CN103149599A - System and method for cab avoidance of vehicles of highway green detection channel - Google Patents
System and method for cab avoidance of vehicles of highway green detection channel Download PDFInfo
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Abstract
The invention relates to a system and a method for cab avoidance of vehicles of a highway green detection channel. The system comprises a first group of sensor nodes, a second group of sensor nodes, a third group of sensor nodes, a ray generator, a ray detector and a controller, wherein each group of sensor nodes consists of a pair of light pillars, each pair of light pillars is provided with three pairs of photoelectric switches, the controller is used for preprocessing the vehicle information, the vehicles are classified into trailer vehicles and non-trailer vehicles, and a proper time is obtained by analysis and judgment to open and close the ray generator. The system and the method have the advantages that the problem of the cab avoidance of the detected vehicles of the highway green detection channel is solved, the safety of driving persons is ensured, the efficiency is high, the cost is low, and the practicality is high.
Description
Technical field
The invention belongs to a kind of control system of highway green channel detection field and a kind of method of discrimination corresponding with it, particularly relate to a kind of highway green test passage pilothouse avoidance system and the preventing collision method corresponding with it.
Background technology
Country is smooth and easy for setting up, fresh and live agricultural product distribution network easily, has carried out the building-up work of highway green channel, for the vehicle that satisfies the green channel requirement, toll is exempted from enjoyment.Yet the part vehicle is but secured personal gain national policy, and the means such as utilization loads in mixture, camouflage escape to pay freeway toll.For a green inspection that is open to traffic, be to check by artificial mode traditionally, this inspection method inefficiency does not reach yet and checks well effect.
The main method of highway green channel detection at present has organoleptic method, tonnage laws, endoscope check method and nondestructive determination.Organoleptic method mainly is fixed against the supervisory personnel and detects by sense of touch, vision and sense of smell; Tonnage laws calculates equivalent density by weight and the size of measuring vehicle, thereby infers the general article of vehicle loading.There is the shortcoming that inspection speed is slow, personnel's working strength is large, accuracy is low in these two kinds of methods, and direct violation evidence can't be provided.The endoscope check method can extend people's sighting distance, and can change arbitrarily direction of visual lines, observe exactly the real conditions of object inside surface, check the article that load in the compartment, but the endoscope check method still can increase inspector's workload, and detect still more unilaterally, just local location is detected, can not detect whole compartment.The Non-Destructive Testing rule mainly adopts radar detection technique, actinoscopy X technology.Therefore radar detection technique has certain limitation due to can not penetrating metal in application.And the penetration power of ray is very strong, therefore utilizes the actinoscopy X technology Green Vehicle inspection to be become the problem of hot research, and has successively the expert that the technology such as x ray, Co-60 are applied to green channel vehicle automatic inspection system.Patent CN101532968A has announced a kind of vehicle check system for green channel.This patent is fixed on certain position with radiographic source and ray detector, utilizes the transmitted intensity that ray detector receives that goods in car is detected automatically.The radiographic source that this patent is used is penetrated as Co-60 or X.Patent CN101943761A has announced a kind of detection method of X-ray.This patent can realize that transmission plot and backward scattering figure merge, and further enriches the safety check image information, improves safety inspector's observation and recognition efficiency, and this patent can adopt radiation ray source is X ray.Patent CN202110299U has announced goods inspection system for vehicles on green channels.In addition, patent CN102508313A has also announced a kind of " detecting the method and system of means of transport ", this patent utilization radiation source scans vehicle, the intensity of the hard radiation that then receives according to ray detector is set up grey scale curve, judges at last the type of vehicle institute cargo according to different gray thresholds.
Although the actinoscopy X technology is a kind of nondestructiving detecting means fast and efficiently, can solve well the problem of existing green channel detection difficult, but X ray, gamma-rays and Co-60 for generally using use any ray can damage human body.When ray shines directly into human body, although the radiant quantity of a radiation exposure is very little, along with the increase of radiation exposure number of times and accumulation will inevitably damage human body.Therefore when the actinoscopy X technology being applied to the green channel detection, must guarantee the personal safety of driver and conductor in pilothouse.In view of above reason, must avoid pilothouse when using roentgenoscopeX that green currency car is detected, only loading space is detected.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of accurate, efficient, real-time highway green test passage pilothouse avoidance system and method, reduces or avoids ray to personnel's damage.
A kind of highway green test passage vehicle cab avoidance system, the pilothouse avoidance system comprises: first group of sensor node, second group of sensor node and the 3rd group of sensor node, every group of sensor node all is comprised of a pair of light beam, and three pairs of optoelectronic switches are installed on every pair of light beam; Ray generator and ray detector, ray detector are used for receiving the ray that ray generator sends; Controller receives the level skip signal of optoelectronic switch in every group of sensor node, draws vehicle in position and the speed of surveyed area, and the position relationship between judgement pilothouse, container and ray generator is controlled the opening and closing of ray generator; First group of sensor node, second group of sensor node and the 3rd group of sensor node are arranged in order along the direction of the admission passage of vehicle, ray generator and ray detector are arranged between second group of sensor node and the 3rd group of sensor node, and near second group of sensor node.
As a kind of preferred, three pairs of optoelectronic switches all are installed on every pair of light beam, be followed successively by from top to bottom optoelectronic switch one, optoelectronic switch two and optoelectronic switch three; Be spaced apart 0.3 meter between optoelectronic switch, optoelectronic switch one is 1.7-2 rice apart from the height on ground.
As a kind of preferred, distance between first group of sensor node and second group of sensor node is 2.5-3 rice, spacing between second group of sensor node and the 3rd group of sensor node is 2.5-3 rice, and the spacing of second group of sensor node and ray generator is 0.4-0.8 rice.
As a kind of preferred, optoelectronic switch one is 1.9 meters apart from the height on ground.
As a kind of preferred, distance between first group of sensor node and second group of sensor node is 2.8 meters, spacing between second group of sensor node and the 3rd group of sensor node is 2.7 meters, and the spacing of second group of sensor node and ray generator is 0.5 meter.
A kind of highway green test passage vehicle cab preventing collision method, step 1: vehicle need to enter green channel vehicle detection zone with the speed of a motor vehicle of 5-10 kilometer per hour, when Vehicle Driving Cycle is crossed some light beams, all optoelectronic switches on light beam all are in off-state, and sensor node becomes output low level from the output high level; Controller is accepted the signal of sensor node, judges speed and the position of vehicle in surveyed area; Step 2: vehicle is carried out the information of vehicles pre-service by first group of sensor node and second group of sensor node, vehicle is divided into " tractor-trailer " and " non-tractor-trailer ", when second group of sensor node of the anterior arrival of tested vehicle cab, if first group of sensor node is in on-state, judge that detected vehicle is tractor-trailer; If first group of sensor node is in its unaccessed state, judge that tested vehicle is non-tractor-trailer; Step 3: if vehicle is tractor-trailer, judge the relative position of vehicle loading front end and second group of sensor node and the relative position of vehicle loading afterbody and second group of sensor node; If detected vehicle is non-tractor-trailer, judge the relative position of vehicle loading front end and the 3rd group of sensor node and the relative position of vehicle loading afterbody and second group of sensor node; The vehicle cab front end is respectively T1 and V1 from time and the average velocity that first group of sensor node drives to second group of sensor node; The time and the average velocity that drive to the 3rd group of sensor node from second group of sensor node are respectively T2 and V2; The goods carriage of trucks afterbody is respectively T3 and V3 from time and the average velocity that first group of sensor node drives to second group of sensor node; Step 4: if vehicle is tractor-trailer, after the 3rd group of sensor node of the anterior arrival of pilothouse, and continue to wait until when the vehicle loading front end arrives second group of light beam, 0.5/V2 is after second in time-delay, opens ray generator; If detected vehicle is non-tractor-trailer, after the 3rd group of sensor node of the anterior arrival of vehicle cab, directly open ray generator; No matter being tractor-trailer, is also non-tractor-trailer, and after the vehicle loading afterbody arrived second group of sensor node, 0.5/V3 was after second in time-delay, closes ray generator.
As a kind of preferred, if ray generator is opened, fully by after surveyed area, controller could not receive normal end signal, hard closing this moment ray generator when tested vehicle loading.
As a kind of preferred, during by surveyed area, vehicle is parked in surveyed area when tested vehicle loading, if need the hard closing ray generator, and can be by completing manually.
As a kind of preferred, ray generator be opened into the shut-in time interval on be limited to 25 seconds.
Useful technique effect:
Can know and detect vehicle in the position of surveyed area, can hold more accurately and efficiently the opportunity of ray generator opening and closing, that is: the emission port by ray generator when pilothouse, open X-ray machine X when the compartment arrives the emission port of ray generator, close ray generator when the tailstock sails out of the ray generator emission port.This avoidance system and method are applied to can process well the pilothouse Avoidance in the highway green channel detection system, guarantee that whole testing process only partly scans goods carriage of trucks, avoids ray to driver.
Description of drawings
Fig. 1 is the highway green test passage pilothouse avoidance system of the embodiment of the present invention;
Fig. 2 is the structural drawing of the sensor node of the embodiment of the present invention;
Fig. 3 is the lorry pick-up unit schematic diagram of the embodiment of the present invention;
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.Below description only is used for explanation the present invention, but is not to limit the scope of the invention.
A kind of highway green test passage vehicle cab avoidance system and method are as shown in Figure 1, specifically comprise 6 parts: 102, the three groups of sensor nodes 103 of 101, the second groups of sensor nodes of first group of sensor node, ray generator 104, ray detector 105 and controller 106.Every group of sensor node all is comprised of a pair of light beam, and three pairs of optoelectronic switches are installed on light beam; Controller 106 obtains level signal or level skip signal by the break-make of optoelectronic switch in every group of sensor node, carry out again reasoning and correlation computations, and then draw vehicle come in and go out position and the state of surveyed area, only have when truck cab fully by ray generator 104 emission ports, and loading space just starts ray generator 104 when arriving ray generator 104 emission port, closes ray generator 104 when goods carriage of trucks crosses ray generator 104 emission port fully.
As a kind of preferred, that ray generator 104 is launched is X ray, gamma-rays or Co-60.
In described avoidance system, the structure of three groups of sensor nodes is identical, the structural drawing of sensor node as shown in Figure 2, wherein, every group of sensor node all is made of a pair of light beam, be respectively transmitting terminal light beam 201 and reflection end light beam 202, three pairs of optoelectronic switches all are installed on light beam, are followed successively by from top to bottom optoelectronic switch 1, optoelectronic switch 2 204 and optoelectronic switch 3 205.The installation of optoelectronic switch need to keep suitable height, and as a kind of preferred height, it is 1.9 meters apart from the height on ground that optoelectronic switch 1 is set, and optoelectronic switch 3 204 is 1.6 meters apart from the height on ground, and optoelectronic switch 3 205 is 1.3 meters apart from the height on ground.
Spacing in described avoidance system between three groups of sensor nodes and ray generator 104 need to arrange suitable spacing, measure by the actual measurement to a large amount of green channel vehicle dimensions, distance between first group of sensor node and second group of sensor node is 2.5-3 rice, spacing between second group of sensor node and the 3rd group of sensor node is 2.5-3 rice, and the spacing of second group of sensor node and ray generator is 0.4-0.8 rice.As a kind of preferred, final spacing is set to: the distance between first group of sensor node 101 and second group of sensor node 102 is 2.8 meters, spacing between second group of sensor node 102 and the 3rd group of sensor node 103 is 2.7 meters, second group of sensor node 102 is 0.5 meter with the spacing of ray generator 104, and ray generator 104 is arranged between second group of sensor node 102 and the 3rd group of sensor node 103.
The lorry pick-up unit schematic diagram of a kind of highway green test passage pilothouse avoidance system and method as shown in Figure 3.At first lorry need to travel according to rate request, with the speed of a motor vehicle of 5-10 kilometer per hour by green channel vehicle detection zone.When lorry did not arrive surveyed area, all electric switches on light beam all were in on-state, sensor node output high level; When lorry travelled some light beams, all optoelectronic switches on light beam all were in off-state, the sensor node output low level; When light beam by on-state to off-state or by off-state to on-state, the sensor node output level will produce saltus step.Lorry is in the process that surveyed area travels, and level signal and the skip signal of three groups of light beam generations provide signal source for avoidance system.The signal source that controller 106 produces by light beam is carried out pre-service to lorry information, and judges the relative position of lorry in surveyed area.
Lorry by highway green test passage is carried out analytic statistics, and highway green test passage pilothouse avoidance system is divided into lorry " tractor-trailer " and " non-tractor-trailer " two types.It is different from spacing between pilothouse that the difference of this vehicle maximum of two types is exactly the container that articulates, container and pilothouse that " tractor-trailer " articulates have 70---the spacing of 200cm, spacing between " non-tractor-trailer " container and pilothouse is very little, can not surpass 30cm, therefore this has just determined that the logic that ray generator 104 is opened is different in the process in these two types of tested vehicle passing detection zones.The type of determining lorry is the prerequisite that realizes that accurately pilothouse is dodged.Can carry out the pre-service of lorry information to lorry by first group of sensor node 101 and second group of sensor node 102, lorry is divided into " tractor-trailer " and " non-tractor-trailer ".When second group of sensor node 102 of tested truck cab 107 anterior arrival, if first group of sensor node 101 is in on-state, judge that detected vehicle is " tractor-trailer "; If first group of sensor node 101 is in its unaccessed state, judge that tested lorry is " non-tractor-trailer ".On the basis that lorry is divided into " tractor-trailer " and " non-tractor-trailer ", need further to determine the relative position of truck cab and goods carriage of trucks and ray generator 104.Controller 106 carries out reasoning and calculating according to the signal that three groups of sensor nodes provide, and obtains the relative position of truck cab and goods carriage of trucks and ray generator 104 emission ports and lorry in the speed of travelling of surveyed area.If lorry is " tractor-trailer ", need to judge the relative position of goods carriage of trucks front end and second group of sensor node 102 and the relative position of goods carriage of trucks 108 afterbodys and second group of sensor node 102; If detected vehicle is " non-tractor-trailer ", need to judge the relative position of goods carriage of trucks front end and the 3rd group of sensor node 103 and the relative position of goods carriage of trucks afterbody and second group of sensor node 102.The truck cab front end is respectively T1 and V1 from time and the average velocity that first group of sensor node 101 drives to second group of sensor node 102; The time and the average velocity that drive to the 3rd group of sensor node 103 from second group of sensor node 102 are respectively T2 and V2; The goods carriage of trucks afterbody is respectively T3 and V3 etc. from time and the average velocity that first group of sensor node 101 drives to second group of sensor node 102.
Determine lorry on the basis of the relative position of surveyed area, can control better the opening and closing of ray generator 104.If lorry is " tractor-trailer ", after the 3rd group of sensor node 103 of the anterior arrival of pilothouse, and continue to wait until when the goods carriage of trucks front end arrives second group of light beam, 0.5/V2 is after second in time-delay, opens ray generator 104; If detected vehicle is " non-tractor-trailer ", after the 3rd group of sensor node 103 of the anterior arrival of truck cab, directly open ray generator 104; No matter be " tractor-trailer " or " non-tractor-trailer ", after the goods carriage of trucks afterbody arrived second group of sensor node 102,0.5/V3 was after second in time-delay, closes ray generator.
Increasing different time-delays in moment of ray generator 104 opening and closing is because have the gap between second group of sensor node and ray generator 104, processing like this is in the situation that the speed of a motor vehicle is inhomogeneous in order to guarantee, no matter be that " tractor-trailer " or " non-tractor-trailer " all can accurately be avoided opening ray generator 104 after pilothouse, can after sailing out of ray generator 104 fully, the tailstock close ray generator 104 again.
For the use X-ray Testing Technology of safety, must open until the time interval of closing limits ray generator 104, set the upper limit T at 104 opening time of ray generator interval
limIf ray generator 104 has been opened, fully by after surveyed area, controller 106 could not receive normal end signal, needs hard closing ray generator 104 this moment when tested goods carriage of trucks; During by surveyed area, vehicle is parked in surveyed area when tested goods carriage of trucks, and also need to consider hard closing ray generator 104 this moment, also can be by completing manually; Hence one can see that, and the upper limit T that ray generator 104 is opened into the shut-in time interval is set
limVery necessary.After the test mass data, the time that detected vehicle normally crosses surveyed area mostly in 20s, therefore forces to set interval upper limit T
limBe 25s.
The headstock that highway green channel provided by the present invention detects is dodged control system, for the green channel detection system, utilizes the x radiation x imaging technique enclosed vehicle to be carried out the problem of harmless quick inspection, has designed a headstock and has dodged control system.This control system adopts the mode of operation of fully automatically controlling, the position of sailing vehicle into is reasonably judged, draw the state that vehicles while passing enters surveyed area, just start ray during by principal ray when the compartment, close ray when the compartment crosses principal ray fully, guarantee only the position, compartment to be detected.After ray is opened, if Vehicle Speed is very slow or when being parked in surveyed area, controller can be after ray be opened certain hour the hard closing ray, guarantee security.Whole system can fine judgement detect vehicle at the state of surveyed area, can avoid headstock during detection, only the position, compartment is scanned, and can reduce or avoid the driver is caused unnecessary injury.
The above is only the preferred embodiment of the present invention; described herein is exemplary preferred embodiment of the present invention; and the preferred embodiments of the present invention of having used concrete term description; but this description only is used for the example purpose; those skilled in the art should be noted that disclosed by the invention is only example; and should be appreciated that and to make various changes and variation, and do not break away from the protection domain of claim of the present invention.
Claims (9)
1. highway green test passage vehicle cab avoidance system, it is characterized in that: described pilothouse avoidance system comprises:
First group of sensor node, second group of sensor node and the 3rd group of sensor node, every group of sensor node all is comprised of a pair of light beam, and three pairs of optoelectronic switches are installed on every pair of light beam;
Ray generator and ray detector, ray detector are used for receiving the ray that ray generator sends;
Controller receives the level skip signal of optoelectronic switch in every group of sensor node, draws vehicle in position and the speed of surveyed area, and the position relationship between judgement pilothouse, container and ray generator is controlled the opening and closing of ray generator;
First group of sensor node, second group of sensor node and the 3rd group of sensor node are arranged in order along the direction of the admission passage of vehicle, ray generator and ray detector are arranged between second group of sensor node and the 3rd group of sensor node, and near second group of sensor node.
2. a kind of highway green test passage vehicle cab avoidance system according to claim 1, is characterized in that: three pairs of optoelectronic switches all are installed on every pair of light beam, are followed successively by from top to bottom optoelectronic switch one, optoelectronic switch two and optoelectronic switch three; Be spaced apart 0.3 meter between optoelectronic switch, optoelectronic switch one is 1.7-2 rice apart from the height on ground.
3. a kind of highway green test passage vehicle cab avoidance system according to claim 1 and 2, it is characterized in that: the distance between first group of sensor node and second group of sensor node is 2.5-3 rice, spacing between second group of sensor node and the 3rd group of sensor node is 2.5-3 rice, and the spacing of second group of sensor node and ray generator is 0.4-0.8 rice.
4. a kind of highway green test passage vehicle cab avoidance system according to claim 2, it is characterized in that: optoelectronic switch one is 1.9 meters apart from the height on ground.
5. a kind of highway green test passage vehicle cab avoidance system according to claim 3, it is characterized in that: the distance between first group of sensor node and second group of sensor node is 2.8 meters, spacing between second group of sensor node and the 3rd group of sensor node is 2.7 meters, and the spacing of second group of sensor node and ray generator is 0.5 meter.
6. highway green test passage vehicle cab preventing collision method is characterized in that:
Step 1: vehicle need to enter green channel vehicle detection zone with the speed of a motor vehicle of 5-10 kilometer per hour, when Vehicle Driving Cycle is crossed light beam, all optoelectronic switches on light beam all become off-state from on-state, and sensor node becomes output low level from the output high level; The signal of controller receiving sensor node is judged speed and the position of vehicle in surveyed area;
Step 2: sensor node is three groups, by first group of sensor node and second group of sensor node, vehicle is carried out the information of vehicles pre-service, vehicle is divided into tractor-trailer and non-tractor-trailer, when second group of sensor node of the anterior arrival of tested vehicle cab, if first group of sensor node is in on-state, judge that detected vehicle is tractor-trailer; If first group of sensor node is in off-state, judge that tested vehicle is non-tractor-trailer;
Step 3: if vehicle is tractor-trailer, judge the relative position of vehicle loading front end and second group of sensor node and the relative position of vehicle loading afterbody and second group of sensor node; If detected vehicle is non-tractor-trailer, judge the relative position of vehicle loading front end and the 3rd group of sensor node and the relative position of vehicle loading afterbody and second group of sensor node; The vehicle cab front end is respectively T1 and V1 from time and the average velocity that first group of sensor node drives to second group of sensor node; The time and the average velocity that drive to the 3rd group of sensor node from second group of sensor node are respectively T2 and V2; The vehicle loading afterbody is respectively T3 and V3 from time and the average velocity that first group of sensor node drives to second group of sensor node;
Step 4: if vehicle is tractor-trailer, after the 3rd group of sensor node of the anterior arrival of pilothouse, and continue to wait until when the vehicle loading front end arrives second group of light beam, 0.5/V2 is after second in time-delay, opens ray generator; If detected vehicle is non-tractor-trailer, after the 3rd group of sensor node of the anterior arrival of vehicle cab, directly open ray generator; No matter being tractor-trailer, is also non-tractor-trailer, and after the vehicle loading afterbody arrived second group of sensor node, 0.5/V3 was after second in time-delay, closes ray generator.
7. a kind of highway green test passage vehicle cab preventing collision method according to claim 6, it is characterized in that: if ray generator is opened, after tested vehicle loading passes through surveyed area fully, controller could not receive normal end signal, hard closing this moment ray generator.
8. according to claim 6 or 7 described a kind of highway green test passage vehicle cab preventing collision methods, it is characterized in that: when tested vehicle loading during by surveyed area, vehicle is parked in surveyed area, if need the hard closing ray generator, and can be by completing manually.
9. one of according to claim 6-8 described a kind of highway green test passage vehicle cab preventing collision methods is characterized in that: ray generator be opened into the shut-in time interval on be limited to 25 seconds.
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