CN108918461B - Drunk driving remote sensing detection method and system - Google Patents
Drunk driving remote sensing detection method and system Download PDFInfo
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Abstract
The invention provides a drunk driving remote sensing detection method and system, and belongs to the technical field of remote sensing monitoring. The method comprises the following steps: when a drunk driving remote sensing detection event occurs, a transmitting end transmits a first laser signal, a second laser signal and a third laser signal to a vehicle to be detected, wherein the wavelength of the first laser signal is the wavelength corresponding to a first absorption peak of alcohol gas, the first laser signal is not absorbed by window glass, the second laser signal is not absorbed by the alcohol gas, the wavelength of the third laser signal is the wavelength corresponding to a second absorption peak of the alcohol gas, and the third laser is absorbed by the window glass; and the receiving end receives the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, and judges whether drunk driving exists or not and whether window opening evasion check exists or not according to the received three signals. The method avoids the omission caused by the reduction of alcohol concentration in the vehicle by windowing, and improves the accuracy of drunk driving remote sensing detection.
Description
Technical Field
The invention relates to a drunk driving remote sensing detection method and system capable of identifying vehicle windowing and overdetection, and belongs to the technical field of remote sensing monitoring.
Background
In recent years, the number of automobiles in China is rapidly increased, the number of road traffic accidents therewith is increased, and huge life and property losses are brought to people's lives, wherein drunk driving is one of important reasons for traffic accidents. In order to deal with the serious traffic safety threat brought by drunk driving, public security traffic management departments write drunk driving into criminal law, but even then, drunk driving behaviors are still effectively controlled. In order to improve the coverage rate of drunk driving inspection, a public security traffic management department can only increase police strength and material resources and enlarge time periods and sections for inspection, but the public security traffic management department cannot remotely judge whether a driver drinks or not and can only inspect vehicles one by one due to the dependence on the traditional contact detection means, so that the efficiency is low and normal traffic is influenced. Therefore, how to effectively check drunk driving through technical means becomes one of the focuses of maintaining social public safety.
Most of traditional drunk driving monitors such as blood alcohol detection and breath alcohol detectors are contact detection, namely, a driver needs to actively blow air or contact a skin at a certain position on a body such as a hand, an arm and a foot, and the like, so that the drunk driving monitors are not suitable for remote detection. In practical application, the normal traffic of road traffic is seriously influenced, the road traffic efficiency is reduced, the time consumption is long, the detection efficiency is low, meanwhile, the detection method only adopts spot check, the detection coverage rate is limited, the omission factor is high, and a large amount of manpower and material resources are consumed.
At present, the applied drunk driving remote sensing detection devices comprise 201110182035.8, 201110182030.5, 201110452350.8, 201110453189.6 and the like, all of the devices adopt an optical non-contact type remote sensing mode to detect alcohol, so that the defects of the traditional detection method can be avoided to a certain extent, and the methods utilize characteristic absorption spectral lines of alcohol molecules to detect the content of alcohol gas exhaled by suspicious drunk drivers. However, due to the adoption of single-wavelength measurement, the method has the defects that the spectrum is single, the interference of other absorption gases on a path cannot be eliminated, and the discrimination of different substance molecules is poor, so that the discrimination error is large in real-time monitoring.
The patent (2017103250017) in the application adopts a dual-wavelength detection method, and although the detection accuracy of alcohol gas in the vehicle is improved, the problem that whether the vehicle is windowed cannot be judged in practical application is encountered. When a driver passes through a drunk driving detection point, if the alcohol concentration in the vehicle is deliberately reduced by windowing to avoid drunk driving remote sensing detection, missed detection is formed.
Disclosure of Invention
The technical problem solved by the invention is as follows: the drunk driving remote sensing detection method and system overcome the defects in the prior art, and the missed detection caused by reduction of alcohol concentration in the vehicle through windowing is avoided, so that the drunk driving remote sensing detection accuracy is improved.
In order to achieve the above purpose, the invention provides the following technical scheme:
a drunk driving remote sensing detection method comprises the following steps:
when a drunk driving remote sensing detection event occurs, a transmitting end transmits a first laser signal, a second laser signal and a third laser signal to a vehicle to be detected, wherein the wavelength of the first laser signal is the wavelength corresponding to a first absorption peak of alcohol gas, the first laser signal is not absorbed by window glass, the second laser signal is not absorbed by the alcohol gas, the wavelength of the third laser signal is the wavelength corresponding to a second absorption peak of the alcohol gas, and the third laser is absorbed by the window glass;
and the receiving end receives the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, and judges whether drunk driving exists or not and whether window opening evasion check exists or not according to the received three signals.
In an optional embodiment, the determining whether there is drunk driving and whether there is a window evasion check according to the three received signals includes:
determining a first alcohol gas concentration according to the received first laser signal and the second laser signal;
determining a second alcohol gas concentration according to the received second laser signal and the third laser signal;
and judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the first alcohol gas concentration and the second alcohol gas concentration.
In an alternative embodiment, the receiving end determines the first alcohol gas concentration according to equation (1):
determining the second alcohol gas concentration according to equation (2):
wherein C is the first alcohol gas concentration, C' is the second alcohol gas concentration, P1_tTransmitting power P for the transmitting end when transmitting the first laser signal2_tTransmitting power P for transmitting the second laser signal to the transmitting terminal3_tTransmitting power P for transmitting the third laser signal to the transmitting terminal1_rFor the receiving power, P, of the receiving end receiving the first laser signal2_rFor the receiving power, P, of the receiving end receiving the second laser signal3_rFor the receiving power, alpha, of the receiving end when receiving the third laser signal1Is the absorption coefficient, alpha, of the alcohol gas molecules at the wavelength of the first laser signal2Is the absorption coefficient, alpha, of the alcohol gas molecules at the wavelength of the second laser signal3And L is the absorption coefficient of the alcohol gas molecules at the wavelength of the third laser signal, and the path length of the laser signal from the transmitting end to the receiving end.
In an optional embodiment, determining whether there is drunk driving and whether there is a window evasion check according to the first alcohol gas concentration and the second alcohol gas concentration includes:
when the first alcohol gas concentration is greater than the second alcohol gas concentration, judging that the vehicle window is not opened, and when the first alcohol gas concentration is greater than a first preset value, judging that drunk driving exists;
and when the concentration of the first alcohol gas is equal to the concentration of the second alcohol gas, judging to open a window, and when the concentration of the first alcohol gas is greater than a second preset value, judging to open the window to avoid inspection, wherein the second preset value is smaller than the first preset value. In an optional embodiment, the wavelength of the first laser signal sent by the transmitting end is 1.396um, the wavelength of the second laser signal is 1.43um, and the wavelength of the third laser signal is 3.39 um.
A drunk driving remote sensing detection system, comprising: the transmitting device and the receiving device are oppositely arranged on two sides of a road, wherein:
the transmitting device is used for transmitting a first laser signal, a second laser signal and a third laser signal to a vehicle to be detected when a drunk driving remote sensing detection event occurs, wherein the wavelength of the first laser signal is the wavelength corresponding to a first absorption peak of alcohol gas, the first laser signal is not absorbed by vehicle window glass, the second laser signal is not absorbed by the alcohol gas, the wavelength of the third laser signal is the wavelength corresponding to a second absorption peak of the alcohol gas, and the third laser is absorbed by the vehicle window glass;
the receiving device is used for receiving the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, and judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the received three signals.
In an optional embodiment, the transmitting device includes a first transmitting module, a second transmitting module, a third transmitting module, and a beam controller, where the first transmitting module is configured to send laser with a first wavelength, the second transmitting module is configured to send laser with a second wavelength, the third transmitting module is configured to send laser with a third wavelength, the first transmitting module, the second transmitting module, and the third transmitting module are respectively connected to the beam controller, and the beam controller is configured to collimate the laser with the first wavelength, the laser with the second wavelength, and the laser with the third wavelength to obtain the first laser signal, the second laser signal, and the third laser signal, respectively.
In an optional embodiment, the receiving device includes an optical antenna, a signal processing module and a data processing module, the optical antenna is configured to receive a first laser signal, a second laser signal and a third laser signal after passing through the vehicle to be detected, the signal processing module is configured to convert the first laser signal, the second laser signal and the third laser signal received by the optical antenna into a corresponding first electrical signal, a corresponding second electrical signal and a corresponding third electrical signal, respectively, and the data processing module is configured to determine whether there is drunk driving and whether to open a window to avoid inspection according to the first electrical signal, the second electrical signal and the second electrical signal.
In an optional embodiment, the receiving means is configured to:
determining a first alcohol gas concentration according to the received first laser signal and the second laser signal;
determining a second alcohol gas concentration according to the received second laser signal and the third laser signal;
and judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the first alcohol gas concentration and the second alcohol gas concentration.
In an optional embodiment, the receiving means is configured to:
when the first alcohol gas concentration is greater than the second alcohol gas concentration, judging that the vehicle window is not opened, and when the first alcohol gas concentration is greater than a first preset value, judging that drunk driving exists;
and when the concentration of the first alcohol gas is equal to the concentration of the second alcohol gas, judging to open a window, and when the concentration of the first alcohol gas is greater than a second preset value, judging to open the window to avoid inspection, wherein the second preset value is smaller than the first preset value. Compared with the prior art, the invention has the beneficial effects that:
the drunk driving remote sensing detection method provided by the embodiment of the invention determines whether the concentration of the alcohol gas in the vehicle to be detected reaches the standard or not and identifies whether the vehicle window is closed or not by sending the laser signals with three different wavelengths to the vehicle to be detected and utilizing the concentration of the alcohol gas carried after the laser signals with the three different wavelengths are absorbed by the alcohol gas and the vehicle window glass and the information of the vehicle window glass, the method detects drunk driving behaviors in a remote sensing mode, does not influence normal road traffic, has high detection coverage rate and high detection efficiency on drunk driving vehicles, eliminates the influence of other environmental gases by the measuring method, and through the multi-wavelength setting, the drunk driving condition and whether the vehicle is windowed can be quickly judged, the behavior that the vehicle is deliberately windowed to escape detection during the over-detection can be effectively deterred, the omission caused by reduction of the alcohol concentration in the vehicle due to windowing is avoided, and the accuracy of drunk driving remote sensing detection is improved.
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Fig. 1 is a flow chart of a drunk driving remote sensing detection method provided by the embodiment of the invention;
fig. 2 is a schematic diagram of a drunk driving remote sensing detection system according to an embodiment of the present invention.
Detailed Description
The present invention will be further illustrated by the following preferred examples, but the present invention is not limited to the following examples.
Referring to fig. 1, an embodiment of the present invention provides a drunk driving remote sensing detection method, including the following steps:
step 101: when a drunk driving remote sensing detection event occurs, a transmitting end transmits a first laser signal, a second laser signal and a third laser signal to a vehicle to be detected, wherein the wavelength of the first laser signal is the wavelength corresponding to a first absorption peak of alcohol gas, the first laser signal is not absorbed by window glass, the second laser signal is not absorbed by the alcohol gas, the wavelength of the third laser signal is the wavelength corresponding to a second absorption peak of the alcohol gas, and the third laser is absorbed by the window glass;
specifically, in the embodiment of the present invention, the wavelengths of the three laser signals emitted by the emitting end are different, wherein the third laser is preferably strongly absorbed by the vehicle window glass;
step 102: and the receiving end receives the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, and judges whether drunk driving exists or not and whether window opening evasion check exists or not according to the received three signals.
Specifically, in the embodiment of the present invention, after receiving the first laser signal, the second laser signal, and the third laser signal after passing through the vehicle to be detected, the receiving end may convert the laser signals into electrical signals, and then perform data processing on the obtained electrical signals to obtain the alcohol gas concentration, and determine whether the signals pass through the window glass when passing through the vehicle to be detected according to the difference between the signals;
the drunk driving remote sensing detection method provided by the embodiment of the invention determines whether the concentration of the alcohol gas in the vehicle to be detected reaches the standard or not and identifies whether the vehicle window is closed or not by sending the laser signals with three different wavelengths to the vehicle to be detected and utilizing the concentration of the alcohol gas carried after the laser signals with the three different wavelengths are absorbed by the alcohol gas and the vehicle window glass and the information of the vehicle window glass, the method detects drunk driving behaviors in a remote sensing mode, does not influence normal road traffic, has high detection coverage rate and high detection efficiency on drunk driving vehicles, eliminates the influence of other environmental gases by the measuring method, and through the multi-wavelength setting, the drunk driving condition and whether the vehicle is windowed can be quickly judged, the behavior that the vehicle is deliberately windowed to escape detection during the over-detection can be effectively deterred, the omission caused by reduction of the alcohol concentration in the vehicle due to windowing is avoided, and the accuracy of drunk driving remote sensing detection is improved.
In an optional embodiment, the determining whether there is drunk driving and whether there is a window evasion check according to the three received signals includes: determining a first alcohol gas concentration according to the received first laser signal and the second laser signal; determining a second alcohol gas concentration according to the received second laser signal and the third laser signal; and judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the first alcohol gas concentration and the second alcohol gas concentration.
Specifically, in the embodiment of the invention, the alcohol gas concentration can be calculated by inverting according to the beam transmitting power and the echo power of the first laser signal and the second laser signal, and another alcohol gas concentration can be inverted according to the beam transmitting power and the echo power of the second laser signal and the third laser signal, and when the two alcohol gas concentrations are the same, it is proved that the light beam does not pass through the window glass and the detection omission exists; the method is simple in calculation and high in accuracy, and can further improve the remote sensing detection efficiency.
In one embodiment, the receiving end determines the first alcohol gas concentration according to equation (1):
determining the second alcohol gas concentration according to equation (2):
wherein C is the first alcohol gas concentration, C' is the second alcohol gas concentration, P1_tTransmitting power P for the transmitting end when transmitting the first laser signal2_tTransmitting power P for transmitting the second laser signal to the transmitting terminal3_tTransmitting power P for transmitting the third laser signal to the transmitting terminal1_rReceiving the first laser signal for the receiving endReceived power at number, P2_rFor the receiving power, P, of the receiving end receiving the second laser signal3_rFor the receiving power, alpha, of the receiving end when receiving the third laser signal1Is the absorption coefficient, alpha, of the alcohol gas molecules at the wavelength of the first laser signal2Is the absorption coefficient, alpha, of the alcohol gas molecules at the wavelength of the second laser signal3And L is the absorption coefficient of the alcohol gas molecules at the wavelength of the third laser signal, and the path length of the laser signal from the transmitting end to the receiving end.
Will be provided with
K, drunk driving warning threshold concentration C0The corresponding K ratio is recorded as K0When K is smaller than K in practical application0Then, it indicates that the alcohol gas concentration C is greater than the pre-warning concentration C0The system can be based on the K value and K0The comparison of the values outputs an alarm signal. The method can be used for converting the drunk driving warning threshold concentration C0Corresponds to K0As a judgment standard, whether the driver is drunk can be judged without calculating the alcohol gas concentration.
In an optional embodiment, determining whether there is drunk driving and whether there is a window evasion check according to the first alcohol gas concentration and the second alcohol gas concentration includes:
when the first alcohol gas concentration is greater than the second alcohol gas concentration, judging that the vehicle window is not opened, and when the first alcohol gas concentration is greater than a first preset value, judging that drunk driving exists; and when the concentration of the first alcohol gas is equal to the concentration of the second alcohol gas, judging to open a window, and when the concentration of the first alcohol gas is greater than a second preset value, judging to open the window to avoid inspection, wherein the second preset value is smaller than the first preset value.
Because the third laser signal can be strongly absorbed by the vehicle window glass, when the vehicle window glass exists, the alcohol gas concentration calculated by the third laser signal should be smaller than the alcohol gas concentration calculated by the first laser signal, and when the third laser signal and the first laser signal are the same, the vehicle window can be proved to be opened, and a driver has the suspicion of escaping monitoring; according to the condition that the vehicle window is opened, the judgment standard is reset, whether the window is opened for evasive inspection or not can be effectively judged, the missing inspection rate is reduced, and the accuracy rate of remote sensing detection is further improved.
Referring to fig. 2, an embodiment of the present invention further provides a drunk driving remote sensing detection system, for implementing the above method, where the system includes a transmitting device 1 and a receiving device 2 that are oppositely disposed on two sides of a road, where:
the device comprises an emitting device 1 and a detecting device, wherein the emitting device is used for sending a first laser signal, a second laser signal and a third laser signal to a vehicle to be detected when a drunk driving remote sensing detection event occurs, the wavelength of the first laser signal is the wavelength corresponding to a first absorption peak of alcohol gas, the first laser signal is not absorbed by vehicle window glass, the second laser signal is not absorbed by the alcohol gas, the wavelength of the third laser signal is the wavelength corresponding to a second absorption peak of the alcohol gas, and the third laser is absorbed by the vehicle window glass; the receiving device 2 is used for receiving the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, and judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the received three signals.
The drunk driving remote sensing detection system provided by the embodiment of the invention sends three laser signals with different wavelengths to a vehicle to be detected, determines whether the concentration of alcohol gas in the vehicle to be detected reaches the standard or not and identifies whether the vehicle window is closed or not by utilizing the concentration of the alcohol gas carried after the three laser signals with different wavelengths are absorbed by the alcohol gas and the vehicle window glass and the information of the vehicle window glass, the method detects drunk driving behaviors in a remote sensing mode, does not influence normal road traffic, has high detection coverage rate and high detection efficiency on drunk driving vehicles, eliminates the influence of other environmental gases by the measuring method, and through the multi-wavelength setting, the drunk driving condition and whether the vehicle is windowed can be quickly judged, the behavior that the vehicle is deliberately windowed to escape detection during the over-detection can be effectively deterred, the omission caused by reduction of the alcohol concentration in the vehicle due to windowing is avoided, and the accuracy of drunk driving remote sensing detection is improved.
The transmitting device comprises a first transmitting module, a second transmitting module, a third transmitting module and a beam controller 8, in the embodiment of the invention, each transmitting module comprises a driver and a laser (as shown in fig. 2, the first transmitting module comprises a first driver 5 and a first laser 2, the second transmitting module comprises a second driver 6 and a second laser 3, the third transmitting module comprises a third driver 7 and a third laser 4), the driver, the lasers and the beam controller are connected through optical fibers, the driver controls the lasers to transmit laser with stable wavelength through current (the first transmitting module is used for transmitting laser with first wavelength, the second transmitting module is used for transmitting laser with second wavelength, the third transmitting module is used for transmitting laser with third wavelength), each laser outputs coaxially, the beam controller 8 is used for collimating laser with each wavelength, and respectively obtaining laser signals corresponding to the wavelengths. The transmitting device can obtain stable laser signals, and the accuracy of remote sensing detection is further improved.
As shown in fig. 2, the receiving device 2 includes an optical antenna 9, a signal processing module (including a detector 10 and a filtering and amplifying unit 11), and a data processing module (including a signal extracting unit 12 and an early warning information identifying unit 13), where the optical antenna 9 is configured to receive a first laser signal, a second laser signal, and a third laser signal after passing through the vehicle to be detected, the signal processing module is configured to convert the first laser signal, the second laser signal, and the third laser signal received by the optical antenna 9 into a corresponding first electrical signal, a corresponding second electrical signal, and a corresponding third electrical signal, respectively, and the data processing module is configured to determine whether there is drunk driving and whether to open a window to avoid inspection according to the first electrical signal, the second electrical signal, and the second electrical signal. The receiving device can ensure that the laser signals passing through the vehicle to be detected are accurately received, and the accuracy of a calculation result is ensured.
In an alternative embodiment, the receiving means 2 are adapted to:
determining a first alcohol gas concentration according to the received first laser signal and the second laser signal;
determining a second alcohol gas concentration according to the received second laser signal and the third laser signal;
and judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the first alcohol gas concentration and the second alcohol gas concentration.
In an optional embodiment, the receiving device is configured to:
when the first alcohol gas concentration is greater than the second alcohol gas concentration, judging that the vehicle window is not opened, and when the first alcohol gas concentration is greater than a first preset value, judging that drunk driving exists; and when the concentration of the first alcohol gas is equal to the concentration of the second alcohol gas, judging to open a window, and when the concentration of the first alcohol gas is greater than a second preset value, judging to open the window to avoid inspection, wherein the second preset value is smaller than the first preset value. The following is a specific embodiment of the present invention:
as shown in fig. 1, an embodiment of the present invention provides a drunk driving remote sensing detection system, including an emitting device 1 and a receiving device 2, where the emitting device 1 includes a first emitting module, a second emitting module, a third emitting module and a light beam controller 8, where the first emitting module includes a first driver 5 and a first laser 2, the second emitting module includes a second driver 6 and a second laser 3, the third emitting module includes a third driver 7 and a third laser 4, the first laser 2 is a laser with a wavelength of 1.396um, the second laser 3 is a laser with a wavelength of 1.43um, and the third laser 4 is a laser with a wavelength of 3.39 um; the receiving device 2 comprises an optical antenna 9, a signal processing module (comprising a detector 10 and a filtering amplification unit 11) and a data processing module (comprising a signal extraction unit 12 and an early warning information identification unit 13), the optical wire 9 is coaxial with the light beam controller 8, the signal processing module is positioned at the rear end of the optical antenna 9, the photoelectric detector 10 converts a laser signal forwarded by the optical antenna 9 into an electric signal, the electric signal is amplified by the filtering amplification unit 11 and then sent to the signal extraction unit 12, and then the electric signal is sent to the early warning information identification unit 13 by the signal extraction unit 12. The transmitting device 1 and the receiving device 2 are respectively positioned in the boxes at two sides of a road.
The transmitting device and the receiving device are respectively erected on two sides of a road, when a vehicle passes through the transmitting device, the transmitting module outputs laser with stable wavelength through current control, the laser is collimated by the light beam controller and then is transmitted to a drunk driving vehicle, gas in the drunk driving vehicle is absorbed, and the laser is received by the receiving device and then enters the subsequent module for signal analysis, data processing and early warning information identification.
Alcohol gas molecules have a more obvious absorption peak between 1.418um to 1.379um, the peak position is at 1.396um, the peak valley position is at 1.429um, the absorption peak is narrower relative to the absorption peaks at 2.74um, 3.39um, 7.2um, 8.05um and 9.05um, and near-infrared band lasers and detectors are easy to obtain. The alcohol gas molecule has an absorption peak at 3.39um, and the car glass has obvious absorption at the wavelength. The alcohol concentration was inverted using the differential absorption of the alcohol gas molecules at 1.396um and 1.429um wavelengths. Two inversion results of 1.396um/1.429um and 3.39um/1.429um are used to identify the window opening and closing state.
The specific alcohol gas concentration calculation method comprises the following steps:
determining a first alcohol gas concentration according to equation (1):
determining the second alcohol gas concentration according to equation (2):
wherein C is the first alcohol gas concentration, C' is the second alcohol gas concentration, P1_tTransmitting power P for the transmitting end when transmitting the first laser signal2_tTransmitting power P for transmitting the second laser signal to the transmitting terminal3_tTransmitting power P for transmitting the third laser signal to the transmitting terminal1_rFor the receiving power, P, of the receiving end receiving the first laser signal2_rFor the receiving power, P, of the receiving end receiving the second laser signal3_rFor the receiving power, alpha, of the receiving end when receiving the third laser signal1Is alcohol gas molecule in the firstAbsorption coefficient at the wavelength of the laser signal, alpha2Is the absorption coefficient, alpha, of the alcohol gas molecules at the wavelength of the second laser signal3And L is the absorption coefficient of the alcohol gas molecules at the wavelength of the third laser signal, and the path length of the laser signal from the transmitting end to the receiving end.
Will be provided with
K, drunk driving warning threshold concentration C0The corresponding K ratio is recorded as K0When K is smaller than K in practical application0Then, it indicates that the alcohol gas concentration C is greater than the pre-warning concentration C0The system can be based on the K value and K0The comparison of the values outputs an alarm signal.
When the window is opened, C ' is equal to C, and when the window is closed, C ' is smaller than C, so that the opening and closing state of the window can be judged according to the numerical values of C ' and C.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (5)
1. A drunk driving remote sensing detection method is characterized by comprising the following steps:
when a drunk driving remote sensing detection event occurs, a transmitting end transmits a first laser signal, a second laser signal and a third laser signal to a vehicle to be detected, wherein the wavelength of the first laser signal is the wavelength corresponding to a first absorption peak of alcohol gas, the first laser signal is not absorbed by window glass, the second laser signal is not absorbed by the alcohol gas, the wavelength of the third laser signal is the wavelength corresponding to a second absorption peak of the alcohol gas, and the third laser is absorbed by the window glass;
the receiving end receives the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, and judges whether drunk driving exists or not and whether window opening evasion check exists or not according to the received three signals;
whether drunk driving exists or not is judged according to the received three signals, and the method comprises the following steps:
determining a first alcohol gas concentration according to the received first laser signal and the second laser signal;
determining a second alcohol gas concentration according to the received second laser signal and the third laser signal;
judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the first alcohol gas concentration and the second alcohol gas concentration;
the receiving end determines the first alcohol gas concentration according to the formula (1):
determining the second alcohol gas concentration according to equation (2):
wherein C is the first alcohol gas concentration, C' is the second alcohol gas concentration, P1_tTransmitting power P for the transmitting end when transmitting the first laser signal2_tTransmitting power P for transmitting the second laser signal to the transmitting terminal3_tTransmitting power P for transmitting the third laser signal to the transmitting terminal1_rFor the receiving power, P, of the receiving end receiving the first laser signal2_rFor the receiving power, P, of the receiving end receiving the second laser signal3_rFor the receiving power, alpha, of the receiving end when receiving the third laser signal1Is the absorption coefficient, alpha, of the alcohol gas molecules at the wavelength of the first laser signal2For alcohol gas molecules at the wavelength of the second laser signalAbsorption coefficient of (a)3The absorption coefficient of the alcohol gas molecules at the wavelength of the third laser signal is shown, and L is the path length of the laser signal from the transmitting end to the receiving end;
judging whether drunk driving exists or not and whether window-opening evasion check exists or not according to the first alcohol gas concentration and the second alcohol gas concentration, wherein the method comprises the following steps of:
when the first alcohol gas concentration is greater than the second alcohol gas concentration, judging that the vehicle window is not opened, and when the first alcohol gas concentration is greater than a first preset value, judging that drunk driving exists;
and when the concentration of the first alcohol gas is equal to the concentration of the second alcohol gas, judging to open a window, and when the concentration of the first alcohol gas is greater than a second preset value, judging to open the window to avoid inspection, wherein the second preset value is smaller than the first preset value.
2. The drunk driving remote sensing detection method according to claim 1, wherein the wavelength of the first laser signal sent by the transmitting end is 1.396um, the wavelength of the second laser signal is 1.43um, and the wavelength of the third laser signal is 3.39 um.
3. A drunk driving remote sensing detection system is characterized by comprising: the transmitting device and the receiving device are oppositely arranged on two sides of a road, wherein:
the transmitting device is used for transmitting a first laser signal, a second laser signal and a third laser signal to a vehicle to be detected when a drunk driving remote sensing detection event occurs, wherein the wavelength of the first laser signal is the wavelength corresponding to a first absorption peak of alcohol gas, the first laser signal is not absorbed by vehicle window glass, the second laser signal is not absorbed by the alcohol gas, the wavelength of the third laser signal is the wavelength corresponding to a second absorption peak of the alcohol gas, and the third laser is absorbed by the vehicle window glass;
the receiving device is used for receiving the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, and judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the received three signals;
the receiving means is for:
determining a first alcohol gas concentration according to the received first laser signal and the second laser signal;
determining a second alcohol gas concentration according to the received second laser signal and the third laser signal;
judging whether drunk driving exists or not and whether window opening evasion check exists or not according to the first alcohol gas concentration and the second alcohol gas concentration;
the receiving device is configured to:
when the first alcohol gas concentration is greater than the second alcohol gas concentration, judging that the vehicle window is not opened, and when the first alcohol gas concentration is greater than a first preset value, judging that drunk driving exists;
and when the concentration of the first alcohol gas is equal to the concentration of the second alcohol gas, judging to open a window, and when the concentration of the first alcohol gas is greater than a second preset value, judging to open the window to avoid inspection, wherein the second preset value is smaller than the first preset value.
4. The drunk driving remote sensing detection system according to claim 3, wherein the transmitting device comprises a first transmitting module, a second transmitting module, a third transmitting module and a beam controller, the first transmitting module is used for transmitting laser with a first wavelength, the second transmitting module is used for transmitting laser with a second wavelength, the third transmitting module is used for transmitting laser with a third wavelength, the first transmitting module, the second transmitting module and the third transmitting module are respectively connected with the beam controller, and the beam controller is used for collimating the laser with the first wavelength, the laser with the second wavelength and the laser with the third wavelength to respectively obtain the first laser signal, the second laser signal and the third laser signal.
5. The drunk driving remote sensing detection system according to claim 3, wherein the receiving device comprises an optical antenna, a signal processing module and a data processing module, the optical antenna is used for receiving the first laser signal, the second laser signal and the third laser signal after passing through the vehicle to be detected, the signal processing module is used for converting the first laser signal, the second laser signal and the third laser signal received by the optical antenna into a corresponding first electric signal, a corresponding second electric signal and a corresponding third electric signal respectively, and the data processing module is used for judging whether drunk driving exists or not and whether window opening is carried out to avoid inspection or not according to the first electric signal, the second electric signal and the second electric signal.
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| CN111007030B (en) * | 2019-12-11 | 2020-10-16 | 华中科技大学 | Electronic eye integrated drunk driving detection device based on laser radar |
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