CN216595345U - Anti-interference test system - Google Patents
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- CN216595345U CN216595345U CN202123152999.6U CN202123152999U CN216595345U CN 216595345 U CN216595345 U CN 216595345U CN 202123152999 U CN202123152999 U CN 202123152999U CN 216595345 U CN216595345 U CN 216595345U
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Abstract
The utility model provides an anti-interference test system, including host computer module, calibration module and test module, the host computer module includes: the device comprises a control unit, a signal transmitting unit, a first coupling unit, a power meter unit, a switch unit and a power attenuation unit; the switch unit controls the on-off state of the switch unit through the control unit, when the switch unit is in a first on state, the system works in a calibration mode, the interference signal output by the signal transmitting unit is calibrated, and the power meter unit receives the open-circuit test voltage acted on the calibration module by the interference signal output by the signal transmitting unit; when the switch unit is in the second conduction state, the system works in a test mode, and the power meter unit receives the interference signal output by the signal transmitting unit so as to monitor whether the signal transmitting unit works normally. The detection efficiency of the conducted disturbance immunity test is improved, meanwhile, the accuracy of the detection result is improved, and the conducted disturbance immunity test work under a complex scene can be dealt with.
Description
Technical Field
The disclosure relates to the technical field of electrical detection, in particular to an anti-interference test system.
Background
At present, with continuous innovation and development of electronic technology, smart phones which are small enough to be in hands of people and automobiles, aircrafts and the like are equipped with various electronic devices to assist people in operation and use, static electricity and other factors generated in the operation process of the electronic devices can generate transient electromagnetic fields with high intensity when the static electricity is discharged, the electromagnetic fields can act on power lines, communication cables, interface cables and other connecting lines of electric and electronic devices to cause the circuits of the electric and electronic devices to break down or even be damaged, and therefore detection needs to be carried out on the performance of resisting the interference when the electric and electronic devices are subjected to electromagnetic field discharge disturbance.
In the existing process of conducting disturbance immunity testing, a detection system is often required to be arranged in a large place, auxiliary facilities such as supporting parts and power supplies are required to be arranged, the testing process is complicated and cannot deal with conducting disturbance immunity testing work under complex scenes such as narrow environments, a calibration device of a radio frequency signal source is required to be set up before the testing device is arranged, the output of the radio frequency signal source needs to be calibrated manually in the testing process, the reading of a voltmeter/power meter is monitored, and the working condition of a detected device is monitored, so that time and labor are consumed greatly, and the accuracy of a detection result is low.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides at least an anti-interference test system, which improves the detection efficiency of conducted disturbance immunity test, improves the accuracy of a detection result, and can cope with conducted disturbance immunity test work in a complex scene.
The embodiment of the present disclosure provides an anti-interference test system, which includes: host computer module, calibration module and test module, wherein, the host computer module includes: the device comprises a control unit, a signal transmitting unit, a first coupling unit, a power meter unit, a switch unit and a power attenuation unit;
the control unit is connected with the signal transmitting unit, the switch unit and the power meter unit; the switch unit comprises a first conduction state and a second conduction state;
when the anti-interference test system needs to carry out signal calibration, the control unit controls the switch unit to be in a first conduction state, and a signal calibration channel is conducted to work;
the signal calibration path comprises the control unit, the signal transmitting unit, the first coupling unit, the power attenuation unit, the switch unit and the power meter unit which are sequentially connected in series, the power attenuation unit in the signal calibration path is connected with the calibration module, the calibration module is used for receiving an interference signal which is output by the signal transmitting unit and attenuated by the power attenuation unit, generating an open-circuit test voltage for calibrating the interference signal, and inputting the open-circuit test voltage to the power attenuation unit;
when the anti-interference test system needs to be tested, the control unit controls the switch unit to be in a second conduction state, and a test access is conducted to work;
the test circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a switch unit and a power meter unit which are sequentially connected in series, the first coupling unit in the test circuit is connected with the power attenuation unit, the test module is connected with the power attenuation unit, and the test circuit is used for detecting whether the signal transmitting unit normally works or not.
In an optional implementation manner, in the signal calibration path, an interference signal output by the signal transmitting unit passes through the first coupling unit, the power attenuation unit, and the calibration module to form an open-circuit test voltage, and the open-circuit test voltage is sent to the power meter unit through the power attenuation unit and the switch unit;
in the test access, an interference signal output by the signal transmitting unit is sent to the power meter unit through the first coupling unit and the switch unit so as to detect whether the signal transmitting unit works normally.
In an alternative embodiment, the control unit is configured to:
controlling the switch unit to be in the first conduction state, adjusting parameters of the interference signal output by the signal transmitting unit under a preset frequency, and storing the calibration output power of the signal transmitting unit when the received open-circuit test voltage of the interference signal output by the signal transmitting unit, which acts on the calibration module, is a preset voltage threshold;
and switching the switch unit from the first conduction state to the second conduction state, adjusting parameters of the interference signal output by the signal transmitting unit according to the calibration output power, and determining whether the signal transmitting unit normally works according to the received power counting number output by the power counting unit.
In an optional embodiment, the signal transmitting unit includes a signal source device and a power amplifying device;
the signal source device is connected with the power amplifier device, and the power amplifier device is connected with the first coupling unit;
the signal source device is used for generating the interference signal;
the power amplifying device is used for amplifying the voltage value of the interference signal generated by the signal source device.
In an optional implementation manner, the control unit includes a human-computer interaction device and a control main board device;
the human-computer interaction device is connected with the control main board device;
the control main board device is connected with the signal transmitting unit, the switch unit and the power meter unit;
the human-computer interaction device is used for collecting test parameters input by a user;
the control mainboard device is used for controlling the conduction state of the switch unit and the parameters of the interference signals output by the signal transmitting unit according to the test parameters.
In an alternative embodiment, the power attenuation unit includes a first power attenuation device and a second power attenuation device;
the first power attenuation device is used for attenuating the power of the interference signal input to the calibration module or the test module by the signal transmitting unit according to a preset first attenuation proportion;
the second power attenuation device is used for attenuating the power input to the switch unit after the interference signal passes through the calibration module according to a preset second attenuation proportion;
the input end of the first power attenuation device is used as the first input end of the power attenuation unit and is connected with the first coupling unit; the output end of the first power attenuation device is used as the first output end of the power attenuation unit;
when the anti-interference test system needs to perform signal calibration, the first output end of the power attenuation unit is connected with the calibration module; the input end of the second power attenuation device is used as the second input end of the power attenuation unit and is connected with the calibration module; the output end of the second power attenuation device is used as a second output end of the power attenuation unit and is connected with the switch unit;
when the anti-interference test system needs to be tested, the first output end of the power attenuation unit is used as the signal output end of the host module and connected with the test module, and interference signals are input into the test module.
In an alternative embodiment, the calibration module comprises: the load unit, the second coupling unit and the ohm conversion unit;
the load unit, the second coupling unit and the ohm conversion unit are sequentially connected;
the second coupling unit is connected with the power attenuation unit, and the ohm conversion unit is connected with the power attenuation unit.
In an alternative embodiment, the second coupling unit is connected to a power input terminal of the device under test;
the second coupling unit is used for coupling the interference signal output by the signal transmitting unit to an input power supply signal of a device to be tested, and is used for generating signal interference aiming at the device to be tested so as to test the anti-interference capability of the device to be tested.
In an optional embodiment, the human-computer interaction device comprises a touch screen and a keyboard;
the touch screen is connected with the control main board device;
the keyboard is connected with the control main board device.
In an optional implementation manner, the interference signal output by the signal transmitting unit is a radio frequency signal.
In an alternative embodiment, the first coupling unit comprises a directional coupler.
The embodiment of the present disclosure provides an anti-interference test system, host module, calibration module and test module, wherein, the host module includes: the device comprises a control unit, a signal transmitting unit, a first coupling unit, a power meter unit, a switch unit and a power attenuation unit; the control unit is connected with the signal transmitting unit, the switch unit and the power meter unit; the switch unit comprises a first conduction state and a second conduction state; when the anti-interference test system needs to carry out signal calibration, the control unit controls the switch unit to be in a first conduction state, and the signal calibration channel conducts and works; the signal calibration circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a power attenuation unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the power attenuation unit in the signal calibration circuit is connected with a calibration module, the calibration module is used for receiving an interference signal which is output by the signal transmitting unit and attenuated by the power attenuation unit, generating an open-circuit test voltage for calibrating the interference signal, and inputting the open-circuit test voltage to the power attenuation unit; when the anti-interference test system needs to be tested, the control unit controls the switch unit to be in a second conduction state, and the test access conducts and works; the test circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the first coupling unit in the test circuit is connected with the power attenuation unit, and the test module is connected with the power attenuation unit, wherein the test circuit is used for detecting whether the signal transmitting unit normally works. The detection efficiency of the conducted disturbance immunity test is improved, meanwhile, the accuracy of the detection result is improved, and the conducted disturbance immunity test work under a complex scene can be dealt with.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram illustrating an anti-interference test system according to an embodiment of the present disclosure;
fig. 2 is a second schematic diagram illustrating a structure of an anti-interference test system according to an embodiment of the disclosure;
FIG. 3 is a third schematic diagram illustrating a third exemplary configuration of an anti-tamper testing system according to an embodiment of the disclosure;
fig. 4 shows a fourth schematic structural diagram of an anti-interference test system according to an embodiment of the present disclosure.
Illustration of the drawings: 100-an anti-interference test system; 110-a host module; 120-a calibration module; 130-a test module; 111-a control unit; 112-a signal transmitting unit; 113-a first coupling unit; 114-a power meter unit; 115-a switching unit; 116-a power attenuation unit; 1121-signal source device; 1122-power amplifier device; 1161-a first power attenuation device; 1162-a second power attenuation device; 121-a load unit; 122-a second coupling unit; 123-ohm conversion unit; 1111-human-computer interaction device; 1112-control motherboard devices; 10-a touch screen; 20-keyboard.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention conventionally put into use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Research shows that in the existing conducted disturbance immunity test process, a large field is often needed to arrange a detection system, auxiliary facilities such as a supporting component and a power supply are needed to be arranged, the test process is complicated and cannot deal with conducted disturbance immunity test work in complex scenes such as narrow environments, the output of a radio frequency signal source needs to be calibrated manually in the test process, reading monitoring of a voltmeter/power meter needs to be carried out, the working condition of a detected device needs to be monitored, time and labor are consumed greatly, and the accuracy of a detection result is low.
Based on above-mentioned research, this disclosure provides an anti-interference test system, host computer module, calibration module and test module, wherein, host computer module includes: the device comprises a control unit, a signal transmitting unit, a first coupling unit, a power meter unit, a switch unit and a power attenuation unit; the control unit is connected with the signal transmitting unit, the switch unit and the power meter unit; the switch unit comprises a first conduction state and a second conduction state; when the anti-interference test system needs to carry out signal calibration, the control unit controls the switch unit to be in a first conduction state, and the signal calibration channel conducts and works; the signal calibration circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a power attenuation unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the power attenuation unit in the signal calibration circuit is connected with a calibration module, the calibration module is used for receiving an interference signal which is output by the signal transmitting unit and attenuated by the power attenuation unit, generating an open-circuit test voltage for calibrating the interference signal, and inputting the open-circuit test voltage to the power attenuation unit; when the anti-interference test system needs to be tested, the control unit controls the switch unit to be in a second conduction state, and the test access is conducted to work; the test circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the first coupling unit in the test circuit is connected with the power attenuation unit, and the test module is connected with the power attenuation unit, wherein the test circuit is used for detecting whether the signal transmitting unit normally works. The detection efficiency of the conducted disturbance immunity test is improved, meanwhile, the accuracy of the detection result is improved, and the conducted disturbance immunity test work under a complex scene can be dealt with.
To facilitate understanding of the present embodiment, a detailed description will be first given of an anti-interference test system method disclosed in the embodiments of the present disclosure.
Referring to fig. 1, a schematic structural diagram of an anti-interference test system 100 according to an embodiment of the present disclosure is shown.
The tamper resistance testing system 100 includes: a host module 110, a calibration module 120, and a test module 130, wherein the host module 110 includes: a control unit 111, a signal transmitting unit 112, a first coupling unit 113, a power meter unit 114, a switching unit 115, and a power attenuation unit 116.
The signal transmitting unit 112, the first coupling unit 113, the switch unit 115, and the power meter unit 114 are sequentially connected; a first input end a of the power attenuation unit 116 is connected to the first coupling unit 113, a first output end B of the power attenuation unit 116 is connected to the calibration module 120, a second input end C of the power attenuation unit 116 is connected to the calibration module 120, and a second output end D of the power attenuation unit 116 is connected to the switching unit 115; the control unit 111 is connected to the signal transmitting unit 112, the switch unit 115, and the power meter unit 114.
Here, when the anti-interference test system 100 needs to perform signal calibration, the control unit 111 controls the switch unit 115 to be in a first conducting state, and a signal calibration path is conducted to operate; the signal calibration path includes the control unit 111, the signal transmitting unit 112, the first coupling unit 113, the power attenuation unit 116, the switch unit 115, and the power meter unit 114, which are sequentially connected in series, and the power attenuation unit 116 in the signal calibration path is connected to the calibration module 120.
Further, when the anti-interference test system 100 needs to perform an anti-interference test on an object to be tested, the control unit 111 controls the switch unit 115 to be in a second conduction state, and the test path is conducted to work; the test path includes the control unit 111, the signal transmitting unit 112, the first coupling unit 113, the switch unit 115, and the power meter unit 114, which are connected in series in sequence. The first coupling unit 113 in the test path is connected to the power attenuation unit 116, and the test module 130 is connected to the power attenuation unit 116.
The calibration module 120 is configured to receive the interference signal output by the signal transmitting unit 112 and attenuated by the power attenuating unit 116, and generate an open circuit test voltage for calibrating the interference signal; the test path is used to detect whether the signal transmitting unit 112 is working normally.
The first coupling unit 113 is configured to enable most of energy of the interference signal output by the signal transmitting unit 112 to flow through the first coupling unit 113, and transmit a small portion of energy to the switching unit 115. The power attenuation unit 116 is configured to attenuate the interference signal passing through the power attenuation unit 116 and the open circuit test voltage based on a preset attenuation ratio. The interfering signal may be a radio frequency signal.
Specifically, the anti-interference test system 100 conducts disturbance to the device to be tested in a manner that the current input end of the device to be tested, such as a power line, a communication line, and the like, is coupled and added with the disturbance signal output by the signal transmitting unit 112, so that a user can observe the working state of the device to be tested under the condition that the conducted disturbance exists, and the anti-interference capability of the device to be tested is determined. Tamper resistant test system 100 includes two modes of operation, one being a calibration mode and the other being a test mode. When the anti-interference test system 100 operates in the calibration mode, the switch unit 115 is in the first conducting state; when anti-tamper test system 100 is operating in the test mode, switch unit 115 is in the second conducting state.
The test module is configured to receive an interference signal, which is output by the signal transmitting unit 112 after calibration and attenuated by the power attenuating unit 116, and complete an anti-interference test on an object to be detected.
Preferably, the test module can adopt a radio frequency conducted disturbance immunity test arrangement mode specified in the national standard GB/T17626.6-2017.
In an actual application process, the calibration mode operates before the test mode, and is used to calibrate, according to the experimental requirements of the user before the anti-interference test, the frequency and the amplitude value of the interference signal that the signal transmitting unit 112 needs to output in the test process, and the control unit 111 stores the output power of the calibration signal transmitting unit 112 at this time. After the calibration of the output power of the signal transmitting unit 112 is completed, the control unit 111 drives the signal transmitting unit 112 to operate with the output power according to the output power of the signal transmitting unit 112 stored in the calibration mode, and at this time, both the frequency and the amplitude of the interference signal output by the signal transmitting unit 112 can meet the requirements of the anti-interference test, and the output of the signal transmitting unit 112 does not need to be manually adjusted and monitored.
The anti-interference test system 100 can be applied to conducted disturbance immunity test under the national standard GB/T17626.6-2017.
Alternatively, the first coupling unit 113 may include a directional coupler, and the switching unit 115 may include a single-pole double-throw relay.
As a possible implementation, the control unit 111 is configured to: controlling the switch unit 115 to be in the first conduction state, adjusting parameters of the interference signal output by the signal transmitting unit 112 at a preset frequency, and storing the calibration output power of the signal transmitting unit 112 when the received open circuit test voltage applied to the calibration module 120 by the interference signal output by the signal transmitting unit 112 is a preset voltage threshold; switching the switch unit 115 from the first conducting state to the second conducting state, adjusting the parameter of the interference signal output by the signal transmitting unit 112 according to the calibration output power, and determining whether the signal transmitting unit normally operates according to the received power count output by the power meter unit 114.
Wherein the parameters of the interfering signal include: the frequency and amplitude values of the interference signal.
Here, when the anti-interference test system 100 operates in the calibration mode, the control unit 111 sends a control signal to the switch unit 115, the control switch unit 115 is in the first conducting state, and sends a control signal to the signal transmitting unit 112, the control signal transmitting unit 112 outputs an interference signal at a certain test frequency within a test frequency range specified in a preset test standard, the interference signal output by the control signal transmitting unit 112 passes through the first coupling unit 113, the power attenuation unit 116, and the calibration module 120 to form an open circuit test voltage, the open circuit test voltage passes through the power attenuation unit 116, enters the power meter unit 114 through the switch unit 115, obtains a corresponding power value after being calculated by the power meter unit 114, and transmits the open circuit test voltage and the corresponding power value to the control unit 111 as a power meter indicator. After receiving the open-circuit test voltage and the corresponding power value transmitted by the power meter unit 114, the control unit 111 compares the open-circuit test voltage and the corresponding power value with a preset voltage threshold corresponding to a preset test standard, if the open-circuit test voltage and the corresponding power value are equal, the calibration operation at the test frequency is completed, and the output power of the signal transmitting unit 112 at the time is recorded as the calibration output power, and if the open-circuit test voltage and the corresponding power value are not equal, the control unit needs to continue to adjust until the open-circuit test voltage transmitted by the power meter unit 114 is equal to the preset voltage threshold. After completing the calibration at the current test frequency, the control unit 111 sends a control signal to the switch unit 115 to shift to the next test frequency, and so on.
Wherein, the test frequency range specified in the preset test standard can be the test frequency range under the national standard GB/T17626.6-2017: 150 kHz-80 MHz. In specific implementation, each calibration process only corresponds to one test frequency, the calibration process can cover the whole frequency range of 150 kHz-80 MHz in a stepping mode, and preferably, the frequency stepping cannot exceed 1%; the test frequency range can also be selected according to the self working condition of the device to be tested: one or more test frequencies within 150 kHz-80 MHz are calibrated.
Here, when the anti-interference test system 100 operates in the test mode, the control unit 111 sends a control signal to the switch unit 115, the control switch unit 115 is switched from the first conduction state to the second conduction state, and sends a control signal to the signal transmitting unit 112, the control signal transmitting unit 112 outputs an interference signal with the calibration output power stored in the calibration mode, at this time, the interference signal enters the switch unit 115 via the first coupling unit 113 and is transmitted to the power meter unit 114, the control unit 111 collects the interference signal transmitted to the power meter unit 114, and monitors whether the signal transmitting unit 112 normally outputs the interference signal, if the operating state of the signal transmitting unit 112 is abnormal, the signal transmitting unit 112 is adjusted in time, so as to ensure that the signal transmitting unit 112 is in the normal operating state.
Optionally, the staying time for the control unit 111 to control the signal transmitting unit 112 to output the interference signal at each test frequency point may be determined according to the running time of the device to be tested, and the shortest staying time is not less than 0.5 s.
Illustratively, see Table 1 below, which is a table comparing the test rating to the open circuit test voltage specified in the national standard GB/T17626.6-2017. If an electronic product needs to perform an anti-interference test with a test level of 1 as a device to be tested, the control unit 111 outputs a control signal to the signal transmitting unit 112 in the calibration process, and controls the signal transmitting unit 112 to output an interference signal until the open-circuit test voltage acquired by the control unit 111 is 120dB (μ V) of an effective value corresponding to the test level 1 in table 1, and the calibration process is completed.
TABLE 1
Like this, in the process of conducting the conducted disturbance immunity test, calibration and test can be automatically completed without carrying out manual adjustment and manual monitoring on the output of the signal transmitting unit 112 aiming at the signal transmitting unit 112, and a worker only needs to observe the working state of a device to be tested, so that the complexity of the conducted disturbance immunity test is reduced, the test efficiency is improved, and higher accuracy is achieved.
The embodiment of the application provides an anti-interference test system, host computer module, calibration module and test module, wherein, host computer module includes: the device comprises a control unit, a signal transmitting unit, a first coupling unit, a power meter unit, a switch unit and a power attenuation unit; the control unit is connected with the signal transmitting unit, the switch unit and the power meter unit; the switch unit comprises a first conduction state and a second conduction state; when the anti-interference test system needs to carry out signal calibration, the control unit controls the switch unit to be in a first conduction state, and the signal calibration channel conducts and works; the signal calibration circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a power attenuation unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the power attenuation unit in the signal calibration circuit is connected with a calibration module, the calibration module is used for receiving an interference signal which is output by the signal transmitting unit and attenuated by the power attenuation unit, generating an open-circuit test voltage for calibrating the interference signal, and inputting the open-circuit test voltage to the power attenuation unit; when the anti-interference test system needs to be tested, the control unit controls the switch unit to be in a second conduction state, and the test access is conducted to work; the test circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the first coupling unit in the test circuit is connected with the power attenuation unit, and the test module is connected with the power attenuation unit, wherein the test circuit is used for detecting whether the signal transmitting unit normally works. The detection efficiency of the conducted disturbance immunity test is improved, meanwhile, the accuracy of the detection result is improved, and the conducted disturbance immunity test work under a complex scene can be dealt with.
Referring to fig. 2, a second schematic structural diagram of an anti-tamper testing system 100 according to an embodiment of the disclosure is shown.
The tamper resistance testing system 100 includes: a host module 110, a calibration module 120, and a test module 130, wherein the host module 110 includes: a control unit 111, a signal transmitting unit 112, a first coupling unit 113, a power meter unit 114, a switching unit 115, and a power attenuation unit 116. The signal transmitting unit 112 includes: a signal source device 1121 and a power amplification device 1122. The power attenuation unit 116 includes: a first power attenuation device 1161 and a second power attenuation device 1162.
The signal source device 1121 is connected to the power amplifier device 1122, and the power amplifier device 1122 is connected to the first coupling unit 113; the input end of the first power attenuation device 1161 is used as the first input end a of the power attenuation unit 116, and is connected to the first coupling unit 113; the output terminal of the first power attenuation device 1161 serves as the first output terminal B of the power attenuation unit 116.
Here, when the anti-interference test system 100 needs to perform calibration, the first output terminal B of the power attenuation unit 116 is connected to the calibration module 120; the input terminal of the second power attenuation device 1162 is used as the second input terminal C of the power attenuation unit 116, and is connected to the calibration module 120; an output terminal of the second power attenuation device 1162 is used as a second output terminal D of the power attenuation unit 116, and is connected to the switch unit 115.
Further, when the anti-interference test system 100 needs to perform a test, the first output terminal B of the power attenuation unit 116 is connected to the test module 130 as a signal output terminal of the host module 110, and inputs an interference signal to the test module 130.
Here, the signal source device 1121 is configured to generate the interference signal; the power amplifying device 1122 is configured to amplify a voltage value of the interference signal generated by the signal source device 1121. The first power attenuation device 1161 is configured to attenuate, according to a preset first attenuation ratio, power of an interference signal input to the calibration module 120 or the test module 130 by the signal transmitting unit 112; the second power attenuation device 1162 is configured to attenuate, according to a preset second attenuation ratio, power input to the switch unit 115 after the interference signal passes through the calibration module 120.
Here, since it is difficult for the general signal source device 1121 to directly satisfy the voltage value required for the high test level, the power amplification device 1122 needs to be provided to amplify the interference signal output by the signal source device 1121 so as to satisfy the voltage value required for the high test level.
The first attenuation ratio and the second attenuation ratio may be set according to actual conditions, and are not limited specifically herein. The signal source device 1121 may be a radio frequency signal source.
Preferably, the first power attenuating device 1161 may be an attenuator of 6dB, and the second power attenuating device 1162 may be an attenuator of 10 dB.
Referring to fig. 3, a third schematic structural diagram of an interference immunity test system 100 according to an embodiment of the present disclosure is shown.
The tamper resistance testing system 100 includes: a host module 110, a calibration module 120, and a test module 130, wherein the host module 110 includes: a control unit 111, a signal transmitting unit 112, a first coupling unit 113, a power meter unit 114, a switching unit 115, and a power attenuation unit 116. The signal transmitting unit 112 includes: a signal source device 1121 and a power amplification device 1122. The power attenuation unit 116 includes: a first power attenuation device 1161 and a second power attenuation device 1162. The calibration module 120 includes: a load unit 121, a second coupling unit 122, and an ohmic transformation unit 123.
Here, the load unit 121, the second coupling unit 122, and the ohmic transformation unit 123 are sequentially connected. The second coupling unit 122 is connected to the power attenuation unit 116, and the ohmic conversion unit 123 is connected to the power attenuation unit 116.
Specifically, the second coupling unit 122 is connected to a first power attenuation device 1161 in the power attenuation unit 116, and the ohmic conversion unit 123 is connected to a second power attenuation device 1162 in the power attenuation unit 116.
Wherein, the load unit 121 may include a 150-50ohm converter and a 50ohm load; the ohmic transformation unit 123 may comprise a 150-50ohm transformer.
As a possible implementation manner, when the anti-interference test system 100 is in the test mode, the second coupling unit 122 may be connected to a power input terminal of a device to be tested in the test module 130; in this connection manner, the second coupling unit 122 is configured to couple the interference signal output by the signal transmitting unit 112 to an input power signal of a device to be tested, and is configured to generate signal interference for the device to be tested, so as to test the anti-interference capability of the device to be tested.
Referring to fig. 4, a fourth schematic view of a structure of an anti-interference test system 100 according to an embodiment of the disclosure is shown.
The tamper resistance testing system 100 includes: a host module 110, a calibration module 120, and a test module 130, wherein the host module 110 includes: a control unit 111, a signal transmitting unit 112, a first coupling unit 113, a power meter unit 114, a switching unit 115, and a power attenuation unit 116. The signal transmitting unit 112 includes: a signal source device 1121 and a power amplification device 1122. The power attenuation unit 116 includes: a first power attenuation device 1161 and a second power attenuation device 1162. The calibration module 120 includes: a load unit 121, a second coupling unit 122, and an ohmic transformation unit 123. The control unit 111 includes: a human-computer interaction device 1111 and a control motherboard device 1112. The human-computer interaction device 1111 includes a touch screen 10 and a keyboard 20.
The human-computer interaction device 1111 is connected with the control mainboard device 1112; the control main board device 1112 is connected to the signal transmitting unit 112, the switch unit 115, and the power meter unit 114; the touch screen 10 is connected with the control main board device 1112; the keyboard 20 is connected to the control board device 1112.
Here, the human-computer interaction device 1111 is configured to collect test parameters input by a user; the control main board device 1112 is configured to control the on state of the switch unit 115 and the parameters of the interference signal output by the signal transmitting unit 112 according to the test parameters.
As a possible implementation, the touch screen 10 is installed on the front panel of the host module 110, and is connected to the control motherboard device 1112 through a (Low Voltage Differential Signaling, LVDS) interface; the keyboard 20 is disposed on the front panel of the host module 110, and is connected to the control board device 1112 through a Universal Serial Bus (USB) interface.
Optionally, the control main board device 1112 is loaded with an android system, and may read the power indication calculated by the power meter unit 114 and control the on-state of the switch unit 115 according to user setting.
The embodiment of the application provides an anti-interference test system, host computer module, calibration module and test module, wherein, host computer module includes: the device comprises a control unit, a signal transmitting unit, a first coupling unit, a power meter unit, a switch unit and a power attenuation unit; the control unit is connected with the signal transmitting unit, the switch unit and the power meter unit; the switch unit comprises a first conduction state and a second conduction state; when the anti-interference test system needs to carry out signal calibration, the control unit controls the switch unit to be in a first conduction state, and the signal calibration channel conducts and works; the signal calibration circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a power attenuation unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the power attenuation unit in the signal calibration circuit is connected with a calibration module, the calibration module is used for receiving an interference signal which is output by the signal transmitting unit and attenuated by the power attenuation unit, generating an open-circuit test voltage for calibrating the interference signal, and inputting the open-circuit test voltage to the power attenuation unit; when the anti-interference test system needs to be tested, the control unit controls the switch unit to be in a second conduction state, and the test access is conducted to work; the test circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a switch unit and a power meter unit which are sequentially connected in series, wherein the first coupling unit in the test circuit is connected with the power attenuation unit, and the test module is connected with the power attenuation unit, wherein the test circuit is used for detecting whether the signal transmitting unit normally works. The detection efficiency of the conducted disturbance immunity test is improved, meanwhile, the accuracy of the detection result is improved, and the conducted disturbance immunity test work under a complex scene can be dealt with.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An anti-tamper testing system, comprising: host computer module, calibration module and test module, wherein, the host computer module includes: the device comprises a control unit, a signal transmitting unit, a first coupling unit, a power meter unit, a switch unit and a power attenuation unit;
the control unit is connected with the signal transmitting unit, the switch unit and the power meter unit; the switch unit comprises a first conduction state and a second conduction state;
when the anti-interference test system needs to carry out signal calibration, the control unit controls the switch unit to be in a first conduction state, and a signal calibration channel is conducted to work;
the signal calibration path comprises the control unit, the signal transmitting unit, the first coupling unit, the power attenuation unit, the switch unit and the power meter unit which are sequentially connected in series, the power attenuation unit in the signal calibration path is connected with the calibration module, the calibration module is used for receiving an interference signal which is output by the signal transmitting unit and attenuated by the power attenuation unit, generating an open-circuit test voltage for calibrating the interference signal, and inputting the open-circuit test voltage to the power attenuation unit;
when the anti-interference test system needs to be tested, the control unit controls the switch unit to be in a second conduction state, and a test access is conducted to work;
the test circuit comprises a control unit, a signal transmitting unit, a first coupling unit, a switch unit and a power meter unit which are sequentially connected in series, the first coupling unit in the test circuit is connected with the power attenuation unit, the test module is connected with the power attenuation unit, and the test circuit is used for detecting whether the signal transmitting unit normally works or not.
2. The tamper-resistant testing system of claim 1, wherein:
in the signal calibration path, an interference signal output by the signal transmitting unit passes through the first coupling unit, the power attenuation unit and the calibration module to form an open-circuit test voltage, and the open-circuit test voltage is sent to the power meter unit through the power attenuation unit and the switch unit;
in the test access, an interference signal output by the signal transmitting unit is sent to the power meter unit through the first coupling unit and the switch unit so as to detect whether the signal transmitting unit works normally.
3. The tamper-resistant test system of claim 1, wherein the control unit is configured to:
controlling the switch unit to be in the first conduction state, adjusting parameters of the interference signal output by the signal transmitting unit under a preset frequency, and storing the calibration output power of the signal transmitting unit when the received open circuit test voltage of the interference signal output by the signal transmitting unit acting on the calibration module is a preset voltage threshold;
and switching the switch unit from the first conduction state to the second conduction state, adjusting parameters of the interference signal output by the signal transmitting unit according to the calibration output power, and determining whether the signal transmitting unit normally works according to the received power counting number output by the power counting unit.
4. The tamper-resistant testing system of claim 1, wherein the signal transmitting unit comprises a signal source device and a power amplification device,
the signal source device is connected with the power amplifier device, and the power amplifier device is connected with the first coupling unit;
the signal source device is used for generating the interference signal;
the power amplifying device is used for amplifying the voltage value of the interference signal generated by the signal source device.
5. The tamper-resistant testing system of claim 1, wherein the control unit comprises a human-computer interaction device and a control motherboard device;
the human-computer interaction device is connected with the control main board device;
the control main board device is connected with the signal transmitting unit, the switch unit and the power meter unit;
the human-computer interaction device is used for collecting test parameters input by a user;
the control mainboard device is used for controlling the conduction state of the switch unit and the parameters of the interference signals output by the signal transmitting unit according to the test parameters.
6. The immunity testing system of claim 1, wherein said power attenuation unit includes a first power attenuation device and a second power attenuation device;
the first power attenuation device is used for attenuating the power of the interference signal input to the calibration module or the test module by the signal transmitting unit according to a preset first attenuation proportion;
the second power attenuation device is used for attenuating the power input to the switch unit after the interference signal passes through the calibration module according to a preset second attenuation proportion;
the input end of the first power attenuation device is used as the first input end of the power attenuation unit and is connected with the first coupling unit; the output end of the first power attenuation device is used as the first output end of the power attenuation unit;
when the anti-interference test system needs to perform signal calibration, the first output end of the power attenuation unit is connected with the calibration module; the input end of the second power attenuation device is used as the second input end of the power attenuation unit and is connected with the calibration module; the output end of the second power attenuation device is used as a second output end of the power attenuation unit and is connected with the switch unit;
when the anti-interference test system needs to be tested, the first output end of the power attenuation unit is used as the signal output end of the host module and connected with the test module, and interference signals are input into the test module.
7. The tamper-resistant test system of claim 1, wherein the calibration module comprises: the load unit, the second coupling unit and the ohm conversion unit;
the load unit, the second coupling unit and the ohm conversion unit are sequentially connected;
the second coupling unit is connected with the power attenuation unit, and the ohm conversion unit is connected with the power attenuation unit.
8. The tamper-resistant testing system of claim 7, wherein:
the second coupling unit is connected to a power input end of the device to be tested;
the second coupling unit is used for coupling the interference signal output by the signal transmitting unit to an input power supply signal of a device to be tested, and is used for generating signal interference aiming at the device to be tested so as to test the anti-interference capability of the device to be tested.
9. The tamper-resistant testing system of claim 5, wherein the human interaction device comprises a touch screen and a keyboard;
the touch screen is connected with the control main board device;
the keyboard is connected with the control main board device.
10. The tamper-resistant testing system of claim 1, wherein:
the interference signal output by the signal transmitting unit is a radio frequency signal.
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| CN202123152999.6U CN216595345U (en) | 2021-12-14 | 2021-12-14 | Anti-interference test system |
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| CN202123152999.6U CN216595345U (en) | 2021-12-14 | 2021-12-14 | Anti-interference test system |
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