preset coaxial cables according to the preset test trajectory.

[0046] Alternatively, if it is determined that the electrostatic test of at least one preset combination coaxial cable has been completed, a cable high-frequency parameter test is performed on at least one preset combination coaxial cable to obtain corresponding RF parameters. For example, a cable high-frequency parameter test is performed on the preset combination coaxial cable that meets the vehicle-mounted electrostatic test requirements, thereby quantifying the RF parameter information of the preset combination coaxial cable that meets the vehicle-mounted electrostatic test requirements.

[0047] In some embodiments, the RF parameter includes at least one of a scattering parameter (S parameter), a voltage standing wave ratio (VSWR), and a time domain reflectometry parameter (TDR parameter).

[0048] For ease of understanding, the process of determining the combined coaxial cable based on the preset test rules in the embodiment of the present application is described by way of example. Figure 3 As shown, Figure 3 4 is a flow chart of an electrostatic test according to an embodiment of the present application.

[0049] S31: Obtain a first combined cable, that is, obtain a first combined coaxial cable whose sum of cable lengths of n coaxial cables after n-1 times of switching is a first preset value, for example, 5 coaxial cables after 4 times of switching and whose sum of cable lengths is 10 meters.

[0050] S32: Determine whether the electrostatic test result meets the vehicle-mounted electrostatic test requirements.

[0051] One of the judgment results of step S32: in response to the electrostatic test result of the first combination cable not meeting the vehicle-mounted electrostatic test requirement, executing step S33.

[0052] The second judgment result of step S32: in response to the electrostatic test result of the first combination cable meeting the vehicle-mounted electrostatic test requirement, executing step S36.

[0053] S33: Determine whether the sum of the cable lengths is the minimum value of the current combined coaxial cable. In response to the electrostatic test result of the first combined cable not meeting the vehicle-mounted electrostatic test requirement, record the corresponding bottom voltage threshold, and determine whether the sum of the cable lengths of the first combined cable is the minimum value of the combined coaxial cable corresponding to the current number of transfers, for example, the minimum sum of the cable lengths of 5 coaxial cables after 4 transfers is 5 meters.

[0054] One of the judgment results of step S33: in response to the sum of the cable lengths of the first combination of cables not being the minimum value of the current combination of coaxial cables, executing step S34.

[0055] The second judgment result of step S33: in response to the sum of the cable lengths of the first combination of cables being the minimum value of the current combination of coaxial cables, executing step S35.

[0056] S34: Obtain a second combined cable. Obtain a second combined cable for electrostatic testing, that is, obtain a second combined coaxial cable whose sum of cable lengths of n coaxial cables after n-1 transfers is a second preset value, for example, five coaxial cables after four transfers and whose sum of cable lengths is 9 meters. It can be understood that in response to the sum of cable lengths of the first combined cable not being the minimum value of the combined coaxial cables corresponding to the current number of transfers, an electrostatic test is performed on the combined coaxial cable whose number of transfers remains unchanged and whose cable length is reduced by 1 meter.

[0057] S35: Obtain a third combined cable. Obtain the third combined cable for electrostatic testing, that is, obtain a third combined coaxial cable whose sum of cable lengths of n-1 coaxial cables after n-2 transfers is a first preset value, for example, four coaxial cables after three transfers and whose sum of cable lengths is 10 meters. It can be understood that in response to the sum of the cable lengths of the first combined cables being the minimum value of the combined coaxial cables corresponding to the current number of transfers, an electrostatic test is performed on the combined coaxial cable whose number of transfers is reduced by one and whose cable length remains unchanged.

[0058] S36: Determine whether there is a fourth combination of coaxial cables. The fourth combination of coaxial cables is N coaxial cables that have been switched n-1 times and the sum of the cable lengths is a first preset value, the lengths of the N coaxial cables are partially different from the lengths of the n coaxial cables, and N=n.

[0059] One of the judgment results of step S36: in response to the existence of the fourth combination cable, executing step S37.

[0060] The second judgment result of step S36: in response to the fourth combination cable not existing, executing step S38.

[0061] S37: Acquire a fourth combined cable. In response to the existence of the fourth combined cable, acquire the fourth combined cable to perform an electrostatic test.

[0062] S38: Determine whether the electrostatic test of all preset combined coaxial cables is completed.

[0063] One of the judgment results of step S38: in response to the electrostatic test of all the preset combination coaxial cables not being completed, executing step S39.

[0064] The second judgment result of step S38: in response to completing the electrostatic test of all preset combinations of coaxial cables, executing step S40.

[0065] S39: Obtain other preset combined coaxial cables. Obtain other preset combined coaxial cables for electrostatic testing, for example, obtain a combined coaxial cable with a transfer number plus / minus one and a constant cable length for electrostatic testing, or obtain a combined coaxial cable with a constant transfer number and a cable length plus / minus one for electrostatic testing.

[0066] S40: Perform a cable high-frequency parameter test. For example, perform a cable high-frequency parameter test on a preset combined coaxial cable that meets the vehicle-mounted electrostatic test requirements to obtain corresponding radio frequency parameters.

[0067] In some embodiments, the n coaxial cables in the preset combined coaxial cable are connected in a U-shape and / or an S-shape.

[0068] When at least one preset combined coaxial cable is used for electrostatic testing, the n coaxial cables in the at least one preset combined coaxial cable are connected in an S-shaped manner. For example, when n=4, the preset combined coaxial cable is 4 coaxial cables that have been switched three times. Figure 4 As shown, Figure 4It is a schematic diagram of an electrostatic discharge-discharge island test bench of an embodiment of the present application. The SerDes host is placed at the position of the device under test (DUT) of the electrostatic test, the SerDes camera is placed at the auxiliary device position of the metal horizontal coupling plate, and the display screen is placed at the insulating bench position. The camera generates a high-speed SerDes signal, which is transmitted to the SerDes host through 4 sections of the coaxial SerDes adapter cable under test, and the SerDes host decodes and transmits the video signal to the display screen for display. When testing, the coaxial SerDes cable is placed in accordance with the principle of S-shaped / snake line. In addition, it is ensured that the first section or multiple sections of the line closest to the SerDes host should be placed on the discharge island, and the remaining lines are placed on the horizontal coupling board to ensure that the display cable is as short as possible and meets the electrostatic requirements, so as to avoid the abnormal display screen affecting the test results. During the test process, it can be judged whether the electrostatic test results of the corresponding combined coaxial cable meet the vehicle-mounted electrostatic test requirements based on whether the display of the display screen is normal. For example, if water ripples, flashing screen, etc. appear on the display screen, it is judged that the electrostatic test results do not meet the vehicle-mounted electrostatic test requirements.

[0069] When performing a cable high-frequency parameter test on at least one preset combined coaxial cable, the n coaxial cables in the at least one preset combined coaxial cable are connected in a U shape. Figure 5 As shown, Figure 5 This is a schematic diagram of a cable high-frequency parameter test bench according to an embodiment of the present application. The preset combined coaxial cable to be tested is connected to the two ports of the network analyzer to test the S parameters, VSWR, and TDR parameters. The coaxial SerDes cable is placed in a U-shape to avoid multiple bends.

[0070] In some embodiments, Figure 6 As shown, Figure 6 It is a structural diagram of a combined coaxial cable in an embodiment of the present application. The combined coaxial cable 130 includes a serializer (Serializer) 131, a deserializer (Deserializer) 132 and a transmission link 133. The transmission link 133 connects the serializer (Serializer) 131 and the deserializer (Deserializer) 132 to realize the transmission of target data.

[0071] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0072] In the several embodiments provided in the present application, it should be understood that the disclosed methods and related devices can be implemented in other ways. For example, the above-described related device implementations are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication disconnection shown or discussed can be through some interfaces, indirect coupling or communication disconnection of devices or units, which can be electrical, mechanical or other forms.

[0073] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0074] It is easy for a person skilled in the art to know that many modifications and changes can be made to the device and method while maintaining the teaching content of the present application. Therefore, the above disclosure should be considered as limited only by the scope of the appended claims.

Claims

1. A vehicle-mounted device, characterized in that: include: A collection device for collecting target data; A host device, configured to process the target data; A combined coaxial cable, the combined coaxial cable is connected between the acquisition device and the host device, and is used to transmit the target data; The combined coaxial cable is obtained by switching m coaxial cables m-1 times based on preset test rules, so that the vehicle-mounted device meets the vehicle-mounted electrostatic test requirements.

2. The vehicle-mounted device according to claim 1, characterized in that: The preset test rules include: Obtain at least one preset combined coaxial cable, each of the preset combined coaxial cables being obtained by connecting n coaxial cables n-1 times, wherein the sum of the cable lengths of the n coaxial cables connected n-1 times is a preset value, and the lengths of the n coaxial cables are the same, partially the same, or different, and n≥1; Performing an electrostatic test using the at least one preset combined coaxial cable to obtain at least one test result; The combined coaxial cable is selected from the at least one preset combined coaxial cable based on the at least one test result.

3. The vehicle-mounted device according to claim 2, characterized in that: The preset value includes a first preset value and a second preset value, and the second preset value is smaller than the first preset value; The at least one preset combined coaxial cable comprises at least: A first combined coaxial cable having a sum of cable lengths of n coaxial cables that have been switched n-1 times equal to the first preset value; A second combined coaxial cable having a sum of cable lengths of n coaxial cables that have been switched n-1 times being equal to the second preset value; A third combined coaxial cable having a sum of cable lengths of n-1 coaxial cables that have been switched n-2 times equal to the first preset value.

4. The vehicle-mounted device according to claim 3, characterized in that: The method of performing an electrostatic test using the at least one preset combined coaxial cable comprises: Performing the electrostatic test on the first combined coaxial cable; Determining whether the electrostatic test result of the first combined coaxial cable meets the vehicle-mounted electrostatic test requirement; In response to the electrostatic test result of the first combined coaxial cable not meeting the vehicle-mounted electrostatic test requirement, it is determined whether the first preset value is a minimum value of the sum of the cable lengths of the n coaxial cables.

5. The vehicle-mounted device according to claim 4, characterized in that: The electrostatic test using the at least one preset combined coaxial cable further comprises: In response to the first preset value not being the minimum value of the sum of the cable lengths of the n coaxial cables, performing the electrostatic test on the second combined coaxial cable; In response to the first preset value being the minimum value of the sum of the cable lengths of the n coaxial cables, the electrostatic test is performed on the third combined coaxial cable.

6. The vehicle-mounted device according to claim 4, characterized in that: The electrostatic test using the at least one preset combined coaxial cable further comprises: In response to the electrostatic test result of the first combination of coaxial cables meeting the vehicle-mounted electrostatic test requirement, determining whether there is a fourth combination of coaxial cables; In response to the presence of the fourth combined coaxial cable, performing the electrostatic test on the fourth combined coaxial cable; In response to the fourth combined coaxial cable not existing, determining whether the electrostatic test of the at least one preset combined coaxial cable is completed; The fourth combination of coaxial cables is N coaxial cables that have been switched n-1 times and the sum of the cable lengths is the first preset value. The lengths of the N coaxial cables are partially different from those of the n coaxial cables, and N=n.

7. The vehicle-mounted device according to claim 6, characterized in that: The electrostatic test using the at least one preset combined coaxial cable further comprises: In response to the electrostatic test of the at least one preset combined coaxial cable not being completed, performing the electrostatic test on the remaining preset combined coaxial cables of the at least one preset combined coaxial cable; In response to completing the electrostatic test of the at least one preset combined coaxial cable, a cable high-frequency parameter test is performed on the at least one preset combined coaxial cable to obtain corresponding radio frequency parameters.

8. The vehicle-mounted device according to claim 7, characterized in that: The radio frequency parameters include at least one of a scattering parameter, a voltage standing wave ratio, and a time domain reflectometer parameter.

9. The vehicle-mounted device according to claim 2, characterized in that: The n coaxial cables in the at least one preset combined coaxial cable are connected in a U-shape and / or an S-shape.

10. The vehicle-mounted device according to claim 1, characterized in that: The combined coaxial cable includes a serializer, a deserializer and a transmission link, which are used to transmit the target data.

Images