CN109059965A - A kind of detection system and method for navigation equipment - Google Patents
A kind of detection system and method for navigation equipment Download PDFInfo
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- CN109059965A CN109059965A CN201811184714.7A CN201811184714A CN109059965A CN 109059965 A CN109059965 A CN 109059965A CN 201811184714 A CN201811184714 A CN 201811184714A CN 109059965 A CN109059965 A CN 109059965A
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- 238000003780 insertion Methods 0.000 description 5
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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Abstract
The embodiment of the invention discloses a kind of detection system of navigation equipment and methods, comprising: acquisition playback apparatus, signal distribution link, camera bellows and main control computer；It includes power splitter, adjustable attenuator and antenna that signal, which distributes link,；The input terminal of the signal output end and power splitter that acquire playback apparatus connects, and each output end of power splitter is connect with the input terminal of an adjustable attenuator；Camera bellows includes radio frequency adapter and communication adapter, setting navigation equipment to be measured in camera bellows, radio frequency adapter is connect inside camera bellows with antenna, radio frequency adapter is connect outside camera bellows with the output end of an adjustable attenuator, communication adapter is connect inside camera bellows with navigation equipment communication terminal to be measured, and communication adapter is connect outside camera bellows with the first communication terminal of main control computer；The controlled end of acquisition playback apparatus is connect with the second communication terminal of main control computer, and the technical solution of the embodiment of the present invention is, it can be achieved that simply, quickly and accurately carry out batch detection to navigation equipment.
Description
Technical field
The present embodiments relate to detection technique field more particularly to the detection systems and method of a kind of navigation equipment.
Background technique
In recent years, it flourishes by the Beidou satellite navigation application industry of core of navigation equipment, improves navigation equipment
Detectability has become an important factor for support satellite navigation application industry orderly development.
In the prior art, the detection system of navigation equipment generally uses separate unit serially test mode, or utilizes complexity
Parallel circuit system carries out multi-way detecting, also, the camera bellows that navigation equipment is not shielded in open space or generally completely is inscribed
By signal.
Above-mentioned separate unit serial sensing system is not able to satisfy the demand of batch detection, and detection efficiency is low, and Multi-path detecting system
Due to links complexity, integrated level is poor, it is difficult to large-scale promotion, meanwhile, navigation equipment is not shielded completely in open space or
The camera bellows covered is inscribed to be easy to receive external signal interference by signal, influences the accuracy of testing result.
Summary of the invention
The present invention provides the detection system and method for a kind of navigation equipment, simply, is quickly and accurately set to navigation with realizing
It is standby to carry out batch detection.
In a first aspect, the embodiment of the invention provides a kind of detection systems of navigation equipment, comprising: acquisition playback apparatus, letter
Number distribution link, camera bellows and main control computer；
The signal distribution link includes power splitter, adjustable attenuator and antenna；The signal output of the acquisition playback apparatus
End is connect with the input terminal of the power splitter, the input terminal of each output end of the power splitter and an adjustable attenuator
Connection；The camera bellows includes radio frequency adapter and communication adapter, and setting navigation equipment to be measured, the radio frequency turn in the camera bellows
Connector is connect inside the camera bellows with the antenna, and the radio frequency adapter described adjustable declines outside the camera bellows with one
Subtract the output end connection of device, the communication adapter is connect inside the camera bellows with the navigation equipment communication terminal to be measured, institute
Communication adapter is stated to connect outside the camera bellows with the first communication terminal of the main control computer；It is described acquisition playback apparatus by
Control end is connect with second communication terminal of main control computer.
Second aspect, the embodiment of the invention also provides a kind of detection methods of navigation equipment, including；
The signal for acquiring playback apparatus output is divided into multichannel link signal by power splitter, link signal described in every road passes through
After adjustable attenuator carries out preset gain adjusting, the antenna to camera bellows is exported through radio frequency adapter；
The link signal is emitted by the antenna into the camera bellows space；
The navigation equipment to be measured being set in the camera bellows receives the link signal of the antenna transmitting；
The navigation equipment to be measured handles the link signal received, and by treated, the link signal passes through institute
The communication adapter stated on camera bellows is transferred to main control computer；
The main control computer resolves the navigation equipment to be measured link signal that sends that treated；
Preset threshold information in the information calculated according to the main control computer and the main control computer, determines institute
State the testing result of navigation equipment to be measured.
The present invention passes through the input terminal that will acquire the signal output end connection power splitter of playback apparatus, each output of power splitter
The input terminal of one adjustable attenuator of end connection；Outside the antenna and camera bellows inside radio frequency adapter connection camera bellows on camera bellows
Adjustable attenuator, the master control outside the navigation equipment communication terminal and camera bellows to be measured inside communication adapter connection camera bellows on camera bellows
First communication terminal of computer；The controlled end for acquiring playback apparatus connects the second communication terminal of main control computer, leads to form one kind
The detection system for equipment of navigating, it is low to solve the serial navigation equipment detection system detection efficiency of separate unit, traditional Multi-path detecting system knot
Structure is complicated, and integrated level is poor, it is difficult to large-scale promotion, and navigation equipment is not inscribed in the camera bellows shielded completely and is be easy to cause by signal
The problem of testing result inaccuracy realizes effect simple, that batch detection is quickly and accurately carried out to navigation equipment.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the detection system for navigation equipment that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow chart of the detection method of navigation equipment provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of flow chart of the detection method for navigation equipment that the embodiment of the present invention three provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of structural schematic diagram of the detection system for navigation equipment that the embodiment of the present invention one provides, the present embodiment
It is applicable to the case where batch detection is carried out to navigation equipment, the detection system of the navigation equipment includes acquisition playback apparatus 1, signal
Distribute link 2, camera bellows 3 and main control computer 4.
It includes power splitter 21, adjustable attenuator 22 and antenna 23 that signal, which distributes link 2,；Acquire the signal output of playback apparatus 1
End is connect with the input terminal of power splitter 21, and each output end of power splitter 21 is connect with the input terminal of an adjustable attenuator 22；
Camera bellows 3 includes radio frequency adapter 31 and communication adapter 32, and setting navigation equipment 5 to be measured in camera bellows, radio frequency adapter 31 is dark
3 inside of case is connect with antenna 23, and radio frequency adapter 31 is connect in 3 outside of camera bellows with the output end of an adjustable attenuator 22, is led to
News adapter 32 is connect in 3 inside of camera bellows with 5 communication terminal of navigation equipment to be measured, and communication adapter 32 is in 3 outside of camera bellows and master control
First communication terminal of computer 4 connects；The controlled end of acquisition playback apparatus 1 is connect with 4 second communication terminal of main control computer.
Wherein, acquisition playback apparatus 1 is a kind of radiofrequency signal high-fidelity record and playback apparatus, can acquire actual scene
Navigation signal, and playback repeatedly is carried out in laboratory, construct indoor actual signal test scene；Signal distribution chain
Road is used to acquire the signal that playback apparatus 1 exports and is divided into multichannel stabilization and consistent link signal；Camera bellows 3 is outer for providing exclusion
The shielding space of boundary's electromagnetic interference can exclude other factors when navigation equipment 5 to be measured receives link signal in camera bellows 3
Influence, to accurately determine the testing result of navigation equipment 5 to be measured；Main control computer 4 is used to control the detection of navigation equipment
System resolves the navigation equipment 5 to be measured link signal that sends that treated, and the final detection for providing navigation equipment 5 to be measured is tied
Fruit.
Signal distribution link includes power splitter 21, adjustable attenuator 22 and antenna 23, and power splitter 21 for that will input all the way
Signal energy is divided into the equal output signal energy of multichannel, in order to improve the efficiency of 5 batch detection of navigation equipment to be measured, Ke Yixuan
The power splitter that output port is more, such as power splitter 21 is taken to choose one point of eight power splitter；Adjustable attenuator 22 is a kind of for drawing
Enter the circuit devcie for making a reservation for decaying, since there are line loss and interference, the link signal for causing power splitter 21 to export is being transmitted
When to antenna 23, each road link signal may have larger difference, at this point, being believed using adjustable attenuator 22 each road link
It number is adjusted, to guarantee that link signal is stable and consistent, such as it is 0-60dB that adjustable attenuator 22, which chooses adjustable extent, sensitive
Degree is the attenuator of 1dB, guarantees that radio frequency network Insertion Loss is consistent by adjusting adjustable attenuator 22, so that between any two-way link
Insertion loss difference be no more than 0.5dB, 22 fading gain of adjustable attenuator be arranged by line influence, once in detection system
In, place on line is fixed, then adjustable attenuator 22 only needs adjustment once i.e. reusable；In the present embodiment, antenna 23 can be with
Passive antenna is selected, for emitting link signal in camera bellows 3.
Camera bellows 3 includes that radio frequency adapter 31 and communication adapter 32 turn for connecting inside and the external devices of camera bellows 3
The type of attachment of connector reduces is arranged the external electromagnetic interference that hole introduces directly on camera bellows 3, increases the shielding of camera bellows 3
Effect is put into antenna 23 is whole in camera bellows 3, reduces the link interference between each road antenna 23, and 23 play signal of antenna
Path orthogonal is in 3 inner bottom surface of camera bellows.The controlled end of acquisition playback apparatus 1 is connect with 4 second communication terminal of main control computer, for leading
It controls the control of computer 4 acquisition playback apparatus 1 output and stops output signal.
The technical solution of the present embodiment passes through the input terminal that will acquire the signal output end connection power splitter of playback apparatus, function point
Each output end of device connects the input terminal of an adjustable attenuator；The antenna inside radio frequency adapter connection camera bellows on camera bellows
With the adjustable attenuator outside camera bellows, navigation equipment communication terminal to be measured inside communication adapter connection camera bellows on camera bellows and dark
First communication terminal of the main control computer outside case；The controlled end for acquiring playback apparatus connects the second communication terminal of main control computer, from
And a kind of detection system of navigation equipment is formed, it is low to solve the serial navigation equipment detection system detection efficiency of separate unit, and tradition is more
Structure is complicated for road detection system, and integrated level is poor, it is difficult to large-scale promotion, and navigation equipment does not receive in the camera bellows shielded completely
Signal be easy to cause the problem of testing result inaccuracy, realizes and simply, quickly and accurately carries out batch detection to navigation equipment
Effect.
Optionally, camera bellows 3 further includes power supply adapter, be connected to navigation equipment 5 to be measured power end and external power supply it
Between.
Wherein, power supply adapter is used to connect the power end and external power supply of navigation equipment 5 to be measured, when for continuance test
Between navigation equipment to be measured 5 longer or without charge function, need power supply line to connect external power supply, and power supply adapter can
To be separately provided, setting can also be merged with communication adapter 32, the navigation equipment to be measured separated for communication terminal with power end
5, it needs for power supply adapter and communication adapter 32 to be separately provided；The navigation equipment to be measured merged for communication terminal with power end
5, that is, the navigation equipment to be measured 5 for electric communication wire can be used, need to merge power supply adapter with communication adapter 32
Setting.
In this optional technical solution, the power supply for connecting navigation equipment to be measured using power supply adapter on camera bellows is provided
The mode at end and external power supply reduces and the external electromagnetic interference that hole introduces is arranged directly on camera bellows, increases camera bellows
Shield effectiveness.
Optionally, 3 inner bottom surface of camera bellows is provided with absorbing material.
Wherein, absorbing material only is set in the bottom of camera bellows 3, absorbing material projects it for absorbing or substantially weakening
The electromagnetic wave energy on surface, to reduce the interference of electromagnetic wave, absorbing material is inhaled including but not limited to carbon system absorbing material, iron series
Wave material, ceramics system absorbing material and other kinds of material, such as conducting polymer, chiral material, plasma material are inhaled
The shape of wave material including but not limited to wedge shape, single layer is plate shaped, bilayer or multilayer is plate shaped, coating shape and structure shape.
Inside and external devices due to the type of attachment connection camera bellows 3 using adapter, shield external electromagnetic interference, in camera bellows 3
Portion is in addition to the link signal that antenna 23 plays, scattering source and refraction source without other electromagnetic waves, therefore not in the private side of camera bellows 3
Absorbing material is arranged in wall, increases the space that navigation equipment 5 to be measured is placed in camera bellows 3.
In this optional technical solution, the camera bellows structure in camera bellows inner bottom surface setting absorbing material is provided, is being absorbed
While scattering and refraction interference that the link signal that antenna plays generates, the space for placing navigation equipment to be measured is increased.
Optionally, it is connected between power splitter 21 and adjustable attenuator 22 by coaxial cable in signal distribution link, it is described
Connected between adjustable attenuator 22 and the radio frequency adapter 31 by coaxial cable, the radio frequency adapter 31 and antenna 23 it
Between pass through coaxial cable connect.
In this optional technical solution, each device, coaxial cable are connected using coaxial cable in signal distribution link
In metallic shield net can be used as the gauze screen of signal, inhibit interference of the electromagnetic noise to signal, to guarantee the one of signal
Cause property, keeps the testing result of navigation equipment to be measured more accurate.
Embodiment two
Fig. 2 is a kind of flow chart of the detection method of navigation equipment provided by Embodiment 2 of the present invention, and the present embodiment can fit
The case where for carrying out batch detection to navigation equipment, this method can be executed by the detection system of above-mentioned navigation equipment.
The method of the present embodiment specifically comprises the following steps:
The signal for acquiring playback apparatus output is divided into multichannel link signal, every road link signal by power splitter by step 210
After adjustable attenuator carries out preset gain adjusting, the antenna to camera bellows is exported through radio frequency adapter.
Wherein, acquisition playback apparatus is used to play back the navigation signal of collected actual scene, and power splitter will be for that will acquire back
The navigation signal all the way for putting instrument playback is divided into the equal link signal of multiple-channel output, increases the navigation signal under actual scene
Quantity, in order to detect more navigation equipments to be measured simultaneously, due to there are line loss and interfering with each other, each road link signal
Insertion loss may have a larger difference, therefore every road link signal is subjected to preset gain adjusting by adjustable attenuator,
To guarantee the stability and consistency of link signal, such as adjusted so that any two-way chain by the preset gain of adjustable attenuator
Insertion loss difference between road is no more than 0.5dB, will stablize and consistent link signal is exported through radio frequency adapter to camera bellows
Interior antenna.
Step 220, link signal are emitted by antenna into camera bellows space.
Wherein, antenna is passive antenna, and is fully located inside camera bellows, and the link interference between each road antenna, day are reduced
The path orthogonal of line play signal increases the intensity that navigation equipment to be measured receives signal in camera bellows inner bottom surface, reduces dark
The refracted signal of case internal side wall.
The link signal that step 230, the navigation equipment receiving antenna to be measured being set in camera bellows emit.
Wherein, due to the complete shield effectiveness of camera bellows, the navigation equipment to be measured link that receiving antenna emits in camera bellows letter
Number when, shield the electromagnetic interference outside camera bellows completely, the signal for receiving navigation equipment to be measured is entirely the chain of antenna transmitting
Road signal.
The link signal that step 240, navigation equipment to be measured processing receive, by treated, link signal passes through on camera bellows
Communication adapter be transferred to main control computer.
Wherein, navigation equipment to be measured and main control computer are connect by communicating adapter, and navigation equipment to be measured is to receiving
Link signal handled, processing result is transferred to main control computer.
Step 250, main control computer resolve the navigation equipment to be measured link signal that sends that treated.
Wherein, main control computer calculate can be used to measure navigation equipment to be measured whether He Ge information.
Preset threshold information in step 260, the information calculated according to main control computer and main control computer, determine to
Survey the testing result of navigation equipment.
Wherein, by main control computer calculate can be used to measure navigation equipment to be measured whether He Ge information with it is preset
Threshold information is compared, and determines whether navigation equipment to be measured is qualified.
The technical solution of the present embodiment is by being divided into multichannel link signal for the signal for acquiring playback apparatus using power splitter, benefit
Consistent and glitch-free link signal is provided with adjustable attenuator and completely shielding camera bellows to receive for navigation equipment to be measured, and
Navigation equipment to be measured is resolved treated link signal by main control computer, the testing result of navigation equipment to be measured is determined, solves
Separate unit serial navigation equipment detection system detection efficiency is low, and structure is complicated for traditional Multi-path detecting system, and integrated level is poor, it is difficult to big
Scale is promoted, and navigation equipment is in the inscribed problem for being be easy to cause testing result inaccuracy by signal of the camera bellows shielded completely,
Realize effect simple, that batch detection is quickly and accurately carried out to navigation equipment.
Embodiment three
Fig. 3 is a kind of flow chart of the detection method for navigation equipment that the embodiment of the present invention three provides, and the present embodiment is upper
It is further refined on the basis of one embodiment, provides and preset in the information and main control computer calculated according to main control computer
Threshold information, determine the specific implementation step before and during the testing result of navigation equipment to be measured.Below with reference to Fig. 3 to this
A kind of detection method for navigation equipment that inventive embodiments three provide is illustrated, comprising the following steps:
The signal for acquiring playback apparatus output is divided into multichannel link signal, every road link signal by power splitter by step 310
After adjustable attenuator carries out preset gain adjusting, the antenna to camera bellows is exported through radio frequency adapter.
Step 320, link signal are emitted by antenna into camera bellows space.
The link signal that step 330, the navigation equipment receiving antenna to be measured being set in camera bellows emit.
The link signal that step 340, navigation equipment to be measured processing receive, by treated, link signal passes through on camera bellows
Communication adapter be transferred to main control computer.
Step 350, main control computer resolve the navigation equipment to be measured link signal that sends that treated.
Preset threshold information in step 360, setting main control computer, wherein preset threshold value letter in main control computer
Breath includes: miss-threshold and targets threshold range.
Wherein, when miss-threshold is used to determine that navigation equipment to be measured handles the link signal received, if there are data
Lose excessive situation；There is no numbers for determining the link signal received when navigation equipment to be measured processing for targets threshold range
When according to losing excessive situation, whether the information of processing is accurate, the setting of miss-threshold and targets threshold range and master control meter
The examination criteria of information type and navigation equipment to be measured that calculation machine calculates is related.
Step 370 judges whether missing value is more than miss-threshold in information that main control computer calculates.
For example, during atual detection, when detecting the information for the 60s that main control computer calculates, miss-threshold is arranged
For 6s, that is, judge in the information for the 60s that main control computer calculates, whether the information time total length of loss is more than 6s.
If missing value is more than miss-threshold in step 380, information, the information that this time main control computer calculates does not conform to
Lattice determine that navigation equipment to be measured is unqualified.
Wherein, if missing value is more than miss-threshold in information, it is believed that navigation equipment to be measured handles the link signal received
When, there is a situation where that loss of data is excessive, then the testing result of navigation equipment to be measured is unqualified.
If missing value is less than miss-threshold in step 390, information, the information that this time main control computer calculates is closed
Lattice will compare according to the calculated target value of information and targets threshold range, and judge whether target value will be in targets threshold range
It is interior.
Wherein, if missing value is less than miss-threshold in information, it is believed that the link letter that navigation equipment processing to be measured receives
Number when, there is no the situations that loss of data is excessive, then the accuracy of link signal navigation equipment to be measured processing received into
Row judgement, the calculated target value of main control computer and targets threshold range are compared, when main control computer calculates target value,
The missing value in the information calculated in step 370 should be removed, using the remaining information with calculating meaning as calculating target value
Basis.Such as when judging whether navigation equipment to be measured is qualified using signal-to-noise ratio, setting signal-to-noise ratio targets threshold range is
SNR, wherein SNR is signal-to-noise ratio, and the missing value in signal-tonoise information calculated in step 370 is 5s, and main control computer is being counted
When calculating signal-to-noise target value, the signal-tonoise information missing value of above-mentioned 5s should be removed, using remaining signal-tonoise information as calculating noise
Than the basis of target value, then judge the calculated signal-to-noise target value of main control computer whether in signal-to-noise ratio targets threshold range
It is interior.
If step 3100, target value are within the scope of targets threshold, determine that navigation equipment to be measured is qualified.
Wherein, if target value is within the scope of targets threshold, then it is assumed that navigation equipment to be measured, which can accurately be handled, to be received
Link signal determines that navigation equipment to be measured is qualified.
If step 3110, target value are not within the scope of targets threshold, determine that navigation equipment to be measured is unqualified.
Wherein, if target value is not within the scope of targets threshold, then it is assumed that navigation equipment to be measured cannot accurately handle reception
The link signal arrived determines that navigation equipment to be measured is unqualified.
The technical solution of the present embodiment has carried out careful explanation on the basis of a upper embodiment, will be calculated according to master control
Preset threshold information in the information and main control computer that machine calculates, determines the testing result of navigation equipment to be measured, further
It is refined as specific implementation steps.Judge whether navigation equipment to be measured closes by setting miss-threshold and targets threshold range
Lattice, technical solution provided in this embodiment improve the accuracy for determining navigation equipment testing result to be measured, reduce signal and lose
Lost the influence of the testing result of multipair judgement navigation equipment to be measured.
Optionally, the signal for acquiring playback apparatus output is being divided into multichannel link signal, every road link letter by power splitter
Number by adjustable attenuator carry out preset gain adjusting after, before exporting the antenna to camera bellows through radio frequency adapter, further include
Main control computer control acquisition playback apparatus output signal.
Optionally, after main control computer resolves the navigation equipment to be measured link signal that sends that treated, further include
Main control computer control acquires playback apparatus and stops output signal.
Wherein, main control computer is connect with acquisition playback apparatus, control acquisition playback apparatus output signal and stopping output letter
Number, and when main control computer controls acquisition playback apparatus output signal, the intensity of acquisition playback apparatus output signal can also be adjusted,
To form the automation control to detection system.
In this optional technical solution, provides control acquisition playback apparatus output signal and stops the scheme of output signal,
Reduce manual operation step, realizes automatic detection.
Optionally, before main control computer resolves the navigation equipment to be measured link signal that sends that treated, further includes:
The model of navigation equipment to be measured and the board model of navigation equipment to be measured are set on main control computer；
Main control computer initializes and connects the board of navigation equipment；
Main control computer request saves and shows the navigation equipment to be measured link signal that sends that treated.
Wherein, main control computer needed before resolving the navigation equipment to be measured link signal that sends that treated with it is to be measured
Navigation equipment carries out communication connection, and main control computer is allow to send request of data to navigation equipment to be measured, meanwhile, navigation to be measured
Equipment can send treated link signal to main control computer, to realize real-time communication according to request of data.
In this optional technical solution, provides main control computer and navigation equipment to be measured carries out the specific step of communication connection
Suddenly, main control computer and the real-time communication function of navigation equipment to be measured in the detection process be ensure that, detection efficiency is improved.
Specifically, illustrating the skill of the present embodiment for judging navigation equipment testing result to be measured using signal-tonoise information
Art scheme.Using one point of eight power splitter, the adjustable extent of adjustable attenuator is 0-60dB, sensitivity 1dB, camera bellows inner bottom surface
Using carbon through-stone ink absorbing material, the shape of absorbing material is wedge shape, with the signal-to-noise ratio letter for the 60s that main control computer calculates
For breath as the information for judging navigation equipment testing result to be measured, setting signal-to-noise ratio miss-threshold is 6s, and signal-to-noise ratio target threshold is arranged
Value range is SNR.The signal for acquiring playback apparatus output is divided into eight road link signals, every road link letter by one point of eight power splitter
Number pass through adjustable attenuator, so that the insertion loss difference between any two-way link is no more than 0.5dB, every road link signal warp
Radio frequency adapter exports the passive antenna to camera bellows, and is emitted by passive antenna into camera bellows space, is set in camera bellows
Navigation equipment to be measured receive the link signal of passive antenna transmitting, the wedge shape graphite absorbing material of camera bellows inner bottom surface absorbs
The refraction and scattering electromagnetic wave that the link signal of passive antenna transmitting generates, the link letter that navigation equipment processing to be measured receives
Number, treated link signal is transferred to main control computer by the communication adapter on camera bellows, main control computer resolve to
It surveys navigation equipment and sends treated link signal, obtain corresponding signal-tonoise information, main control computer, which is chosen, to be calculated
The signal-tonoise information of 60s is as the information for judging navigation equipment testing result to be measured, for example, believing in the signal-tonoise information of 60s
It makes an uproar than being 5s for 0 information total length, that is, shows the when a length of 5s of dropout, be no more than signal-to-noise ratio miss-threshold, then remove
The information that signal-to-noise ratio is 0 in the signal-tonoise information of 60s calculates the average value of remaining signal-tonoise information, obtains signal-to-noise target value,
Signal-to-noise target value and signal-to-noise ratio targets threshold range are compared, for example, signal-to-noise target value is 48, in signal-to-noise ratio targets threshold
In range, then it is assumed that navigation equipment to be measured is qualified.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of detection system of navigation equipment characterized by comprising acquisition playback apparatus, signal distribution link, camera bellows and master
Control computer；
The signal distribution link includes power splitter, adjustable attenuator and antenna；It is described acquisition playback apparatus signal output end with
The input terminal of the power splitter connects, and the input terminal of each output end of the power splitter and an adjustable attenuator connects
It connects；The camera bellows includes radio frequency adapter and communication adapter, setting navigation equipment to be measured, the RF repeating in the camera bellows
Head connect inside the camera bellows with the antenna, the radio frequency adapter outside the camera bellows with an adjustable damping
The output end of device connects, and the communication adapter is connect inside the camera bellows with the navigation equipment communication terminal to be measured, described
Communication adapter is connect outside the camera bellows with the first communication terminal of the main control computer；It is described to acquire the controlled of playback apparatus
End is connect with second communication terminal of main control computer.
2. the detection system of navigation equipment according to claim 1, which is characterized in that the camera bellows further includes power supply transfer
Head is connected between the power end and external power supply of the navigation equipment to be measured.
3. the detection system of navigation equipment according to claim 1, which is characterized in that the camera bellows inner bottom surface is provided with
Absorbing material.
4. the detection system of navigation equipment according to claim 1, which is characterized in that described in the signal distribution link
It is connected between power splitter and the adjustable attenuator by coaxial cable, between the adjustable attenuator and the radio frequency adapter
It is connected by coaxial cable, is connected between the radio frequency adapter and the antenna by coaxial cable.
5. the detection system of navigation equipment according to claim 1, which is characterized in that further include that multiport USB turns serial ports
Hub is arranged in the communication adapter and connect it with the first communication terminal of the main control computer outside the camera bellows
Between.
6. a kind of detection method of navigation equipment, it is characterised in that, including；
The signal for acquiring playback apparatus output is divided into multichannel link signal by power splitter, link signal described in every road is by adjustable
After attenuator carries out preset gain adjusting, the antenna to camera bellows is exported through radio frequency adapter；
The link signal is emitted by the antenna into the camera bellows space；
The navigation equipment to be measured being set in the camera bellows receives the link signal of the antenna transmitting；
The navigation equipment to be measured handles the link signal received, will treated that the link signal passes through is described dark
Communication adapter on case is transferred to main control computer；
The main control computer resolves the navigation equipment to be measured link signal that sends that treated；
Preset threshold information in the information calculated according to the main control computer and the main control computer, determine it is described to
Survey the testing result of navigation equipment.
7. the detection method of navigation equipment according to claim 6, which is characterized in that calculated described according to the master control
Preset threshold information in information that machine calculates and the main control computer, determines the testing result of the navigation equipment to be measured
Before, further includes:
Preset threshold information in the main control computer is set, wherein preset threshold information packet in the main control computer
It includes: miss-threshold and targets threshold range；
Preset threshold information in the information calculated according to the main control computer and the main control computer, determines institute
State the testing result of navigation equipment to be measured, comprising:
Judge whether missing value is more than the miss-threshold in the information that the main control computer calculates；
If missing value is more than the miss-threshold in the information, the information that this time main control computer calculates is not
Qualification determines that the navigation equipment to be measured is unqualified；
If missing value is less than the miss-threshold in the information, this time information that calculates of described main control computer
Qualification will compare according to the calculated target value of the information and the targets threshold range, and judge whether the target value will be located
Within the scope of the targets threshold；
If the target value is within the scope of the targets threshold, determine that the navigation equipment to be measured is qualified；
If the target value is not within the scope of the targets threshold, determine that the navigation equipment to be measured is unqualified.
8. the detection method of navigation equipment according to claim 6, which is characterized in that in the letter that will acquire playback apparatus output
Number it is divided into multichannel link signal by power splitter, link signal described in every road carries out preset gain adjusting by adjustable attenuator
It afterwards, further include that the main control computer controls the acquisition playback apparatus before exporting the antenna to camera bellows through radio frequency adapter
Export the signal.
9. the detection method of navigation equipment according to claim 6, which is characterized in that resolve institute in the main control computer
Before stating the navigation equipment to be measured link signal that sends that treated, further includes:
The model of the navigation equipment to be measured and the board model of the navigation equipment to be measured are set on the main control computer；
The main control computer initializes and connects the board of the navigation equipment；
Main control computer request saves and shows the navigation equipment to be measured link signal that sends that treated.
10. the detection method of navigation equipment according to claim 6, which is characterized in that resolved in the main control computer
It further include acquisition described in the main control computer control after the navigation equipment to be measured sends that treated the link signal
Playback apparatus stops exporting the signal.
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