CN105427623B - The method and device of speed and place length calculation method are detected using radio frequency - Google Patents
The method and device of speed and place length calculation method are detected using radio frequency Download PDFInfo
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- CN105427623B CN105427623B CN201410386181.6A CN201410386181A CN105427623B CN 105427623 B CN105427623 B CN 105427623B CN 201410386181 A CN201410386181 A CN 201410386181A CN 105427623 B CN105427623 B CN 105427623B
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Abstract
The present invention provides a kind of method and device that speed is detected using radio frequency, wherein a radio-frequency antenna has the vehicle of RF tag in detection one in a detection detection zone；One radio-frequency readers read the number of the RF tag via the radio-frequency antenna；When the radio-frequency antenna detects that the vehicle enters the detection zone, one host generates corresponding time TA, when the radio-frequency antenna detects that the vehicle leaves the detection zone, the host generates corresponding time TB, when the radio-frequency readers read the number of the RF tag via the radio-frequency antenna, the host finds out corresponding place length L by the number, then calculates the speed V=L/ (TB TA) of the vehicle.Present invention simultaneously provides a kind of computational methods of place length.
Description
Technical field
The present invention relates to a kind of the method and device of speed and place length calculation method are detected using radio frequency.
Background technology
Traffic competent authority needs to monitor the speed of vehicle in strategic road in real time, to carry out necessary management and control measures.Mesh
The equipment of preceding detection speed is nothing more than infrared detection mode or radar microwave detection mode is used, although effect is pretty good,
The unit price of equipment is higher, can not spread to every road and install comprehensively.
Invention content
In view of disadvantages mentioned above of the existing technology, present invention offer is a kind of to detect the method for speed and dress using radio frequency
It puts, each track can set (at least) radio-frequency antenna, you can accurately detect car speed, while cost is much smaller than
Conventional red outside line detection mode or radar microwave detection mode.
The present invention's is included the following steps using radio frequency to detect the method for speed：
There is the vehicle of RF tag with radio-frequency antenna detection one；The vehicle is obtained to detect into the radio-frequency antenna
The time TA in region；Read the number of the RF tag；Corresponding place length L is found out by the number；Obtain the vehicle
Leave the time TB of the radio-frequency antenna detection zone；Calculate the speed V=L/ (TB-TA) of the vehicle.
Wherein, the place length L is type and the RF tag according to the vehicle on the vehicle
Position determine.
The present invention's is included using radio frequency to detect the device of speed：
One radio-frequency antenna, a radio-frequency readers and a host.The radio-frequency antenna is in one tool of detection in a detection zone
There is the vehicle of RF tag.Radio-frequency readers are electrically connected at the radio-frequency antenna, are read via the radio-frequency antenna described
The number of RF tag.The host is electrically connected at the radio-frequency readers, when the radio-frequency antenna detects the vehicle
During into the detection zone, the host generates corresponding time TA, when the radio-frequency antenna detects that the vehicle leaves
During the detection zone, the host generates corresponding time TB, when the radio-frequency readers are read via the radio-frequency antenna
When taking the number of the RF tag, the host finds out corresponding place length L by the number, then calculates the vehicle
Speed V=L/ (TB-TA).
Wherein, the host includes：One Database Unit is stored with the number of the RF tag and its corresponding radio frequency
Place length corresponding to label setting type and RF tag setting type.
Present invention simultaneously provides a kind of place length calculation methods, and the method includes the following steps：
There is the vehicle of RF tag with radio-frequency antenna detection one；The vehicle is obtained to detect into the radio-frequency antenna
The time TA in region；Read the number of the RF tag；Obtain the vehicle leave the radio-frequency antenna detection zone when
Between TB；The speed V of the vehicle is detected with a velocity sensor；Calculate the place length L=V (TB-TA) of the corresponding number.
Wherein, the velocity sensor is in the speed V of the detection vehicle in a time interval [TC, TD], when described
When time interval [TC, TD] detects time interval [TA, TB] at least part of coincidence of the vehicle with the radio-frequency antenna,
Just calculate the place length L=V (TB-TA) of the corresponding number.
Place length calculation method of the present invention can further comprise the following steps：
Obtain the place length of multiple same RF tag setting types；Calculate the place of these RF tags setting type
The average value of length.
Wherein, the RF tag setting type is the position point according to the type and RF tag of vehicle on vehicle
Class.
Wherein, the velocity sensor utilizes the speed V of vehicle described in infrared detection.
Wherein, the velocity sensor detects the speed V of the vehicle using radar microwave.
The beneficial effects of the present invention are：Vehicle speed can be accurately detected using the method and device of radio frequency detection speed
Degree, while cost is much smaller than conventional red outside line detection mode or radar microwave detection mode.
Description of the drawings
Fig. 1 is the schematic diagram that detection speed is detected using radio frequency for illustrating the present invention.
Fig. 2 is the structure chart of the device of the place length calculation method based on the present invention.
The flow chart of Fig. 3 place length calculation methods according to the present invention.
Fig. 4 is the structure chart according to the present invention that the device of speed is detected using radio frequency.
Fig. 5 is the flow chart according to the present invention that speed method is detected using radio frequency.
Reference numeral
1~road
3~vehicle
4~stent
5~velocity sensor
20~detection zone
21~radio-frequency antenna
22~radio-frequency readers
23~host
231~Database Unit
A~region
B~region
L~place length
S3100, S3200, S3300, S3400, S3500, S3600, S3700, S3800~step
S5100, S5200, S5300, S5400, S5500, S5600, S5700~step
Specific embodiment
The data guard method of the embodiment of the present invention and device are made in the following with reference to the drawings and specific embodiments further
Detailed description, but it is not as a limitation of the invention.
As shown in the figure, stent 4, across in the top of road 1, radio-frequency antenna 21 is mounted on stent 4, is had for detecting
The vehicle 3 of RF tag (not shown).Each track sets radio-frequency antenna 21 (but the branched radio-frequency antenna of setting also can),
When vehicle 3 enter radio-frequency antenna 21 detection zone 20 in, will be detected by radio-frequency antenna 21.
Assuming that the place length that radio-frequency antenna 21 corresponds to the vehicle 3 is L, the entrance of vehicle 3 detection zone 20 (or enter area
Domain A) time TA, vehicle 3 leaves the time TB of detection zone 20 (or entering region B), then the speed V of vehicle 3 is：
V=L/ (TB-TA) (1)
Wherein position of the type and RF tag of place length L and vehicle on vehicle is all related.For example, vehicle
Type can be divided into minibus, bus/lorry, trailer three classes, and the position of RF tag can be divided into vehicle lamp type, vehicle window type two
Class, therefore place length L can be divided into 3 × 2=6 classes altogether according to the setting type of RF tag.As long as it is calculated in advance per one kind
Place length, and the corresponding setting type of each vehicle is stored in the database, in formally detection speed, when radio frequency day
Line 21 detects the RF tag of any vehicle 3, you can it is long to find out the corresponding place of the vehicle from cdr database immediately
L is spent, the speed V of the vehicle is then calculated using above-mentioned formula (1), so as to competent authority's immediately monitoring highway or one
As car speed in road.It is beneath to illustrate how calculated in advance place length：
Please refer to Fig. 1 and 2, Fig. 2 is the structure chart of the device based on field pattern length calculation method of the present invention.
Wherein, when vehicle 3 enters in the detection zone 20 of radio-frequency antenna 21, radio-frequency readers 22 can be via radio-frequency antenna 21
It reads the number of RF tag and vehicle 3 on vehicle 3 and ingresses and egresses out time TA, TB of detection zone 20, and pass master back
Machine 23.On the other hand, the velocity sensor 5 utilized detects the speed V of vehicle 3, also passes host 23 back, then host 23 is available
Beneath formula (2) calculates the place length L that radio-frequency antenna 21 corresponds to the vehicle 3：
L=V (TB-TA) (2)
Wherein, in order to measure accurate car speed V, high red of accuracy can be used in above-mentioned velocity sensor 5
Outside line sensor or radar microwave sensor.
For the place length calculation method further illustrated the present invention, flow chart shown in Fig. 3 is hereafter coordinated to illustrate.
In step S3100, the vehicle 3 with RF tag is detected with radio-frequency antenna 21.In step S3200, if radio frequency day
Line 21 detects the vehicle 3 with RF tag, then carries out step S3300 and S3600, on the contrary then return to step S3100.In step
In rapid S3300, when radio-frequency antenna 21 detects RF tag on vehicle 3, host 23 by record at that time time (i.e. vehicle 3 into
Enter the time TA of detection zone 20).In step S3400, radio-frequency readers 22 read via radio-frequency antenna 21 and are penetrated on vehicle 3
The number of frequency marking label, and pass host 23 back, there is the RF tag of each vehicle in the Database Unit 231 of host 23 in advance
Number and its corresponding setting type, therefore host 23 can judge which current vehicle 3 is by the RF tag number received
Kind setting type.In step S3500, when radio-frequency antenna 21 detects that vehicle 3 leaves detection zone 20, host 23 will record
Time at that time (i.e. vehicle 3 leaves the time TB of detection zone 20).In step S3600, vehicle is detected using velocity sensor 5
3 speed V, and pass host 23 back.In step S3700, due to V, TA, TB it is known that host 23 can utilize above-mentioned formula (2)
To calculate the place length L that radio-frequency antenna 21 corresponds to the vehicle 3.In step S3800, by the RF tag of the vehicle 3
Setting type and the place length L that is calculated correspond in the Database Unit 231 of deposit host 23.
With reference to Fig. 2 and device and method shown in Fig. 3, you can obtain various types, a large amount of place length data, then
Take it flat same type of place length (that is, with identical vehicle class and identical RF tag paste position)
Mean value, as place length of the present invention about the type.
It is worth noting that, velocity sensor 5 is in the speed V of the detection vehicle 3 in a time interval [TC, TD],
When the time interval [TC, TD] and the radio-frequency antenna 21 detect the time interval [TA, TB] at least one of the vehicle
When dividing coincidence, it just can be considered as same information and calculate the place length L=V (TB-TA) that RF tag is numbered, can so avoid
The information of different vehicle is considered as same information and causes to judge by accident.
According to above-mentioned device and method, various types of place length can be calculated, such as can obtain 6 types altogether
Place length, be stored in the Database Unit 231 of host 23, for formally detecting speed when is used.It can be appreciated that
Different countries and area, the position of the type and RF tag of vehicle on vehicle may be different, it is assumed that the type of vehicle
Shared m classes, and position of the RF tag on vehicle shares n classes, then the place length that the present invention is calculated should have m × n classes.
The present invention is illustrated below formally in the situation that speed is detected on road.Please refer to Fig. 1 and 4, Fig. 4 is according to this
The structure chart that the device of speed is detected using radio frequency of invention.Wherein, when vehicle 3 enters the detection zone 20 of radio-frequency antenna 21
It is interior, radio-frequency readers 22 can read on vehicle 3 number of RF tag via radio-frequency antenna 21 and vehicle 3 enters and from
Time TA, TB of detection zone 20 are opened, and passes host 23 back, then host 23 can be found out from Database Unit 231 described in correspondence
Then the place length L of RF tag number calculates the vehicle velocity V of the vehicle using above-mentioned formula (1).
Please refer to Fig. 1, Fig. 4 and Fig. 5, Fig. 5 is the flow according to the present invention that speed method is detected using radio frequency
Figure.In step S5100, the vehicle 3 with RF tag is detected with radio-frequency antenna 21.In step S5200, if radio frequency
Antenna 21 detects the vehicle 3 with RF tag, then carries out step S5300, on the contrary then return to step S5100.In step
In S5300, when radio-frequency antenna 21 detects RF tag on vehicle 3, by the time for recording at that time, (i.e. vehicle 3 enters host 23
The time TA of detection zone 20).In step S5400, radio-frequency readers 22 read radio frequency on vehicle 3 via radio-frequency antenna 21
The number of label, and pass host 23 back.In step S5500, there is each vehicle in advance in the Database Unit 231 of host 23
RF tag number and its corresponding RF tag setting type and it is described setting type corresponding to place length L,
Therefore can corresponding place length L be found out by RF tag number immediately.In step S5600, when radio-frequency antenna 21 is examined
When measuring vehicle 3 and leaving detection zone 20, by the time for recording at that time, (i.e. vehicle 3 leaves the time of detection zone 20 to host 23
TB).In step S5700, due to L, TA, TB it is known that therefore above-mentioned formula (1) can be utilized to calculate the vehicle velocity V of the vehicle, and
It is stored in Database Unit 231, so as to the speed of vehicle in each road of competent authority's immediately monitoring, and can be used as and hand in the future
Logical statistical analysis is used.
It is found after actual test, it is of the invention accurately to detect vehicle using radio frequency to detect the method and device of speed
Speed, while cost is much smaller than conventional red outside line detection mode or radar microwave detection mode.
Although the present invention is disclosed above with embodiment progress, it is not limited to the present invention, any in belonging to it
Those skilled in the art in technical field without departing from the spirit and scope of the present invention, still can make a little change with repairing
Decorations, therefore protection scope of the present invention should be subject to what claim was defined.
Claims (10)
1. a kind of method that speed is detected using radio frequency, the method includes：
There is the vehicle of RF tag with radio-frequency antenna detection one；
Obtain the time TA that the vehicle enters the radio-frequency antenna detection zone；
Read the number of the RF tag；
Corresponding place length L is found out by the number；
Obtain the time TB that the vehicle leaves the radio-frequency antenna detection zone；
Calculate the speed V=L/ (TB-TA) of the vehicle.
2. the method according to claim 1 that speed is detected using radio frequency, wherein, the place length L is according to institute
The position of the type and the RF tag of vehicle on the vehicle is stated to determine.
3. a kind of device that speed is detected using radio frequency, described device are included：
One radio-frequency antenna has the vehicle of RF tag in detection one in a detection area；
One radio-frequency readers are electrically connected at the radio-frequency antenna, and the volume of the RF tag is read via the radio-frequency antenna
Number；
One host is electrically connected at the radio-frequency readers, when the radio-frequency antenna detects that the vehicle enters the detection
During region, the host generates corresponding time TA, when the radio-frequency antenna detects that the vehicle leaves the detection zone
When, the host generates corresponding time TB, when the radio-frequency readers read the RF tag via the radio-frequency antenna
Number when, the host by it is described number find out corresponding place length L, then calculate the speed V=L/ of the vehicle
(TB-TA)。
4. the device according to claim 3 that speed is detected using radio frequency, wherein, the host includes a database list
Member, is stored with the number of the RF tag and its corresponding RF tag sets type and RF tag setting
Place length corresponding to type.
5. a kind of place length calculation method, the computational methods include：
With vehicle of the radio-frequency antenna detection with RF tag；
Obtain the time TA that the vehicle enters the radio-frequency antenna detection zone；
Read the number of the RF tag；
Obtain the time TB that the vehicle leaves the radio-frequency antenna detection zone；
The speed V of the vehicle is detected with a velocity sensor；
Calculate the place length L=V (TB-TA) of the corresponding number.
6. place length calculation method according to claim 5, wherein, the velocity sensor in time interval [TC,
TD] in the detection vehicle speed V, when the time interval [TC, TD] and the radio-frequency antenna detect the vehicle when
Between section [TA, TB] at least part of coincidence when, calculate the place length L=V (TB-TA) of the corresponding number.
7. place length calculation method according to claim 5, further includes：
Obtain the place length of multiple same RF tag setting types；
Calculate the average value of the place length of these same RF tag setting types.
8. place length calculation method according to claim 7, wherein, the RF tag sets type according to vehicle
The position classification of type and RF tag on vehicle.
9. place length calculation method according to claim 5, wherein, the velocity sensor utilizes infrared detection institute
State the speed V of vehicle.
10. place length calculation method according to claim 5, wherein, the velocity sensor is examined using radar microwave
Survey the speed V of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410386181.6A CN105427623B (en) | 2014-08-07 | 2014-08-07 | The method and device of speed and place length calculation method are detected using radio frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410386181.6A CN105427623B (en) | 2014-08-07 | 2014-08-07 | The method and device of speed and place length calculation method are detected using radio frequency |
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| CN105427623A CN105427623A (en) | 2016-03-23 |
| CN105427623B true CN105427623B (en) | 2018-06-15 |
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| CN201410386181.6A Expired - Fee Related CN105427623B (en) | 2014-08-07 | 2014-08-07 | The method and device of speed and place length calculation method are detected using radio frequency |
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2014
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Patent Citations (8)
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|---|---|---|---|---|
| CN1558381A (en) * | 2004-02-12 | 2004-12-29 | 甘国工 | Token type speed monitoring method and system for vehicle |
| CN1862619A (en) * | 2005-05-13 | 2006-11-15 | 中兴通讯股份有限公司 | System and method for automatically monitoring vehicle overspeed, based on RF identifying technology |
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