CN109975882A - A kind of detection device and rays safety detection apparatus - Google Patents
A kind of detection device and rays safety detection apparatus Download PDFInfo
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- CN109975882A CN109975882A CN201910351365.1A CN201910351365A CN109975882A CN 109975882 A CN109975882 A CN 109975882A CN 201910351365 A CN201910351365 A CN 201910351365A CN 109975882 A CN109975882 A CN 109975882A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/417—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section involving the use of neural networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
Abstract
The embodiment of the invention discloses a kind of detection device and rays safety detection apparatus, detection device includes: main control module, dangerous material detecting module and display module；Main control module is connect with dangerous material detecting module, display module；Dangerous material detecting module includes frequency modulation source module, frequency multiplication link module and signal acquisition module, and one end of frequency multiplication link module is connect with frequency modulation source module, and the other end of frequency multiplication link module is connect with signal acquisition module；Emit after the two-way terahertz wave signal frequency multiplication that frequency multiplication link module is used to send frequency modulation source module to target object, and output signal is obtained after being mixed the reflection echo signal of return with the other two-way terahertz wave signal that frequency modulation source module is sent, output signal is further transmitted to signal acquisition module.Rays safety detection apparatus is at least one of intelligent safety check robot, intelligent safety check cruiser and intelligent safety check instrument in the embodiment of the present invention, improves the intensity and range coverage of terahertz signal, and automatic recall rate and accuracy rate.
Description
Technical field
The present embodiments relate to safety check technical field more particularly to a kind of detection device and rays safety detection apparatus.
Background technique
The raising required with the development of science and technology with people for security protection, in the big public place of flow of the people, such as airport,
How railway station or subway etc. realize quick detection and identification to dangerous material, are the one of destination public safety field face
A important problem.
In the prior art, contactless humanbody safety check technology has metal detection door, the imaging of micro- X-ray dose, X-ray flying spot
Scanning backscattered imaging, mm-wave imaging, passive type terahertz imaging and active terahertz imaging etc..Wherein, metal detection
Door cannot detect nonmetallic contraband, and such as Stupalox, plastics gun and fatal explosive, while metal detection false-alarm is higher,
Hand-held metal detector need to be manually aided with to check, safety check inefficiency, labor intensity is higher；Micro- X-ray dose imaging technique and X
Although ray flying-spot scanner back scattering imaging technology good imaging quality, there are human body ionization radiation injury risks；Millimeter wave at
Although automatic identification highest recall rate only has 85%, also needs manually to be aided with reinspection, because by resolving power as technology is without ionising radiation
Limitation, image quality is difficult to meet the requirements；Passive type terahertz imaging safety check structure is simple, radiationless, non-contact and do not stop
It stays, but cannot be used for outdoor, to the environmental requirements such as room temperature, light height；Existing active THz imaging technology is not to having
There is the detection result accuracy rate in the opening place of clear feeder connection low.
Above-mentioned contactless humanbody safety check apparatus all need to carry out formula safety check in fixed security check passage, while also need to match
With the inspection of " searching the person " formula, not only working efficiency is lowly also accused of invasion of privacy, under big stream of people's background, to noncooperative target people
The accuracy rate that group carries out the unaware detection of dangerous material is not able to satisfy actual demand.
Summary of the invention
The embodiment of the present invention provides a kind of detection device and rays safety detection apparatus, with improve open area human body hidden dangerous goods without
The automatic recall rate and accuracy rate of perception detection and early warning.
The embodiment of the invention provides a kind of detection devices, including control module, dangerous material detecting module and display module；Its
In,
The main control module is connect with the dangerous material detecting module, the display module, for sending probe instructions extremely
The dangerous material detecting module, and receive detection data that the dangerous material detecting module returns and according to the detection data
Detection result is shown in the display module；
The dangerous material detecting module includes frequency modulation source module, frequency multiplication link module and signal acquisition module, the frequency multiplication
One end of link module is connect with the frequency modulation source module, the other end of the frequency multiplication link module and the signal acquisition module
Connection；
It is sent out after the two-way terahertz wave signal frequency multiplication that the frequency multiplication link module is used to send the frequency modulation source module
It is incident upon target object, and the other two-way terahertz wave signal that the reflection echo signal of return and the frequency modulation source module are sent
Output signal is obtained after being mixed, and the output signal is further transmitted to the signal acquisition module.
Further, the frequency multiplication link module includes that two-way transmitting frequency multiplication link and two-way receive frequency multiplication link.
Further, the two-way THz wave new signal includes first via linear FM signal and the second linear frequency modulation
Signal；
The transmitting frequency multiplication link includes power amplifier and transmitting antenna, for receiving the frequency modulation source module transmission
First via linear FM signal or the second linear FM signal, and by the first via linear FM signal or second tunnel
Linear FM signal is launched after being amplified by the power amplifier by the transmitting antenna.
Further, the other two-way terahertz wave signal includes the linear FM signal of third and the 4th linear tune
Frequency signal；
The reception frequency multiplication link includes receiving antenna and harmonic mixer, for receiving the frequency modulation source module transmission
The linear FM signal of third or the 4th linear FM signal and pass through the receiving antenna receive first via reflection echo
Signal or the second road reflection echo signal, and by the harmonic mixer by the linear FM signal of the third and described
Reflection echo signal or the 4th linear FM signal and second road reflection echo signal pass through the harmonic wave all the way
Frequency mixer is mixed, by after mixing the first output signal or the second output signal be sent to the signal acquisition module.
Further, the dangerous material detecting module further includes signal amplification filter module, the signal amplification filtering mould
One end of block is connect with the signal acquisition module, the other end and the reception frequency multiplication link of the signal amplification filter module
Harmonic mixer connection in module；
First output signal or second output signal that the signal amplification filter module is used to receive
After filtering and amplification, and obtains the detection data by analog-to-digital conversion and be sent to the signal acquisition module.
Further, the dangerous material detecting module further includes signal control module, one end of the signal control module
It is connected to the main control module, the other end of the signal control module is connect with the frequency modulation source module；
The signal control module is used to receive the probe instructions and running parameter that the main control module is sent, and receives institute
The detection data for stating signal acquisition module transmission carries out the detection data to be transmitted to the master control after Digital Signal Processing
Module.
Further, the main control module includes dangerous material processing identification module, and the dangerous material processing identification module is used
Target dangerous material detection model is inputted in the detection data that the reception dangerous material detecting module is sent, and by the detection data
In, detection result is obtained, the detection result is further sent to the display module and is shown.
Further, the target dangerous material detection model is trained neural network by sample echo reflection data
It obtains, the sample echo reflection data include the echo reflection data of different polarization directions.
Second aspect, the embodiment of the invention also provides a kind of rays safety detection apparatus, including safety check control module, laser radar mould
Block, interactive module and detection device as described above, the safety check control module respectively with the laser radar module, described
Interactive module, detection device connection.
Further, the rays safety detection apparatus is at least intelligent safety check robot, intelligent safety check cruiser and intelligent safety check instrument
One of.
Detection device provided in an embodiment of the present invention, main control module send probe instructions to dangerous material detecting module, danger
Product detecting module is based on the received four tunnels terahertz wave signal of frequency multiplication link module and carries out dangerous material detection to target object, and will
Detection data is back to main control module, and main control module shows detection result in display module according to the detection data received.This
Frequency multiplication link module in inventive embodiments receives frequency multiplication link modules using double hairs are double, compared to the prior art in frequency multiplication link
Module provides the terahertz signal of more polarization directions, improves the intensity and range coverage of the terahertz signal of transmitting,
And then improve the automatic recall rate and accuracy rate of open area human body hidden dangerous goods unaware detection and early warning.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the detection device that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram for another detection device that the embodiment of the present invention one provides.
Fig. 3 is the structural schematic diagram of rays safety detection apparatus provided by Embodiment 2 of the present invention.
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 the structural schematic diagram for the detection device that the embodiment of the present invention one provides, as shown in Figure 1, the detection device 10
It may include: main control module 11, dangerous material detecting module 12 and display module 13；Wherein, main control module 11 and dangerous material detect
Module 12, display module 13 connect, and for sending probe instructions to dangerous material detecting module 12, and receive dangerous material detecting module
12 return detection datas and according to detection data display module 13 show detection result；
Dangerous material detecting module 12 includes frequency modulation source module 121, frequency multiplication link module 122 and signal acquisition module 123, times
One end of frequency link module 122 is connect with frequency modulation source module 121, the other end and signal acquisition module of frequency multiplication link module 122
123 connections, the probe instructions for receiving main control module 11 carry out dangerous material detection, and detection data is sent to master control mould
Block 11；
Emit after the two-way terahertz wave signal frequency multiplication that frequency multiplication link module 122 is used to send frequency modulation source module 121
To target object, and the other two-way terahertz wave signal that the reflection echo signal of return and frequency modulation source module 121 are sent into
Output signal is obtained after row mixing, output signal is further transmitted to signal acquisition module 123.
Wherein, terahertz signal is also known as THz wave, and THz wave is one kind of electromagnetic wave, refers to that wavelength is arrived at 3 μm
Between 1000 μm, frequency 0.1THz-10THz, the electromagnetic wave between microwave and infrared ray.THz wave not only possess with
The identical rectilinear propagation of light also has penetrability similar with electric wave and absorbability.THz wave is to many dielectric materials and non-pole
Property liquid there is good penetrability, and energy is low, only a few milli electron-volts, therefore will not destroy tested substance.
Compared to the photon energy that X-ray has kiloelectron-volt, its energy is lower than the bond energy of various valence bonds, therefore it will not cause to have
Harmful electricity reaction.THz wave can penetrate the nonpolarity such as plastics, clothing, carton and nonmetallic materials easily, can effectively detect
The dangerous material such as package, gun, drugs, explosive in mail and clothes are ensconced with identifying.Therefore, terahertz is used in the present embodiment
Hereby signal is as dangerous material detectable signal.
Frequency modulation source module 121 is for providing four road terahertz signals, i.e. linear FM signal.Wherein two-way terahertz signal
Including first via linear FM signal and the second linear FM signal, in addition two-way terahertz signal includes third linear frequency modulation
Signal and the 4th linear FM signal.
Frequency multiplication link module 122, which is that double hairs are double, receives frequency multiplication link module, and referring to fig. 2, frequency multiplication link module 122 includes two-way
Emitting frequency multiplication link and two-way receives frequency multiplication link, above-mentioned two-way terahertz signal is inputted respectively in two-way transmitting frequency multiplication link,
In addition two-way terahertz signal inputs two-way respectively and receives in frequency multiplication link.Frequency multiplication link module 122 is used for frequency modulation source module
The 121 two-way linear FM signal frequencys multiplication sent are to setpoint frequency (setpoint frequency can be 0.14THz) according to minimum 6 degree of angle arteries and veins
Punching circulation transmitting is to target object, and the other two-way that the reflection echo signal of return and frequency modulation source module 121 are sent is linear
FM signal becomes narrowband intermediate frequency signal by amplifying, being mixed, removing dryness, simulating detuning, further by the defeated of narrowband intermediate frequency signal
Signal is transmitted to signal acquisition module 123 out.
Fig. 2 is the structural schematic diagram for another detection device that the embodiment of the present invention one provides.As shown in Fig. 2, each hair
Penetrating frequency multiplication link may include power amplifier 1221 and transmitting antenna 1222, for receiving the of the transmission of frequency modulation source module 121
Linear FM signal or the second linear FM signal all the way, and first via linear FM signal or the second linear frequency modulation are believed
Number by power amplifier 1221 amplify after launched by transmitting antenna 1222.Its intermediate power amplifier 1221 specifically uses
Amplifier can be set according to the actual situation, the power amplifier 1221 in the present embodiment be set as low frequency power amplification
Device.
Wherein, the polarization direction for the linear FM signal that the transmitting antenna 1222 of two-way transmitting frequency multiplication link emits can be set
It is set to difference, may be set to be identical.When polarization direction difference, the polarization direction of linear FM signal is horizontal all the way, separately
The polarization direction of linear FM signal is vertical all the way, can specifically be set according to the actual situation.Emitted by setting two-way
Frequency multiplication link can provide the terahertz signal of more polarization directions, improve the intensity and range of the terahertz signal of transmitting
Coverage.
Each reception frequency multiplication link may include receiving antenna 1223 and harmonic mixer 1224, for receiving FM source mould
The linear FM signal of third or the 4th linear FM signal that block 121 is sent, and the is received by receiving antenna 1223
Reflection echo signal or the second road reflection echo signal all the way, and pass through harmonic mixer 1224 for the linear FM signal of third
Pass through harmonic mixer with first via reflection echo signal or the 4th linear FM signal and the second road reflection echo signal
1224 are mixed, by after mixing the first output signal or the second output signal be sent to signal acquisition module 123.Into one
Step, the first output signal and the second output signal are sent to before signal acquisition module 123, can also pass through harmonic mixer
122, which carry out simulation, goes tiltedly to operate, and after so that the first output signal and the second output signal is become narrowband intermediate frequency signal, is sent to letter
Number acquisition module 123.
Wherein, reflection echo signal is that terahertz wave signal encounters the echo data fed back after object, such as can be, to
Human-body emitting terahertz wave signal receives the echo data of article scattering.After being reflected due to terahertz signal by target object, instead
The polarization direction for penetrating echo-signal may change, and receive polarization side respectively using two-way receiving antenna 1223 in the present embodiment
To vertical and polarization direction level reflection echo signal.In the present embodiment, the pole of first via reflection echo signal can be set
It is horizontal to change direction, the polarization direction of the second road reflection echo signal is vertical, and the pole of first via reflection echo signal also can be set
Change direction is vertical, and the polarization direction of the second road reflection echo signal is horizontal.
Further, transmitting antenna 1222 is related with operating distance with the beam angle of receiving antenna 1223.The present embodiment
In can according to need operating distance adjustment antenna beam angle, if such as operating distance be 100 meters, antenna can cover
One people, beam angle can be set to 1.1 degree.
Referring to fig. 2, include frequency multiplier 1225 in each frequency multiplication link in frequency multiplication link module 122, be used for frequency modulation
The frequency for the four linear FM signals that source module 121 is sent carries out the amplification of integral multiple.Optionally, two-way emits frequency multiplication link
The amplification factor of frequency multiplier 1225 can to receive the amplification factor of frequency multiplier 1225 of frequency multiplication link from two-way different, such as two
The amplification factor that road emits the frequency multiplier 1225 of frequency multiplication link can be 8 times, frequency before amplifying can for 17.05 ±
0.25GHz, the frequency after amplifying can be 136.4 ± 2.0GHz, and two-way receives the amplification of the frequency multiplier 1225 of frequency multiplication link
Multiple can be 4 times, and frequency before amplifying can be 17.05 ± 0.25GHz, the frequency after amplifying can for 68.2 ±
1.0GHz。
Further, dangerous material detecting module 12 can also include that signal amplifies filter module 124, signal amplification filtering mould
One end of block 124 is connect with signal acquisition module 123, and signal amplifies the other end of filter module 124 and receives frequency multiplication link mould
Harmonic mixer 1224 in block connects；The first output signal or second that signal amplification filter module 124 is used to receive
After output signal filtering and amplification, and obtains detection data by analog-to-digital conversion and be sent to signal acquisition module 123.
Further, dangerous material detecting module 12 can also include signal control module 125, signal control module 125
One end is connect with main control module 11, and the other end of signal control module 125 is connect with frequency modulation source module 121；Signal control module
125 for receiving the probe instructions and running parameter of the transmission of main control module 11, and receives the detection of the transmission of signal acquisition module 123
Data carry out detection data to be transmitted to main control module 11 after Digital Signal Processing.Wherein, signal control module 125 and letter
The connection of number acquisition module 123 can be realized by FPGA middle layer board (FPGA Mezzanine Card, FMC) interface.Letter
Number control module 125, which can pass through high performance digital signal to detection data and handle chip, carries out down coversion and down-sampled place
Reason, to reduce data transfer rate.
In the present embodiment, main control module 11 may include dangerous material processing identification module (not shown), at dangerous material
Reason identification module is used to receive the detection data of the transmission of dangerous material detecting module 12, and detection data input target dangerous material are visited
It surveys in model, obtains detection result, detection result is further sent to display module 13 and is shown.
Wherein, which can be trained neural network by sample echo reflection data
It arrives, sample echo reflection data include the echo reflection data of different polarization directions.The training of the target dangerous material detection model
Process can be with are as follows: using sample echo data as the input of neural network, manually determining detection result is as neural network
Output, is trained neural network, available target dangerous material detection model.Specifically, being carried out to sample echo data
The available corresponding characteristic of FFT transform；The corresponding dangerous material of each sample echo data are extracted by clustering algorithm
Fingerprint characteristic spectrum, forms dangerous material fingerprint characteristic spectrogram library；The corresponding relationship of training features described above data and fingerprint characteristic spectrum
Neural network obtains target dangerous material detection model.
Further, dangerous material processing identification module can also configure the running parameter of dangerous material detecting module 12,
Middle running parameter may include pulse width, pulse period, intermediate-frequency gain multiple and data extraction yield etc..Signal control module
After 125 receive running parameter configuration order, which can be parsed, repacking will order
It is handed down to the module configured in dangerous material detecting module 12 with specified format, realizes the configuration of running parameter.
Dangerous material processing identification module can also identify terahertz signal on the graphic interface in display module 13
Coverage area, and the echo ranging parameter of target reflection is received, to adjust the covering of terahertz signal according to target distance parameter
Range.Dangerous material processing identification module can also receive the target characteristic data of terahertz signal and show in display module 13
Show, when being more than given threshold, early warning mark can be carried out on the graphic interface in display module 13.
Further, main control module 11 further includes image module and clock distribution module (not shown), image module
For receiving image, clock distribution module is used to provide required clock for all modules of detection device 10.Wherein image mould
Block is specifically used for receiving the image and real-time display of image acquisition device acquisition, can also adjust the display effect of image, such as
Contrast and colorimetric parameter of image etc..
Further, display module 11 can also be disposed beyond the clouds, the detection result that main control module 11 can be sent into
Row display and early warning, and can be with binding key Personnel Resources library, realtime qualification and early warning, and link with police service terminal.
Technical solution provided in this embodiment, the main control module in detection device send probe instructions to dangerous material and detect mould
Block, dangerous material detecting module are based on the received four tunnels terahertz wave signal of frequency multiplication link module and carry out dangerous material spy to target object
It surveys, and detection data is back to main control module, main control module shows in display module according to the detection data received and detects
As a result.Frequency multiplication link module in the embodiment of the present invention receives frequency multiplication link modules using double hairs are double, compared to the prior art in
Frequency multiplication link module provides the terahertz signal of more polarization directions, improves the intensity and model of the terahertz signal of transmitting
Coverage is enclosed, and then improves the automatic recall rate of the detection of open area human body hidden dangerous goods unaware and early warning and accurate
Rate.
Embodiment two
Fig. 3 is the structural schematic diagram of rays safety detection apparatus provided by Embodiment 2 of the present invention.Fig. 3, which is shown, to be suitable for being used to realizing this
The block diagram of the exemplary rays safety detection apparatus of invention embodiment.The rays safety detection apparatus that Fig. 3 is shown is only an example, should not be to this hair
The function and use scope of bright embodiment bring any restrictions.
The rays safety detection apparatus is at least one of intelligent safety check robot, intelligent safety check cruiser and intelligent safety check instrument.Such as Fig. 3
Shown, which may include safety check control module 21, laser radar module 22, interactive module 23 and such as above-mentioned implementation
Detection device 10 in example, safety check control module 21 connect with laser radar module 22, interactive module 23, detection device 10 respectively
It connects.
Wherein laser radar module 22 is navigated for realizing autonomous positioning and avoidance, may include in laser radar module 22
Autonomous positioning navigation module constructs high-precision map, realizes autonomous positioning, and intelligent planning is most for scanning ambient enviroment
Good travelling route realizes intelligent barrier avoiding and intelligent patrol, it is particularly possible to the point of interest of user management independently gone on patrol, and
It wires back automatically when low battery, without artificial on duty.
Interactive module 23 may include video interactive module, face recognition module and voice interaction module, video calling mould
The video calling with long-range customer service or other relevant staff may be implemented in block, realizes more equipment interconnections, voice interaction module
It can be realized and user or other staff by technologies such as speech recognition technology, speech synthesis technique and speech understanding technologies
Interactive voice, realize interlinked command, face recognition module can precisely identify user by face recognition technology, and pass through language
Sound interactive module and user greet, and promote user experience effect.
Open area people may be implemented by the detection device configured in above-described embodiment in rays safety detection apparatus in the present embodiment
The detection of body hidden dangerous goods unaware and early warning, and may be implemented independently to go on patrol the interaction with various ways, further promoted
The efficiency of safety check and the experience effect of user.
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 device, which is characterized in that including main control module, dangerous material detecting module and display module；Wherein,
The main control module is connect with the dangerous material detecting module, the display module, for sending probe instructions to described
Dangerous material detecting module, and receive the detection data of the dangerous material detecting module return and according to the detection data in institute
It states display module and shows detection result；
The dangerous material detecting module includes frequency modulation source module, frequency multiplication link module and signal acquisition module, the frequency multiplication link
One end of module is connect with the frequency modulation source module, and the other end of the frequency multiplication link module and the signal acquisition module connect
It connects；
Emit extremely after the two-way terahertz wave signal frequency multiplication that the frequency multiplication link module is used to send the frequency modulation source module
Target object, and the other two-way terahertz wave signal that the reflection echo signal of return and the frequency modulation source module are sent is carried out
Output signal is obtained after mixing, the output signal is further transmitted to the signal acquisition module.
2. detection device according to claim 1, which is characterized in that the frequency multiplication link module includes two-way transmitting frequency multiplication
Link and two-way receive frequency multiplication link.
3. detection device according to claim 2, which is characterized in that the two-way terahertz wave signal includes the first route
Property FM signal and the second linear FM signal；
The transmitting frequency multiplication link includes power amplifier and transmitting antenna, first sent for receiving the frequency modulation source module
Linear FM signal or the second linear FM signal, and by the first via linear FM signal or described second linear
FM signal is launched after being amplified by the power amplifier by the transmitting antenna.
4. detection device according to claim 2, which is characterized in that the other two-way terahertz wave signal includes third
Linear FM signal and the 4th linear FM signal；
The reception frequency multiplication link includes receiving antenna and harmonic mixer, the third sent for receiving the frequency modulation source module
Linear FM signal or the 4th linear FM signal and pass through the receiving antenna receive first via reflection echo signal
Or the second road reflection echo signal, and by the harmonic mixer by the linear FM signal of the third and the first via
Reflection echo signal or the 4th linear FM signal and second road reflection echo signal pass through the harmonic mixing
Device is mixed, by after mixing the first output signal or the second output signal be sent to the signal acquisition module.
5. detection device according to claim 4, which is characterized in that the dangerous material detecting module further includes signal amplification
One end of filter module, the signal amplification filter module is connect with the signal acquisition module, the signal amplification filtering mould
The other end of block is connect with the harmonic mixer in the reception frequency multiplication link module；
The signal amplification filter module is used to filter first output signal received or second output signal
It obtains the detection data after amplification, and by analog-to-digital conversion and is sent to the signal acquisition module.
6. detection device according to claim 1, which is characterized in that the dangerous material detecting module further includes signal control
One end of module, the signal control module is connected to the main control module, the other end of the signal control module with it is described
The connection of frequency modulation source module；
The signal control module is used to receive the probe instructions and running parameter that the main control module is sent, and receives the letter
The detection data that number acquisition module is sent carries out the detection data to be transmitted to the master control mould after Digital Signal Processing
Block.
7. detection device according to claim 1, which is characterized in that the main control module includes dangerous material processing identification mould
Block, dangerous material processing identification module are used to receive the detection data that the dangerous material detecting module is sent, and by the spy
Measured data inputs in target dangerous material detection model, obtains detection result, is further sent to the detection result described aobvious
Show that module is shown.
8. detection device according to claim 7, which is characterized in that the target dangerous material detection model is returned by sample
Wave reflection data are trained to obtain to neural network, and the sample echo reflection data include that the echo of different polarization directions is anti-
Penetrate data.
9. a kind of rays safety detection apparatus, which is characterized in that including safety check control module, laser radar module, interactive module and such as power
Benefit requires any detection device in 1-8, the safety check control module respectively with the laser radar module, the interaction
Module, detection device connection.
10. rays safety detection apparatus according to claim 9, which is characterized in that the rays safety detection apparatus is at least intelligent safety check machine
One of people, intelligent safety check cruiser and intelligent safety check instrument.
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