CN105785165A - Portable electromagnetic compatibility detection device and detection method - Google Patents
Portable electromagnetic compatibility detection device and detection method Download PDFInfo
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- CN105785165A CN105785165A CN201610118568.2A CN201610118568A CN105785165A CN 105785165 A CN105785165 A CN 105785165A CN 201610118568 A CN201610118568 A CN 201610118568A CN 105785165 A CN105785165 A CN 105785165A
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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
Abstract
The invention discloses a portable electromagnetic compatibility detection device and a detection method. The portable electromagnetic compatibility detection device comprises a host used for measuring electromagnetic signals, comparing electromagnetic emission signals of a device to be detected under a fault state with electromagnetic emission signals under a normal state, and generating a detection report; a storage module used for storing data required in the detection process; and a receiving unit used for receiving the electromagnetic signals emitted by the device to be detected, wherein the receiving unit further comprises one or more testing antennas used for receiving radiation signals emitted by the device to be detected at a certain distance and sending the received signals to the host, one or more current probes used for receiving conduction signals emitted by the device at fixed positions of cables connected with the device to be detected and sending the received signals to the host, and one or more near field probes used for receiving leaked electromagnetic signals on an internal board card of the device to be detected and sending the collected signals to the host.
Description
Technical field
The invention belongs to electromagnetic compatibility detection technical field, be specifically related to a kind of Portable electromagnetic compatibility detection equipment and detection method.
Background technology
Portable quickly detects equipment and is mainly used in logical finger equipment Electro Magnetic Compatibility on-the-spot test, diagnosis and information inquiry.Tested equipment can be carried out electromagnetic interference (EMI) test by equipment at the scene, judges that according to test data whether the Electromagnetic Launching characteristic of equipment is normal, and is analyzed judging to the Electro Magnetic Compatibility situation of change of equipment.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of Portable electromagnetic compatibility detection equipment and detection method.
A kind of Portable electromagnetic compatibility detection equipment, including:
Main frame, is used for measuring electromagnetic signal, and is compared with the Electromagnetic Launching signal under normal condition by the Electromagnetic Launching signal under Devices to test malfunction, generate examining report；
Memory module, for storing the data needing to use in detection process；
Power supply, for powering for detection equipment；
Man-machine interface, is used for realizing man machine interface information mutual；Described man-machine interface includes display, is used for showing test data and keyboard, is used for inputting data or instruction；
Receive unit, for receiving the electromagnetic signal that Devices to test is launched；Described reception unit comprises further:
One or more test antennas, for receiving the radiation signal that Devices to test is launched on certain distance, and are sent to main frame by received signal；
One or more current probes, for receiving the conducted signal that equipment is launched in the fixed position of Devices to test interconnecting cable, and are sent to main frame by received signal；
One or more near field probes, for receiving the electromagnetic signal of leakage on the internal board of Devices to test, and are sent to main frame by the signal gathered；
Radio frequency connector, is used for connecting radio-frequency cable and receiving unit；
Radio-frequency cable, for being connected reception unit with main frame by radio frequency connector；
Antenna spider, for being fixed installation by antenna；
Equipment containing box, is used for receiving described main frame, memory module, power supply, radio frequency connector, radio-frequency cable and antenna spider.
Preferably, described near field probes has fixing device, for described near field probes being fixed and the internal board of Devices to test being measured；Thus can by tested equipment electromagnetic compatibility mal function point location to board level.
Preferably, described main frame farther includes:
Interference noise background cancellation module, for eliminating the background noise of test site；
Detection signal extraction module, for extracting detection signal from ambient level；
Measurement module, is used for measuring electromagnetic signal；
Electromagnetic compatibility diagnostic analysis module；For being compared with the Electromagnetic Launching signal under normal condition by the Electromagnetic Launching signal under Devices to test malfunction, generate examining report.
The detection method of a kind of foregoing Portable electromagnetic compatibility detection equipment, comprises the steps of
Step S0: start powers on；
Step S1: login username and password；
Step S2: selecting action type, described action type includes but not limited to: SIM system information management type, data management type；Electromagnetic compatibility detection type；
Step S3: when the action type selected is SIM system information management type, enter step S100；When the action type selected is data management type, enter step S200；When the action type selected is electromagnetic compatibility detection type, enter step S300；
Step S100: judge whether active user has SIM system information management authority；Without authority, then enter step S101；If had permission, then enter step S102；
Step S101: user is without current operation authority in prompting, and current operation is exited in prompting user's selection or action type is revised in return；If user selects to exit, then enter step S400；If user selects to return amendment action type, then return step S2；
Step S102: select system management messages action type；Described system management messages action type includes but not limited to: user manages action type；Test device management operations type；Equipment under test management action type；Ultimate value curve management action type；
Step S103: when the system management messages action type selected manages action type for user, enter step S1001；When the system management messages action type selected is for test device management operations type, enter step S1002；When the system management messages action type selected is equipment under test management action type, enter step S1003；Step S1004 is entered when the system management messages action type selected is ultimate value curve management action type；
Step S1001: user profile is managed, includes but not limited to: adds, revises or delete user；Step S1005 is entered after having operated；
Step S1002: test equipment is managed, includes but not limited to: add, edit, delete information and the parameter of test equipment；Step S1005 is entered after having operated；
Step S1003: tested equipment is managed, includes but not limited to: add, edit, delete tested equipment；Step S1005 is entered after having operated；
Step S1004: ultimate value curve is managed, includes but not limited to: add, edit, delete testing standard ultimate value curve；Step S1005 is entered after having operated；
Step S1005: judge whether to exit current operation, if yes then enter step S400；If it is not, then return step S2；
Step S200: judge whether active user has data administration authority；Without authority, then enter step S101；If had permission, then enter step S202；
Step S202: carry out testing the search of data according to tester, testDate, tested equipment, test checking and deleting of data；
Step S203: judge whether to exit current operation, if yes then enter step S400；If it is not, then return step S2；
Step S300: judge whether active user has electromagnetic compatibility detection authority；Without authority, then enter step S301；If had permission, then enter step S302；
Step S301: user is without current operation authority in prompting, and current operation is exited in prompting user's selection or action type is revised in return；If user selects to exit, then enter step S400；If user selects to return amendment action type, then return step S2；
Step S302: Detection task is set；
Step S303: obtain the background electromagnetic signal under equipment under test off-mode；
Step S304: obtain the electromagnetic signal under equipment under test open state；
Step S305: eliminate ambient interferences；
Step S306: extract detection signal；
Step S307: the electromagnetic signal test curve of equipment under test and testing standard ultimate value curve are compared, generates test report.
Step S400: terminate.
Preferably, step S1: login username and password, particularly as follows:
If user name or code error, point out and re-enter, if it is still incorrect to re-enter number of times arrival pre-determined number, then described detection equipment is locked the scheduled time, forbid register.
Preferably, described step S303 is being performed: obtain the background electromagnetic signal under equipment under test off-mode；And step S304: when obtaining the electromagnetic signal under equipment under test open state, it is necessary to keep twice test parameter to arrange completely the same, make data have comparability；Described test parameter equipment includes but not limited to: resolve bandwidth RBW, decay, frequency step.
Preferably, described step S305: eliminate ambient interferences；It is specially；
It is whether the Electromagnetic Launching of equipment itself by a certain frequency of background signal identification decision, if it is not, then carry out Processing for removing；
Described background signal identification is particularly as follows: contrast the electromagnetic signal test curve under equipment under test open state with the background electromagnetic signal testing curve under equipment under test off-mode；Determine that the crest signal that in the electromagnetic signal under equipment under test open state, which frequency is corresponding is caused by background electromagnetic signal；Choose this frequency to the left side trough of induction signal and right side trough；Left side trough is chosen for left side end points；Right side trough is chosen for right side end points；The data of the data linear interpolation between left side end points and right side end points are replaced.
Preferably, described step S306: extract detection signal and farther include:
Step S3060: judge that whether current frequency is last frequency；If it is not, then go to step S3051, if it is, go to step S3060；
Step S3061: judge whether the signal that this frequency is corresponding is crest signal, namely more than the level magnitude of left and right frequency；If it is, enter step S3052, if it is not, then enter step S3055；
Step S3062: judge the valley value relative to left and right, whether the amplitude at this frequency place all at least exceeds amplitude P (namely meeting the requirement of certain signal to noise ratio) than two, left and right trough simultaneously；If it is, go to step S3066；If it is not, then go to step S3053；
S3063: judge whether crest at least exceeds amplitude P than one of them valley value in the trough of two, left and right；If it is, go to step S3054；If it is not, then go to S3055；
Step S3064: judge, in the trough side being unsatisfactory at least exceeding amplitude P, whether neighbouring exist the trough satisfied condition less than frequency FM place；If it has, then go to step S3056；If it is not, go to step S3055；Described frequency FM can be configured as required；
Step S3065: abandon this frequency；Go to step S3059；
Step S3066: record this frequency；Judge whether this frequency place occurs RBW to change, if it is, go to step S3057；If it is not, then go to step S3058；
Go to step S3067, abandon this frequency；Go to step S3059；
Step S3068: record this frequency；Go to step S3059；
Step S3069: go to next frequency, and be back to step S3050；
Step S3070: extract all frequencies of current record, the frequency of current all records is chosen for signal frequency point；
Go to step S307.
Preferably, when the electromagnetic signal test curve under equipment under test open state being contrasted with the background electromagnetic signal testing curve under equipment under test off-mode；Select a certain frequency FS in the electromagnetic signal test curve under equipment under test open state, background electromagnetic signal testing curve under equipment under test off-mode searches maximum in a certain seeking scope near corresponding frequency, this maximum is compared as with the value corresponding for frequency FS in the electromagnetic signal test curve under equipment under test open state.
Preferably, when signal generation aliasing, it is necessary to two ripple each frequencies peak-to-peak will compare as signal frequency point, when signal is be more than or equal to default snr threshold, corresponding frequency is retained, and when signal is less than default snr threshold, corresponding frequency carries out the peak process that disappears；The described peak that disappears processes to be specially chooses this frequency to the left side trough of induction signal and right side trough；Left side trough is chosen for left side end points；Right side trough is chosen for right side end points；The data of the data linear interpolation between left side end points and right side end points are replaced.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, and can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Accompanying drawing explanation
Fig. 1 illustrates the composition frame chart of Portable electromagnetic compatibility according to an embodiment of the invention detection equipment；
Fig. 2 illustrates the detection method flow chart of Portable electromagnetic compatibility according to an embodiment of the invention detection equipment.
Detailed description of the invention
For further setting forth that the present invention reaches technological means and effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to the Portable electromagnetic compatibility detection equipment and its detailed description of the invention of detection method, feature and effect thereof proposed according to the present invention, describe in detail as after.In the following description, what different " embodiments " or " embodiment " referred to is not necessarily same embodiment.Additionally, special characteristic in one or more embodiment, structure or feature can be combined by any suitable form.
As it is shown in figure 1, Portable electromagnetic compatibility detection equipment includes:
Main frame, is used for measuring electromagnetic signal, and is compared with the Electromagnetic Launching signal under normal condition by the Electromagnetic Launching signal under Devices to test malfunction, generate examining report；
Memory module, for storing the data needing to use in detection process；
Power supply, for powering for detection equipment；
Man-machine interface, is used for realizing man machine interface information mutual；Described man-machine interface includes display, is used for showing test data and keyboard, is used for inputting data or instruction；
Receive unit, for receiving the electromagnetic signal that Devices to test is launched；Described reception unit comprises further:
One or more test antennas, for receiving the radiation signal that Devices to test is launched on certain distance, and are sent to main frame by received signal；
One or more current probes, for receiving the conducted signal that equipment is launched in the fixed position of Devices to test interconnecting cable, and are sent to main frame by received signal；
One or more near field probes, for receiving the electromagnetic signal of leakage on the internal board of Devices to test, and are sent to main frame by the signal gathered；
Radio frequency connector, is used for connecting radio-frequency cable and receiving unit；
Radio-frequency cable, for being connected reception unit with main frame by radio frequency connector；
Antenna spider, for being fixed installation by antenna；
Equipment containing box, is used for receiving described main frame, memory module, power supply, radio frequency connector, radio-frequency cable and antenna spider.
According to a specific embodiment of the present invention, described near field probes has fixing device, for described near field probes being fixed and the internal board of Devices to test being measured；Thus can by tested equipment electromagnetic compatibility mal function point location to board level.
According to a specific embodiment of the present invention, described main frame farther includes:
Interference noise background cancellation module, for eliminating the background noise of test site；
Detection signal extraction module, for extracting detection signal from ambient level；
Measurement module, is used for measuring electromagnetic signal；
Electromagnetic compatibility diagnostic analysis module；For being compared with the Electromagnetic Launching signal under normal condition by the Electromagnetic Launching signal under Devices to test malfunction, generate examining report.
Fig. 2 illustrates the electromagnetic compatibility detection method according to one detailed description of the invention of the present invention, comprises the steps of
Step S0: start powers on；
Step S1: login username and password；According to a specific embodiment of the present invention, if user name or code error, point out and re-enter, if it is still incorrect to re-enter number of times arrival pre-determined number, then described detection equipment is locked the scheduled time, forbid register；
Step S2: selecting action type, described action type includes but not limited to: SIM system information management type, data management type；Electromagnetic compatibility detection type；
Step S3: when the action type selected is SIM system information management type, enter step S100；When the action type selected is data management type, enter step S200；When the action type selected is electromagnetic compatibility detection type, enter step S300；
Step S100: judge whether active user has SIM system information management authority；Without authority, then enter step S101；If had permission, then enter step S102；
Step S101: user is without current operation authority in prompting, and current operation is exited in prompting user's selection or action type is revised in return；If user selects to exit, then enter step S400；If user selects to return amendment action type, then return step S2；
Step S102: select system management messages action type；Described system management messages action type includes but not limited to: user manages action type；Test device management operations type；Equipment under test management action type；Ultimate value curve management action type；
Step S103: when the system management messages action type selected manages action type for user, enter step S1001；When the system management messages action type selected is for test device management operations type, enter step S1002；When the system management messages action type selected is equipment under test management action type, enter step S1003；Step S1004 is entered when the system management messages action type selected is ultimate value curve management action type；
Step S1001: user profile is managed, includes but not limited to: adds, revises or delete user；Step S1005 is entered after having operated；
Step S1002: test equipment is managed, includes but not limited to: add, edit, delete information and the parameter of test equipment；Step S1005 is entered after having operated；
Step S1003: tested equipment is managed, includes but not limited to: add, edit, delete tested equipment；Step S1005 is entered after having operated；
Step S1004: ultimate value curve is managed, includes but not limited to: add, edit, delete testing standard ultimate value curve；Step S1005 is entered after having operated；
Step S1005: judge whether to exit current operation, if yes then enter step S400；If it is not, then return step S2；
Step S200: judge whether active user has data administration authority；Without authority, then enter step S101；If had permission, then enter step S202；
Step S202: carry out testing the search of data according to tester, testDate, tested equipment, test checking and deleting of data；
Step S203: judge whether to exit current operation, if yes then enter step S400；If it is not, then return step S2；
Step S300: judge whether active user has electromagnetic compatibility detection authority；Without authority, then enter step S301；If had permission, then enter step S302；
Step S301: user is without current operation authority in prompting, and current operation is exited in prompting user's selection or action type is revised in return；If user selects to exit, then enter step S400；If user selects to return amendment action type, then return step S2；
Step S302: Detection task is set；
According to a specific embodiment of the present invention, the described Detection task that arranges farther includes: arranges detection parameter, and obtains testing standard ultimate value curve according to set testing staff；Described testing standard ultimate value curve refers to, Devices to test electromagnetic interference curve ultimate value under glitch-free environment, during normal operation；Wherein the transverse axis of testing standard ultimate value curve is frequency, and the longitudinal axis is level value；When under a certain frequency, level value then represents equipment under test working state abnormal beyond corresponding testing standard ultimate value curve；
Step S303: obtain the background electromagnetic signal under equipment under test off-mode；
Need to carry out at the scene Electromagnetic Launching test owing to Portable electromagnetic compatibility detects equipment, and the electromagnetic environment at scene itself has contained the electromagnetic signal in the Electromagnetic Launching of much equipment and space, their existence can disturb user's judgement to tested equipment Electromagnetic Launching, therefore, Electromagnetic Launching signal for non-tested equipment, it is necessary to eliminate.For this, the method of measurement of comparison under on off state can be taked: when namely equipment under test does not work, record the frequency spectrum data F1 of background environment, then equipment under test is opened, measure equipment under test frequency spectrum data F2, by the relative analysis of F1 and F2, eliminate the interference that background causes, obtain the radiation-emitting data of equipment under test.
Step S304: obtain the electromagnetic signal under equipment under test open state；
Test under off-mode and under open state, test must keep twice test parameter to arrange completely the same, make data have comparability；According to a specific embodiment of the present invention, described test parameter equipment includes but not limited to: resolve bandwidth RBW, decay, frequency step.Described RBW (ResolutionBandwidth) represents the minimum frequency range difference that the signal of two different frequencies can clearly be distinguished, and the signal frequency range of two different frequencies is as lower than the RBW arranged, now this two signal is by overlap, it is difficult to differentiate.Relatively low RBW contributes to resolution and the measurement of different frequency signals, but low RBW will filter the signal composition of upper frequency, causes generation distortion when signal shows；Higher RBW contributes to the detecting of broadband signal, but increase is made an uproar at the end (NoiseFloor) by this, reduces and measures sensitivity, is easily generated obstruction for detecting low intensive signal.
Step S305: eliminate ambient interferences；
According to a specific embodiment of the present invention, the Electromagnetic Launching whether a certain frequency of background signal identification decision is equipment itself can be passed through, if it is not, then carry out Processing for removing.
Described background signal identification is particularly as follows: contrast the electromagnetic signal test curve under equipment under test open state with the background electromagnetic signal testing curve under equipment under test off-mode；Determine that the crest signal that in the electromagnetic signal under equipment under test open state, which frequency is corresponding is caused by background electromagnetic signal；Choose this frequency to the left side trough of induction signal and right side trough；Left side trough is chosen for left side end points；Right side trough is chosen for right side end points；The data of the data linear interpolation between left side end points and right side end points are replaced.
According to a specific embodiment of the present invention, it is also possible to the noise that superposition is certain when interpolation.
If the frequency values of the signal that twice test records near a certain frequency is inconsistent, namely frequency offsets, this situation is likely due to the instability of signal itself, or what frequency error when measuring caused, now should using the two signal as same signal processing.
According to a specific embodiment of the present invention, when the electromagnetic signal test curve under equipment under test open state is contrasted with the background electromagnetic signal testing curve under equipment under test off-mode；Select a certain frequency FS in the electromagnetic signal test curve under equipment under test open state, in background electromagnetic signal testing curve under equipment under test off-mode, in a certain seeking scope near corresponding frequency, (namely seeking scope is that this scope FN of FS ± FN can be configured as the parameter of an adjustment, require that as FN=0 frequency to be strictly directed at) search maximum, this maximum is compared as with the value corresponding for frequency FS in the electromagnetic signal test curve under equipment under test open state.
When signal generation aliasing, according to a specific embodiment of the present invention, need two ripple each frequencies peak-to-peak will compare as signal frequency point, when signal is be more than or equal to default snr threshold, corresponding frequency is retained, when signal is less than default snr threshold, corresponding frequency is carried out the peak process that disappears.
According to a specific embodiment of the present invention, described in the peak that disappears process to be specially and choose this frequency to the left side trough of induction signal and right side trough；Left side trough is chosen for left side end points；Right side trough is chosen for right side end points；The data of the data linear interpolation between left side end points and right side end points are replaced.
Step S306: extract detection signal；
In order to extract detection signal from complex environment level, it is necessary to automatically extract out possible signal frequency from test result to carry out feature extraction.
According to a specific embodiment of the present invention, described step S306: extract detection signal and farther include:
Step S3060: judge that whether current frequency is last frequency；If it is not, then go to step S3051, if it is, go to step S3060；
Step S3061: judge whether the signal that this frequency is corresponding is crest signal, namely more than the level magnitude of left and right frequency；If it is, enter step S3052, if it is not, then enter step S3055；
Step S3062: judge the valley value relative to left and right, whether the amplitude at this frequency place all at least exceeds amplitude P (namely meeting the requirement of certain signal to noise ratio) than two, left and right trough simultaneously；If it is, go to step S3066；If it is not, then go to step S3053；
S3063: judge whether crest at least exceeds amplitude P than one of them valley value in the trough of two, left and right；If it is, go to step S3054；If it is not, then go to S3055；
Step S3064: judge, in the trough side being unsatisfactory at least exceeding amplitude P, whether neighbouring exist the trough satisfied condition less than frequency FM place；If it has, then go to step S3056；If it is not, go to step S3055；Described frequency FM can be configured as required；
Step S3065: abandon this frequency；Go to step S3059；
Step S3066: record this frequency；Judge whether this frequency place occurs RBW to change, if it is, go to step S3057；If it is not, then go to step S3058；
Go to step S3067, abandon this frequency；Go to step S3059；
Step S3068: record this frequency；Go to step S3059；
Step S3069: go to next frequency, and be back to step S3050；
Step S3070: extract all frequencies of current record, the frequency of current all records is chosen for signal frequency point；
Go to step S307；
Step S307: the electromagnetic signal test curve of equipment under test and testing standard ultimate value curve are compared, generates test report.
Step S400: terminate.
According to a specific embodiment of the present invention, for the ease of operation, here the mode that the electromagnetic signal test curve of equipment under test and testing standard ultimate value curve are carried out to be bound is taken, namely its unique corresponding standard state curve is searched for by the major parameter (such as the title of equipment under test, tranmitting frequency, transmitting power) of the electromagnetic signal test curve of equipment under test, when user's Selection and call button, read in by testing standard ultimate value curve, and and the electromagnetic signal test curve of equipment under test be shown in same curve chart.After testing standard ultimate value curve reads in, in order to help user to judge failure condition, necessary comparison instrument can be provided, frequency and the range value of each curve is shown on the one hand by vernier, and demonstrate the difference investigated between curve and standard curve, hiding and display state of each curve can be controlled on the other hand.Compare for the ease of user, it is also possible to call other test curves and together show.Calling also is screen data of interest by arranging search condition, is loaded in curve chart after choosing.
The above, it it is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, without departing within the scope of technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is the content without departing from technical solution of the present invention, according to any simple modification that above example is made by the technical spirit of the present invention, equivalent variations and modification, all still fall within the scope of technical solution of the present invention.
Claims (10)
1. a Portable electromagnetic compatibility detection equipment, including:
Main frame, is used for measuring electromagnetic signal, and is compared with the Electromagnetic Launching signal under normal condition by the Electromagnetic Launching signal under Devices to test malfunction, generate examining report；
Memory module, for storing the data needing to use in detection process；
Power supply, for powering for detection equipment；
Man-machine interface, is used for realizing man machine interface information mutual；Described man-machine interface includes display, is used for showing test data and keyboard, is used for inputting data or instruction；
Receive unit, for receiving the electromagnetic signal that Devices to test is launched；Described reception unit comprises further:
One or more test antennas, for receiving the radiation signal that Devices to test is launched on certain distance, and are sent to main frame by received signal；
One or more current probes, for receiving the conducted signal that equipment is launched in the fixed position of Devices to test interconnecting cable, and are sent to main frame by received signal；
One or more near field probes, for receiving the electromagnetic signal of leakage on the internal board of Devices to test, and are sent to main frame by the signal gathered；
Radio frequency connector, is used for connecting radio-frequency cable and receiving unit；
Radio-frequency cable, for being connected reception unit with main frame by radio frequency connector；
Antenna spider, for being fixed installation by antenna；
Equipment containing box, is used for receiving described main frame, memory module, power supply, radio frequency connector, radio-frequency cable and antenna spider.
2. Portable electromagnetic compatibility according to claim 1 detection equipment, it is characterised in that:
Described near field probes has fixing device, for described near field probes being fixed and the internal board of Devices to test being measured；Thus can by tested equipment electromagnetic compatibility mal function point location to board level.
3. Portable electromagnetic compatibility according to claim 1 and 2 detection equipment, it is characterised in that:
Described main frame farther includes:
Interference noise background cancellation module, for eliminating the background noise of test site；
Detection signal extraction module, for extracting detection signal from ambient level；
Measurement module, is used for measuring electromagnetic signal；
Electromagnetic compatibility diagnostic analysis module；For being compared with the Electromagnetic Launching signal under normal condition by the Electromagnetic Launching signal under Devices to test malfunction, generate examining report.
4. the detection method according to the arbitrary described Portable electromagnetic compatibility detection equipment of claim 1-3, comprises the steps of
Step S0: start powers on；
Step S1: login username and password；
Step S2: selecting action type, described action type includes but not limited to: SIM system information management type, data management type；Electromagnetic compatibility detection type；
Step S3: when the action type selected is SIM system information management type, enter step S100；When the action type selected is data management type, enter step S200；When the action type selected is electromagnetic compatibility detection type, enter step S300；
Step S100: judge whether active user has SIM system information management authority；Without authority, then enter step S101；If had permission, then enter step S102；
Step S101: user is without current operation authority in prompting, and current operation is exited in prompting user's selection or action type is revised in return；If user selects to exit, then enter step S400；If user selects to return amendment action type, then return step S2；
Step S102: select system management messages action type；Described system management messages action type includes but not limited to: user manages action type；Test device management operations type；Equipment under test management action type；Ultimate value curve management action type；
Step S103: when the system management messages action type selected manages action type for user, enter step S1001；When the system management messages action type selected is for test device management operations type, enter step S1002；When the system management messages action type selected is equipment under test management action type, enter step S1003；Step S1004 is entered when the system management messages action type selected is ultimate value curve management action type；
Step S1001: user profile is managed, includes but not limited to: adds, revises or delete user；Step S1005 is entered after having operated；
Step S1002: test equipment is managed, includes but not limited to: add, edit, delete information and the parameter of test equipment；Step S1005 is entered after having operated；
Step S1003: tested equipment is managed, includes but not limited to: add, edit, delete tested equipment；Step S1005 is entered after having operated；
Step S1004: ultimate value curve is managed, includes but not limited to: add, edit, delete testing standard ultimate value curve；Step S1005 is entered after having operated；
Step S1005: judge whether to exit current operation, if yes then enter step S400；If it is not, then return step S2；
Step S200: judge whether active user has data administration authority；Without authority, then enter step S101；If had permission, then enter step S202；
Step S202: carry out testing the search of data according to tester, testDate, tested equipment, test checking and deleting of data；
Step S203: judge whether to exit current operation, if yes then enter step S400；If it is not, then return step S2；
Step S300: judge whether active user has electromagnetic compatibility detection authority；Without authority, then enter step S301；If had permission, then enter step S302；
Step S301: user is without current operation authority in prompting, and current operation is exited in prompting user's selection or action type is revised in return；If user selects to exit, then enter step S400；If user selects to return amendment action type, then return step S2；
Step S302: Detection task is set；
Step S303: obtain the background electromagnetic signal under equipment under test off-mode；
Step S304: obtain the electromagnetic signal under equipment under test open state；
Step S305: eliminate ambient interferences；
Step S306: extract detection signal；
Step S307: the electromagnetic signal test curve of equipment under test and testing standard ultimate value curve are compared, generates test report.
Step S400: terminate.
5. one kind according to the detection method described in 4, it is characterised in that:
Step S1: login username and password, particularly as follows:
If user name or code error, point out and re-enter, if it is still incorrect to re-enter number of times arrival pre-determined number, then described detection equipment is locked the scheduled time, forbid register.
6. the detection method according to 4 or 5, it is characterised in that:
Performing described step S303: obtain the background electromagnetic signal under equipment under test off-mode；And step S304: when obtaining the electromagnetic signal under equipment under test open state, it is necessary to keep twice test parameter to arrange completely the same, make data have comparability；Described test parameter equipment includes but not limited to: resolve bandwidth RBW, decay, frequency step.
7. one kind according to the arbitrary described detection method of 4-6, it is characterised in that:
Described step S305: eliminate ambient interferences；It is specially；
It is whether the Electromagnetic Launching of equipment itself by a certain frequency of background signal identification decision, if it is not, then carry out Processing for removing；
Described background signal identification is particularly as follows: contrast the electromagnetic signal test curve under equipment under test open state with the background electromagnetic signal testing curve under equipment under test off-mode；Determine that the crest signal that in the electromagnetic signal under equipment under test open state, which frequency is corresponding is caused by background electromagnetic signal；Choose this frequency to the left side trough of induction signal and right side trough；Left side trough is chosen for left side end points；Right side trough is chosen for right side end points；The data of the data linear interpolation between left side end points and right side end points are replaced.
8. one kind according to the arbitrary described detection method of 4-7, it is characterised in that:
Described step S306: extract detection signal and farther include:
Step S3060: judge that whether current frequency is last frequency；If it is not, then go to step S3051, if it is, go to step S3060；
Step S3061: judge whether the signal that this frequency is corresponding is crest signal, namely more than the level magnitude of left and right frequency；If it is, enter step S3052, if it is not, then enter step S3055；
Step S3062: judge the valley value relative to left and right, whether the amplitude at this frequency place all at least exceeds amplitude P (namely meeting the requirement of certain signal to noise ratio) than two, left and right trough simultaneously；If it is, go to step S3066；If it is not, then go to step S3053；
S3063: judge whether crest at least exceeds amplitude P than one of them valley value in the trough of two, left and right；If it is, go to step S3054；If it is not, then go to S3055；
Step S3064: judge, in the trough side being unsatisfactory at least exceeding amplitude P, whether neighbouring exist the trough satisfied condition less than frequency FM place；If it has, then go to step S3056；If it is not, go to step S3055；Described frequency FM can be configured as required；
Step S3065: abandon this frequency；Go to step S3059；
Step S3066: record this frequency；Judge whether this frequency place occurs RBW to change, if it is, go to step S3057；If it is not, then go to step S3058；
Go to step S3067, abandon this frequency；Go to step S3059；
Step S3068: record this frequency；Go to step S3059；
Step S3069: go to next frequency, and be back to step S3050；
Step S3070: extract all frequencies of current record, the frequency of current all records is chosen for signal frequency point；
Go to step S307.
9. one kind according to the arbitrary described detection method of 4-8, it is characterised in that:
When electromagnetic signal test curve under equipment under test open state is contrasted with the background electromagnetic signal testing curve under equipment under test off-mode；Select a certain frequency FS in the electromagnetic signal test curve under equipment under test open state, background electromagnetic signal testing curve under equipment under test off-mode searches maximum in a certain seeking scope near corresponding frequency, this maximum is compared as with the value corresponding for frequency FS in the electromagnetic signal test curve under equipment under test open state.
10. one kind according to the arbitrary described detection method of 4-9, it is characterised in that:
When signal generation aliasing, needing two ripple each frequencies peak-to-peak will compare as signal frequency point, when signal is be more than or equal to default snr threshold, corresponding frequency is retained, when signal is less than default snr threshold, corresponding frequency is carried out the peak process that disappears；
The described peak that disappears processes to be specially chooses this frequency to the left side trough of induction signal and right side trough；Left side trough is chosen for left side end points；Right side trough is chosen for right side end points；The data of the data linear interpolation between left side end points and right side end points are replaced.
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