CN107966696A - The alignment system of short-distance wireless communication - Google Patents
The alignment system of short-distance wireless communication Download PDFInfo
- Publication number
- CN107966696A CN107966696A CN201711216056.0A CN201711216056A CN107966696A CN 107966696 A CN107966696 A CN 107966696A CN 201711216056 A CN201711216056 A CN 201711216056A CN 107966696 A CN107966696 A CN 107966696A
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- CN
- China
- Prior art keywords
- signal
- camera head
- monitor equipment
- distance
- head monitor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
Abstract
The invention discloses the alignment system of short-distance wireless communication, belong to wireless communication technology field, including handheld device and camera head monitor equipment, the handheld device is equipped with signal receiver, the camera head monitor equipment is equipped with signal projector, wireless receiving module and wireless transmitter module are equipped with the signal receiver and signal projector, the camera head monitor equipment between any two can be with networking, alignment system measurement distance S=v △ t=λ f △ t, wherein λ is the wavelength of radio wave, f is the frequency of radio wave, △ t are every the time difference；The present invention provides the monitoring device that a kind of distance that can be shown according to handheld device finds failure, fast positioning, easy to safeguard, the mutual networking of camera head monitor equipment room energy, is not required to transmit data by wireless communication, has saved use cost.
Description
Technical field
The present invention relates to the alignment system of wireless communications application technical field, more particularly to short-distance wireless communication.
Background technology
For fixing the intelligent monitoring bar of monitoring device, it is generally fixed on road surface, construction personnel generally can be by monitoring bar
Specific location mark, give maintenance department.In road information than more comprehensively place, construction personnel is in mark specific location
When, it will mark very well, but the city in some construction, a landmark can only be marked and got on, when urban road
During operation, may near landmark building or object of reference it is modified or remove.When equipment breaks down, then go for monitoring
During bar, specific location and orientation have often been can not find, very big difficulty is brought to investigation and maintenance work.
The content of the invention
The purpose of the present invention is to solve shortcoming existing in the prior art, and proposition is a kind of easy to operate, can be fast
Fast locating and monitoring equipment, and the alignment system for the short-distance wireless communication being maintained at the first time.
To achieve these goals, present invention employs following technical solution：
The alignment system of short-distance wireless communication, including handheld device and camera head monitor equipment,
The handheld device is equipped with signal receiver, and the camera head monitor equipment is equipped with signal projector,
Wireless receiving module and wireless transmitter module are equipped with the signal receiver and signal projector,
The camera head monitor equipment between any two can with networking,
The method of alignment system measurement distance is as follows：
1) emitter starts timing to spatial emission radio wave while emission time；
2) when radio wave is propagated in atmosphere, if encountering reception device in space, the wireless of same frequency is received
The signal that electric wave is sent, obtains receiving time；
3) system can subtract each other launch time and receiving time, obtain interval time difference △ t；
4) the aerial spread speed of radio wave is v=λ f, and wherein λ is the wavelength of radio wave, and f is radio wave
Frequency；
5) launch point is finally calculated to the distance S of receiving point,
S=v △ t=λ f △ t
Wherein, tranmitting frequency and wavelength are fixed value.
Preferably, the camera head monitor equipment constantly outwards launches signal, the signal of transmitting include tranmitting frequency and
Launch time.
Preferably, alignment system can calibrate receiving and transmitting signal, and calibration method is：Camera head monitor equipment is outwards launched
After signal, if surrounding has signal response, handheld device is transmitted to camera head monitor equipment with same encoded content again, transmitting
Signal include away from discrete time, the signal that the signal received for calibrating handheld device is sent out with camera head monitor equipment
Whether time and distance are consistent.
Preferably, when having two or three or four camera head monitor equipment in a kilometer range, camera head monitor equipment
Outwards transmitting signal, other camera head monitor equipment also have signal response, but distance is fixed, if with fixed frequency and
When different frequency outwards launches signal, the distance received every time is identical, then explanation link is other camera head monitor equipment hair
The signal gone out.
Preferably, during handheld mobile device, the distance that the signal receiver collects can constantly change, when camera is supervised
Control equipment and handheld device close to when, apart from smaller, when camera head monitor equipment and handheld device away from when, distance is bigger.
Compared with prior art, the invention has the advantages that：The positioning system of the short-distance wireless communication of the present invention
System is mainly used in the positioning of short-range device, can realize locating and tracking using free frequency range point, one, space node with
Fixed frequency transmitting, i.e., as emission source, another node of space receives the signal that fixed transmission comes as receiving, and leads to
Parsing and demodulation are crossed, the size for then mutually adjusting frequency connects, and close with handheld device, distance can be less and less,
Conversely, distance is just increasing, orientation can be determined in the above manner, finds out emission source and reception source, so as to reach
The purpose of positioning, the present invention is easy to operate, and reaction rate is fast, accurate positioning.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the mutual network model figure of camera head monitor equipment of the present invention；
Fig. 3 is wireless receiving module of the present invention and wireless transmitter module schematic diagram.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.
With reference to Fig. 1-3, the alignment system of short-distance wireless communication, including handheld device 10 and camera head monitor equipment 20,
Handheld device 10 is equipped with signal receiver, and camera head monitor equipment 20 is equipped with signal projector, signal receiver and signal
Wireless receiving module and wireless transmitter module are equipped with transmitter, it is similar with serial ports operational mode, it is flexible and convenient to use；Shooting
Head monitoring device 20 between any two can be with networking, it is not necessary to wireless communication transmits data, between each other can networking, reduce
Use cost.
The method of alignment system measurement distance is as follows：
1) emitter starts timing to spatial emission radio wave while emission time；
2) when radio wave is propagated in atmosphere, if encountering reception device in space, the wireless of same frequency is received
The signal that electric wave is sent, obtains receiving time；
3) system can subtract each other launch time and receiving time, obtain interval time difference △ t；
4) the aerial spread speed of radio wave is v=λ f, and wherein λ is the wavelength of radio wave, and f is radio wave
Frequency；
5) launch point is finally calculated to the distance S of receiving point,
S=v △ t=λ f △ t
Wherein, tranmitting frequency and wavelength are fixed value.
Camera head monitor equipment constantly outwards launches signal, and the signal of transmitting includes tranmitting frequency and launch time, transmitting
Frequency can be the same or different.
Alignment system can calibrate receiving and transmitting signal, and calibration method is：After camera head monitor equipment outwards launches signal,
If surrounding has signal response, handheld device is transmitted to camera head monitor equipment, the signal of transmitting with same encoded content again
The signal time that is sent out including the signal away from discrete time, received for calibrating handheld device with camera head monitor equipment and
Whether distance is consistent, or range error very little, so the equipment around explanation with the presence of that can communicate, and is also determined two at the same time
The distance between person, if being afraid of that error is larger, can determine distance by varying frequency size, change regardless of frequency,
Distance between the two will not change.
When having two or three or four camera head monitor equipment in one kilometer range, camera head monitor equipment is outwards launched
Signal, other camera head monitor equipment also have signal response, but distance is fixed, if with fixed frequency and different frequency
Outwards during transmitting signal, the distance received every time is identical, then explanation link is that other camera head monitor equipment fixed are sent
Signal, can be used for distinguish received signal be mobile hand-held device or fixation camera head monitor equipment, based on this,
Maintenance personnel constantly walks to the direction that distance diminishes, it is possible to positioning signal emission source, so as to achieve the purpose that positioning.
Handheld device 10 move when, the distance that signal receiver collects can constantly change, when camera head monitor equipment with
Handheld device close to when, apart from smaller, when camera head monitor equipment and handheld device away from when, distance is bigger.
Present invention is mainly used for the positioning for searching rest point, according to the similar principle of global position system, maintenance personnel is allowed
Handheld device 10 is held in hand, camera head monitor equipment 20 is placed in monitoring bar, camera head monitor equipment 20 is sent out equipped with signal
Emitter, handheld device 10 are equipped with signal receiver, once in signal generator and signal receiver communication range, Liang Zhehui
AutoLink, after the completion of link, can send time and frequency size, after reception, calculating is set out by launch point between the two
Penetrate the time difference of moment and the time of reception, recycle formula to calculate the distance of point-to-point transmission, such maintenance personnel can be according to distance
Distance find out of order monitoring bar, realize positioning.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. the alignment system of short-distance wireless communication, it is characterised in that：Including handheld device and camera head monitor equipment,
The handheld device is equipped with signal receiver, and the camera head monitor equipment is equipped with signal projector, described
Signal receiver and signal projector on be equipped with wireless receiving module and wireless transmitter module,
The camera head monitor equipment between any two can with networking,
The method of alignment system measurement distance is as follows：
1) emitter starts timing to spatial emission radio wave while emission time；
2) when radio wave is propagated in atmosphere, if encountering reception device in space, the radio wave of same frequency is received
The signal sent, obtains receiving time；
3) system can subtract each other launch time and receiving time, obtain interval time difference △ t；
4) the aerial spread speed of radio wave is v=λ f, and wherein λ is the wavelength of radio wave, and f is the frequency of radio wave
Rate；
5) launch point is finally calculated to the distance S of receiving point,
S=v △ t=λ f △ t
Wherein, tranmitting frequency and wavelength are fixed value.
2. the alignment system of short-distance wireless communication according to claim 1, it is characterised in that the camera head monitor
Equipment constantly outwards launches signal, and the signal of transmitting includes tranmitting frequency and launch time.
3. the alignment system of short-distance wireless communication according to claim 1, it is characterised in that alignment system can be to transmitting-receiving
Signal is calibrated, and calibration method is：After camera head monitor equipment outwards launches signal, if surrounding has signal response, hold
Equipment is transmitted to camera head monitor equipment with same encoded content again, and the signal of transmitting was included away from discrete time, for calibrating
Whether the signal time and distance that the signal that handheld device receives is sent out with camera head monitor equipment are consistent.
4. the alignment system of short-distance wireless communication according to claim 1, it is characterised in that have two in a kilometer range
When platform or three or four camera head monitor equipment, camera head monitor equipment outwards launches signal, other camera head monitor equipment
Also signal response is had, but distance is fixed, if outwards launch signal with fixed frequency and different frequency, is received every time
Distance it is identical, then explanation link is signal that other camera head monitor equipment are sent.
5. the alignment system of short-distance wireless communication according to claim 4, it is characterised in that during handheld mobile device,
The distance that the signal receiver collects can constantly change, when camera head monitor equipment and handheld device close to when, distance is got over
It is small, when camera head monitor equipment and handheld device away from when, distance is bigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711216056.0A CN107966696A (en) | 2017-11-28 | 2017-11-28 | The alignment system of short-distance wireless communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711216056.0A CN107966696A (en) | 2017-11-28 | 2017-11-28 | The alignment system of short-distance wireless communication |
Publications (1)
| Publication Number | Publication Date |
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| CN107966696A true CN107966696A (en) | 2018-04-27 |
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| CN201711216056.0A Pending CN107966696A (en) | 2017-11-28 | 2017-11-28 | The alignment system of short-distance wireless communication |
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Citations (6)
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|---|---|---|---|---|
| CN101207636A (en) * | 2006-12-19 | 2008-06-25 | 国际商业机器公司 | Method and system for controlling and calibrating wireless access point range |
| CN101815206A (en) * | 2009-02-25 | 2010-08-25 | 珠海市博仕电子科技有限公司 | 5.8G wireless intelligent monitored transmitting/receiving equipment and transmitting-receiving system constituted thereby |
| WO2013171679A1 (en) * | 2012-05-15 | 2013-11-21 | Albert-Ludwigs-Universität Freiburg | Handheld-device-based indoor localization system and method |
| CN103491352A (en) * | 2013-10-08 | 2014-01-01 | 尹梦寒 | Wireless locating and monitoring system of intelligent community |
| CN103929617A (en) * | 2014-04-14 | 2014-07-16 | 李兴海 | Multi-angle on-site law enforcement information acquisition and transmission system for police |
| CN105554457A (en) * | 2015-12-22 | 2016-05-04 | 中原智慧城市设计研究院有限公司 | Beidou positioning-based intelligent community surveillance and camera system |
-
2017
- 2017-11-28 CN CN201711216056.0A patent/CN107966696A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207636A (en) * | 2006-12-19 | 2008-06-25 | 国际商业机器公司 | Method and system for controlling and calibrating wireless access point range |
| CN101815206A (en) * | 2009-02-25 | 2010-08-25 | 珠海市博仕电子科技有限公司 | 5.8G wireless intelligent monitored transmitting/receiving equipment and transmitting-receiving system constituted thereby |
| WO2013171679A1 (en) * | 2012-05-15 | 2013-11-21 | Albert-Ludwigs-Universität Freiburg | Handheld-device-based indoor localization system and method |
| CN103491352A (en) * | 2013-10-08 | 2014-01-01 | 尹梦寒 | Wireless locating and monitoring system of intelligent community |
| CN103929617A (en) * | 2014-04-14 | 2014-07-16 | 李兴海 | Multi-angle on-site law enforcement information acquisition and transmission system for police |
| CN105554457A (en) * | 2015-12-22 | 2016-05-04 | 中原智慧城市设计研究院有限公司 | Beidou positioning-based intelligent community surveillance and camera system |
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Application publication date: 20180427 |
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