CN113665356A - Vehicle-mounted alcohol detection system and method and automobile - Google Patents
Vehicle-mounted alcohol detection system and method and automobile Download PDFInfo
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- CN113665356A CN113665356A CN202111013734.XA CN202111013734A CN113665356A CN 113665356 A CN113665356 A CN 113665356A CN 202111013734 A CN202111013734 A CN 202111013734A CN 113665356 A CN113665356 A CN 113665356A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/02—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
- B60K28/06—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
- B60K28/063—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver preventing starting of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/02—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
- B60K28/06—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
- B60K28/066—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver actuating a signalling device
Abstract
The application relates to a vehicle-mounted alcohol detection system, a vehicle-mounted alcohol detection method and an automobile. The detection air pipe is communicated with an engine air inlet manifold and is connected to an air conditioner air outlet close to the driving position; the switch of the engine intake manifold controls the air supply or air cut-off of the engine intake manifold; the air pipe switch controls and detects the ventilation and the air cut-off of the air pipe; the alcohol detection sensor is positioned in the detection trachea; the data processing module is in signal connection with the alcohol detection sensor, compares the data detected by the alcohol detection sensor with a set alcohol threshold value, obtains a detection result and outputs the detection result. The alcohol detection sensor is difficult to be shielded through the arrangement, so that the alcohol detection is effective; in addition, the detection air pipe and the engine intake manifold provide a low-pressure space for accommodating air during detection, so that air in a cab can enter the detection air pipe conveniently.
Description
Technical Field
The application relates to the technical field of vehicle safety, in particular to a vehicle-mounted alcohol detection system and method and an automobile.
Background
At present, along with social development, a legal method is more and more healthy, and punishment of drunk driving and drunk driving is more and more severe. In order to prevent the drunk driving of the driver, punishment by law is avoided; in order to prevent drunk drivers from driving vehicles to harm public safety and protect the life and property safety of people, the vehicles are provided with a device or a system for detecting the content of air alcohol in the vehicles to detect whether the drivers drive drunk.
In some related technologies, one way is to detect the alcohol concentration exhaled by the driver through an alcohol sensor, and when a certain threshold is reached, the vehicle cannot be started, or simultaneously, drunk driving information is sent to a traffic police through a communication device to punish the driver; the other mode is to monitor whether the driver dozes off, faces away, has a drinking action and the like through a camera, if so, the vehicle cannot be started, or simultaneously send drunk driving information to a traffic police through communication equipment to punish the driver.
However, the following problems are present:
neglecting the subjective activity of the person, for example, the alcohol sensor and the camera may be easily obscured, making it difficult to detect whether the driver is drunk driving.
Disclosure of Invention
The embodiment of the application provides a vehicle-mounted alcohol detection system, a vehicle-mounted alcohol detection method and an automobile, and aims to solve the problem that in the related art, an alcohol sensor can be easily shielded, so that whether a driver is drunk or not is difficult to judge.
In a first aspect, a vehicle-mounted alcohol detection system is provided, which includes:
one end of the detection air pipe is communicated with an engine intake manifold, and the other end of the detection air pipe is connected to an air conditioner air outlet close to a driving position;
an engine intake manifold switch for controlling engine intake manifold ventilation or air shutoff;
the air pipe switch is arranged on the detection air pipe and controls the ventilation or the air cut-off of the detection air pipe;
the alcohol detection sensor is positioned in the detection air pipe and is positioned along the direction from an air outlet of an air conditioner to an air inlet manifold of an engine, and the alcohol detection sensor is positioned at the downstream of the air pipe switch;
and the data processing module is in signal connection with the alcohol detection sensor and is used for comparing the data detected by the alcohol detection sensor with a set alcohol threshold value to obtain a detection result and outputting the detection result.
In some embodiments, the detection device further comprises a pressure sensor disposed in the detection air pipe, the pressure sensor is located downstream of the alcohol detection sensor along the direction from the air conditioner outlet to the engine intake manifold, and is used for detecting the pressure change in the detection air pipe.
In some embodiments, the data processing module includes a determining unit and a display unit, wherein the determining unit is configured to compare data detected by the alcohol detection sensor with a set alcohol threshold to obtain a detection result; the display unit is used for displaying the detection result; or the like, or, alternatively,
the data processing module comprises a judging unit and an alarming unit, wherein the judging unit is used for comparing the data detected by the alcohol detection sensor with a set alcohol threshold value; the alarm unit is used for giving an alarm when the set alcohol threshold value is exceeded.
In some embodiments, the tracheal switch comprises:
a rotation rod, a part of which extends into the detection trachea; the other part of the air pipe penetrates through the detection air pipe and is connected with a turntable;
the circular baffle piece is positioned in the detection trachea, and the diameter of the circular baffle piece is equal to the inner diameter of the detection trachea;
the elastic reset piece is sleeved on the rotating rod, one end of the elastic reset piece is connected with the rotating disc, and the other end of the elastic reset piece is connected with the outer wall of the detection air pipe;
and the driving piece is connected with the turntable and is used for driving the turntable to drive the circular blocking piece to rotate so as to open and close the detection air pipe.
In some embodiments, the driver comprises:
a connecting rope wound around the turntable;
the magnetic connecting block is connected to one end, far away from the rotary table, of the connecting rope;
an electromagnet for attracting the connection block.
In a second aspect, an automobile is provided, and the automobile is provided with the vehicle-mounted alcohol detection system.
In a third aspect, a vehicle-mounted alcohol detection method is provided, which includes the following steps:
providing the vehicle-mounted alcohol detection system, and installing the vehicle-mounted alcohol detection system on an automobile;
closing an air inlet manifold switch of the engine and opening an air pipe switch within the set time of ignition of the engine so as to enable air in a cab to enter a detection air pipe;
detecting air flowing through the alcohol detection sensor by using the alcohol detection sensor, and sending detected data to the data processing module;
and comparing the data with the set alcohol threshold value by using the data processing module to obtain a detection result, and outputting the detection result.
In some embodiments, the set alcohol threshold comprises a first alcohol content threshold and a second alcohol content threshold, and the second alcohol content threshold is greater than the first alcohol content threshold;
the data processing module comprises a judging unit and an alarming unit;
and comparing the data with a set alcohol threshold value by using the data processing module to obtain a detection result, and outputting the detection result, wherein the method comprises the following steps:
the judging unit compares the alcohol content detected by the alcohol detection sensor with a first alcohol content threshold and a second alcohol content threshold;
if the alcohol content is smaller than the first alcohol content threshold value, no alarm is given;
if the alcohol content is greater than or equal to the first alcohol content threshold and smaller than the second alcohol content threshold, enabling the alarm unit to send out an alarm sound at a first frequency;
and if the alcohol content is greater than or equal to the second alcohol content threshold, enabling the alarm unit to send out an alarm sound at a second frequency, wherein the second frequency is greater than the first frequency.
In some embodiments, the on-board alcohol detection system further comprises a pressure sensor disposed in the detection air duct, along the direction from the air outlet to the intake manifold of the engine, the pressure sensor being located downstream of the alcohol detection sensor and being configured to detect a pressure change in the detection air duct;
after the engine intake manifold switch is closed, the air pipe switch is opened, and before the air flowing through the air pipe switch is detected by the alcohol detection sensor, the method further comprises the steps of:
detecting the pressure value in the detection trachea by using the pressure sensor, and sending the pressure value to a data processing module;
comparing the pressure value with a set pressure threshold value by using the data processing module;
if the pressure value is not equal to the set pressure threshold value, the data processing module is used for alarming;
and if the pressure value is equal to a second preset value, detecting the air flowing through the alcohol detection sensor by using the alcohol detection sensor.
In some embodiments, if the pressure value is not equal to the set pressure threshold, the method further includes displaying a fault code on a dashboard of the vehicle.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a vehicle-mounted alcohol detection system, a vehicle-mounted alcohol detection method and a vehicle, wherein an engine intake manifold switch is arranged on an engine intake manifold, control gas is introduced into an engine to start the engine, a detection gas pipe communicated with the engine intake manifold is additionally arranged, the other end of the detection gas pipe is arranged at an air outlet of an air conditioner, a gas pipe switch is arranged on the detection gas pipe to control air in a cab to enter the detection gas pipe, an alcohol detection sensor is arranged in the detection gas pipe to detect whether a driver is drunk or not, and the alcohol detection sensor is difficult to be shielded through the arrangement, so that alcohol detection is effective; in addition, because when detecting, the engine intake manifold switch is closed, and the trachea switch is opened to detect the intraductal space that is the lower pressure of trachea, can make the air in the driver's cabin fill fast to detecting in the trachea, detect trachea, engine intake manifold switch and trachea switch promptly this moment and provide a low pressure space that holds the air, be convenient for detect, consequently, avoid alcohol to detect the sensor and be sheltered from the influence detection effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic overall structure diagram of a vehicle-mounted alcohol detection system according to an embodiment of the present disclosure;
fig. 2 is a schematic connection diagram of a detection air pipe at an air outlet of an air conditioner according to an embodiment of the present application;
fig. 3 is a schematic view of an air tube switch provided in the embodiment of the present application.
In the figure: 1. detecting an air pipe; 2. an engine intake manifold; 3. an air outlet of the air conditioner; 4. an engine intake manifold switch; 5. an air pipe switch; 50. a rotating rod; 51. a turntable; 52. a circular baffle plate; 53. an elastic reset member; 54. a drive member; 540. connecting ropes; 541. connecting blocks; 542. an electromagnet; 6. an alcohol detection sensor; 7. a pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a vehicle-mounted alcohol detection system, a vehicle-mounted alcohol detection method and an automobile, and aims to solve the problem that in the related art, an alcohol sensor can be easily shielded, so that whether a driver is drunk or not is difficult to judge.
Referring to fig. 1, a vehicle-mounted alcohol detection system includes a detection air pipe 1, an engine intake manifold switch 4, an air pipe switch 5, an alcohol detection sensor 6 and a data processing module; one end of a detection air pipe 1 is used for being communicated with an engine intake manifold 2, and the other end of the detection air pipe is used for being connected to an air conditioner air outlet 3 close to a driving position; an engine intake manifold switch 4 is provided on the engine intake manifold 2 for controlling ventilation or air cut-off of the engine intake manifold 2.
The air pipe switch 5 is arranged on the detection air pipe 1 and at a position close to the air outlet 3 of the air conditioner, and is used for controlling the ventilation and air cut-off of the detection air pipe 1 at one end of the air outlet 3 of the air conditioner; alcohol detection sensor 6 is located in detecting trachea 1, and along air conditioner air outlet 3 to engine intake manifold 2 direction, alcohol detection sensor 6 is located the low reaches of trachea switch 5.
The data processing module is in signal connection with the alcohol detection sensor 6 and is used for comparing the data detected by the alcohol detection sensor 6 with a set alcohol threshold value to obtain a detection result and then outputting the detection result.
During detection, the engine intake manifold switch 4 is closed, the air pipe switch 5 is opened, so that air in the cab circulates along the direction from the air outlet 3 to the engine intake manifold 2, and contacts with the alcohol detection sensor 6 in the detection air pipe 1, so that the alcohol content in the air in the cab is detected, and whether drunk driving is judged.
The principle of the system setting is as follows:
because one end of the detection air pipe 1 is close to the air-conditioning air outlet 3 of the driving position, air exhaled by a driver can enter the detection air pipe 1 from the air-conditioning air outlet 3 at a short distance, and air is needed in the engine starting process, when the system starts detection, the engine intake manifold switch 4 and the air pipe switch 5 are both closed, less air, namely low pressure, is contained in the detection air pipe 1, when the engine intake manifold switch 4 is closed and the air pipe switch 5 is opened, high-pressure air in a driving cab flows to the low pressure, so that the air exhaled by the driver enters the detection air pipe 1, and at the moment, a part of the detection air pipe 1 and the engine intake manifold 2 provides a sufficient space for storing air.
In addition, because the alcohol detection sensor 6 is arranged in the detection air pipe 1 and is far away from the cab, the alcohol detection sensor is difficult to shield, and the problem that whether the driver is drunk or not is difficult to judge due to the fact that the alcohol detection sensor can be easily shielded in the related art is solved.
In addition, because the system is arranged in the structure, namely the detection air pipe 1 is connected with the engine intake manifold 2, the system can detect in the starting process of the engine and can also detect in the running process of the transmitter, and the specific steps are as follows:
during the starting process of the engine, detection is carried out, the engine intake manifold switch 4 is closed, the air pipe switch 5 is opened, high-pressure air in a cab flows to low pressure, air exhaled by a driver enters the detection air pipe 1, at the moment, the detection air pipe 1 and a part of the engine intake manifold 2 provide sufficient air storage space, and the alcohol detection sensor 6 detects air flowing through the detection air pipe.
During the operation of the transmitter, when detection is carried out, the engine air inlet manifold switch 4 and the air pipe switch 5 are both opened, and air is continuously consumed in the operation process of the engine, so that the air in the detection air pipe 1 is also continuously consumed, and the air in the cab can be ensured to enter the detection air pipe 1 from the air outlet 3 of the air conditioner all the time, so that the arriving air flow continuously circulates in the detection air pipe 1.
The above systems do not, after detecting the alcohol content, fail to start the car; or simultaneously sending drunk driving information to a traffic police through communication equipment to punish drivers; but the data processing module is used for prompting goodwill, but the data processing module does not obstruct the driver from using the vehicle, honors the property rights of the driver and improves the convenience of using the vehicle
In some preferred embodiments, when the air conditioner outlet 3 is closed during use of the system, there is a problem that air flows into the detection air pipe 1, so that the following settings are provided to facilitate detection of the system:
the system also comprises a pressure sensor 7 arranged in the detection air pipe 1, wherein the pressure sensor 7 is positioned at the downstream of the alcohol detection sensor 6 along the direction from the air outlet 3 of the air conditioner to the air inlet manifold 2 of the engine and is used for detecting the pressure change in the detection air pipe 1.
The principle is as follows: the pressure sensor 7 detects the pressure value in the detection air pipe 1, and under the normal condition, in the process that the alcohol detection sensor 6 detects, the pressure value of the detection air pipe 1 tends to a stable pressure value, and when the air-conditioning outlet 3 is blocked, the pressure value of the detection air pipe 1 changes, so that the change of the pressure value can be used as the basis for judging whether the air-conditioning outlet 3 is blocked.
Since the air pipe 1 may be broken due to a change in the pressure value, the engine intake manifold switch 4 is closed and the vehicle is not ignited as long as the pressure value is not equal to the set value or exceeds an error range in the determination. The driver is prevented from disabling the alcohol detection system by means of shielding and the like.
In some preferred embodiments, the data processing module is configured in two forms:
firstly, the data processing module comprises a judging unit and a display unit, wherein the judging unit is used for comparing the data detected by the alcohol detection sensor 6 with a set alcohol threshold value to obtain a detection result; the display unit is used for displaying the detection result;
secondly, the data processing module comprises a judging unit and an alarming unit, wherein the judging unit is used for comparing the data detected by the alcohol detection sensor 6 with a set alcohol threshold value; the alarm unit is used for giving an alarm when the set alcohol threshold value is exceeded.
Can be selected according to the actual requirement, or can be selected from both.
In some preferred embodiments, as shown in fig. 3, the following settings are made for the specific form of the air tube switch 5:
the air pipe switch 5 comprises a rotating rod 50, a circular blocking piece 52, an elastic resetting piece 53 and a driving piece 54, wherein the circular blocking piece 52 is positioned inside the detection air pipe 1, a sealing ring is arranged on the outer side of the circular blocking piece 52, and the diameter of the circular blocking piece 52 is equal to the inner diameter of the detection air pipe 1; one part of the rotating rod 50 extends into the detection air pipe 1 and is fixedly connected with a circular blocking piece 52, and the other part is connected with a rotating disc 51; the elastic reset piece 53 is sleeved on the rotating rod 50, one end of the elastic reset piece is connected with the rotating disc 51, and the other end of the elastic reset piece is connected with the outer wall of the detection air pipe 1; the driving member 54 is connected to the rotating disc 51 and is used for driving the rotating disc 51 to drive the circular blocking piece 52 to rotate so as to open and close the detection air tube 1.
Further, the driving member 54 is provided with a connecting rope 540, a connecting block 541 and an electromagnet 542, wherein one end of the connecting rope 540 is connected with the turntable 51 and wound on the outer side of the turntable 51, and the other end is connected with the magnetic connecting block 541; the electromagnet 542 is used for generating magnetic force to attract the connecting block 541, so as to drive the rotating disc 51 to rotate. The magnetic force is used as a driving source, and the magnetic force-based magnetic force sensor is simple in structure and low in cost.
In some preferred embodiments, as shown in fig. 2, the other end of the detection duct 1 is disposed in the width direction of the vehicle body and is connected to a grill of the blade fixing area of the air outlet 3. Set up like this and to reduce air outlet 3's space and occupy to do not influence the use of 3 department movable blade of air outlet of original air conditioner, also can satisfy the demand in the outward appearance, like the structural style shown in fig. 2 promptly, do not influence the interior trim of whole car pleasing to the eye, the feasibility of implementation is strong.
The application also provides an automobile which comprises the vehicle-mounted alcohol detection system. The vehicle equipped with the system can be detected during the starting process of the engine and can also be detected during the running process of the transmitter.
The application also provides a vehicle-mounted alcohol detection method, which comprises the following steps:
providing the vehicle-mounted alcohol detection system, and installing the vehicle-mounted alcohol detection system on an automobile;
in the set time of engine ignition, closing an engine intake manifold switch 4 and opening an air pipe switch 5 to enable air in a cab to enter a detection air pipe 1; the set time is a period of time during which the engine has not been successfully ignited, and preferably, the set time may be 5 seconds.
Detecting air flowing through the alcohol detection sensor 6 by using the alcohol detection sensor, and sending detected data to the data processing module;
and comparing the data with a set alcohol threshold value by using a data processing module to obtain a detection result, and outputting the detection result.
In some preferred embodiments, in order to distinguish drunk driving from drunk driving and prompt a driver, the following settings are performed for the step of comparing the data with the set alcohol threshold value by using the data processing module to obtain a detection result and outputting the detection result:
the set alcohol threshold comprises a first alcohol content threshold and a second alcohol content threshold, and the second alcohol content threshold is larger than the first alcohol content threshold, namely the first alcohol content threshold is a drunk driving value, and the second alcohol content threshold is a drunk driving value. The data processing module comprises a judging unit and an alarming unit
Comparing the alcohol content detected by the alcohol detection sensor 6 with a first alcohol content threshold and a second alcohol content threshold;
if the alcohol content is less than the first alcohol content threshold value, the alarm unit does not give an alarm, and the vehicle can be started normally, namely the engine intake manifold switch 4 is opened;
if the alcohol content is greater than or equal to the first alcohol content threshold and smaller than the second alcohol content threshold, the alarm unit sends out an alarm sound at a first frequency;
if the alcohol content is larger than or equal to the second alcohol content threshold value, the alarm unit sends out alarm sound at a second frequency, and the second frequency is larger than the first frequency.
Further, when drunk driving or drunk driving is detected, the data processing module also acquires and judges the speed of the vehicle, namely when the vehicle speed exceeds the set speed, the data processing module emits a third frequency, and the third frequency is a high-frequency harsh sound, so that the arrangement is that the driver is forced to carry out deceleration driving.
In some preferred embodiments, after closing the engine intake manifold switch 4, opening the air pipe switch 5, and before detecting air flow therethrough with the alcohol detection sensor 6, the method further comprises the steps of:
detecting and detecting the pressure value in the air pipe 1 by using a pressure sensor 7, and sending the pressure value to a data processing module;
comparing the pressure value with a set pressure threshold value by using a data processing module;
if the pressure value is not equal to the set pressure threshold value, the data processing module is used for alarming, and the engine intake manifold switch 4 is always in a closed state, so that the engine cannot obtain air, and the starting is finished;
if the pressure value is equal to the second preset value, the step of detecting the air flowing through the alcohol detection sensor 6 is performed.
The change of the pressure value can be used as a basis for judging whether the air outlet 3 of the air conditioner is blocked or not, and the condition that a driver disables the alcohol detection system through means such as shielding is prevented.
Furthermore, if the pressure value is not equal to the set pressure threshold value, the method further comprises the step of displaying a fault code on the automobile instrument panel, and the reason that the engine cannot be started is distinguished by the aid of the setting, so that confusion with other reasons that the transmitter cannot be started is avoided, and drivers are prevented from blocking the air outlet 3 of the air conditioner conveniently.
The principle of the application is as follows:
(1) because set up alcohol detection sensor 6 in detecting trachea 1 to keep away from the driver's cabin, therefore be difficult to shelter from, thereby avoided among the correlation technique alcohol sensor can be sheltered from very easily, lead to being difficult to judge the problem that whether driver drunk to drive.
(2) Because one end of the detection air pipe 1 is close to the air-conditioning air outlet 3 of the driving position, air exhaled by a driver can enter the detection air pipe 1 from the air-conditioning air outlet 3 at a short distance, and air is needed in the engine starting process, when the system starts detection, the engine intake manifold switch 4 and the air pipe switch 5 are both closed, less air, namely low pressure, is contained in the detection air pipe 1, when the engine intake manifold switch 4 is closed and the air pipe switch 5 is opened, high-pressure air in a driving cab flows to the low pressure, so that the air exhaled by the driver enters the detection air pipe 1, and at the moment, a part of the detection air pipe 1 and the engine intake manifold 2 provides a sufficient space for storing air.
(3) The pressure sensor 7 detects the pressure value in the detection air pipe 1, and under the normal condition, in the process that the alcohol detection sensor 6 detects, the pressure value of the detection air pipe 1 tends to a stable pressure value, and when the air-conditioning outlet 3 is blocked, the pressure value of the detection air pipe 1 changes, so that the change of the pressure value can be used as the basis for judging whether the air-conditioning outlet 3 is blocked.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An on-vehicle alcohol detection system, characterized in that it includes:
the air inlet pipe (1) is used for communicating with an engine air inlet manifold (2) at one end, and is connected to an air conditioner air outlet (3) close to a driving position at the other end;
an engine intake manifold switch (4) for controlling ventilation or air cut-off of the engine intake manifold (2);
the air pipe switch (5) is arranged on the detection air pipe (1) and controls the ventilation or the air cut-off of the detection air pipe (1);
the alcohol detection sensor (6) is positioned in the detection air pipe (1) and is along the direction from an air conditioner air outlet (3) to an engine air inlet manifold (2), and the alcohol detection sensor (6) is positioned at the downstream of the air pipe switch (5);
and the data processing module is in signal connection with the alcohol detection sensor (6) and is used for comparing the data detected by the alcohol detection sensor (6) with a set alcohol threshold value to obtain a detection result and outputting the detection result.
2. The vehicle alcohol detection system of claim 1, wherein:
the alcohol detection device is characterized by further comprising a pressure sensor (7) arranged in the detection air pipe (1) and located in the direction from an air outlet (3) of the air conditioner to an air inlet manifold (2) of the engine, wherein the pressure sensor (7) is located at the downstream of the alcohol detection sensor (6) and used for detecting pressure change in the detection air pipe (1).
3. The vehicle alcohol detection system of claim 1, wherein:
the data processing module comprises a judging unit and a display unit, wherein the judging unit is used for comparing data detected by the alcohol detection sensor (6) with a set alcohol threshold value to obtain a detection result; the display unit is used for displaying the detection result; or the like, or, alternatively,
the data processing module comprises a judging unit and an alarming unit, wherein the judging unit is used for comparing the data detected by the alcohol detection sensor (6) with a set alcohol threshold value; the alarm unit is used for giving an alarm when the set alcohol threshold value is exceeded.
4. The vehicle alcohol detection system according to claim 1, wherein the air pipe switch (5) includes:
a rotating rod (50) with a part extending into the detection air pipe (1); the other part of the air pipe penetrates through the detection air pipe (1) and is connected with a rotary table (51);
a circular baffle (52) which is positioned in the detection air pipe (1) and has a diameter equal to the inner diameter of the detection air pipe (1);
the elastic reset piece (53) is sleeved on the rotating rod (50), one end of the elastic reset piece is connected with the rotating disc (51), and the other end of the elastic reset piece is connected with the outer wall of the detection air pipe (1);
and the driving piece (54) is connected with the turntable (51) and is used for driving the turntable (51) to drive the circular blocking piece (52) to rotate so as to open and close the detection air pipe (1).
5. The vehicle alcohol detection system of claim 4, wherein the drive member (54) comprises:
a connection string (540) wound around the turntable (51);
the magnetic connecting block (541) is connected to one end, far away from the rotary disc (51), of the connecting rope (540);
an electromagnet (542) for attracting the connection block (541).
6. An automobile having an on-board alcohol detection system according to any one of claims 1 to 5.
7. The vehicle-mounted alcohol detection method is characterized by comprising the following steps:
providing the vehicle alcohol detection system of any one of claims 1-5, and mounting the vehicle alcohol detection system on a vehicle;
in the set time of engine ignition, closing the engine intake manifold switch (4) and opening the air pipe switch (5) to make the air in the cab enter the detection air pipe (1);
detecting air flowing through the alcohol detection sensor (6) by using the alcohol detection sensor, and sending detected data to the data processing module;
and comparing the data with the set alcohol threshold value by using the data processing module to obtain a detection result, and outputting the detection result.
8. The vehicle alcohol detection method of claim 7, wherein the set alcohol threshold comprises a first alcohol content threshold and a second alcohol content threshold, and wherein the second alcohol content threshold is greater than the first alcohol content threshold;
the data processing module comprises a judging unit and an alarming unit;
and comparing the data with a set alcohol threshold value by using the data processing module to obtain a detection result, and outputting the detection result, wherein the method comprises the following steps:
the judging unit compares the alcohol content detected by the alcohol detection sensor (6) with a first alcohol content threshold and a second alcohol content threshold;
if the alcohol content is smaller than the first alcohol content threshold value, no alarm is given;
if the alcohol content is greater than or equal to the first alcohol content threshold and smaller than the second alcohol content threshold, enabling the alarm unit to send out an alarm sound at a first frequency;
and if the alcohol content is greater than or equal to the second alcohol content threshold, enabling the alarm unit to send out an alarm sound at a second frequency, wherein the second frequency is greater than the first frequency.
9. The vehicle alcohol detection method according to claim 7, wherein the vehicle alcohol detection system further comprises a pressure sensor (7) disposed in the detection air pipe (1), the pressure sensor (7) being located downstream of the alcohol detection sensor (6) in a direction from an air outlet (3) to an engine intake manifold (2), and detecting a pressure change in the detection air pipe (1);
after closing the engine intake manifold switch (4), opening the air pipe switch (5), and before detecting air flowing therethrough with the alcohol detection sensor (6), the method further comprises the steps of:
detecting the pressure value in the detection air pipe (1) by using the pressure sensor (7), and sending the pressure value to a data processing module;
comparing the pressure value with a set pressure threshold value by using the data processing module;
if the pressure value is not equal to the set pressure threshold value, the data processing module is used for alarming;
and if the pressure value is equal to a second preset value, detecting the air flowing through the alcohol detection sensor (6) by using the alcohol detection sensor.
10. The vehicle-mounted alcohol detection method according to claim 9, characterized in that:
and if the pressure value is not equal to the set pressure threshold value, displaying a fault code on an automobile instrument panel.
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