Device and method for testing C4 signal of transponder

Abstract

The invention provides a transponder C4 signal test device and method, the device comprises an upper computer and a lower computer, the lower computer comprises a test signal generation module, a load module, a signal transceiver module and a signal acquisition module; the test signal generation module generates a coupling test signal and a radio frequency ramp signal, and sends the coupling test signal to the C interface of the transponder to be tested; the signal transceiving module sends the received radio frequency ramp signal to a transponder and receives a transponder feedback message signal sent by the transponder; and the upper computer determines a test result of the C4 signal of the transponder based on the radio frequency ramp signal, the transponder feedback message signal, the load module and the port signal of the C interface of the to-be-tested transponder. According to the application, the proper C1 signal, C6 signal and radio frequency ramp signal are selected to test the C4 signal of the transponder, the C4 signal test is carried out on the transponder under the actual use scene of restoring the C interface of the transponder, and the reliability of the C4 signal test of the transponder is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of railway equipment, and in particular to a testing device and method for a transponder C4 signal. Background Art

[0002] The balise is mainly used to transmit reliable ground fixed information and variable information to the train control system, and is used to achieve mutual communication between the ground and the train at a specific location. Balises include passive balises and active balises. The active balise is connected to the ground electronic unit (LEU) through the C interface, and can change the transmitted data message in real time.

[0003] The C interface is functionally divided into C1 sub-interface, C4 sub-interface and C6 sub-interface. The C1 sub-interface is the data interface for the ground electronic unit LEU to transmit the balise message to the active balise, and is used to transmit the C1 signal; the C4 sub-interface is used when the train passes the active balise, and the active balise generates the C4 signal of the passing train, and sends the C4 signal of the passing train to the ground electronic unit LEU; the C6 sub-interface is the interface for the ground electronic unit LEU to provide power to the active balise interface circuit, and is used to transmit the C6 signal that provides power to the active balise interface circuit.

[0004] In order to ensure that the transponder can work properly, the transponder C interface needs to be tested. In the prior art, when testing the C4 signal of the active transponder C interface, only one signal of the interface is often considered, such as only the C6 signal. In this case, the transponder may not work properly because there is no access to the C1 signal, resulting in an erroneous test result. Therefore, the reliability of the existing transponder C4 signal test result is poor. Summary of the invention

[0005] In view of this, the present application provides a transponder C4 signal testing device and method to ensure the reliability of the transponder C4 signal testing.

[0006] The technical solution is as follows:

[0007] In a first aspect, an embodiment of the present application provides a transponder C4 signal testing device, the device comprising: a host computer and a slave computer, wherein the slave computer comprises: a test signal generating module, a load module, a signal transceiver module and a signal acquisition module; wherein,

[0008] The host computer is connected to the test signal generation module, and the host computer is used to control the test signal generation module to generate a test signal, wherein the test signal includes: a coupling test signal and a radio frequency ramp signal, and the coupling test signal is obtained by coupling the C1 signal and the C6 signal;

[0009] The test signal generating module is used to send the coupling test signal to the C interface of the transponder to be tested via the load module;

[0010] The signal transceiver module is used to send the received radio frequency ramp signal to the transponder to be tested, and receive the transponder feedback message signal sent by the transponder to be tested;

[0011] The signal acquisition module is used to collect the target test signal and send the target test signal to the host computer so that the host computer obtains the test result of the C4 signal of the transponder to be tested based on the target test signal. The target test signal includes: the RF ramp signal, the transponder feedback message signal, the load module port signal and the C interface port signal of the transponder to be tested.

[0012] Optionally, the test signal generating module includes: a first signal generating submodule, a second signal generating submodule, a third signal generating submodule and a coupling submodule; wherein,

[0013] The first signal generating submodule is used to generate the C1 signal, the second signal generating submodule is used to generate the C6 signal, the third signal generating submodule is used to generate the RF ramp signal, and the coupling submodule is used to couple the C1 signal and the C6 signal into the coupling test signal.

[0014] Optionally, the host computer includes: a signal control module; wherein the signal control module is used to control the test signal generation module to generate a test signal that meets test requirements, and the test requirements include test frequency requirements and test amplitude requirements.

[0015] Optionally, the signal frequency of the C6 signal is one of 8.72 kHz, 8.82 kHz and 8.92 kHz.

[0016] Optionally, the load module includes: a 20 ohm resistor module.

[0017] Optionally, the host computer includes: a trigger signal sending module; wherein the trigger signal sending module is used to send a trigger signal to the signal acquisition module when the RF ramp signal reaches a preset RF energy, so that the signal acquisition module acquires the target test signal.

[0018] Optionally, the signal acquisition module includes: a first signal acquisition submodule, a second signal acquisition submodule, a third signal acquisition submodule and a fourth signal acquisition submodule; wherein,

[0019] The first signal acquisition submodule is used to collect the RF ramp signal from the third signal generation submodule; the second signal acquisition submodule is used to collect the transponder feedback message signal from the signal transceiver module; the third signal acquisition submodule is used to collect the load module port signal from both ends of the load module; the fourth signal acquisition submodule is used to collect the C interface port signal of the transponder to be tested from the C interface end of the transponder to be tested.

[0020] Optionally, the host computer includes: a data processing module; the data processing module is used to:

[0021] Acquire a load current signal according to the load module port signal;

[0022] Filter the load current signal and the C-interface port signal of the transponder to be tested according to a preset filtering algorithm to obtain impedance modulus change information and activation state duration of the C-interface of the transponder to be tested, wherein the preset filtering algorithm includes: Butterworth low-pass filtering and smoothing filtering;

[0023] Determine the activation response time and message continuity of the C interface of the transponder to be tested according to the radio frequency ramp signal and the transponder feedback message signal;

[0024] The C4 signal test result of the transponder to be tested is determined based on the impedance modulus change information, the activation state duration, the activation response time, and the message continuity.

[0025] Optionally, the host computer includes: a display module; the display module is used to view the C4 signal test result of the transponder to be tested in real time.

[0026] In a second aspect, an embodiment of the present application provides a method for testing a transponder C4 signal, the method being applied to any transponder C4 signal testing device of the first aspect, the method comprising:

[0027] Generate a test signal based on the test requirements, the test signal includes: a coupled test signal and a radio frequency ramp signal, the coupled test signal is obtained by coupling the C1 signal and the C6 signal, and the test requirements include a test frequency requirement and a test amplitude requirement;

[0028] The coupling signal is sent to the C interface of the transponder to be tested via the load module, and the radio frequency ramp signal is sent to the signal transceiver module after a preset time, so that the signal transceiver module sends the radio frequency ramp signal to the transponder to be tested and receives the transponder feedback message signal sent by the transponder to be tested;

[0029] When the RF ramp signal reaches the preset RF energy, a target test signal is collected and sent to a host computer so that the host computer determines the test result of the C4 signal of the transponder to be tested based on the target test signal. The target test signal includes: the RF ramp signal, the transponder feedback message signal, the load module port signal, and the C interface port signal of the transponder to be tested.

[0030] The above technical solution has the following beneficial effects:

[0031] An embodiment of the present application provides a test device and method for a transponder C4 signal, wherein the device includes: a host computer and a slave computer, the slave computer includes: a test signal generating module, a load module, a signal transceiver module and a signal acquisition module; wherein the host computer is connected to the test signal generating module, and the host computer is used to control the test signal generating module to generate a test signal, the test signal includes: a coupling test signal and a radio frequency ramp signal, and the coupling test signal is obtained by coupling a C1 signal and a C6 signal; the test signal generating module is used to send the coupling test signal to the C interface of the transponder to be tested via the load module; the signal transceiver module is used to send the received radio frequency ramp signal to the transponder to be tested, and receive the transponder feedback message signal sent by the transponder to be tested; the signal acquisition module is used to collect a target test signal, and send the target test signal to the host computer, so that the host computer obtains the test result of the C4 signal of the transponder to be tested based on the target test signal, and the target test signal includes: a radio frequency ramp signal, a transponder feedback message signal, a load module port signal and a C interface port signal of the transponder to be tested. The host computer of the transponder C4 signal testing device provided in the embodiment of the present application can select appropriate C1 signal, C6 signal and RF ramp signal to test the C4 signal of the transponder C interface, and test the transponder C4 signal in a fully restored actual usage scenario of the transponder C interface to ensure the reliability of the transponder C4 signal test. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the radio frequency energy and interface impedance change of a transponder in a vehicle passing scenario provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of a transponder C4 signal testing device provided in an embodiment of the present application;

[0035] Figure 3 A flowchart of a method for testing a transponder C4 signal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not 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 are within the scope of protection of this application.

[0037] When the active balise is used on site, when the balise detects a train passing by, it will transmit the passing signal to the ground electronic unit LEU by changing the impedance of the C interface. Figure 1 , shows the schematic diagram of the RF energy and C-interface impedance changes of the balise when a train passes by. When the balise is not activated, the impedance modulus |Z| 未激活 In the transponder test at 150Ω to 300Ω, it is required that the interface C4 signal appears within Td time after the RF energy Flux received by the transponder reaches φd1, or the interface C4 signal (passing signal) appears before the RF energy Flux received by the transponder reaches φd1, and the signal is maintained for T time, where Td is less than 150us and T is between 150us and 350us. At this time, the impedance modulus of the transponder is a maximum of 0.1x|Z| 未激活 , and the reference receiver should be able to correctly receive the message sent by the transponder (all-1 message), and the message should not be interrupted during the period when the interface C4 signal appears.

[0038] As described in the background technology, in the existing test of the C4 signal of the C interface of the active transponder, only one signal of the interface is considered, for example, only the C6 signal is considered. In this case, the transponder may not work properly due to the lack of access to the C1 signal, resulting in erroneous test results. Therefore, the reliability of the existing test results of the C4 signal of the C interface of the transponder is poor.

[0039] In order to ensure the reliability of the transponder C interface test, the present application embodiment provides a transponder C4 signal test device, please refer to Figure 2 The structure diagram of a transponder C4 signal test device is shown, the device includes: a host computer and a slave computer, wherein the slave computer includes: a test signal generating module, a load module, a signal transceiver module and a signal acquisition module; wherein,

[0040] The upper computer is connected to the test signal generation module of the lower computer. The upper computer can control the test signal generation module to generate a test signal. The test signal includes: a coupling test signal and a radio frequency ramp signal. The coupling test signal is obtained by coupling the C1 signal with the C6 signal.

[0041] Specifically, the host computer controls the test signal generation module to generate a coupling test signal and a radio frequency ramp signal obtained by coupling the C1 signal and the C6 signal, wherein the signal frequency of the C6 signal is specifically one of 8.72kHz, 8.82kHz and 8.92kHz, and the selection of the signal frequency is indicated and operated by the host computer, and the radio frequency ramp signal is specifically a tuned wave of a triangle wave and a 27MHz sine signal.

[0042] In an optional implementation, the test signal generating module includes: a first signal generating submodule, a second signal generating submodule, a third signal generating submodule and a coupling submodule; wherein the first signal generating submodule is used to generate a C1 signal, the second signal generating submodule is used to generate a C6 signal, the third signal generating submodule is used to generate a radio frequency ramp signal, and the coupling submodule is used to couple the C1 signal and the C6 signal into a coupled test signal.

[0043] In an optional implementation, the host computer includes: a signal control module; wherein the signal control module is used to control the test signal generation module to generate a test signal that meets the test requirements, and the test requirements include test frequency requirements and test amplitude requirements.

[0044] Specifically, the host computer can adjust and control the frequency and amplitude of the C1 signal, C6 signal and radio frequency ramp signal generated by the test signal generation module, so as to generate a test signal that meets the test requirements.

[0045] It can be understood that the C1 signal, C6 signal and RF ramp signal are all necessary signal sources for restoring the actual usage scenario of the transponder C interface. The embodiment of the present application generates and sends the C6 signal and C1 signal and RF ramp signal of the corresponding frequency to the transponder to lay the foundation for the subsequent reliable testing of the transponder.

[0046] The test signal generating module is used to send the coupling test signal to the C interface of the transponder to be tested via the load module.

[0047] Specifically, the coupling submodule of the test signal generation module is connected to the load module, and the load module is connected to the C interface of the transponder to be tested, so that the test signal generation module sends the coupling test signal to the C interface of the transponder to be tested through the load module.

[0048] In an optional implementation, the load module may include a 20-ohm resistor module.

[0049] Specifically, a 20-ohm resistor module is connected in series between the C-interface cable and the coupling submodule to facilitate subsequent collection of the current value of the C-interface cable.

[0050] The signal transceiver module is used to send the received radio frequency ramp signal to the transponder to be tested, and receive the transponder feedback message signal sent by the transponder to be tested.

[0051] Specifically, the third signal generating submodule in the signal transceiver module is connected to the signal transceiver module, and the signal transceiver module can receive the RF ramp signal, send the RF ramp signal to the transponder to be tested, and receive the transponder feedback message signal sent back by the transponder.

[0052] It should be noted that the signal transceiver module may include a 27Mhz transmitting antenna and a 4Mhz receiving antenna, wherein the 27Mhz transmitting antenna is used to send the RF ramp signal to the transponder to be tested, and the 4Mhz receiving antenna is used to receive the transponder feedback message signal sent back by the transponder, and the transponder feedback message signal is specifically a frequency shift keying (FSK) signal.

[0053] The signal acquisition module is used to collect the target test signal and send the target test signal to the host computer so that the host computer determines the test result of the transponder to be tested based on the target test signal. The target test signal includes: RF ramp signal, transponder feedback message signal, load module port signal and C interface port signal of the transponder to be tested.

[0054] Specifically, the signal acquisition module can collect RF ramp signals, transponder feedback message signals, load module port signals and C interface port signals of the transponder to be tested; and feed these signals back to the host computer, which processes the data to obtain the test results of the transponder to be tested.

[0055] It can be understood that the transponder testing device provided in the embodiment of the present application can test the C4 signal of the transponder C interface in the actual usage scenario of the transponder C interface based on the C1 signal, C6 signal and RF ramp signal, thereby ensuring the reliability of the transponder C4 signal test.

[0056] In an optional implementation, the host computer includes: a trigger signal sending module, which is used to send a trigger signal to the signal acquisition module when the RF ramp signal reaches a preset RF energy, so that the signal acquisition module acquires the target test signal.

[0057] Specifically, when the RF ramp signal reaches the preset RF energy, the host computer sends a trigger signal to the signal acquisition module so that the signal acquisition module acquires the target test signal. It is understandable that the signal acquisition module does not need to maintain the acquisition working state, but starts the acquisition work after the trigger signal of the host computer is triggered. Exemplarily, since the transponder should have an interface C4 signal (a passing signal sent to the ground electronic unit LEU) within 150us after the received RF energy reaches φd1, the preset RF energy can be set to φd1.

[0058] In an optional implementation, the signal acquisition module includes: a first signal acquisition submodule, a second signal acquisition submodule, a third signal acquisition submodule and a fourth signal acquisition submodule; wherein the first signal acquisition submodule is used to collect the radio frequency ramp signal from the third signal generation submodule; the second signal acquisition submodule is used to collect the transponder feedback message signal from the signal transceiver module; the third signal acquisition submodule is used to collect the load module port signal from both ends of the load module; the fourth signal acquisition submodule is used to collect the C interface port signal of the transponder to be tested from the C interface end of the transponder to be tested.

[0059] Specifically, the signal acquisition module is divided into four signal acquisition sub-modules, which respectively collect the RF ramp signal from the third signal generation sub-module, collect the transponder feedback message signal from the signal transceiver module, collect the load module port signal from both ends of the load module, and collect the C interface port signal of the transponder to be tested from the C interface end of the transponder to be tested.

[0060] In an optional implementation, the host computer includes a data processing module; the data processing module is used to: obtain a load current signal according to a load module port signal; filter the load current signal and the C interface port signal of the transponder to be tested according to a preset filtering algorithm to obtain the impedance modulus change information and the activation state duration of the C interface of the transponder to be tested, and the preset filtering algorithm includes: Butterworth low-pass filtering and smoothing filtering; determine the activation response time and message continuity of the C interface of the transponder to be tested according to the RF ramp signal and the transponder feedback message signal; determine the C4 signal test result of the transponder to be tested based on the impedance modulus change information, the activation state duration, the activation response time and the message continuity.

[0061] Specifically, the host computer processes the collected four-channel target test signals. On the one hand, the load module port signal is converted into a load current signal, and the impedance modulus change when the C interface is in the activated state is obtained in combination with the C interface port signal of the transponder to be tested. Furthermore, since the C interface signal is obtained by coupling the C1 signal and the C6 signal, the preset Butterworth low-pass filter and smoothing filter algorithm are used to filter the collected load current signal and the C interface port signal of the transponder to be tested, and the C1 signal is filtered out to accurately calculate the impedance modulus change information of the C interface of the transponder to be tested and the duration of the activation state. On the other hand, the host computer synchronously processes the 27MHz RF ramp signal and the FSK signal, and determines the activation response time and message continuity of the C interface of the transponder to be tested based on the 27MHz RF ramp signal and the transponder feedback message FSK signal.

[0062] Exemplarily, the RF ramp signal is generated by the host computer control. When the RF energy of the RF ramp signal reaches φd1, the time when the transponder feedback message FSK signal is detected is calculated. This time is the activation response time of the C interface of the transponder to be tested. The transponder feedback message FSK signal is an all-1 signal, and the message can be decoded to determine its continuity.

[0063] In an optional implementation, the host computer includes: a display module; the display module is used to view the C4 signal test result of the transponder to be tested in real time. Exemplarily, the display module can be implemented using a display.

[0064] It should be noted that in the embodiment of the present application, the upper computer and the lower computer can be connected via a data cable, and a signal connection or a data connection can be achieved through a protocol connection so as to realize data interaction between the two. Among them, the upper computer can generally be implemented using a computer, a workstation or a server, and the present application limits the specific form of the upper computer.

[0065] It can be seen from the above technical solution that this embodiment provides a transponder C4 signal testing device, which has the following advantages:

[0066] (1) The host computer automatically sets the sending of C1 signal, C6 signal and 27MHz RF ramp signal to restore the real usage scenario of the transponder and ensure the reliability of the test.

[0067] (2) The lower computer collects and transmits the circuit signal to the upper computer. The upper computer processes the collected load current signal and the C-interface port signal of the transponder to be tested, implements Butterworth low-pass filtering and smoothing filtering, and accurately calculates the impedance modulus change information of the transponder C-interface and the activation state duration.

[0068] (3) Synchronously decode the collected FSK signal (transponder feedback message signal) to confirm that the message is not interrupted during the period when the interface C4 signal (passing signal) appears, thereby realizing the test of message continuity.

[0069] (4) The host computer can display the test status in real time.

[0070] The present application also provides a method for testing a transponder C4 signal, which is applied to any of the above-mentioned transponder C4 signal testing devices. Figure 3 , a schematic flow chart of the method is shown, and the method may include:

[0071] Step S100: Generate a test signal based on a test requirement, the test signal includes: a coupled test signal and a radio frequency ramp signal, the coupled test signal is obtained by coupling a C1 signal with a C6 signal, and the test requirement includes a test frequency requirement and a test amplitude requirement.

[0072] Specifically, the upper computer controls the lower computer to generate a coupling test signal and a radio frequency ramp signal according to the test requirements.

[0073] Step S200: Send the coupling signal to the C interface of the transponder to be tested via the load module, and send the RF ramp signal to the signal transceiver module after a preset time, so that the signal transceiver module sends the RF ramp signal to the transponder to be tested and receives the transponder feedback message signal sent by the transponder to be tested.

[0074] Specifically, the coupling signal is first sent to the C interface of the transponder to be tested via the load module, and then the RF ramp signal is sent to the signal transceiver module after a preset time. The time interval for sending the coupling signal and the RF ramp signal is to simulate the real scene of the transponder passing by, to ensure that the transponder has received the coupling signal when the RF ramp signal is sent, to avoid test abnormalities caused by asynchronous signal reception. Exemplarily, the preset time length can be set to 10 seconds. After receiving the RF ramp signal, the signal transceiver module will send the signal to the transponder to be tested through the 27MHz antenna. After receiving the RF ramp signal, the transponder to be tested is activated and sends the transponder feedback message signal, which is received by the 4MHz antenna of the signal transceiver module.

[0075] Step S300: When the RF ramp signal reaches the preset RF energy, the target test signal is collected and sent to the host computer so that the host computer determines the test result of the C4 signal of the transponder to be tested based on the target test signal. The target test signal includes: the RF ramp signal, the transponder feedback message signal, the load module port signal and the C interface port signal of the transponder to be tested.

[0076] Specifically, when the RF ramp signal reaches the preset RF energy φ d1When the host computer controls the signal acquisition module to acquire the target test signal, and determines the test result of the transponder to be tested based on the target test signal.

[0077] In an optional implementation, in the above step S300, the upper computer determines the test result of the C4 signal of the transponder to be tested based on the target test signal, including: obtaining a load current signal according to the load module port signal; filtering the load current signal and the C interface port signal of the transponder to be tested according to a preset filtering algorithm to obtain the impedance modulus change information and the activation state duration of the C interface of the transponder to be tested, and the preset filtering algorithm includes: Butterworth low-pass filtering and smoothing filtering; determining the activation response time and message continuity of the C interface of the transponder to be tested according to the RF ramp signal and the transponder feedback message signal; determining the test result of the C4 signal of the transponder to be tested based on the impedance modulus change information, the activation state duration, the activation response time and the message continuity.

[0078] It should be noted that the technical steps and related technical features included in a method provided in an embodiment of the present application correspond to the device provided in the embodiment of the application. The description of the method part can refer to the embodiment of the aforementioned device part and will not be repeated here.

[0079] It can be seen from the above technical solution that this embodiment provides a method for testing the transponder C4 signal. The method can select appropriate C1 signal, C6 signal and RF ramp signal to test the transponder C interface, and fully restore the actual usage scenario of the transponder C interface to test the C4 signal of the transponder C interface, thereby ensuring the reliability of the transponder C4 signal test.

[0080] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0081] Those skilled in the art can understand that the flowchart shown in the figure is only an example in which the embodiments of the present application can be implemented, and the scope of application of the embodiments of the present application is not limited by any aspect of the flowchart.

[0082] In the several embodiments provided in the present application, it should be understood that the disclosed methods, devices and equipment can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple 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 connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the device or unit can be electrical, mechanical or other forms.

[0083] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0084] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0085] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transponder C4 signal testing device, characterized in that: The device comprises: an upper computer and a lower computer, wherein the lower computer comprises: a test signal generating module, a load module, a signal transceiver module and a signal acquisition module; wherein, The host computer is connected to the test signal generation module, and the host computer is used to control the test signal generation module to generate a test signal, wherein the test signal includes: a coupling test signal and a radio frequency ramp signal, and the coupling test signal is obtained by coupling the C1 signal and the C6 signal; The test signal generating module is used to send the coupling test signal to the C interface of the transponder to be tested via the load module; The signal transceiver module is used to send the received radio frequency ramp signal to the transponder to be tested, and receive the transponder feedback message signal sent by the transponder to be tested; The signal acquisition module is used to collect the target test signal and send the target test signal to the host computer so that the host computer determines the test result of the C4 signal of the transponder to be tested based on the target test signal. The target test signal includes: the RF ramp signal, the transponder feedback message signal, the load module port signal and the C interface port signal of the transponder to be tested.

2. The testing device according to claim 1, characterized in that: The test signal generating module comprises: a first signal generating submodule, a second signal generating submodule, a third signal generating submodule and a coupling submodule; wherein, The first signal generating submodule is used to generate the C1 signal, the second signal generating submodule is used to generate the C6 signal, the third signal generating submodule is used to generate the RF ramp signal, and the coupling submodule is used to couple the C1 signal and the C6 signal into the coupling test signal.

3. The testing device according to claim 1, characterized in that: The host computer includes: a signal control module; wherein the signal control module is used to control the test signal generation module to generate a test signal that meets test requirements, and the test requirements include test frequency requirements and test amplitude requirements.

4. The testing device according to claim 1, characterized in that: The signal frequency of the C6 signal is one of 8.72 kHz, 8.82 kHz and 8.92 kHz.

5. The testing device according to claim 1, characterized in that: The load module includes: a 20 ohm resistor module.

6. The testing device according to claim 1, characterized in that: The host computer includes: a trigger signal sending module; wherein the trigger signal sending module is used to send a trigger signal to the signal acquisition module when the RF ramp signal reaches a preset RF energy, so that the signal acquisition module acquires the target test signal.

7. The testing device according to claim 1, characterized in that: The signal acquisition module includes: a first signal acquisition submodule, a second signal acquisition submodule, a third signal acquisition submodule and a fourth signal acquisition submodule; wherein, The first signal acquisition submodule is used to collect the RF ramp signal from the third signal generation submodule; the second signal acquisition submodule is used to collect the transponder feedback message signal from the signal transceiver module; the third signal acquisition submodule is used to collect the load module port signal from both ends of the load module; the fourth signal acquisition submodule is used to collect the C interface port signal of the transponder to be tested from the C interface end of the transponder to be tested.

8. The testing device according to claim 1, characterized in that: The host computer includes: a data processing module; the data processing module is used to: Acquire a load current signal according to the load module port signal; Filter the load current signal and the C-interface port signal of the transponder to be tested according to a preset filtering algorithm to obtain impedance modulus change information and activation state duration of the C-interface of the transponder to be tested, wherein the preset filtering algorithm includes: Butterworth low-pass filtering and smoothing filtering; Determine the activation response time and message continuity of the C interface of the transponder to be tested according to the radio frequency ramp signal and the transponder feedback message signal; The C4 signal test result of the transponder to be tested is determined based on the impedance modulus change information, the activation state duration, the activation response time, and the message continuity.

9. The testing device according to claim 8, characterized in that: The host computer includes: a display module; the display module is used to view the C4 signal test result of the transponder to be tested in real time.

10. A method for testing a transponder C4 signal, characterized in that: The method is applied to any one of the test devices in claims 1-9, and the method comprises: Generate a test signal based on the test requirements, the test signal includes: a coupled test signal and a radio frequency ramp signal, the coupled test signal is obtained by coupling the C1 signal and the C6 signal, and the test requirements include a test frequency requirement and a test amplitude requirement; The coupling signal is sent to the C interface of the transponder to be tested via the load module, and the radio frequency ramp signal is sent to the signal transceiver module after a preset time, so that the signal transceiver module sends the radio frequency ramp signal to the transponder to be tested and receives the transponder feedback message signal sent by the transponder to be tested; When the RF ramp signal reaches the preset RF energy, a target test signal is collected and sent to a host computer so that the host computer determines the test result of the C4 signal of the transponder to be tested based on the target test signal. The target test signal includes: the RF ramp signal, the transponder feedback message signal, the load module port signal, and the C interface port signal of the transponder to be tested.

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