CN104240530A - Bus offline detection method - Google Patents

Abstract

The invention discloses a bus offline detection method which comprises the steps of 1, setting a plurality of special coordinate points on a planned bus route at equal intervals, wherein the distance between every two special coordinate points is d; 2, setting a square parallel to longitude and latitude is arranged on each special coordinate point; 3, downloading all special coordinate points and marking information from a vehicle-mounted controller and special coordinate points (x0, y0); 4, detecting coordinate information of a vehicle-mounted GPS through the vehicle-mounted controller; 5, judging the special coordinate point close to a current station in priority, and judging the next special coordinate point if the special coordinate point is not matched with the current station; 6, determining that a bus is online when the coordinate information of the vehicle-mounted GPS drops in the square of the special coordinate point; otherwise, determining that the bus is offline. The bus offline detection method is simple, and the operation amount is reduced. The bus can be detected directly by the bus offline detection method with no need for loading the coordinate information to a background, and therefore, dependence on the background is reduced.

Description

Public transit vehicle off-line checking method

Technical field

The present invention relates to mass-transit vehicle schedules and vehicle-mounted machine product scope, especially relate to a kind of public transit vehicle off-line checking method.

Background technology

Because public transit vehicle has the fixing characteristic of working line, therefore in bus dispatching, whether according to the operation of planning circuit, examination Bus driver and Vehicular behavior important indicator are become to vehicle operating track.Vehicle off-line refers to it is that vehicle and circuit vertical range continue more than 10 seconds when being greater than 200m.Domestic is at present all that vehicle coordinate information is uploaded to backstage to the judgement of vehicle off-line, and backstage is uploaded coordinate information according to vehicle and carried out calculating and judging, result of calculation is handed down to vehicle monitoring terminal again.Above method has following shortcoming: 1) coordinate information is uploaded to backstage by vehicle, there is time delay situation, can not reflect Vehicular behavior in time, can not remind driver in time; 2) coordinate information is uploaded to backstage by equipment end, and increase hind computation amount and complexity, when server connection device is more, higher to server requirement, extensibility is not strong; 3) result of calculation is handed down to equipment by server end again, there is time delay and lag situation.

Summary of the invention

In view of this, the object of this invention is to provide a kind of public transit vehicle off-line checking method, the method efficiently solves produced problem in prior art, method is simple, decreases operand, directly can detect on public transit vehicle, without the need to being uploaded to backstage again, reduce the dependence to backstage.

For achieving the above object, the present invention by the following technical solutions:

A kind of public transit vehicle off-line checking method, comprises the steps:

Step 1, the public bus network of planning arranges multiple equidistant special coordinates point, and the distance of two special coordinates points is d;

Step 2, each special coordinates point is established the square that parallel with longitude and latitude;

Step 3, step 3, Vehicle Controller is downloaded each special coordinates point and beacon information, and downloads special coordinates point ;

Step 4, Vehicle Controller detects the coordinate information of vehicle GPS;

Step 5, preferentially judging the special coordinates point near current site, if do not mated, then judging next special coordinates point;

Step 6, when in the square that vehicle GPS coordinate information falls into special coordinates point, then thinks online; Otherwise think vehicle off-line.

As preferably, the described foursquare length of side is 300 m.

The invention has the beneficial effects as follows:

The present invention is while planning public bus network, public bus network sets some equidistant fixing special coordinates points, each particular point does a square parallel with longitude and latitude, method is simple, do not need two coordinate points to be converted into actual range, decrease operand, consider the blind area situation that various circuit easily occurs, error be down to minimum, testing result is accurate.Directly can detecting on public transit vehicle, without the need to being uploaded to backstage again, reducing the dependence to backstage, also reduce background server computing load, for the dilatation of post-service device is provided convenience simultaneously.

Accompanying drawing explanation

Fig. 1 is method flow diagram of the present invention;

Fig. 2 is the schematic diagram of special coordinates of the present invention some longitude and latitude side-play amount;

Fig. 3 is that off-line of the present invention judges schematic diagram;

Fig. 4 is the public bus network of the present invention special coordinates point parallel with latitude and foursquare schematic diagram;

Fig. 5 is the public bus network of the present invention special coordinates point parallel with longitude and foursquare schematic diagram;

Fig. 6 is all uneven special coordinates point of public bus network of the present invention and longitude and latitude and foursquare schematic diagram;

Fig. 7 is the error analysis schematic diagram of public bus network of the present invention.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

As shown in Figure 1, of the present inventionly to comprise the following steps:

Step 1, the public bus network of planning arranges multiple equidistant special coordinates point, and the distance of two special coordinates points is d;

Step 2, each special coordinates point is established the square that parallel with longitude and latitude;

Step 3, Vehicle Controller is downloaded each special coordinates point and beacon information, and downloads special coordinates point ;

Step 4, Vehicle Controller detects the coordinate information (x, y) of vehicle GPS;

Step 5, preferentially judging the special coordinates point near current site, if do not mated, then judging next special coordinates point;

Step 6, when in the square that vehicle GPS coordinate information falls into special coordinates point, then thinks online; Otherwise think vehicle off-line.When < x and during < y, think that vehicle is online; Otherwise think vehicle off-line.

While planning public bus network, public bus network sets some equidistant fixing special coordinates points; Because public bus network is all finite length, generally can not more than 50km, such distance is very little concerning the earth, therefore, can assert on a circuit, for each special coordinates point, certain angle offsets fixed range, offset 200m relative to each special coordinates point, its longitude and latitude side-play amount x and y can regard as identical, x and y can be regarded as a fixing constant and process.As shown in Figure 2, be θ for angle, offset distance is the position A of d, and it is (x, y) relative to the longitude and latitude side-play amount of particular point O.

As shown in Figure 3, a square parallel with longitude and latitude can be done on each special coordinates point, when the gps coordinate information of vehicle is in square, as the vehicle 1 in diagram, then think online, otherwise think vehicle off-line, as the vehicle 2 in diagram.Algorithm of the present invention is simple, does not need two coordinate points to be converted into actual range, quadratic sum extracting operation is converted into plus and minus calculation, greatly reduces system burden.

As shown in Figure 2 and Figure 3, represent the actual longitude and latitude of vehicle, represent the longitude and latitude of a special coordinates point, (x, y) represents to depart from and departs from longitude and latitude corresponding to special coordinates point 200m.Algorithm of the present invention, only need calculate actual shifts longitude and latitude with if, < x and when < y two conditions meet simultaneously, then represent that bus is online; Otherwise, represent bus off-line.

As shown in Figure 4, Figure 5, public bus network is parallel with latitude respectively, parallel with longitude, judge public transit vehicle whether off-line time fairly simple, directly judge Current vehicle gps data whether in square.As shown in Figure 6, for oblique circuit, there is blind zone problem, the dash area shown in Fig. 7 represents blind area.When draft angle is 45 °, blind area is maximum, therefore, reduces blind zone problem in selective analysis 45 ° of situations.We are through experiment and calculate, when the square length of side is , when unique point distance is 200m, blind area is less, and the situation online vehicle being mistaken for off-line vehicle can be avoided to occur; And good judgement can be made to off-line vehicle.

Suppose this circuit 50km, special website distance is 200m, then in vehicle-mounted machine, need download 251 special coordinates points, need in addition to download each special coordinates point and special website beacon information, for recording special website number and special website label between two websites, facilitate the later stage to calculate.Detect vehicle actual coordinate (x, y) in real time when vehicle operating, when needs judge that whether vehicle is online, the above-mentioned formula of preferential utilization judges special coordinates point near current site.If do not mated, then judge next special coordinates point, the like.Under worst case, can compare 250 times, for single-chip microcomputer, 250 times plus and minus calculation can complete very easily.

What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.

Claims (2)

1. a public transit vehicle off-line checking method, is characterized in that: comprise the steps:

Step 1, the public bus network of planning arranges multiple equidistant special coordinates point, and the distance of two special coordinates points is d;

Step 2, each special coordinates point is established the square that parallel with longitude and latitude;

Step 3, Vehicle Controller is downloaded each special coordinates point and beacon information, and downloads special coordinates point ;

Step 4, Vehicle Controller detects the coordinate information of vehicle GPS;

Step 5, preferentially judging the special coordinates point near current site, if do not mated, then judging next special coordinates point;

Step 6, when in the square that vehicle GPS coordinate information falls into special coordinates point, then thinks online; Otherwise think vehicle off-line.

2. a kind of public transit vehicle off-line checking method according to claim 1, is characterized in that: the described foursquare length of side is 300 m.