Automobile digital key radio frequency performance detection equipment and detection method

Abstract

The invention belongs to the technical field of automobile electronics, and provides an automobile digital key radio frequency performance detection device and method, and the device comprises a shielding box module, a UWB test module, a BLE test module, and a control module. The shielding box module is used for accommodating at least two to-be-tested devices; the control module is used for controlling the to-be-tested equipment to enter a working mode so as to enable the to-be-tested equipment to obtain a radio frequency signal sent by at least one of the UWB test module and the BLE test module, and is used for obtaining a feedback signal of the to-be-tested equipment for the sent radio frequency signal; and obtaining a radio frequency performance detection result of the to-be-tested equipment according to the feedback signal. The device and the method have the advantages that the control module obtains the feedback signal of the to-be-detected device for the sent radio frequency signal, detection of the to-be-detected device for the UWB radio frequency performance and the BLE radio frequency performance is achieved, and therefore the detection efficiency and the detection accuracy of the radio frequency performance of the to-be-detected device can be improved.

Description

Technical Field

[0001] The present invention relates to the field of automotive electronic technology, and in particular to a radio frequency performance detection device and a detection method for an automotive digital key. Background Art

[0002] Driven by the development of automobiles and user needs, car keys have begun to develop from traditional mechanical keys to digital and intelligent ones. Currently, common digital keys integrate technologies such as UWB and BLE to achieve communication between mobile devices and the car, which can help users conveniently control vehicle functions. With the widespread application of digital keys, the demand for related RF performance testing has also increased further. Summary of the invention

[0003] The object of the present invention is to provide a UWB and BLE automobile digital key radio frequency performance detection device and method to solve the above problems.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A radio frequency performance testing device for a digital key for an automobile, comprising: a shielding box module, a UWB test module, a BLE test module, and a control module respectively connected to the shielding box module, the UWB test module, and the BLE test module;

[0006] The shielding box module includes a shielding box body, which is used to accommodate at least two devices to be tested and shield the devices to be tested from interference by external radio frequency signals;

[0007] The control module is used to control the device to be tested to enter the working mode so that the device to be tested obtains the radio frequency signal sent by at least one of the UWB test module and the BLE test module, and is used to obtain the feedback signal of the device to be tested for the sent radio frequency signal;

[0008] And according to the feedback signal, the radio frequency performance test result of the device to be tested is obtained.

[0009] Furthermore, the shielding box module also includes a UWB coupling antenna and a BLE coupling antenna disposed in the shielding box;

[0010] The UWB coupling antenna is connected to the UWB test module to obtain or output a radio frequency signal based on the UWB communication protocol;

[0011] The BLE coupling antenna is connected to the BLE test module to obtain or output a radio frequency signal based on the BLE communication protocol.

[0012] Furthermore, the UWB test module is provided with a UWB comprehensive tester connected to the UWB coupling antenna through a first RF high-frequency line, which is used to send a radio frequency signal based on the UWB communication protocol or obtain a feedback signal of the device to be tested for the sent radio frequency signal according to the instruction of the control module.

[0013] Furthermore, a power divider is arranged between the UWB coupling antenna and the UWB comprehensive tester, which is used to provide signal delay and signal attenuation on the signal path between the device to be tested and the UWB comprehensive tester.

[0014] Furthermore, the BLE test module is provided with a BLE comprehensive tester connected to the BLE coupling antenna through a second RF high-frequency line, which is used to send a radio frequency signal based on the BLE communication protocol according to the instructions of the control module or obtain a feedback signal of the device to be tested for the sent radio frequency signal.

[0015] Furthermore, a combiner is configured between the BLE coupling antenna and the BLE comprehensive tester, which is used to combine the radio frequency signals sent by the BLE comprehensive tester into a shared transmission path so as to be sent to the device to be tested through the BLE coupling antenna.

[0016] Further, the control module includes: a terminal, and a control board and a power supply connected to the terminal;

[0017] The power supply is used to supply power to the equipment to be tested;

[0018] The control board is configured with working instructions so that the device to be detected enters the working mode after power-on.

[0019] Furthermore, the control board and the device to be detected are electrically connected via the CAN communication protocol, so that the device to be detected enters the working mode after receiving the working instruction sent by the control board.

[0020] Furthermore, the terminal is connected to the UWB test module and the BLE test module respectively to control the UWB test module and the BLE test module to send RF signals to the shielding box respectively, or receive feedback signals sent by the UWB test module and the BLE test module to output RF performance test results of the device to be tested.

[0021] The present invention also provides a method for detecting radio frequency performance of a digital key for an automobile, which is applied to the above-mentioned radio frequency performance detection device for a digital key for an automobile, and the method comprises:

[0022] When the device to be tested has entered the working mode, in response to the radio frequency performance detection instruction, the UWB test module or the BLE test module is controlled to provide a radio frequency signal to the shielding box, so that the device to be tested outputs a feedback signal for the transmitted radio frequency signal;

[0023] According to the feedback signal, the radio frequency performance test result of the device to be tested is obtained.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] (1) The UWB comprehensive tester and the BLE comprehensive tester are respectively connected through the control module, so that at least one of the UWB comprehensive tester and the BLE comprehensive tester is controlled by the control module to provide the UWB communication network or the BLE communication network to the shielding box 11, and then the device to be tested is put into working mode through the control board and the power supply to receive the radio frequency signal sent by at least one of the UWB test module and the BLE test module, and the terminal 24 obtains the feedback signal of the device to be tested for the sent radio frequency signal, so as to realize the detection of the UWB radio frequency performance and the BLE radio frequency performance of the device to be tested, thereby facilitating the improvement of the detection efficiency and detection accuracy of the radio frequency performance of the device to be tested;

[0026] (2) This solution customizes the design of test tools, which can flexibly configure different devices to be tested, making future RF products reusable.

[0027] (3) In the same shielding box, the BLE and UWB RF performance can be tested in parallel, greatly shortening the test time and improving productivity; and multiple devices to be tested can be tested in parallel, further improving test efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a schematic diagram of a radio frequency performance detection device provided in this embodiment;

[0030] Figure 2 It is a flowchart of the steps of the radio frequency performance detection method provided in this embodiment. DETAILED DESCRIPTION

[0031] It should be noted that, in the description of the present invention, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0035] like Figure 1 As shown, this embodiment provides a UWB and BLE car digital key radio frequency performance testing device, wherein the shielding box module 100 includes a shielding box body 11, a device to be tested (DUT, Device Under Test) 12, a BLE coupling antenna 13, and a UWB coupling antenna 14.

[0036] The shielding box 11 provides a shielding environment for the device to be tested 12 to prevent the device to be tested from being interfered by external radio frequency signals. Preferably, multiple devices to be tested 12 can be arranged in the shielding box 11 to achieve simultaneous testing of multiple devices to save testing time.

[0037] The device to be tested 12 has both UWB and BLE communication functions, and is connected to one end of the communication and power harness 21 in the control module 200. The UWB coupling antenna 14 is connected to the first RF high-frequency line 33 in the UWB test module 300. The BLE coupling antenna 13 is connected to the second RF high-frequency line 41 in the BLE test module 400.

[0038] The control module 200 includes a communication and power harness 21, a control board and power supply 22, a communication connection harness 23, and a terminal 24. The other end of the communication and power harness 21 is connected to the control board and power supply 22, the control board and power supply 22 are connected to one end of the communication connection harness 23, and the other end of the communication connection harness 23 is connected to the terminal 24. The terminal 24 is connected to one end of the communication line 34 in the UWB test module 300, and the terminal 24 is also connected to one end of the communication line 45 in the BLE test module 400.

[0039] Among them, the control module may refer to a device that controls and manages other devices by operating or adjusting other devices, including but not limited to electronic devices, instruments, etc.; in specific applications, it may be a control computer that controls other devices through program control and instruction execution.

[0040] The UWB test module 300 includes a power divider 31, a third RF high-frequency line 32, a first RF high-frequency line 33, a communication line 34, and a UWB comprehensive tester 35. One end of the power divider 31 is connected to the third RF high-frequency line 32, and the other end of the power divider 31 is connected to the first RF high-frequency line 33. The other end of the third RF high-frequency line 32 is connected to the UWB comprehensive tester 35, the other end of the first RF high-frequency line 33 is connected to the UWB coupling antenna 14 in the shielding box module 100, and the UWB comprehensive tester 35 is connected to the other end of the communication line 34.

[0041] The power divider 31 is a set of accessories for UWB to perform ToF (Time of Flight) measurement, which can provide fixed group delay and insertion loss on the signal path. This is of great significance for antenna delay calibration and system path loss calibration.

[0042] The BLE test module 400 includes a second RF high-frequency line 41, a combiner 42, a fourth RF high-frequency line 43, a BLE comprehensive tester 44, and a communication line 45. One end of the second RF high-frequency line 41 is connected to the BLE coupling antenna 13 in the shielding box module 100, the other end of the second RF high-frequency line 41 is connected to one end of the combiner 42, the other end of the combiner 42 is connected to one end of the fourth RF high-frequency line 43, the other end of the fourth RF high-frequency line 43 is connected to the BLE comprehensive tester 44, and the BLE comprehensive tester 44 is connected to one end of the communication line 45.

[0043] The combiner 42 is used to combine the TX-RX signals of the BLE comprehensive tester. It can combine two independent signals into a shared transmission path.

[0044] The shielding box module 100 provides an antenna coupling test environment and a coupling antenna for receiving the RF signal of the device to be tested for the device to be tested. The control module 200 provides power supply for the device to be tested, controls the device to be tested to enter the working mode through CAN communication, controls the UWB test module and the BLE test module to enter the RF test state through the terminal 24, and receives the RF test results. The UWB test module transmits and receives UWB RF signals to measure the UWB RF performance of the device to be tested, and the BLE test module transmits and receives BLE RF signals to measure the BLE RF performance of the device to be tested.

[0045] In the detection device provided in this embodiment, the control module 200 can be used to control the UWB comprehensive tester 35 and the BLE comprehensive tester 44 to be turned on or off respectively, to simulate the switching operation of the UWB communication protocol and the BLE communication protocol that may exist in the actual application environment of the device to be detected, so as to obtain the RF performance detection result of the device to be detected that is closer to the actual application environment. For example, according to the actual test scenario requirements, in the A period, the terminal 24 can control the UWB comprehensive tester 35 to provide a radio frequency signal and control the BLE comprehensive tester 44 to turn off the BLE communication; in the B period, the terminal 24 controls the BLE comprehensive tester 44 to turn off the BLE communication and controls the UWB comprehensive tester 35 to provide UWB communication.

[0046] In the above system, the UWB comprehensive tester 35 and the BLE comprehensive tester 44 are respectively connected through the control module 200, so that the control module 200 is used to control at least one of the UWB comprehensive tester 35 and the BLE comprehensive tester 44 to provide the UWB communication network or the BLE communication network to the shielding box 11, so that the device to be tested can be connected to the UWB communication network or the BLE communication network, and then the control board and the power supply 22 are used to make the device to be tested enter the working mode and receive the RF signal sent by at least one of the UWB test module and the BLE test module, and the terminal 24 obtains the feedback signal of the device to be tested for the sent RF signal, thereby realizing the detection of the UWB RF performance and the BLE RF performance of the device to be tested, which is beneficial to improve the RF performance detection efficiency and detection accuracy of the device to be tested.

[0047] The RF performance test results may include but are not limited to the evaluation results of performance indicators such as throughput, transmission rate, packet loss rate, and latency.

[0048] Of course, the control module 200 can control the UWB comprehensive tester 35 and the BLE comprehensive tester 44 to send radio frequency signals to the device to be tested at the same time to perform parallel testing, thereby shortening the test time and testing the interference between the two radio frequency signals.

[0049] Optionally, through a UWB coupling antenna set in the shielding box, the radio frequency signal provided by the UWB comprehensive tester is sent into the shielding box, and the corresponding signal sent by the device to be tested is received, and the UWB comprehensive tester receives the signal acquired by the UWB coupling antenna; through a BLE coupling antenna set in the shielding box, the radio frequency signal provided by the BLE comprehensive tester is sent into the shielding box, and the corresponding signal sent by the device to be tested is received, and the BLE comprehensive tester receives the signal acquired by the BLE coupling antenna.

[0050] In this embodiment, a UWB coupling antenna and a UWB comprehensive tester are used to provide a UWB radio frequency signal into a shielded box and receive a feedback signal; and a BLE coupling antenna and a BLE comprehensive tester are used to provide a BLE radio frequency signal into a shielded box and receive a feedback signal. This can simulate the actual application scenario of communication between a car electronic key and the entire vehicle, so as to improve the effectiveness of radio frequency performance testing of a car electronic key.

[0051] In this embodiment, the comprehensive tester and the coupling antenna are connected by an RF high-frequency line, so as to ensure the quality and stability of RF signal transmission, facilitate RF signal testing and analysis, and protect the safe transmission of RF signals.

[0052] In this embodiment, the control board and power supply 22 have built-in working instructions and power supply for controlling the device to be detected 12, and provide power to the device to be detected 12 and communicate with the device to be detected 12 through the communication and power harness 21 so that the device to be detected 12 enters the working mode after power-on. Specifically, the control board and the device to be detected are electrically connected through the CAN communication protocol so that the device to be detected enters the working mode after receiving the working instructions sent by the control board.

[0053] In an exemplary embodiment, Figure 2 As shown, a method for detecting radio frequency performance of a digital key for automobile is provided. The method can be applied to the above-mentioned radio frequency performance detection device for a digital key for automobile. This embodiment uses the method applied to the radio frequency performance detection device for a digital key for automobile as an example. The method includes the following steps:

[0054] Step S1, when the device to be tested has entered the working mode, in response to the radio frequency performance detection instruction, controlling the UWB test module and / or the BLE test module to provide a radio frequency signal to the shielding box, so that the device to be tested outputs a feedback signal for the transmitted radio frequency signal;

[0055] Step S2: obtaining a radio frequency performance test result of the device to be tested according to the feedback signal.

[0056] Through the control board and the power supply 22, the device to be tested enters the working mode and receives the RF signal sent by at least one of the UWB test module and the BLE test module, and the terminal 24 obtains the feedback signal of the device to be tested for the RF signal sent, thereby realizing the detection of the UWB RF performance and the BLE RF performance of the device to be tested, which is beneficial to improving the RF performance detection efficiency and detection accuracy of the device to be tested.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A radio frequency performance testing device for a car digital key, characterized in that: include: A shielding box module, a UWB test module, a BLE test module, and a control module connected to the shielding box module, the UWB test module, and the BLE test module respectively; The shielding box module includes a shielding box body, which is used to accommodate at least two devices to be tested and shield the external radio frequency signals from interfering with the devices to be tested; The control module is used to control the device to be tested to enter a working mode so that the device to be tested obtains a radio frequency signal sent by at least one of the UWB test module and the BLE test module, and is used to obtain a feedback signal of the device to be tested for the sent radio frequency signal; And according to the feedback signal, a radio frequency performance test result of the device to be tested is obtained.

2. The radio frequency performance testing device for a digital car key according to claim 1, characterized in that: The shielding box module also includes a UWB coupling antenna and a BLE coupling antenna disposed in the shielding box; The UWB coupling antenna is connected to the UWB test module to obtain or output a radio frequency signal based on the UWB communication protocol; The BLE coupling antenna is connected to the BLE test module to obtain or output a radio frequency signal based on the BLE communication protocol.

3. The radio frequency performance testing device for a digital car key according to claim 2, characterized in that: The UWB test module is provided with a UWB comprehensive tester connected to the UWB coupling antenna through a first RF high-frequency line, which is used to send a radio frequency signal based on the UWB communication protocol or obtain a feedback signal of the terminal to be tested for the sent radio frequency signal according to the instruction of the control module.

4. The radio frequency performance testing device for a digital car key according to claim 3 is characterized in that: A power divider is arranged between the UWB coupling antenna and the UWB comprehensive tester, and is used to provide signal delay and signal attenuation on the signal path between the device to be tested and the UWB comprehensive tester.

5. The radio frequency performance testing device for a digital car key according to claim 2, characterized in that: The BLE test module is provided with a BLE comprehensive tester connected to the BLE coupling antenna through a second RF high-frequency line, which is used to send a radio frequency signal based on the BLE communication protocol or obtain a feedback signal of the terminal to be tested for the sent radio frequency signal according to the instruction of the control module.

6. The radio frequency performance testing device for a digital car key according to claim 5, characterized in that: A combiner is configured between the BLE coupling antenna and the BLE comprehensive tester, which is used to combine the radio frequency signal sent by the BLE comprehensive tester into a shared transmission path so as to send it to the device to be tested through the BLE coupling antenna.

7. The radio frequency performance testing device for a digital car key according to claim 3 or 5, characterized in that: The control module includes: a terminal, a control panel connected to the terminal, and a power supply; The power supply is used to supply power to the device to be detected; The control panel is configured with working instructions so that the device to be detected enters a working mode after being powered on.

8. The radio frequency performance testing device for a digital car key according to claim 7, characterized in that: The control board is electrically connected to the device to be detected via the CAN communication protocol, so that the device to be detected enters a working mode after receiving a working instruction sent by the control board.

9. The radio frequency performance testing device for a digital car key according to claim 7, characterized in that: The terminal is connected to the UWB test module and the BLE test module respectively to control the UWB test module and the BLE test module to send radio frequency signals to the shielding box respectively, or receive feedback signals sent by the UWB test module and the BLE test module to output the radio frequency performance test results of the device to be tested.

10. A method for detecting radio frequency performance of a digital key of an automobile, characterized in that: Applied to the automobile digital key radio frequency performance detection device as described in any one of claims 1 to 9, the method comprises: When the device to be tested has entered the working mode, in response to the radio frequency performance detection instruction, control the UWB test module and / or the BLE test module to provide a radio frequency signal to the shielding box, so that the device to be tested outputs a feedback signal for the transmitted radio frequency signal; A radio frequency performance test result of the device to be tested is obtained according to the feedback signal.

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