CN114236291A - Electromagnetic interference detection device, detection method and computer readable storage medium - Google Patents
Electromagnetic interference detection device, detection method and computer readable storage medium Download PDFInfo
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- 238000001228 spectrum Methods 0.000 claims description 11
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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Abstract
The invention provides an electromagnetic interference detection device, an electromagnetic interference detection method and a computer readable storage medium. According to the invention, through the arrangement of the radiation detection module and the conduction detection module, when detection is required, only the equipment to be detected is required to be connected with the power socket of the equipment to be detected, and then corresponding detection operation is carried out through the module switching structure, the equipment to be detected is not required to be carried, and the equipment to be detected is not required to be frequently connected with different detection equipment, so that the detection time is saved, and the cost for providing a shielding chamber for a plurality of detection equipment is also saved.
Description
Technical Field
The present invention relates to the field of electromagnetic interference detection, and in particular, to an electromagnetic interference detection apparatus, an electromagnetic interference detection method, and a computer-readable storage medium.
Background
Electromagnetic Interference (EMI) is an important index affecting the performance and stability of electronic products, international and national standards both put forward strict requirements on Electromagnetic Compatibility (EMC) of electronic products, various electronic components, devices and the like in the same Electromagnetic environment should be able to work normally without mutual Interference, and the Electromagnetic Interference cannot cause damage to human bodies and the environment, and the Electromagnetic Interference can be divided into two categories of conductive Interference and radiation Interference according to the principle and the propagation mode of EMI.
Generally, newly developed electronic products need to be detected by a special electromagnetic interference tester and other devices, and when the electromagnetic interference is controlled within a range that enables the whole device to normally operate and meets the specified EMC standard, the electronic products can be produced and sold in a large scale aiming at Radio Frequency (RF) signals emitted by each electronic component and each connecting device.
In the existing electromagnetic interference detection process, different devices are required to be adopted to detect radiation interference and conducted interference respectively, often the same machine needs to be repeatedly switched to detect the devices to perform thorough verification, and the devices need to be continuously switched and electrified among different devices, so that the test period is long, the efficiency is low, and in addition, in order to avoid the interference in the test, a corresponding shielding room needs to be arranged for each device, and the site occupies a large area.
Disclosure of Invention
The invention solves the problems that in the prior art, different devices are required to be adopted to respectively detect radiation interference and conducted interference, and the different detection devices are required to be switched and electrified continuously, so that the test period is longer, the efficiency is lower, and in order to avoid the interference in the test, a corresponding shielding room is required to be arranged for each device, so that the occupied space is larger.
In order to solve the above problems, the present invention discloses an electromagnetic interference detection apparatus, which includes a housing, wherein a radiation detection module and a conduction detection module are arranged inside the housing, the radiation detection module is used for detecting radiation interference, the conduction detection module is used for detecting conduction interference, a power line channel is arranged on the radiation detection module, a power socket of a device to be detected is arranged on the housing, the power line channel penetrates through the radiation detection module, the power socket of the device to be detected is arranged between the radiation detection module and the conduction detection module, the housing is further provided with a module switching structure, and the module switching structure is used for switching the radiation detection module or the conduction detection module to enter a working state.
Through the arrangement, when the electromagnetic interference needs to be detected, the working state of the electromagnetic interference detection device is switched through the module switching structure, when the radiation detection module is switched to the conduction detection module to enter the working state, the radiation detection module is in the non-working state, when the device is switched to the radiation detection module to enter the working state, the conduction detection module is in the non-working state, the device comprises two modules of radiation interference detection and conduction interference detection, so that all electromagnetic interference detection of the device to be detected can be completed by only arranging a shielding chamber, and the plug to be detected only needs to be plugged once in the whole detection process, so that frequent switching and plugging among detection equipment are avoided, the problem that the equipment to be detected is frequently carried to a shielding chamber is also solved, the detection efficiency of electromagnetic interference of the equipment to be detected is greatly improved, and the space occupation of the detection equipment is reduced.
Furthermore, the radiation detection module comprises a power absorption clamp and a spectrum analyzer, the power absorption clamp is arranged around the power line channel, when the radiation detection module is in a working state, the power absorption clamp is closed and used for detecting radiation interference, and the spectrum analyzer is electrically connected with the power absorption clamp and used for measuring a radiation interference signal output by the power absorption clamp.
During testing, a power line to be tested is straightened, the power absorption clamp detects the position of the maximum current, the current change on the power line to be tested generates a changing magnetic field, the ferrite ring in the power absorption clamp absorbs the changing magnetic field, the changing magnetic field is converted into current and finally converted into voltage, the current and the voltage are presented on the spectrum analyzer in a power mode, and the spectrum analyzer is connected with a computer and presents the final detection result in software of the computer.
Further, the module switching structure comprises a first switch for controlling the closing or opening of the power absorbing pincers.
This setting can realize solitary conducted interference and detect, and in solitary conducted interference testing process, because the unable closure of ferrite ring to suppressed its filtering action, prevented its influence to conducted interference low-frequency channel, helped obtaining accurate conducted interference testing result.
Further, the conduction detection module comprises a linear impedance stabilization network and a radiation detection line connected in parallel with the linear impedance stabilization network, the linear impedance stabilization network and the radiation detection line are reversely connected in an on-off mode, namely when the linear impedance stabilization network is connected into the circuit, the radiation detection line is disconnected, and when the radiation detection line is connected, the linear impedance stabilization network is disconnected.
According to the radiation interference detection device, independent radiation interference detection can be achieved, and in the independent radiation interference detection process, due to the fact that the linear impedance stabilization network cannot be connected into the circuit, the influence of an internal filter structure on the radiation interference is restrained, and the accurate radiation interference detection result is obtained.
Further, a second switch is arranged on the shell and used for controlling the connection or disconnection of the linear impedance stabilizing network and synchronously controlling the connection or disconnection of the radiation detection circuit.
The second switch is used for the connection or disconnection operation of the linear impedance stabilizing network and the radiation detection circuit, so that the operation steps are simplified, and the detection process of the electrical measurement interference is simpler and more convenient.
Furthermore, the first switch and the second switch are controlled in a reverse correlation mode, when the first switch is pressed down, the second switch bounces, the power absorption clamp is disconnected, the radiation detection circuit is disconnected, and the linear impedance stabilization network is connected into the circuit; when the second switch is pressed, the first switch bounces, the power absorption clamp is closed, the linear impedance stabilization network is disconnected, and the radiation detection circuit is connected into the circuit; or when the first switch is pressed down, the second switch bounces, the power absorption clamp is closed, the radiation detection circuit is connected into the circuit, and the linear impedance stabilization network is disconnected; when the second switch is pressed, the first switch bounces, the power absorption clamp is disconnected, the linear impedance stabilization network is connected into the circuit, and the radiation detection circuit is disconnected.
The arrangement completely isolates the working states of the radiation detection module and the conduction detection module, so that the electric measuring interference device is not used for detecting conducted interference and radiation conduction at the same time, the mutual influence between the radiation detection module and the conduction detection module during working is avoided, the detection precision is ensured, when the power absorption clamp is closed and a radiation detection circuit is connected into a circuit, the power absorption clamp is used for detecting the radiation interference, at the moment, the linear impedance stabilization network is kept disconnected, the conduction detection module is in a non-working state, the influence of a filter structure in the linear impedance stabilization network on the radiation interference can be effectively avoided, and the detection precision of the radiation interference is ensured; when the linear impedance stabilization network is connected to the circuit, the linear impedance stabilization network is used for detecting conducted interference, at the moment, the power absorption clamp is kept disconnected, and the radiation detection circuit is disconnected, so that the radiation detection module is in a non-working state, the influence of the ferrite ring on a low frequency band of the conducted interference can be effectively avoided, and an accurate conducted interference detection result is obtained.
Further, the conduction detection module further comprises a measurement receiver, a radio frequency amplifier is arranged between the linear impedance stabilizing network and the measurement receiver, the radio frequency amplifier amplifies and outputs the power of the detected conduction interference signal, and the measurement receiver is used for measuring the received conduction interference signal.
During detection, the linear impedance stabilization network is connected into a circuit, conducted interference is attenuated to a proper voltage measurement range through an attenuation structure inside the linear impedance stabilization network, a certain specific frequency signal in the conducted interference signal is selected through the radio frequency amplifier, the interference signal is filtered and transmitted into the measurement receiver to be measured, the measurement receiver is connected with a computer, and a final detection result is displayed in software of the computer.
Further, the linear impedance stabilization network comprises a first inductor arranged on the live wire and a second inductor arranged on the zero wire, a first capacitor is arranged between the source end of the first inductor and the ground wire, a second capacitor is arranged between the source end of the second inductor and the ground wire, a third capacitor and a first resistor are arranged between the terminal of the first inductor and the ground wire in series, and a fourth capacitor and a second resistor are arranged between the terminal of the second inductor and the ground wire in series.
The first inductor, the second inductor, the first capacitor and the second capacitor form a low-pass filter and are used for attenuating interference signals from a mains power grid, the third capacitor and the fourth capacitor are coupling capacitors and are used for switching conducted interference signals generated by the linear impedance stabilizing network into the measuring receiver, the first resistor and the second resistor are used for providing input impedance and load impedance of the measuring receiver, in some embodiments, the resistance values of the first resistor and the second resistor are omega, and the first resistor and the second resistor are arranged in parallel so that the load impedance between the input impedance of the measuring receiver connected with the first resistor and the load impedance between a live wire zero line and a live wire zero line are standard impedances close to omega, and therefore the stable testing network is formed.
The invention also discloses an electromagnetic interference detection method, which comprises the following steps: electrifying the electromagnetic interference detection device, enabling a power line to be detected of equipment to be detected to penetrate through a power line channel and be connected with a power socket of the equipment to be detected, switching the conduction detection module into a working state through the module switching structure when the conduction interference needs to be detected, and disconnecting the radiation detection module; when the radiation interference needs to be detected, the radiation detection module is switched to be in a working state through the module switching structure, and the conduction detection module is disconnected.
Through the detection method, in the process of detecting the electromagnetic interference of the equipment to be detected, only the power line to be detected needs to be connected with the power socket of the equipment to be detected, then the module switching structure is used for controlling and detecting the radiation interference or the conducted interference, other operations are not needed, the equipment to be detected does not need to be carried in the whole process, and the equipment to be detected does not need to be frequently connected with different detection equipment, so that the detection operation is greatly simplified, the detection time is saved, the cost for equipping a plurality of detection equipment with shielding chambers is also saved, the detection cost is greatly reduced, and the detection efficiency is improved.
The invention also discloses a computer readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the electromagnetic interference detection device realizes the detection method.
Compared with the prior art, the electromagnetic interference detection device, the electromagnetic interference detection method and the computer-readable storage medium have the following advantages:
according to the invention, through the arrangement of the radiation detection module and the conduction detection module in the shell and the control of the working states of the radiation detection module and the conduction detection module through the module switching structure, when detection is required, only the power line to be detected of the equipment to be detected is required to be connected with the power socket of the equipment to be detected, and then corresponding detection operation is carried out through the module switching structure, other operations are not required, the equipment to be detected is not required to be carried in the whole process, and the equipment to be detected is not required to be frequently connected with different detection equipment, so that the detection operation is simplified, the detection time is saved, and the cost for providing a shielding chamber for a plurality of detection equipment is also saved. The invention has simple structure and simple operation, greatly reduces the detection cost and improves the detection efficiency.
Drawings
Fig. 1 is a schematic overall structure diagram of an electromagnetic interference detection apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an EMI detection apparatus including a radiation detection module and a conduction detection module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an equivalent structure of the electromagnetic interference detection apparatus according to the embodiment of the present invention when detecting conducted interference;
fig. 4 is a schematic diagram of an equivalent structure of the electromagnetic interference detection apparatus according to the embodiment of the present invention when detecting radiation interference.
Description of reference numerals:
1-a shell; 11-a first switch; 12-a second switch; 13-power socket of the equipment to be tested; 14-power line channel; 2-a radiation detection module; 21-power absorbing clamps; 211-ferrite ring; 212-ferrite filter; 22-a spectrum analyzer; 3-a conduction detection module; 31-a linear impedance stabilization network; 311-a first inductance; 312 — a second inductance; 313-a first capacitance; 314-a second capacitance; 315-third capacitance; 316-fourth capacitance; 317-a first resistance; 318-a second resistance; 32-a radiation detection circuit; 33-a measurement receiver; 4-equipment to be tested; 41-power line to be tested; 42-a plug to be tested; 5-a computer; 6-detecting the power supply connection part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
An electromagnetic interference detection apparatus, an electromagnetic interference detection method, an air conditioner, and a storage medium according to embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
This embodiment provides an electromagnetic interference detection device, as shown in fig. 1, including casing 1 is inside to be provided with radiation detection module 2 and conduction detection module 3, radiation detection module 2 is used for detecting radiation interference, conduction detection module 3 is used for detecting conduction interference radiation detection module 2 is last to be provided with power cord passageway 14 be provided with the equipment power socket 13 that awaits measuring on the casing 1, power cord passageway 14 runs through radiation detection module 2, equipment power socket 13 that awaits measuring sets up between radiation detection module 2 and the conduction detection module 3 still be provided with module switching structure on the casing 1, module switching structure is used for switching radiation detection module 2 or conduction detection module 3 get into operating condition. Through the above arrangement, when the electromagnetic interference needs to be detected, the power line 41 to be detected of the device 4 to be detected passes through the power line channel 14, the plug 42 to be detected on the power line 41 to be detected is inserted into the power socket 13 of the device to be detected, the detection power connection part 6 is connected with the commercial power, the working state of the electromagnetic interference detection device is switched through the module switching structure, when the electromagnetic interference detection device is switched to the conduction detection module 3 to enter the working state, the radiation detection module 2 is in the non-working state, so as to avoid forming interference on the conduction detection module 3 and ensure the detection accuracy, when the electromagnetic interference detection device is switched to the radiation detection module 2 to enter the working state, the conduction detection module 3 is in the non-working state, so as to avoid forming interference on the radiation detection module 2 and ensure the detection accuracy, and the arrangement comprises two modules of radiation interference detection and conduction interference detection, only need set up a shielding room and can accomplish the whole electromagnetic interference detection of equipment to be detected 4, and only need in whole testing process will plug 42 to be detected pegs graft once, has avoided frequent switching and grafting between the check out test set, has also overcome the problem of frequently carrying the shielding room with equipment to be detected 4, has improved 4 electromagnetic interference's of equipment to be detected detection efficiency greatly, has reduced check out test set's space and has taken up.
As an example, as shown in fig. 4, the radiation detection module 2 includes a power absorption clamp 21 and a spectrum analyzer 22, the power absorption clamp 21 is disposed around the power line channel 14, when the radiation detection module 2 is in an operating state, the power absorption clamp 21 is closed for detecting radiation interference, and the spectrum analyzer 22 is electrically connected to the power absorption clamp 21 for measuring a radiation interference signal output by the power absorption clamp 21. During testing, the power line 41 to be tested is straightened, the power absorption clamp 21 detects the maximum current, the current change on the power line 41 to be tested generates a changing magnetic field, the ferrite ring 211 inside the power absorption clamp 21 absorbs the changing magnetic field, the changing magnetic field is converted into current and finally converted into voltage, the current and the voltage are presented on the spectrum analyzer 22 in the form of power, the spectrum analyzer 22 is connected with the computer 5, the final detection result is presented in software of the computer 5, and the radiation detection module 2 can detect radiation interference in the radiation range of 30MHz-300 MHz.
Specifically, power absorption pincers 21 includes lower pincers shell and last pincers shell, form the pincers shell when going up pincers shell and lower pincers shell closure be provided with ferrite ring 211 and ferrite filter 212 in the pincers shell, ferrite ring 211 is used for the absorbed power, ferrite filter 212 is used for filtering, in order to ensure radiated interference's detection precision still be provided with the through-hole on the pincers shell, work as when going up pincers shell, lower pincers shell closure, the through-hole runs through the pincers shell, the through-hole is used for holding power cord 41 that awaits measuring to accomplish radiated interference's detection.
As an embodiment of the present invention, as shown in fig. 1 and fig. 2, the module switching structure includes a first switch 11, and the first switch 11 is used for controlling the power absorption clamp 21 to be closed or opened. When the power absorption clamp 21 is disconnected, the radiation detection module 2 is in a non-operating state, at the moment, the electromagnetic interference detection device cannot be used for detecting the radiation interference, when the power absorption clamp 21 is closed, the electromagnetic interference detection device can be used for detecting the radiation interference, the independent conduction interference detection can be realized through the arrangement, and in the independent conduction interference detection process, because the ferrite ring 211 cannot be closed, the filtering effect is inhibited, the influence of the ferrite ring on the low frequency band of the conduction interference is prevented, and the accurate conduction interference detection result is obtained.
In some embodiments, as shown in fig. 2, the conduction detection module 3 includes a linear impedance stabilization network 31 and a radiation detection line 32 connected in parallel with the linear impedance stabilization network 31, where the linear impedance stabilization network 31 and the radiation detection line 32 are connected in an opposite on-off manner, that is, when the linear impedance stabilization network 31 is connected to a circuit, the radiation detection line 32 is disconnected, and when the radiation detection line 32 is connected, the linear impedance stabilization network 31 is disconnected. This arrangement can realize that the linear impedance stabilization network 31 is connected or disconnected, when it is connected to the circuit, the electromagnetic interference detection device can be used for detecting conducted interference, and when it is disconnected, the electromagnetic interference detection device cannot detect conducted interference. The device can realize independent radiation interference detection, in the independent radiation interference detection process, because the linear impedance stabilizing network 31 cannot be connected into a circuit, the influence of an internal filter structure on the radiation interference is inhibited, the accurate radiation interference detection result is favorably obtained, and the conduction detection module 3 can detect the conduction interference in the conduction range of 150kHz-30 MHz.
Specifically, a second switch 12 is disposed on the housing 1, and the second switch 12 is used for controlling the connection or disconnection of the linear impedance stabilizing network 31 and synchronously controlling the connection or disconnection of the radiation detection line 32. The second switch 12 is used for the connection or disconnection operation of the linear impedance stabilizing network 31 and the radiation detection line 32, so that the operation steps are simplified, and the detection process of electrical interference is simpler and more convenient.
As an alternative embodiment, the first switch 11 and the second switch 12 are controlled in a reverse correlation manner, when the first switch 11 is pressed, the second switch 12 bounces, the power absorption clamp 21 is disconnected, the radiation detection line 32 is disconnected, and the linear impedance stabilizing network 31 is connected into the circuit; when the second switch 12 is pressed, the first switch 11 bounces, the power absorption clamp 21 is closed, the linear impedance stabilizing network 31 is disconnected, and the radiation detection circuit 32 is connected into the circuit; or, when the first switch 11 is pressed, the second switch 12 bounces, the power absorption clamp 21 is closed, the radiation detection circuit 32 is connected into the circuit, and the linear impedance stabilizing network 31 is opened; when the second switch 12 is pressed, the first switch 11 is bounced, the power absorption clamp 21 is disconnected, the linear impedance stabilization network 31 is connected into the circuit, and the radiation detection circuit 32 is disconnected. The arrangement completely isolates the working states of the radiation detection module 2 and the conduction detection module 3, so that the electric measuring interference device is not used for detecting conducted interference and radiation conduction at the same time, the mutual influence between the radiation detection module 2 and the conduction detection module 3 during working is avoided, the detection precision is ensured, when the power absorption clamp 21 is closed and the radiation detection circuit 32 is connected into a circuit, the linear impedance stabilizing network 31 is kept disconnected, the conduction detection module 3 is in a non-working state, the influence of a filter structure in the linear impedance stabilizing network 31 on the radiation interference can be effectively avoided, and the detection precision of the radiation interference is ensured; when the linear impedance stabilizing network 31 is connected to a circuit, the linear impedance stabilizing network is used for detecting conducted interference, at this time, the power absorption clamp 21 is kept disconnected, and the radiation detection circuit 32 is disconnected, so that the radiation detection module 2 is in a non-operating state, the influence of the ferrite ring 211 on a low frequency band of the conducted interference can be effectively avoided, and an accurate conducted interference detection result can be obtained.
As an embodiment of the present invention, as shown in fig. 3, the conducted interference detection module 3 further includes a measurement receiver 33, a radio frequency amplifier (not shown in the figure) is disposed between the linear impedance stabilization network 31 and the measurement receiver 33, the radio frequency amplifier amplifies and outputs the power of the detected conducted interference signal, and the measurement receiver 33 is configured to measure the received conducted interference signal. During detection, the linear impedance stabilizing network 31 is connected into a circuit, conducted interference is attenuated to a proper voltage measurement range through an attenuation structure inside the linear impedance stabilizing network 31, a certain specific frequency signal in the conducted interference signal is selected through the radio frequency amplifier, the interference signal is filtered and transmitted into the measurement receiver 33 to be measured, the measurement receiver 33 is connected with the computer 5, and a final detection result is displayed in software of the computer 5.
Specifically, in this embodiment, as shown in fig. 2, the linear impedance stabilizing network 31 includes a first inductor 311 disposed on the live line and a second inductor 312 disposed on the neutral line, a first capacitor 313 is disposed between a source end of the first inductor 311 and the ground line, a second capacitor 314 is disposed between a source end of the second inductor 312 and the ground line, a third capacitor 315 and a first resistor 317 are disposed in series between a terminal of the first inductor 311 and the ground line, and a fourth capacitor 316 and a second resistor 318 are disposed in series between a terminal of the second inductor 312 and the ground line. It should be noted that the source end is an end close to the input end of the commercial power supply, the terminal end is an end far from the input end of the commercial power supply, in this embodiment, the first inductor 311, the second inductor 312, the first capacitor 313 and the second capacitor 314 form a low-pass filter for attenuating an interference signal from the commercial power grid, the third capacitor 315 and the fourth capacitor 316 are coupling capacitors, the coupling capacitors are used for transferring a conducted interference signal generated by the linear impedance stabilizing network 31 to the measurement receiver 33, the first resistor 317 and the second resistor 318 are used for providing an input impedance and a load impedance of the measurement receiver 33, in some embodiments, the resistances of the first resistor 317 and the second resistor 318 are 50 Ω, and the first resistor 317 and the second resistor 318 are arranged in parallel, so that the input impedance of the measurement receiver 33 connected thereto and the load impedance between the live line and the neutral line are both standard impedances close to 50 Ω, thereby forming a stable test network.
It should be noted that the conduction detection module 3 is provided with a detection power supply connection portion 6, and the detection power supply connection portion 6 is a plug or a socket, and is used for being connected with a mains supply and providing a power supply for the electromagnetic interference detection device.
It should be understood that for easy operation of connecting the power line 41 to be tested with the power socket 13 of the device to be tested, a corresponding opening is provided on the housing 1 for manual operation.
Similarly, in order to ensure the detection accuracy of the radiation interference, the radiation detection module 2 further includes a slideway, the power absorption clamp 21 is disposed on the slideway, and the power absorption clamp 21 slides along the extending direction of the power line 41 to be detected in the closed state, so as to find the maximum current, and obtain a more accurate detection result.
Example 2
The embodiment discloses an electromagnetic interference detection method, which is used for the electromagnetic interference detection device in the embodiment 1.
The electromagnetic interference detection method comprises the following steps: electrifying the electromagnetic interference detection device, enabling a power line 41 to be detected of the equipment to be detected 4 to pass through the power line channel 14 and be connected with a power socket 13 of the equipment to be detected, switching the conduction detection module 3 into a working state through a module switching structure when the conduction interference needs to be detected, and disconnecting the radiation detection module 2; when the radiation interference needs to be detected, the radiation detection module 2 is switched to a working state through the module switching structure, and the conduction detection module 3 is disconnected.
Through the detection method, in the process of detecting the electromagnetic interference of the equipment to be detected 4, only the power line to be detected 41 is required to be connected with the power socket 13 of the equipment to be detected, then the module switching structure is used for controlling and detecting the radiation interference or the conduction interference, other operations are not required, the equipment to be detected 4 is not required to be carried in the whole process, the equipment to be detected is not required to be frequently connected with different detection equipment, the detection operation is greatly simplified, the detection time is saved, the cost for equipping a plurality of detection equipment with shielding chambers is also saved, the detection cost is greatly reduced, and the detection efficiency is improved.
Specifically, the electromagnetic interference detection method includes: electrifying the electromagnetic interference detection device, enabling a power line 41 to be detected of the equipment to be detected 4 to pass through the power line channel 14 and be connected with a power socket 13 of the equipment to be detected, pressing down the first switch 11 when the conducted interference needs to be detected, disconnecting the power absorption clamp 21, disconnecting the radiation detection circuit 32, and connecting the linear impedance stabilization network 31 into a circuit to detect the conducted interference; when the radiation interference needs to be detected, the second switch 12 is pressed, the first switch 11 bounces, the linear impedance stabilizing network 31 is disconnected, the power absorption clamp 21 is closed, the power line 41 to be detected is merged in the through hole, the radiation detection circuit 32 is disconnected, and the radiation interference detection is carried out; when multiple detections are required, the first switch 11 or the second switch 12 may be pressed as required.
In the whole detection process, the power line 41 to be detected is only required to be connected with the power socket 13 of the equipment to be detected, and then the first switch 11 or the second switch 12 is pressed according to the detection requirement, so that the operation flow is greatly reduced, the detection time is saved, and the detection efficiency is improved.
Example 3
The present embodiment discloses a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the detection method according to embodiment 2 is implemented by using an electromagnetic interference detection apparatus according to embodiment 1.
Although the present invention is disclosed above, the present invention is not limited thereto. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An electromagnetic interference detection device is characterized by comprising a shell (1), wherein a radiation detection module (2) and a conduction detection module (3) are arranged in the shell (1), the radiation detection module (2) is used for detecting radiation interference, the conduction detection module (3) is used for detecting conduction interference, a power line channel (14) is arranged on the radiation detection module (2), a power socket (13) of the equipment to be tested is arranged on the shell (1), the power line channel (14) penetrates through the radiation detection module (2), the power socket (13) of the equipment to be tested is arranged between the radiation detection module (2) and the conduction detection module (3), the shell (1) is further provided with a module switching structure, and the module switching structure is used for switching the radiation detection module (2) or the conduction detection module (3) to enter a working state.
2. The electromagnetic interference detection apparatus according to claim 1, wherein the radiation detection module (2) comprises a power absorption clamp (21) and a spectrum analyzer (22), the power absorption clamp (21) being disposed around the power line channel (14), the power absorption clamp (21) being closed for detecting the radiation interference when the radiation detection module (2) is in an operating state, the spectrum analyzer (22) being electrically connected to the power absorption clamp (21) for measuring a radiation interference signal output by the power absorption clamp (21).
3. The electromagnetic interference detection device according to claim 2, characterized in that the module switching arrangement comprises a first switch (11), the first switch (11) being adapted to control the closing or opening of the power absorbing pincers (21).
4. The EMI detection apparatus as claimed in claim 3, wherein said conduction detection module (3) includes a linear impedance stabilization network (31) and a radiation detection line (32) connected in parallel therewith, said linear impedance stabilization network (31) being connected in reverse with said radiation detection line (32), i.e. when the linear impedance stabilization network (31) is connected to the circuit, said radiation detection line (32) is disconnected, and when the radiation detection line (32) is connected, said linear impedance stabilization network (31) is disconnected.
5. The electromagnetic interference detection device according to claim 4, characterized in that a second switch (12) is arranged on the housing (1), the second switch (12) being adapted to control the connection or disconnection of the linear impedance stabilization network (31) and to synchronously control the connection or disconnection of the radiation detection line (32).
6. The EMI detection apparatus as claimed in claim 5, wherein said first switch (11) and said second switch (12) are controlled in reverse relation, and when the first switch (11) is pressed, the second switch (12) pops up, said power absorption clamp (21) is opened, the radiation detection circuit (32) is opened, and the linear impedance stabilization network (31) is connected to the circuit; when the second switch (12) is pressed down, the first switch (11) bounces, the power absorption clamp (21) is closed, the linear impedance stabilizing network (31) is disconnected, and the radiation detection circuit (32) is connected into a circuit; or when the first switch (11) is pressed, the second switch (12) bounces, the power absorption clamp (21) is closed, the radiation detection circuit (32) is connected into the circuit, and the linear impedance stabilizing network (31) is opened; when the second switch (12) is pressed, the first switch (11) bounces, the power absorption clamp (21) is disconnected, the linear impedance stabilizing network (31) is connected into a circuit, and the radiation detection circuit (32) is disconnected.
7. An emi detection device as claimed in claim 6, characterized in that the conducted interference detection module (3) further comprises a measurement receiver (33), a radio frequency amplifier is arranged between the linear impedance stabilizing network (31) and the measurement receiver (33), the radio frequency amplifier amplifies and outputs the power of the detected conducted interference signal, and the measurement receiver (33) is used for measuring the received conducted interference signal.
8. An electromagnetic interference detecting device according to any of claims 4-7, characterized in that the linear impedance stabilizing network (31) comprises a first inductance (311) arranged in the live line and a second inductance (312) arranged in the neutral line, a first capacitance (313) being arranged between the source terminal of the first inductance (311) and the ground line, a second capacitance (314) being arranged between the source terminal of the second inductance (312) and the ground line, a third capacitance (315) and a first resistance (317) being arranged in series between the terminal of the first inductance (311) and the ground line, and a fourth capacitance (316) and a second resistance (318) being arranged in series between the terminal of the second inductance (312) and the ground line.
9. An electromagnetic interference detection method, characterized in that the electromagnetic interference detection method comprises:
electrifying the electromagnetic interference detection device, enabling a power line (41) to be detected of the equipment to be detected (4) to penetrate through the power line channel (14) and be connected with a power socket (13) of the equipment to be detected, switching the conduction detection module (3) into a working state through the module switching structure when the conduction interference needs to be detected, and disconnecting the radiation detection module (2); when the radiation interference needs to be detected, the radiation detection module (2) is switched to a working state through the module switching structure, and the conduction detection module (3) is disconnected.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the detection method of claim 9 using the electromagnetic interference detection apparatus of any one of claims 1-8.
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