Test device and method and electronic device

Abstract

The embodiment of the invention provides test equipment, a test method and electronic equipment, relates to the technical field of electromagnetism, and can reduce the EMC test cost. The test device comprises: an electromagnetic interference filtering module; the adapter power supply end is used for being electrically connected to the input end of a target adapter; the target noise separation module is electrically connected to the ground wire, and the target noise separation module is used for separating target noise in a target frequency range based on the live wire signal and the zero wire signal output by the electromagnetic interference filtering module and supplying power to the adapter power supply end; the input end of the simulation load is used for being electrically connected to the output end of a target adapter; the input end of the simulation load is electrically connected to a ground wire through the current loop device; and the measurement module is used for obtaining target noise source voltage and target noise source impedance according to the target noise separated by the target noise separation module.

Description

Technical Field

[0001] This application relates to the field of electromagnetic technologies, and particularly to a testing device, method, and electronic device. Background Art

[0002] To ensure product quality, electronic products need to undergo electromagnetic compatibility (EMC) testing when leaving the factory. For example, the conducted emission (CE) testing and radiated emission (RE) testing of power adapters of electronic products such as mobile phones during the charging state are important parts of EMC testing. As Figure 1 shown, conventional RE testing needs to be carried out based on a semi-anechoic chamber and a control room. The semi-anechoic chamber has a metal shielding outer wall, with anechoic materials laid on the inner surface, and a turntable, an experimental table, and an antenna lifting tower are set on the ground, and the rest of the ground is a metal reflecting surface. CE testing also requires constructing a reflecting ground and providing a certain degree of shielding environment. That is to say, EMC testing needs to be carried out in the corresponding testing scenarios, with relatively high costs. Summary of the Invention

[0003] In view of this, embodiments of this application provide a testing device, method, and electronic device, which can reduce the cost of EMC testing.

[0004] In a first aspect, embodiments of this application provide a testing device, including: an electromagnetic interference filtering module, which is electrically connected to the ground wire, and the electromagnetic interference filtering module is used to filter out interference noise based on the live wire signal and the neutral wire signal; an adapter power supply end, which is used to be electrically connected to the input end of the target adapter; a target noise separation module, which is electrically connected to the ground wire, and the target noise separation module is used to separate the target noise in the target frequency range based on the live wire signal and the neutral wire signal output by the electromagnetic interference filtering module and supply power to the adapter power supply end; a simulated load, the input end of the simulated load is used to be electrically connected to the output end of the target adapter; a current loop, the input end of the simulated load is electrically connected to the ground wire through the current loop; a measurement module, which is used to obtain the target noise source voltage and the target noise source impedance according to the target noise separated by the target noise separation module.

[0005] The electromagnetic interference filtering module can filter out interference noise to provide power supply without interference to the target adapter. The current loop can supply the target noise generated when the target adapter works to the target noise separation module. The target noise separation module separates the target noise, and the measurement module obtains the target noise source voltage and the target noise source impedance based on the target noise. The target noise source voltage and the target noise source impedance are the key measurement parameters for EMC testing, so as to facilitate the implementation of EMC testing in cooperation with other measurement parameters obtained by simulation. This testing method does not require building a test environment with high cost, that is, it can reduce the EMC testing cost. By using the testing method to obtain the target noise source voltage and the target noise source impedance, the equivalent EMC testing results can be obtained in cooperation with the results obtained by simulation. Compared with the testing based on a real anechoic chamber, the testing effect is improved. It does not require building or renting a laboratory site, does not require rotational scanning, and the test personnel do not need to enter and exit the EMC anechoic chamber to arrange the test system. The testing efficiency is high, and the size of the testing equipment is small. It adopts a non-shielded design and does not require building a shielding environment. It can be arranged in the adapter production line environment, which is convenient for placing the adapter for testing, that is, it improves the flexibility and portability of EMC testing.

[0006] In some possible embodiments, the electromagnetic interference filtering module includes: a first electromagnetic interference filter electrically connected to the ground wire, and the first electromagnetic interference filter is configured to filter out interference noise in a first frequency range based on the input live wire signal and neutral wire signal; a second electromagnetic interference filter configured to filter out interference noise in a second frequency range based on the input live wire signal and neutral wire signal, and the lowest value of the first frequency range is greater than or equal to the highest value of the second frequency range; the target noise separation module includes: a first line impedance stabilization network electrically connected to the ground wire, and the first line impedance stabilization network is configured to separate a first target noise and a second target noise based on the live wire signal and neutral wire signal output by the first electromagnetic interference filter, the first target noise is the live wire target noise in a third frequency range, the second target noise is the neutral wire target noise in the third frequency range, and the third frequency range belongs to the first frequency range; a second line impedance stabilization network electrically connected to the ground wire, and the second line impedance stabilization network is configured to separate a third target noise and a fourth target noise based on the live wire signal and neutral wire signal output by the second electromagnetic interference filter, the third target noise is the live wire target noise in a fourth frequency range, the fourth target noise is the neutral wire target noise in the fourth frequency range, and the fourth frequency range belongs to the second frequency range; the test device further includes: a bypass switch configured to switch between a first state and a second state; in the first state, the bypass switch is configured to conduct between the power supply output terminal of the first line impedance stabilization network and the adapter power supply terminal, and cut off between the power supply output terminal of the second line impedance stabilization network and the adapter power supply terminal, and the power supply output terminal is configured to output the live wire signal and the neutral wire signal; in the second state, the bypass switch is configured to conduct between the power supply output terminal of the second line impedance stabilization network and the adapter power supply terminal, and cut off between the power supply output terminal of the first line impedance stabilization network and the adapter power supply terminal; the measurement module includes: a spectrum analyzer configured to measure the target noise source voltage; a vector network analyzer configured to measure the target noise source impedance; a multiplexer, and the multiplexer is configured to time-divisionally transmit the first target noise and the second target noise to the spectrum analyzer and the vector network analyzer in the first state, and the multiplexer is further configured to time-divisionally transmit the third target noise and the fourth target noise to the spectrum analyzer and the vector network analyzer in the second state.

[0007] The EMC test of the power adapter can be divided into two parts according to the test frequency ranges of RE and CE. The test frequency range of CE is [150KHz, 30MHz], and the test frequency range of RE is [30MHz, 1000MHz]. In fact, the risk frequency points of RE caused by the power adapter noise are distributed in [30MHz, 300MHz]. Therefore, the target noise source voltage and the target noise source impedance in the frequency range of [150KHz, 30MHz] can be obtained by the test device in the embodiments of the present application, so as to facilitate the implementation of the RE test; in addition, the target noise source voltage and the target noise source impedance in the frequency range of [30MHz, 300MHz] can be obtained by the test device in the embodiments of the present application, so as to facilitate the implementation of the CE test.

[0008] In some possible implementation manners, the test device further includes: a voltage regulator, which is configured to regulate the voltage based on the input live wire signal and neutral wire signal, and output the regulated live wire signal and neutral wire signal to the first electromagnetic interference filter; the second electromagnetic interference filter is specifically configured to filter out the interference noise in the second frequency range based on the live wire signal and neutral wire signal output by the first electromagnetic interference filter; both the first frequency range and the third frequency range are [30MHz, 300MHz], and both the second frequency range and the fourth frequency range are [150KHz, 30MHz]. The voltage regulator can be used to adjust the mains voltage from the outside and display the output voltage, and can switch the power supply standards such as CE / CCC / FCC.

[0009] In some possible implementation manners, the test device further includes: a socket panel, on which a plug-in part for connecting the input end of the target adapter is provided, and an adapter power supply end is provided on the plug-in part; a crown spring contact provided around the socket panel, the crown spring contact is electrically connected to the ground wire, and the crown spring contact is provided with a spring contact hole; the current loop device includes: a lifting platform located above the socket panel, a USB male head is provided at the bottom of the lifting platform, the USB male head is electrically connected to a charging wire, and the charging wire is electrically connected to an analog load; a metal column is fixedly provided on the lifting platform, the current loop device includes a first current loop capacitor and a second current loop capacitor, a first end of the first current loop capacitor is electrically connected to the power supply end of the USB male head, a second end of the first current loop capacitor is electrically connected to the metal column, a first end of the second current loop capacitor is electrically connected to the ground end of the USB male head, and a second end of the second current loop capacitor is electrically connected to the metal column; the metal column is inserted into the spring contact hole of the crown spring contact; the test device further includes: a lifting device, which is configured to drive the lifting platform to perform a lifting function relative to the socket panel.

[0010] Since the input end of the analog load is electrically connected to the power supply terminal VBUS and the ground terminal VGND of the USB male connector, and the power supply terminal VBUS and the ground terminal VGND of the USB male connector are electrically connected to the metal post through the first current loop capacitor and the second current loop capacitor respectively, and the metal post is electrically connected to the ground wire through the crown spring piece, even if the input end of the analog load is electrically connected to the ground wire G through the USB male connector, the first current loop capacitor, the second current loop capacitor, the metal post and the crown spring piece, so as to realize a compact and short-path noise current loop and reduce the influence of the loop inductance on the high-frequency current test effect. After the USB male connector is plugged into the target adapter, the target adapter can be made to work for testing to obtain the target noise source voltage and the target noise source impedance. After the test of the current target adapter is completed, the lifting platform can be controlled to rise by the lifting device, so that the USB male connector is pulled out from the output end of the target adapter, and then the target adapter can be removed from the socket panel, and the next target adapter to be tested can be replaced. The replaced target adapter is plugged into the socket panel, and the test process is repeated to realize the test of the replaced target adapter. It can be seen that through the cooperation of the lifting platform and the lifting device, the batch testing of adapters can be realized more conveniently.

[0011] In some possible implementation manners, the testing device further includes: a first circuit board detachably connected to the lifting platform, the USB male connector is fixed on the first circuit board, the lifting platform is a metal lifting platform, and the second ends of the first current loop capacitor and the second current loop capacitor are electrically connected to the lifting platform through the grounding portion on the first circuit board, and the lifting platform is connected to the metal post; a second circuit board disposed on the lifting platform, a USB female socket is disposed on the second circuit board, and the USB female socket is electrically connected to the charging wire; a connector, and the first circuit board and the second circuit board are electrically connected through the connector. When testing different target adapters, by detaching the first circuit board on the lifting platform, the position of the USB communication can be conveniently changed to match the target adapter.

[0012] In some possible embodiments, the test device further includes: a third circuit board, on which a bypasser, a first line impedance stabilization network, and a second line impedance stabilization network are disposed; a fourth circuit board, on which a multiplexer, a first electromagnetic interference filter, and a second electromagnetic interference filter are disposed; a controller disposed on the fourth circuit board, the controller being configured to control the multiplexer and the lifting device; a metal shielding cover, a receiving space formed by the metal shielding cover and the third circuit board, and the bypasser, the first line impedance stabilization network, and the second line impedance stabilization network are located in the receiving space. The metal shielding cover can reduce the interference received by the first line impedance stabilization network and the second line impedance stabilization network, so that the first line impedance stabilization network and the second line impedance stabilization network output relatively pure power signals to be provided to the target adapter for testing. In addition, in cooperation with the third circuit board and the fourth circuit board, a local part that takes into account both space occupation and cost can be provided.

[0013] In some possible embodiments, the first line impedance stabilization network includes: a first neutral line input end and a first neutral line output end; a first neutral line inductor electrically connected between the first neutral line input end and the first neutral line output end, the first neutral line inductor being a hollow coil inductor, the side of the first neutral line inductor close to the first neutral line input end being a first cylindrical coil, the side of the first neutral line inductor close to the first neutral line output end being a first tapered transition coil, and the tapered end of the first tapered transition coil being electrically connected to the first neutral line output end; a first live line input end and a first live line output end, the first neutral line output end and the first live line output end being the power supply output ends of the first line impedance stabilization network; a first live line inductor electrically connected between the first live line input end and the first live line output end, the first live line inductor being a hollow coil inductor, the side of the first live line inductor close to the first live line input end being a second cylindrical coil, the side of the first live line inductor close to the first live line output end being a second tapered transition coil, and the tapered end of the second tapered transition coil being electrically connected to the first live line output end. The tapered transition structure of the inductor is used to reduce the influence of the inductor parasitic parameters on the high-frequency band, and to achieve the operating frequency range of the first line impedance stabilization network in [30 MHz, 300 MHz].

[0014] In some possible embodiments, the first line impedance stabilization network further includes: a first magnetic rod at least partially inserted into the first cylindrical coil, wherein the insertion depth of the first magnetic rod into the first cylindrical coil is adjustable; the first neutral input terminal is electrically connected to the ground wire through a first capacitor; the first neutral output terminal is electrically connected to the first neutral noise terminal through a second capacitor; the first neutral noise terminal is electrically connected to the ground wire through a first resistor, and the first neutral noise terminal is electrically connected to the multiplexer through a corresponding first neutral noise radio frequency port; a second magnetic rod at least partially inserted into the second cylindrical coil, wherein the insertion depth of the second magnetic rod into the second cylindrical coil is adjustable; the first live input terminal is electrically connected to the ground wire through a third capacitor; the first live output terminal is electrically connected to the first live noise terminal through a fourth capacitor; the first live noise terminal is electrically connected to the ground wire through a second resistor, and the first live noise terminal is electrically connected to the multiplexer through a corresponding first live noise radio frequency port. The magnetic rod inserted into the inductor coil is used to increase the inductance value of the inductor in the low frequency band, which is beneficial to avoiding the input impedance of the target noise signal due to too small inductance value, and the insertion depth is adjustable, so that it can be adjusted to the optimal matching position before testing to improve the test reliability.

[0015] In some possible embodiments, the power supply output terminals of the second line impedance stabilization network include a second neutral output terminal and a second live output terminal; the bypass includes a first bypass unit and a second bypass unit, and the adapter power supply terminal includes a neutral power supply terminal and a live power supply terminal; the first input terminal of the first bypass unit is electrically connected to the first neutral output terminal, the second input terminal of the first bypass unit is electrically connected to the second neutral output terminal, and the output terminal of the first bypass unit is electrically connected to the neutral power supply terminal; the first input terminal of the second bypass unit is electrically connected to the first live output terminal, the second terminal of the second bypass unit is electrically connected to the second live output terminal, and the output terminal of the second bypass unit is electrically connected to the live power supply terminal; in the first state, the first input terminal and the output terminal of the first bypass unit are conducting, the second input terminal and the output terminal of the first bypass unit are cut off, the first input terminal and the output terminal of the second bypass unit are conducting, and the second input terminal and the output terminal of the second bypass unit are cut off; in the second state, the first input terminal and the output terminal of the first bypass unit are cut off, the second input terminal and the output terminal of the first bypass unit are conducting, the first input terminal and the output terminal of the second bypass unit are cut off, and the second input terminal and the output terminal of the second bypass unit are conducting.

[0016] In some possible embodiments, the second line impedance stabilization network includes: a second neutral input terminal; a second neutral inductor electrically connected between the second neutral input terminal and the second neutral output terminal, the second neutral inductor being an air-core coil inductor and the second neutral inductor being a cylindrical coil; a third magnetic rod at least partially inserted into the second neutral inductor, the depth of insertion of the third magnetic rod into the second neutral inductor being adjustable; the second neutral input terminal being electrically connected to the ground wire through a fifth capacitor; the second neutral output terminal being electrically connected to a second neutral noise terminal through a sixth capacitor; the second neutral noise terminal being electrically connected to the ground wire through a third resistor, and the second neutral noise terminal being electrically connected to a multiplexer through a corresponding second neutral noise RF port; a second live input terminal; a second live inductor electrically connected between the second live input terminal and the second live output terminal, the second live inductor being an air-core coil inductor and the second live inductor being a cylindrical coil; a fourth magnetic rod at least partially inserted into the second live inductor, the depth of insertion of the fourth magnetic rod into the second live inductor being adjustable; the second live input terminal being electrically connected to the ground wire through a seventh capacitor; the second live output terminal being electrically connected to a second live noise terminal through an eighth capacitor; the second live noise terminal being electrically connected to the ground wire through a fourth resistor, and the second live noise terminal being electrically connected to a multiplexer through a corresponding second live noise RF port.

[0017] In a second aspect, an electromagnetic compatibility testing method provided by an embodiment of the present application includes: obtaining a target noise source voltage and a target noise source impedance through testing by the above-mentioned testing device; obtaining a cable radiation test result through cable radiation model simulation; obtaining an environment test result through environment model simulation; and obtaining an electromagnetic compatibility test result based on the target noise source voltage, the target noise source impedance, the cable radiation test result, and the environment test result.

[0018] In a third aspect, an electronic device provided by an embodiment of the present application includes: a processor and a memory, the memory being used to store at least one instruction, and when the instruction is loaded and executed by the processor, the electronic device executes the above-mentioned electromagnetic compatibility testing method.

[0019] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, the computer-readable storage medium including a stored program, wherein when the program is executed by a processor, the electromagnetic compatibility testing method as described in the above embodiment is implemented.

[0020] In a fifth aspect, an embodiment of the present application further provides a computer program product, the program product including a program, and when the program is run by an electronic device, the electronic device is caused to implement the electromagnetic compatibility testing method as described in the above embodiment.

[0021] In a sixth aspect, an embodiment of the present application further provides a chip system, including: a communication interface for inputting and / or outputting data; a processor for executing a computer-executable program, such that a device installed with the chip system executes the electromagnetic compatibility test method as described in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic diagram of an EMC anechoic chamber environment in the prior art;

[0024] Figure 2 It is a schematic diagram of an EMC test principle in an embodiment of the present application;

[0025] Figure 3 For Figure 2 It is a corresponding schematic diagram of three models and the EMC anechoic chamber environment;

[0026] Figure 4 It is a structural block diagram of a test device in an embodiment of the present application;

[0027] Figure 5 It is a structural schematic diagram of a test device in an embodiment of the present application;

[0028] Figure 6 For Figure 5 It is a top view of a partial structure in

[0029] Figure 7 It is a structural schematic diagram of a first line impedance stabilization network in an embodiment of the present application;

[0030] Figure 8 It is a structural schematic diagram of a second line impedance stabilization network in an embodiment of the present application;

[0031] Figure 9 It is a flowchart of an electromagnetic compatibility test method in an embodiment of the present application;

[0032] Figure 10 It is a structural block diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0034] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope protected by this application.

[0035] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms "a", "the", and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0036] It should be understood that the term "and / or" used herein is only a relational expression describing associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally indicates an "or" relationship between the associated objects before and after.

[0037] In the embodiments of this application, according to the principle of EMC testing, the radiation process of the power adapter can be divided into 3 models, as Figure 2 and Figure 3 shown, including the power adapter model, the cable radiation model, and the test environment model. Taking the RE test of the power adapter of a mobile phone as an example, the influencing factors of the power adapter model include the target noise source voltage and the target noise source impedance. Among them, Us(f) represents the magnitude of the noise source voltage at each frequency, and Zs(f) represents the impedance of the noise source at each frequency, which is composed of the real part impedance Rs(f) and the imaginary part impedance jXs(f). The radiators involved in the cable radiation model can include all possible radiators such as data lines, mobile phones, plug boards, power cords, etc., and the influencing factors include the cable and the placement method of the mobile phone. The cable radiation model can be expressed by the ABCD matrix model, which can carry the input impedance of the cable radiation and the maximum gain in a certain direction. The reason for adopting the ABCD matrix is that it can facilitate cascaded operations with other models at the subsequent stage. The test environment model can be the semi-anechoic chamber propagation model, which is determined by the chamber environment. In the RE test, the ground reflection path and the direct path are superimposed at the test antenna, further weighting the noise spectrum. After cascading the above three models, the test results equivalent to the RE test can be obtained according to the test results of the three. Among them, for the cable radiation model and the test environment model, the corresponding test results can be obtained based on electromagnetic simulation, while for the power adapter model, the target noise including the target noise source voltage and the target noise source impedance can be obtained based on the actual test of the power adapter.

[0038] As Figure 4As shown in the figure, an embodiment of the present application provides a test device for testing a power adapter to obtain target noise, that is, to obtain the target noise source voltage and the target noise source impedance. The test device includes: an electromagnetic interference (EMI) filtering module 1, which is electrically connected to the ground wire G. The EMI filtering module 1 is used to filter out interference noise based on the live wire N signal and the neutral wire L signal. It should be noted that the interference noise here is different from the previous target noise. The interference noise refers to external interference signals from the power supply signal input to the EMI filtering module 1, while the target noise refers to the noise of the target adapter to be tested, which comes from the subsequent target adapter. The EMI filtering module 1 is used to filter out the external interference noise therein while supplying external power to other test devices, so as to reduce the adverse impact of external interference noise on the test. The test device also includes an adapter power supply terminal 2, which is used to be electrically connected to the input end of the target adapter 3, that is, the adapter power supply terminal 2 is used to supply power to the target adapter 3. A target noise separation module 4, which is electrically connected to the ground wire G. The target noise separation module 4 is used to separate the target noise in the target frequency range based on the live wire N signal and the neutral wire L signal output by the EMI filtering module 1 and supply power to the adapter power supply terminal 2. The target noise refers to the noise of the target adapter 3. The noise of the target adapter 3 will flow back to the target noise separation module 4 through the current loop of the ground wire G, so that the target noise separation module 4 can separate the target noise of the target adapter 3. On the other hand, the target noise separation module 4 is also used to supply power to the adapter power supply terminal 2 based on the neutral wire N signal and the live wire L signal output by the EMI filtering module 1, so that the power input signal of the target adapter 3 is the signal after filtering out the external interference noise. The test device also includes a simulated load 5. The input end of the simulated load 5 is used to be electrically connected to the output end of the target adapter 3. The simulated load 5 is, for example, a programmable fast charging protocol electronic load, that is, it can simulate different specifications and different protocol loads based on control, so that the target adapter 3 operates in the mode to be tested. The target adapter 3 is used to convert the input alternating current into direct current and output the converted direct current to the simulated load 5. The test device also includes a current loop device 6. The input end of the simulated load 5 is electrically connected to the ground wire G through the current loop device 6. The current loop device 6 is used to provide a target noise current loop on the ground wire G, so that when the target adapter 3 is working, the generated target noise can be separated by the target noise separation module 4 through the loop of the ground wire G. The test device also includes a measurement module 7, which is used to obtain the target noise source voltage and the target noise source impedance according to the target noise separated by the target noise separation module 4.

[0039] In the test equipment according to the embodiments of the present application, the electromagnetic interference filtering module can filter out interference noise to provide power supply after removing interference to the target adapter. The current loop device can provide the target noise generated when the target adapter works to the target noise separation module. The target noise separation module separates the target noise, and the measurement module obtains the target noise source voltage and the target noise source impedance based on the target noise. The target noise source voltage and the target noise source impedance are the key measurement parameters for EMC testing, so as to cooperate with other measurement parameters obtained by simulation to achieve EMC testing. This testing method does not require building a test environment with high cost, that is, it can reduce the EMC testing cost. By using the testing method to obtain the target noise source voltage and the target noise source impedance, the equivalent EMC testing results can be obtained in cooperation with the results obtained by simulation. Compared with the testing based on a real anechoic chamber, the testing effect is improved. It does not require building or renting a laboratory site, does not require rotational scanning, and the testers do not need to enter and exit the EMC anechoic chamber to arrange the test system. The testing efficiency is high, and the size of the test equipment is small. It adopts a non-shielded design and does not require building a shielding environment. It can be arranged in the adapter production line environment, which is convenient for placing the adapter to be tested, that is, it improves the flexibility and portability of EMC testing.

[0040] In some embodiments, the electromagnetic interference filtering module 1 includes: a first electromagnetic interference filter 11, the first electromagnetic interference filter 11 is electrically connected to the ground wire G, and the first electromagnetic interference filter 11 is used to filter out interference noise in the first frequency range [30 MHz, 300 MHz] based on the input live wire N signal and neutral wire L signal. It should be noted that [30 MHz, 300 MHz] is only a specific example of the first frequency range; a second electromagnetic interference filter 12, the second electromagnetic interference filter 12 is used to filter out interference noise in the second frequency range [150 KHz, 30 MHz] based on the input live wire N signal and neutral wire L signal. It should be noted that [150 KHz, 30 MHz] is only a specific example of the second frequency range, and the minimum value of the first frequency range is greater than or equal to the maximum value of the second frequency range. In Figure 4In the structure shown, the live wire N signal and the neutral wire L signal input to the second electromagnetic interference filter 12 are from the output of the first electromagnetic interference filter 11. Understandably, in other possible embodiments, the live wire N signal and the neutral wire L signal input to the second electromagnetic interference filter 12 can also be provided by other devices. The first electromagnetic interference filter 11 and the second electromagnetic interference filter 12 are used to filter out the interference noise of the input signal in different frequency ranges to cooperate with the target noise separation module 4 to obtain the target noise in different frequency ranges. The target noise separation module 4 includes: a first line impedance stabilization network (Line Impedance Stabilization Network, LISN) 41, the first line impedance stabilization network 41 is electrically connected to the ground wire G, and the first line impedance stabilization network 41 is used to separate the first target noise and the second target noise based on the live wire N signal and the neutral wire L signal output by the first electromagnetic interference filter 11. The first target noise is the live wire N target noise in the third frequency range [30 MHz, 300 MHz], and the second target noise is the neutral wire L target noise in the third frequency range [30 MHz, 300 MHz]. It should be noted that [30 MHz, 300 MHz] is only a specific example of the third frequency range, and the third frequency range belongs to the first frequency range. In a specific example, the first frequency range is equal to the third frequency range; a second line impedance stabilization network 42, the second line impedance stabilization network 42 is electrically connected to the ground wire G, and the second line impedance stabilization network 42 is used to separate the third target noise and the fourth target noise based on the live wire N signal and the neutral wire L signal output by the second electromagnetic interference filter 12. The third target noise is the live wire N target noise in the fourth frequency range [150 KHz, 30 MHz], and the fourth target noise is the neutral wire L target noise in the fourth frequency range [150 KHz, 30 MHz]. It should be noted that [150 KHz, 30 MHz] is only a specific example of the fourth frequency range, and the fourth frequency range belongs to the second frequency range. In a specific example, the fourth frequency range is equal to the second frequency range. The test device further includes: a bypass 8, and the bypass 8 is used to switch between a first state and a second state; in the first state, the bypass 8 is used to conduct between the power supply output terminal of the first line impedance stabilization network 41 and the adapter power supply terminal 2, and cut off between the power supply output terminal of the second line impedance stabilization network 42 and the adapter power supply terminal 2. The power supply output terminal is used to output the live wire N signal and the neutral wire L signal; in the second state, the bypass 8 is used to conduct between the power supply output terminal of the second line impedance stabilization network 42 and the adapter power supply terminal 2, and cut off between the power supply output terminal of the first line impedance stabilization network 41 and the adapter power supply terminal 2.That is to say, the bypasser 8 is used to bypass one of the first line impedance stabilization network 41 and the second line impedance stabilization network 42 during the test using one of them. For example, a 50Ω dummy load is provided for it to avoid the test errors caused by the inductive series and capacitive parallel in the other one. The measurement module 7 includes: a spectrum analyzer 71 for measuring the target noise source voltage; a vector network analyzer 72 for measuring the target noise source impedance; a multiplexer 73. The multiplexer 73 is used to time-division transmit the first target noise and the second target noise to the spectrum analyzer 71 and the vector network analyzer 72 in the first state. The multiplexer 73 is also used to time-division transmit the third target noise and the fourth target noise to the spectrum analyzer 71 and the vector network analyzer 72 in the second state. The multiplexer 73 can be implemented by a high-frequency relay to switch between states. The ports of the bypasser 8 connected to the spectrum analyzer 71 and the vector network analyzer 72 can be provided with radio frequency limiters.

[0041] Specifically, the first electromagnetic interference filter 11 and the second electromagnetic interference filter 12 may include a multi-stage differential mode filter and a common mode filter. The first electromagnetic interference filter 11 and the second electromagnetic interference filter 12 are respectively used to filter out external interference signals in different frequency ranges, so as to avoid the adverse effects of external interference signals on the test results. The target adapter 3 operates in different time periods to implement tests of different parameters. For example, when the bypass 8 operates in the first state, the first line impedance stabilization network 41 provides the live wire N signal and the neutral wire L signal after filtering out interference noise in the frequency range of [30 MHz, 300 MHz] to the target adapter 3, and separates the live wire N target noise and the neutral wire L target noise in the frequency range of [30 MHz, 300 MHz], outputs the live wire N target noise and the neutral wire L target noise to the spectrum analyzer 71 at different times, and outputs the live wire N target noise and the neutral wire L target noise to the vector network analyzer 72 at different times. The target noise source voltage of the live wire N and the neutral wire L in the frequency range of [30 MHz, 300 MHz] is obtained through the spectrum analyzer 71, and the target noise source impedance of the live wire N and the neutral wire L in the frequency range of [30 MHz, 300 MHz] is obtained through the vector network analyzer 72; when the bypass 8 operates in the second state, the second line impedance stabilization network 42 provides the live wire N signal and the neutral wire L signal after filtering out interference noise in the frequency range of [150 KHz, 30 MHz] to the target adapter 3, separates the live wire N target noise and the neutral wire L target noise in the frequency range of [150 KHz, 30 MHz] respectively, outputs the live wire N target noise and the neutral wire L target noise to the spectrum analyzer 71 at different times, and outputs the live wire N target noise and the neutral wire L target noise to the vector network analyzer 72 at different times. The target noise source voltage of the live wire N and the neutral wire L in the frequency range of [150 KHz, 30 MHz] is obtained through the spectrum analyzer 71, and the target noise source impedance of the live wire N and the neutral wire L in the frequency range of [150 KHz, 30 MHz] is obtained through the vector network analyzer 72.

[0042] The EMC test of the power adapter can be divided into two parts according to the test frequency ranges of RE and CE. The test frequency range of CE is [150 KHz, 30 MHz], and the test frequency range of RE is [30 MHz, 1000 MHz]. In fact, the RE risk frequency points caused by the power adapter noise are distributed in [30 MHz, 300 MHz]. Therefore, the target noise source voltage and the target noise source impedance in the frequency range of [150 KHz, 30 MHz] can be obtained through the test equipment in the embodiments of the present application to facilitate the implementation of the RE test; in addition, the target noise source voltage and the target noise source impedance in the frequency range of [30 MHz, 300 MHz] can be obtained through the test equipment in the embodiments of the present application to facilitate the implementation of the CE test.

[0043] In some embodiments, the test device further includes: a voltage regulator 9 configured to regulate the voltage based on the input live wire N signal and neutral wire L signal, and output the regulated live wire N signal and neutral wire L signal to the first electromagnetic interference filter 11; the second electromagnetic interference filter 12 is specifically configured to filter out the interference noise in the second frequency range based on the live wire N signal and neutral wire L signal output by the first electromagnetic interference filter 11. The first frequency range and the third frequency range are both [30 MHz, 300 MHz], and the second frequency range and the fourth frequency range are both [150 KHz, 30 MHz].

[0044] Specifically, the voltage regulator 9 can specifically be a digital display single-phase voltage regulator with an autotransformer structure, which can be used to adjust the external mains voltage and display the output voltage, and can switch power supply standards such as CE / CCC / FCC.

[0045] In some embodiments, as Figure 4 and Figure 5 shown, the test device further includes: a socket panel 100, on which a plug-in part for connecting the input end of the target adapter 3 is provided, and the above-mentioned adapter power supply terminal 2 is provided on the plug-in part ( Figure 5 not shown in ); the crown spring contacts 200 arranged around the socket panel 100 are electrically connected to the ground wire G ( Figure 5 not shown in ), and the crown spring contacts 200 are provided with spring holes; the current loop device 6 includes: a lifting platform 300 located above the socket panel 100, a USB male head 301 is provided at the bottom of the lifting platform 300, the USB male head 301 is electrically connected to a charging cable 302, and the charging cable 302 is electrically connected to an analog load 5 ( Figure 5 not shown in ). A metal column 303 is fixedly provided on the lifting platform 300, and the current loop device 6 includes a first current loop capacitor C61 ( Figure 5 not shown in ) and a second current loop capacitor C62 ( Figure 5(not shown in the figure), the first end of the first current loop capacitor C61 is electrically connected to the power supply terminal VBUS of the USB male connector 301, the second end of the first current loop capacitor C61 is electrically connected to the metal post 303, the first end of the second current loop capacitor C62 is electrically connected to the ground terminal VGND of the USB male connector 301, the second end of the second current loop capacitor C62 is electrically connected to the metal post 303, and the metal post 303 is electrically connected to the ground wire G. The input of the target adapter 3 is an AC signal, and the output is a DC signal. The target adapter 3 outputs a DC signal through the power supply terminal VBUS and the ground terminal VGND. The metal post 303 is inserted into the spring hole of the crown spring piece 200. During the process of the lifting table 300 lifting and lowering relative to the socket panel 100, the metal post 303 can maintain good contact with the crown spring piece 200, so that the power supply terminal VBUS and the ground terminal VGND on one side of the lifting table 300 are electrically connected to the ground wire G on one side of the socket panel 100 through the first current loop capacitor C61 and the second current loop capacitor C62. As Figure 5 and Figure 6 shown, the test device further includes: a lifting device 400, and the lifting device 400 is used to drive the lifting table 300 to perform a lifting function relative to the socket panel 100. The lifting device 400 may include, for example, a stepping motor 401, a screw 402, a bolt 403, and a fixing bracket 404. There may be multiple sets of the stepping motor 401, the screw 402, the bolt 403, and the fixing bracket 404. For example Figure 6In the four groups shown, the fixing brackets 404 are fixedly connected to the connecting bolts 403 and the lifting platform 300. A plurality of fixing brackets 404 can be evenly distributed around the lifting platform 300 to achieve stable support for the lifting platform 300. The screw rod 402 is threadedly connected to the bolt 403. The bottom of the screw rod 402 is connected to the stepping motor 401. The stepping motor 401 is used to control the rotation of the screw rod 402. Through the rotation of the screw rod 402, in cooperation with the bolt 403 and the fixing brackets 404, the lifting function of the lifting platform 300 can be achieved. Through the lifting function of the lifting platform 300, the batch testing of the target adapter 3 can be realized more efficiently. In the state where the lifting platform 300 is raised, the target adapter 3 to be tested is plugged into the socket panel 100, so that the input end of the target adapter 3 is electrically connected to the adapter power supply end 2 on the socket panel 100. Then, the lifting device 400 is used to control the lowering of the lifting platform 300, so that the USB male head 301 at the bottom of the lifting platform 300 is plugged into the output end of the target adapter 3. The output end of the target adapter 3 can be electrically connected to the analog load 5 through the USB male head 301 and the charging cable 302. Moreover, since the input end of the analog load 5 is electrically connected to the power supply terminal VBUS and the ground terminal VGND of the USB male head 301, and the power supply terminal VBUS and the ground terminal VGND of the USB male head 301 are respectively electrically connected to the metal post 303 through the first current loop capacitor C61 and the second current loop capacitor C62, and the metal post 303 is electrically connected to the ground wire G through the crown spring piece 200, even the input end of the analog load 5 is electrically connected to the ground wire G through the USB male head 301, the first current loop capacitor C61, the second current loop capacitor C62, the metal post 303 and the crown spring piece 200 to achieve a compact and short-path noise current loop, and reduce the influence of the loop inductive reactance on the high-frequency current test effect. After the USB male head 301 is plugged into the target adapter 3, the target adapter 3 can be made to work for testing to obtain the target noise source voltage and the target noise source impedance. After the testing of the current target adapter 3 is completed, the lifting device 400 can be used to control the lifting of the lifting platform 300, that is, to pull out the USB male head 301 from the output end of the target adapter 3. Then, the target adapter 3 can be removed from the socket panel 100, and the next target adapter 3 to be tested is replaced. The replaced target adapter 3 is plugged into the socket panel 100, and the above process is repeated to realize the testing of the replaced target adapter 3. It can be seen that through the cooperation of the lifting platform 200 and the lifting device 400, the batch testing of the adapter 3 can be realized more conveniently.

[0046] In some embodiments, the test device further includes: a first circuit board 311, on which a USB male connector 301 is fixed, for example, the USB male connector 301 is soldered to the first circuit board 311, and the first circuit board 311 is detachably connected to the lifting platform 300. For example, the first circuit board 311 can be fixed to the lifting platform 300 by screws. After the lifting platform 300 descends, the output end of the target adapter 3 is plugged into the USB male connector 301 through a SUB female socket. Since the positions of the USB female sockets at the output ends of different target adapters 3 may be different, a first circuit board 311 corresponding to the target adapter 3 can be set so that the positions of the USB male connectors 301 on different first circuit boards 311 match the positions of the USB female sockets on the corresponding target adapters 3. When testing different target adapters 3, by removing the first circuit board 311 on the lifting platform 300, the position of the USB male connector 301 can be conveniently changed to match the target adapter 3. The lifting platform 300 is a metal lifting platform, and the second ends of the first current loop capacitor C61 and the second current loop capacitor C62 are electrically connected to the lifting platform 300 through a grounding portion on the first circuit board 311. The lifting platform 300 is connected to a metal column 300, and by using the metal lifting platform 300 as a part of the current loop, the stability of the current loop can be improved. The test device further includes a second circuit board 312 provided on the lifting platform 300. A USB female socket 321 is provided on the second circuit board 312, and the USB female socket 321 is electrically connected to a charging cable 302. The test device further includes a connector 322. The first circuit board 311 and the second circuit board 312 are electrically connected through the connector 322. The connector 322 can specifically be a Board to Board (BTB) connector, which facilitates the connection of the second circuit board 312 to the replaced first circuit board 311 through the connector 322 when the first circuit board 311 is replaced.

[0047] In some embodiments, the test device further includes: a third circuit board 313, on which a bypasser 8, a first line impedance stabilization network 41, and a second line impedance stabilization network 42 are disposed; a fourth circuit board 314, on which a multiplexer 73, a first electromagnetic interference filter 11, and a second electromagnetic interference filter 12 are disposed; a controller 500 disposed on the fourth circuit board 314, the controller 500 being configured to control the multiplexer 500 and the lifting device 400. Additionally, the controller 500 can also be used to control the bypasser 8. The controller 500 can independently control the above-mentioned devices, for example, execute corresponding control instructions according to a preset process to implement the test process. The controller 500 can also respond to external operations to control the above-mentioned devices. For example, the controller 500 can be communicatively connected to an external host computer 74 in a wired or wireless manner. The host computer 74 sends control instructions to the controller 500, and the controller 500 controls the above-mentioned devices based on the control instructions to perform the test. The test device further includes a metal shielding cover 600. The accommodation space formed by the metal shielding cover 600 and the third circuit board 313 houses the bypasser 8, the first line impedance stabilization network 41, and the second line impedance stabilization network 42. The interference received by the first line impedance stabilization network 41 and the second line impedance stabilization network 42 is reduced, so that the first line impedance stabilization network 41 and the second line impedance stabilization network 42 output relatively pure power supply signals for testing the target adapter 3. Additionally, the target noise signals separated by the first line impedance stabilization network 41 and the second line impedance stabilization network 42 can be transmitted through a radio frequency cable to the multiplexer 73 on the fourth circuit board 314. The output end of the multiplexer 73 is connected to a radio frequency port 700, and the radio frequency port 700 includes a live wire N radio frequency port 701 and a neutral wire L radio frequency port 702. The socket panel 100, the third circuit board 313, and the fourth circuit board 314 can be disposed in a chassis 800. The third circuit board 313 and the fourth circuit board 314 can be fixed to the inner wall of the chassis 800 by a plurality of fixing screws. The radio frequency port 700 is disposed on the chassis 800 and is connected to a spectrum analyzer 71 ( Figure 5 not shown in the figure) and a vector network analyzer 72 ( Figure 5 not shown in the figure) outside the chassis 800. The multiplexer 73 is configured to transmit the target noise output by the first line impedance stabilization network 41 to the spectrum analyzer 71 and the vector network analyzer 72 through the radio frequency port 700 in a first state. The multiplexer 73 is further configured to switch to transmit the target noise output by the second line impedance stabilization network 42 to the spectrum analyzer 71 and the vector network analyzer 72 through the radio frequency port 700 in a second state. In Figure 5 this context, the ground wire G can be understood as the grounding line on the third circuit board 313 or the fourth circuit board 314.

[0048] In some embodiments, such asFigure 7 As shown, the first line impedance stabilization network 41 includes: a first neutral input terminal Lin1 and a first neutral output terminal Lout1. The first neutral input terminal Lin1 is electrically connected to the first electromagnetic interference filter 11, and the first neutral output terminal Lout1 is electrically connected to the socket panel 100; a first neutral inductor LL1 electrically connected between the first neutral input terminal Lin1 and the first neutral output terminal Lout1. The first neutral inductor LL1 is an air-core coil inductor, and the inductance value of the first neutral inductor LL1 is, for example, 5 μH. The side of the first neutral inductor LL1 close to the first neutral input terminal Lin1 is a first cylindrical coil, and the side of the first neutral inductor LL1 close to the first neutral output terminal Lout1 is a first tapered transition coil. The tapered end of the first tapered transition coil is electrically connected to the first neutral output terminal Lout1; a first live input terminal Nin1 and a first live output terminal Nout1. The first live input terminal Nin1 is electrically connected to the first electromagnetic interference filter 11, and the first live output terminal Nout1 is electrically connected to the socket panel 100. The first neutral output terminal Lout1 and the first live output terminal Nout1 are the power supply output terminals of the first line impedance stabilization network 41; a first live inductor NL1 electrically connected between the first live input terminal Nin1 and the first live output terminal Nout1. The first live inductor NL1 is an air-core coil inductor. The side of the first live inductor NL1 close to the first live input terminal Nin1 is a second cylindrical coil, and the side of the first live inductor NL1 close to the first live output terminal Nout1 is a second tapered transition coil. The tapered end of the second tapered transition coil is electrically connected to the first live output terminal Nout1. The tapered transition structure of the inductor is used to reduce the influence of the inductor parasitic parameters on the high-frequency band, and to achieve the operating frequency range of the first line impedance stabilization network 41 in [30 MHz, 300 MHz].

[0049] In some embodiments, the first line impedance stabilization network 41 further includes: a first magnetic rod M1 at least partially inserted into the first cylindrical coil. The insertion depth of the first magnetic rod M1 into the first cylindrical coil is adjustable, and the first magnetic rod M1 is inserted from the end of the first cylindrical coil far from the first tapered transition coil; the first neutral input terminal Lin1 is electrically connected to the ground wire G through a first capacitor C1. The first capacitor C is, for example, a 4.7 nF, 630 V 1812 ceramic capacitor, Figure 7 where the left end of the ground wire G in it is the ground wire input terminal of the first line impedance stabilization network 41 and is electrically connected to the first electromagnetic interference filter 11, Figure 7The right end of the neutral ground wire G is the ground wire output end of the first line impedance stabilization network 41, which is electrically connected to the socket panel 100; the first neutral wire output end Lout1 is electrically connected to the first neutral wire noise end Ln1 through the second capacitor C2; the first neutral wire noise end Ln1 is electrically connected to the ground wire G through the first resistor R1. The resistance value of the first resistor R1 is, for example, 1KΩ. The first neutral wire noise end Ln1 is electrically connected to the multiplexer 73 through the corresponding first neutral wire noise RF port Lr1. The first neutral wire noise RF port Lr1 is also connected to the ground wire G. The first neutral wire noise RF port Lr1 is a port on the RF signal line, and this RF signal line is used to transmit the target noise of the neutral wire L output by the first neutral wire noise end Ln1 to the multiplexer 73; at least a part of the second magnetic rod M2 is inserted into the second cylindrical coil, and the insertion depth of the second magnetic rod M2 into the second cylindrical coil is adjustable. The second magnetic rod M2 is inserted from the end of the second cylindrical coil far away from the second tapered transition coil; the first live wire input end Nin1 is electrically connected to the ground wire G through the third capacitor C3; the first live wire output end Nout1 is electrically connected to the first live wire noise end Nn1 through the fourth capacitor C4; the first live wire noise end Nn1 is electrically connected to the ground wire G through the second resistor R2. The first live wire noise end Nn1 is electrically connected to the multiplexer 73 through the corresponding first live wire noise RF port Nr1. The first live wire noise RF port Nr1 is also connected to the ground wire G. The first live wire noise RF port Nr1 is a port on the RF signal line, and this RF signal line is used to transmit the target noise of the live wire N output by the first live wire noise end Nn1 to the multiplexer 73. Inserting a magnetic rod into an inductor coil is used to increase the inductance value of the inductor in the low-frequency band, which is beneficial to avoiding too small an inductance value and the input impedance of the target noise signal. Moreover, the insertion depth is adjustable, and it can be adjusted to the optimal matching position before testing to improve the test reliability.

[0050] In some embodiments, such as Figure 7 and Figure 8As shown, the power supply output terminals of the second line impedance stabilization network 42 include a second neutral line output terminal Lout2 and a second live line output terminal Nout2; the bypass 8 includes a first bypass unit 81 and a second bypass unit 82, and the adapter power supply terminal 2 includes a neutral line power supply terminal 21 and a live line power supply terminal 22. The first input terminal of the first bypass unit 81 is electrically connected to the first neutral line output terminal Lout1, the second input terminal of the first bypass unit 81 is electrically connected to the second neutral line output terminal Lout2, and the output terminal of the first bypass unit 81 is electrically connected to the neutral line power supply terminal 21. The first input terminal of the second bypass unit 82 is electrically connected to the first live line output terminal Nout1, the second terminal of the second bypass unit 82 is electrically connected to the second live line output terminal Nout2, and the output terminal of the second bypass unit 82 is electrically connected to the live line power supply terminal 22. In the first state, the first input terminal and the output terminal of the first bypass unit 81 are conducting, and the second input terminal and the output terminal of the first bypass unit 81 are cut off, that is, the first neutral line output terminal Lout1 is connected to the neutral line power supply terminal 21. The first input terminal and the output terminal of the second bypass unit 82 are conducting, and the second input terminal and the output terminal of the second bypass unit 82 are cut off, that is, the first live line output terminal Nout1 is connected to the live line power supply terminal 22. In the second state, the first input terminal and the output terminal of the first bypass unit 81 are cut off, and the second input terminal and the output terminal of the first bypass unit 81 are conducting, that is, the second neutral line output terminal Lout2 is connected to the neutral line power supply terminal 21. The first input terminal and the output terminal of the second bypass unit 82 are cut off, and the second input terminal and the output terminal of the second bypass unit 82 are conducting, that is, the second live line output terminal Nout2 is connected to the live line power supply terminal 22.

[0051] In some embodiments, as Figure 8 shown, the second line impedance stabilization network 42 includes: a second neutral line input terminal Lin2, the second neutral line input terminal Lin2 is electrically connected to the second electromagnetic interference filter 12; a second neutral line inductor LL2 electrically connected between the second neutral line input terminal Lin2 and the second neutral line output terminal Lout2, the second neutral line inductor LL2 is an air-core coil inductor, the second neutral line inductor LL2 is a cylindrical coil, and the inductance value of the second neutral line inductor LL2 is, for example, 50 μH; a third magnetic rod M3 at least partially inserted into the second neutral line inductor LL2, and the insertion depth of the third magnetic rod M3 into the second neutral line inductor LL2 is adjustable; the second neutral line input terminal Lin2 is electrically connected to the ground wire G through a fifth capacitor C5, Figure 8The left end of the neutral ground wire G is the ground wire input end of the second line impedance stabilization network 52, which is electrically connected to the second electromagnetic interference filter 12. The right end of the ground wire G is the ground wire output end of the second line impedance stabilization network 42, which is electrically connected to the socket panel 100. The second neutral line output end Lout2 is electrically connected to the second neutral line noise end Ln2 through the sixth capacitor C6. The fifth capacitor C5 and the sixth capacitor C6 can be, for example, 1812 ceramic capacitors with a capacitance of 100 nF and a voltage of 630 V. The second neutral line noise end Ln2 is electrically connected to the ground wire G through the third resistor R3. The resistance value of the third resistor R3 is, for example, 1 KΩ. The second neutral line noise end Ln2 is electrically connected to the multiplexer 73 through the corresponding second neutral line noise RF port Lr2. The second line impedance stabilization network 42 further includes a second live wire input end Nin2, which is electrically connected to the second electromagnetic interference filter 12. A second live wire inductor NL2 is electrically connected between the second live wire input end Nin2 and the second live wire output end Nout2. The second live wire inductor NL2 is an air-core coil inductor and is a cylindrical coil. The second line impedance stabilization network 42 further includes a fourth magnetic rod M4 that is at least partially inserted into the second live wire inductor NL2, and the depth of insertion of the fourth magnetic rod M4 into the second live wire inductor NL2 is adjustable. The second live wire input end Nin2 is electrically connected to the ground wire G through the seventh capacitor C7. The second live wire output end Nout2 is electrically connected to the second live wire noise end Nn2 through the eighth capacitor C8. The second live wire noise end Nn2 is electrically connected to the ground wire G through the fourth resistor R4. The second live wire noise end Nn2 is electrically connected to the multiplexer 73 through the corresponding second live wire noise RF port Nr2. The above-mentioned first magnetic rod M1 to the fourth magnetic rod M4 can all be nickel-zinc high-frequency magnetic rods.

[0052] As [[ID=!]] Figure 9 shown, an electromagnetic compatibility test method is further provided in an embodiment of the present application, including:

[0053] Step 101: Test and obtain the target noise source voltage and the target noise source impedance through a test device. This test device can be the test device in any of the above embodiments. The specific process and principle of this step are the same as those in the above embodiments and will not be elaborated here;

[0054] Step 102: Simulate the cable radiation test result through a cable radiation model;

[0055] Step 103: Simulate the environmental test result through an environmental test model. The execution order among steps 101, 102, and 103 is not limited in the embodiment of the present application;

[0056] Step 104: Obtain the electromagnetic compatibility test result based on the target noise source voltage, the target noise source impedance, the cable radiation test result, and the environmental test result.

[0057] The execution entity of this method may be the above-mentioned host computer 74.

[0058] As Figure 10 shown, an embodiment of the present application further provides an electronic device 900. The electronic device 900 includes: a processor 901, and the processor 901 is configured to execute computer programs or instructions in a memory 902 to implement the electromagnetic compatibility test method as described in the above embodiments. The electronic device 900 may be the above-mentioned host computer 74.

[0059] It should be noted that the processor 901 may be any chip with computing capabilities, and is not limited to a central processing unit (CPU). For example, the processor 901 may be a chip including one or more transistors, resistors, capacitors, and other circuit elements for implementing certain functions; or it may be various packaged integrated circuits capable of implementing the above method.

[0060] Exemplarily, the processor 901 may include one or more processing units. For example: the processor 901 includes a neural-network processing unit (NPU), and may also include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a digital signal processor (DSP), a baseband processor, etc. Among them, different processing units may be independent devices or integrated in one or more processors. The controller can generate operation control signals according to the instruction operation code and timing signals to complete the control of fetching instructions and executing instructions.

[0061] The memory 902 may be used to store computer-executable program codes, and the executable program codes include instructions. The internal memory may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, application programs required for at least one function, etc. The data storage area may store data created during the use of the electronic device (such as input data, output data), etc. In addition, the internal memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor executes various functional applications and data processing of the electronic device by running the instructions stored in the internal memory and / or the instructions stored in the memory provided in the processor.

[0062] It should be understood that the structure illustrated in Embodiment 6 of the present application is only an example and does not constitute a limitation on the electronic device. The electronic device in the embodiments of the present application may include more or fewer components than those illustrated, or combine certain components, or split certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0063] The embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium includes a stored program, and when the program is executed by a processor, the electromagnetic compatibility test method as described in the above embodiments is implemented.

[0064] The embodiments of the present application further provide a computer program product, where the program product includes a program, and when the program is run on an electronic device, the electronic device is enabled to implement the electromagnetic compatibility test method as described in the above embodiments.

[0065] The embodiments of the present application further provide a chip system, including: a communication interface for inputting and / or outputting data; a processor for executing a computer-executable program, so that a device installed with the chip system executes the electromagnetic compatibility test method as described in the above embodiments.

[0066] The electronic device involved in the present application may be any product such as a personal computer (PC), a server, etc.

[0067] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk).

[0068] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent the cases of A existing alone, A and B existing simultaneously, and B existing alone. Where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" and its similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c can be single or multiple.

[0069] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A testing device, characterized in that, Including: An electromagnetic interference filtering module, which is electrically connected to the ground wire, and is used to filter out interference noise based on the live wire signal and the neutral wire signal; An adapter power supply terminal, which is used to be electrically connected to the input end of the target adapter; A target noise separation module, which is electrically connected to the ground wire, and is used to separate the target noise in the target frequency range based on the live wire signal and the neutral wire signal output by the electromagnetic interference filtering module and supply power to the adapter power supply terminal; An analog load, the input end of which is used to be electrically connected to the output end of the target adapter; A current loop, the input end of the analog load is electrically connected to the ground wire through the current loop; A measurement module, which is used to obtain the target noise source voltage and the target noise source impedance according to the target noise separated by the target noise separation module.

2. The test device according to claim 1, wherein The electromagnetic interference filtering module includes: A first electromagnetic interference filter, which is electrically connected to the ground wire, and is used to filter out interference noise in the first frequency range based on the input live wire signal and neutral wire signal; A second electromagnetic interference filter, which is used to filter out interference noise in the second frequency range based on the input live wire signal and neutral wire signal, and the lowest value of the first frequency range is greater than or equal to the highest value of the second frequency range; The target noise separation module includes: A first line impedance stabilization network, which is electrically connected to the ground wire, and is used to separate a first target noise and a second target noise based on the live wire signal and the neutral wire signal output by the first electromagnetic interference filter. The first target noise is the live wire target noise in the third frequency range, and the second target noise is the neutral wire target noise in the third frequency range. The third frequency range belongs to the first frequency range; A second line impedance stabilization network, which is electrically connected to the ground wire, and is used to separate a third target noise and a fourth target noise based on the live wire signal and the neutral wire signal output by the second electromagnetic interference filter. The third target noise is the live wire target noise in the fourth frequency range, and the fourth target noise is the neutral wire target noise in the fourth frequency range. The fourth frequency range belongs to the second frequency range; The test device further includes: a bypass, which is used to switch between a first state and a second state; In the first state, the bypass is used to conduct between the power supply output terminal of the first line impedance stabilization network and the adapter power supply terminal, and cut off between the power supply output terminal of the second line impedance stabilization network and the adapter power supply terminal. The power supply output terminal is used to output the live wire signal and the neutral wire signal; In the second state, the bypass device is used to connect the power supply output end of the second line impedance stabilization network to the power supply end of the adapter, and to cut off the power supply output end of the first line impedance stabilization network from the power supply end of the adapter; The measurement module includes: Spectrum analyzer, used to measure the target noise source voltage; Vector network analyzer, used to measure the target noise source impedance; A multiplexer, wherein the multiplexer is used to transmit the first target noise and the second target noise to the spectrum analyzer and the vector network analyzer in a time-sharing manner in the first state, and the multiplexer is also used to transmit the third target noise and the fourth target noise to the spectrum analyzer and the vector network analyzer in a time-sharing manner in the second state.

3. The testing device according to claim 2, characterized in that, Also includes: a voltage regulator, configured to regulate voltage based on an input live line signal and a neutral line signal, and output the regulated live line signal and neutral line signal to the first electromagnetic interference filter; The second electromagnetic interference filter is specifically configured to filter out interference noise in the second frequency range based on the live line signal and the neutral line signal output by the first electromagnetic interference filter; The first frequency range and the third frequency range are both [30 MHz, 300 MHz], and the second frequency range and the fourth frequency range are both [150 KHz, 30 MHz].

4. The test device according to claim 2, characterized in that, Also includes: A socket panel, the socket panel is provided with a plug portion for connecting to the input end of the target adapter, and the adapter power supply end is provided on the plug portion; A crown spring spring is provided around the socket panel, the crown spring spring is electrically connected to the ground wire, and the crown spring spring is provided with a spring hole; The current loop device comprises: A lifting platform is located above the socket panel, and a USB male connector is provided at the bottom of the lifting platform. The USB male connector is electrically connected to a charging cable, and the charging cable is electrically connected to the simulated load; A metal column is fixedly provided on the lifting platform, and the current loop device includes a first current loop capacitor and a second current loop capacitor, wherein a first end of the first current loop capacitor is electrically connected to the power supply terminal of the USB male connector, a second end of the first current loop capacitor is electrically connected to the metal column, a first end of the second current loop capacitor is electrically connected to the ground terminal of the USB male connector, and a second end of the second current loop capacitor is electrically connected to the metal column; The metal column is inserted into the spring hole of the crown spring spring; The testing equipment further comprises: A lifting device is used to drive the lifting platform to perform a lifting function relative to the socket panel.

5. The test device according to claim 4, characterized in that, Also includes: a first circuit board, the first circuit board being detachably connected to the lifting platform, the USB male connector being fixed to the first circuit board, the lifting platform being a metal lifting platform, the second ends of the first current loop capacitor and the second current loop capacitor being electrically connected to the lifting platform via a grounding portion on the first circuit board, and the lifting platform being connected to the metal column; A second circuit board is provided on the lifting platform, wherein a USB female socket is provided on the second circuit board, and the USB female socket is electrically connected to the charging cable; A connector, through which the first circuit board and the second circuit board are electrically connected.

6. The testing device according to claim 4, characterized in that, It further includes: A third circuit board, on which the bypasser, the first line impedance stabilization network and the second line impedance stabilization network are arranged; A fourth circuit board, on which the multiplexer, the first electromagnetic interference filter and the second electromagnetic interference filter are arranged; A controller arranged on the fourth circuit board, which is used to control the multiplexer and the lifting device; A metal shielding cover, a accommodating space formed by the metal shielding cover and the third circuit board, and the bypasser, the first line impedance stabilization network and the second line impedance stabilization network are located in the accommodating space.

7. The test device according to claim 2, wherein The first line impedance stabilization network includes: A first neutral line input terminal and a first neutral line output terminal; A first neutral line inductor electrically connected between the first neutral line input terminal and the first neutral line output terminal, the first neutral line inductor being an air-core coil inductor. The side of the first neutral line inductor close to the first neutral line input terminal is a first cylindrical coil, and the side of the first neutral line inductor close to the first neutral line output terminal is a first tapered transition coil. The tapered end of the first tapered transition coil is electrically connected to the first neutral line output terminal; A first live line input terminal and a first live line output terminal, and the first neutral line output terminal and the first live line output terminal are the power supply output terminals of the first line impedance stabilization network; A first live line inductor electrically connected between the first live line input terminal and the first live line output terminal, the first live line inductor being an air-core coil inductor. The side of the first live line inductor close to the first live line input terminal is a second cylindrical coil, and the side of the first live line inductor close to the first live line output terminal is a second tapered transition coil. The tapered end of the second tapered transition coil is electrically connected to the first live line output terminal.

8. The test device according to claim 7, wherein The first line impedance stabilization network further includes: A first magnetic rod at least partially inserted into the first cylindrical coil, and the depth of insertion of the first magnetic rod into the first cylindrical coil is adjustable; The first neutral line input terminal is electrically connected to the ground wire through a first capacitor; The first neutral line output terminal is electrically connected to a first neutral line noise terminal through a second capacitor; The first neutral line noise terminal is electrically connected to the ground wire through a first resistor, and the first neutral line noise terminal is electrically connected to the multiplexer through a corresponding first neutral line noise radio frequency port; A second magnetic rod at least partially inserted into the second cylindrical coil, and the depth of insertion of the second magnetic rod into the second cylindrical coil is adjustable; The first live line input terminal is electrically connected to the ground wire through a third capacitor; The first live line output terminal is electrically connected to a first live line noise terminal through a fourth capacitor; The first live line noise terminal is electrically connected to the ground wire through a second resistor, and the first live line noise terminal is electrically connected to the multiplexer through a corresponding first live line noise radio frequency port.

9. The test device according to claim 7 or 8, wherein The power supply output terminal of the second line impedance stabilization network includes a second neutral line output terminal and a second live line output terminal; The bypasser includes a first bypass unit and a second bypass unit, and the adapter power supply terminal includes a neutral line power supply terminal and a live line power supply terminal; The first input terminal of the first bypass unit is electrically connected to the first neutral line output terminal, the second input terminal of the first bypass unit is electrically connected to the second neutral line output terminal, and the output terminal of the first bypass unit is electrically connected to the neutral line power supply terminal; The first input terminal of the second bypass unit is electrically connected to the first live line output terminal, the second terminal of the second bypass unit is electrically connected to the second live line output terminal, and the output terminal of the second bypass unit is electrically connected to the live line power supply terminal; In the first state, the first input terminal and the output terminal of the first bypass unit are conducting, the second input terminal and the output terminal of the first bypass unit are cut off, the first input terminal and the output terminal of the second bypass unit are conducting, and the second input terminal and the output terminal of the second bypass unit are cut off; In the second state, the first input terminal and the output terminal of the first bypass unit are cut off, the second input terminal and the output terminal of the first bypass unit are conducting, the first input terminal and the output terminal of the second bypass unit are cut off, and the second input terminal and the output terminal of the second bypass unit are conducting.

10. The test device according to claim 9, wherein The second line impedance stabilization network includes: A second neutral line input terminal; A second neutral line inductor electrically connected between the second neutral line input terminal and the second neutral line output terminal, the second neutral line inductor being an air-core coil inductor, and the second neutral line inductor being a cylindrical coil; A third magnetic rod at least partially inserted into the second neutral line inductor, and the depth of insertion of the third magnetic rod into the second neutral line inductor is adjustable; The second neutral line input terminal is electrically connected to the ground wire through a fifth capacitor; The second neutral line output terminal is electrically connected to a second neutral line noise terminal through a sixth capacitor; The second neutral line noise terminal is electrically connected to the ground wire through a third resistor, and the second neutral line noise terminal is electrically connected to the multiplexer through a corresponding second neutral line noise RF port; A second live line input terminal; A second live line inductor electrically connected between the second live line input terminal and the second live line output terminal, the second live line inductor being an air-core coil inductor, and the second live line inductor being a cylindrical coil; A fourth magnetic rod at least partially inserted into the second live line inductor, and the depth of insertion of the fourth magnetic rod into the second live line inductor is adjustable; The second live line input terminal is electrically connected to the ground wire through a seventh capacitor; The second live line output terminal is electrically connected to a second live line noise terminal through an eighth capacitor; The second live line noise terminal is electrically connected to the ground wire through a fourth resistor, and the second live line noise terminal is electrically connected to the multiplexer through a corresponding second live line noise RF port.

11. An electromagnetic compatibility test method, characterized in that, Includes: Obtaining a target noise source voltage and a target noise source impedance through the test device according to any one of claims 1 to 10; Obtaining a cable radiation test result through cable radiation model simulation; Obtain environmental test results through simulation of the test environment model; Obtain electromagnetic compatibility test results based on the target noise source voltage, the target noise source impedance, the cable radiation test results, and the environmental test results.

12. An electronic device, characterized in that, Including: A processor and a memory, the memory is used to store at least one instruction, when the instruction is loaded and executed by the processor, the electronic device is caused to execute the method described in claim 11.

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