Radio frequency signal interference test system and method

Abstract

The present application provides a radio frequency signal interference test system and method, which relates to the field of communication technology. The system includes: a shielding box, a device to be tested and a control terminal; wherein the device to be tested includes: a radio frequency communication module, a processor and at least one circuit to be tested, and the processor is connected to each circuit to be tested; the radio frequency communication module is connected to the control terminal for receiving control instructions sent by the control terminal; the processor is also connected to the control terminal for obtaining the machine code generated by the processor after converting the output signal of the circuit to be tested, and judging whether the circuit to be tested can tolerate radio frequency signal interference according to the machine code. In this system, the control terminal obtains the machine code generated by the processor after converting the output signal of the circuit to be tested, so as to judge whether the circuit to be tested can tolerate radio frequency signal interference, so that the circuit module with weak design in the circuit to be tested can be simply and quickly located, thereby improving the efficiency of radio frequency signal interference testing.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a radio frequency signal interference testing system and method. Background Art

[0002] With the development of science and technology, communication, electricity, a large number of equipment operations and transportation have brought artificial electromagnetic interference, making the problem of electromagnetic interference more and more prominent, and has become an obstacle to the normal functioning of many equipment and systems. In the information age, radio frequency signal interference, which poses a serious threat to information equipment, has attracted much attention.

[0003] Currently, the existing test methods for evaluating the interference of RF signals on other circuits inside the device under test are usually to conduct the test in a completely shielded darkroom, or to measure the interference of RF signals using a spectrum analyzer in an open environment.

[0004] However, with existing technologies, darkroom costs are high and spectrum analyzers can only roughly lock onto interference sources, resulting in low efficiency and high costs in evaluating the interference of RF signals on the internal circuits of the device under test. Summary of the invention

[0005] The object of the present invention is to provide a radio frequency signal interference testing system and method to improve the efficiency of testing the interference of radio frequency signals on the internal circuit of a device under test, in view of the above-mentioned deficiencies in the prior art.

[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0007] In a first aspect, an embodiment of the present application provides a radio frequency signal interference test system, the radio frequency signal interference test system comprising: a shielding box, a device to be tested arranged in the shielding box, and a control terminal arranged outside the shielding box; wherein the device to be tested comprises: a radio frequency communication module, a processor and at least one circuit to be tested, the processor being connected to each circuit to be tested;

[0008] The radio frequency communication module is communicatively connected to the control terminal to receive control instructions sent by the control terminal; the processor is also communicatively connected to the control terminal so that the control terminal obtains the machine code generated after the processor converts the output signal of the circuit under test, and determines whether the circuit under test can tolerate interference from the radio frequency signal based on the machine code.

[0009] Optionally, the shielding box comprises: a shielding box body, a hinge door arranged above the shielding box body, and a through hole arranged on the side; wherein the shielding box body is used to place the device to be tested;

[0010] The hinged door above the shielding box is used for taking and placing the device under test; the through hole is used to lead multiple leads in the device under test out of the shielding box through the through hole, and the gaps in the through hole after the leads are led out are shielded with shielding materials.

[0011] Optionally, each of the plurality of leads is wrapped with insulating material at a position close to the through hole.

[0012] Optionally, the radio frequency signal interference testing system further includes: an oscilloscope;

[0013] The output end of each circuit to be tested is also electrically connected to the oscilloscope so that the oscilloscope displays the waveform changes of the output signal of each circuit to be tested.

[0014] Optionally, the at least one circuit under test includes: an analog input voltage circuit; wherein the radio frequency signal interference test system further includes a first power supply and a second power supply; the device under test further includes: a power supply circuit;

[0015] The first power supply is electrically connected to the power supply circuit, and the power supply circuit is electrically connected to the power supply terminals of the radio frequency communication module, the processor and the at least one circuit to be tested, respectively, for supplying power to the radio frequency communication module, the processor and the at least one circuit to be tested;

[0016] The second power supply is electrically connected to the input terminal of the analog input voltage circuit, and is used to provide an input voltage signal to the analog input voltage circuit;

[0017] The control terminal is used to obtain the machine code generated by the processor after converting the output signal of the analog input voltage circuit, and determine whether the analog input voltage circuit can tolerate radio frequency signal interference.

[0018] Optionally, the at least one circuit to be tested further includes: an analog input current circuit; the second power supply is also electrically connected to an input end of the analog input current circuit via a preset resistor to provide an input current signal to the analog input current circuit;

[0019] The control terminal is further used to obtain the machine code generated by the processor after converting the output signal of the analog input current circuit, and determine whether the analog input current circuit can tolerate radio frequency signal interference.

[0020] Optionally, the at least one circuit to be tested further includes: a pulse width modulation (PWM) circuit;

[0021] The preset solenoid valve is electrically connected to the output end of the PWM circuit to drive the preset solenoid valve;

[0022] The control terminal is further used to obtain the machine code generated by the processor after converting the output signal of the PWM circuit, and determine whether the PWM circuit can tolerate radio frequency signal interference.

[0023] Optionally, the radio frequency communication module is connected to the control terminal via a serial port communication; the processor is connected to the control terminal via a CAN (Controller Area Network) bus.

[0024] Optionally, the radio frequency communication module is any one of the following communication modules: a mobile network communication module, a global positioning system GPS (Global Positioning System) communication module, a wireless fidelity WiFi (Wireless-Fidelity) communication module, and a Bluetooth communication module.

[0025] In a second aspect, an embodiment of the present application further provides a radio frequency signal interference test method, the method being applied to a control terminal in any one of the radio frequency signal interference tests provided in the first aspect above, the method comprising:

[0026] The control terminal sends a control instruction to the radio frequency communication module, so that the radio frequency communication module performs a corresponding operation under the control instruction;

[0027] The control terminal obtains a machine code generated by the processor after converting an output signal of the circuit under test, and determines whether the circuit under test can tolerate interference from a radio frequency signal according to the machine code.

[0028] Optionally, the control instruction is: an open instruction, a close instruction, a frequency band adjustment instruction, a channel adjustment instruction or a power adjustment instruction; wherein, the open instruction is used to control the RF communication module to perform an open operation, the close instruction is used to control the RF communication module to perform a close operation, the frequency band adjustment instruction is used to control the RF communication module to adjust the frequency band, the channel adjustment instruction is used to control the RF communication module to adjust the channel, and the power adjustment instruction is used to control the RF communication module to adjust the transmission power.

[0029] In the third aspect, an embodiment of the present application also provides a radio frequency signal interference testing device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores program instructions executable by the processor, and when the radio frequency signal interference testing device is running, the processor communicates with the storage medium through the bus, and the processor executes the program instructions to perform the steps of the radio frequency signal interference testing method described in the second aspect above.

[0030] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the radio frequency signal interference testing method described in the second aspect above are executed.

[0031] The beneficial effects of this application are:

[0032] The radio frequency signal interference test system and method provided in the present application, the radio frequency signal interference test system includes: a shielding box, a device to be tested arranged in the shielding box, and a control terminal arranged outside the shielding box; wherein the device to be tested includes: a radio frequency communication module, a processor and at least one circuit to be tested, and the processor is connected to each circuit to be tested; the radio frequency communication module is communicatively connected to the control terminal to receive control instructions sent by the control terminal; the processor is also communicatively connected to the control terminal so that the control terminal obtains the machine code generated by the processor after converting the output signal of the circuit to be tested, and determines whether the circuit to be tested is tolerant to the interference of the radio frequency signal according to the machine code. In the scheme of the present application, the machine code generated by the processor after converting the output signal of the circuit to be tested is obtained by the control terminal, and whether the circuit to be tested is tolerant to the interference of the radio frequency signal is determined according to the machine code, so that the circuit module with weak design in the circuit to be tested can be simply and quickly located through the radio frequency signal interference test system, and targeted improvements can be made, thereby improving the efficiency of radio frequency signal interference testing.

[0033] In addition, the RF signal interference test system also includes: an oscilloscope; the output end of each circuit under test is also electrically connected to the oscilloscope so that the oscilloscope displays the waveform changes of the output signal of each circuit under test, thereby improving the accuracy of the RF signal interference test on the device under test.

[0034] Finally, the RF communication module is any of the following communication modules: mobile network communication module, GPS communication module, WiFi communication module, Bluetooth communication module. In this way, the RF signal interference test system provided in the present application can also be used to test the radiation interference of various RF signals on various circuits inside the device to be tested, thereby improving the practicality and versatility of the RF signal interference test system, simplifying the complexity of the test, and thereby improving the efficiency of the RF signal interference test. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1A schematic diagram of the structure of a radio frequency signal interference testing system provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the structure of a shielding box in a radio frequency signal interference test system provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application;

[0041] Figure 6 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application;

[0042] Figure 7 A flowchart of a radio frequency signal interference testing method provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the structure of a radio frequency signal interference testing device provided in an embodiment of the present application;

[0044] Fig. 9 A schematic diagram of the structure of a control terminal provided in an embodiment of the present application.

[0045] Icons: 100-RF signal interference test system; 101-shielding box; 102-device under test; 103-control terminal; 104-RF communication module; 105-processor; 106-circuit under test; 201-shielding box; 202-hinge door; 203-through hole; 301-oscilloscope; 401-analog input voltage circuit; 402-first power supply; 403-second power supply; 404-power supply circuit; 501-analog input current circuit; 502-resistance; 601-PWM circuit; 602-solenoid valve. DETAILED DESCRIPTION

[0046] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0047] Figure 1 This is a schematic diagram of the structure of a radio frequency signal interference test system 100 provided in an embodiment of the present application; it can be understood that Figure 1 The structure shown is for illustration only. The RF signal interference test system 100 may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown. Figure 1 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0048] like Figure 1 As shown, the radio frequency signal interference test system 100 includes: a shielding box 101 , a device to be tested 102 disposed in the shielding box 101 , and a control terminal 103 disposed outside the shielding box 101 .

[0049] The device under test 102 includes: a radio frequency communication module 104 , a processor 105 (Central Processing Unit, CPU for short) and at least one circuit under test 106 , and the processor 105 is in communication connection with each circuit under test 106 .

[0050] The RF communication module 104 is connected to the control terminal 103 for receiving control instructions sent by the control terminal 103; the processor 105 is also connected to the control terminal 103 for enabling the control terminal 103 to obtain the machine code generated by the processor 105 after converting the output signal of the circuit under test 106, and determine whether the circuit under test 106 can tolerate the interference of the RF signal based on the machine code.

[0051] For details, please refer to Figure 1As shown, before the RF signal interference test is started, the device under test 102 is first placed in the shielding box 101, the serial port signal of the RF communication module 104 inside the device under test 102 is disconnected from the processor 105, and the serial port signal of the RF communication module 104 is led out of the shielding box 101 with a wire. The wire can be a thin copper wire, which is not limited here, and the wire can also be labeled with a name to prevent confusion with other conductive circuits. Then, the control terminal 103 arranged outside the shielding box 101 is used to communicate with the RF communication module 104, so that the RF communication module 104 can receive the control instruction sent by the control terminal 103. The control instruction can be to turn on or off the RF communication module 104, or to adjust the frequency band, channel and transmission power of the RF communication module 104. For example, in the AT+QRFTEST=\"GSM900\",15,\"ON\",0,3300\r\n instruction, QRFTEST corresponds to TX (transmit) mode, GSM900 represents the GSM900 frequency band of 2G, 15 is the channel, and the GSM900 corresponding channel range is 0-124, with a total of 125 channels. One of the channels can be arbitrarily selected for testing, and 3300 corresponds to the transmission power size. In this way, the radiation interference of RF signals in remote areas on the device under test 102 can be fully simulated, so that the accuracy of RF signal interference on the device under test 102 can be ensured.

[0052] For example, when the radio frequency communication module 104 is a GPRS (General Packet Radio Service) communication module, the GPRS communication module can be turned on by sending a command through the serial port software in the control terminal 103, and the interference of each channel of the 2G, 3G, and 4G frequency bands to each circuit to be tested 106 can be tested in turn. The transmission power of each channel can also be adjusted to the maximum. It should be noted that when the GPRS signal is weak in remote areas, the GPRS module will adaptively adjust its transmission signal to the maximum.

[0053] However, it is not necessary to disconnect each circuit under test 106 inside the device under test 102 from the processor 105, that is, each circuit under test 106 is communicatively connected to the processor 105, and the processor 105 communicates with the control terminal, so that the output signal of the circuit under test 106 can be converted and processed by the processor 105 to generate a machine code, and the machine code is sent to the control terminal 103, and then, it is determined whether the circuit under test 106 can tolerate the interference of the radio frequency signal based on the machine code.

[0054] In this embodiment, for example, the LM (Linguistics Model) software installed in the control terminal 103 can be used to monitor the jump range of the ADC (Analog-to-Digital Converter) value of the output signal of the circuit under test 106 after being converted by the analog-to-digital conversion chip in the processor 105, and other software can also be used to monitor the jump range of the machine code in real time, so as to judge whether the circuit under test 106 can tolerate the interference of the radio frequency signal according to the jump range of the machine code. If the jump range of the ADC value does not exceed the preset range, it is judged that the circuit under test 106 can tolerate the interference of the radio frequency signal, and vice versa. This makes it possible to simply and quickly locate the circuit modules with weak designs in the circuit under test 106 through the radio frequency signal interference test system 100, and make targeted improvements, thereby improving the efficiency of the radio frequency signal interference test.

[0055] In summary, an embodiment of the present application provides a radio frequency signal interference test system, which includes: a shielding box, a device to be tested arranged in the shielding box, and a control terminal arranged outside the shielding box; wherein the device to be tested includes: a radio frequency communication module, a processor and at least one circuit to be tested, and the processor is connected to each circuit to be tested; the radio frequency communication module is communicatively connected to the control terminal to receive control instructions sent by the control terminal; the processor is also communicatively connected to the control terminal so that the control terminal obtains the machine code generated by the processor after converting the output signal of the circuit to be tested, and determines whether the circuit to be tested is tolerant to the interference of the radio frequency signal according to the machine code. In this system, the machine code generated by the processor after converting the output signal of the circuit to be tested is obtained through the control terminal, and the machine code is determined whether the circuit to be tested is tolerant to the interference of the radio frequency signal according to the machine code, so that the circuit module with weak design in the circuit to be tested can be simply and quickly located through the radio frequency signal interference test system, and targeted improvements can be made, thereby improving the efficiency of the radio frequency signal interference test.

[0056] Figure 2 A schematic diagram of the structure of a shielding box in a radio frequency signal interference test system provided in an embodiment of the present application; Figure 2 As shown, the shielding box 101 includes: a shielding box body 201, a hinge door 202 arranged on the top of the shielding box body, and a through hole 203 arranged on the side; wherein, the shielding box body 201 is used to place the device under test 102.

[0057] In this embodiment, for example, the size of the shielding box 101 needs to be larger than the size of the device under test 102. For example, it can be a 350mm*300mm*100mm closed box, and a 300mm*250mm hinge door 202 is opened on the top of the shielding box 101, and a through hole 203 with a diameter of 10mm is opened on the side of the shielding box 101.

[0058] It should be noted that the shielding box 101 can also be designed in other structural forms, for example, the entire top cover of the shielding box 101 can be used as the hinge door 202. Optionally, the shielding box 101 can also be made of steel plate or aluminum alloy, etc., without specific restrictions, so that the manufacturing cost of the shielding box 101 is low.

[0059] The hinged door 202 on the top of the shielding box is used to take in and place the device under test 102, the through hole is used to lead multiple leads in the device under test 102 out of the shielding box 101 through the wire harness, and the gaps in the through hole 203 after the leads are led out are shielded with shielding materials.

[0060] Specifically, in the preparation stage of the RF signal interference test, the hinged door 202 is opened, and the device under test 102 is placed inside the shielding box 201, and then each circuit module of the device under test 102 is connected to the corresponding lead wire, and multiple lead wires are led out of the shielding box 101 through the through hole 203, and then the multiple lead wires are respectively connected to the corresponding external devices. For example, the lead wires led out of the RF communication module 104 in the device under test 102 through the through hole 203 are connected to the control terminal 103 outside the shielding box 101, and the device under test 102 is connected to the control terminal 103 outside the shielding box 101. The leads of the processor 105 in the device 102 through the through hole 203 are also connected to the control terminal 103 outside the shielding box 101. The names of the input and output signal leads can also be marked to complete the placement of the device under test 102 and close the hinge door 202. Finally, after threading the through hole 203, the excess gaps are shielded with aluminum foil so that the device under test 102 is completely in the shielding box. This can simulate the situation where the RF communication module 104 receives weak signals in remote areas, thereby improving the accuracy of the RF signal interference test.

[0061] Optionally, each of the multiple leads is wrapped with insulating material near the through hole 203. For example, the end of the lead wire can be wrapped with insulating tape to prevent short circuits between the wires and between the wires and the casing of the shielding box 101 after the device under test 102 is powered on.

[0062] Figure 3 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application; Figure 3 As shown, the radio frequency signal interference test system further includes: an oscilloscope 301 ; the output end of each circuit under test 106 is also electrically connected to the oscilloscope 301 , so that the oscilloscope 301 displays the waveform changes of the output signal of each circuit under test 106 .

[0063] For example, in this embodiment, the oscilloscope 301 is also arranged outside the shielding box 101, and the wire corresponding to the output end of each circuit under test 106 led out from the through hole 203 is clamped by the probe of the oscilloscope 301, so that the output end of each circuit under test 106 can also be electrically connected to the oscilloscope 301, and the waveform changes of the output signal of each circuit under test 106 are displayed by the oscilloscope 301, so that the tester can determine whether each circuit under test 106 can tolerate the interference of radio frequency signals by observing the waveform changes displayed by the oscilloscope 301, thereby improving the accuracy of radio frequency signal interference testing on the device under test 102.

[0064] Figure 4 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application; Figure 4 As shown, at least one circuit under test 106 includes: an analog input voltage circuit 401 (Analog Input Voltage, also referred to as AIV); wherein the RF signal interference test system 100 also includes a first power supply 402 and a second power supply 403; the device under test 102 also includes: a power supply circuit 404.

[0065] Among them, the first power supply 402 is electrically connected to the power supply circuit 404, and the power supply circuit 404 is respectively electrically connected to the power supply ends of the RF communication module 104, the processor 105 and at least one circuit under test 106, and is used to power the RF communication module 104, the processor 105 and at least one circuit under test 106 to ensure that the device under test 102 can operate normally.

[0066] The second power supply 403 is electrically connected to the input terminal of the analog input voltage circuit 401 , and is used to provide an input voltage signal to the analog input voltage circuit 401 .

[0067] The control terminal 103 is used to obtain the machine code generated by the processor 105 after converting the output signal of the analog input voltage circuit 401, so that it is possible to determine whether the analog input voltage circuit 401 can tolerate interference from radio frequency signals based on the machine code, and it is also possible to determine whether the analog input voltage circuit 401 can tolerate interference from radio frequency signals by observing the changes in the waveform displayed by the oscilloscope 301.

[0068] Table 1

[0069]

[0070] Table 1 is a test result of an analog input voltage circuit in a radio frequency signal interference test system provided in this embodiment. In this embodiment, for example, a corresponding test is performed in the 2G signal frequency band to input a series of voltage change signals to the analog input voltage circuit 401 through the second power supply 403, and the corresponding machine code generated after the processor 105 converts and processes the output signal of the analog input voltage circuit 401 is obtained through the control terminal 103, and the jump range of the machine code is monitored by the LM software to determine whether the analog input voltage circuit 401 is tolerant to radio frequency signal interference. If the jump range of the machine code does not exceed the preset value, it can be determined that the analog input voltage circuit 401 is tolerant to radio frequency signal interference; if the jump range of the machine code exceeds the preset value, it can be determined that the analog input voltage circuit 401 is intolerant to radio frequency signal interference.

[0071] Optionally, a series of voltage change signals input to the analog input voltage circuit 401 and the corresponding acquired machine code can be plotted into a function curve, and the function curve can be observed to see whether there is a jump or discontinuity. If a jump occurs, it can be determined that the analog input voltage circuit 401 is intolerant to radio frequency signal interference, and vice versa. This will not be repeated.

[0072] Optionally, when the RF communication module 104 is turned off, that is, there is no RF signal transmission interference, the machine code obtained by the control terminal 103 and the waveform displayed by the oscilloscope are compared to comprehensively determine whether the analog input voltage circuit 401 can tolerate RF signal interference.

[0073] Figure 5 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application; Figure 5 As shown, at least one circuit to be tested 106 also includes: an analog input current circuit 501 (Analog Input Current, referred to as AII); the second power supply 403 is also electrically connected to the input end of the analog input current circuit 501 through a preset resistor 502 to provide an input current signal to the analog input current circuit 501.

[0074] The control terminal 103 is also used to obtain the machine code generated by the processor 105 after converting the output signal of the analog input current circuit 501, and determine whether the analog input current circuit 501 can tolerate the interference of the radio frequency signal based on the machine code. It can also determine whether the analog input current circuit 501 can tolerate the interference of the radio frequency signal by observing the waveform changes displayed by the oscilloscope 301.

[0075] Table 2 is a test result of an analog input current circuit in a radio frequency signal interference test system provided in this embodiment. In this embodiment, for example, a corresponding test is performed in the 2G signal frequency band to input a series of current change signals to the analog input current circuit 501 through the second power supply 403 and the preset resistor 502, and the corresponding machine code generated by the processor 105 after converting the output signal of the analog input current circuit 501 is obtained through the control terminal 103, and the jump range of the machine code is monitored by the LM software to determine whether the analog input current circuit 501 is tolerant to radio frequency signal interference. If the jump range of the machine code does not exceed the preset value, it can be determined that the analog input current circuit 501 is tolerant to radio frequency signal interference; if the jump range of the machine code exceeds the preset value, it can be determined that the analog input current circuit 501 is intolerant to radio frequency signal interference.

[0076] Table 2

[0077]

[0078] Optionally, a series of current change signals input to the analog input current circuit 501 and the corresponding acquired machine code can be plotted into a function curve, and the function curve can be observed to see whether there is a jump or discontinuity. If a jump occurs, it can be determined that the analog input current circuit 501 is intolerant to radio frequency signal interference, and vice versa. This will not be repeated.

[0079] Optionally, when the RF communication module 104 is turned off, that is, there is no RF signal transmission interference, the machine code obtained by the control terminal 103 and the waveform displayed by the oscilloscope are compared to comprehensively determine whether the analog input current circuit 501 can tolerate RF signal interference.

[0080] Figure 6 A schematic diagram of the structure of another radio frequency signal interference testing system provided in an embodiment of the present application; Figure 6 As shown, at least one circuit to be tested further includes: a PWM circuit 601 ; a preset solenoid valve 602 electrically connected to an output end of the PWM circuit to drive the solenoid valve 602 .

[0081] The control terminal 103 is also used to obtain the machine code generated by the processor 105 after converting the output signal of the PWM circuit, and monitor the range of machine code jumps through LM software to determine whether the PWM circuit can tolerate interference from radio frequency signals. The output end of the PWM circuit can also be electrically connected to the oscilloscope 301 at the same time, and the waveform changes displayed by the oscilloscope 301 can be observed to determine whether the PWM circuit 601 can tolerate interference from radio frequency signals.

[0082] Optionally, when the RF communication module 104 is turned off, that is, there is no RF signal transmission interference, the machine code obtained by the control terminal 103 and the waveform displayed by the oscilloscope are compared to comprehensively determine whether the PWM circuit 601 can tolerate RF signal interference.

[0083] Optionally, the radio frequency communication module 104 is connected to the control terminal 103 by serial communication; the processor 105 is connected to the control terminal 103 by communication via a local area network controller CAN bus.

[0084] Optionally, the radio frequency communication module 104 is any one of the following communication modules: a mobile network communication module, a GPS communication module, a WiFi communication module, and a Bluetooth communication module.

[0085] Among them, the mobile network communication module can be a GPRS communication module, that is, the RF signal interference test system 100 can be used to test the interference of the GPRS communication module on the internal circuit of the device under test 102; and the RF signal interference test system 100 can also be used to test the interference of the GPS communication module, WiFi communication module, and Bluetooth communication module on the internal circuit of the device under test 102. In this way, the RF signal interference test system 100 provided in the present application can be used to test the radiation interference of various RF signals on various circuits inside the device under test 102, thereby improving the practicality and versatility of the RF signal interference test system, simplifying the complexity of the test, and thereby improving the efficiency of the RF signal interference test.

[0086] The above describes the RF signal interference testing system provided by the present application through multiple embodiments. The following describes the RF signal interference testing method implemented based on the RF signal interference testing system. The implementation principles of the steps involved in the RF signal interference testing method and the corresponding effects have been described in detail in the above explanation of the operation auxiliary system, and will not be elaborated in detail below, but only appropriate explanations will be given.

[0087] Figure 7 A flow chart of a radio frequency signal interference test method provided in an embodiment of the present application; a control terminal applied to any radio frequency signal interference test system provided in the above embodiments, such as Figure 7 As shown, the method includes:

[0088] S701: The control terminal sends a control instruction to the radio frequency communication module, so that the radio frequency communication module performs a corresponding operation under the control instruction.

[0089] S702 , the control terminal obtains a machine code generated by the processor after converting the output signal of the circuit to be tested, and determines whether the circuit to be tested can tolerate interference from the radio frequency signal according to the machine code.

[0090] Optionally, the control instruction is: an open instruction, a close instruction, a frequency band adjustment instruction, a channel adjustment instruction or a power adjustment instruction; wherein the open instruction is used to control the RF communication module to perform an open operation, the close instruction is used to control the RF communication module to perform a close operation, the frequency band adjustment instruction is used to control the RF communication module to adjust the frequency band, the channel adjustment instruction is used to control the RF communication module to adjust the channel, and the power adjustment instruction is used to control the RF communication module to adjust the transmission power.

[0091] In summary, the present application provides a radio frequency signal interference test system and method, the system includes: a shielding box, a device to be tested arranged in the shielding box, and a control terminal arranged outside the shielding box; wherein the device to be tested includes: a radio frequency communication module, a processor and at least one circuit to be tested, and the processor is connected to each circuit to be tested; the radio frequency communication module is connected to the control terminal in communication to receive control instructions sent by the control terminal; the processor is also connected to the control terminal in communication so that the control terminal obtains the machine code generated by the processor after converting the output signal of the circuit to be tested, and determines whether the circuit to be tested is tolerant to the interference of the radio frequency signal according to the machine code. In this system, the machine code generated by the processor after converting the output signal of the circuit to be tested is obtained through the control terminal, and the machine code is used to determine whether the circuit to be tested is tolerant to the interference of the radio frequency signal, so that the radio frequency signal interference test system can be used to simply and quickly locate the circuit module with weak design in the circuit to be tested, and make targeted improvements, thereby improving the efficiency of radio frequency signal interference testing, and having the advantages of practicality and strong versatility.

[0092] Figure 8 A schematic diagram of the structure of a radio frequency signal interference testing device provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the device may include: a sending module 801 and a determining module 802.

[0093] The sending module 801 is used to control the terminal to send a control instruction to the radio frequency communication module, so that the radio frequency communication module performs a corresponding operation under the control instruction.

[0094] The determination module 802 is used to control the terminal to obtain the machine code generated by the processor after converting the output signal of the circuit to be tested, and determine whether the circuit to be tested can tolerate the interference of the radio frequency signal according to the machine code.

[0095] Optionally, the control instruction is: an open instruction, a close instruction, a frequency band adjustment instruction, a channel adjustment instruction or a power adjustment instruction; wherein the open instruction is used to control the RF communication module to perform an open operation, the close instruction is used to control the RF communication module to perform a close operation, the frequency band adjustment instruction is used to control the RF communication module to adjust the frequency band, the channel adjustment instruction is used to control the RF communication module to adjust the channel, and the power adjustment instruction is used to control the RF communication module to adjust the transmission power.

[0096] The above-mentioned device is used to execute the method provided by the aforementioned embodiment, and its implementation principle and technical effect are similar, which will not be repeated here.

[0097] The above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), or one or more digital singnal processors (DSP), or one or more field programmable gate arrays (FPGA). For another example, when a module is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0098] Fig. 9 A structural schematic diagram of a control terminal provided in an embodiment of the present application, which control terminal may be a control terminal in the above-mentioned radio frequency signal interference test system.

[0099] The control terminal may include: a processor 901 and a memory 902 .

[0100] The memory 902 is used to store programs, and the processor 901 calls the programs stored in the memory 902 to execute the above method embodiment. The specific implementation method and technical effect are similar and will not be repeated here.

[0101] Optionally, the present invention also provides a program product, such as a computer-readable storage medium, comprising a program, which is used to execute the above method embodiment when executed by a processor.

[0102] In the several embodiments provided by the present invention, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the system embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0103] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0104] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0105] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), disk or optical disk and other media that can store program codes.

[0106] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A radio frequency signal interference test system, characterized in that: The radio frequency signal interference test system comprises: a shielding box, a device to be tested arranged in the shielding box, and a control terminal arranged outside the shielding box; wherein the device to be tested comprises: a radio frequency communication module, a processor and at least one circuit to be tested, and the processor is connected to each circuit to be tested; The radio frequency communication module is connected to the control terminal for receiving control instructions sent by the control terminal; the processor is also connected to the control terminal for enabling the control terminal to obtain a machine code generated by the processor after converting the output signal of the circuit under test, and determine whether the circuit under test is tolerant to interference from the radio frequency signal according to the machine code; The at least one circuit under test includes: an analog input voltage circuit; wherein the radio frequency signal interference test system also includes a first power supply and a second power supply; the device under test also includes: a power supply circuit; The first power supply is electrically connected to the power supply circuit, and the power supply circuit is electrically connected to the power supply terminals of the radio frequency communication module, the processor and the at least one circuit to be tested, respectively, for supplying power to the radio frequency communication module, the processor and the at least one circuit to be tested; The second power supply is electrically connected to the input terminal of the analog input voltage circuit, and is used to provide an input voltage signal to the analog input voltage circuit; The control terminal is used to obtain the machine code generated by the processor after converting the output signal of the analog input voltage circuit, and determine whether the analog input voltage circuit can tolerate radio frequency signal interference.

2. The system according to claim 1, characterized in that The shielding box comprises: a shielding box body, a hinge door arranged above the shielding box body, and a through hole arranged on the side; wherein the shielding box body is used to place the device to be tested; The hinged door above the shielding box is used for taking and placing the device under test; the through hole is used to lead multiple leads in the device under test out of the shielding box through the through hole, and the gaps in the through hole after the leads are led out are shielded with shielding materials.

3. The system according to claim 2, characterized in that The position of each lead wire among the plurality of lead wires close to the through hole is wound with insulating material.

4. The system according to claim 1, characterized in that The radio frequency signal interference test system also includes: an oscilloscope; The output end of each circuit to be tested is also electrically connected to the oscilloscope so that the oscilloscope displays the waveform changes of the output signal of each circuit to be tested.

5. The system according to claim 1, characterized in that The at least one circuit to be tested further includes: an analog input current circuit; the second power supply is also electrically connected to an input end of the analog input current circuit via a preset resistor, so as to provide an input current signal to the analog input current circuit; The control terminal is further used to obtain the machine code generated by the processor after converting the output signal of the analog input current circuit, and determine whether the analog input current circuit can tolerate radio frequency signal interference.

6. The system according to claim 1, characterized in that The at least one circuit to be tested further comprises: a pulse width modulation PWM circuit; The preset solenoid valve is electrically connected to the output end of the PWM circuit to drive the preset solenoid valve; The control terminal is further used to obtain the machine code generated by the processor after converting the output signal of the PWM circuit, and determine whether the PWM circuit can tolerate radio frequency signal interference.

7. The system according to any one of claims 1 to 6, characterized in that: The radio frequency communication module is connected to the control terminal by serial communication; the processor is connected to the control terminal by a local area network controller CAN bus.

8. The system according to any one of claims 1 to 6, characterized in that: The radio frequency communication module is any one of the following communication modules: a mobile network communication module, a global positioning system GPS communication module, a wireless fidelity WiFi communication module, and a Bluetooth communication module.

9. A radio frequency signal interference testing method, characterized in that: The method is applied to a control terminal in a radio frequency signal interference test according to any one of claims 1 to 8, and the method comprises: The control terminal sends a control instruction to the radio frequency communication module, so that the radio frequency communication module performs a corresponding operation under the control instruction; The control terminal obtains a machine code generated by the processor after converting an output signal of the circuit under test, and determines whether the circuit under test can tolerate interference from a radio frequency signal according to the machine code.

10. The method according to claim 9, characterized in that The control instruction is: an open instruction, a close instruction, a frequency band adjustment instruction, a channel adjustment instruction or a power adjustment instruction; wherein the open instruction is used to control the radio frequency communication module to perform an open operation, the close instruction is used to control the radio frequency communication module to perform a close operation, the frequency band adjustment instruction is used to control the radio frequency communication module to adjust the frequency band, the channel adjustment instruction is used to control the radio frequency communication module to adjust the channel, and the power adjustment instruction is used to control the radio frequency communication module to adjust the transmission power.

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