Test device and test method

Abstract

The invention discloses test equipment and a test method. The test equipment comprises a test cavity, a radio frequency module, an antenna and a processing assembly, a test cavity is arranged in the test cavity, and the test cavity is used for accommodating a tested piece; the radio frequency module comprises a transmitter, a receiver, a first coupler, a second coupler and a switching piece, the transmitter is used for outputting radio frequency signals, and the first coupler is used for collecting the radio frequency signals output by the transmitter; the antenna is used for feeding a radio frequency signal into the test cavity and receiving electromagnetic waves radiated by the tested piece; the second coupler is used for collecting electromagnetic waves radiated by the tested piece and received by the antenna; the processing assembly is connected with the transmitter, the receiver and the switching member, and the processing assembly is used for controlling the switching member to connect the receiver with the first coupler or connect the receiver with the second coupler. According to the test equipment, the receiver can be used for detecting the radio-frequency signal, and closed-loop control is carried out on the radio-frequency signal.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment testing, and in particular to a testing device and a testing method. Background Art

[0002] At present, electronic equipment needs to have a certain electromagnetic compatibility (EMC) so that it can operate in an electromagnetic interference environment in accordance with the requirements and not cause unbearable electromagnetic interference to other devices in the environment. Electromagnetic compatibility testing includes radiation immunity testing (EMS) and radiation interference testing (EMI). Among them, EMS testing has high requirements for the accuracy of the output RF signal parameters. Therefore, how to perform closed-loop control of the generated RF signal during the test to obtain the required parameters has become a technical problem to be solved. Summary of the invention

[0003] The embodiments of the present invention provide a testing device and a testing method to solve at least one of the above-mentioned technical problems.

[0004] A test device according to an embodiment of the present invention includes a test cavity, a radio frequency module, an antenna, and a processing component;

[0005] A test cavity is provided in the test cavity, and the test cavity is used to accommodate the tested object;

[0006] The radio frequency module includes a transmitter, a receiver, a first coupler, a second coupler and a switch, the transmitter is used to output a radio frequency signal, and the first coupler is used to collect the radio frequency signal output by the transmitter;

[0007] The antenna is used to feed the radio frequency signal into the test cavity and to receive the electromagnetic wave radiated by the device under test;

[0008] The second coupler is used to collect electromagnetic waves radiated by the device under test and received by the antenna;

[0009] The processing component is connected to the transmitter, the receiver and the switch, and is used to control the switch to connect the receiver to the first coupler or to connect the receiver to the second coupler.

[0010] In the above-mentioned test equipment, the processing component can control the switching component to connect the receiver to the first coupler, or to connect the receiver to the second coupler. When the receiver is connected to the first coupler, the test equipment can use the receiver to detect the RF signal output by the transmitter in the EMS test, thereby realizing the use of the receiver to detect the RF signal and perform closed-loop control of the RF signal. When the receiver is connected to the second coupler, the test equipment can perform EMI testing.

[0011] In some embodiments, the first coupler is used to collect the radio frequency signal output by the transmitter and form a first output signal;

[0012] The second coupler is used to collect the electromagnetic waves radiated by the device under test and received by the antenna and form a second output signal;

[0013] When the receiver is connected to the first coupler, the receiver is used to receive and process the first output signal to form a third output signal, and the processing component is used to adjust the parameters of the radio frequency signal according to the third output signal, and control the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal;

[0014] When the receiver is connected to the second coupler, the receiver is used to receive and process the second output signal to form a fourth output signal, and the processing component is used to obtain parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

[0015] In some embodiments, the transmitter includes a signal source and an amplifier, the output of the signal source is connected to the input of the amplifier, the output of the amplifier is connected to the antenna, and the processing component is used to adjust the power of the signal source and / or the gain level of the amplifier to adjust the parameters of the RF signal according to the third output signal.

[0016] In some embodiments, the signal source includes a radio frequency phase-locked loop, a phase shifter, and an adjustable attenuator, the radio frequency phase-locked loop is connected to the processing component, and the radio frequency phase-locked loop is used to output the radio frequency signal;

[0017] The phase shifter is connected to the output end of the radio frequency phase-locked loop, and the phase shifter is used to adjust the phase of the radio frequency signal output by the radio frequency phase-locked loop;

[0018] The adjustable attenuator is connected to the output end of the phase shifter and the input end of the amplifier, and is used to perform gain adjustment on the radio frequency signal output by the phase shifter.

[0019] In some embodiments, the receiver includes a mixer and a processing unit, wherein a first input terminal of the mixer is connected to the switching element, a second input terminal of the mixer is connected to the processing component, an output terminal of the mixer is connected to the processing unit, and the processing component is connected to the processing unit;

[0020] In a case where the receiver is connected to the second coupler, the mixer is used to convert the second output signal into a fifth output signal, and the processing unit is used to process the fifth output signal to form the fourth output signal.

[0021] In some embodiments, the processing unit includes a digital signal link unit and an analog-to-digital converter, the input end of the analog-to-digital converter is connected to the output end of the mixer, and the output end of the analog-to-digital converter is connected to the digital signal link unit.

[0022] In some embodiments, the receiver further includes an adjustable amplifier, an input end of the adjustable amplifier is connected to the switch element, and an output end of the adjustable amplifier is connected to the first input end of the mixer.

[0023] In some embodiments, the fifth output signal is a zero intermediate frequency signal.

[0024] A testing method according to an embodiment of the present invention comprises:

[0025] Get test instructions;

[0026] When the test instruction is a first test instruction, a first test is performed, wherein the first test includes:

[0027] Controlling the switch to connect the receiver to the first coupler and disconnect the receiver from the second coupler;

[0028] When the test instruction is a second test instruction, a second test is performed, wherein the second test includes:

[0029] The switch is controlled to disconnect the receiver from the first coupler and connect the receiver to the second coupler.

[0030] The above test method can control the switch to connect the receiver to the first coupler, or connect the receiver to the second coupler to perform different tests, thereby realizing the sharing of the transmitter's power detection channel and the broadband receiving channel of radiated interference, and reducing hardware costs.

[0031] In certain embodiments, the first test further comprises:

[0032] Controlling the transmitter to output a radio frequency signal and controlling the device under test to start, wherein the radio frequency signal is fed into the test cavity via the antenna, and the device under test is accommodated in the test cavity;

[0033] Controlling the receiver to receive and process the first output signal output by the first coupler to form a third output signal;

[0034] According to the third output signal, adjusting the parameters of the radio frequency signal, and controlling the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal;

[0035] The second test also includes:

[0036] Controlling the device under test to start, and the antenna to receive electromagnetic waves radiated by the device under test;

[0037] The receiver is controlled to receive and process the second output signal output by the second coupler to form a fourth output signal, and the parameters of the electromagnetic wave radiated by the device under test are obtained according to the fourth output signal.

[0038] In some embodiments, the transmitter includes a signal source and an amplifier, and adjusting the parameters of the radio frequency signal according to the third output signal includes:

[0039] According to the third output signal, the power of the signal source and / or the gain level of the amplifier are adjusted to adjust the parameters of the radio frequency signal.

[0040] In some embodiments, the receiver includes a mixer;

[0041] Controlling the receiver to receive and process the second output signal output by the second coupler to form a fourth output signal includes: controlling the mixer to convert the second output signal into a fifth output signal, and processing the fifth output signal to form the fourth output signal.

[0042] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0044] Figure 1 It is a structural schematic diagram of a testing device according to an embodiment of the present invention;

[0045] Figure 2 It is an exploded schematic diagram of a testing device according to an embodiment of the present invention;

[0046] Figure 3 A schematic diagram of a module of a testing device according to an embodiment of the present invention;

[0047] Figure 4 A schematic diagram of a module of a signal source according to an embodiment of the present invention;

[0048] Figures 5 to 7 The flowchart of the testing method according to the embodiment of the present invention is shown in FIG.

[0049] Component Symbols:

[0050] Test equipment 200, test cavity 10, RF module 20, antenna 30, processing component 40, control panel 50, door body 60, electrical room 70, heat dissipation component 80, power supply module 90, test cavity 102, opening 104, transmitter 202, receiver 204, first coupler 206, second coupler 208, switching member 210, connecting part 212, signal source 214, amplifier 216, RF phase-locked loop 218, phase shifter 220, adjustable attenuator 222, mixer 224, processing unit 226, digital signal link unit 228, analog-to-digital converter 230, adjustable amplifier 232, display screen 502, air guide 802, heat dissipation fan 804, air inlet 806, air outlet 808. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0056] Please refer to Figures 1 to 3 A test device 200 according to an embodiment of the present invention includes a test cavity 10, a radio frequency module 20, an antenna 30 and a processing component 40. A test cavity 102 is provided in the test cavity 10, and the test cavity 102 is used to accommodate the device under test. The radio frequency module 20 includes a transmitter 202, a receiver 204, a first coupler 206, a second coupler 208 and a switching element 210. The transmitter 202 is used to output a radio frequency signal, and the first coupler 206 is used to collect the radio frequency signal output by the transmitter 202. The antenna 30 is used to feed the radio frequency signal into the test cavity 102, and to receive the electromagnetic wave radiated by the device under test. The second coupler 208 is used to collect the electromagnetic wave radiated by the device under test received by the antenna 30. The processing component 40 connects the transmitter 202, the receiver 204 and the switching element 210, and the processing component 40 is used to control the switching element 210 to connect the receiver 204 to the first coupler 206 or to connect the receiver 204 to the second coupler 208.

[0057] In the above-mentioned test equipment 200, the processing component 40 can control the switching element 210 to connect the receiver 204 to the first coupler 206, or to connect the receiver 204 to the second coupler 208. When the receiver 204 is connected to the first coupler 206, the test equipment 200 can use the receiver 204 to detect the RF signal output by the transmitter 202 in the EMS (Electro Magnetic Susceptibility, radiated immunity) test, and realize the use of the receiver 204 to detect the RF signal and perform closed-loop control on the RF signal. When the receiver 204 is connected to the second coupler 208, the test equipment 200 can perform EMI (Electro Magnetic Interference, radiated interference) test. That is, in the RF signal detection of EMS, the RF signal is detected by the receiving channel of the EMI test. In one embodiment, the receiving channel of the EMI test supports the reception and detection of microwave signals from 30MHz to 18GHz, so it is fully capable of detecting the 30MHz to 6GHz of the transmitting channel of the EMS test.

[0058] Specifically, the device under test includes but is not limited to the first coupler 206 which can be used as a forward coupler, and the second coupler 208 which can be used as a backward coupler. In the EMS test, the processing component 40 controls the switching component 210 to connect the receiver 204 with the first coupler 206 and disconnect the receiver 204 from the second coupler 208 according to the EMS test instruction, the device under test is started, the transmitter 202 outputs the RF signal, and the antenna 30 feeds the RF signal into the test cavity 102 to form an electromagnetic interference environment for the device under test, and perform an EMS test on the device under test. In one embodiment, during the EMS test process, a camera can be used to capture an image of the device under test, and the processing component 40 uses image processing technology to process the image of the device under test to identify whether the device under test can work normally in the electromagnetic interference environment.

[0059] During the EMI test, the processing component 40 controls the switching component 210 to connect the receiver 204 to the second coupler 208 and disconnect the receiver 204 from the first coupler 206 according to the EMI test instruction, the device under test is started, and the device under test radiates electromagnetic waves in the test cavity 102. The antenna 30 receives the electromagnetic waves radiated by the device under test, and the second coupler 208 collects the electromagnetic waves radiated by the device under test received by the antenna 30 and forms a coupled signal, which is input into the receiver 204 for processing.

[0060] exist Figure 2 In the figure, the test cavity 10 is in the shape of a cuboid, and the test cavity 102 is also in the shape of a cuboid. It is understood that the shapes of the test cavity 10 and the test cavity 102 are not limited to the cuboid shape, but may be other regular or irregular shapes, which are not specifically limited here. Optionally, the test cavity 10 is made of a material having the ability to shield radio frequency signals, such as the test cavity 10 may be a metal cavity. Further, the test cavity 10 may include a body made of plastic material and a metal layer covering the surface of the body to reduce manufacturing costs and reduce weight.

[0061] Optionally, the antenna 30 may be extended into the test cavity 102 in whole or in part. The antenna 30 may be an array antenna 30 or other types of antennas 30, which are not specifically limited herein. The number of antennas 30 may be one, two, or more than two, which are not specifically limited herein. Optionally, the antenna 30 is a broadband antenna 30.

[0062] The switching member 210 is connected to the receiver 204. The switching member 210 has a movable connecting portion 212. The processing component 40 can control the connecting portion 212 to be connected to the first coupler 206 or the second coupler 208 according to the test requirements. When the connecting portion 212 is connected to the first coupler 206, the receiver 204 is connected to the first coupler 206. When the connecting portion 212 is connected to the second coupler 208, the receiver 204 is connected to the second coupler 208.

[0063] exist Figure 1 and Figure 2 In the embodiment, the test device 200 further includes a control panel 50 installed on the test cavity 10, and the control panel 50 is electrically connected to the RF module 20. The control panel 50 may include operating components such as buttons and a touch screen, and an operator may set the test type and set the parameters of the RF signal through the operating components, such as the frequency, phase, power, etc. of the RF signal, so as to generate a variety of RF signals within a certain frequency band, and simulate the complex electromagnetic interference scenario of the device under test in the actual environment.

[0064] The test device 200 further includes a door body 60, an electrical room 70 and a heat dissipation assembly 80. An opening 104 is provided on one side of the test chamber 102. The door body 60 is rotatably mounted at the opening 104 to open or close the opening 104. When the door body 60 opens the opening 104, the operator can take and place the test piece. When the door body 60 is closed, the test can be performed.

[0065] The electrical chamber 70 is located outside the test chamber 102, and the heat dissipation assembly 80 and the RF module 20 are located in the electrical chamber 70. The heat dissipation assembly 80 is used to dissipate heat for the RF module 20 and other components located in the electrical chamber 70. In one embodiment, the heat dissipation assembly 80 can dissipate heat for the RF module 20 by liquid cooling. In one embodiment, the heat dissipation assembly 80 can dissipate heat for the RF module 20 by air cooling. In one embodiment, the heat dissipation assembly 80 can dissipate heat for the RF module 20 by liquid cooling and air cooling.

[0066] exist Figure 2 In the figure, the heat dissipation assembly 80 includes an air guide 802 and a heat dissipation fan 804. The air guide 802 covers the RF module 20. The air guide 802 is provided with an air inlet 806 and an air outlet 808. The air inlet 806 is provided corresponding to the heat dissipation fan 804. In this way, the heat dissipation assembly 80 can dissipate heat from the RF module 20 by air cooling.

[0067] The test equipment 200 also includes a power supply module 90 located in the electrical room 70. The power supply module 90 is electrically connected to the RF module 20 and the heat dissipation fan 804. The power supply module 90 is located above the air guide 802 and is thermally connected to the air guide 802. In this way, the power supply module 90 can be cooled to ensure that the power supply module 90 operates within a normal temperature range. The power supply module 90 is electrically connected to various components and parts of the test equipment 200, including but not limited to the RF module 20, the control panel 50, the heat dissipation component 80, etc. A socket is also provided in the test cavity 102. The power supply module 90 can also be electrically connected to the socket in the test cavity 102. The power supply plug of the device under test can be inserted into the socket so that the power supply module 90 can provide the device under test with the electrical energy (DC and / or AC) required for operation, so that the device under test can work, thereby performing EMC (Electromagnetic Compatibility) testing on the device under test.

[0068] In some embodiments, the first coupler 206 is used to collect the radio frequency signal output by the transmitter 202 and form a first output signal. The second coupler 208 is used to collect the electromagnetic wave radiated by the device under test received by the antenna 30 and form a second output signal.

[0069] When the receiver 204 is connected to the first coupler 206, the receiver 204 is used to receive and process the first output signal to form a third output signal, and the processing component 40 is used to adjust the parameters of the RF signal according to the third output signal, and control the transmitter 202 to output the RF signal according to the adjusted parameters of the RF signal.

[0070] When the receiver 204 is connected to the second coupler 208 , the receiver 204 is used to receive and process the second output signal to form a fourth output signal, and the processing component 40 is used to obtain parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

[0071] In this way, the RF signal can be adjusted in the EMS test, and the EMI test can be performed on the device under test.

[0072] Specifically, when the receiver 204 is connected to the first coupler 206, the processing component 40 can adjust the parameters of the RF signal according to the third output signal output by the receiver 204, and control the transmitter 202 to output the RF signal according to the parameters of the adjusted RF signal, thereby realizing closed-loop control of the RF signal in the EMS (Electro Magnetic Susceptibility) test, so that the RF signal meets the EMS test requirements. When the receiver 204 is connected to the second coupler 208, the processing component 40 can obtain the parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal output by the receiver 204, thereby realizing EMI (Electro Magnetic Interference) testing of the device under test.

[0073] The first coupler 206 collects the transmission power of the RF signal output by the transmitter 202 to form a coupled signal. Specifically, the first coupler 206 can couple a certain proportion of the RF signal from the RF signal output by the transmitter 202 (for example, the transmitter 202 outputs a 50W RF signal, and the first coupler 206 can couple a RF signal equivalent to 0.5W) to form a first output signal, which is input to the receiver 204. After receiving the first output signal, the receiver 204 converts it into a third output signal, such as a voltage signal, which is input to the processing component 40. The RF signal includes but is not limited to RF signals in the microwave frequency band.

[0074] The receiver 204 can receive and process the first output signal to form a third output signal. Optionally, the third output signal can be a digital signal to facilitate processing by the processing component 40. The processing component 40 stores a correction relationship (such as a correction table), which includes multiple sets of correspondences between the size of the third output signal (such as voltage size) and the parameters of the radio frequency signal (such as power), and each set of correspondences can meet different test requirements. The correction table can be pre-calibrated by simulation, testing, etc. The power size of the radio frequency signal is related to the field strength value of the electromagnetic field formed in the test cavity 102. In one example, in the EMS test, the test interval of the field strength value is 3V / meter to 10V / meter.

[0075] As an example, in the calibration relationship, one set of corresponding relationships is that the power of the radio frequency signal of 100W corresponds to the third output signal of 1V.

[0076] When the test requirement is that the output power of the RF signal is 100W, the processing component 40 sends a control instruction to the transmitter 202. The transmitter 202 outputs a 100W RF signal according to the control instruction. The first coupler 206 collects the RF signal to form a first output signal. The first output signal is transmitted to the receiver 204. The receiver 204 processes the first output signal to form a third output signal. If the third output signal is 0.8V, the processing component 40 determines that the power of the RF signal needs to be adjusted (increased) according to the correction relationship, and sends an adjustment instruction to the transmitter 202. The transmitter 202 increases the power of the RF signal according to the adjustment instruction until the third output signal is 1V or close to 1V.

[0077] If the third output signal is 1V, or close to 1V, the processing component 40 maintains the current working state of the transmitter 202 without adjusting the power of the RF signal.

[0078] During the EMI test, the processing component 40 controls the switching component 210 to connect the receiver 204 to the second coupler 208 and disconnect the receiver 204 from the first coupler 206 according to the EMI test instructions. The device under test is started, and the device under test radiates electromagnetic waves in the test cavity 102. The antenna 30 receives the electromagnetic waves radiated by the device under test. The second coupler 208 collects the electromagnetic waves radiated by the device under test received by the antenna 30 and forms a coupling signal, which is input into the receiver 204.

[0079] Specifically, the second coupler 208 can couple a certain proportion of the electromagnetic waves received by the antenna 30 to form a second output signal, which is input to the receiver 204. After receiving the second output signal, the receiver 204 converts it into a fourth output signal, such as a voltage signal, which is input to the processing component 40.

[0080] The receiver 204 can receive and process the second output signal to form a fourth output signal. Optionally, the fourth output signal can be a digital signal to facilitate processing by the processing component 40. The processing component 40 obtains the electromagnetic wave parameters radiated by the device under test according to the fourth output signal. Specifically, the processing component 40 stores multiple sets of correspondences between the magnitude (such as voltage) of the fourth output signal and the electromagnetic wave parameters (such as field strength values), and each set of correspondences can meet different test requirements. The correspondence can be pre-calibrated by simulation, testing, etc.

[0081] As an example, a set of correspondence is that a field strength value of 4V / meter corresponds to a fourth output signal of 0.5V. When the fourth output signal acquired by the processing component 40 is 0.5V, according to the above correspondence, the processing component 40 can determine that the field strength value of the electromagnetic wave output by the device under test is 4V / meter. The processing component 40 may include a processor.

[0082] In certain embodiments, see Figure 3 The transmitter 202 includes a signal source 214 and an amplifier 216, the output end of the signal source 214 is connected to the input end of the amplifier 216, the output end of the amplifier 216 is connected to the antenna 30, and the processing component 40 is used to adjust the power of the signal source 214 and / or the gain level of the amplifier 216 according to the third output signal to adjust the parameters of the RF signal.

[0083] In this way, the parameters of the radio frequency signal can be adjusted.

[0084] Specifically, the signal source 214 can generate a radio frequency signal according to the control instruction issued by the processing component 40, the output end of the amplifier 216 is connected to the antenna 30, the signal source 214 generates a radio frequency signal, the amplifier 216 amplifies the radio frequency signal, and the antenna 30 feeds the amplified radio frequency signal into the test cavity 102.

[0085] When the processing component 40 determines that the RF signal needs to be adjusted according to the third input signal, the processing component 40 can adjust the power of the signal source 214 and / or the gain level of the amplifier 216 so that the RF signal meets the EMS test requirements. The amplifier 216 is an adjustable amplifier 232. The transmitter 202 may include one or more amplifiers 216, which are not specifically limited here.

[0086] In one embodiment, the processing component 40 can adjust the power level of the signal source 214 or the gain level of the amplifier 216. In one embodiment, the processing component 40 can adjust the power level of the signal source 214 and the gain level of the amplifier 216.

[0087] In certain embodiments, see Figure 4 The signal source 214 includes a radio frequency phase-locked loop 218, a phase shifter 220, and an adjustable attenuator 222. The radio frequency phase-locked loop 218 is connected to the processing component 40, and the radio frequency phase-locked loop 218 is used to output a radio frequency signal. The phase shifter 220 is connected to the output end of the radio frequency phase-locked loop 218, and the phase shifter 220 is used to adjust the phase of the radio frequency signal output by the radio frequency phase-locked loop 218. The adjustable attenuator 222 is connected to the output end of the phase shifter 220 and the input end of the amplifier 216, and the adjustable attenuator 222 is used to adjust the gain of the radio frequency signal output by the phase shifter 220.

[0088] In this way, RF signals with different parameters can be realized to meet different testing requirements.

[0089] Specifically, the processing component 40 may send a control instruction to the transmitter 202, the control instruction including parameters of the RF signal, such as power and phase, and the RF phase-locked loop 218 may generate a low-power RF signal according to the control instruction. For example, the power of the RF signal generated by the RF phase-locked loop 218 is less than 10W, and further, less than 1W.

[0090] The input end of the phase shifter 220 is connected to the output end of the RF phase-locked loop 218, and receives the RF signal output by the RF phase-locked loop 218. The phase shifter 220 can adjust the phase of the RF signal output by the RF phase-locked loop 218 to meet the test requirements.

[0091] The input end of the adjustable attenuator 222 is connected to the output end of the phase shifter 220. The adjustable attenuator 222 can perform gain adjustment on the RF signal, including power amplification of the RF signal, so that the RF signal can obtain preliminary power amplification. The RF signal adjusted and processed by the adjustable attenuator 222 is input to the amplifier 216 for subsequent amplification processing to obtain a RF signal of required power.

[0092] In certain embodiments, see Figure 3 , the receiver 204 includes a mixer 224 and a processing unit 226, a first input end of the mixer 224 is connected to the switch 210, a second input end of the mixer 224 is connected to the processing component 40, an output end of the mixer 224 is connected to the processing unit 226, and the processing component 40 is connected to the processing unit 226. When the receiver 204 is connected to the second coupler 208, the mixer 224 is used to convert the second output signal into a fifth output signal, and the processing unit 226 is used to process the fifth output signal to form a fourth output signal.

[0093] In this way, the electromagnetic waves received by the antenna 30 can be mixed to reduce the sampling frequency band.

[0094] Specifically, when the receiver 204 is connected to the second coupler 208 , the antenna 30 receives the electromagnetic wave radiated by the device under test, the second coupler 208 forms a second output signal, and the mixer 224 can perform mixing processing (such as first-stage mixing processing) on ​​the second output signal.

[0095] The second output signal input from the second coupler 208 to the mixer 224 is a radio frequency signal. The mixer 224 can use the local oscillator signal to convert the second output signal into a fifth output signal. For example, the local oscillator signal and the second output signal (radio frequency signal) are processed (such as subtraction processing) to obtain the fifth output signal. The local oscillator signal can be provided by the phase-locked loop of the radio frequency module 20. In an example, through the mixing process, the second output signal of 1 GHz can be reduced to the fifth output signal of 100 MHz. The processing unit 226 can use a low-bandwidth device to reduce the cost.

[0096] The processing unit 226 may convert the fifth output signal into a fourth output signal to facilitate processing by the processing component 40 .

[0097] In certain embodiments, see Figure 3 The processing unit 226 includes a digital signal link unit 228 and an analog-to-digital converter 230 , wherein an input end of the analog-to-digital converter 230 is connected to an output end of the mixer 224 , and an output end of the analog-to-digital converter 230 is connected to the digital signal link unit 228 .

[0098] In this way, digital processing of the signal can be achieved.

[0099] Specifically, the analog-to-digital converter 230 can convert the fifth output signal (analog signal) output by the mixer 224 into a digital signal, and the digital signal can be used as the fourth output signal. The magnitude of the digital signal can represent the field strength value of the electromagnetic wave radiated by the device under test.

[0100] The digital signal link unit 228 can process the digital signal output by the analog-to-digital converter 230 to obtain a frequency spectrum corresponding to the digital signal, thereby achieving visualization processing of the digital signal.

[0101] Optionally, the control panel 50 has a display screen 502 , which can display the frequency spectrum for easy viewing by operators.

[0102] In certain embodiments, see Figure 3 The receiver 204 further includes an adjustable amplifier 232 , an input end of the adjustable amplifier 232 is connected to the switch 210 , and an output end of the adjustable amplifier 232 is connected to a first input end of the mixer 224 .

[0103] In this way, the relevant signal can be amplified to improve the test accuracy.

[0104] Specifically, the input end of the adjustable amplifier 232 is connected to the switch 210, and the adjustable amplifier 232 can amplify the second output signal output by the second coupler 208 or the first output signal output by the first coupler 206, and in subsequent processing, the test error can be reduced and the test accuracy can be improved. The gain level of the adjustable amplifier 232 is adjustable to meet different test requirements.

[0105] In some embodiments, the fifth output signal is a zero intermediate frequency (ZIF) signal.

[0106] In this way, the testing efficiency can be improved.

[0107] Specifically, the mixer 224 can convert the second output signal into a zero intermediate frequency signal, so that the RF signal is converted to the baseband without intermediate frequency modulation and demodulation, thereby improving the test efficiency. The receiver 204 with a zero intermediate frequency architecture has the advantages of small size, low power consumption, and easy integration.

[0108] In summary, the test equipment 200 of the embodiment of the present invention reserves the first coupler 206 and the second coupler 208 at the output end of the transmitter 202 for the radiation immunity test, and inputs the coupled signal of the transmission power of the radio frequency signal into the receiving channel for the radiation interference test through the coupler. Since the receiving channel in the EMC test supports the microwave signal reception detection of 30MHz to 18GHz, it is fully capable of detecting the 30MHz to 6GHz of the transmission channel, realizing ultra-wideband power detection, and the detection accuracy can reach 0.5dB. Furthermore, the power detection channel of the transmitter 202 is shared with the broadband receiving channel of the radiation interference, which can reduce the hardware cost.

[0109] Please refer to Figures 5 to 7 , a testing method according to an embodiment of the present invention comprises:

[0110] Step 101, obtaining a test instruction;

[0111] Step 103: When the test instruction is a first test instruction, a first test is performed. The first test includes:

[0112] Step 201, controlling the switch 210 to connect the receiver 204 to the first coupler 206, and disconnecting the receiver 204 from the second coupler 208;

[0113] Step 105: When the test instruction is a second test instruction, a second test is performed, and the second test includes:

[0114] Step 301 : Control the switch 210 to disconnect the receiver 204 from the first coupler 206 and connect the receiver 204 to the second coupler 208 .

[0115] The above test method can control the switch 210 to connect the receiver 204 to the first coupler 206, or to connect the receiver 204 to the second coupler 208 for different tests, thereby realizing the sharing of the power detection channel of the transmitter 202 and the broadband receiving channel of the radiated interference, thereby reducing the hardware cost.

[0116] Specifically, the first test instruction may be an EMS test instruction, the first test may be an EMS test, the second test instruction may be an EMI test instruction, and the second test may be an EMI test. The test instruction may be input by an operator on the control panel 50. The processing component 40 may parse the control instruction to obtain whether the test instruction is the first test instruction or the second test instruction.

[0117] In one embodiment, when performing the first test, the processing component 40 may control the switch 210 to connect the receiver 204 to the first coupler 206 and disconnect the receiver 204 from the second coupler 208 .

[0118] In one embodiment, when performing the second test, the processing component 40 may control the switch 210 to disconnect the receiver 204 from the first coupler 206 and connect the receiver 204 to the second coupler 208 .

[0119] It should be noted that the above explanation of the implementation and beneficial effects of the testing device 200 is also applicable to the testing method of this embodiment, and will not be elaborated here in detail to avoid redundancy.

[0120] In certain embodiments, see Figure 6 , the first test also includes:

[0121] Step 203, controlling the transmitter 202 to output a radio frequency signal and controlling the device under test to start, the radio frequency signal is fed into the test cavity 102 via the antenna 30, and the device under test is accommodated in the test cavity 102;

[0122] Step 205, controlling the receiver 204 to receive and process the first output signal output by the first coupler 206 to form a third output signal;

[0123] Step 207: adjust the parameters of the radio frequency signal according to the third output signal, and control the transmitter 202 to output the radio frequency signal according to the adjusted parameters of the radio frequency signal.

[0124] In this way, the radio frequency signal can be adjusted in the first test.

[0125] Specifically, in one embodiment, the processing component 40 can control the transmitter 202 to output the RF signal and control the device under test to start, for example, control the power supply module 90 to supply power to the device under test to start the device under test. The processing component 40 can control the receiver 204 to receive and process the first output signal output by the first coupler 206 to form a third output signal. The processing component 40 can adjust the parameters of the RF signal according to the third output signal, and control the transmitter 202 to output the RF signal according to the adjusted parameters of the RF signal.

[0126] In certain embodiments, see Figure 7 , the second test also includes:

[0127] Step 303, controlling the device under test to start, and the antenna 30 receives electromagnetic waves radiated by the device under test;

[0128] Step 305: Control the receiver 204 to receive and process the second output signal output by the second coupler 208 to form a fourth output signal, and obtain the parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

[0129] In this way, EMI testing can be performed on the device under test.

[0130] Specifically, in one embodiment, the processing component 40 can control the device under test to start, for example, control the power supply module 90 to supply power to the device under test to achieve power supply to the device under test. The processing component 40 can control the receiver 204 to receive and process the second output signal output by the second coupler 208 to form a fourth output signal, and obtain the parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

[0131] In some embodiments, the transmitter 202 includes a signal source 214 and an amplifier 216, and step 207 includes:

[0132] According to the third output signal, the power of the signal source 214 and / or the gain level of the amplifier 216 are adjusted to adjust the parameters of the RF signal.

[0133] In this way, the parameters of the radio frequency signal can be adjusted.

[0134] In some embodiments, the receiver 204 includes a mixer 224. Step 305 includes controlling the mixer 224 to convert the second output signal into a fifth output signal, and processing the fifth output signal to form a fourth output signal.

[0135] In this way, the electromagnetic waves received by the antenna 30 can be mixed to reduce the sampling frequency band.

[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0137] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A testing device, characterized in that: Includes test chamber, RF module, antenna and processing components; A test cavity is provided in the test cavity, and the test cavity is used to accommodate the tested object; The radio frequency module includes a transmitter, a receiver, a first coupler, a second coupler and a switch, the transmitter is used to output a radio frequency signal, and the first coupler is used to collect the radio frequency signal output by the transmitter; The antenna is used to feed the radio frequency signal into the test cavity and to receive the electromagnetic wave radiated by the device under test; The second coupler is used to collect electromagnetic waves radiated by the device under test and received by the antenna; The processing component is connected to the transmitter, the receiver and the switch, and is used to control the switch to connect the receiver to the first coupler or to connect the receiver to the second coupler.

2. The test device according to claim 1, characterized in that The first coupler is used to collect the radio frequency signal output by the transmitter and form a first output signal; The second coupler is used to collect the electromagnetic waves radiated by the device under test and received by the antenna and form a second output signal; When the receiver is connected to the first coupler, the receiver is used to receive and process the first output signal to form a third output signal, and the processing component is used to adjust the parameters of the radio frequency signal according to the third output signal, and control the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal; When the receiver is connected to the second coupler, the receiver is used to receive and process the second output signal to form a fourth output signal, and the processing component is used to obtain parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

3. The testing device according to claim 2, characterized in that The transmitter includes a signal source and an amplifier, the output end of the signal source is connected to the input end of the amplifier, the output end of the amplifier is connected to the antenna, and the processing component is used to adjust the power of the signal source and / or the gain level of the amplifier according to the third output signal to adjust the parameters of the radio frequency signal.

4. The testing device according to claim 3, characterized in that The signal source comprises a radio frequency phase-locked loop, a phase shifter and an adjustable attenuator, the radio frequency phase-locked loop is connected to the processing component, and the radio frequency phase-locked loop is used to output the radio frequency signal; The phase shifter is connected to the output end of the radio frequency phase-locked loop, and the phase shifter is used to adjust the phase of the radio frequency signal output by the radio frequency phase-locked loop; The adjustable attenuator is connected to the output end of the phase shifter and the input end of the amplifier, and is used to perform gain adjustment on the radio frequency signal output by the phase shifter.

5. The testing device according to claim 2, characterized in that The receiver comprises a mixer and a processing unit, wherein a first input end of the mixer is connected to the switching element, a second input end of the mixer is connected to the processing component, an output end of the mixer is connected to the processing unit, and the processing component is connected to the processing unit; In a case where the receiver is connected to the second coupler, the mixer is used to convert the second output signal into a fifth output signal, and the processing unit is used to process the fifth output signal to form the fourth output signal.

6. The testing device according to claim 5, characterized in that The processing unit comprises a digital signal link unit and an analog-to-digital converter, wherein an input end of the analog-to-digital converter is connected to an output end of the mixer, and an output end of the analog-to-digital converter is connected to the digital signal link unit.

7. The testing device according to claim 5, characterized in that The receiver further comprises an adjustable amplifier, an input end of the adjustable amplifier is connected to the switch element, and an output end of the adjustable amplifier is connected to the first input end of the mixer.

8. The testing device according to claim 5, characterized in that The fifth output signal is a zero intermediate frequency signal.

9. A testing method, characterized in that: include: Get test instructions; When the test instruction is a first test instruction, a first test is performed, wherein the first test includes: Controlling the switch to connect the receiver to the first coupler and disconnect the receiver from the second coupler; When the test instruction is a second test instruction, a second test is performed, wherein the second test includes: The switch is controlled to disconnect the receiver from the first coupler and connect the receiver to the second coupler.

10. The testing method according to claim 9, characterized in that: The first test also includes: Controlling the transmitter to output a radio frequency signal and controlling the device under test to start, wherein the radio frequency signal is fed into the test cavity via the antenna, and the device under test is accommodated in the test cavity; Controlling the receiver to receive and process the first output signal output by the first coupler to form a third output signal; According to the third output signal, adjusting the parameters of the radio frequency signal, and controlling the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal; The second test also includes: Controlling the device under test to start, and the antenna to receive electromagnetic waves radiated by the device under test; The receiver is controlled to receive and process the second output signal output by the second coupler to form a fourth output signal, and the parameters of the electromagnetic wave radiated by the device under test are obtained according to the fourth output signal.

11. The testing method according to claim 10, characterized in that: The transmitter includes a signal source and an amplifier, and adjusting the parameters of the radio frequency signal according to the third output signal includes: According to the third output signal, the power of the signal source and / or the gain level of the amplifier are adjusted to adjust the parameters of the radio frequency signal.

12. The testing method according to claim 10, characterized in that: The receiver includes a mixer; Controlling the receiver to receive and process the second output signal output by the second coupler to form a fourth output signal includes: controlling the mixer to convert the second output signal into a fifth output signal, and processing the fifth output signal to form the fourth output signal.

Images