CN203910027U - Wireless geomagnetic signal transmission system based on signal lamp landing chassis shell acting as medium and wireless communication signal transmission system - Google Patents
Wireless geomagnetic signal transmission system based on signal lamp landing chassis shell acting as medium and wireless communication signal transmission system Download PDFInfo
- Publication number
- CN203910027U CN203910027U CN201420322124.7U CN201420322124U CN203910027U CN 203910027 U CN203910027 U CN 203910027U CN 201420322124 U CN201420322124 U CN 201420322124U CN 203910027 U CN203910027 U CN 203910027U
- Authority
- CN
- China
- Prior art keywords
- wireless
- signal
- wireless geomagnetism
- geomagnetism
- shell
- Prior art date
- 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.)
- Withdrawn - After Issue
Links
Abstract
Provided is a wireless geomagnetic signal transmission system based on a signal lamp landing chassis shell acting as a medium. The system comprises multiple wireless geomagnetic cylinders which are arranged on the ground; and a wireless geomagnetic host which is arranged in a traffic signal lamp landing chassis. The shell of the traffic signal lamp landing chassis is a transmission medium for wireless communication between the wireless geomagnetic host and the multiple wireless geomagnetic cylinders. The shell is a metal conductive shell. At least one conductive wire of the wireless geomagnetic host is welded or fixed in the shell, and the shell acts as an antenna of the wireless geomagnetic host for transmitting a wireless signal. Also disclosed is a wireless communication signal transmission system based on the signal lamp landing chassis shell acting as the medium. Transmission distance between the wireless geomagnetic host and the wireless geomagnetic cylinders can be enhanced, and a problem of installation place for the wireless geomagnetic host is also solved so that installation is more convenient, maintenance is simple, construction cost is saved and rapid deployment can be realized.
Description
Technical field
The utility model belongs to intelligent transportation field, relates in particular to a kind of antenna equipment for road surface traffic flow detector main frame, about land casing based on signal lamp, is the wireless antenna signal transmission system of medium.
Background technology
For understanding in time the vehicle pass-through situation on urban road, highway and various grade road, to road construction, traffic programme etc. is submitted necessary information, conventionally need on road, bury wireless geomagnetism wagon detector underground, to detect the information such as vehicle passage rate, traffic volume.Existing wireless geomagnetism wagon detector comprises shell and setting circuit board in the enclosure etc.Existing wireless geomagnetism wagon detector shell is by having the body of cavity and the lid of bodies top forms.Because detecting device is embedded in undergroundly, the frequency that vehicle rolls is higher, and the structure of existing shell easily damages, and then causes whole detecting device to damage.
A kind of wireless traffic current sensor is disclosed in 201310534580.8, the magnetoresistive transducer that employing is difficult for being magnetized is as front-end sampling sensor, the geomagnetic disturbance signal that acquisition is affected by motor vehicle, through amplifier amplification, analog to digital conversion, send CPU to, CPU accurately judges the running status of vehicle on it by calculating, study, convergence, drift processing method, by wireless module, with open communications protocol, sends to other receiving and processing equipment.By wireless module, with open communications protocol, send to other receiving and processing equipment again.This wireless traffic stream detects complete succinct, and volume is little, low in energy consumption, communication distance is far away, algorithm is excellent, maintenance is little, low-cost.The vehicle detection technology of using ground bar magnet induction, detection signal is launched by wireless communication mode, thereby realizes radio detection vehicle.Easy for installation, without closing track or extensive damage road surface, internal battery power supply, long service life.
Wireless traffic current sensor, uses the vehicle detection technology of ground bar magnet induction, and detection signal is launched by wireless communication mode, thereby realizes radio detection vehicle.But, when wireless geomagnetism main frame communicates with ground bar magnet, can not realize long-distance transmissions and communicate by letter.And, in order to promote accuracy and the remote property of long-distance transmissions, generally all need to increase extra processing module, not only increase construction cost, and greatly promoted the time of construction.
Utility model content
In order to overcome the defect existing in prior art, the utility model provides that a kind of based on signal lamp, to land casing be the wireless geomagnetism signal transmission system of medium, and concrete technical scheme is as follows: comprising:
Be arranged on the some wireless geomagnetism cylinders on road surface;
Be arranged on the wireless geomagnetism main frame that traffic lights land in cabinet,
It is the transmission medium that described wireless geomagnetism main frame and described some wireless geomagnetism cylinders carry out radio communication that described traffic lights land the shell of cabinet, shell is metallic conduction matter shell, wireless geomagnetism main frame has at least one wire bonds or is fixed in shell, transmitting wireless signals is the antenna as wireless geomagnetism main frame shell, and, select the first half that pad is cabinet, the input impedance of resonance half-wave dipole is about 60 Europe, Europe to 80
Described wireless geomagnetism main frame at least comprises the wireless communication module of communicating by letter with described wireless geomagnetism cylinder, the signal amplification module being connected with wireless communication module, the communication module being connected with external control system, single-chip microcomputer, energy supply control module, wherein single-chip microcomputer connects respectively wireless communication module, communication module and energy supply control module, for communicating with wireless geomagnetism cylinder, by the detected information of described reception wireless geomagnetism cylinder, parse and detect vehicle passage rate, traffic volume is sent to described external control system in interior vehicle detecting information, and by described wireless communication module, be sent to described wireless geomagnetism cylinder after the control information that described external control system is sent parsing.
Based on signal lamp, landing casing is the wireless geomagnetism signal transmission system of medium, also comprise pinnacled some signal amplifying apparatus are set, described signal amplifying apparatus is provided with between the transmission medium of described casing and described earth magnetism post that one stage signal amplifies or multilevel signal amplifies, one of them signal amplifying apparatus is set up and is communicated by letter with the signal of described casing, and one of them signal amplifying apparatus foundation is communicated by letter with the signal between at least one wireless geomagnetism cylinder.
Based on signal lamp, landing casing is a wireless signals system for medium, it is characterized in that, at least comprise somely based on signal lamp, landing casing and being the wireless geomagnetism signal transmission subsystem of medium and controlling total system, wherein,
It is some that based on signal lamp, to land casing be that the wireless geomagnetism signal transmission subsystem of medium at least comprises:
Be arranged on the some wireless geomagnetism cylinders on road surface;
Be arranged on the wireless geomagnetism main frame that traffic lights land in cabinet,
It is the transmission medium that described wireless geomagnetism main frame and described some wireless geomagnetism cylinders carry out radio communication that described traffic lights land the shell of cabinet, shell is metallic conduction matter shell, wireless geomagnetism main frame has at least one wire bonds or is fixed in shell, transmitting wireless signals is the antenna as wireless geomagnetism main frame shell, and, select the first half that pad is cabinet, the input impedance of resonance half-wave dipole is about 60 Europe, Europe to 80
Described wireless geomagnetism main frame at least comprises the wireless communication module of communicating by letter with described wireless geomagnetism cylinder, the signal amplification module being connected with wireless communication module, the communication module being connected with external control system, single-chip microcomputer, energy supply control module, wherein single-chip microcomputer connects respectively wireless communication module, communication module and energy supply control module, for communicating with wireless geomagnetism cylinder, by the detected information of described reception wireless geomagnetism cylinder, parse and detect vehicle passage rate, traffic volume is sent to described external control total system in interior vehicle detecting information, and by described wireless communication module, be sent to described wireless geomagnetism cylinder after the control information that described external control total system is sent parsing,
Control total system, each wireless geomagnetism signal transmission subsystem of wireless connections, detects vehicle passage rate, traffic volume at interior information of vehicles for obtaining respectively, and the work of control line Geomagnetic signal transmission subsystem.
Compared with prior art, the utlity model has following advantage:
First, the utility model utilizes existing traffic lights to land the shell of cabinet as transmission medium, carry out communicating by letter between described wireless geomagnetism main frame and described wireless geomagnetism cylinder, not only can promote the transmission range between wireless geomagnetism main frame and wireless geomagnetism cylinder, and, existing wireless geomagnetism main frame can be arranged on traffic lights and land in cabinet, cost is low, utilized existing resource, also solved the problem of wireless geomagnetism main frame fabricating yard, also make to install more convenient simultaneously, safeguard simple, thereby saved the cost of construction, and can rapid deployment.
Then, consider when communication distance between wireless geomagnetism main frame and described wireless geomagnetism cylinder is farther, the applicant can also be at pinnacled some signal amplifying apparatus, described signal amplifying apparatus is provided with between the transmission medium of described casing and described earth magnetism post that one stage signal amplifies or multilevel signal amplifies, one of them signal amplifying apparatus is set up and is communicated by letter with the signal of described casing, one of them signal amplifying apparatus foundation is communicated by letter with the signal between at least one wireless geomagnetism cylinder, by the further amplifying signal of signal amplifying apparatus, the distance of the communication also simultaneously expanding, but also can accomplish multistage expansion cascade.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the wireless geomagnetism transmission system of medium for landing casing based on signal lamp;
Fig. 2 is the principle assumption diagram of wireless geomagnetism main frame;
Fig. 3 is the schematic diagram of the wireless signals system of medium for landing casing based on signal lamp.
Embodiment
By reference to the accompanying drawings, illustrate the utility model.
Refer to Fig. 1, based on signal lamp, landing casing is a wireless geomagnetism signal transmission system for medium, comprising: be arranged on some wireless geomagnetism cylinders 11 on road surface, be arranged on wireless geomagnetism main frame 13, described traffic lights that traffic lights land in cabinet 12 and land the shell 14 of cabinet and carry out the transmission medium of radio communication for described wireless geomagnetism main frame 13 and described some wireless geomagnetism cylinders 11.
Wherein, wireless geomagnetism cylinder 11 is generally wireless geomagnetism sensing equipment.The ferromagnetic material containing such as vehicle itself can exert an influence to the Geomagnetic signal of vehicle domain of the existence, and the geomagnetic chart linesofforce of vehicle domain of the existence is bent.When vehicle is through near sensor, sensor can sensitively perceive the variation of signal, through signal analysis, just can obtain detecting the relevant information of target, and this signal is sent by wireless mode.
Traffic lights land after the shell 14 of cabinet 12 detects corresponding signal and transfer to described wireless geomagnetism main frame 13.
Wireless geomagnetism main frame 13 at least comprises the wireless communication module 131 of communicating by letter with described wireless geomagnetism cylinder 11, the signal amplification module 135 being connected with wireless communication module, the communication module 132 being connected with external control system, single-chip microcomputer 133, energy supply control module 134, wherein single-chip microcomputer 133 connects respectively wireless communication module 131, communication module 132 and energy supply control module 134, for communicating with wireless geomagnetism cylinder 11, by described reception wireless geomagnetism cylinder 11 detected information, parse and detect vehicle passage rate, traffic volume is sent to described external control system in interior vehicle detecting information, and by described wireless communication module, be sent to described wireless geomagnetism cylinder after the control information that described external control system is sent parsing.
It should be noted that, communicating by letter between wireless geomagnetism main frame 13 and wireless geomagnetism cylinder 11 is prior art, utility model point of the present utility model is that wireless geomagnetism main frame 13 is arranged on to traffic lights to land in cabinet 12, and traffic lights are landed to the shell 14 of cabinet 12 is utility model core of the present utility model as the transmission medium of wireless signal.Wireless geomagnetism main frame 13 can arrange existing module, such as, battery, antenna, crystal oscillator and crystal oscillating circuit, voltage transitions chip etc., just describe in detail at this again.Certainly, to land the shell 14 of cabinet can be metal chassis to traffic lights.
Shell 14 is metallic conduction matter shell, and transmitting wireless signals is just treated as antenna shell.Wireless geomagnetism main frame 13 at least has 1 wire bonds or is fixed to the inside of shell 14.Shell has been equivalent to the antenna of wireless geomagnetism main frame like this.Just this antenna ratio is more special, and the parameters such as resistance that calculate according to shell, carry out the modification that arranges of wireless geomagnetism main frame wireless transmission parameter, makes it to meet the parameter that signal sends correct.
The input impedance of antenna is one of important parameter of antenna, because know after the input impedance of antenna, just can select suitable feed transmission line to match.Position of the input impedance of antenna and the length of antenna, shape, feeding point etc. is relevant.The impedance that the application can adopt existing Poynting vector method, equivalent Transmission line method and induced potential method to calculate the utility model particular antenna, selects suitable feed transmission line to match thus, settling signal transmission.
The junction of casing and connecting line is called input end or the feeding point of antenna.For wire antenna, the voltage of antenna input and the ratio of electric current are called the input impedance of antenna.For mouth planar antenna (casing belongs to a mouthful planar antenna), on conventional tie point, voltage standing wave ratio (VSWR) represents the impedance operator of antenna.The input reactance of antenna characterizes and is stored at the power in antenna near field.Electricity size is much smaller than the antenna of operation wavelength, and its input reactance is very large, and for example short dipole antenna has very large capacitive reactance; Electricity small loop antenna has very large induction reactance.The half-wave dipole input impedance that diameter is very thin is about 73.1+j42.5 Europe.In actual applications, for the ease of coupling, the input reactance of generally wishing symmetrical dipole is zero, and oscillator length is at this moment called resonance length.Half wavelength in the Length Ratio free space of resonance half-wave dipole is slightly shorter, and engineering is used upper general the first half that pad is cabinet of selecting.The input impedance of resonance half-wave dipole is about 60 Europe, Europe to 80, is 70 Europe best.The impedance operator of mouth planar antenna represents with voltage standing wave ratio (VSWR) or the reflection coefficient of certain point on feeder line.When reflection coefficient is zero, standing-wave ratio is while being 1, is called coupling.For the ease of coupling, on wireless geomagnetism master machine antenna tie point side, bypass also can arrange existing conditioned circuit and realize, and realizes adjustment standing-wave ratio (SWR) like this by adjusting bypass circuit and corresponding software, realizes the optimum matching of antenna.
Wireless geomagnetism signal transmission system, also comprise pinnacled some signal amplifying apparatus 15 are set, described signal amplifying apparatus is provided with between the transmission medium of described casing 14 and described earth magnetism post that one stage signal amplifies or multilevel signal amplifies, one of them signal amplifying apparatus 15 is set up and is communicated by letter with the signal of described casing 14, and one of them signal amplifying apparatus 15 foundation is communicated by letter with the signal between at least one wireless geomagnetism cylinder 11.Such as, on street lamp or tree, corresponding signal amplifying apparatus 15 is set, it is existing signal amplifier, can be according to wireless geomagnetism signal transmission distance, one or more signal amplifiers 15 can be set, realize between the transmission medium of casing 14 and described earth magnetism post 11, being provided with that one stage signal amplifies or multilevel signal amplifies.
It should be noted that, wireless geomagnetism cylinder 11 is interior can also arrange a filter processing unit of processing for the signal receiving being carried out to filtering and detection.
The utility model utilizes existing traffic lights to land the shell 14 of cabinet as transmission medium, carry out communicating by letter between described wireless geomagnetism main frame 13 and described wireless geomagnetism cylinder 11, not only can promote the transmission range between wireless geomagnetism main frame 13 and wireless geomagnetism cylinder 11, and, existing wireless geomagnetism main frame 13 can be arranged on traffic lights and land in cabinet 12, cost is low, utilized existing resource, also solved the problem of wireless geomagnetism main frame 13 fabricating yards, also make to install more convenient simultaneously, safeguard simple, thereby saved the cost of construction, and can rapid deployment.
Refer to Fig. 3, a kind ofly based on signal lamp, land casing 14 for the wireless signals system of medium, at least comprise and somely based on signal lamp, land wireless geomagnetism signal transmission subsystem 2 that casing 14 is medium and control total system 1, wherein,
Somely based on signal lamp, land casing 14 and at least comprise for the wireless geomagnetism signal transmission subsystem of medium:
Be arranged on the some wireless geomagnetism cylinders 11 on road surface;
Be arranged on the wireless geomagnetism main frame 13 that traffic lights land in cabinet,
Described traffic lights land the shell 14 of cabinet and carry out the transmission medium of radio communication for described wireless geomagnetism main frame 13 and described some wireless geomagnetism cylinders 11,
Described wireless geomagnetism main frame 13 at least comprises the wireless communication module 132 of communicating by letter with described wireless geomagnetism cylinder 11, the signal amplification module being connected with wireless communication module 131, the communication module 132 being connected with external control system, single-chip microcomputer 133, energy supply control module 134, wherein single-chip microcomputer 133 connects respectively wireless communication module 131, communication module 132 and energy supply control module 134, for communicating with wireless geomagnetism cylinder 11, by described reception wireless geomagnetism cylinder 11 detected information, parse and detect vehicle passage rate, traffic volume is sent to described external control total system 1 in interior vehicle detecting information, and by described wireless communication module 131, be sent to described wireless geomagnetism cylinder 11 after the control information that described external control total system 1 is sent parsing,
Control total system 1, each wireless geomagnetism signal transmission subsystem 2 of wireless connections, detects vehicle passage rate, traffic volume at interior information of vehicles for obtaining respectively, and the work of control line Geomagnetic signal transmission subsystem 2.
Wireless geomagnetism signal transmission subsystem 2 also comprises pinnacled some signal amplifying apparatus 15 is set, described signal amplifying apparatus 15 is provided with between the transmission medium of described casing 14 and described earth magnetism post 11 that one stage signal amplifies or multilevel signal amplifies, one of them signal amplifying apparatus 15 is set up and is communicated by letter with the signal of described casing 14, and one of them signal amplifying apparatus 15 foundation is communicated by letter with the signal between at least one wireless geomagnetism cylinder 11.It is metal chassis that described traffic lights land the shell 14 of cabinet.
Disclosed is above only the application's a specific embodiment, but the application is not limited thereto.The changes that any person skilled in the art can think of, all should drop in the application's protection domain.
Claims (7)
1. based on signal lamp, landing casing is a wireless geomagnetism signal transmission system for medium, it is characterized in that, comprising:
Be arranged on the some wireless geomagnetism cylinders on road surface;
Be arranged on the wireless geomagnetism main frame that traffic lights land in cabinet,
It is the transmission medium that described wireless geomagnetism main frame and described some wireless geomagnetism cylinders carry out radio communication that described traffic lights land the shell of cabinet, shell is metallic conduction matter shell, wireless geomagnetism main frame has at least one wire bonds or is fixed in shell, transmitting wireless signals is the antenna as wireless geomagnetism main frame shell, and, select the first half that pad is cabinet, the input impedance of resonance half-wave dipole is about 60 Europe, Europe to 80;
Described wireless geomagnetism main frame at least comprises the wireless communication module of communicating by letter with described wireless geomagnetism cylinder, the signal amplification module being connected with wireless communication module, the communication module being connected with external control system, single-chip microcomputer, energy supply control module, wherein single-chip microcomputer connects respectively wireless communication module, communication module and energy supply control module, for communicating with wireless geomagnetism cylinder, by the detected information of described reception wireless geomagnetism cylinder, parse and detect vehicle passage rate, traffic volume is sent to described external control system in interior vehicle detecting information, and by described wireless communication module, be sent to described wireless geomagnetism cylinder after the control information that described external control system is sent parsing.
As described in right 1 based on signal lamp, to land casing be the wireless geomagnetism signal transmission system of medium, it is characterized in that, also comprise pinnacled some signal amplifying apparatus are set, described signal amplifying apparatus is provided with between the transmission medium of described casing and described earth magnetism post that one stage signal amplifies or multilevel signal amplifies, one of them signal amplifying apparatus is set up and is communicated by letter with the signal of described casing, and one of them signal amplifying apparatus foundation is communicated by letter with the signal between at least one wireless geomagnetism cylinder.
3. as claimed in claim 1 or 2 based on signal lamp, to land casing be the wireless geomagnetism signal transmission system of medium, it is characterized in that, it is metal chassis that described traffic lights land the shell of cabinet.
It is 4. as claimed in claim 1 or 2 that based on signal lamp, to land casing be the wireless geomagnetism signal transmission system of medium, it is characterized in that,
One filter processing unit of processing for the signal receiving being carried out to filtering and detection is also set in described wireless geomagnetism cylinder.
5. based on signal lamp, landing casing is a wireless signals system for medium, it is characterized in that, at least comprise somely based on signal lamp, landing casing and being the wireless geomagnetism signal transmission subsystem of medium and controlling total system, wherein,
It is some that based on signal lamp, to land casing be that the wireless geomagnetism signal transmission subsystem of medium at least comprises:
Be arranged on the some wireless geomagnetism cylinders on road surface;
Be arranged on the wireless geomagnetism main frame that traffic lights land in cabinet,
It is the transmission medium that described wireless geomagnetism main frame and described some wireless geomagnetism cylinders carry out radio communication that described traffic lights land the shell of cabinet, shell is metallic conduction matter shell, wireless geomagnetism main frame has at least one wire bonds or is fixed in shell, transmitting wireless signals is the antenna as wireless geomagnetism main frame shell, and, select the first half that pad is cabinet, the input impedance of resonance half-wave dipole is about 60 Europe, Europe to 80;
Described wireless geomagnetism main frame at least comprises the wireless communication module of communicating by letter with described wireless geomagnetism cylinder, the signal amplification module being connected with wireless communication module, the communication module being connected with external control system, single-chip microcomputer, energy supply control module, wherein single-chip microcomputer connects respectively wireless communication module, communication module and energy supply control module, for communicating with wireless geomagnetism cylinder, by the detected information of described reception wireless geomagnetism cylinder, parse and detect vehicle passage rate, traffic volume is sent to described external control total system in interior vehicle detecting information, and by described wireless communication module, be sent to described wireless geomagnetism cylinder after the control information that described external control total system is sent parsing,
Control total system, each wireless geomagnetism signal transmission subsystem of wireless connections, detects vehicle passage rate, traffic volume at interior information of vehicles for obtaining respectively, and the work of control line Geomagnetic signal transmission subsystem.
One kind based on signal lamp, to land casing be the wireless signals system of medium, it is characterized in that, wireless geomagnetism signal transmission system also comprises pinnacled some signal amplifying apparatus is set, described signal amplifying apparatus is provided with between the transmission medium of described casing and described earth magnetism post that one stage signal amplifies or multilevel signal amplifies, one of them signal amplifying apparatus is set up and is communicated by letter with the signal of described casing, and one of them signal amplifying apparatus foundation is communicated by letter with the signal between at least one wireless geomagnetism cylinder.
As described in claim 5 or 6 based on signal lamp, to land casing be the wireless signals system of medium, it is characterized in that, it is metal chassis that described traffic lights land the shell of cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322124.7U CN203910027U (en) | 2014-06-17 | 2014-06-17 | Wireless geomagnetic signal transmission system based on signal lamp landing chassis shell acting as medium and wireless communication signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322124.7U CN203910027U (en) | 2014-06-17 | 2014-06-17 | Wireless geomagnetic signal transmission system based on signal lamp landing chassis shell acting as medium and wireless communication signal transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910027U true CN203910027U (en) | 2014-10-29 |
Family
ID=51784284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420322124.7U Withdrawn - After Issue CN203910027U (en) | 2014-06-17 | 2014-06-17 | Wireless geomagnetic signal transmission system based on signal lamp landing chassis shell acting as medium and wireless communication signal transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203910027U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064033A (en) * | 2014-06-17 | 2014-09-24 | 浙江力石科技股份有限公司 | Wireless geomagnetic transmission system with signal lamp ground machine case shell as medium |
-
2014
- 2014-06-17 CN CN201420322124.7U patent/CN203910027U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064033A (en) * | 2014-06-17 | 2014-09-24 | 浙江力石科技股份有限公司 | Wireless geomagnetic transmission system with signal lamp ground machine case shell as medium |
| CN104064033B (en) * | 2014-06-17 | 2016-06-29 | 浙江力石科技股份有限公司 | Wireless geomagnetism that casing is medium transmission system is landed based on signal lights |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101908278B (en) | Wireless magnetic induction intensity vehicle detection method and device | |
| CN103809206A (en) | Underground water detection device and detection method based on combination of nuclear magnetic resonance and transient electromagnetic method | |
| CN105118297A (en) | System and method for detecting and identifying type of vehicle | |
| CN101226690A (en) | Wireless geomagnetism type vehicle detecting system | |
| CN201845087U (en) | Multifunctional tracking positioning receiver for pipeline cleaner | |
| CN203910027U (en) | Wireless geomagnetic signal transmission system based on signal lamp landing chassis shell acting as medium and wireless communication signal transmission system | |
| CN205003856U (en) | Magnetoresistive sensor vehicle test device | |
| CN103456157A (en) | Long distance passive wireless sensor remote-measuring system | |
| CN202736294U (en) | Wireless vehicle detection instrument | |
| CN104218636A (en) | Positioning method and positioning system for wireless charging | |
| CN103728496A (en) | Antenna tuner impedance detection method based on phase detection | |
| CN205264050U (en) | Microwave vehicles detection device based on earth magnetism guide | |
| CN104064033B (en) | Wireless geomagnetism that casing is medium transmission system is landed based on signal lights | |
| CN100501796C (en) | Minisize buried automobile detector | |
| CN203480047U (en) | Vehicle-mounted transient electromagnetic rapid exploration device | |
| CN202711467U (en) | Vehicle detecting device based on magnetic sensor | |
| CN201114012Y (en) | Wireless sensor network device utilizing GMR sensor for detecting vehicle information | |
| CN206039852U (en) | Wireless vehicle detecting system | |
| CN205264077U (en) | Earth magnetism car position detecting system based on repeater | |
| CN211928755U (en) | Vehicle detection system based on 2.4GHz auxiliary judgment | |
| CN203732591U (en) | Detection system and detection device for magnetic field and electromagnetic field interfering electricity stealing | |
| CN204066397U (en) | Based on the vehicle detection circuit arrangement of geomagnetic sensor | |
| CN104637341A (en) | Vehicle monitoring device, vehicle management system, vehicle-mounted device and vehicle management method | |
| CN201897879U (en) | Wireless vehicle detector | |
| CN206805781U (en) | A kind of geomagnetic type vehicle detection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |