CN109532753A - A kind of VATS Vehicle Anti-Theft System based on car networking - Google Patents
A kind of VATS Vehicle Anti-Theft System based on car networking Download PDFInfo
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- CN109532753A CN109532753A CN201811296032.5A CN201811296032A CN109532753A CN 109532753 A CN109532753 A CN 109532753A CN 201811296032 A CN201811296032 A CN 201811296032A CN 109532753 A CN109532753 A CN 109532753A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
- B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/30—Detection related to theft or to other events relevant to anti-theft systems
- B60R25/33—Detection related to theft or to other events relevant to anti-theft systems of global position, e.g. by providing GPS coordinates
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Lock And Its Accessories (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a kind of VATS Vehicle Anti-Theft Systems based on car networking, the VATS Vehicle Anti-Theft System includes personal mobile terminal, remote-control unlocking circuit, the first telecommunication circuit and vehicle anti-theft circuit, personal mobile terminal and remote-control unlocking circuit connection, remote-control unlocking circuit, the first telecommunication circuit and vehicle anti-theft circuit are sequentially connected electrically, remote-control unlocking circuit, the first telecommunication circuit and vehicle anti-theft circuit pass through storage battery power supply, remote-control unlocking circuit is used to receive the remote control lock signal of personal mobile terminal, and the first telecommunication circuit is for the communication between remote-control unlocking circuit and vehicle anti-theft circuit.The invention enhances the anti-theft performance of vehicle, enhances the safety of automobile by setting remote-controlled lock and the setting of key lock multi-lock.
Description
Technical field
The present invention relates to anti-theft field of vehicles, specifically a kind of VATS Vehicle Anti-Theft System based on car networking.
Background technique
With the development of economy, the quantity of automobile is increasing, but the number that automobile is stolen is also with the development of science and technology
Increasing, current automobile also mostly uses greatly the development of control engine ignition to carry out antitheft other than controlling door lock, this anti-
Robber's mode is too simple, and it is impossible to meet the needs that car owner increases；It is existing in addition to current antitheft mode is too simple
Technology can not make car owner timely and effectively recognize the position situation of vehicle.
Therefore, applicant proposes a kind of VATS Vehicle Anti-Theft System based on car networking.
Summary of the invention
The purpose of the present invention is to provide a kind of VATS Vehicle Anti-Theft Systems based on car networking, to solve in the prior art ask
Topic.
To achieve the above object, the invention provides the following technical scheme:
A kind of VATS Vehicle Anti-Theft System based on car networking, the VATS Vehicle Anti-Theft System include personal mobile terminal, remote-control unlocking electricity
Road, the first telecommunication circuit and vehicle anti-theft circuit, personal mobile terminal and remote-control unlocking circuit connection, remote-control unlocking circuit, first
Telecommunication circuit and vehicle anti-theft circuit are sequentially connected electrically, and remote-control unlocking circuit, the first telecommunication circuit and vehicle anti-theft circuit pass through
Storage battery power supply, remote-control unlocking circuit are used to receive the remote control lock signal of personal mobile terminal, and the first telecommunication circuit is opened for being remotely controlled
Communication between lock circuit and vehicle anti-theft circuit.
In the above-mentioned technical solutions, when personal mobile terminal passes through remote-control unlocking circuit car locking, remote-control unlocking circuit is received
Car locking order sends car locking order to vehicle anti-theft circuit by the first telecommunication circuit, and vehicle anti-theft circuit disconnects engine
Ignition controller and battery between connection so that automobile can not light a fire, to realize anti-theft function；Work as personal mobile terminal
When being unlocked by remote-control unlocking circuit, remote-control unlocking circuit receives order of unlocking, and the order that will unlock is passed by the first telecommunication circuit
Vehicle anti-theft circuit is given, vehicle anti-theft circuit connects the connection between the ignition controller and battery of engine, waits vapour
Vehicle igniting；Here personal mobile terminal may be remote-control key.
Preferably, vehicle anti-theft circuit includes control circuit and relay circuit, the input terminal of control circuit with
The connection of first telecommunication circuit, the output end of control circuit are connect with relay circuit, and relay circuit includes relay K, NPN type
Triode Q and anti-theft module, the base stage of NPN type triode Q and the output end of control circuit connect, the transmitting of NPN type triode Q
Pole ground connection, the collector of NPN type triode Q are connect with one end of relay K coil, the other end of relay coil K and electric power storage
Pond connection, the stationary contact of relay are connect with battery, and the movable contact of relay is connect with anti-theft module.
In the above-mentioned technical solutions, when control circuit receives the car locking order of the first telecommunication circuit transmission, by signal
It is transferred to relay circuit, relay disconnects, and anti-theft module power-off, igniter can not carry out igniting starting；When control circuit connects
When receiving the order of the unlocking of the first telecommunication circuit transmission, relay circuit, relay closure, anti-theft module are transmitted a signal to
It is powered, igniter waits for igniting starting.
Preferably, anti-theft module includes igniter control unit, positioning unit and the second communication unit, igniter
Control unit for control igniter whether starting ignition, positioning unit positions this using the location algorithm based on collaboration communication
Position where vehicle, the second communication unit are used to the position where vehicle being sent to personal mobile terminal.
In the above-mentioned technical solutions, when control circuit receives the order of unlocking, relay closure, anti-theft module is led to
Electricity, igniter wait for igniting starting, and after ignition switch closure, igniter fire starting, positioning units are calculated according to positioning
Position where vehicle is sent to personal mobile terminal by the second communication unit by method, is realized the monitoring to vehicle location, is mentioned
The high safety of vehicle.
Preferably, the location algorithm based on collaboration communication the following steps are included:
1) unknown node initiates Location Request, and unknown node sends measuring signal intensity (RSSI) to known node, wherein
Unknown node is the position positioned where vehicle, it is known that node is radio node, sets a variable c=0.
2) the RSSI intensity value that known node is sent according to unknown node calculate between known node and unknown node away from
From value S, and unknown node is returned to, if the normal threshold value of communication radius is S0, S is less than S0Known node number be B,
If 1. B is gone to less than 3, if B is equal to 3, go to 2., if B is greater than 3, goes to 3.；
1. utilizing collaboration communication, itself coordinate information is obtained after surrounding other unknown nodes positioning, is assisted as known node
It is positioned as unknown node, then calculates the coordinate position of unknown node, c=c+ with improved trilateration and confidence algorithm
1, it goes to 3)；
2. calculating the coordinate position of unknown node using existing trilateration and centroid algorithm, c=c+1 is gone to
3)；
3. being in communication with each other first with known node, determines and constitute multiple triangles between the known node comprising unknown node
Shape, with improved trilateration calculate unknown node coordinate position, further according to triangle area size to unknown node
The weights influence of position is weighted and averaged processing to coordinate position, the final coordinate position for positioning unknown node, c=c+1,
It goes to 3).
3) d is constant, if c ≠ d, turns 2), if c=d, turns 4).
4) executing step 2) every time and obtaining the coordinate position of unknown node is respectively (x1, y1)、(x2, y2)、...、(xd, yd), it takes
The average of these coordinate positions, the coordinate position for obtaining unknown node are Algorithm terminates.
In the above-mentioned technical solutions, by the algorithm based on collaboration communication, situation that can not only be bad in wireless conditions
Under, it is able to carry out vehicle location, additionally it is possible in the case where wireless conditions are good, improve the positioning accuracy of vehicle；In the algorithm, lead to
It crosses and step 2) is performed a plurality of times, the coordinate position obtained every time is added up and is averaging processing, it is therefore prevented that because of accidental error band
The influence come, so that the position of vehicle coordinate is more accurate.
Preferably, improved trilateration and centroid algorithm, the coordinate of three known nodes are K (xk, yk)、M(xm,
ym) and N (xn, yn), it is known that node K (xk, yk)、M(xm, ym) and N (xn, yn) to the distance of unknown node be respectively Sk、Sm、Sn, respectively with
K(xk, yk)、M(xm, ym)、N(xn, yn) it is the center of circle, it is Sk、Sm、SnRadius work is justified, and three circles intersect two-by-two, with intersection point K (x'k, y'k)、M
(x'm, y'm)、N(x'n, y'n) it is that a triangle is made on vertex, take the mass center of the triangle as the coordinate of unknown node, according to three
The calculation method of angular mass center, the coordinate of unknown node
In the above-mentioned technical solutions, it by improved trilateration and centroid algorithm, improves and calculates unknown node seat
Target accuracy.
Preferably, the calculating of distance value S uses formula (1):
Take reference distance S0=1m is shadowing model using the theoretical model that wireless signal transmits in space:
RSSI=- (A+10nlgS) (1)
Wherein A indicates that the absolute value that average ability is received at range transmission node 1m, unit dbm, n are signal transmission
Constant, n is related with transmission environment, and S is the distance between receiving node and transmitting node.
Preferably, the connection between personal mobile terminal and remote-control unlocking circuit is to be wirelessly connected.
Preferably, ignition switch is provided between the connection of the stationary contact and battery of relay.
In the above-mentioned technical solutions, ignition switch can be key；Vehicle igniting starting is controlled, remote-controlled lock is not only needed
Unlock, it is also necessary to which key is inserted into closed circuit, and multi-lock setting enhances the safety of vehicle, prevents vehicle stolen.
Preferably, control circuit is single-chip computer and its peripheral circuit.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is enhanced the anti-theft performance of vehicle, is enhanced by setting remote-controlled lock and the setting of key lock multi-lock
The safety of automobile.
2, the present invention can not only be able to carry out vehicle location, additionally it is possible to wireless in the case where wireless conditions are bad
In the case that situation is good, the positioning accuracy of vehicle is improved.
Detailed description of the invention
Fig. 1 is a kind of electrical block diagram of the VATS Vehicle Anti-Theft System based on car networking of the present invention；
Fig. 2 is that positioning is calculated when a kind of known node number of the VATS Vehicle Anti-Theft System based on car networking of the present invention is greater than three
The schematic diagram of method；
Fig. 3 is the schematic diagram of trilateration ideally；
Fig. 4 is the schematic diagram of the trilateration under actual conditions.
In figure: 1- remote-control unlocking circuit, the first telecommunication circuit of 2-, 3- control circuit, 4- ignition control unit, 5- positioning are single
Member, the second communication unit of 6-, 7- anti-theft module.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the embodiment of the present invention, as shown in Figure 1, a kind of VATS Vehicle Anti-Theft System based on car networking, the VATS Vehicle Anti-Theft System
Including personal mobile terminal, remote-control unlocking circuit 1, the first telecommunication circuit 2 and vehicle anti-theft circuit, personal mobile terminal and remote-control unlocking
Circuit 1 connects, and remote-control unlocking circuit 1, the first telecommunication circuit 2 and vehicle anti-theft circuit are sequentially connected electrically, remote-control unlocking circuit 1,
First telecommunication circuit 2 and vehicle anti-theft circuit are by storage battery power supply, and remote-control unlocking circuit 1 is for receiving the distant of personal mobile terminal
Lock signal is controlled, the first telecommunication circuit 2 is for the communication between remote-control unlocking circuit 1 and vehicle anti-theft circuit.
In the above-mentioned technical solutions, when personal mobile terminal passes through 1 car locking of remote-control unlocking circuit, remote-control unlocking circuit 1 is connect
Car locking order is received, car locking order is sent to vehicle anti-theft circuit by the first telecommunication circuit 2, the disconnection of vehicle anti-theft circuit is started
Connection between the ignition controller and battery of machine, so that automobile can not light a fire, to realize anti-theft function；When individual is mobile
When end is unlocked by remote-control unlocking circuit 1, remote-control unlocking circuit 1 receives order of unlocking, and the order that will unlock passes through the first communication electricity
Road 2 sends vehicle anti-theft circuit to, and vehicle anti-theft circuit connects the connection between the ignition controller and battery of engine, etc.
To automotive ignition；Here personal mobile terminal may be remote-control key.
Vehicle anti-theft circuit includes control circuit 3 and relay circuit, the input terminal of control circuit 3 and the first telecommunication circuit
2 connections, the output end of control circuit 3 connect with relay circuit, relay circuit include relay K, NPN type triode Q and
The base stage of anti-theft module 7, NPN type triode Q is connect with the output end of control circuit 3, the emitter ground connection of NPN type triode Q,
The collector of NPN type triode Q is connect with one end of relay K coil, and the other end of relay coil K is connect with battery,
The stationary contact of relay is connect with battery, and the movable contact of relay is connect with anti-theft module 7.
In the above-mentioned technical solutions, when control circuit 3 receives the car locking order of the first telecommunication circuit 2 transmission, will believe
It number is transferred to relay circuit, relay disconnects, and anti-theft module 7 powers off, and igniter can not carry out igniting starting；Work as control circuit
3 when receiving the order of the unlocking of the first telecommunication circuit 2 transmission, transmits a signal to relay circuit, relay closure is antitheft
Module 7 is powered, and igniter waits for igniting starting.
Anti-theft module 7 includes igniter control unit 4, positioning unit 5 and the second communication unit 6, igniter control unit 4
For control igniter whether starting ignition, positioning unit 5 positions the vehicle institute using the location algorithm based on collaboration communication
Position, the second communication unit 6 is used to the position where vehicle being sent to personal mobile terminal.
In the above-mentioned technical solutions, when control circuit 3 receives the order of unlocking, relay closure, anti-theft module 7 is led to
Electricity, igniter wait for igniting starting, and after ignition switch closure, igniter fire starting, positioning units are calculated according to positioning
Position where vehicle is sent to personal mobile terminal by the second communication unit 6 by method, is realized the monitoring to vehicle location, is mentioned
The high safety of vehicle.
Location algorithm based on collaboration communication the following steps are included:
1) unknown node initiates Location Request, and unknown node sends measuring signal intensity (RSSI) to known node, wherein
Unknown node is the position positioned where vehicle, it is known that node is radio node, sets a variable c=0.
2) the RSSI intensity value that known node is sent according to unknown node calculate between known node and unknown node away from
From value S, and unknown node is returned to, if the normal threshold value of communication radius is S0, S is less than S0Known node number be B,
If 1. B is gone to less than 3, if B is equal to 3, go to 2., if B is greater than 3, goes to 3.；
1. utilizing collaboration communication, itself coordinate information is obtained after surrounding other unknown nodes positioning, is assisted as known node
It is positioned as unknown node, then calculates the coordinate position of unknown node, c=c+ with improved trilateration and confidence algorithm
1, it goes to 3)；
2. calculating the coordinate position of unknown node using existing trilateration and centroid algorithm, c=c+1 is gone to
3)；
3. being in communication with each other first with known node, determines and constitute multiple triangles between the known node comprising unknown node
Shape, with improved trilateration calculate unknown node coordinate position, further according to triangle area size to unknown node
The weights influence of position is weighted and averaged processing to coordinate position, the final coordinate position for positioning unknown node, c=c+1,
It goes to 3).
3) d is constant, if c ≠ d, turns 2), if c=d, turns 4).
4) executing step 2) every time and obtaining the coordinate position of unknown node is respectively (x1, y1)、(x2, y2)、...、(xd,
yd), the average of these coordinate positions is taken, the coordinate position for obtaining unknown node is Algorithm terminates.
In the above-mentioned technical solutions, by the algorithm based on collaboration communication, situation that can not only be bad in wireless conditions
Under, it is able to carry out vehicle location, additionally it is possible in the case where wireless conditions are good, improve the positioning accuracy of vehicle；In the algorithm, lead to
It crosses and step 2) is performed a plurality of times, the coordinate position obtained every time is added up and is averaging processing, it is therefore prevented that because of accidental error band
The influence come, so that the position of vehicle coordinate is more accurate, for example, it is assumed that d=3, then step 2) Yao Zhihang 3 times, every time
Obtained coordinate position is respectively (x1, y1)、(x2, y2)、(x3, y3), then the coordinate position of unknown node is
When that can constitute multiple triangles between the known node comprising unknown node, i.e., known node number is greater than three
When a, the position specific embodiment of coordinates computed is as shown in Fig. 2, set unknown node as O, it is known that node E, F, G and H, so
Judge that unknown node O is in the triangle of the composition of which known node again afterwards, it is evident that unknown node O is in triangle
In EFG and triangle FGH the two triangles, with trilateration and center algorithm is set in the two triangles, obtain coordinate
OEFGWith coordinate OFGH, further according to the size of triangle EFG and triangle FGH to progress OEFG、OEFGWeighting is averaged, finally
Obtain the coordinate of unknown node O.
Improved trilateration and centroid algorithm, the coordinate of three known nodes are K (xk, yk)、M(xm, ym) and N (xn,
yn), it is known that node K (xk, yk)、M(xm, ym) and N (xn, yn) to the distance of unknown node be respectively Sk、Sm、Sn, respectively with K (xk,
yk)、M(xm, ym)、N(xn, yn) it is the center of circle, it is Sk、Sm、SnRadius work is justified, and three circles intersect two-by-two, with intersection point K (x'k, y'k)、M
(x'm, y'm)、N(x'n, y'n) it is that a triangle is made on vertex, take the mass center of the triangle as the coordinate of unknown node, according to
The calculation method of the mass center of triangle, the coordinate of unknown node
Under the conditions of Utopian, as shown in figure 3, can be more accurately worth using trilateration, but it is practical
In use process, as shown in figure 4, signal has path loss in communication process, so using trilateration in the prior art
The value of method and actual value deviation are larger, therefore we use improved trilateration and centroid algorithm, improve calculating not
Know the accuracy of node coordinate.
The calculating of distance value S uses formula (1):
Take reference distance S0=1m is shadowing model using the theoretical model that wireless signal transmits in space:
RSSI=- (A+10nlgS) (1)
Wherein A indicates that the absolute value that average ability is received at range transmission node 1m, unit dbm, n are signal transmission
Constant, n is related with transmission environment, and S is the distance between receiving node and transmitting node.
Connection between personal mobile terminal and remote-control unlocking circuit 1 is to be wirelessly connected.
Ignition switch is provided between the connection of the stationary contact and battery of relay.
In the above-mentioned technical solutions, ignition switch can be key；Vehicle igniting starting is controlled, remote-controlled lock is not only needed
Unlock, it is also necessary to which key is inserted into closed circuit, and multi-lock setting enhances the safety of vehicle, prevents vehicle stolen.
Control circuit 3 is single-chip computer and its peripheral circuit.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (9)
1. a kind of VATS Vehicle Anti-Theft System based on car networking, it is characterised in that: the VATS Vehicle Anti-Theft System include personal mobile terminal,
Remote-control unlocking circuit (1), the first telecommunication circuit (2) and vehicle anti-theft circuit, the personal mobile terminal and remote-control unlocking circuit (1)
Connection, the remote-control unlocking circuit (1), the first telecommunication circuit (2) and vehicle anti-theft circuit are sequentially connected electrically, the remote-control unlocking
Circuit (1), the first telecommunication circuit (2) and vehicle anti-theft circuit are by storage battery power supply, and the remote-control unlocking circuit (1) is for connecing
The remote control lock signal of personal mobile terminal is received, first telecommunication circuit (2) is used for remote-control unlocking circuit (1) and vehicle anti-theft circuit
Between communication.
2. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 1, it is characterised in that: the vehicle anti-theft
Circuit includes control circuit (3) and relay circuit, and the input terminal of the control circuit (3) is connect with the first telecommunication circuit (2),
The output end of control circuit (3) is connect with relay circuit, the relay circuit include relay K, NPN type triode Q and
The base stage of anti-theft module (7), the NPN type triode Q is connect with the output end of control circuit (3), the hair of NPN type triode Q
The collector of emitter grounding, NPN type triode Q is connect with one end of relay K coil, the other end of the relay coil K
It is connect with battery, the stationary contact of the relay is connect with battery, and the movable contact of the relay and anti-theft module (7) are even
It connects.
3. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 2, it is characterised in that: the anti-theft module
It (7) include igniter control unit (4), positioning unit (5) and the second communication unit (6), the igniter control unit (4) is used
In control igniter whether starting ignition, the positioning unit (5) positions the vehicle using the location algorithm based on collaboration communication
Position where, second communication unit (6) are used to the position where vehicle being sent to personal mobile terminal.
4. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 3, it is characterised in that: described based on cooperation
The location algorithm of communication the following steps are included:
1) unknown node initiates Location Request, and unknown node sends measuring signal intensity (RSSI) to known node, wherein unknown
Node is the position positioned where vehicle, it is known that node is radio node, sets a record variable c=0.
2) known node calculates the distance between known node and unknown node value according to the RSSI intensity value that unknown node is sent
S, and unknown node is returned to, if the normal threshold value of communication radius is S0, S is less than S0Known node number be B, if B
It less than 3, goes to 1., if B is equal to 3, goes to 2., if B is greater than 3, go to 3.；
1. utilizing collaboration communication, itself coordinate information is obtained after surrounding other unknown nodes positioning, not as known node cooperation
Know that node is positioned, then calculate the coordinate position of unknown node with improved trilateration and confidence algorithm, c=c+1 turns
To 3)；
2. calculating the coordinate position of unknown node using existing trilateration and centroid algorithm, 3) c=c+1 is gone to；
3. being in communication with each other first with known node, determines and constitute multiple triangles between the known node comprising unknown node, use
Improved trilateration calculates the coordinate position of unknown node, further according to triangle area size to unknown node position
Weights influence is weighted and averaged processing to coordinate position, 3) the final coordinate position for positioning unknown node, c=c+1 is gone to.
3) d is constant, if c ≠ d, turns 2), if c=d, turns 4).
4) executing step 2) every time and obtaining the coordinate position of unknown node is respectively (x1, y1)、(x2, y2)、...、(xd, yd), it takes
The average of these coordinate positions, the coordinate position for obtaining unknown node are Algorithm terminates.
5. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 4, it is characterised in that: described improved three
Side mensuration and centroid algorithm, the coordinate of three known nodes are K (xk, yk)、M(xm, ym) and N (xn, yn), it is known that node K
(xk, yk)、M(xm, ym) and N (xn, yn) to the distance of unknown node be respectively Sk、Sm、Sn, respectively with K (xk, yk)、M(xm, ym)、
N(xn, yn) it is the center of circle, it is Sk、Sm、SnRadius work is justified, and three circles intersect two-by-two, with intersection point K (x'k, y'k)、M(x'm, y'm)、N
(x'n, y'n) it is that a triangle is made on vertex, take the mass center of the triangle as the coordinate of unknown node, according to the matter of triangle
The calculation method of the heart, the coordinate of unknown node
6. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 1, it is characterised in that: the distance value S
Calculating use formula (1):
Take reference distance S0=1m is shadowing model using the theoretical model that wireless signal transmits in space:
RSSI=- (E+10nlgS) (1)
Wherein E indicates the absolute value that average ability is received at unknown node 1m, and unit dbm, n are and transmission environment phase
The signal transmission of pass, S are the distance between known node and unknown node.
7. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 6, it is characterised in that: described personal mobile
Connection between end and remote-control unlocking circuit (1) is to be wirelessly connected.
8. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 7, it is characterised in that: the relay
Ignition switch is provided between stationary contact and the connection of battery.
9. a kind of VATS Vehicle Anti-Theft System based on car networking according to claim 8, it is characterised in that: the control circuit
It (3) is single-chip computer and its peripheral circuit.
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| CN201811296032.5A CN109532753A (en) | 2018-11-01 | 2018-11-01 | A kind of VATS Vehicle Anti-Theft System based on car networking |
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| CN201811296032.5A CN109532753A (en) | 2018-11-01 | 2018-11-01 | A kind of VATS Vehicle Anti-Theft System based on car networking |
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