CN209517119U - A kind of parking lot DSRC roadside device - Google Patents
A kind of parking lot DSRC roadside device Download PDFInfo
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- CN209517119U CN209517119U CN201821811860.3U CN201821811860U CN209517119U CN 209517119 U CN209517119 U CN 209517119U CN 201821811860 U CN201821811860 U CN 201821811860U CN 209517119 U CN209517119 U CN 209517119U
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- digital pad
- switch
- power amplifier
- temperature
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Abstract
The utility model provides a kind of parking lot DSRC roadside device, including primary processor, main microwave chip, RF switch, first digital pad, power amplifier, second digital pad, low-noise amplifier, wherein, the primary processor is connected with the main microwave chip, the main microwave chip is connected with first digital pad, first digital pad is connected with the power amplifier, the power amplifier is connected with the RF switch, the RF switch is connected with the low-noise amplifier, the low-noise amplifier is connected with second digital pad, second digital pad is connected with the main microwave chip；First digital pad and power amplifier composition signal emit link, and the low-noise amplifier and second digital pad form signal receives link.The technical solution of the utility model can reduce equipment cost, reduce equipment volume size, and in-site installation is convenient and efficient.
Description
Technical field
The utility model relates to intelligent transportation fields, more particularly, to a kind of parking lot DSRC roadside device.
Background technique
With the increase of high grade highway construction in China mileage, highway ETC non-parking charge technology constantly develops, peace
Vehicle fleet equipped with OBU is constantly rising.In order to which the vehicle for being equipped with OBU can not only be realized not in expressway entrance and exit
Car park payment, and non-parking charge can also be realized in urban parking area entrance, country is proposed parking lot electronic charging state
Family standard GB/T 35070-2018.The wherein part 2 of parking lot electronic charging: terminal device technical requirements GB/T
35070.2-2018 is the case where being different from the entrance of highway according to use environment and installation environment to roadside device, right
Some of which parameter is also adjusted.
There are two microwave array antenna plate, Microwave emission circuits transmitting array antenna plate, microwave for current roadside device
Receiving circuit has receiving array antenna plate.The communications cable and power cable use client cables, and connector is mostly connected using round multicore
Device is connect, cable and connector need to be welded with electric iron.
The disadvantages of this solution is that transmitting microwave region cannot be completely coincident with microwave region is received；More array days
Line plate, increased costs, equipment volume become larger.Client cables length is fixed, due to expressway entrance and exit installation environment standard, institute
Not have to be cut out, using regular length, it is mounted directly, there is installation advantage.And it the installation environment complexity in parking lot and does not mark
Standard does not have regular length requirement to length of cable, the use of regular length cable is not to have grown cost of idleness, and being exactly short needs now
Field carries out welding production using soldering iron, is unfavorable for construction site Fast Installation.
In addition, roadside device is mostly in outside work, temperature range changes greatly, and microwave current circuit is influenced by temperature change,
Power amplifier chip transmission power is increased with temperature, and transmission power reduces；As temperature reduces, transmission power increases.Meeting
The successful microwave region of field adjustable is caused, with temperature change, is showed in the summer in winter inconsistent.
Utility model content
Big, cable construction installation that the purpose of the utility model is to overcome parking lot roadside device volumes in the prior art is not
Just, circuitry is affected by temperature the defects of larger, provides a kind of parking lot DSRC roadside device.
To achieve the goals above, the utility model provides following technical solution:
The utility model provides a kind of parking lot DSRC roadside device, including primary processor, main microwave chip, radio frequency are opened
Pass, the first digital pad, power amplifier, the second digital pad, low-noise amplifier, wherein
The primary processor is connected with the main microwave chip, and is configured to, to the coding and decoding of data flow；
The main microwave chip is connected with first digital pad, and is configured to, and realizes the debugging of encoded data stream
With the demodulation of microwave data stream, and emit signal to first digital pad；
First digital pad is connected with the power amplifier, and is configured to, and adjusts transmission power, signal is sent out
It send to the power amplifier；
The power amplifier is connected with the RF switch, and is configured to, and carries out power amplification to transmitting signal, will put
Signal after big is sent to the RF switch；
The RF switch is connected with the low-noise amplifier, and is configured to, and to transmitting signal and receives signal progress
Switching；
The low-noise amplifier is connected with second digital pad, and is configured to, and puts to received signal
Greatly, amplified signal is sent to second digital pad；
Second digital pad is connected with the main microwave chip, and is configured to, adjustment signal receiving sensitivity, and
The signal received is sent to the main microwave chip；
First digital pad and the power amplifier composition signal emit link, the low-noise amplifier and
Second digital pad forms signal receives link.
It optionally, further include array antenna plate, the array antenna plate is connected with the RF switch.
Optionally, further include temperature compensation attenuator, the temperature compensation attenuator be set to the main microwave chip and
It between first digital pad, and is configured to, is decayed according to the signal that temperature change adjusts the signal transmitting link.
Optionally, the signal for adjusting the signal transmitting link according to temperature change is decayed, including,
Decayed in advance when room temperature to signal；
Signal is reduced when temperature increases and is decayed；
Signal is increased when temperature reduces and is decayed.
It optionally, further include communication interface,
The communication interface is connected with the primary processor.
It optionally, further include network interface connector,
The network interface connector is connected with the communication interface, and is configured to, and has not only transmitted signal but also has transmitted power supply.
Optionally, the network interface connector is RJ45.
Optionally, the network interface connector is provided with water-proof protection device.
The technical solution of the utility model advantage is as follows:
1) RF switch and an array antenna plate are used, Microwave emission region and microwave receiving region one can be both made
It causes, and reduces equipment cost, reduce equipment volume size；
2) network interface connector of the utility model can be used straight through cable as communication line and power supply line, both transmit letter
Number again transmission power supply, construction site make network interface connector, convenient and efficient, save the cost；
3) temperature compensation attenuator of the utility model setting can emit the letter of link according to temperature change adjustment signal
Number decaying, can guarantee signal transmitting link decaying fluctuation it is smaller, thus guarantee port transmission power keep stablize；
4) power amplifier is used, reduces the amplification link series of signal transmitting link, had both met new state
Mark requires, and increases reliability, while also reducing costs because reducing material.
Detailed description of the invention
Fig. 1 shows a kind of schematic diagram of parking lot DSRC roadside device of the utility model.
Fig. 2 shows the schematic diagrames of another parking lot DSRC roadside device of the utility model.
Fig. 3 shows the schematic diagram of the equipment including temperature compensation attenuator.
Fig. 4 shows the schematic diagram of the equipment comprising network interface connector.
Specific embodiment
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, reference label refers to that this is practical new
Component, technology in type, so as to the advantages of the utility model and feature is realized under appropriate circumstances can be easier to be understood.Under
The description in face is the materialization to the utility model claims, and relevant to claim other is not clearly stated
Specific implementation also belongs to the scope of the claims.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.Below actually to the description of at least one exemplary embodiment
It is merely illustrative, never as to the utility model and its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
Fig. 1 shows a kind of schematic diagram of parking lot DSRC roadside device of the utility model.
As shown in Figure 1, a kind of parking lot DSRC roadside device according to the present utility model, including, primary processor 110, master
It is microwave chip 120, RF switch 150, the first digital pad 130, power amplifier 140, the second digital pad 170, low
Noise amplifier 160, wherein
The primary processor 110 is connected with the main microwave chip 120, and is configured to, to the coding and decoding of data flow；
The main microwave chip 120 is connected with first digital pad 130, and is configured to, and realizes encoded data stream
Debugging and microwave data stream demodulation, and emit signal to first digital pad 130；
First digital pad 130 is connected with the power amplifier 140, and is configured to, and adjusts transmission power, will
Signal is sent to the power amplifier 140；
The power amplifier 140 is connected with the RF switch 150, and is configured to, and carries out power to transmitting signal and puts
Greatly, amplified signal is sent to the RF switch 150；
The RF switch 150 is connected with the low-noise amplifier 160, and is configured to, and to transmitting signal and receives letter
It number switches over；
The low-noise amplifier 160 is connected with second digital pad 170, and is configured to, to received signal
It amplifies, amplified signal is sent to second digital pad 170；
Second digital pad 170 is connected with the main microwave chip 120, and is configured to, and adjustment signal receives spirit
Sensitivity, and the signal received is sent to the main microwave chip 120；
First digital pad 130 and the power amplifier 140 form signal and emit link, and the low noise is put
Big device 160 and second digital pad 170 form signal receives link.
Above-mentioned each device can be realized with chip.
The primary processor 110 carries out the processing of baseband signal, and main includes the coding and decoding of data flow.
First digital pad 130 can be for digital adjustable attenuator, the transmission power for adjustment signal；It is described
Second digital pad 170 can be digital adjustable attenuator, be used for adjustment signal receiving sensitivity；First digital attenuation
Device 130 and second digital pad 170 can be according to parking lot complexity installation environments, and scene carries out flexible setting.
Using a power amplifier 140, reduce the amplification link series of signal transmitting link, had both met new
National standard, increase reliability, while also reducing costs because reducing material.
The RF switch 150 is also known as microwave switch, realizes the transformation of control microwave signal transmitting-receiving.Use one
A RF switch 150 can make Microwave emission region consistent with microwave receiving region.
The low-noise amplifier 160 is a kind of amplifier that noise coefficient is very low.In the occasion of amplification small-signal, put
The noise of big device itself may be very serious to the interference of signal, therefore, it is desirable to reduce this noise, to improve the signal-to-noise ratio of output.
It is amplified using 160 pairs of reception signals of the low-noise amplifier, increases receiving sensitivity.
Fig. 2 shows the schematic diagrames of another parking lot DSRC roadside device of the utility model.
As shown in Fig. 2, further including array antenna plate 210, the array antenna plate 210 is connected with the RF switch 150.
The array antenna is rearranged according to certain rules by many identical individual antennas, such as symmetrical antenna
Antenna system, also referred to as antenna array.Using a microwave array antenna plate 210, both Microwave emission region and microwave can be made to connect
It is consistent to receive region, and reduces equipment cost, reduces equipment volume size.Lesser equipment volume is conducive to parking lot environment
Setting installation.
Fig. 3 shows the schematic diagram of the equipment including temperature compensation attenuator.
As shown in figure 3, further including temperature compensation attenuator 310, it is micro- that the temperature compensation attenuator 310 is set to the master
It between wave chip 120 and first digital pad 130, and is configured to, the signal transmitting chain is adjusted according to temperature change
The signal on road is decayed.
Optionally, the signal for adjusting the signal transmitting link according to temperature change is decayed, including,
Decayed in advance when room temperature to signal；Signal is reduced when temperature increases and is decayed；Signal is increased when temperature reduces
Decaying.
The temperature compensation attenuator 310 is a kind of decaying that can increase negative temperature coefficient in signal transmitting link
Device.Since roadside device is as outside work equipment, temperature range is changed greatly, therefore what is be subject to is affected.Such as work as temperature
When degree increases, the transmission power of the power amplifier 140 can reduce as the temperature rises；When the temperature decreases, described
The transmission power of power amplifier 140 can increase with the reduction of temperature.It is successful after debugging to will result in scene in this way
The situation that signal area causes Various Seasonal inconsistent with the variation of temperature, it may be necessary to be debugged again in season, manpower
Increased costs, there are also problems for equipment dependability.It can be when room temperature, first to signal using temperature compensation attenuator 310
Decayed in advance；When temperature increases, and the decaying of the signal transmitting link increases, the temperature compensation attenuator 310 declines
Subtract to reduce automatically；And when temperature reduces, and the decaying of the signal transmitting link reduces, the temperature compensation attenuator
310 decaying can increase automatically.Ensure that the decaying fluctuation of entire signal transmitting link is smaller in this way, to guarantee port
Transmission power keep stablize.
The temperature compensation attenuator 310 can be automatic adjustment.It, can be in this way in equipment erecting bed after debugging
It avoids repeatedly debugging, has saved human cost, improved stabilization of equipment performance and reliability.
Fig. 4 shows the schematic diagram of the equipment comprising network interface connector.
As shown in figure 4, further including communication interface 410, the communication interface 410 is connected with the primary processor 110.
It optionally, further include network interface connector 420, the network interface connector 420 is connected with the communication interface 410, and
It is configured to, has not only transmitted signal but also transmits power supply.
Optionally, the network interface connector 420 is RJ45.
Optionally, the network interface connector 420 is provided with water-proof protection device.
The communication interface 410 can be realized with communication interface chip.
Due to parking lot in-site installation environment complexity and nonstandard, length of cable is required it is inconsistent, described in one
Network interface connector 420 had both transmitted signal or had transmitted power supply, and can save number of cables, both save the cost or more it is succinct.Make in this way
It uses straight through cable as communication line and power supply line, makes network interface connector at the construction field (site), as long as directly using network interface as needed
Pincers are cold-pressed crystal terminal and cable, can quick Fabrication cable and the length of cable situation according to needed for scene
It is made, avoids the waste of cable, reduce costs, it is convenient and efficient.
An embodiment according to the present utility model, can be by redefining the signal of the network interface connector 420
Above-mentioned purpose can be realized in meaning.It is illustrated for when the network interface connector 420 is RJ45 below, by again fixed
The signal meaning of adopted RJ45 achievees the purpose that signal can be transmitted but also transmits power supply.For example, working as the network interface connector 420
When for RJ45 network interface socket, it is as shown in table 1 below to can be, but not limited to definition signal meaning:
Table 1
That is, by the definition of definition, power supply to differential signal, the definition of network interface, the definition of RS422 to realize this
RJ45 can transmit signal but also transmit the purpose of power supply, and can be connected directly with cable, convenient and efficient.For serial line interface
Agreement can be not limited to RS422, can also include other single-ended signal interfaces or differential signal interface, such as RS232,
RS485 etc..
Water-proof protection device has can be set in the network interface connector 420.The water-proof protection device can be waterproof bag,
Water-proof protection device also can be set in waterproof cover, waterproof cover, water blocking tape, waterproof jacket etc., corresponding cable, it can makes the network interface
Connector 420 has water-proof function.
The technical solution of the utility model advantage is as follows:
1) RF switch and an array antenna plate are used, Microwave emission region and microwave receiving region one can be both made
It causes, and reduces equipment cost, reduce equipment volume size；
2) network interface connector of the utility model can be used straight through cable as communication line and power supply line, both transmit letter
Number again transmission power supply, construction site make network interface connector, convenient and efficient, save the cost；
3) temperature compensation attenuator of the utility model setting can emit the letter of link according to temperature change adjustment signal
Number decaying, can guarantee signal transmitting link decaying fluctuation it is smaller, thus guarantee port transmission power keep stablize；And
4) power amplifier is used, reduces the amplification link series of signal transmitting link, had both met new state
Mark requires, and increases reliability, while also reducing costs because reducing material.
The utility model is limited it should be noted that above-described embodiment illustrates rather than the utility model
System, and those skilled in the art can be designed alternative embodiment without departing from the scope of the appended claims.?
In claim, any reference symbol between parentheses should not be configured to limitations on claims.
Claims (8)
1. a kind of parking lot DSRC roadside device, which is characterized in that including primary processor, main microwave chip, RF switch, first
Digital pad, power amplifier, the second digital pad, low-noise amplifier, wherein
The primary processor is connected with the main microwave chip, and is configured to, to the coding and decoding of data flow；
The main microwave chip is connected with first digital pad, and is configured to, and realizes the debugging of encoded data stream and micro-
The demodulation of wave data flow, and emit signal to first digital pad；
First digital pad is connected with the power amplifier, and is configured to, and adjusts transmission power, sends the signal to
The power amplifier；
The power amplifier is connected with the RF switch, and is configured to, and power amplification is carried out to transmitting signal, after amplification
Signal be sent to the RF switch；
The RF switch is connected with the low-noise amplifier, and is configured to, and switches over to transmitting signal and reception signal；
The low-noise amplifier is connected with second digital pad, and is configured to, and amplifies to received signal, will
Amplified signal is sent to second digital pad；
Second digital pad is connected with the main microwave chip, and is configured to, adjustment signal receiving sensitivity, and will connect
The signal received is sent to the main microwave chip；
First digital pad and power amplifier composition signal emit link, the low-noise amplifier and described
Second digital pad forms signal receives link.
2. equipment according to claim 1, which is characterized in that it further include array antenna plate, the array antenna plate and institute
RF switch is stated to be connected.
3. equipment according to claim 1, which is characterized in that further include temperature compensation attenuator, the temperature-compensating declines
Subtract device to be set between the main microwave chip and first digital pad, and be configured to, institute is adjusted according to temperature change
State the signal decaying of signal transmitting link.
4. equipment according to claim 3, which is characterized in that described to adjust the signal transmitting link according to temperature change
Signal decaying, including,
Decayed in advance when room temperature to signal；
Signal is reduced when temperature increases and is decayed；
Signal is increased when temperature reduces and is decayed.
5. equipment according to claim 1, which is characterized in that it further include communication interface,
The communication interface is connected with the primary processor.
6. equipment according to claim 5, which is characterized in that it further include network interface connector,
The network interface connector is connected with the communication interface, and is configured to, and has not only transmitted signal but also has transmitted power supply.
7. equipment according to claim 6, which is characterized in that the network interface connector is RJ45.
8. equipment according to claim 6, which is characterized in that the network interface connector is provided with water-proof protection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821811860.3U CN209517119U (en) | 2018-11-05 | 2018-11-05 | A kind of parking lot DSRC roadside device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821811860.3U CN209517119U (en) | 2018-11-05 | 2018-11-05 | A kind of parking lot DSRC roadside device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209517119U true CN209517119U (en) | 2019-10-18 |
Family
ID=68191909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821811860.3U Expired - Fee Related CN209517119U (en) | 2018-11-05 | 2018-11-05 | A kind of parking lot DSRC roadside device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209517119U (en) |
-
2018
- 2018-11-05 CN CN201821811860.3U patent/CN209517119U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191018 |