CN110333541A - A kind of life body detecting method, equipment and automobile data recorder - Google Patents
A kind of life body detecting method, equipment and automobile data recorder Download PDFInfo
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- CN110333541A CN110333541A CN201910617282.2A CN201910617282A CN110333541A CN 110333541 A CN110333541 A CN 110333541A CN 201910617282 A CN201910617282 A CN 201910617282A CN 110333541 A CN110333541 A CN 110333541A
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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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
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
- G07C5/0866—Registering performance data using electronic data carriers the electronic data carrier being a digital video recorder in combination with video camera
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention provides a kind of life body detecting method, equipment and automobile data recorders, method is applied to life entity detection device, life entity detection device includes at least two signal projectors and the signal receiver that is correspondingly arranged with each signal projector, and the union of all subregion of the signal covering of each signal projector transmitting covers area to be tested；Method includes generating detection wave signal and modulating, and obtains at least two modulation detection wave signals；Modulation detection wave signal is emitted；Reflection wave signal corresponding with each modulation detection wave signal is received, and each reflection wave signal is decoded and is demodulated, obtains echo signal；It detects whether comprising vital sign parameter signals in each echo signal, when there are when vital sign parameter signals, determine that there are life entities in device region to be detected at least one echo signal.The synchronous detection to area to be tested whole coverage area may be implemented by the above method, avoid the appearance of missing inspection.
Description
Technical field
The present invention relates to life entity detection technique fields, and in particular to a kind of life body detecting method, equipment and driving note
Record instrument.
Background technique
Recent years, children leave accident interior, because finding to lead to death of child not in time frequent occurrence.Due to car
Environment closing, atmosphere draught-free can especially reach 60 DEG C or more within summer, vehicle interior temperature short time, be easy to interior youngster
Virgin safety threatens.Meanwhile even if vehicle interior temperature is not high, over time, in-car air quality can be gradually reduced,
Oxygen content deficiency is eventually resulted in, children can also be made to there is the danger of asphyxia.
Current life entity detection technique includes infra-red detection, motion sensor, ultrasonic listening etc..Infra-red detection
Technology is affected by temperature larger, and vehicle interior temperature is raised to and is easy to error detection to a certain degree, and motion sensor technology is easy by side
Environmental disturbances.Therefore more commonly used for ultrasonic listening, but when using ultrasonic listening, can there are problems that missing inspection.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of life body detecting method, equipment and automobile data recorder, to solve
Emit the missing inspection problem occurred when radio-wave sounding and ultrasonic listening using radio frequency sending set.
According in a first aspect, being set the embodiment of the invention provides a kind of life body detecting method applied to life entity detection
Standby, the life entity detection device includes that at least two signal projectors and the signal being correspondingly arranged with each signal projector receive
The distribution in the life entity detection device of device, each signal projector meets: the signal covering of each signal projector transmitting
All subregion union cover area to be tested；The described method includes:
Detection wave signal is generated, the detection wave signal is modulated, at least two modulation detection wave signals are obtained；
The signal projector emits the modulation detection wave signal；
The signal receiver receives reflection wave signal corresponding with each modulation detection wave signal；
Reflection wave signal is decoded and is demodulated respectively, obtains echo signal；It detects in each echo signal and whether wraps
Containing vital sign parameter signals, when, there are when vital sign parameter signals, determining in the device region to be detected at least one echo signal
There are life entities.
The detection wave signal of generation is modulated, obtains at least by life body detecting method provided in an embodiment of the present invention
Two modulation detection wave signals, and by the different signal projector in setting position by each modulation detection wave signal emit to
The subregion of detector region；Wherein the distribution in the life entity detection device of each signal projector meets: each signal
The union of all subregion of the signal covering of transmitter transmitting covers area to be tested；It receives opposite with each modulation detection wave signal
The reflection wave signal answered is decoded and demodulates to each reflection wave signal respectively, obtains echo signal, when at least one target
It, can be real by the above method there are when vital sign parameter signals, determining that there are life entities in the device region to be detected in signal
Now the synchronous of area to be tested whole coverage area is detected, avoids the appearance of missing inspection, technical solution of the present invention has inspection
It is high to survey accuracy rate, the advantages such as coverage area is big, and omission factor is low.
With reference to first aspect, in first aspect first embodiment, the detection wave signal is modulated, obtain to
Two modulation detection wave signals include: less
The detection wave signal is modulated using at least two address codes, obtains at least two modulation detection waves letter
Number, wherein the address code is corresponding with the modulation detection wave signal.
First embodiment with reference to first aspect solves reflection wave signal in first aspect second embodiment
Code include:
Reflection wave signal is decoded using reference address code, wherein the reference address code is corresponding with address code,
And the address code is the address code being modulated to modulation detection wave signal corresponding with the reflection wave signal.
Second embodiment with reference to first aspect, in first aspect third embodiment, it is described to reflection wave signal into
Row demodulation, obtaining echo signal includes:
Modulation detection wave signal corresponding with the reflection wave signal is multiplied with described decoded reflection wave signal,
Obtain product signal；
Low-pass filtering is carried out to the product signal, obtains echo signal.
With reference to first aspect, whether in the 4th embodiment of first aspect, detecting in echo signal includes vital sign
Signal includes:
Power spectrumanalysis is carried out to the echo signal, to obtain the energy of reflection wave signal；When the energy is less than first
When threshold value, determine in the echo signal comprising vital sign parameter signals；
And/or demodulated by arc tangent and extract the frequency amount of changing with time in the echo signal, to obtain frequency letter
Number；Data processing is carried out to the frequency signal, to obtain vital sign parameter signals；
When the frequency of the vital sign parameter signals is greater than second threshold, determine in the echo signal comprising life entity reference
Number.
With reference to first aspect, first aspect first embodiment is to the 4th embodiment, in the 5th embodiment party of first aspect
In formula, life body detecting method is further comprising the steps of:
When there are vital sign parameter signals in two echo signals, by two echo signals/with two echo signal phases
Corresponding decoded reflection wave signal is related, calculates the time difference between identical signal, obtains life according to the time difference
Range difference of the body to two signal receivers；
Calculate the distance between two signal receivers corresponding with described two echo signals；
According to the distance between described two signal receivers, the range difference meter of the life entity to two signal receivers
The angle for calculating the life entity position and two signal receiver lines, obtains the orientation of the life entity.
According to second aspect, the embodiment of the invention provides a kind of life entity detection device, transmitted waveform generation module is compiled
Code device, signal projector, signal receiver, decoder and signal processing module, wherein the encoder and the signal emit
Device, the signal receiver, the quantity of the decoder are identical, and at least two, and the signal projector and the signal
Receiver is correspondingly arranged, and the encoder is correspondingly arranged with the decoder, and each signal projector is detected in the life entity
Distribution in equipment meets: the union of all subregion of the signal covering of each signal projector transmitting covers area to be tested；
The transmitted waveform generation module, for generating detection wave signal；
The encoder obtains modulation detection wave signal for being modulated to the detection wave signal；
The signal projector, for emitting modulation detection wave signal；
The signal receiver, for receiving reflection wave signal；
The decoder is respectively used to be decoded the reflection wave signal；
The signal processing module obtains echo signal for demodulating respectively to decoded reflection wave signal；Inspection
Whether survey in each echo signal comprising vital sign parameter signals, when at least one echo signal there are when vital sign parameter signals,
Determine that there are life entities in the device region to be detected.
In conjunction with second aspect, in second aspect first embodiment, each signal projector is detected in the life entity
Distribution in equipment meets: at least there are two the detection waves of signal projector transmitting for each subregion in the device region to be detected
Signal can cover.
In conjunction with second aspect first embodiment, in second aspect second embodiment, the signal processing module is also
For:
When there are vital sign parameter signals in two echo signals, by two echo signals/with two echo signal phases
Corresponding decoded reflection wave signal is related, calculates the time difference between identical signal, obtains life according to the time difference
Range difference of the body to two signal receivers；
Calculate the distance between two signal receivers corresponding with described two echo signals；
According to the distance between described two signal receivers, the range difference meter of the life entity to two signal receivers
The angle for calculating the life entity position and two signal receiver lines, obtains the orientation of the life entity.
According to the third aspect, the embodiment of the invention also provides a kind of automobile data recorders, including second aspect and second party
Life entity detection device provided by any one embodiment of face.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram of life body detecting method in the embodiment of the present invention 1；
Fig. 2 is the schematic diagram being modulated in the embodiment of the present invention 1 to detection wave signal；
Fig. 3 is the schematic diagram demodulated in the embodiment of the present invention 1 to reflection wave signal；
Fig. 4 is the flow diagram of life body detecting method in the embodiment of the present invention 2；
Fig. 5 is life entity orientation schematic diagram in the embodiment of the present invention 2；
Fig. 6 is the structural schematic diagram of a specific life entity detection device in the embodiment of the present invention 3；
Fig. 7 is the coverage area of every group of transceiving device in a specific life entity detection device in the embodiment of the present invention 3
Schematic diagram；
Fig. 8 is the flow diagram of the interior life entity based reminding method based on 4 automobile data recorder of the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance.
As previously mentioned, it is more commonly used at present to carry out life entity detection using ultrasonic listening technology, but there are missing inspections
The problem of, it learns by analysis, mainly since ultrasonic sensor field angle is small, particularly because of being detected existing for ultrasonic sensor
Caused by contradiction of the distance with detection angle, so that interior partial region can't detect, lead to missing inspection.
Embodiment 1
The embodiment of the present invention 1 provides a kind of life body detecting method, is applied to life entity detection device, the life entity
Detection device includes at least two signal projectors and the signal receiver that is correspondingly arranged with each signal projector, each signal transmitting
The distribution in the life entity detection device of device meets: all subregion of the signal covering of each signal projector transmitting and
Collection covering area to be tested.Exemplary, the area to be tested can be vehicle, or the partial region of vehicle.Fig. 1 is
The flow diagram of life body detecting method in the embodiment of the present invention 1, as shown in Figure 1, the process includes the following steps:
S101: generating detection wave signal, be modulated to the detection wave signal, obtains at least two modulation detection waves letter
Number.
Detection wave letter can be generated by Microcomputer control transmitted waveform generation module in the embodiment of the present invention 1
Number, the detection wave signal can be ultrasonic signal, be also possible to other kinds of detection wave signal.
As a specific embodiment, the detection wave signal is modulated, at least two modulation detections are obtained
Wave signal includes: to be modulated using at least two address codes to the detection wave signal, obtains at least two modulation detection waves
Signal, wherein the address code is corresponding with the modulation detection wave signal.It is exemplary, utilize 1 pair of detection wave signal of address code
It is modulated, obtains the first modulation detection wave signal；It is modulated using 2 pairs of detection wave signals of address code, obtains the second modulation
Detect wave signal.Code division multiplexing technology is a kind of multiplex mode for distinguishing each road original signal by different codings, and Fig. 2 is this
The schematic diagram that detection wave signal is modulated in inventive embodiments 1.Carrier wave in Fig. 2 is that transmitted waveform generation module generates
Detection wave signal, specifically, common address code includes m-sequence, walsh code in encoder.
S102: signal projector emits the modulation detection wave signal.
As a specific embodiment, it can use emission sensor and emit modulation detection wave signal to be detected
The subregion in device region.It is exemplary, the first modulation detection wave signal is emitted to device area to be detected using the first emission sensor
First subregion in domain is emitted the second modulation detection wave signal to the second of device region to be detected using the second emission sensor
Subregion.
S103: signal receiver receives reflection wave signal corresponding with each modulation detection wave signal.
Detection wave signal emits after touching life entity or other objects, can use receiving sensor reception
Reflection wave signal corresponding with each modulation detection wave signal.In embodiments of the present invention, signal receiver and signal projector
It is correspondingly arranged.It is exemplary, when having the first emission sensor and the second emission sensor, also has first be correspondingly arranged and receive
Sensor and the second receiving sensor.Wherein, each receiving sensor may receive all reflection signals.
S104: reflection wave signal is decoded and is demodulated respectively, obtains echo signal；Detecting in each echo signal is
No includes vital sign parameter signals, when there are when vital sign parameter signals, determining the device area to be detected at least one echo signal
There are life entities in domain.
As a specific embodiment, being decoded to reflection wave signal includes: using reference address code to reflection
Wave signal is decoded, wherein the reference address code is corresponding with address code, and the address code be to the reflection wave signal
The address code that corresponding modulation detection wave signal is modulated.It is exemplary, utilize 1 pair of first reflection wave signal of reference address code
It is decoded, wherein the first reflection wave signal is the received reflection wave signal of the first receiving sensor；Utilize reference address code 2
Second reflection wave signal is decoded, wherein the second reflection wave signal is the received reflection wave signal of the second receiving sensor.
Fig. 3 is the schematic diagram being decoded in the embodiment of the present invention 1 to reflection wave signal.In Fig. 3, it is received anti-for receiving signal
Penetrate signal.
It further include to decoded reflection after being decoded to reflection wave signal as a specific embodiment
Wave signal is amplified to be sampled with ADC.
As a specific embodiment, decoded reflection wave signal is demodulated, obtaining echo signal includes:
Modulation detection wave signal corresponding with the reflection wave signal is multiplied with described decoded reflection wave signal, obtains product
Signal；Low-pass filtering is carried out to the product signal, obtains echo signal.It is exemplary, by the first modulation detection wave signal and solution
The first reflection wave signal after code is multiplied, and obtains the first product signal, carries out low-pass filtering to the first product signal, obtains first
Echo signal；Second modulation detection wave signal is multiplied with decoded second reflection wave signal, obtains the second product signal, it is right
Second product signal carries out low-pass filtering, obtains the second echo signal.
Whether can be used comprising vital sign parameter signals as a specific embodiment, in detection echo signal following
One or two kinds of methods.Method 1: power spectrumanalysis is carried out to the echo signal, to obtain the energy of reflection wave signal；When described
When energy is less than first threshold, determine in the echo signal comprising vital sign parameter signals.Method 2: it is demodulated and is extracted by arc tangent
The frequency amount of changing with time in the echo signal, to obtain frequency signal；Data processing is carried out to the frequency signal, with
To vital sign parameter signals；When the frequency of the vital sign parameter signals is greater than second threshold, determine in the echo signal comprising life
Order sign.
The life body detecting method that the embodiment of the present invention 1 provides, the detection wave signal of generation is modulated, is obtained at least
Two modulation detection wave signals, and by the different signal projector in setting position by each modulation detection wave signal emit to
The subregion of detector region；Wherein the distribution in the life entity detection device of each signal projector meets: each signal
The union of all subregion of the signal covering of transmitter transmitting covers area to be tested；It receives opposite with each modulation detection wave signal
The reflection wave signal answered is decoded and demodulates to each reflection wave signal respectively, obtains echo signal, when at least one target
It, can be real by the above method there are when vital sign parameter signals, determining that there are life entities in the device region to be detected in signal
Now the synchronous of area to be tested whole coverage area is detected, avoids the appearance of missing inspection, technical solution of the present invention has inspection
It is high to survey accuracy rate, the advantages such as coverage area is big, and omission factor is low.
Embodiment 2
The embodiment of the present invention 2 provides a kind of life body detecting method, and Fig. 4 is life entity detection in the embodiment of the present invention 2
The flow diagram of method, as shown in figure 4, the step of step S401~S404 of the embodiment of the present invention 2 and the embodiment of the present invention 1
S101~S104 is identical, the difference lies in that further comprising the steps of after S404:
S405: when there are vital sign parameter signals in two echo signals, two echo signals/and two targets are believed
Number corresponding decoded reflection wave signal is related, calculates the time difference between identical signal, is obtained according to the time difference
Range difference of the life entity to two signal receivers.
Calculating the time difference between identical signal is the time difference calculated between two echo signals, or is calculated and two mesh
Mark the time difference between the corresponding decoded reflection wave signal of signal.
As a specific embodiment, when in two echo signals there are when same vital sign parameter signals, by two
Echo signal/decoded reflection wave signal corresponding to two echo signals is related, calculates the time between identical signal
Difference, according to the time difference obtain life entity to two signal receivers range difference.Exist in two echo signals with all one's life
Life sign is understood that may determine that it from same life entity according to the vital sign parameter signals in two echo signals.
S406: the distance between two signal receivers corresponding with described two echo signals are calculated.
S407: according to the distance between described two signal receivers, the life entity to two signal receivers away from
Deviation calculates the angle of the life entity position and two signal receiver lines, obtains the orientation of the life entity.
Fig. 5 is life entity orientation schematic diagram in the embodiment of the present invention 2.In Fig. 5, Δ r indicates life entity to two signals
The range difference of receiver, d indicate that the distance between two sensors, β indicate life entity position and two signal receivers
The angle of line, specifically, cos β=Δ r/d.
The life body detecting method that the embodiment of the present invention 2 provides not only may be implemented to area to be tested whole coverage area
Synchronous detection, avoid the appearance of missing inspection, but also can be according to two echo signals or corresponding with two echo signals
Decoded reflection wave signal and the distance between two signal receivers determine the orientation of life entity.
Embodiment 3
The embodiment of the present invention 3 provides a kind of life entity detection device, comprising: transmitted waveform generation module, encoder, letter
Number transmitter, signal receiver, decoder and signal processing module, wherein the encoder and the signal projector, described
Signal receiver, the quantity of the decoder are identical, and at least two, and the signal projector and the signal receiver pair
Should be arranged, the encoder is correspondingly arranged with the decoder, each signal projector in the life entity detection device
Distribution meets: the union of all subregion of the signal covering of each signal projector transmitting is the area to be tested；
The transmitted waveform generation module, for generating detection wave signal；
The encoder obtains modulation detection wave signal for being modulated to the detection wave signal；
The signal projector, for emitting modulation detection wave signal；
The signal receiver, for receiving reflection wave signal；
The decoder is respectively used to be decoded the reflection wave signal；
The signal processing module obtains echo signal for demodulating respectively to decoded reflection wave signal；Inspection
Whether survey in each echo signal comprising vital sign parameter signals, when at least one echo signal there are when vital sign parameter signals,
Determine that there are life entities in the device region to be detected.
In embodiments of the present invention, signal projector and signal receiver, which are correspondingly arranged, can be understood as same group of signal
Transmitter is identical as the setting angle of signal receiver.In the embodiment of the present invention 3, signal projector and signal receiver can be with
It is integrated (that is, the same device can not only emit modulation detection wave signal, but also the reflection wave signal being reflected back can be received),
It is also possible to be provided separately.
For the more detailed life entity detection device for illustrating the embodiment of the present invention 3, a specific life entity is provided
Detection device, Fig. 6 are the structural schematic diagram of a specific life entity detection device in the embodiment of the present invention 3, as shown in fig. 6,
The life entity detection device includes 1 transmitted waveform generation module, 4 encoders, 4 signal projectors, 4 signals receptions
Device, 4 decoders and 1 signal processing module, specifically, signal projector uses emission sensor, signal receiver is used
Receiving sensor；It in addition to this, further include 4 power amplifiers and 4 ADC module.
The workflow of the specific life entity detection device of the embodiment of the present invention 3 is as follows: Microcomputer control hair
It penetrates waveform generation module and generates simple signal, encoder carries out carrying out band spectrum modulation to simple signal according to every road address code, then
Signal is emitted to area to be tested by sensor respectively.That is, encoder 1 carries out simple signal according to address code 1
Band spectrum modulation obtains the first modulation detection wave, then emits the first modulation detection wave to area to be tested by emission sensor 1, compiles
Code device 2 carries out band spectrum modulation to simple signal according to address code 2 and obtains the second modulation detection wave, then by emission sensor 2 to
Area to be tested emits the second modulation detection wave, and so on.
Modulation detection wave can carry human body sign information after human body reflects.Four receiving sensors receive reflection signal
Afterwards, decoder is set separately according to four modulation detection waves to be demodulated.That is, receiving sensor 1 receives reflection signal
Input decoder 1 afterwards, decoder 1 are decoded using 1 pair of reflection wave signal of reference address code, wherein address code 1 and reference ground
Location code 1 is corresponding；Receiving sensor 2 receives input decoder 2 after reflection signal, and decoder 2 utilizes 2 pairs of reference address code reflections
Wave signal is decoded, and wherein address code 2 is corresponding with reference address code 2, and so on.
To amplifying after reflection wave signal decoding to signal, ADC sampling then is carried out to amplified signal, after sampling
Digital signal is input to signal processing module.
In signal processing module, the digital signal after sampling is demodulated respectively, obtains echo signal；Detection is each
It whether include vital sign parameter signals in echo signal, when there are when vital sign parameter signals, determining institute at least one echo signal
State in device region to be detected that there are life entities.
Specifically, demodulated to the digital signal after sampling, obtain echo signal include: by with the reflection wave signal phase
Corresponding modulation detection wave signal is multiplied with the digital signal after sampling, obtains product signal；The product signal is carried out low
Pass filter obtains echo signal.Specifically, whether including: to believe the target comprising vital sign parameter signals in detection echo signal
Number carry out power spectrumanalysis, to obtain the energy of reflection wave signal；When the energy is less than first threshold, determine that the target is believed
It include vital sign parameter signals in number；And/or demodulated by arc tangent and extract the frequency amount of changing with time in the echo signal,
To obtain frequency signal；Data processing is carried out to the frequency signal, to obtain vital sign parameter signals；When the life entity reference
Number frequency when being greater than second threshold, determine in the echo signal comprising vital sign parameter signals.
Fig. 7 is the coverage area of every group of transceiving device in a specific life entity detection device in the embodiment of the present invention 3
Schematic diagram, every group of transceiving device includes a signal projector and a signal receiver, in a tool of the embodiment of the present invention 3
In the life entity detection device of body, signal projector and signal receiver are integrated setting, i.e. a transceiving device can both be sent out
It penetrates modulation detection wave also and can receive reflection signal.As shown in fig. 7, there are four types of different line styles, i.e. line segment and centre in Fig. 7
3 kinds of different line segments of discontinuity length, every kind of line style have two, and the angle of two identical line style compositions is that the sector of acute angle is one
The coverage area of group transceiving device.As shown in fig. 7, there is the sub-district that at least two groups of transceiving devices can cover in the car
Domain, when there are vital sign parameter signals in two echo signals, the signal processing module is also used to: two targets are believed
Number/decoded reflection wave signal corresponding to two echo signals is related, the time difference between identical signal is calculated, according to
The time difference obtains life entity to the range difference of two signal receivers；Calculate two corresponding with described two echo signals
The distance between signal receiver；It is connect according to the distance between described two signal receivers, the life entity to two signals
The range difference for receiving device calculates the angle of the life entity position and two signal receiver lines, obtains the life entity
Orientation.
The specific life entity detection device of one of the embodiment of the present invention 3 by adjusting each transceiving device position and
Using the method for multi-code subregion, the synchronous detection to area to be tested whole coverage area may be implemented, while in each region
It is at least able to detect that there are two transceiving device, but also can be according to two echo signals or corresponding with two echo signals
Decoded reflection wave signal and the distance between two signal receivers determine the orientation of life entity.
Embodiment 4
The embodiment of the present invention 4 provides automobile data recorder, including life entity detection device described in embodiment 3.Fig. 8 is base
In the flow diagram of the interior life entity based reminding method of 4 automobile data recorder of the embodiment of the present invention.As shown in figure 8, specifically including
Following steps:
S81 is formed in recorder when meeting preset condition, such as after vehicle stall and car door car window are closed five minutes
Life entity detection device detection vehicle in whether there is life entity.Referring specifically to embodiment 1, details are not described herein.
S82 starts to detect next time if life entity detection device detects nobody, if detected in five minutes
No one, then life entity detection device enters sleep pattern, and hereafter each hour carries out detection in five minutes, carries out six detections
Life entity detection device stops working (avoid consumption of stopping for a long time) completely afterwards.If detecting interior someone, S83 is gone to；
S83, environment inside car detection module and GPS module are started to work, and vehicle location GPS information and environmental data are acquired,
Such as vehicle interior temperature, C02 concentration and vehicle location GPS information.
S84 sends prompting message to default personnel, and provides environmental data and GPS information.The default personnel be and this
The personnel of vehicle binding, such as car owner.
Whether can car owner receives prompting message, according to environment inside car and location information, judge oneself come back, need to beat
It turns on the aircondition or falls vehicle window, and send corresponding control instruction to vehicle receiving module.
S85 judges whether to receive the control instruction that default personnel are fed back based on prompting message.
Processor can be after sending a period of time after prompting message to default personnel, judge whether to receive
The control instruction that default personnel are fed back based on prompting message, if receiving the control instruction that default personnel are fed back based on prompting message
When, execute S86；Otherwise, S88 is executed.
S86 reads the control instruction of default personnel, goes to S87.
S87 executes corresponding movement based on control instruction control vehicle part.
For example, control instruction judges whether that being on engine opens air-conditioning, whether falls vehicle window, examines based on the received
Survey whether module stops working.
S88 judges whether environmental data is more than preset value.
Processor judges to detect after being not received by the control instruction that default personnel are fed back based on prompting message
When environmental data is more than preset value, when environmental data exceeds preset value, S89 is executed；Otherwise, the environment in current vehicle is indicated
Discomfort will not be caused to life entity, then executes S83, continue the detection of environmental data in vehicle.
S89, sends alarm signal or control vehicle part executes deliberate action.
It is exemplary, control vehicle part execute deliberate action include to alarm platform alarm, car light flashing, horn blast,
And open interior air-conditioning system etc..
It is that can lead to it will be understood by those skilled in the art that realizing all or part of the process in above-described embodiment method
Computer program is crossed to instruct relevant hardware and complete, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can for magnetic disk,
CD, read-only memory (Read-Only Memory, ROM), random access memory (Random Access
Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk Drive, abbreviation: HDD) or solid state hard disk
(Solid-State Drive, SSD) etc.；The storage medium can also include the combination of the memory of mentioned kind.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where make various modifications and variations, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (10)
1. a kind of life body detecting method is applied to life entity detection device, which is characterized in that the life entity detection device packet
The signal receiver for including at least two signal projectors and being correspondingly arranged with each signal projector, each signal projector described
Distribution in life entity detection device meets: the union covering of all subregion of the signal covering of each signal projector transmitting is to be checked
Survey region；The described method includes:
Detection wave signal is generated, the detection wave signal is modulated, at least two modulation detection wave signals are obtained；
The signal projector emits the modulation detection wave signal；
The signal receiver receives reflection wave signal corresponding with each modulation detection wave signal；
Reflection wave signal is decoded and is demodulated respectively, obtains echo signal；It whether detects in each echo signal comprising life
Sign is ordered, when there are when vital sign parameter signals, determine to exist in the device region to be detected at least one echo signal
Life entity.
2. life body detecting method according to claim 1, which is characterized in that the detection wave signal is modulated,
Obtaining at least two modulation detection wave signals includes:
The detection wave signal is modulated using at least two address codes, obtains at least two modulation detection wave signals,
Described in address code it is corresponding with the modulation detection wave signal.
3. life body detecting method according to claim 2, which is characterized in that be decoded to reflection wave signal and include:
Reflection wave signal is decoded using reference address code, wherein the reference address code is corresponding with address code, and should
Address code is the address code being modulated to modulation detection wave signal corresponding with the reflection wave signal.
4. life body detecting method according to claim 3, which is characterized in that it is described that reflection wave signal is demodulated,
Obtaining echo signal includes:
Modulation detection wave signal corresponding with the reflection wave signal is multiplied with described decoded reflection wave signal, is obtained
Product signal；
Low-pass filtering is carried out to the product signal, obtains echo signal.
5. life body detecting method according to claim 1, which is characterized in that whether include life in detection echo signal
Sign includes:
Power spectrumanalysis is carried out to the echo signal, to obtain the energy of reflection wave signal；When the energy is less than first threshold
When, it determines in the echo signal comprising vital sign parameter signals；
And/or demodulated by arc tangent and extract the frequency amount of changing with time in the echo signal, to obtain frequency signal；It is right
The frequency signal carries out data processing, to obtain vital sign parameter signals；
When the frequency of the vital sign parameter signals is greater than second threshold, determine in the echo signal comprising vital sign parameter signals.
6. life body detecting method according to claim 1-5, which is characterized in that further include:
When there are vital sign parameter signals in two echo signals, by two echo signals/corresponding with two echo signals
Decoded reflection wave signal it is related, calculate the time difference between identical signal, life entity obtained according to the time difference and is arrived
The range difference of two signal receivers；
Calculate the distance between two signal receivers corresponding with described two echo signals；
Institute is calculated according to the range difference of the distance between described two signal receivers, the life entity to two signal receivers
The angle for stating life entity position Yu two signal receiver lines obtains the orientation of the life entity.
7. a kind of life entity detection device characterized by comprising transmitted waveform generation module, encoder, signal projector,
Signal receiver, decoder and signal processing module, wherein the encoder and the signal projector, the signal receive
Device, the quantity of the decoder are identical, and at least two, and the signal projector is correspondingly arranged with the signal receiver,
The encoder is correspondingly arranged with the decoder, and the distribution in the life entity detection device of each signal projector is full
Foot: the union of all subregion of the signal covering of each signal projector transmitting covers area to be tested；
The transmitted waveform generation module, for generating detection wave signal；
The encoder obtains modulation detection wave signal for being modulated to the detection wave signal；
The signal projector, for emitting modulation detection wave signal；
The signal receiver, for receiving reflection wave signal；
The decoder is respectively used to be decoded the reflection wave signal；
The signal processing module obtains echo signal for demodulating respectively to decoded reflection wave signal；Detection is every
It whether include vital sign parameter signals in a echo signal, when there are when vital sign parameter signals, determining at least one echo signal
There are life entities in the device region to be detected.
8. life entity detection device according to claim 7, which is characterized in that each signal projector in the life entity
Distribution in detection device meets: at least there are two the inspections of signal projector transmitting for each subregion in the device region to be detected
Surveying wave signal can cover.
9. life entity detection device according to claim 8, which is characterized in that the signal processing module is also used to:
When there are vital sign parameter signals in two echo signals, by two echo signals/corresponding with two echo signals
Decoded reflection wave signal it is related, calculate the time difference between identical signal, life entity obtained according to the time difference and is arrived
The range difference of two signal receivers；
Calculate the distance between two signal receivers corresponding with described two echo signals；
Institute is calculated according to the range difference of the distance between described two signal receivers, the life entity to two signal receivers
The angle for stating life entity position Yu two signal receiver lines obtains the orientation of the life entity.
10. a kind of automobile data recorder, which is characterized in that set including the detection of life entity described in any one of claim 7-9
It is standby.
Priority Applications (2)
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| CN201910617282.2A CN110333541A (en) | 2019-07-09 | 2019-07-09 | A kind of life body detecting method, equipment and automobile data recorder |
| PCT/CN2019/105916 WO2021003841A1 (en) | 2019-07-09 | 2019-09-16 | Living body detection method and device, and driving recorder |
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| CN201910617282.2A CN110333541A (en) | 2019-07-09 | 2019-07-09 | A kind of life body detecting method, equipment and automobile data recorder |
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| CN112904438A (en) * | 2021-03-11 | 2021-06-04 | 兴科迪科技（泰州）有限公司 | Point cloud-based space scanning life body detection system and method |
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