CN107358776A - Heartbeat detection radar system - Google Patents
Heartbeat detection radar system Download PDFInfo
- Publication number
- CN107358776A CN107358776A CN201710730053.2A CN201710730053A CN107358776A CN 107358776 A CN107358776 A CN 107358776A CN 201710730053 A CN201710730053 A CN 201710730053A CN 107358776 A CN107358776 A CN 107358776A
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- Prior art keywords
- signal
- radar system
- frequency mixer
- input
- frequency
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
-
- 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
- G01S7/28—Details of pulse systems
- G01S7/282—Transmitters
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar Systems Or Details Thereof (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The present invention relates to a kind of heartbeat detection radar system, radar system includes：Radar transmitter, for launching the signal of predetermined waveform；The transmitting antenna being connected with radar transmitter, the signal for radar transmitter to be launched are radiated to default security region；Reception antenna, the echo-signal of human heartbeat's signal is included for receiving；The signal to noise ratio regulation circuit being connected with reception antenna, for improving the signal to noise ratio of low frequency signal in echo-signal；The frequency mixer being connected with signal to noise ratio regulation circuit, for the echo-signal of signal to noise ratio regulation circuit input to be carried out into Frequency mixing processing with default input signal；The A/D converter being connected with frequency mixer, the mixed frequency signal for frequency mixer to be inputted are converted to data signal；The terminal processor being connected with A/D converter, for detecting the heartbeat signal included in data signal.The present invention determines whether invader by detecting the heartbeat signal of human body, can strengthen security safety.
Description
Technical field
The present invention relates to safety-security area, more particularly to a kind of heartbeat detection radar system.
Background technology
Two kinds of monitor modes of security system generally use camera and infrared ray sensor at present.During using camera, enter
The person of invading can block camera, or the transmission line that invader is destroyed between camera and exchange, shooting using external object
Head will lose security function.Infrared ray sensor can not be by all standing of security region, and invader can utilize infrared ray gap, suitable
Profit is hidden, then security system will lose corresponding function.
Therefore, for current security system the defects of, is, it is necessary to a kind of more structurally sound security system.
The content of the invention
Based on this, it is necessary to a kind of problem the defects of for current security system, there is provided heartbeat detection radar system.
A kind of heartbeat detection radar system, the radar system include：
Radar transmitter, for launching the signal of predetermined waveform；
The transmitting antenna being connected with the radar transmitter, the signal for the radar transmitter to be launched are radiated to pre-
If security region；
Reception antenna, the echo-signal of human heartbeat's signal is included for receiving；
The signal to noise ratio regulation circuit being connected with the reception antenna, for improving the letter of low frequency signal in the echo-signal
Make an uproar ratio；
The frequency mixer being connected with signal to noise ratio regulation circuit, for the echo of signal to noise ratio regulation circuit input to be believed
Number with default input signal carry out Frequency mixing processing；
The A/D converter being connected with the frequency mixer, the mixed frequency signal for the frequency mixer to be inputted are converted to numeral
Signal；
The terminal processor being connected with the A/D converter, for detecting the heartbeat signal included in the data signal.
Further, the radar system also includes：
The alarm module being connected with the terminal handler, for being sent out when the terminal processor detects heartbeat signal
Go out alarm signal.
Further, the alarm module is buzzer.
Further, the radar system also includes：
The flashing lamp being connected with the terminal handler, for being flashed when the terminal processor detects heartbeat signal
Alarm.
Further, the radar system also includes：
The two-way power splitter being connected with signal to noise ratio regulation circuit and frequency mixer, for the signal to noise ratio to be adjusted into circuit
The echo-signal of input is divided into two-way.
Further, the two-way output end of the two-way power splitter is all connected with the input of frequency mixer.
Further, the radar system also includes the IQ quadrature demodulators being connected with the A/D converter；
The input of one of them frequency mixer is also connected with hybrid coupler, output end connection low-noise amplifier, institute
State the I passages of low-noise amplifier connection IQ quadrature demodulators；
The input of another frequency mixer is also associated with phase shifter, and output end connection low-noise amplifier is described low
Noise amplifier connects the Q passages of IQ quadrature demodulators.
Further, the radar transmitter includes：
Function generator, for producing the signal of predetermined waveform；
The pulse generator being connected with the function generator, the signal for being inputted according to the function generator produce
Default pulse signal；
Power divider, one of output end of the power divider connect the hybrid coupler, for will be defeated
The local oscillation signal entered is divided into two-way；
Second frequency mixer, another of one of input connection power divider of second frequency mixer are defeated
Go out end, another input of second frequency mixer connects the pulse generator, for input the power divider
Signal and the signal of pulse generator input are mixed；
The power amplifier being connected with second frequency mixer and transmitting antenna, for input second frequency mixer
Signal carries out power amplification and exported to the transmitting antenna.
In heartbeat detection radar system described above, radar transmitter can launch the signal of predetermined waveform, the signal pair
Human body is more sensitive, and the heartbeat that the echo-signal that the signal that transmitting antenna radiates is returned via Human feed back can include human body is believed
Number, the signal to noise ratio for improving low frequency signal in the echo-signal is mixed afterwards, is then converted into data signal, end
Reason machine can identify heartbeat signal therein, so as to judge whether that someone invades, so as to ensure safety.
Brief description of the drawings
Fig. 1 is the circuit diagram of the present embodiment heartbeat detection radar system.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, a kind of heartbeat detection radar system is present embodiments provided, wherein, radar system includes：
Radar transmitter, for launching the signal of predetermined waveform；
The transmitting antenna 110 being connected with radar transmitter, the signal for radar transmitter to be launched are radiated to default
Security region；
Reception antenna 120, the echo-signal of human heartbeat's signal is included for receiving；
The signal to noise ratio regulation circuit 130 being connected with reception antenna 120, for improving the noise of low frequency signal in echo-signal
Than；
The frequency mixer 140 being connected with signal to noise ratio regulation circuit 130, for the echo for inputting signal to noise ratio regulation circuit 130
Signal carries out Frequency mixing processing with default input signal；
The A/D converter being connected with frequency mixer, the mixed frequency signal for frequency mixer to be inputted are converted to data signal；
The terminal processor being connected with A/D converter, for detecting the heartbeat signal included in data signal.
In heartbeat detection radar system described above, radar transmitter can launch the signal of predetermined waveform, the signal pair
Human body is more sensitive, and the heartbeat that the echo-signal that the signal that transmitting antenna radiates is returned via Human feed back can include human body is believed
Number, the signal to noise ratio for improving low frequency signal in the echo-signal is mixed afterwards, is then converted into data signal, end
Reason machine can identify heartbeat signal therein, so as to judge whether that someone invades, so as to ensure safety.
Wherein, radar system also includes：
The two-way power splitter 150 being connected with signal to noise ratio regulation circuit 130 and frequency mixer 140, for signal to noise ratio to be adjusted into electricity
The echo-signal that road 130 inputs is divided into two-way.The two-way output end of two-way power splitter 150 is all connected with the input of frequency mixer 140.
As shown in figure 1, frequency mixer 140 has two.Radar system also includes the IQ quadrature demodulations being connected with A/D converter
Device；
The input of one of frequency mixer 140 is also connected with hybrid coupler 160, output end connection low-noise amplifier
170, low-noise amplifier 170 connects the I passages of IQ quadrature demodulators；
The input of another frequency mixer 140 is also associated with phase shifter 180, and output end connection low-noise amplifier 170 is low
Noise amplifier 170 connects the Q passages of IQ quadrature demodulators.
Radar transmitter includes：
Function generator 190, for producing the signal of predetermined waveform；
The pulse generator 191 that and function generator 190 connects, for the signal production inputted according to function generator 190
Raw default pulse signal；
Power divider 192, one of output end connection hybrid coupler 160 of power divider 192, for will be defeated
The local oscillation signal entered is divided into two-way；
Second frequency mixer 193, the second frequency mixer 193 one of input connection power divider 192 another
Output end, another input connection pulse generator 191 of the second frequency mixer 193, for the letter for inputting power divider 192
Number and pulse generator 191 input signal be mixed；
The power amplifier 194 being connected with the second frequency mixer 193 and transmitting antenna 110, for the second frequency mixer 193 is defeated
The signal entered carries out power amplification and exported to transmitting antenna 110.
Wherein, hybrid coupler is 90 degree of hybrid couplers.
General detection radar, which can not monitor, creeps or invader that prone position is creeped, so invader can utilize
The shortcomings that ordinary radar, hide the monitoring of ordinary radar, also failed so as to the function of surveillance radar.The radar system of the present embodiment
The electromagnetic wave signal of certain frequency can be launched, the electromagnetic wave signal of the frequency is to be directed to the palmic rate of human body and set.
When, once there is the invasion of life entity, the echo-signal reflected will include human heartbeat's signal, receive in monitored area
Antenna will be triggered to terminal processor or security system, so as to monitor security region whether there is life entity invasion.
The palmic rate of average person is between 0.8~2.5Hz, in respiratory at a slow speed, the heartbeat of human body is frequently
Rate will be lower, probably be between 0.2~0.5Hz.The so low frequency signal of detection, the radar system of the present embodiment then utilize
The micro-Doppler feature of human heartbeat.Micro-Doppler effect in radar observation refer to target or target part vibration or
Modulation can be produced to the frequency spectrum of radar echo signal by rotating.The heartbeat detection radar of regional area security is exactly to utilize human heartbeat
Vibration produce micro-Doppler effect phenomenon, and detect whether the region has life entity invasion.Micro- Doppler is fine motion target
The instantaneous frequency of echo-signal corresponding to non-uniform movement component, the instantaneous frequency of the signal of fine motion target echo is time-varying,
Namely micro- Doppler is also the frequency of time-varying, so can not be gone to handle echo-signal with common Fourier transformation, because general
Logical Fourier transformation is only able to detect the frequency of micro-doppler, and can not detect that frequency changes with time.The present embodiment
Consideration goes to detect the frequency of micro- Doppler using wavelet transformation or Hough transformation, because this two kinds become scaling method and can examine simultaneously
Echo-signal frequency is measured to change over time.
As shown in figure 1, function generator can send a string of subnanosecond level trains of pulse with 10MHz speed, and feed back to
Pulse generator.The signal that local oscillation signal exports after power divider is 10GHz, after the second frequency mixer is mixed, is passed through
Power amplifier is exported to transmitting antenna, transmitting antenna and set, and electromagnetic wave signal can be radiated to default monitoring
Region, realize monitoring.
After the echo-signal that reception antenna 120 receives is amplified low frequency signal therein by signal to noise ratio regulation circuit 130,
Exported by two-way power splitter 150 to two frequency mixers 140.The signal that one of frequency mixer 140 inputs two-way power splitter 150
After the signal inputted with 90 degree of hybrid couplers 160 mixes, by the I passages of IQ quadrature demodulators after power amplifier LNA170
Output；Another frequency mixer 140 mixes the phase adjustment signal that the signal that two-way power splitter 150 inputs inputs with phase shifter 180
After frequency, exported after power amplifier LNA170 by the Q passages of IQ quadrature demodulators.A/D converter is defeated by IQ quadrature demodulators
The signal entered is converted to data signal, and terminal processor is handled the data signal, extracts the heartbeat letter wherein included
Number.Wherein, terminal processor, which carries out processing to data signal, includes Wave beam forming, pulse compression, clutter filtering and Doppler
The processes such as processing, when terminal processor detects echo signal (heartbeat signal), then buzzer is controlled to send alarm, same to time control
Flashing lamp flicker processed.
The radar system that the present embodiment provides is for detecting life space position and life in some known determination region
A kind of instrument of information, its application places can include the higher ranked regions of security such as bank, national treasury, to determine whether to give birth to
Life body is intruded into the region specified.The core of the radar system of the present embodiment is the frequency based on human life heartbeat, transmitting
The electromagnetic wave signal of specific frequency, if detect target object, the echo-signal of return passes through data processing, detects and includes
The frequency of the echo-signal of life entity heartbeat signal.
The radar system of the present embodiment also includes the alarm module being connected with terminal handler, in terminal processes machine examination
Alarm signal is sent when measuring heartbeat signal.Alarm module is buzzer.
Radar system also includes：
The flashing lamp being connected with terminal handler, for flashing alarm when terminal processor detects heartbeat signal.
When radar system discovery has invasion, buzzer is then alarmed, meanwhile, flashing lamp flicker, remind Security Personnel to have
Invader, so as to improve security safety.
The radar system of the present embodiment is more sensitive for human testing, is not easy to be influenceed by extraneous factor, and working life is longer,
It is and simpler using operating.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of heartbeat detection radar system, it is characterised in that the radar system includes：
Radar transmitter, for launching the signal of predetermined waveform；
The transmitting antenna being connected with the radar transmitter, the signal for the radar transmitter to be launched are radiated to default
Security region；
Reception antenna, the echo-signal of human heartbeat's signal is included for receiving；
The signal to noise ratio regulation circuit being connected with the reception antenna, for improving the noise of low frequency signal in the echo-signal
Than；
With the frequency mixer that be connected of signal to noise ratio regulation circuit, for by the echo-signal of signal to noise ratio regulation circuit input and
Default input signal carries out Frequency mixing processing；
The A/D converter being connected with the frequency mixer, the mixed frequency signal for the frequency mixer to be inputted are converted to data signal；
The terminal processor being connected with the A/D converter, for detecting the heartbeat signal included in the data signal.
2. radar system according to claim 1, it is characterised in that the radar system also includes：
The alarm module being connected with the terminal handler, for sending report when the terminal processor detects heartbeat signal
Alert signal.
3. radar system according to claim 2, it is characterised in that the alarm module is buzzer.
4. radar system according to claim 2, it is characterised in that the radar system also includes：
The flashing lamp being connected with the terminal handler, for flashing report when the terminal processor detects heartbeat signal
It is alert.
5. radar system according to claim 1, it is characterised in that the radar system also includes：
The two-way power splitter being connected with signal to noise ratio regulation circuit and frequency mixer, for signal to noise ratio regulation circuit to be inputted
Echo-signal be divided into two-way.
6. radar system according to claim 5, it is characterised in that the two-way output end of the two-way power splitter is all connected with
The input of frequency mixer.
7. radar system according to claim 6, it is characterised in that the radar system also includes changing with the A/D
The IQ quadrature demodulators of device connection；
The input of one of them frequency mixer is also connected with hybrid coupler, and output end connection low-noise amplifier is described low
Noise amplifier connects the I passages of IQ quadrature demodulators；
The input of another frequency mixer is also associated with phase shifter, output end connection low-noise amplifier, the low noise
Amplifier connects the Q passages of IQ quadrature demodulators.
8. radar system according to claim 7, it is characterised in that the radar transmitter includes：
Function generator, for producing the signal of predetermined waveform；
The pulse generator being connected with the function generator, the signal for being inputted according to the function generator produce default
Pulse signal；
Power divider, one of output end of the power divider connect the hybrid coupler, for by input
Local oscillation signal is divided into two-way；
Second frequency mixer, one of input of second frequency mixer connect another output of the power divider
End, another input of second frequency mixer connects the pulse generator, for the letter for inputting the power divider
Number and the pulse generator input signal be mixed；
The power amplifier being connected with second frequency mixer and transmitting antenna, for the signal for inputting second frequency mixer
Carry out power amplification and export to the transmitting antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730053.2A CN107358776A (en) | 2017-08-23 | 2017-08-23 | Heartbeat detection radar system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730053.2A CN107358776A (en) | 2017-08-23 | 2017-08-23 | Heartbeat detection radar system |
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| CN107358776A true CN107358776A (en) | 2017-11-17 |
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| CN201710730053.2A Pending CN107358776A (en) | 2017-08-23 | 2017-08-23 | Heartbeat detection radar system |
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Cited By (6)
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| CN108845310A (en) * | 2018-04-30 | 2018-11-20 | 河南师范大学 | A kind of novel biological response device |
| CN109188371A (en) * | 2018-09-19 | 2019-01-11 | 天津大学 | A kind of double frequency double reception antenna circuit structure of achievable indoor life detection |
| CN109239708A (en) * | 2018-09-19 | 2019-01-18 | 天津大学 | A kind of double frequency circuit structure for realizing vital signs detecting and short distance positioning |
| CN109883535A (en) * | 2019-01-25 | 2019-06-14 | 陕煤集团神木张家峁矿业有限公司 | A kind of vibration measurement device and method based on millimeter wave |
| CN112526501A (en) * | 2019-09-19 | 2021-03-19 | 苏州豪米波技术有限公司 | Radar system for detecting life breath |
| CN113288080A (en) * | 2021-04-28 | 2021-08-24 | 郑州大学 | Non-contact vital sign detection system based on phase comparison |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108845310A (en) * | 2018-04-30 | 2018-11-20 | 河南师范大学 | A kind of novel biological response device |
| CN109188371A (en) * | 2018-09-19 | 2019-01-11 | 天津大学 | A kind of double frequency double reception antenna circuit structure of achievable indoor life detection |
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| CN109883535A (en) * | 2019-01-25 | 2019-06-14 | 陕煤集团神木张家峁矿业有限公司 | A kind of vibration measurement device and method based on millimeter wave |
| CN112526501A (en) * | 2019-09-19 | 2021-03-19 | 苏州豪米波技术有限公司 | Radar system for detecting life breath |
| CN113288080A (en) * | 2021-04-28 | 2021-08-24 | 郑州大学 | Non-contact vital sign detection system based on phase comparison |
| CN113288080B (en) * | 2021-04-28 | 2022-04-08 | 郑州大学 | A non-contact vital sign detection system based on phase comparison |
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